1 /*
2 * Copyright (C) 2009 Nokia Corporation
3 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #define DSS_SUBSYS_NAME "DSI"
19
20 #include <linux/kernel.h>
21 #include <linux/mfd/syscon.h>
22 #include <linux/regmap.h>
23 #include <linux/io.h>
24 #include <linux/clk.h>
25 #include <linux/device.h>
26 #include <linux/err.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/mutex.h>
30 #include <linux/module.h>
31 #include <linux/semaphore.h>
32 #include <linux/seq_file.h>
33 #include <linux/platform_device.h>
34 #include <linux/regulator/consumer.h>
35 #include <linux/wait.h>
36 #include <linux/workqueue.h>
37 #include <linux/sched.h>
38 #include <linux/slab.h>
39 #include <linux/debugfs.h>
40 #include <linux/pm_runtime.h>
41 #include <linux/of.h>
42 #include <linux/of_graph.h>
43 #include <linux/of_platform.h>
44 #include <linux/component.h>
45 #include <linux/sys_soc.h>
46
47 #include <video/mipi_display.h>
48
49 #include "omapdss.h"
50 #include "dss.h"
51
52 #define DSI_CATCH_MISSING_TE
53
54 struct dsi_reg { u16 module; u16 idx; };
55
56 #define DSI_REG(mod, idx) ((const struct dsi_reg) { mod, idx })
57
58 /* DSI Protocol Engine */
59
60 #define DSI_PROTO 0
61 #define DSI_PROTO_SZ 0x200
62
63 #define DSI_REVISION DSI_REG(DSI_PROTO, 0x0000)
64 #define DSI_SYSCONFIG DSI_REG(DSI_PROTO, 0x0010)
65 #define DSI_SYSSTATUS DSI_REG(DSI_PROTO, 0x0014)
66 #define DSI_IRQSTATUS DSI_REG(DSI_PROTO, 0x0018)
67 #define DSI_IRQENABLE DSI_REG(DSI_PROTO, 0x001C)
68 #define DSI_CTRL DSI_REG(DSI_PROTO, 0x0040)
69 #define DSI_GNQ DSI_REG(DSI_PROTO, 0x0044)
70 #define DSI_COMPLEXIO_CFG1 DSI_REG(DSI_PROTO, 0x0048)
71 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(DSI_PROTO, 0x004C)
72 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(DSI_PROTO, 0x0050)
73 #define DSI_CLK_CTRL DSI_REG(DSI_PROTO, 0x0054)
74 #define DSI_TIMING1 DSI_REG(DSI_PROTO, 0x0058)
75 #define DSI_TIMING2 DSI_REG(DSI_PROTO, 0x005C)
76 #define DSI_VM_TIMING1 DSI_REG(DSI_PROTO, 0x0060)
77 #define DSI_VM_TIMING2 DSI_REG(DSI_PROTO, 0x0064)
78 #define DSI_VM_TIMING3 DSI_REG(DSI_PROTO, 0x0068)
79 #define DSI_CLK_TIMING DSI_REG(DSI_PROTO, 0x006C)
80 #define DSI_TX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0070)
81 #define DSI_RX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0074)
82 #define DSI_COMPLEXIO_CFG2 DSI_REG(DSI_PROTO, 0x0078)
83 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(DSI_PROTO, 0x007C)
84 #define DSI_VM_TIMING4 DSI_REG(DSI_PROTO, 0x0080)
85 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(DSI_PROTO, 0x0084)
86 #define DSI_VM_TIMING5 DSI_REG(DSI_PROTO, 0x0088)
87 #define DSI_VM_TIMING6 DSI_REG(DSI_PROTO, 0x008C)
88 #define DSI_VM_TIMING7 DSI_REG(DSI_PROTO, 0x0090)
89 #define DSI_STOPCLK_TIMING DSI_REG(DSI_PROTO, 0x0094)
90 #define DSI_VC_CTRL(n) DSI_REG(DSI_PROTO, 0x0100 + (n * 0x20))
91 #define DSI_VC_TE(n) DSI_REG(DSI_PROTO, 0x0104 + (n * 0x20))
92 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0108 + (n * 0x20))
93 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(DSI_PROTO, 0x010C + (n * 0x20))
94 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0110 + (n * 0x20))
95 #define DSI_VC_IRQSTATUS(n) DSI_REG(DSI_PROTO, 0x0118 + (n * 0x20))
96 #define DSI_VC_IRQENABLE(n) DSI_REG(DSI_PROTO, 0x011C + (n * 0x20))
97
98 /* DSIPHY_SCP */
99
100 #define DSI_PHY 1
101 #define DSI_PHY_OFFSET 0x200
102 #define DSI_PHY_SZ 0x40
103
104 #define DSI_DSIPHY_CFG0 DSI_REG(DSI_PHY, 0x0000)
105 #define DSI_DSIPHY_CFG1 DSI_REG(DSI_PHY, 0x0004)
106 #define DSI_DSIPHY_CFG2 DSI_REG(DSI_PHY, 0x0008)
107 #define DSI_DSIPHY_CFG5 DSI_REG(DSI_PHY, 0x0014)
108 #define DSI_DSIPHY_CFG10 DSI_REG(DSI_PHY, 0x0028)
109
110 /* DSI_PLL_CTRL_SCP */
111
112 #define DSI_PLL 2
113 #define DSI_PLL_OFFSET 0x300
114 #define DSI_PLL_SZ 0x20
115
116 #define DSI_PLL_CONTROL DSI_REG(DSI_PLL, 0x0000)
117 #define DSI_PLL_STATUS DSI_REG(DSI_PLL, 0x0004)
118 #define DSI_PLL_GO DSI_REG(DSI_PLL, 0x0008)
119 #define DSI_PLL_CONFIGURATION1 DSI_REG(DSI_PLL, 0x000C)
120 #define DSI_PLL_CONFIGURATION2 DSI_REG(DSI_PLL, 0x0010)
121
122 #define REG_GET(dsi, idx, start, end) \
123 FLD_GET(dsi_read_reg(dsi, idx), start, end)
124
125 #define REG_FLD_MOD(dsi, idx, val, start, end) \
126 dsi_write_reg(dsi, idx, FLD_MOD(dsi_read_reg(dsi, idx), val, start, end))
127
128 /* Global interrupts */
129 #define DSI_IRQ_VC0 (1 << 0)
130 #define DSI_IRQ_VC1 (1 << 1)
131 #define DSI_IRQ_VC2 (1 << 2)
132 #define DSI_IRQ_VC3 (1 << 3)
133 #define DSI_IRQ_WAKEUP (1 << 4)
134 #define DSI_IRQ_RESYNC (1 << 5)
135 #define DSI_IRQ_PLL_LOCK (1 << 7)
136 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
137 #define DSI_IRQ_PLL_RECALL (1 << 9)
138 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
139 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
140 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
141 #define DSI_IRQ_TE_TRIGGER (1 << 16)
142 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
143 #define DSI_IRQ_SYNC_LOST (1 << 18)
144 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
145 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
146 #define DSI_IRQ_ERROR_MASK \
147 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
148 DSI_IRQ_TA_TIMEOUT)
149 #define DSI_IRQ_CHANNEL_MASK 0xf
150
151 /* Virtual channel interrupts */
152 #define DSI_VC_IRQ_CS (1 << 0)
153 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
154 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
155 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
156 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
157 #define DSI_VC_IRQ_BTA (1 << 5)
158 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
159 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
160 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
161 #define DSI_VC_IRQ_ERROR_MASK \
162 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
163 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
164 DSI_VC_IRQ_FIFO_TX_UDF)
165
166 /* ComplexIO interrupts */
167 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
168 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
169 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
170 #define DSI_CIO_IRQ_ERRSYNCESC4 (1 << 3)
171 #define DSI_CIO_IRQ_ERRSYNCESC5 (1 << 4)
172 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
173 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
174 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
175 #define DSI_CIO_IRQ_ERRESC4 (1 << 8)
176 #define DSI_CIO_IRQ_ERRESC5 (1 << 9)
177 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
178 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
179 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
180 #define DSI_CIO_IRQ_ERRCONTROL4 (1 << 13)
181 #define DSI_CIO_IRQ_ERRCONTROL5 (1 << 14)
182 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
183 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
184 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
185 #define DSI_CIO_IRQ_STATEULPS4 (1 << 18)
186 #define DSI_CIO_IRQ_STATEULPS5 (1 << 19)
187 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
188 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
189 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
190 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
191 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
192 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
193 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_4 (1 << 26)
194 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_4 (1 << 27)
195 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_5 (1 << 28)
196 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_5 (1 << 29)
197 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
198 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
199 #define DSI_CIO_IRQ_ERROR_MASK \
200 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
201 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRSYNCESC4 | \
202 DSI_CIO_IRQ_ERRSYNCESC5 | \
203 DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
204 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRESC4 | \
205 DSI_CIO_IRQ_ERRESC5 | \
206 DSI_CIO_IRQ_ERRCONTROL1 | DSI_CIO_IRQ_ERRCONTROL2 | \
207 DSI_CIO_IRQ_ERRCONTROL3 | DSI_CIO_IRQ_ERRCONTROL4 | \
208 DSI_CIO_IRQ_ERRCONTROL5 | \
209 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
210 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
211 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3 | \
212 DSI_CIO_IRQ_ERRCONTENTIONLP0_4 | DSI_CIO_IRQ_ERRCONTENTIONLP1_4 | \
213 DSI_CIO_IRQ_ERRCONTENTIONLP0_5 | DSI_CIO_IRQ_ERRCONTENTIONLP1_5)
214
215 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
216 struct dsi_data;
217
218 static int dsi_display_init_dispc(struct dsi_data *dsi);
219 static void dsi_display_uninit_dispc(struct dsi_data *dsi);
220
221 static int dsi_vc_send_null(struct dsi_data *dsi, int channel);
222
223 /* DSI PLL HSDIV indices */
224 #define HSDIV_DISPC 0
225 #define HSDIV_DSI 1
226
227 #define DSI_MAX_NR_ISRS 2
228 #define DSI_MAX_NR_LANES 5
229
230 enum dsi_model {
231 DSI_MODEL_OMAP3,
232 DSI_MODEL_OMAP4,
233 DSI_MODEL_OMAP5,
234 };
235
236 enum dsi_lane_function {
237 DSI_LANE_UNUSED = 0,
238 DSI_LANE_CLK,
239 DSI_LANE_DATA1,
240 DSI_LANE_DATA2,
241 DSI_LANE_DATA3,
242 DSI_LANE_DATA4,
243 };
244
245 struct dsi_lane_config {
246 enum dsi_lane_function function;
247 u8 polarity;
248 };
249
250 struct dsi_isr_data {
251 omap_dsi_isr_t isr;
252 void *arg;
253 u32 mask;
254 };
255
256 enum fifo_size {
257 DSI_FIFO_SIZE_0 = 0,
258 DSI_FIFO_SIZE_32 = 1,
259 DSI_FIFO_SIZE_64 = 2,
260 DSI_FIFO_SIZE_96 = 3,
261 DSI_FIFO_SIZE_128 = 4,
262 };
263
264 enum dsi_vc_source {
265 DSI_VC_SOURCE_L4 = 0,
266 DSI_VC_SOURCE_VP,
267 };
268
269 struct dsi_irq_stats {
270 unsigned long last_reset;
271 unsigned int irq_count;
272 unsigned int dsi_irqs[32];
273 unsigned int vc_irqs[4][32];
274 unsigned int cio_irqs[32];
275 };
276
277 struct dsi_isr_tables {
278 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS];
279 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS];
280 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS];
281 };
282
283 struct dsi_clk_calc_ctx {
284 struct dsi_data *dsi;
285 struct dss_pll *pll;
286
287 /* inputs */
288
289 const struct omap_dss_dsi_config *config;
290
291 unsigned long req_pck_min, req_pck_nom, req_pck_max;
292
293 /* outputs */
294
295 struct dss_pll_clock_info dsi_cinfo;
296 struct dispc_clock_info dispc_cinfo;
297
298 struct videomode vm;
299 struct omap_dss_dsi_videomode_timings dsi_vm;
300 };
301
302 struct dsi_lp_clock_info {
303 unsigned long lp_clk;
304 u16 lp_clk_div;
305 };
306
307 struct dsi_module_id_data {
308 u32 address;
309 int id;
310 };
311
312 enum dsi_quirks {
313 DSI_QUIRK_PLL_PWR_BUG = (1 << 0), /* DSI-PLL power command 0x3 is not working */
314 DSI_QUIRK_DCS_CMD_CONFIG_VC = (1 << 1),
315 DSI_QUIRK_VC_OCP_WIDTH = (1 << 2),
316 DSI_QUIRK_REVERSE_TXCLKESC = (1 << 3),
317 DSI_QUIRK_GNQ = (1 << 4),
318 DSI_QUIRK_PHY_DCC = (1 << 5),
319 };
320
321 struct dsi_of_data {
322 enum dsi_model model;
323 const struct dss_pll_hw *pll_hw;
324 const struct dsi_module_id_data *modules;
325 unsigned int max_fck_freq;
326 unsigned int max_pll_lpdiv;
327 enum dsi_quirks quirks;
328 };
329
330 struct dsi_data {
331 struct device *dev;
332 void __iomem *proto_base;
333 void __iomem *phy_base;
334 void __iomem *pll_base;
335
336 const struct dsi_of_data *data;
337 int module_id;
338
339 int irq;
340
341 bool is_enabled;
342
343 struct clk *dss_clk;
344 struct regmap *syscon;
345 struct dss_device *dss;
346
347 struct dispc_clock_info user_dispc_cinfo;
348 struct dss_pll_clock_info user_dsi_cinfo;
349
350 struct dsi_lp_clock_info user_lp_cinfo;
351 struct dsi_lp_clock_info current_lp_cinfo;
352
353 struct dss_pll pll;
354
355 bool vdds_dsi_enabled;
356 struct regulator *vdds_dsi_reg;
357
358 struct {
359 enum dsi_vc_source source;
360 struct omap_dss_device *dssdev;
361 enum fifo_size tx_fifo_size;
362 enum fifo_size rx_fifo_size;
363 int vc_id;
364 } vc[4];
365
366 struct mutex lock;
367 struct semaphore bus_lock;
368
369 spinlock_t irq_lock;
370 struct dsi_isr_tables isr_tables;
371 /* space for a copy used by the interrupt handler */
372 struct dsi_isr_tables isr_tables_copy;
373
374 int update_channel;
375 #ifdef DSI_PERF_MEASURE
376 unsigned int update_bytes;
377 #endif
378
379 bool te_enabled;
380 bool ulps_enabled;
381
382 void (*framedone_callback)(int, void *);
383 void *framedone_data;
384
385 struct delayed_work framedone_timeout_work;
386
387 #ifdef DSI_CATCH_MISSING_TE
388 struct timer_list te_timer;
389 #endif
390
391 unsigned long cache_req_pck;
392 unsigned long cache_clk_freq;
393 struct dss_pll_clock_info cache_cinfo;
394
395 u32 errors;
396 spinlock_t errors_lock;
397 #ifdef DSI_PERF_MEASURE
398 ktime_t perf_setup_time;
399 ktime_t perf_start_time;
400 #endif
401 int debug_read;
402 int debug_write;
403 struct {
404 struct dss_debugfs_entry *irqs;
405 struct dss_debugfs_entry *regs;
406 } debugfs;
407
408 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
409 spinlock_t irq_stats_lock;
410 struct dsi_irq_stats irq_stats;
411 #endif
412
413 unsigned int num_lanes_supported;
414 unsigned int line_buffer_size;
415
416 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
417 unsigned int num_lanes_used;
418
419 unsigned int scp_clk_refcount;
420
421 struct dss_lcd_mgr_config mgr_config;
422 struct videomode vm;
423 enum omap_dss_dsi_pixel_format pix_fmt;
424 enum omap_dss_dsi_mode mode;
425 struct omap_dss_dsi_videomode_timings vm_timings;
426
427 struct omap_dss_device output;
428 };
429
430 struct dsi_packet_sent_handler_data {
431 struct dsi_data *dsi;
432 struct completion *completion;
433 };
434
435 #ifdef DSI_PERF_MEASURE
436 static bool dsi_perf;
437 module_param(dsi_perf, bool, 0644);
438 #endif
439
to_dsi_data(struct omap_dss_device * dssdev)440 static inline struct dsi_data *to_dsi_data(struct omap_dss_device *dssdev)
441 {
442 return dev_get_drvdata(dssdev->dev);
443 }
444
dsi_get_dsi_from_id(int module)445 static struct dsi_data *dsi_get_dsi_from_id(int module)
446 {
447 struct omap_dss_device *out;
448 enum omap_dss_output_id id;
449
450 switch (module) {
451 case 0:
452 id = OMAP_DSS_OUTPUT_DSI1;
453 break;
454 case 1:
455 id = OMAP_DSS_OUTPUT_DSI2;
456 break;
457 default:
458 return NULL;
459 }
460
461 out = omap_dss_get_output(id);
462
463 return out ? to_dsi_data(out) : NULL;
464 }
465
dsi_write_reg(struct dsi_data * dsi,const struct dsi_reg idx,u32 val)466 static inline void dsi_write_reg(struct dsi_data *dsi,
467 const struct dsi_reg idx, u32 val)
468 {
469 void __iomem *base;
470
471 switch(idx.module) {
472 case DSI_PROTO: base = dsi->proto_base; break;
473 case DSI_PHY: base = dsi->phy_base; break;
474 case DSI_PLL: base = dsi->pll_base; break;
475 default: return;
476 }
477
478 __raw_writel(val, base + idx.idx);
479 }
480
dsi_read_reg(struct dsi_data * dsi,const struct dsi_reg idx)481 static inline u32 dsi_read_reg(struct dsi_data *dsi, const struct dsi_reg idx)
482 {
483 void __iomem *base;
484
485 switch(idx.module) {
486 case DSI_PROTO: base = dsi->proto_base; break;
487 case DSI_PHY: base = dsi->phy_base; break;
488 case DSI_PLL: base = dsi->pll_base; break;
489 default: return 0;
490 }
491
492 return __raw_readl(base + idx.idx);
493 }
494
dsi_bus_lock(struct omap_dss_device * dssdev)495 static void dsi_bus_lock(struct omap_dss_device *dssdev)
496 {
497 struct dsi_data *dsi = to_dsi_data(dssdev);
498
499 down(&dsi->bus_lock);
500 }
501
dsi_bus_unlock(struct omap_dss_device * dssdev)502 static void dsi_bus_unlock(struct omap_dss_device *dssdev)
503 {
504 struct dsi_data *dsi = to_dsi_data(dssdev);
505
506 up(&dsi->bus_lock);
507 }
508
dsi_bus_is_locked(struct dsi_data * dsi)509 static bool dsi_bus_is_locked(struct dsi_data *dsi)
510 {
511 return dsi->bus_lock.count == 0;
512 }
513
dsi_completion_handler(void * data,u32 mask)514 static void dsi_completion_handler(void *data, u32 mask)
515 {
516 complete((struct completion *)data);
517 }
518
wait_for_bit_change(struct dsi_data * dsi,const struct dsi_reg idx,int bitnum,int value)519 static inline bool wait_for_bit_change(struct dsi_data *dsi,
520 const struct dsi_reg idx,
521 int bitnum, int value)
522 {
523 unsigned long timeout;
524 ktime_t wait;
525 int t;
526
527 /* first busyloop to see if the bit changes right away */
528 t = 100;
529 while (t-- > 0) {
530 if (REG_GET(dsi, idx, bitnum, bitnum) == value)
531 return true;
532 }
533
534 /* then loop for 500ms, sleeping for 1ms in between */
535 timeout = jiffies + msecs_to_jiffies(500);
536 while (time_before(jiffies, timeout)) {
537 if (REG_GET(dsi, idx, bitnum, bitnum) == value)
538 return true;
539
540 wait = ns_to_ktime(1000 * 1000);
541 set_current_state(TASK_UNINTERRUPTIBLE);
542 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
543 }
544
545 return false;
546 }
547
dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)548 static u8 dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)
549 {
550 switch (fmt) {
551 case OMAP_DSS_DSI_FMT_RGB888:
552 case OMAP_DSS_DSI_FMT_RGB666:
553 return 24;
554 case OMAP_DSS_DSI_FMT_RGB666_PACKED:
555 return 18;
556 case OMAP_DSS_DSI_FMT_RGB565:
557 return 16;
558 default:
559 BUG();
560 return 0;
561 }
562 }
563
564 #ifdef DSI_PERF_MEASURE
dsi_perf_mark_setup(struct dsi_data * dsi)565 static void dsi_perf_mark_setup(struct dsi_data *dsi)
566 {
567 dsi->perf_setup_time = ktime_get();
568 }
569
dsi_perf_mark_start(struct dsi_data * dsi)570 static void dsi_perf_mark_start(struct dsi_data *dsi)
571 {
572 dsi->perf_start_time = ktime_get();
573 }
574
dsi_perf_show(struct dsi_data * dsi,const char * name)575 static void dsi_perf_show(struct dsi_data *dsi, const char *name)
576 {
577 ktime_t t, setup_time, trans_time;
578 u32 total_bytes;
579 u32 setup_us, trans_us, total_us;
580
581 if (!dsi_perf)
582 return;
583
584 t = ktime_get();
585
586 setup_time = ktime_sub(dsi->perf_start_time, dsi->perf_setup_time);
587 setup_us = (u32)ktime_to_us(setup_time);
588 if (setup_us == 0)
589 setup_us = 1;
590
591 trans_time = ktime_sub(t, dsi->perf_start_time);
592 trans_us = (u32)ktime_to_us(trans_time);
593 if (trans_us == 0)
594 trans_us = 1;
595
596 total_us = setup_us + trans_us;
597
598 total_bytes = dsi->update_bytes;
599
600 pr_info("DSI(%s): %u us + %u us = %u us (%uHz), %u bytes, %u kbytes/sec\n",
601 name,
602 setup_us,
603 trans_us,
604 total_us,
605 1000 * 1000 / total_us,
606 total_bytes,
607 total_bytes * 1000 / total_us);
608 }
609 #else
dsi_perf_mark_setup(struct dsi_data * dsi)610 static inline void dsi_perf_mark_setup(struct dsi_data *dsi)
611 {
612 }
613
dsi_perf_mark_start(struct dsi_data * dsi)614 static inline void dsi_perf_mark_start(struct dsi_data *dsi)
615 {
616 }
617
dsi_perf_show(struct dsi_data * dsi,const char * name)618 static inline void dsi_perf_show(struct dsi_data *dsi, const char *name)
619 {
620 }
621 #endif
622
623 static int verbose_irq;
624
print_irq_status(u32 status)625 static void print_irq_status(u32 status)
626 {
627 if (status == 0)
628 return;
629
630 if (!verbose_irq && (status & ~DSI_IRQ_CHANNEL_MASK) == 0)
631 return;
632
633 #define PIS(x) (status & DSI_IRQ_##x) ? (#x " ") : ""
634
635 pr_debug("DSI IRQ: 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
636 status,
637 verbose_irq ? PIS(VC0) : "",
638 verbose_irq ? PIS(VC1) : "",
639 verbose_irq ? PIS(VC2) : "",
640 verbose_irq ? PIS(VC3) : "",
641 PIS(WAKEUP),
642 PIS(RESYNC),
643 PIS(PLL_LOCK),
644 PIS(PLL_UNLOCK),
645 PIS(PLL_RECALL),
646 PIS(COMPLEXIO_ERR),
647 PIS(HS_TX_TIMEOUT),
648 PIS(LP_RX_TIMEOUT),
649 PIS(TE_TRIGGER),
650 PIS(ACK_TRIGGER),
651 PIS(SYNC_LOST),
652 PIS(LDO_POWER_GOOD),
653 PIS(TA_TIMEOUT));
654 #undef PIS
655 }
656
print_irq_status_vc(int channel,u32 status)657 static void print_irq_status_vc(int channel, u32 status)
658 {
659 if (status == 0)
660 return;
661
662 if (!verbose_irq && (status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
663 return;
664
665 #define PIS(x) (status & DSI_VC_IRQ_##x) ? (#x " ") : ""
666
667 pr_debug("DSI VC(%d) IRQ 0x%x: %s%s%s%s%s%s%s%s%s\n",
668 channel,
669 status,
670 PIS(CS),
671 PIS(ECC_CORR),
672 PIS(ECC_NO_CORR),
673 verbose_irq ? PIS(PACKET_SENT) : "",
674 PIS(BTA),
675 PIS(FIFO_TX_OVF),
676 PIS(FIFO_RX_OVF),
677 PIS(FIFO_TX_UDF),
678 PIS(PP_BUSY_CHANGE));
679 #undef PIS
680 }
681
print_irq_status_cio(u32 status)682 static void print_irq_status_cio(u32 status)
683 {
684 if (status == 0)
685 return;
686
687 #define PIS(x) (status & DSI_CIO_IRQ_##x) ? (#x " ") : ""
688
689 pr_debug("DSI CIO IRQ 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
690 status,
691 PIS(ERRSYNCESC1),
692 PIS(ERRSYNCESC2),
693 PIS(ERRSYNCESC3),
694 PIS(ERRESC1),
695 PIS(ERRESC2),
696 PIS(ERRESC3),
697 PIS(ERRCONTROL1),
698 PIS(ERRCONTROL2),
699 PIS(ERRCONTROL3),
700 PIS(STATEULPS1),
701 PIS(STATEULPS2),
702 PIS(STATEULPS3),
703 PIS(ERRCONTENTIONLP0_1),
704 PIS(ERRCONTENTIONLP1_1),
705 PIS(ERRCONTENTIONLP0_2),
706 PIS(ERRCONTENTIONLP1_2),
707 PIS(ERRCONTENTIONLP0_3),
708 PIS(ERRCONTENTIONLP1_3),
709 PIS(ULPSACTIVENOT_ALL0),
710 PIS(ULPSACTIVENOT_ALL1));
711 #undef PIS
712 }
713
714 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
dsi_collect_irq_stats(struct dsi_data * dsi,u32 irqstatus,u32 * vcstatus,u32 ciostatus)715 static void dsi_collect_irq_stats(struct dsi_data *dsi, u32 irqstatus,
716 u32 *vcstatus, u32 ciostatus)
717 {
718 int i;
719
720 spin_lock(&dsi->irq_stats_lock);
721
722 dsi->irq_stats.irq_count++;
723 dss_collect_irq_stats(irqstatus, dsi->irq_stats.dsi_irqs);
724
725 for (i = 0; i < 4; ++i)
726 dss_collect_irq_stats(vcstatus[i], dsi->irq_stats.vc_irqs[i]);
727
728 dss_collect_irq_stats(ciostatus, dsi->irq_stats.cio_irqs);
729
730 spin_unlock(&dsi->irq_stats_lock);
731 }
732 #else
733 #define dsi_collect_irq_stats(dsi, irqstatus, vcstatus, ciostatus)
734 #endif
735
736 static int debug_irq;
737
dsi_handle_irq_errors(struct dsi_data * dsi,u32 irqstatus,u32 * vcstatus,u32 ciostatus)738 static void dsi_handle_irq_errors(struct dsi_data *dsi, u32 irqstatus,
739 u32 *vcstatus, u32 ciostatus)
740 {
741 int i;
742
743 if (irqstatus & DSI_IRQ_ERROR_MASK) {
744 DSSERR("DSI error, irqstatus %x\n", irqstatus);
745 print_irq_status(irqstatus);
746 spin_lock(&dsi->errors_lock);
747 dsi->errors |= irqstatus & DSI_IRQ_ERROR_MASK;
748 spin_unlock(&dsi->errors_lock);
749 } else if (debug_irq) {
750 print_irq_status(irqstatus);
751 }
752
753 for (i = 0; i < 4; ++i) {
754 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
755 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
756 i, vcstatus[i]);
757 print_irq_status_vc(i, vcstatus[i]);
758 } else if (debug_irq) {
759 print_irq_status_vc(i, vcstatus[i]);
760 }
761 }
762
763 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
764 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
765 print_irq_status_cio(ciostatus);
766 } else if (debug_irq) {
767 print_irq_status_cio(ciostatus);
768 }
769 }
770
dsi_call_isrs(struct dsi_isr_data * isr_array,unsigned int isr_array_size,u32 irqstatus)771 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
772 unsigned int isr_array_size, u32 irqstatus)
773 {
774 struct dsi_isr_data *isr_data;
775 int i;
776
777 for (i = 0; i < isr_array_size; i++) {
778 isr_data = &isr_array[i];
779 if (isr_data->isr && isr_data->mask & irqstatus)
780 isr_data->isr(isr_data->arg, irqstatus);
781 }
782 }
783
dsi_handle_isrs(struct dsi_isr_tables * isr_tables,u32 irqstatus,u32 * vcstatus,u32 ciostatus)784 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
785 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
786 {
787 int i;
788
789 dsi_call_isrs(isr_tables->isr_table,
790 ARRAY_SIZE(isr_tables->isr_table),
791 irqstatus);
792
793 for (i = 0; i < 4; ++i) {
794 if (vcstatus[i] == 0)
795 continue;
796 dsi_call_isrs(isr_tables->isr_table_vc[i],
797 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
798 vcstatus[i]);
799 }
800
801 if (ciostatus != 0)
802 dsi_call_isrs(isr_tables->isr_table_cio,
803 ARRAY_SIZE(isr_tables->isr_table_cio),
804 ciostatus);
805 }
806
omap_dsi_irq_handler(int irq,void * arg)807 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
808 {
809 struct dsi_data *dsi = arg;
810 u32 irqstatus, vcstatus[4], ciostatus;
811 int i;
812
813 if (!dsi->is_enabled)
814 return IRQ_NONE;
815
816 spin_lock(&dsi->irq_lock);
817
818 irqstatus = dsi_read_reg(dsi, DSI_IRQSTATUS);
819
820 /* IRQ is not for us */
821 if (!irqstatus) {
822 spin_unlock(&dsi->irq_lock);
823 return IRQ_NONE;
824 }
825
826 dsi_write_reg(dsi, DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
827 /* flush posted write */
828 dsi_read_reg(dsi, DSI_IRQSTATUS);
829
830 for (i = 0; i < 4; ++i) {
831 if ((irqstatus & (1 << i)) == 0) {
832 vcstatus[i] = 0;
833 continue;
834 }
835
836 vcstatus[i] = dsi_read_reg(dsi, DSI_VC_IRQSTATUS(i));
837
838 dsi_write_reg(dsi, DSI_VC_IRQSTATUS(i), vcstatus[i]);
839 /* flush posted write */
840 dsi_read_reg(dsi, DSI_VC_IRQSTATUS(i));
841 }
842
843 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
844 ciostatus = dsi_read_reg(dsi, DSI_COMPLEXIO_IRQ_STATUS);
845
846 dsi_write_reg(dsi, DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
847 /* flush posted write */
848 dsi_read_reg(dsi, DSI_COMPLEXIO_IRQ_STATUS);
849 } else {
850 ciostatus = 0;
851 }
852
853 #ifdef DSI_CATCH_MISSING_TE
854 if (irqstatus & DSI_IRQ_TE_TRIGGER)
855 del_timer(&dsi->te_timer);
856 #endif
857
858 /* make a copy and unlock, so that isrs can unregister
859 * themselves */
860 memcpy(&dsi->isr_tables_copy, &dsi->isr_tables,
861 sizeof(dsi->isr_tables));
862
863 spin_unlock(&dsi->irq_lock);
864
865 dsi_handle_isrs(&dsi->isr_tables_copy, irqstatus, vcstatus, ciostatus);
866
867 dsi_handle_irq_errors(dsi, irqstatus, vcstatus, ciostatus);
868
869 dsi_collect_irq_stats(dsi, irqstatus, vcstatus, ciostatus);
870
871 return IRQ_HANDLED;
872 }
873
874 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_configure_irqs(struct dsi_data * dsi,struct dsi_isr_data * isr_array,unsigned int isr_array_size,u32 default_mask,const struct dsi_reg enable_reg,const struct dsi_reg status_reg)875 static void _omap_dsi_configure_irqs(struct dsi_data *dsi,
876 struct dsi_isr_data *isr_array,
877 unsigned int isr_array_size,
878 u32 default_mask,
879 const struct dsi_reg enable_reg,
880 const struct dsi_reg status_reg)
881 {
882 struct dsi_isr_data *isr_data;
883 u32 mask;
884 u32 old_mask;
885 int i;
886
887 mask = default_mask;
888
889 for (i = 0; i < isr_array_size; i++) {
890 isr_data = &isr_array[i];
891
892 if (isr_data->isr == NULL)
893 continue;
894
895 mask |= isr_data->mask;
896 }
897
898 old_mask = dsi_read_reg(dsi, enable_reg);
899 /* clear the irqstatus for newly enabled irqs */
900 dsi_write_reg(dsi, status_reg, (mask ^ old_mask) & mask);
901 dsi_write_reg(dsi, enable_reg, mask);
902
903 /* flush posted writes */
904 dsi_read_reg(dsi, enable_reg);
905 dsi_read_reg(dsi, status_reg);
906 }
907
908 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs(struct dsi_data * dsi)909 static void _omap_dsi_set_irqs(struct dsi_data *dsi)
910 {
911 u32 mask = DSI_IRQ_ERROR_MASK;
912 #ifdef DSI_CATCH_MISSING_TE
913 mask |= DSI_IRQ_TE_TRIGGER;
914 #endif
915 _omap_dsi_configure_irqs(dsi, dsi->isr_tables.isr_table,
916 ARRAY_SIZE(dsi->isr_tables.isr_table), mask,
917 DSI_IRQENABLE, DSI_IRQSTATUS);
918 }
919
920 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs_vc(struct dsi_data * dsi,int vc)921 static void _omap_dsi_set_irqs_vc(struct dsi_data *dsi, int vc)
922 {
923 _omap_dsi_configure_irqs(dsi, dsi->isr_tables.isr_table_vc[vc],
924 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]),
925 DSI_VC_IRQ_ERROR_MASK,
926 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
927 }
928
929 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs_cio(struct dsi_data * dsi)930 static void _omap_dsi_set_irqs_cio(struct dsi_data *dsi)
931 {
932 _omap_dsi_configure_irqs(dsi, dsi->isr_tables.isr_table_cio,
933 ARRAY_SIZE(dsi->isr_tables.isr_table_cio),
934 DSI_CIO_IRQ_ERROR_MASK,
935 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
936 }
937
_dsi_initialize_irq(struct dsi_data * dsi)938 static void _dsi_initialize_irq(struct dsi_data *dsi)
939 {
940 unsigned long flags;
941 int vc;
942
943 spin_lock_irqsave(&dsi->irq_lock, flags);
944
945 memset(&dsi->isr_tables, 0, sizeof(dsi->isr_tables));
946
947 _omap_dsi_set_irqs(dsi);
948 for (vc = 0; vc < 4; ++vc)
949 _omap_dsi_set_irqs_vc(dsi, vc);
950 _omap_dsi_set_irqs_cio(dsi);
951
952 spin_unlock_irqrestore(&dsi->irq_lock, flags);
953 }
954
_dsi_register_isr(omap_dsi_isr_t isr,void * arg,u32 mask,struct dsi_isr_data * isr_array,unsigned int isr_array_size)955 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
956 struct dsi_isr_data *isr_array, unsigned int isr_array_size)
957 {
958 struct dsi_isr_data *isr_data;
959 int free_idx;
960 int i;
961
962 BUG_ON(isr == NULL);
963
964 /* check for duplicate entry and find a free slot */
965 free_idx = -1;
966 for (i = 0; i < isr_array_size; i++) {
967 isr_data = &isr_array[i];
968
969 if (isr_data->isr == isr && isr_data->arg == arg &&
970 isr_data->mask == mask) {
971 return -EINVAL;
972 }
973
974 if (isr_data->isr == NULL && free_idx == -1)
975 free_idx = i;
976 }
977
978 if (free_idx == -1)
979 return -EBUSY;
980
981 isr_data = &isr_array[free_idx];
982 isr_data->isr = isr;
983 isr_data->arg = arg;
984 isr_data->mask = mask;
985
986 return 0;
987 }
988
_dsi_unregister_isr(omap_dsi_isr_t isr,void * arg,u32 mask,struct dsi_isr_data * isr_array,unsigned int isr_array_size)989 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
990 struct dsi_isr_data *isr_array, unsigned int isr_array_size)
991 {
992 struct dsi_isr_data *isr_data;
993 int i;
994
995 for (i = 0; i < isr_array_size; i++) {
996 isr_data = &isr_array[i];
997 if (isr_data->isr != isr || isr_data->arg != arg ||
998 isr_data->mask != mask)
999 continue;
1000
1001 isr_data->isr = NULL;
1002 isr_data->arg = NULL;
1003 isr_data->mask = 0;
1004
1005 return 0;
1006 }
1007
1008 return -EINVAL;
1009 }
1010
dsi_register_isr(struct dsi_data * dsi,omap_dsi_isr_t isr,void * arg,u32 mask)1011 static int dsi_register_isr(struct dsi_data *dsi, omap_dsi_isr_t isr,
1012 void *arg, u32 mask)
1013 {
1014 unsigned long flags;
1015 int r;
1016
1017 spin_lock_irqsave(&dsi->irq_lock, flags);
1018
1019 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table,
1020 ARRAY_SIZE(dsi->isr_tables.isr_table));
1021
1022 if (r == 0)
1023 _omap_dsi_set_irqs(dsi);
1024
1025 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1026
1027 return r;
1028 }
1029
dsi_unregister_isr(struct dsi_data * dsi,omap_dsi_isr_t isr,void * arg,u32 mask)1030 static int dsi_unregister_isr(struct dsi_data *dsi, omap_dsi_isr_t isr,
1031 void *arg, u32 mask)
1032 {
1033 unsigned long flags;
1034 int r;
1035
1036 spin_lock_irqsave(&dsi->irq_lock, flags);
1037
1038 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table,
1039 ARRAY_SIZE(dsi->isr_tables.isr_table));
1040
1041 if (r == 0)
1042 _omap_dsi_set_irqs(dsi);
1043
1044 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1045
1046 return r;
1047 }
1048
dsi_register_isr_vc(struct dsi_data * dsi,int channel,omap_dsi_isr_t isr,void * arg,u32 mask)1049 static int dsi_register_isr_vc(struct dsi_data *dsi, int channel,
1050 omap_dsi_isr_t isr, void *arg, u32 mask)
1051 {
1052 unsigned long flags;
1053 int r;
1054
1055 spin_lock_irqsave(&dsi->irq_lock, flags);
1056
1057 r = _dsi_register_isr(isr, arg, mask,
1058 dsi->isr_tables.isr_table_vc[channel],
1059 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
1060
1061 if (r == 0)
1062 _omap_dsi_set_irqs_vc(dsi, channel);
1063
1064 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1065
1066 return r;
1067 }
1068
dsi_unregister_isr_vc(struct dsi_data * dsi,int channel,omap_dsi_isr_t isr,void * arg,u32 mask)1069 static int dsi_unregister_isr_vc(struct dsi_data *dsi, int channel,
1070 omap_dsi_isr_t isr, void *arg, u32 mask)
1071 {
1072 unsigned long flags;
1073 int r;
1074
1075 spin_lock_irqsave(&dsi->irq_lock, flags);
1076
1077 r = _dsi_unregister_isr(isr, arg, mask,
1078 dsi->isr_tables.isr_table_vc[channel],
1079 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
1080
1081 if (r == 0)
1082 _omap_dsi_set_irqs_vc(dsi, channel);
1083
1084 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1085
1086 return r;
1087 }
1088
dsi_register_isr_cio(struct dsi_data * dsi,omap_dsi_isr_t isr,void * arg,u32 mask)1089 static int dsi_register_isr_cio(struct dsi_data *dsi, omap_dsi_isr_t isr,
1090 void *arg, u32 mask)
1091 {
1092 unsigned long flags;
1093 int r;
1094
1095 spin_lock_irqsave(&dsi->irq_lock, flags);
1096
1097 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1098 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1099
1100 if (r == 0)
1101 _omap_dsi_set_irqs_cio(dsi);
1102
1103 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1104
1105 return r;
1106 }
1107
dsi_unregister_isr_cio(struct dsi_data * dsi,omap_dsi_isr_t isr,void * arg,u32 mask)1108 static int dsi_unregister_isr_cio(struct dsi_data *dsi, omap_dsi_isr_t isr,
1109 void *arg, u32 mask)
1110 {
1111 unsigned long flags;
1112 int r;
1113
1114 spin_lock_irqsave(&dsi->irq_lock, flags);
1115
1116 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1117 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1118
1119 if (r == 0)
1120 _omap_dsi_set_irqs_cio(dsi);
1121
1122 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1123
1124 return r;
1125 }
1126
dsi_get_errors(struct dsi_data * dsi)1127 static u32 dsi_get_errors(struct dsi_data *dsi)
1128 {
1129 unsigned long flags;
1130 u32 e;
1131
1132 spin_lock_irqsave(&dsi->errors_lock, flags);
1133 e = dsi->errors;
1134 dsi->errors = 0;
1135 spin_unlock_irqrestore(&dsi->errors_lock, flags);
1136 return e;
1137 }
1138
dsi_runtime_get(struct dsi_data * dsi)1139 static int dsi_runtime_get(struct dsi_data *dsi)
1140 {
1141 int r;
1142
1143 DSSDBG("dsi_runtime_get\n");
1144
1145 r = pm_runtime_get_sync(dsi->dev);
1146 WARN_ON(r < 0);
1147 return r < 0 ? r : 0;
1148 }
1149
dsi_runtime_put(struct dsi_data * dsi)1150 static void dsi_runtime_put(struct dsi_data *dsi)
1151 {
1152 int r;
1153
1154 DSSDBG("dsi_runtime_put\n");
1155
1156 r = pm_runtime_put_sync(dsi->dev);
1157 WARN_ON(r < 0 && r != -ENOSYS);
1158 }
1159
dsi_regulator_init(struct dsi_data * dsi)1160 static int dsi_regulator_init(struct dsi_data *dsi)
1161 {
1162 struct regulator *vdds_dsi;
1163
1164 if (dsi->vdds_dsi_reg != NULL)
1165 return 0;
1166
1167 vdds_dsi = devm_regulator_get(dsi->dev, "vdd");
1168
1169 if (IS_ERR(vdds_dsi)) {
1170 if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER)
1171 DSSERR("can't get DSI VDD regulator\n");
1172 return PTR_ERR(vdds_dsi);
1173 }
1174
1175 dsi->vdds_dsi_reg = vdds_dsi;
1176
1177 return 0;
1178 }
1179
_dsi_print_reset_status(struct dsi_data * dsi)1180 static void _dsi_print_reset_status(struct dsi_data *dsi)
1181 {
1182 u32 l;
1183 int b0, b1, b2;
1184
1185 /* A dummy read using the SCP interface to any DSIPHY register is
1186 * required after DSIPHY reset to complete the reset of the DSI complex
1187 * I/O. */
1188 l = dsi_read_reg(dsi, DSI_DSIPHY_CFG5);
1189
1190 if (dsi->data->quirks & DSI_QUIRK_REVERSE_TXCLKESC) {
1191 b0 = 28;
1192 b1 = 27;
1193 b2 = 26;
1194 } else {
1195 b0 = 24;
1196 b1 = 25;
1197 b2 = 26;
1198 }
1199
1200 #define DSI_FLD_GET(fld, start, end)\
1201 FLD_GET(dsi_read_reg(dsi, DSI_##fld), start, end)
1202
1203 pr_debug("DSI resets: PLL (%d) CIO (%d) PHY (%x%x%x, %d, %d, %d)\n",
1204 DSI_FLD_GET(PLL_STATUS, 0, 0),
1205 DSI_FLD_GET(COMPLEXIO_CFG1, 29, 29),
1206 DSI_FLD_GET(DSIPHY_CFG5, b0, b0),
1207 DSI_FLD_GET(DSIPHY_CFG5, b1, b1),
1208 DSI_FLD_GET(DSIPHY_CFG5, b2, b2),
1209 DSI_FLD_GET(DSIPHY_CFG5, 29, 29),
1210 DSI_FLD_GET(DSIPHY_CFG5, 30, 30),
1211 DSI_FLD_GET(DSIPHY_CFG5, 31, 31));
1212
1213 #undef DSI_FLD_GET
1214 }
1215
dsi_if_enable(struct dsi_data * dsi,bool enable)1216 static inline int dsi_if_enable(struct dsi_data *dsi, bool enable)
1217 {
1218 DSSDBG("dsi_if_enable(%d)\n", enable);
1219
1220 enable = enable ? 1 : 0;
1221 REG_FLD_MOD(dsi, DSI_CTRL, enable, 0, 0); /* IF_EN */
1222
1223 if (!wait_for_bit_change(dsi, DSI_CTRL, 0, enable)) {
1224 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
1225 return -EIO;
1226 }
1227
1228 return 0;
1229 }
1230
dsi_get_pll_hsdiv_dispc_rate(struct dsi_data * dsi)1231 static unsigned long dsi_get_pll_hsdiv_dispc_rate(struct dsi_data *dsi)
1232 {
1233 return dsi->pll.cinfo.clkout[HSDIV_DISPC];
1234 }
1235
dsi_get_pll_hsdiv_dsi_rate(struct dsi_data * dsi)1236 static unsigned long dsi_get_pll_hsdiv_dsi_rate(struct dsi_data *dsi)
1237 {
1238 return dsi->pll.cinfo.clkout[HSDIV_DSI];
1239 }
1240
dsi_get_txbyteclkhs(struct dsi_data * dsi)1241 static unsigned long dsi_get_txbyteclkhs(struct dsi_data *dsi)
1242 {
1243 return dsi->pll.cinfo.clkdco / 16;
1244 }
1245
dsi_fclk_rate(struct dsi_data * dsi)1246 static unsigned long dsi_fclk_rate(struct dsi_data *dsi)
1247 {
1248 unsigned long r;
1249 enum dss_clk_source source;
1250
1251 source = dss_get_dsi_clk_source(dsi->dss, dsi->module_id);
1252 if (source == DSS_CLK_SRC_FCK) {
1253 /* DSI FCLK source is DSS_CLK_FCK */
1254 r = clk_get_rate(dsi->dss_clk);
1255 } else {
1256 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1257 r = dsi_get_pll_hsdiv_dsi_rate(dsi);
1258 }
1259
1260 return r;
1261 }
1262
dsi_lp_clock_calc(unsigned long dsi_fclk,unsigned long lp_clk_min,unsigned long lp_clk_max,struct dsi_lp_clock_info * lp_cinfo)1263 static int dsi_lp_clock_calc(unsigned long dsi_fclk,
1264 unsigned long lp_clk_min, unsigned long lp_clk_max,
1265 struct dsi_lp_clock_info *lp_cinfo)
1266 {
1267 unsigned int lp_clk_div;
1268 unsigned long lp_clk;
1269
1270 lp_clk_div = DIV_ROUND_UP(dsi_fclk, lp_clk_max * 2);
1271 lp_clk = dsi_fclk / 2 / lp_clk_div;
1272
1273 if (lp_clk < lp_clk_min || lp_clk > lp_clk_max)
1274 return -EINVAL;
1275
1276 lp_cinfo->lp_clk_div = lp_clk_div;
1277 lp_cinfo->lp_clk = lp_clk;
1278
1279 return 0;
1280 }
1281
dsi_set_lp_clk_divisor(struct dsi_data * dsi)1282 static int dsi_set_lp_clk_divisor(struct dsi_data *dsi)
1283 {
1284 unsigned long dsi_fclk;
1285 unsigned int lp_clk_div;
1286 unsigned long lp_clk;
1287 unsigned int lpdiv_max = dsi->data->max_pll_lpdiv;
1288
1289
1290 lp_clk_div = dsi->user_lp_cinfo.lp_clk_div;
1291
1292 if (lp_clk_div == 0 || lp_clk_div > lpdiv_max)
1293 return -EINVAL;
1294
1295 dsi_fclk = dsi_fclk_rate(dsi);
1296
1297 lp_clk = dsi_fclk / 2 / lp_clk_div;
1298
1299 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1300 dsi->current_lp_cinfo.lp_clk = lp_clk;
1301 dsi->current_lp_cinfo.lp_clk_div = lp_clk_div;
1302
1303 /* LP_CLK_DIVISOR */
1304 REG_FLD_MOD(dsi, DSI_CLK_CTRL, lp_clk_div, 12, 0);
1305
1306 /* LP_RX_SYNCHRO_ENABLE */
1307 REG_FLD_MOD(dsi, DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0, 21, 21);
1308
1309 return 0;
1310 }
1311
dsi_enable_scp_clk(struct dsi_data * dsi)1312 static void dsi_enable_scp_clk(struct dsi_data *dsi)
1313 {
1314 if (dsi->scp_clk_refcount++ == 0)
1315 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */
1316 }
1317
dsi_disable_scp_clk(struct dsi_data * dsi)1318 static void dsi_disable_scp_clk(struct dsi_data *dsi)
1319 {
1320 WARN_ON(dsi->scp_clk_refcount == 0);
1321 if (--dsi->scp_clk_refcount == 0)
1322 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */
1323 }
1324
1325 enum dsi_pll_power_state {
1326 DSI_PLL_POWER_OFF = 0x0,
1327 DSI_PLL_POWER_ON_HSCLK = 0x1,
1328 DSI_PLL_POWER_ON_ALL = 0x2,
1329 DSI_PLL_POWER_ON_DIV = 0x3,
1330 };
1331
dsi_pll_power(struct dsi_data * dsi,enum dsi_pll_power_state state)1332 static int dsi_pll_power(struct dsi_data *dsi, enum dsi_pll_power_state state)
1333 {
1334 int t = 0;
1335
1336 /* DSI-PLL power command 0x3 is not working */
1337 if ((dsi->data->quirks & DSI_QUIRK_PLL_PWR_BUG) &&
1338 state == DSI_PLL_POWER_ON_DIV)
1339 state = DSI_PLL_POWER_ON_ALL;
1340
1341 /* PLL_PWR_CMD */
1342 REG_FLD_MOD(dsi, DSI_CLK_CTRL, state, 31, 30);
1343
1344 /* PLL_PWR_STATUS */
1345 while (FLD_GET(dsi_read_reg(dsi, DSI_CLK_CTRL), 29, 28) != state) {
1346 if (++t > 1000) {
1347 DSSERR("Failed to set DSI PLL power mode to %d\n",
1348 state);
1349 return -ENODEV;
1350 }
1351 udelay(1);
1352 }
1353
1354 return 0;
1355 }
1356
1357
dsi_pll_calc_dsi_fck(struct dsi_data * dsi,struct dss_pll_clock_info * cinfo)1358 static void dsi_pll_calc_dsi_fck(struct dsi_data *dsi,
1359 struct dss_pll_clock_info *cinfo)
1360 {
1361 unsigned long max_dsi_fck;
1362
1363 max_dsi_fck = dsi->data->max_fck_freq;
1364
1365 cinfo->mX[HSDIV_DSI] = DIV_ROUND_UP(cinfo->clkdco, max_dsi_fck);
1366 cinfo->clkout[HSDIV_DSI] = cinfo->clkdco / cinfo->mX[HSDIV_DSI];
1367 }
1368
dsi_pll_enable(struct dss_pll * pll)1369 static int dsi_pll_enable(struct dss_pll *pll)
1370 {
1371 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
1372 int r = 0;
1373
1374 DSSDBG("PLL init\n");
1375
1376 r = dsi_regulator_init(dsi);
1377 if (r)
1378 return r;
1379
1380 r = dsi_runtime_get(dsi);
1381 if (r)
1382 return r;
1383
1384 /*
1385 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4.
1386 */
1387 dsi_enable_scp_clk(dsi);
1388
1389 r = regulator_enable(dsi->vdds_dsi_reg);
1390 if (r)
1391 goto err0;
1392
1393 /* XXX PLL does not come out of reset without this... */
1394 dispc_pck_free_enable(dsi->dss->dispc, 1);
1395
1396 if (!wait_for_bit_change(dsi, DSI_PLL_STATUS, 0, 1)) {
1397 DSSERR("PLL not coming out of reset.\n");
1398 r = -ENODEV;
1399 dispc_pck_free_enable(dsi->dss->dispc, 0);
1400 goto err1;
1401 }
1402
1403 /* XXX ... but if left on, we get problems when planes do not
1404 * fill the whole display. No idea about this */
1405 dispc_pck_free_enable(dsi->dss->dispc, 0);
1406
1407 r = dsi_pll_power(dsi, DSI_PLL_POWER_ON_ALL);
1408
1409 if (r)
1410 goto err1;
1411
1412 DSSDBG("PLL init done\n");
1413
1414 return 0;
1415 err1:
1416 regulator_disable(dsi->vdds_dsi_reg);
1417 err0:
1418 dsi_disable_scp_clk(dsi);
1419 dsi_runtime_put(dsi);
1420 return r;
1421 }
1422
dsi_pll_disable(struct dss_pll * pll)1423 static void dsi_pll_disable(struct dss_pll *pll)
1424 {
1425 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
1426
1427 dsi_pll_power(dsi, DSI_PLL_POWER_OFF);
1428
1429 regulator_disable(dsi->vdds_dsi_reg);
1430
1431 dsi_disable_scp_clk(dsi);
1432 dsi_runtime_put(dsi);
1433
1434 DSSDBG("PLL disable done\n");
1435 }
1436
dsi_dump_dsi_clocks(struct dsi_data * dsi,struct seq_file * s)1437 static void dsi_dump_dsi_clocks(struct dsi_data *dsi, struct seq_file *s)
1438 {
1439 struct dss_pll_clock_info *cinfo = &dsi->pll.cinfo;
1440 enum dss_clk_source dispc_clk_src, dsi_clk_src;
1441 int dsi_module = dsi->module_id;
1442 struct dss_pll *pll = &dsi->pll;
1443
1444 dispc_clk_src = dss_get_dispc_clk_source(dsi->dss);
1445 dsi_clk_src = dss_get_dsi_clk_source(dsi->dss, dsi_module);
1446
1447 if (dsi_runtime_get(dsi))
1448 return;
1449
1450 seq_printf(s, "- DSI%d PLL -\n", dsi_module + 1);
1451
1452 seq_printf(s, "dsi pll clkin\t%lu\n", clk_get_rate(pll->clkin));
1453
1454 seq_printf(s, "Fint\t\t%-16lun %u\n", cinfo->fint, cinfo->n);
1455
1456 seq_printf(s, "CLKIN4DDR\t%-16lum %u\n",
1457 cinfo->clkdco, cinfo->m);
1458
1459 seq_printf(s, "DSI_PLL_HSDIV_DISPC (%s)\t%-16lum_dispc %u\t(%s)\n",
1460 dss_get_clk_source_name(dsi_module == 0 ?
1461 DSS_CLK_SRC_PLL1_1 :
1462 DSS_CLK_SRC_PLL2_1),
1463 cinfo->clkout[HSDIV_DISPC],
1464 cinfo->mX[HSDIV_DISPC],
1465 dispc_clk_src == DSS_CLK_SRC_FCK ?
1466 "off" : "on");
1467
1468 seq_printf(s, "DSI_PLL_HSDIV_DSI (%s)\t%-16lum_dsi %u\t(%s)\n",
1469 dss_get_clk_source_name(dsi_module == 0 ?
1470 DSS_CLK_SRC_PLL1_2 :
1471 DSS_CLK_SRC_PLL2_2),
1472 cinfo->clkout[HSDIV_DSI],
1473 cinfo->mX[HSDIV_DSI],
1474 dsi_clk_src == DSS_CLK_SRC_FCK ?
1475 "off" : "on");
1476
1477 seq_printf(s, "- DSI%d -\n", dsi_module + 1);
1478
1479 seq_printf(s, "dsi fclk source = %s\n",
1480 dss_get_clk_source_name(dsi_clk_src));
1481
1482 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate(dsi));
1483
1484 seq_printf(s, "DDR_CLK\t\t%lu\n",
1485 cinfo->clkdco / 4);
1486
1487 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs(dsi));
1488
1489 seq_printf(s, "LP_CLK\t\t%lu\n", dsi->current_lp_cinfo.lp_clk);
1490
1491 dsi_runtime_put(dsi);
1492 }
1493
dsi_dump_clocks(struct seq_file * s)1494 void dsi_dump_clocks(struct seq_file *s)
1495 {
1496 struct dsi_data *dsi;
1497 int i;
1498
1499 for (i = 0; i < MAX_NUM_DSI; i++) {
1500 dsi = dsi_get_dsi_from_id(i);
1501 if (dsi)
1502 dsi_dump_dsi_clocks(dsi, s);
1503 }
1504 }
1505
1506 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
dsi_dump_dsi_irqs(struct dsi_data * dsi,struct seq_file * s)1507 static void dsi_dump_dsi_irqs(struct dsi_data *dsi, struct seq_file *s)
1508 {
1509 unsigned long flags;
1510 struct dsi_irq_stats stats;
1511
1512 spin_lock_irqsave(&dsi->irq_stats_lock, flags);
1513
1514 stats = dsi->irq_stats;
1515 memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats));
1516 dsi->irq_stats.last_reset = jiffies;
1517
1518 spin_unlock_irqrestore(&dsi->irq_stats_lock, flags);
1519
1520 seq_printf(s, "period %u ms\n",
1521 jiffies_to_msecs(jiffies - stats.last_reset));
1522
1523 seq_printf(s, "irqs %d\n", stats.irq_count);
1524 #define PIS(x) \
1525 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1526
1527 seq_printf(s, "-- DSI%d interrupts --\n", dsi->module_id + 1);
1528 PIS(VC0);
1529 PIS(VC1);
1530 PIS(VC2);
1531 PIS(VC3);
1532 PIS(WAKEUP);
1533 PIS(RESYNC);
1534 PIS(PLL_LOCK);
1535 PIS(PLL_UNLOCK);
1536 PIS(PLL_RECALL);
1537 PIS(COMPLEXIO_ERR);
1538 PIS(HS_TX_TIMEOUT);
1539 PIS(LP_RX_TIMEOUT);
1540 PIS(TE_TRIGGER);
1541 PIS(ACK_TRIGGER);
1542 PIS(SYNC_LOST);
1543 PIS(LDO_POWER_GOOD);
1544 PIS(TA_TIMEOUT);
1545 #undef PIS
1546
1547 #define PIS(x) \
1548 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1549 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1550 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1551 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1552 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1553
1554 seq_printf(s, "-- VC interrupts --\n");
1555 PIS(CS);
1556 PIS(ECC_CORR);
1557 PIS(PACKET_SENT);
1558 PIS(FIFO_TX_OVF);
1559 PIS(FIFO_RX_OVF);
1560 PIS(BTA);
1561 PIS(ECC_NO_CORR);
1562 PIS(FIFO_TX_UDF);
1563 PIS(PP_BUSY_CHANGE);
1564 #undef PIS
1565
1566 #define PIS(x) \
1567 seq_printf(s, "%-20s %10d\n", #x, \
1568 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1569
1570 seq_printf(s, "-- CIO interrupts --\n");
1571 PIS(ERRSYNCESC1);
1572 PIS(ERRSYNCESC2);
1573 PIS(ERRSYNCESC3);
1574 PIS(ERRESC1);
1575 PIS(ERRESC2);
1576 PIS(ERRESC3);
1577 PIS(ERRCONTROL1);
1578 PIS(ERRCONTROL2);
1579 PIS(ERRCONTROL3);
1580 PIS(STATEULPS1);
1581 PIS(STATEULPS2);
1582 PIS(STATEULPS3);
1583 PIS(ERRCONTENTIONLP0_1);
1584 PIS(ERRCONTENTIONLP1_1);
1585 PIS(ERRCONTENTIONLP0_2);
1586 PIS(ERRCONTENTIONLP1_2);
1587 PIS(ERRCONTENTIONLP0_3);
1588 PIS(ERRCONTENTIONLP1_3);
1589 PIS(ULPSACTIVENOT_ALL0);
1590 PIS(ULPSACTIVENOT_ALL1);
1591 #undef PIS
1592 }
1593
dsi1_dump_irqs(struct seq_file * s,void * p)1594 static int dsi1_dump_irqs(struct seq_file *s, void *p)
1595 {
1596 struct dsi_data *dsi = dsi_get_dsi_from_id(0);
1597
1598 dsi_dump_dsi_irqs(dsi, s);
1599 return 0;
1600 }
1601
dsi2_dump_irqs(struct seq_file * s,void * p)1602 static int dsi2_dump_irqs(struct seq_file *s, void *p)
1603 {
1604 struct dsi_data *dsi = dsi_get_dsi_from_id(1);
1605
1606 dsi_dump_dsi_irqs(dsi, s);
1607 return 0;
1608 }
1609 #endif
1610
dsi_dump_dsi_regs(struct dsi_data * dsi,struct seq_file * s)1611 static void dsi_dump_dsi_regs(struct dsi_data *dsi, struct seq_file *s)
1612 {
1613 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(dsi, r))
1614
1615 if (dsi_runtime_get(dsi))
1616 return;
1617 dsi_enable_scp_clk(dsi);
1618
1619 DUMPREG(DSI_REVISION);
1620 DUMPREG(DSI_SYSCONFIG);
1621 DUMPREG(DSI_SYSSTATUS);
1622 DUMPREG(DSI_IRQSTATUS);
1623 DUMPREG(DSI_IRQENABLE);
1624 DUMPREG(DSI_CTRL);
1625 DUMPREG(DSI_COMPLEXIO_CFG1);
1626 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1627 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1628 DUMPREG(DSI_CLK_CTRL);
1629 DUMPREG(DSI_TIMING1);
1630 DUMPREG(DSI_TIMING2);
1631 DUMPREG(DSI_VM_TIMING1);
1632 DUMPREG(DSI_VM_TIMING2);
1633 DUMPREG(DSI_VM_TIMING3);
1634 DUMPREG(DSI_CLK_TIMING);
1635 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1636 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1637 DUMPREG(DSI_COMPLEXIO_CFG2);
1638 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1639 DUMPREG(DSI_VM_TIMING4);
1640 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1641 DUMPREG(DSI_VM_TIMING5);
1642 DUMPREG(DSI_VM_TIMING6);
1643 DUMPREG(DSI_VM_TIMING7);
1644 DUMPREG(DSI_STOPCLK_TIMING);
1645
1646 DUMPREG(DSI_VC_CTRL(0));
1647 DUMPREG(DSI_VC_TE(0));
1648 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1649 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1650 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1651 DUMPREG(DSI_VC_IRQSTATUS(0));
1652 DUMPREG(DSI_VC_IRQENABLE(0));
1653
1654 DUMPREG(DSI_VC_CTRL(1));
1655 DUMPREG(DSI_VC_TE(1));
1656 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1657 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1658 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1659 DUMPREG(DSI_VC_IRQSTATUS(1));
1660 DUMPREG(DSI_VC_IRQENABLE(1));
1661
1662 DUMPREG(DSI_VC_CTRL(2));
1663 DUMPREG(DSI_VC_TE(2));
1664 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1665 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1666 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1667 DUMPREG(DSI_VC_IRQSTATUS(2));
1668 DUMPREG(DSI_VC_IRQENABLE(2));
1669
1670 DUMPREG(DSI_VC_CTRL(3));
1671 DUMPREG(DSI_VC_TE(3));
1672 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1673 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1674 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1675 DUMPREG(DSI_VC_IRQSTATUS(3));
1676 DUMPREG(DSI_VC_IRQENABLE(3));
1677
1678 DUMPREG(DSI_DSIPHY_CFG0);
1679 DUMPREG(DSI_DSIPHY_CFG1);
1680 DUMPREG(DSI_DSIPHY_CFG2);
1681 DUMPREG(DSI_DSIPHY_CFG5);
1682
1683 DUMPREG(DSI_PLL_CONTROL);
1684 DUMPREG(DSI_PLL_STATUS);
1685 DUMPREG(DSI_PLL_GO);
1686 DUMPREG(DSI_PLL_CONFIGURATION1);
1687 DUMPREG(DSI_PLL_CONFIGURATION2);
1688
1689 dsi_disable_scp_clk(dsi);
1690 dsi_runtime_put(dsi);
1691 #undef DUMPREG
1692 }
1693
dsi1_dump_regs(struct seq_file * s,void * p)1694 static int dsi1_dump_regs(struct seq_file *s, void *p)
1695 {
1696 struct dsi_data *dsi = dsi_get_dsi_from_id(0);
1697
1698 dsi_dump_dsi_regs(dsi, s);
1699 return 0;
1700 }
1701
dsi2_dump_regs(struct seq_file * s,void * p)1702 static int dsi2_dump_regs(struct seq_file *s, void *p)
1703 {
1704 struct dsi_data *dsi = dsi_get_dsi_from_id(1);
1705
1706 dsi_dump_dsi_regs(dsi, s);
1707 return 0;
1708 }
1709
1710 enum dsi_cio_power_state {
1711 DSI_COMPLEXIO_POWER_OFF = 0x0,
1712 DSI_COMPLEXIO_POWER_ON = 0x1,
1713 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1714 };
1715
dsi_cio_power(struct dsi_data * dsi,enum dsi_cio_power_state state)1716 static int dsi_cio_power(struct dsi_data *dsi, enum dsi_cio_power_state state)
1717 {
1718 int t = 0;
1719
1720 /* PWR_CMD */
1721 REG_FLD_MOD(dsi, DSI_COMPLEXIO_CFG1, state, 28, 27);
1722
1723 /* PWR_STATUS */
1724 while (FLD_GET(dsi_read_reg(dsi, DSI_COMPLEXIO_CFG1),
1725 26, 25) != state) {
1726 if (++t > 1000) {
1727 DSSERR("failed to set complexio power state to "
1728 "%d\n", state);
1729 return -ENODEV;
1730 }
1731 udelay(1);
1732 }
1733
1734 return 0;
1735 }
1736
dsi_get_line_buf_size(struct dsi_data * dsi)1737 static unsigned int dsi_get_line_buf_size(struct dsi_data *dsi)
1738 {
1739 int val;
1740
1741 /* line buffer on OMAP3 is 1024 x 24bits */
1742 /* XXX: for some reason using full buffer size causes
1743 * considerable TX slowdown with update sizes that fill the
1744 * whole buffer */
1745 if (!(dsi->data->quirks & DSI_QUIRK_GNQ))
1746 return 1023 * 3;
1747
1748 val = REG_GET(dsi, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */
1749
1750 switch (val) {
1751 case 1:
1752 return 512 * 3; /* 512x24 bits */
1753 case 2:
1754 return 682 * 3; /* 682x24 bits */
1755 case 3:
1756 return 853 * 3; /* 853x24 bits */
1757 case 4:
1758 return 1024 * 3; /* 1024x24 bits */
1759 case 5:
1760 return 1194 * 3; /* 1194x24 bits */
1761 case 6:
1762 return 1365 * 3; /* 1365x24 bits */
1763 case 7:
1764 return 1920 * 3; /* 1920x24 bits */
1765 default:
1766 BUG();
1767 return 0;
1768 }
1769 }
1770
dsi_set_lane_config(struct dsi_data * dsi)1771 static int dsi_set_lane_config(struct dsi_data *dsi)
1772 {
1773 static const u8 offsets[] = { 0, 4, 8, 12, 16 };
1774 static const enum dsi_lane_function functions[] = {
1775 DSI_LANE_CLK,
1776 DSI_LANE_DATA1,
1777 DSI_LANE_DATA2,
1778 DSI_LANE_DATA3,
1779 DSI_LANE_DATA4,
1780 };
1781 u32 r;
1782 int i;
1783
1784 r = dsi_read_reg(dsi, DSI_COMPLEXIO_CFG1);
1785
1786 for (i = 0; i < dsi->num_lanes_used; ++i) {
1787 unsigned int offset = offsets[i];
1788 unsigned int polarity, lane_number;
1789 unsigned int t;
1790
1791 for (t = 0; t < dsi->num_lanes_supported; ++t)
1792 if (dsi->lanes[t].function == functions[i])
1793 break;
1794
1795 if (t == dsi->num_lanes_supported)
1796 return -EINVAL;
1797
1798 lane_number = t;
1799 polarity = dsi->lanes[t].polarity;
1800
1801 r = FLD_MOD(r, lane_number + 1, offset + 2, offset);
1802 r = FLD_MOD(r, polarity, offset + 3, offset + 3);
1803 }
1804
1805 /* clear the unused lanes */
1806 for (; i < dsi->num_lanes_supported; ++i) {
1807 unsigned int offset = offsets[i];
1808
1809 r = FLD_MOD(r, 0, offset + 2, offset);
1810 r = FLD_MOD(r, 0, offset + 3, offset + 3);
1811 }
1812
1813 dsi_write_reg(dsi, DSI_COMPLEXIO_CFG1, r);
1814
1815 return 0;
1816 }
1817
ns2ddr(struct dsi_data * dsi,unsigned int ns)1818 static inline unsigned int ns2ddr(struct dsi_data *dsi, unsigned int ns)
1819 {
1820 /* convert time in ns to ddr ticks, rounding up */
1821 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1822
1823 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1824 }
1825
ddr2ns(struct dsi_data * dsi,unsigned int ddr)1826 static inline unsigned int ddr2ns(struct dsi_data *dsi, unsigned int ddr)
1827 {
1828 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1829
1830 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1831 }
1832
dsi_cio_timings(struct dsi_data * dsi)1833 static void dsi_cio_timings(struct dsi_data *dsi)
1834 {
1835 u32 r;
1836 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1837 u32 tlpx_half, tclk_trail, tclk_zero;
1838 u32 tclk_prepare;
1839
1840 /* calculate timings */
1841
1842 /* 1 * DDR_CLK = 2 * UI */
1843
1844 /* min 40ns + 4*UI max 85ns + 6*UI */
1845 ths_prepare = ns2ddr(dsi, 70) + 2;
1846
1847 /* min 145ns + 10*UI */
1848 ths_prepare_ths_zero = ns2ddr(dsi, 175) + 2;
1849
1850 /* min max(8*UI, 60ns+4*UI) */
1851 ths_trail = ns2ddr(dsi, 60) + 5;
1852
1853 /* min 100ns */
1854 ths_exit = ns2ddr(dsi, 145);
1855
1856 /* tlpx min 50n */
1857 tlpx_half = ns2ddr(dsi, 25);
1858
1859 /* min 60ns */
1860 tclk_trail = ns2ddr(dsi, 60) + 2;
1861
1862 /* min 38ns, max 95ns */
1863 tclk_prepare = ns2ddr(dsi, 65);
1864
1865 /* min tclk-prepare + tclk-zero = 300ns */
1866 tclk_zero = ns2ddr(dsi, 260);
1867
1868 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1869 ths_prepare, ddr2ns(dsi, ths_prepare),
1870 ths_prepare_ths_zero, ddr2ns(dsi, ths_prepare_ths_zero));
1871 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1872 ths_trail, ddr2ns(dsi, ths_trail),
1873 ths_exit, ddr2ns(dsi, ths_exit));
1874
1875 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1876 "tclk_zero %u (%uns)\n",
1877 tlpx_half, ddr2ns(dsi, tlpx_half),
1878 tclk_trail, ddr2ns(dsi, tclk_trail),
1879 tclk_zero, ddr2ns(dsi, tclk_zero));
1880 DSSDBG("tclk_prepare %u (%uns)\n",
1881 tclk_prepare, ddr2ns(dsi, tclk_prepare));
1882
1883 /* program timings */
1884
1885 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG0);
1886 r = FLD_MOD(r, ths_prepare, 31, 24);
1887 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1888 r = FLD_MOD(r, ths_trail, 15, 8);
1889 r = FLD_MOD(r, ths_exit, 7, 0);
1890 dsi_write_reg(dsi, DSI_DSIPHY_CFG0, r);
1891
1892 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG1);
1893 r = FLD_MOD(r, tlpx_half, 20, 16);
1894 r = FLD_MOD(r, tclk_trail, 15, 8);
1895 r = FLD_MOD(r, tclk_zero, 7, 0);
1896
1897 if (dsi->data->quirks & DSI_QUIRK_PHY_DCC) {
1898 r = FLD_MOD(r, 0, 21, 21); /* DCCEN = disable */
1899 r = FLD_MOD(r, 1, 22, 22); /* CLKINP_DIVBY2EN = enable */
1900 r = FLD_MOD(r, 1, 23, 23); /* CLKINP_SEL = enable */
1901 }
1902
1903 dsi_write_reg(dsi, DSI_DSIPHY_CFG1, r);
1904
1905 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG2);
1906 r = FLD_MOD(r, tclk_prepare, 7, 0);
1907 dsi_write_reg(dsi, DSI_DSIPHY_CFG2, r);
1908 }
1909
1910 /* lane masks have lane 0 at lsb. mask_p for positive lines, n for negative */
dsi_cio_enable_lane_override(struct dsi_data * dsi,unsigned int mask_p,unsigned int mask_n)1911 static void dsi_cio_enable_lane_override(struct dsi_data *dsi,
1912 unsigned int mask_p,
1913 unsigned int mask_n)
1914 {
1915 int i;
1916 u32 l;
1917 u8 lptxscp_start = dsi->num_lanes_supported == 3 ? 22 : 26;
1918
1919 l = 0;
1920
1921 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1922 unsigned int p = dsi->lanes[i].polarity;
1923
1924 if (mask_p & (1 << i))
1925 l |= 1 << (i * 2 + (p ? 0 : 1));
1926
1927 if (mask_n & (1 << i))
1928 l |= 1 << (i * 2 + (p ? 1 : 0));
1929 }
1930
1931 /*
1932 * Bits in REGLPTXSCPDAT4TO0DXDY:
1933 * 17: DY0 18: DX0
1934 * 19: DY1 20: DX1
1935 * 21: DY2 22: DX2
1936 * 23: DY3 24: DX3
1937 * 25: DY4 26: DX4
1938 */
1939
1940 /* Set the lane override configuration */
1941
1942 /* REGLPTXSCPDAT4TO0DXDY */
1943 REG_FLD_MOD(dsi, DSI_DSIPHY_CFG10, l, lptxscp_start, 17);
1944
1945 /* Enable lane override */
1946
1947 /* ENLPTXSCPDAT */
1948 REG_FLD_MOD(dsi, DSI_DSIPHY_CFG10, 1, 27, 27);
1949 }
1950
dsi_cio_disable_lane_override(struct dsi_data * dsi)1951 static void dsi_cio_disable_lane_override(struct dsi_data *dsi)
1952 {
1953 /* Disable lane override */
1954 REG_FLD_MOD(dsi, DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */
1955 /* Reset the lane override configuration */
1956 /* REGLPTXSCPDAT4TO0DXDY */
1957 REG_FLD_MOD(dsi, DSI_DSIPHY_CFG10, 0, 22, 17);
1958 }
1959
dsi_cio_wait_tx_clk_esc_reset(struct dsi_data * dsi)1960 static int dsi_cio_wait_tx_clk_esc_reset(struct dsi_data *dsi)
1961 {
1962 int t, i;
1963 bool in_use[DSI_MAX_NR_LANES];
1964 static const u8 offsets_old[] = { 28, 27, 26 };
1965 static const u8 offsets_new[] = { 24, 25, 26, 27, 28 };
1966 const u8 *offsets;
1967
1968 if (dsi->data->quirks & DSI_QUIRK_REVERSE_TXCLKESC)
1969 offsets = offsets_old;
1970 else
1971 offsets = offsets_new;
1972
1973 for (i = 0; i < dsi->num_lanes_supported; ++i)
1974 in_use[i] = dsi->lanes[i].function != DSI_LANE_UNUSED;
1975
1976 t = 100000;
1977 while (true) {
1978 u32 l;
1979 int ok;
1980
1981 l = dsi_read_reg(dsi, DSI_DSIPHY_CFG5);
1982
1983 ok = 0;
1984 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1985 if (!in_use[i] || (l & (1 << offsets[i])))
1986 ok++;
1987 }
1988
1989 if (ok == dsi->num_lanes_supported)
1990 break;
1991
1992 if (--t == 0) {
1993 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1994 if (!in_use[i] || (l & (1 << offsets[i])))
1995 continue;
1996
1997 DSSERR("CIO TXCLKESC%d domain not coming " \
1998 "out of reset\n", i);
1999 }
2000 return -EIO;
2001 }
2002 }
2003
2004 return 0;
2005 }
2006
2007 /* return bitmask of enabled lanes, lane0 being the lsb */
dsi_get_lane_mask(struct dsi_data * dsi)2008 static unsigned int dsi_get_lane_mask(struct dsi_data *dsi)
2009 {
2010 unsigned int mask = 0;
2011 int i;
2012
2013 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2014 if (dsi->lanes[i].function != DSI_LANE_UNUSED)
2015 mask |= 1 << i;
2016 }
2017
2018 return mask;
2019 }
2020
2021 /* OMAP4 CONTROL_DSIPHY */
2022 #define OMAP4_DSIPHY_SYSCON_OFFSET 0x78
2023
2024 #define OMAP4_DSI2_LANEENABLE_SHIFT 29
2025 #define OMAP4_DSI2_LANEENABLE_MASK (0x7 << 29)
2026 #define OMAP4_DSI1_LANEENABLE_SHIFT 24
2027 #define OMAP4_DSI1_LANEENABLE_MASK (0x1f << 24)
2028 #define OMAP4_DSI1_PIPD_SHIFT 19
2029 #define OMAP4_DSI1_PIPD_MASK (0x1f << 19)
2030 #define OMAP4_DSI2_PIPD_SHIFT 14
2031 #define OMAP4_DSI2_PIPD_MASK (0x1f << 14)
2032
dsi_omap4_mux_pads(struct dsi_data * dsi,unsigned int lanes)2033 static int dsi_omap4_mux_pads(struct dsi_data *dsi, unsigned int lanes)
2034 {
2035 u32 enable_mask, enable_shift;
2036 u32 pipd_mask, pipd_shift;
2037
2038 if (dsi->module_id == 0) {
2039 enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
2040 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
2041 pipd_mask = OMAP4_DSI1_PIPD_MASK;
2042 pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
2043 } else if (dsi->module_id == 1) {
2044 enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
2045 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
2046 pipd_mask = OMAP4_DSI2_PIPD_MASK;
2047 pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
2048 } else {
2049 return -ENODEV;
2050 }
2051
2052 return regmap_update_bits(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET,
2053 enable_mask | pipd_mask,
2054 (lanes << enable_shift) | (lanes << pipd_shift));
2055 }
2056
2057 /* OMAP5 CONTROL_DSIPHY */
2058
2059 #define OMAP5_DSIPHY_SYSCON_OFFSET 0x74
2060
2061 #define OMAP5_DSI1_LANEENABLE_SHIFT 24
2062 #define OMAP5_DSI2_LANEENABLE_SHIFT 19
2063 #define OMAP5_DSI_LANEENABLE_MASK 0x1f
2064
dsi_omap5_mux_pads(struct dsi_data * dsi,unsigned int lanes)2065 static int dsi_omap5_mux_pads(struct dsi_data *dsi, unsigned int lanes)
2066 {
2067 u32 enable_shift;
2068
2069 if (dsi->module_id == 0)
2070 enable_shift = OMAP5_DSI1_LANEENABLE_SHIFT;
2071 else if (dsi->module_id == 1)
2072 enable_shift = OMAP5_DSI2_LANEENABLE_SHIFT;
2073 else
2074 return -ENODEV;
2075
2076 return regmap_update_bits(dsi->syscon, OMAP5_DSIPHY_SYSCON_OFFSET,
2077 OMAP5_DSI_LANEENABLE_MASK << enable_shift,
2078 lanes << enable_shift);
2079 }
2080
dsi_enable_pads(struct dsi_data * dsi,unsigned int lane_mask)2081 static int dsi_enable_pads(struct dsi_data *dsi, unsigned int lane_mask)
2082 {
2083 if (dsi->data->model == DSI_MODEL_OMAP4)
2084 return dsi_omap4_mux_pads(dsi, lane_mask);
2085 if (dsi->data->model == DSI_MODEL_OMAP5)
2086 return dsi_omap5_mux_pads(dsi, lane_mask);
2087 return 0;
2088 }
2089
dsi_disable_pads(struct dsi_data * dsi)2090 static void dsi_disable_pads(struct dsi_data *dsi)
2091 {
2092 if (dsi->data->model == DSI_MODEL_OMAP4)
2093 dsi_omap4_mux_pads(dsi, 0);
2094 else if (dsi->data->model == DSI_MODEL_OMAP5)
2095 dsi_omap5_mux_pads(dsi, 0);
2096 }
2097
dsi_cio_init(struct dsi_data * dsi)2098 static int dsi_cio_init(struct dsi_data *dsi)
2099 {
2100 int r;
2101 u32 l;
2102
2103 DSSDBG("DSI CIO init starts");
2104
2105 r = dsi_enable_pads(dsi, dsi_get_lane_mask(dsi));
2106 if (r)
2107 return r;
2108
2109 dsi_enable_scp_clk(dsi);
2110
2111 /* A dummy read using the SCP interface to any DSIPHY register is
2112 * required after DSIPHY reset to complete the reset of the DSI complex
2113 * I/O. */
2114 dsi_read_reg(dsi, DSI_DSIPHY_CFG5);
2115
2116 if (!wait_for_bit_change(dsi, DSI_DSIPHY_CFG5, 30, 1)) {
2117 DSSERR("CIO SCP Clock domain not coming out of reset.\n");
2118 r = -EIO;
2119 goto err_scp_clk_dom;
2120 }
2121
2122 r = dsi_set_lane_config(dsi);
2123 if (r)
2124 goto err_scp_clk_dom;
2125
2126 /* set TX STOP MODE timer to maximum for this operation */
2127 l = dsi_read_reg(dsi, DSI_TIMING1);
2128 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2129 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
2130 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
2131 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
2132 dsi_write_reg(dsi, DSI_TIMING1, l);
2133
2134 if (dsi->ulps_enabled) {
2135 unsigned int mask_p;
2136 int i;
2137
2138 DSSDBG("manual ulps exit\n");
2139
2140 /* ULPS is exited by Mark-1 state for 1ms, followed by
2141 * stop state. DSS HW cannot do this via the normal
2142 * ULPS exit sequence, as after reset the DSS HW thinks
2143 * that we are not in ULPS mode, and refuses to send the
2144 * sequence. So we need to send the ULPS exit sequence
2145 * manually by setting positive lines high and negative lines
2146 * low for 1ms.
2147 */
2148
2149 mask_p = 0;
2150
2151 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2152 if (dsi->lanes[i].function == DSI_LANE_UNUSED)
2153 continue;
2154 mask_p |= 1 << i;
2155 }
2156
2157 dsi_cio_enable_lane_override(dsi, mask_p, 0);
2158 }
2159
2160 r = dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_ON);
2161 if (r)
2162 goto err_cio_pwr;
2163
2164 if (!wait_for_bit_change(dsi, DSI_COMPLEXIO_CFG1, 29, 1)) {
2165 DSSERR("CIO PWR clock domain not coming out of reset.\n");
2166 r = -ENODEV;
2167 goto err_cio_pwr_dom;
2168 }
2169
2170 dsi_if_enable(dsi, true);
2171 dsi_if_enable(dsi, false);
2172 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
2173
2174 r = dsi_cio_wait_tx_clk_esc_reset(dsi);
2175 if (r)
2176 goto err_tx_clk_esc_rst;
2177
2178 if (dsi->ulps_enabled) {
2179 /* Keep Mark-1 state for 1ms (as per DSI spec) */
2180 ktime_t wait = ns_to_ktime(1000 * 1000);
2181 set_current_state(TASK_UNINTERRUPTIBLE);
2182 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
2183
2184 /* Disable the override. The lanes should be set to Mark-11
2185 * state by the HW */
2186 dsi_cio_disable_lane_override(dsi);
2187 }
2188
2189 /* FORCE_TX_STOP_MODE_IO */
2190 REG_FLD_MOD(dsi, DSI_TIMING1, 0, 15, 15);
2191
2192 dsi_cio_timings(dsi);
2193
2194 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
2195 /* DDR_CLK_ALWAYS_ON */
2196 REG_FLD_MOD(dsi, DSI_CLK_CTRL,
2197 dsi->vm_timings.ddr_clk_always_on, 13, 13);
2198 }
2199
2200 dsi->ulps_enabled = false;
2201
2202 DSSDBG("CIO init done\n");
2203
2204 return 0;
2205
2206 err_tx_clk_esc_rst:
2207 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 20, 20); /* LP_CLK_ENABLE */
2208 err_cio_pwr_dom:
2209 dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_OFF);
2210 err_cio_pwr:
2211 if (dsi->ulps_enabled)
2212 dsi_cio_disable_lane_override(dsi);
2213 err_scp_clk_dom:
2214 dsi_disable_scp_clk(dsi);
2215 dsi_disable_pads(dsi);
2216 return r;
2217 }
2218
dsi_cio_uninit(struct dsi_data * dsi)2219 static void dsi_cio_uninit(struct dsi_data *dsi)
2220 {
2221 /* DDR_CLK_ALWAYS_ON */
2222 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 13, 13);
2223
2224 dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_OFF);
2225 dsi_disable_scp_clk(dsi);
2226 dsi_disable_pads(dsi);
2227 }
2228
dsi_config_tx_fifo(struct dsi_data * dsi,enum fifo_size size1,enum fifo_size size2,enum fifo_size size3,enum fifo_size size4)2229 static void dsi_config_tx_fifo(struct dsi_data *dsi,
2230 enum fifo_size size1, enum fifo_size size2,
2231 enum fifo_size size3, enum fifo_size size4)
2232 {
2233 u32 r = 0;
2234 int add = 0;
2235 int i;
2236
2237 dsi->vc[0].tx_fifo_size = size1;
2238 dsi->vc[1].tx_fifo_size = size2;
2239 dsi->vc[2].tx_fifo_size = size3;
2240 dsi->vc[3].tx_fifo_size = size4;
2241
2242 for (i = 0; i < 4; i++) {
2243 u8 v;
2244 int size = dsi->vc[i].tx_fifo_size;
2245
2246 if (add + size > 4) {
2247 DSSERR("Illegal FIFO configuration\n");
2248 BUG();
2249 return;
2250 }
2251
2252 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2253 r |= v << (8 * i);
2254 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
2255 add += size;
2256 }
2257
2258 dsi_write_reg(dsi, DSI_TX_FIFO_VC_SIZE, r);
2259 }
2260
dsi_config_rx_fifo(struct dsi_data * dsi,enum fifo_size size1,enum fifo_size size2,enum fifo_size size3,enum fifo_size size4)2261 static void dsi_config_rx_fifo(struct dsi_data *dsi,
2262 enum fifo_size size1, enum fifo_size size2,
2263 enum fifo_size size3, enum fifo_size size4)
2264 {
2265 u32 r = 0;
2266 int add = 0;
2267 int i;
2268
2269 dsi->vc[0].rx_fifo_size = size1;
2270 dsi->vc[1].rx_fifo_size = size2;
2271 dsi->vc[2].rx_fifo_size = size3;
2272 dsi->vc[3].rx_fifo_size = size4;
2273
2274 for (i = 0; i < 4; i++) {
2275 u8 v;
2276 int size = dsi->vc[i].rx_fifo_size;
2277
2278 if (add + size > 4) {
2279 DSSERR("Illegal FIFO configuration\n");
2280 BUG();
2281 return;
2282 }
2283
2284 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2285 r |= v << (8 * i);
2286 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2287 add += size;
2288 }
2289
2290 dsi_write_reg(dsi, DSI_RX_FIFO_VC_SIZE, r);
2291 }
2292
dsi_force_tx_stop_mode_io(struct dsi_data * dsi)2293 static int dsi_force_tx_stop_mode_io(struct dsi_data *dsi)
2294 {
2295 u32 r;
2296
2297 r = dsi_read_reg(dsi, DSI_TIMING1);
2298 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2299 dsi_write_reg(dsi, DSI_TIMING1, r);
2300
2301 if (!wait_for_bit_change(dsi, DSI_TIMING1, 15, 0)) {
2302 DSSERR("TX_STOP bit not going down\n");
2303 return -EIO;
2304 }
2305
2306 return 0;
2307 }
2308
dsi_vc_is_enabled(struct dsi_data * dsi,int channel)2309 static bool dsi_vc_is_enabled(struct dsi_data *dsi, int channel)
2310 {
2311 return REG_GET(dsi, DSI_VC_CTRL(channel), 0, 0);
2312 }
2313
dsi_packet_sent_handler_vp(void * data,u32 mask)2314 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
2315 {
2316 struct dsi_packet_sent_handler_data *vp_data =
2317 (struct dsi_packet_sent_handler_data *) data;
2318 struct dsi_data *dsi = vp_data->dsi;
2319 const int channel = dsi->update_channel;
2320 u8 bit = dsi->te_enabled ? 30 : 31;
2321
2322 if (REG_GET(dsi, DSI_VC_TE(channel), bit, bit) == 0)
2323 complete(vp_data->completion);
2324 }
2325
dsi_sync_vc_vp(struct dsi_data * dsi,int channel)2326 static int dsi_sync_vc_vp(struct dsi_data *dsi, int channel)
2327 {
2328 DECLARE_COMPLETION_ONSTACK(completion);
2329 struct dsi_packet_sent_handler_data vp_data = {
2330 .dsi = dsi,
2331 .completion = &completion
2332 };
2333 int r = 0;
2334 u8 bit;
2335
2336 bit = dsi->te_enabled ? 30 : 31;
2337
2338 r = dsi_register_isr_vc(dsi, channel, dsi_packet_sent_handler_vp,
2339 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2340 if (r)
2341 goto err0;
2342
2343 /* Wait for completion only if TE_EN/TE_START is still set */
2344 if (REG_GET(dsi, DSI_VC_TE(channel), bit, bit)) {
2345 if (wait_for_completion_timeout(&completion,
2346 msecs_to_jiffies(10)) == 0) {
2347 DSSERR("Failed to complete previous frame transfer\n");
2348 r = -EIO;
2349 goto err1;
2350 }
2351 }
2352
2353 dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_vp,
2354 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2355
2356 return 0;
2357 err1:
2358 dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_vp,
2359 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2360 err0:
2361 return r;
2362 }
2363
dsi_packet_sent_handler_l4(void * data,u32 mask)2364 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
2365 {
2366 struct dsi_packet_sent_handler_data *l4_data =
2367 (struct dsi_packet_sent_handler_data *) data;
2368 struct dsi_data *dsi = l4_data->dsi;
2369 const int channel = dsi->update_channel;
2370
2371 if (REG_GET(dsi, DSI_VC_CTRL(channel), 5, 5) == 0)
2372 complete(l4_data->completion);
2373 }
2374
dsi_sync_vc_l4(struct dsi_data * dsi,int channel)2375 static int dsi_sync_vc_l4(struct dsi_data *dsi, int channel)
2376 {
2377 DECLARE_COMPLETION_ONSTACK(completion);
2378 struct dsi_packet_sent_handler_data l4_data = {
2379 .dsi = dsi,
2380 .completion = &completion
2381 };
2382 int r = 0;
2383
2384 r = dsi_register_isr_vc(dsi, channel, dsi_packet_sent_handler_l4,
2385 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2386 if (r)
2387 goto err0;
2388
2389 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
2390 if (REG_GET(dsi, DSI_VC_CTRL(channel), 5, 5)) {
2391 if (wait_for_completion_timeout(&completion,
2392 msecs_to_jiffies(10)) == 0) {
2393 DSSERR("Failed to complete previous l4 transfer\n");
2394 r = -EIO;
2395 goto err1;
2396 }
2397 }
2398
2399 dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_l4,
2400 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2401
2402 return 0;
2403 err1:
2404 dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_l4,
2405 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2406 err0:
2407 return r;
2408 }
2409
dsi_sync_vc(struct dsi_data * dsi,int channel)2410 static int dsi_sync_vc(struct dsi_data *dsi, int channel)
2411 {
2412 WARN_ON(!dsi_bus_is_locked(dsi));
2413
2414 WARN_ON(in_interrupt());
2415
2416 if (!dsi_vc_is_enabled(dsi, channel))
2417 return 0;
2418
2419 switch (dsi->vc[channel].source) {
2420 case DSI_VC_SOURCE_VP:
2421 return dsi_sync_vc_vp(dsi, channel);
2422 case DSI_VC_SOURCE_L4:
2423 return dsi_sync_vc_l4(dsi, channel);
2424 default:
2425 BUG();
2426 return -EINVAL;
2427 }
2428 }
2429
dsi_vc_enable(struct dsi_data * dsi,int channel,bool enable)2430 static int dsi_vc_enable(struct dsi_data *dsi, int channel, bool enable)
2431 {
2432 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2433 channel, enable);
2434
2435 enable = enable ? 1 : 0;
2436
2437 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), enable, 0, 0);
2438
2439 if (!wait_for_bit_change(dsi, DSI_VC_CTRL(channel), 0, enable)) {
2440 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2441 return -EIO;
2442 }
2443
2444 return 0;
2445 }
2446
dsi_vc_initial_config(struct dsi_data * dsi,int channel)2447 static void dsi_vc_initial_config(struct dsi_data *dsi, int channel)
2448 {
2449 u32 r;
2450
2451 DSSDBG("Initial config of virtual channel %d", channel);
2452
2453 r = dsi_read_reg(dsi, DSI_VC_CTRL(channel));
2454
2455 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2456 DSSERR("VC(%d) busy when trying to configure it!\n",
2457 channel);
2458
2459 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2460 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2461 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2462 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2463 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2464 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2465 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2466 if (dsi->data->quirks & DSI_QUIRK_VC_OCP_WIDTH)
2467 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
2468
2469 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2470 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2471
2472 dsi_write_reg(dsi, DSI_VC_CTRL(channel), r);
2473
2474 dsi->vc[channel].source = DSI_VC_SOURCE_L4;
2475 }
2476
dsi_vc_config_source(struct dsi_data * dsi,int channel,enum dsi_vc_source source)2477 static int dsi_vc_config_source(struct dsi_data *dsi, int channel,
2478 enum dsi_vc_source source)
2479 {
2480 if (dsi->vc[channel].source == source)
2481 return 0;
2482
2483 DSSDBG("Source config of virtual channel %d", channel);
2484
2485 dsi_sync_vc(dsi, channel);
2486
2487 dsi_vc_enable(dsi, channel, 0);
2488
2489 /* VC_BUSY */
2490 if (!wait_for_bit_change(dsi, DSI_VC_CTRL(channel), 15, 0)) {
2491 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2492 return -EIO;
2493 }
2494
2495 /* SOURCE, 0 = L4, 1 = video port */
2496 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), source, 1, 1);
2497
2498 /* DCS_CMD_ENABLE */
2499 if (dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC) {
2500 bool enable = source == DSI_VC_SOURCE_VP;
2501 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), enable, 30, 30);
2502 }
2503
2504 dsi_vc_enable(dsi, channel, 1);
2505
2506 dsi->vc[channel].source = source;
2507
2508 return 0;
2509 }
2510
dsi_vc_enable_hs(struct omap_dss_device * dssdev,int channel,bool enable)2511 static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
2512 bool enable)
2513 {
2514 struct dsi_data *dsi = to_dsi_data(dssdev);
2515
2516 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2517
2518 WARN_ON(!dsi_bus_is_locked(dsi));
2519
2520 dsi_vc_enable(dsi, channel, 0);
2521 dsi_if_enable(dsi, 0);
2522
2523 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), enable, 9, 9);
2524
2525 dsi_vc_enable(dsi, channel, 1);
2526 dsi_if_enable(dsi, 1);
2527
2528 dsi_force_tx_stop_mode_io(dsi);
2529
2530 /* start the DDR clock by sending a NULL packet */
2531 if (dsi->vm_timings.ddr_clk_always_on && enable)
2532 dsi_vc_send_null(dsi, channel);
2533 }
2534
dsi_vc_flush_long_data(struct dsi_data * dsi,int channel)2535 static void dsi_vc_flush_long_data(struct dsi_data *dsi, int channel)
2536 {
2537 while (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
2538 u32 val;
2539 val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel));
2540 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2541 (val >> 0) & 0xff,
2542 (val >> 8) & 0xff,
2543 (val >> 16) & 0xff,
2544 (val >> 24) & 0xff);
2545 }
2546 }
2547
dsi_show_rx_ack_with_err(u16 err)2548 static void dsi_show_rx_ack_with_err(u16 err)
2549 {
2550 DSSERR("\tACK with ERROR (%#x):\n", err);
2551 if (err & (1 << 0))
2552 DSSERR("\t\tSoT Error\n");
2553 if (err & (1 << 1))
2554 DSSERR("\t\tSoT Sync Error\n");
2555 if (err & (1 << 2))
2556 DSSERR("\t\tEoT Sync Error\n");
2557 if (err & (1 << 3))
2558 DSSERR("\t\tEscape Mode Entry Command Error\n");
2559 if (err & (1 << 4))
2560 DSSERR("\t\tLP Transmit Sync Error\n");
2561 if (err & (1 << 5))
2562 DSSERR("\t\tHS Receive Timeout Error\n");
2563 if (err & (1 << 6))
2564 DSSERR("\t\tFalse Control Error\n");
2565 if (err & (1 << 7))
2566 DSSERR("\t\t(reserved7)\n");
2567 if (err & (1 << 8))
2568 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2569 if (err & (1 << 9))
2570 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2571 if (err & (1 << 10))
2572 DSSERR("\t\tChecksum Error\n");
2573 if (err & (1 << 11))
2574 DSSERR("\t\tData type not recognized\n");
2575 if (err & (1 << 12))
2576 DSSERR("\t\tInvalid VC ID\n");
2577 if (err & (1 << 13))
2578 DSSERR("\t\tInvalid Transmission Length\n");
2579 if (err & (1 << 14))
2580 DSSERR("\t\t(reserved14)\n");
2581 if (err & (1 << 15))
2582 DSSERR("\t\tDSI Protocol Violation\n");
2583 }
2584
dsi_vc_flush_receive_data(struct dsi_data * dsi,int channel)2585 static u16 dsi_vc_flush_receive_data(struct dsi_data *dsi, int channel)
2586 {
2587 /* RX_FIFO_NOT_EMPTY */
2588 while (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
2589 u32 val;
2590 u8 dt;
2591 val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel));
2592 DSSERR("\trawval %#08x\n", val);
2593 dt = FLD_GET(val, 5, 0);
2594 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2595 u16 err = FLD_GET(val, 23, 8);
2596 dsi_show_rx_ack_with_err(err);
2597 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE) {
2598 DSSERR("\tDCS short response, 1 byte: %#x\n",
2599 FLD_GET(val, 23, 8));
2600 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE) {
2601 DSSERR("\tDCS short response, 2 byte: %#x\n",
2602 FLD_GET(val, 23, 8));
2603 } else if (dt == MIPI_DSI_RX_DCS_LONG_READ_RESPONSE) {
2604 DSSERR("\tDCS long response, len %d\n",
2605 FLD_GET(val, 23, 8));
2606 dsi_vc_flush_long_data(dsi, channel);
2607 } else {
2608 DSSERR("\tunknown datatype 0x%02x\n", dt);
2609 }
2610 }
2611 return 0;
2612 }
2613
dsi_vc_send_bta(struct dsi_data * dsi,int channel)2614 static int dsi_vc_send_bta(struct dsi_data *dsi, int channel)
2615 {
2616 if (dsi->debug_write || dsi->debug_read)
2617 DSSDBG("dsi_vc_send_bta %d\n", channel);
2618
2619 WARN_ON(!dsi_bus_is_locked(dsi));
2620
2621 /* RX_FIFO_NOT_EMPTY */
2622 if (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
2623 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2624 dsi_vc_flush_receive_data(dsi, channel);
2625 }
2626
2627 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2628
2629 /* flush posted write */
2630 dsi_read_reg(dsi, DSI_VC_CTRL(channel));
2631
2632 return 0;
2633 }
2634
dsi_vc_send_bta_sync(struct omap_dss_device * dssdev,int channel)2635 static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int channel)
2636 {
2637 struct dsi_data *dsi = to_dsi_data(dssdev);
2638 DECLARE_COMPLETION_ONSTACK(completion);
2639 int r = 0;
2640 u32 err;
2641
2642 r = dsi_register_isr_vc(dsi, channel, dsi_completion_handler,
2643 &completion, DSI_VC_IRQ_BTA);
2644 if (r)
2645 goto err0;
2646
2647 r = dsi_register_isr(dsi, dsi_completion_handler, &completion,
2648 DSI_IRQ_ERROR_MASK);
2649 if (r)
2650 goto err1;
2651
2652 r = dsi_vc_send_bta(dsi, channel);
2653 if (r)
2654 goto err2;
2655
2656 if (wait_for_completion_timeout(&completion,
2657 msecs_to_jiffies(500)) == 0) {
2658 DSSERR("Failed to receive BTA\n");
2659 r = -EIO;
2660 goto err2;
2661 }
2662
2663 err = dsi_get_errors(dsi);
2664 if (err) {
2665 DSSERR("Error while sending BTA: %x\n", err);
2666 r = -EIO;
2667 goto err2;
2668 }
2669 err2:
2670 dsi_unregister_isr(dsi, dsi_completion_handler, &completion,
2671 DSI_IRQ_ERROR_MASK);
2672 err1:
2673 dsi_unregister_isr_vc(dsi, channel, dsi_completion_handler,
2674 &completion, DSI_VC_IRQ_BTA);
2675 err0:
2676 return r;
2677 }
2678
dsi_vc_write_long_header(struct dsi_data * dsi,int channel,u8 data_type,u16 len,u8 ecc)2679 static inline void dsi_vc_write_long_header(struct dsi_data *dsi, int channel,
2680 u8 data_type, u16 len, u8 ecc)
2681 {
2682 u32 val;
2683 u8 data_id;
2684
2685 WARN_ON(!dsi_bus_is_locked(dsi));
2686
2687 data_id = data_type | dsi->vc[channel].vc_id << 6;
2688
2689 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2690 FLD_VAL(ecc, 31, 24);
2691
2692 dsi_write_reg(dsi, DSI_VC_LONG_PACKET_HEADER(channel), val);
2693 }
2694
dsi_vc_write_long_payload(struct dsi_data * dsi,int channel,u8 b1,u8 b2,u8 b3,u8 b4)2695 static inline void dsi_vc_write_long_payload(struct dsi_data *dsi, int channel,
2696 u8 b1, u8 b2, u8 b3, u8 b4)
2697 {
2698 u32 val;
2699
2700 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2701
2702 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2703 b1, b2, b3, b4, val); */
2704
2705 dsi_write_reg(dsi, DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2706 }
2707
dsi_vc_send_long(struct dsi_data * dsi,int channel,u8 data_type,u8 * data,u16 len,u8 ecc)2708 static int dsi_vc_send_long(struct dsi_data *dsi, int channel, u8 data_type,
2709 u8 *data, u16 len, u8 ecc)
2710 {
2711 /*u32 val; */
2712 int i;
2713 u8 *p;
2714 int r = 0;
2715 u8 b1, b2, b3, b4;
2716
2717 if (dsi->debug_write)
2718 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2719
2720 /* len + header */
2721 if (dsi->vc[channel].tx_fifo_size * 32 * 4 < len + 4) {
2722 DSSERR("unable to send long packet: packet too long.\n");
2723 return -EINVAL;
2724 }
2725
2726 dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_L4);
2727
2728 dsi_vc_write_long_header(dsi, channel, data_type, len, ecc);
2729
2730 p = data;
2731 for (i = 0; i < len >> 2; i++) {
2732 if (dsi->debug_write)
2733 DSSDBG("\tsending full packet %d\n", i);
2734
2735 b1 = *p++;
2736 b2 = *p++;
2737 b3 = *p++;
2738 b4 = *p++;
2739
2740 dsi_vc_write_long_payload(dsi, channel, b1, b2, b3, b4);
2741 }
2742
2743 i = len % 4;
2744 if (i) {
2745 b1 = 0; b2 = 0; b3 = 0;
2746
2747 if (dsi->debug_write)
2748 DSSDBG("\tsending remainder bytes %d\n", i);
2749
2750 switch (i) {
2751 case 3:
2752 b1 = *p++;
2753 b2 = *p++;
2754 b3 = *p++;
2755 break;
2756 case 2:
2757 b1 = *p++;
2758 b2 = *p++;
2759 break;
2760 case 1:
2761 b1 = *p++;
2762 break;
2763 }
2764
2765 dsi_vc_write_long_payload(dsi, channel, b1, b2, b3, 0);
2766 }
2767
2768 return r;
2769 }
2770
dsi_vc_send_short(struct dsi_data * dsi,int channel,u8 data_type,u16 data,u8 ecc)2771 static int dsi_vc_send_short(struct dsi_data *dsi, int channel, u8 data_type,
2772 u16 data, u8 ecc)
2773 {
2774 u32 r;
2775 u8 data_id;
2776
2777 WARN_ON(!dsi_bus_is_locked(dsi));
2778
2779 if (dsi->debug_write)
2780 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2781 channel,
2782 data_type, data & 0xff, (data >> 8) & 0xff);
2783
2784 dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_L4);
2785
2786 if (FLD_GET(dsi_read_reg(dsi, DSI_VC_CTRL(channel)), 16, 16)) {
2787 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2788 return -EINVAL;
2789 }
2790
2791 data_id = data_type | dsi->vc[channel].vc_id << 6;
2792
2793 r = (data_id << 0) | (data << 8) | (ecc << 24);
2794
2795 dsi_write_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel), r);
2796
2797 return 0;
2798 }
2799
dsi_vc_send_null(struct dsi_data * dsi,int channel)2800 static int dsi_vc_send_null(struct dsi_data *dsi, int channel)
2801 {
2802 return dsi_vc_send_long(dsi, channel, MIPI_DSI_NULL_PACKET, NULL, 0, 0);
2803 }
2804
dsi_vc_write_nosync_common(struct dsi_data * dsi,int channel,u8 * data,int len,enum dss_dsi_content_type type)2805 static int dsi_vc_write_nosync_common(struct dsi_data *dsi, int channel,
2806 u8 *data, int len,
2807 enum dss_dsi_content_type type)
2808 {
2809 int r;
2810
2811 if (len == 0) {
2812 BUG_ON(type == DSS_DSI_CONTENT_DCS);
2813 r = dsi_vc_send_short(dsi, channel,
2814 MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM, 0, 0);
2815 } else if (len == 1) {
2816 r = dsi_vc_send_short(dsi, channel,
2817 type == DSS_DSI_CONTENT_GENERIC ?
2818 MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM :
2819 MIPI_DSI_DCS_SHORT_WRITE, data[0], 0);
2820 } else if (len == 2) {
2821 r = dsi_vc_send_short(dsi, channel,
2822 type == DSS_DSI_CONTENT_GENERIC ?
2823 MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM :
2824 MIPI_DSI_DCS_SHORT_WRITE_PARAM,
2825 data[0] | (data[1] << 8), 0);
2826 } else {
2827 r = dsi_vc_send_long(dsi, channel,
2828 type == DSS_DSI_CONTENT_GENERIC ?
2829 MIPI_DSI_GENERIC_LONG_WRITE :
2830 MIPI_DSI_DCS_LONG_WRITE, data, len, 0);
2831 }
2832
2833 return r;
2834 }
2835
dsi_vc_dcs_write_nosync(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2836 static int dsi_vc_dcs_write_nosync(struct omap_dss_device *dssdev, int channel,
2837 u8 *data, int len)
2838 {
2839 struct dsi_data *dsi = to_dsi_data(dssdev);
2840
2841 return dsi_vc_write_nosync_common(dsi, channel, data, len,
2842 DSS_DSI_CONTENT_DCS);
2843 }
2844
dsi_vc_generic_write_nosync(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2845 static int dsi_vc_generic_write_nosync(struct omap_dss_device *dssdev, int channel,
2846 u8 *data, int len)
2847 {
2848 struct dsi_data *dsi = to_dsi_data(dssdev);
2849
2850 return dsi_vc_write_nosync_common(dsi, channel, data, len,
2851 DSS_DSI_CONTENT_GENERIC);
2852 }
2853
dsi_vc_write_common(struct omap_dss_device * dssdev,int channel,u8 * data,int len,enum dss_dsi_content_type type)2854 static int dsi_vc_write_common(struct omap_dss_device *dssdev,
2855 int channel, u8 *data, int len,
2856 enum dss_dsi_content_type type)
2857 {
2858 struct dsi_data *dsi = to_dsi_data(dssdev);
2859 int r;
2860
2861 r = dsi_vc_write_nosync_common(dsi, channel, data, len, type);
2862 if (r)
2863 goto err;
2864
2865 r = dsi_vc_send_bta_sync(dssdev, channel);
2866 if (r)
2867 goto err;
2868
2869 /* RX_FIFO_NOT_EMPTY */
2870 if (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
2871 DSSERR("rx fifo not empty after write, dumping data:\n");
2872 dsi_vc_flush_receive_data(dsi, channel);
2873 r = -EIO;
2874 goto err;
2875 }
2876
2877 return 0;
2878 err:
2879 DSSERR("dsi_vc_write_common(ch %d, cmd 0x%02x, len %d) failed\n",
2880 channel, data[0], len);
2881 return r;
2882 }
2883
dsi_vc_dcs_write(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2884 static int dsi_vc_dcs_write(struct omap_dss_device *dssdev, int channel, u8 *data,
2885 int len)
2886 {
2887 return dsi_vc_write_common(dssdev, channel, data, len,
2888 DSS_DSI_CONTENT_DCS);
2889 }
2890
dsi_vc_generic_write(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2891 static int dsi_vc_generic_write(struct omap_dss_device *dssdev, int channel, u8 *data,
2892 int len)
2893 {
2894 return dsi_vc_write_common(dssdev, channel, data, len,
2895 DSS_DSI_CONTENT_GENERIC);
2896 }
2897
dsi_vc_dcs_send_read_request(struct dsi_data * dsi,int channel,u8 dcs_cmd)2898 static int dsi_vc_dcs_send_read_request(struct dsi_data *dsi, int channel,
2899 u8 dcs_cmd)
2900 {
2901 int r;
2902
2903 if (dsi->debug_read)
2904 DSSDBG("dsi_vc_dcs_send_read_request(ch%d, dcs_cmd %x)\n",
2905 channel, dcs_cmd);
2906
2907 r = dsi_vc_send_short(dsi, channel, MIPI_DSI_DCS_READ, dcs_cmd, 0);
2908 if (r) {
2909 DSSERR("dsi_vc_dcs_send_read_request(ch %d, cmd 0x%02x)"
2910 " failed\n", channel, dcs_cmd);
2911 return r;
2912 }
2913
2914 return 0;
2915 }
2916
dsi_vc_generic_send_read_request(struct dsi_data * dsi,int channel,u8 * reqdata,int reqlen)2917 static int dsi_vc_generic_send_read_request(struct dsi_data *dsi, int channel,
2918 u8 *reqdata, int reqlen)
2919 {
2920 u16 data;
2921 u8 data_type;
2922 int r;
2923
2924 if (dsi->debug_read)
2925 DSSDBG("dsi_vc_generic_send_read_request(ch %d, reqlen %d)\n",
2926 channel, reqlen);
2927
2928 if (reqlen == 0) {
2929 data_type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM;
2930 data = 0;
2931 } else if (reqlen == 1) {
2932 data_type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM;
2933 data = reqdata[0];
2934 } else if (reqlen == 2) {
2935 data_type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM;
2936 data = reqdata[0] | (reqdata[1] << 8);
2937 } else {
2938 BUG();
2939 return -EINVAL;
2940 }
2941
2942 r = dsi_vc_send_short(dsi, channel, data_type, data, 0);
2943 if (r) {
2944 DSSERR("dsi_vc_generic_send_read_request(ch %d, reqlen %d)"
2945 " failed\n", channel, reqlen);
2946 return r;
2947 }
2948
2949 return 0;
2950 }
2951
dsi_vc_read_rx_fifo(struct dsi_data * dsi,int channel,u8 * buf,int buflen,enum dss_dsi_content_type type)2952 static int dsi_vc_read_rx_fifo(struct dsi_data *dsi, int channel, u8 *buf,
2953 int buflen, enum dss_dsi_content_type type)
2954 {
2955 u32 val;
2956 u8 dt;
2957 int r;
2958
2959 /* RX_FIFO_NOT_EMPTY */
2960 if (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20) == 0) {
2961 DSSERR("RX fifo empty when trying to read.\n");
2962 r = -EIO;
2963 goto err;
2964 }
2965
2966 val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel));
2967 if (dsi->debug_read)
2968 DSSDBG("\theader: %08x\n", val);
2969 dt = FLD_GET(val, 5, 0);
2970 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2971 u16 err = FLD_GET(val, 23, 8);
2972 dsi_show_rx_ack_with_err(err);
2973 r = -EIO;
2974 goto err;
2975
2976 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2977 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE :
2978 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE)) {
2979 u8 data = FLD_GET(val, 15, 8);
2980 if (dsi->debug_read)
2981 DSSDBG("\t%s short response, 1 byte: %02x\n",
2982 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2983 "DCS", data);
2984
2985 if (buflen < 1) {
2986 r = -EIO;
2987 goto err;
2988 }
2989
2990 buf[0] = data;
2991
2992 return 1;
2993 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2994 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE :
2995 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE)) {
2996 u16 data = FLD_GET(val, 23, 8);
2997 if (dsi->debug_read)
2998 DSSDBG("\t%s short response, 2 byte: %04x\n",
2999 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
3000 "DCS", data);
3001
3002 if (buflen < 2) {
3003 r = -EIO;
3004 goto err;
3005 }
3006
3007 buf[0] = data & 0xff;
3008 buf[1] = (data >> 8) & 0xff;
3009
3010 return 2;
3011 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
3012 MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE :
3013 MIPI_DSI_RX_DCS_LONG_READ_RESPONSE)) {
3014 int w;
3015 int len = FLD_GET(val, 23, 8);
3016 if (dsi->debug_read)
3017 DSSDBG("\t%s long response, len %d\n",
3018 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
3019 "DCS", len);
3020
3021 if (len > buflen) {
3022 r = -EIO;
3023 goto err;
3024 }
3025
3026 /* two byte checksum ends the packet, not included in len */
3027 for (w = 0; w < len + 2;) {
3028 int b;
3029 val = dsi_read_reg(dsi,
3030 DSI_VC_SHORT_PACKET_HEADER(channel));
3031 if (dsi->debug_read)
3032 DSSDBG("\t\t%02x %02x %02x %02x\n",
3033 (val >> 0) & 0xff,
3034 (val >> 8) & 0xff,
3035 (val >> 16) & 0xff,
3036 (val >> 24) & 0xff);
3037
3038 for (b = 0; b < 4; ++b) {
3039 if (w < len)
3040 buf[w] = (val >> (b * 8)) & 0xff;
3041 /* we discard the 2 byte checksum */
3042 ++w;
3043 }
3044 }
3045
3046 return len;
3047 } else {
3048 DSSERR("\tunknown datatype 0x%02x\n", dt);
3049 r = -EIO;
3050 goto err;
3051 }
3052
3053 err:
3054 DSSERR("dsi_vc_read_rx_fifo(ch %d type %s) failed\n", channel,
3055 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : "DCS");
3056
3057 return r;
3058 }
3059
dsi_vc_dcs_read(struct omap_dss_device * dssdev,int channel,u8 dcs_cmd,u8 * buf,int buflen)3060 static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3061 u8 *buf, int buflen)
3062 {
3063 struct dsi_data *dsi = to_dsi_data(dssdev);
3064 int r;
3065
3066 r = dsi_vc_dcs_send_read_request(dsi, channel, dcs_cmd);
3067 if (r)
3068 goto err;
3069
3070 r = dsi_vc_send_bta_sync(dssdev, channel);
3071 if (r)
3072 goto err;
3073
3074 r = dsi_vc_read_rx_fifo(dsi, channel, buf, buflen,
3075 DSS_DSI_CONTENT_DCS);
3076 if (r < 0)
3077 goto err;
3078
3079 if (r != buflen) {
3080 r = -EIO;
3081 goto err;
3082 }
3083
3084 return 0;
3085 err:
3086 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n", channel, dcs_cmd);
3087 return r;
3088 }
3089
dsi_vc_generic_read(struct omap_dss_device * dssdev,int channel,u8 * reqdata,int reqlen,u8 * buf,int buflen)3090 static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int channel,
3091 u8 *reqdata, int reqlen, u8 *buf, int buflen)
3092 {
3093 struct dsi_data *dsi = to_dsi_data(dssdev);
3094 int r;
3095
3096 r = dsi_vc_generic_send_read_request(dsi, channel, reqdata, reqlen);
3097 if (r)
3098 return r;
3099
3100 r = dsi_vc_send_bta_sync(dssdev, channel);
3101 if (r)
3102 return r;
3103
3104 r = dsi_vc_read_rx_fifo(dsi, channel, buf, buflen,
3105 DSS_DSI_CONTENT_GENERIC);
3106 if (r < 0)
3107 return r;
3108
3109 if (r != buflen) {
3110 r = -EIO;
3111 return r;
3112 }
3113
3114 return 0;
3115 }
3116
dsi_vc_set_max_rx_packet_size(struct omap_dss_device * dssdev,int channel,u16 len)3117 static int dsi_vc_set_max_rx_packet_size(struct omap_dss_device *dssdev, int channel,
3118 u16 len)
3119 {
3120 struct dsi_data *dsi = to_dsi_data(dssdev);
3121
3122 return dsi_vc_send_short(dsi, channel,
3123 MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, len, 0);
3124 }
3125
dsi_enter_ulps(struct dsi_data * dsi)3126 static int dsi_enter_ulps(struct dsi_data *dsi)
3127 {
3128 DECLARE_COMPLETION_ONSTACK(completion);
3129 int r, i;
3130 unsigned int mask;
3131
3132 DSSDBG("Entering ULPS");
3133
3134 WARN_ON(!dsi_bus_is_locked(dsi));
3135
3136 WARN_ON(dsi->ulps_enabled);
3137
3138 if (dsi->ulps_enabled)
3139 return 0;
3140
3141 /* DDR_CLK_ALWAYS_ON */
3142 if (REG_GET(dsi, DSI_CLK_CTRL, 13, 13)) {
3143 dsi_if_enable(dsi, 0);
3144 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 13, 13);
3145 dsi_if_enable(dsi, 1);
3146 }
3147
3148 dsi_sync_vc(dsi, 0);
3149 dsi_sync_vc(dsi, 1);
3150 dsi_sync_vc(dsi, 2);
3151 dsi_sync_vc(dsi, 3);
3152
3153 dsi_force_tx_stop_mode_io(dsi);
3154
3155 dsi_vc_enable(dsi, 0, false);
3156 dsi_vc_enable(dsi, 1, false);
3157 dsi_vc_enable(dsi, 2, false);
3158 dsi_vc_enable(dsi, 3, false);
3159
3160 if (REG_GET(dsi, DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */
3161 DSSERR("HS busy when enabling ULPS\n");
3162 return -EIO;
3163 }
3164
3165 if (REG_GET(dsi, DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */
3166 DSSERR("LP busy when enabling ULPS\n");
3167 return -EIO;
3168 }
3169
3170 r = dsi_register_isr_cio(dsi, dsi_completion_handler, &completion,
3171 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3172 if (r)
3173 return r;
3174
3175 mask = 0;
3176
3177 for (i = 0; i < dsi->num_lanes_supported; ++i) {
3178 if (dsi->lanes[i].function == DSI_LANE_UNUSED)
3179 continue;
3180 mask |= 1 << i;
3181 }
3182 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */
3183 /* LANEx_ULPS_SIG2 */
3184 REG_FLD_MOD(dsi, DSI_COMPLEXIO_CFG2, mask, 9, 5);
3185
3186 /* flush posted write and wait for SCP interface to finish the write */
3187 dsi_read_reg(dsi, DSI_COMPLEXIO_CFG2);
3188
3189 if (wait_for_completion_timeout(&completion,
3190 msecs_to_jiffies(1000)) == 0) {
3191 DSSERR("ULPS enable timeout\n");
3192 r = -EIO;
3193 goto err;
3194 }
3195
3196 dsi_unregister_isr_cio(dsi, dsi_completion_handler, &completion,
3197 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3198
3199 /* Reset LANEx_ULPS_SIG2 */
3200 REG_FLD_MOD(dsi, DSI_COMPLEXIO_CFG2, 0, 9, 5);
3201
3202 /* flush posted write and wait for SCP interface to finish the write */
3203 dsi_read_reg(dsi, DSI_COMPLEXIO_CFG2);
3204
3205 dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_ULPS);
3206
3207 dsi_if_enable(dsi, false);
3208
3209 dsi->ulps_enabled = true;
3210
3211 return 0;
3212
3213 err:
3214 dsi_unregister_isr_cio(dsi, dsi_completion_handler, &completion,
3215 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3216 return r;
3217 }
3218
dsi_set_lp_rx_timeout(struct dsi_data * dsi,unsigned int ticks,bool x4,bool x16)3219 static void dsi_set_lp_rx_timeout(struct dsi_data *dsi, unsigned int ticks,
3220 bool x4, bool x16)
3221 {
3222 unsigned long fck;
3223 unsigned long total_ticks;
3224 u32 r;
3225
3226 BUG_ON(ticks > 0x1fff);
3227
3228 /* ticks in DSI_FCK */
3229 fck = dsi_fclk_rate(dsi);
3230
3231 r = dsi_read_reg(dsi, DSI_TIMING2);
3232 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
3233 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
3234 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
3235 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
3236 dsi_write_reg(dsi, DSI_TIMING2, r);
3237
3238 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3239
3240 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3241 total_ticks,
3242 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3243 (total_ticks * 1000) / (fck / 1000 / 1000));
3244 }
3245
dsi_set_ta_timeout(struct dsi_data * dsi,unsigned int ticks,bool x8,bool x16)3246 static void dsi_set_ta_timeout(struct dsi_data *dsi, unsigned int ticks,
3247 bool x8, bool x16)
3248 {
3249 unsigned long fck;
3250 unsigned long total_ticks;
3251 u32 r;
3252
3253 BUG_ON(ticks > 0x1fff);
3254
3255 /* ticks in DSI_FCK */
3256 fck = dsi_fclk_rate(dsi);
3257
3258 r = dsi_read_reg(dsi, DSI_TIMING1);
3259 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
3260 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
3261 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
3262 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
3263 dsi_write_reg(dsi, DSI_TIMING1, r);
3264
3265 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
3266
3267 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
3268 total_ticks,
3269 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
3270 (total_ticks * 1000) / (fck / 1000 / 1000));
3271 }
3272
dsi_set_stop_state_counter(struct dsi_data * dsi,unsigned int ticks,bool x4,bool x16)3273 static void dsi_set_stop_state_counter(struct dsi_data *dsi, unsigned int ticks,
3274 bool x4, bool x16)
3275 {
3276 unsigned long fck;
3277 unsigned long total_ticks;
3278 u32 r;
3279
3280 BUG_ON(ticks > 0x1fff);
3281
3282 /* ticks in DSI_FCK */
3283 fck = dsi_fclk_rate(dsi);
3284
3285 r = dsi_read_reg(dsi, DSI_TIMING1);
3286 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
3287 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
3288 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
3289 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
3290 dsi_write_reg(dsi, DSI_TIMING1, r);
3291
3292 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3293
3294 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
3295 total_ticks,
3296 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3297 (total_ticks * 1000) / (fck / 1000 / 1000));
3298 }
3299
dsi_set_hs_tx_timeout(struct dsi_data * dsi,unsigned int ticks,bool x4,bool x16)3300 static void dsi_set_hs_tx_timeout(struct dsi_data *dsi, unsigned int ticks,
3301 bool x4, bool x16)
3302 {
3303 unsigned long fck;
3304 unsigned long total_ticks;
3305 u32 r;
3306
3307 BUG_ON(ticks > 0x1fff);
3308
3309 /* ticks in TxByteClkHS */
3310 fck = dsi_get_txbyteclkhs(dsi);
3311
3312 r = dsi_read_reg(dsi, DSI_TIMING2);
3313 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
3314 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
3315 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
3316 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
3317 dsi_write_reg(dsi, DSI_TIMING2, r);
3318
3319 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3320
3321 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3322 total_ticks,
3323 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3324 (total_ticks * 1000) / (fck / 1000 / 1000));
3325 }
3326
dsi_config_vp_num_line_buffers(struct dsi_data * dsi)3327 static void dsi_config_vp_num_line_buffers(struct dsi_data *dsi)
3328 {
3329 int num_line_buffers;
3330
3331 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3332 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3333 struct videomode *vm = &dsi->vm;
3334 /*
3335 * Don't use line buffers if width is greater than the video
3336 * port's line buffer size
3337 */
3338 if (dsi->line_buffer_size <= vm->hactive * bpp / 8)
3339 num_line_buffers = 0;
3340 else
3341 num_line_buffers = 2;
3342 } else {
3343 /* Use maximum number of line buffers in command mode */
3344 num_line_buffers = 2;
3345 }
3346
3347 /* LINE_BUFFER */
3348 REG_FLD_MOD(dsi, DSI_CTRL, num_line_buffers, 13, 12);
3349 }
3350
dsi_config_vp_sync_events(struct dsi_data * dsi)3351 static void dsi_config_vp_sync_events(struct dsi_data *dsi)
3352 {
3353 bool sync_end;
3354 u32 r;
3355
3356 if (dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE)
3357 sync_end = true;
3358 else
3359 sync_end = false;
3360
3361 r = dsi_read_reg(dsi, DSI_CTRL);
3362 r = FLD_MOD(r, 1, 9, 9); /* VP_DE_POL */
3363 r = FLD_MOD(r, 1, 10, 10); /* VP_HSYNC_POL */
3364 r = FLD_MOD(r, 1, 11, 11); /* VP_VSYNC_POL */
3365 r = FLD_MOD(r, 1, 15, 15); /* VP_VSYNC_START */
3366 r = FLD_MOD(r, sync_end, 16, 16); /* VP_VSYNC_END */
3367 r = FLD_MOD(r, 1, 17, 17); /* VP_HSYNC_START */
3368 r = FLD_MOD(r, sync_end, 18, 18); /* VP_HSYNC_END */
3369 dsi_write_reg(dsi, DSI_CTRL, r);
3370 }
3371
dsi_config_blanking_modes(struct dsi_data * dsi)3372 static void dsi_config_blanking_modes(struct dsi_data *dsi)
3373 {
3374 int blanking_mode = dsi->vm_timings.blanking_mode;
3375 int hfp_blanking_mode = dsi->vm_timings.hfp_blanking_mode;
3376 int hbp_blanking_mode = dsi->vm_timings.hbp_blanking_mode;
3377 int hsa_blanking_mode = dsi->vm_timings.hsa_blanking_mode;
3378 u32 r;
3379
3380 /*
3381 * 0 = TX FIFO packets sent or LPS in corresponding blanking periods
3382 * 1 = Long blanking packets are sent in corresponding blanking periods
3383 */
3384 r = dsi_read_reg(dsi, DSI_CTRL);
3385 r = FLD_MOD(r, blanking_mode, 20, 20); /* BLANKING_MODE */
3386 r = FLD_MOD(r, hfp_blanking_mode, 21, 21); /* HFP_BLANKING */
3387 r = FLD_MOD(r, hbp_blanking_mode, 22, 22); /* HBP_BLANKING */
3388 r = FLD_MOD(r, hsa_blanking_mode, 23, 23); /* HSA_BLANKING */
3389 dsi_write_reg(dsi, DSI_CTRL, r);
3390 }
3391
3392 /*
3393 * According to section 'HS Command Mode Interleaving' in OMAP TRM, Scenario 3
3394 * results in maximum transition time for data and clock lanes to enter and
3395 * exit HS mode. Hence, this is the scenario where the least amount of command
3396 * mode data can be interleaved. We program the minimum amount of TXBYTECLKHS
3397 * clock cycles that can be used to interleave command mode data in HS so that
3398 * all scenarios are satisfied.
3399 */
dsi_compute_interleave_hs(int blank,bool ddr_alwon,int enter_hs,int exit_hs,int exiths_clk,int ddr_pre,int ddr_post)3400 static int dsi_compute_interleave_hs(int blank, bool ddr_alwon, int enter_hs,
3401 int exit_hs, int exiths_clk, int ddr_pre, int ddr_post)
3402 {
3403 int transition;
3404
3405 /*
3406 * If DDR_CLK_ALWAYS_ON is set, we need to consider HS mode transition
3407 * time of data lanes only, if it isn't set, we need to consider HS
3408 * transition time of both data and clock lanes. HS transition time
3409 * of Scenario 3 is considered.
3410 */
3411 if (ddr_alwon) {
3412 transition = enter_hs + exit_hs + max(enter_hs, 2) + 1;
3413 } else {
3414 int trans1, trans2;
3415 trans1 = ddr_pre + enter_hs + exit_hs + max(enter_hs, 2) + 1;
3416 trans2 = ddr_pre + enter_hs + exiths_clk + ddr_post + ddr_pre +
3417 enter_hs + 1;
3418 transition = max(trans1, trans2);
3419 }
3420
3421 return blank > transition ? blank - transition : 0;
3422 }
3423
3424 /*
3425 * According to section 'LP Command Mode Interleaving' in OMAP TRM, Scenario 1
3426 * results in maximum transition time for data lanes to enter and exit LP mode.
3427 * Hence, this is the scenario where the least amount of command mode data can
3428 * be interleaved. We program the minimum amount of bytes that can be
3429 * interleaved in LP so that all scenarios are satisfied.
3430 */
dsi_compute_interleave_lp(int blank,int enter_hs,int exit_hs,int lp_clk_div,int tdsi_fclk)3431 static int dsi_compute_interleave_lp(int blank, int enter_hs, int exit_hs,
3432 int lp_clk_div, int tdsi_fclk)
3433 {
3434 int trans_lp; /* time required for a LP transition, in TXBYTECLKHS */
3435 int tlp_avail; /* time left for interleaving commands, in CLKIN4DDR */
3436 int ttxclkesc; /* period of LP transmit escape clock, in CLKIN4DDR */
3437 int thsbyte_clk = 16; /* Period of TXBYTECLKHS clock, in CLKIN4DDR */
3438 int lp_inter; /* cmd mode data that can be interleaved, in bytes */
3439
3440 /* maximum LP transition time according to Scenario 1 */
3441 trans_lp = exit_hs + max(enter_hs, 2) + 1;
3442
3443 /* CLKIN4DDR = 16 * TXBYTECLKHS */
3444 tlp_avail = thsbyte_clk * (blank - trans_lp);
3445
3446 ttxclkesc = tdsi_fclk * lp_clk_div;
3447
3448 lp_inter = ((tlp_avail - 8 * thsbyte_clk - 5 * tdsi_fclk) / ttxclkesc -
3449 26) / 16;
3450
3451 return max(lp_inter, 0);
3452 }
3453
dsi_config_cmd_mode_interleaving(struct dsi_data * dsi)3454 static void dsi_config_cmd_mode_interleaving(struct dsi_data *dsi)
3455 {
3456 int blanking_mode;
3457 int hfp_blanking_mode, hbp_blanking_mode, hsa_blanking_mode;
3458 int hsa, hfp, hbp, width_bytes, bllp, lp_clk_div;
3459 int ddr_clk_pre, ddr_clk_post, enter_hs_mode_lat, exit_hs_mode_lat;
3460 int tclk_trail, ths_exit, exiths_clk;
3461 bool ddr_alwon;
3462 struct videomode *vm = &dsi->vm;
3463 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3464 int ndl = dsi->num_lanes_used - 1;
3465 int dsi_fclk_hsdiv = dsi->user_dsi_cinfo.mX[HSDIV_DSI] + 1;
3466 int hsa_interleave_hs = 0, hsa_interleave_lp = 0;
3467 int hfp_interleave_hs = 0, hfp_interleave_lp = 0;
3468 int hbp_interleave_hs = 0, hbp_interleave_lp = 0;
3469 int bl_interleave_hs = 0, bl_interleave_lp = 0;
3470 u32 r;
3471
3472 r = dsi_read_reg(dsi, DSI_CTRL);
3473 blanking_mode = FLD_GET(r, 20, 20);
3474 hfp_blanking_mode = FLD_GET(r, 21, 21);
3475 hbp_blanking_mode = FLD_GET(r, 22, 22);
3476 hsa_blanking_mode = FLD_GET(r, 23, 23);
3477
3478 r = dsi_read_reg(dsi, DSI_VM_TIMING1);
3479 hbp = FLD_GET(r, 11, 0);
3480 hfp = FLD_GET(r, 23, 12);
3481 hsa = FLD_GET(r, 31, 24);
3482
3483 r = dsi_read_reg(dsi, DSI_CLK_TIMING);
3484 ddr_clk_post = FLD_GET(r, 7, 0);
3485 ddr_clk_pre = FLD_GET(r, 15, 8);
3486
3487 r = dsi_read_reg(dsi, DSI_VM_TIMING7);
3488 exit_hs_mode_lat = FLD_GET(r, 15, 0);
3489 enter_hs_mode_lat = FLD_GET(r, 31, 16);
3490
3491 r = dsi_read_reg(dsi, DSI_CLK_CTRL);
3492 lp_clk_div = FLD_GET(r, 12, 0);
3493 ddr_alwon = FLD_GET(r, 13, 13);
3494
3495 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG0);
3496 ths_exit = FLD_GET(r, 7, 0);
3497
3498 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG1);
3499 tclk_trail = FLD_GET(r, 15, 8);
3500
3501 exiths_clk = ths_exit + tclk_trail;
3502
3503 width_bytes = DIV_ROUND_UP(vm->hactive * bpp, 8);
3504 bllp = hbp + hfp + hsa + DIV_ROUND_UP(width_bytes + 6, ndl);
3505
3506 if (!hsa_blanking_mode) {
3507 hsa_interleave_hs = dsi_compute_interleave_hs(hsa, ddr_alwon,
3508 enter_hs_mode_lat, exit_hs_mode_lat,
3509 exiths_clk, ddr_clk_pre, ddr_clk_post);
3510 hsa_interleave_lp = dsi_compute_interleave_lp(hsa,
3511 enter_hs_mode_lat, exit_hs_mode_lat,
3512 lp_clk_div, dsi_fclk_hsdiv);
3513 }
3514
3515 if (!hfp_blanking_mode) {
3516 hfp_interleave_hs = dsi_compute_interleave_hs(hfp, ddr_alwon,
3517 enter_hs_mode_lat, exit_hs_mode_lat,
3518 exiths_clk, ddr_clk_pre, ddr_clk_post);
3519 hfp_interleave_lp = dsi_compute_interleave_lp(hfp,
3520 enter_hs_mode_lat, exit_hs_mode_lat,
3521 lp_clk_div, dsi_fclk_hsdiv);
3522 }
3523
3524 if (!hbp_blanking_mode) {
3525 hbp_interleave_hs = dsi_compute_interleave_hs(hbp, ddr_alwon,
3526 enter_hs_mode_lat, exit_hs_mode_lat,
3527 exiths_clk, ddr_clk_pre, ddr_clk_post);
3528
3529 hbp_interleave_lp = dsi_compute_interleave_lp(hbp,
3530 enter_hs_mode_lat, exit_hs_mode_lat,
3531 lp_clk_div, dsi_fclk_hsdiv);
3532 }
3533
3534 if (!blanking_mode) {
3535 bl_interleave_hs = dsi_compute_interleave_hs(bllp, ddr_alwon,
3536 enter_hs_mode_lat, exit_hs_mode_lat,
3537 exiths_clk, ddr_clk_pre, ddr_clk_post);
3538
3539 bl_interleave_lp = dsi_compute_interleave_lp(bllp,
3540 enter_hs_mode_lat, exit_hs_mode_lat,
3541 lp_clk_div, dsi_fclk_hsdiv);
3542 }
3543
3544 DSSDBG("DSI HS interleaving(TXBYTECLKHS) HSA %d, HFP %d, HBP %d, BLLP %d\n",
3545 hsa_interleave_hs, hfp_interleave_hs, hbp_interleave_hs,
3546 bl_interleave_hs);
3547
3548 DSSDBG("DSI LP interleaving(bytes) HSA %d, HFP %d, HBP %d, BLLP %d\n",
3549 hsa_interleave_lp, hfp_interleave_lp, hbp_interleave_lp,
3550 bl_interleave_lp);
3551
3552 r = dsi_read_reg(dsi, DSI_VM_TIMING4);
3553 r = FLD_MOD(r, hsa_interleave_hs, 23, 16);
3554 r = FLD_MOD(r, hfp_interleave_hs, 15, 8);
3555 r = FLD_MOD(r, hbp_interleave_hs, 7, 0);
3556 dsi_write_reg(dsi, DSI_VM_TIMING4, r);
3557
3558 r = dsi_read_reg(dsi, DSI_VM_TIMING5);
3559 r = FLD_MOD(r, hsa_interleave_lp, 23, 16);
3560 r = FLD_MOD(r, hfp_interleave_lp, 15, 8);
3561 r = FLD_MOD(r, hbp_interleave_lp, 7, 0);
3562 dsi_write_reg(dsi, DSI_VM_TIMING5, r);
3563
3564 r = dsi_read_reg(dsi, DSI_VM_TIMING6);
3565 r = FLD_MOD(r, bl_interleave_hs, 31, 15);
3566 r = FLD_MOD(r, bl_interleave_lp, 16, 0);
3567 dsi_write_reg(dsi, DSI_VM_TIMING6, r);
3568 }
3569
dsi_proto_config(struct dsi_data * dsi)3570 static int dsi_proto_config(struct dsi_data *dsi)
3571 {
3572 u32 r;
3573 int buswidth = 0;
3574
3575 dsi_config_tx_fifo(dsi, DSI_FIFO_SIZE_32,
3576 DSI_FIFO_SIZE_32,
3577 DSI_FIFO_SIZE_32,
3578 DSI_FIFO_SIZE_32);
3579
3580 dsi_config_rx_fifo(dsi, DSI_FIFO_SIZE_32,
3581 DSI_FIFO_SIZE_32,
3582 DSI_FIFO_SIZE_32,
3583 DSI_FIFO_SIZE_32);
3584
3585 /* XXX what values for the timeouts? */
3586 dsi_set_stop_state_counter(dsi, 0x1000, false, false);
3587 dsi_set_ta_timeout(dsi, 0x1fff, true, true);
3588 dsi_set_lp_rx_timeout(dsi, 0x1fff, true, true);
3589 dsi_set_hs_tx_timeout(dsi, 0x1fff, true, true);
3590
3591 switch (dsi_get_pixel_size(dsi->pix_fmt)) {
3592 case 16:
3593 buswidth = 0;
3594 break;
3595 case 18:
3596 buswidth = 1;
3597 break;
3598 case 24:
3599 buswidth = 2;
3600 break;
3601 default:
3602 BUG();
3603 return -EINVAL;
3604 }
3605
3606 r = dsi_read_reg(dsi, DSI_CTRL);
3607 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
3608 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
3609 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
3610 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
3611 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
3612 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
3613 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
3614 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
3615 if (!(dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC)) {
3616 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
3617 /* DCS_CMD_CODE, 1=start, 0=continue */
3618 r = FLD_MOD(r, 0, 25, 25);
3619 }
3620
3621 dsi_write_reg(dsi, DSI_CTRL, r);
3622
3623 dsi_config_vp_num_line_buffers(dsi);
3624
3625 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3626 dsi_config_vp_sync_events(dsi);
3627 dsi_config_blanking_modes(dsi);
3628 dsi_config_cmd_mode_interleaving(dsi);
3629 }
3630
3631 dsi_vc_initial_config(dsi, 0);
3632 dsi_vc_initial_config(dsi, 1);
3633 dsi_vc_initial_config(dsi, 2);
3634 dsi_vc_initial_config(dsi, 3);
3635
3636 return 0;
3637 }
3638
dsi_proto_timings(struct dsi_data * dsi)3639 static void dsi_proto_timings(struct dsi_data *dsi)
3640 {
3641 unsigned int tlpx, tclk_zero, tclk_prepare, tclk_trail;
3642 unsigned int tclk_pre, tclk_post;
3643 unsigned int ths_prepare, ths_prepare_ths_zero, ths_zero;
3644 unsigned int ths_trail, ths_exit;
3645 unsigned int ddr_clk_pre, ddr_clk_post;
3646 unsigned int enter_hs_mode_lat, exit_hs_mode_lat;
3647 unsigned int ths_eot;
3648 int ndl = dsi->num_lanes_used - 1;
3649 u32 r;
3650
3651 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG0);
3652 ths_prepare = FLD_GET(r, 31, 24);
3653 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
3654 ths_zero = ths_prepare_ths_zero - ths_prepare;
3655 ths_trail = FLD_GET(r, 15, 8);
3656 ths_exit = FLD_GET(r, 7, 0);
3657
3658 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG1);
3659 tlpx = FLD_GET(r, 20, 16) * 2;
3660 tclk_trail = FLD_GET(r, 15, 8);
3661 tclk_zero = FLD_GET(r, 7, 0);
3662
3663 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG2);
3664 tclk_prepare = FLD_GET(r, 7, 0);
3665
3666 /* min 8*UI */
3667 tclk_pre = 20;
3668 /* min 60ns + 52*UI */
3669 tclk_post = ns2ddr(dsi, 60) + 26;
3670
3671 ths_eot = DIV_ROUND_UP(4, ndl);
3672
3673 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
3674 4);
3675 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
3676
3677 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
3678 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
3679
3680 r = dsi_read_reg(dsi, DSI_CLK_TIMING);
3681 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
3682 r = FLD_MOD(r, ddr_clk_post, 7, 0);
3683 dsi_write_reg(dsi, DSI_CLK_TIMING, r);
3684
3685 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
3686 ddr_clk_pre,
3687 ddr_clk_post);
3688
3689 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
3690 DIV_ROUND_UP(ths_prepare, 4) +
3691 DIV_ROUND_UP(ths_zero + 3, 4);
3692
3693 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
3694
3695 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
3696 FLD_VAL(exit_hs_mode_lat, 15, 0);
3697 dsi_write_reg(dsi, DSI_VM_TIMING7, r);
3698
3699 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
3700 enter_hs_mode_lat, exit_hs_mode_lat);
3701
3702 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3703 /* TODO: Implement a video mode check_timings function */
3704 int hsa = dsi->vm_timings.hsa;
3705 int hfp = dsi->vm_timings.hfp;
3706 int hbp = dsi->vm_timings.hbp;
3707 int vsa = dsi->vm_timings.vsa;
3708 int vfp = dsi->vm_timings.vfp;
3709 int vbp = dsi->vm_timings.vbp;
3710 int window_sync = dsi->vm_timings.window_sync;
3711 bool hsync_end;
3712 struct videomode *vm = &dsi->vm;
3713 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3714 int tl, t_he, width_bytes;
3715
3716 hsync_end = dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE;
3717 t_he = hsync_end ?
3718 ((hsa == 0 && ndl == 3) ? 1 : DIV_ROUND_UP(4, ndl)) : 0;
3719
3720 width_bytes = DIV_ROUND_UP(vm->hactive * bpp, 8);
3721
3722 /* TL = t_HS + HSA + t_HE + HFP + ceil((WC + 6) / NDL) + HBP */
3723 tl = DIV_ROUND_UP(4, ndl) + (hsync_end ? hsa : 0) + t_he + hfp +
3724 DIV_ROUND_UP(width_bytes + 6, ndl) + hbp;
3725
3726 DSSDBG("HBP: %d, HFP: %d, HSA: %d, TL: %d TXBYTECLKHS\n", hbp,
3727 hfp, hsync_end ? hsa : 0, tl);
3728 DSSDBG("VBP: %d, VFP: %d, VSA: %d, VACT: %d lines\n", vbp, vfp,
3729 vsa, vm->vactive);
3730
3731 r = dsi_read_reg(dsi, DSI_VM_TIMING1);
3732 r = FLD_MOD(r, hbp, 11, 0); /* HBP */
3733 r = FLD_MOD(r, hfp, 23, 12); /* HFP */
3734 r = FLD_MOD(r, hsync_end ? hsa : 0, 31, 24); /* HSA */
3735 dsi_write_reg(dsi, DSI_VM_TIMING1, r);
3736
3737 r = dsi_read_reg(dsi, DSI_VM_TIMING2);
3738 r = FLD_MOD(r, vbp, 7, 0); /* VBP */
3739 r = FLD_MOD(r, vfp, 15, 8); /* VFP */
3740 r = FLD_MOD(r, vsa, 23, 16); /* VSA */
3741 r = FLD_MOD(r, window_sync, 27, 24); /* WINDOW_SYNC */
3742 dsi_write_reg(dsi, DSI_VM_TIMING2, r);
3743
3744 r = dsi_read_reg(dsi, DSI_VM_TIMING3);
3745 r = FLD_MOD(r, vm->vactive, 14, 0); /* VACT */
3746 r = FLD_MOD(r, tl, 31, 16); /* TL */
3747 dsi_write_reg(dsi, DSI_VM_TIMING3, r);
3748 }
3749 }
3750
dsi_configure_pins(struct omap_dss_device * dssdev,const struct omap_dsi_pin_config * pin_cfg)3751 static int dsi_configure_pins(struct omap_dss_device *dssdev,
3752 const struct omap_dsi_pin_config *pin_cfg)
3753 {
3754 struct dsi_data *dsi = to_dsi_data(dssdev);
3755 int num_pins;
3756 const int *pins;
3757 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
3758 int num_lanes;
3759 int i;
3760
3761 static const enum dsi_lane_function functions[] = {
3762 DSI_LANE_CLK,
3763 DSI_LANE_DATA1,
3764 DSI_LANE_DATA2,
3765 DSI_LANE_DATA3,
3766 DSI_LANE_DATA4,
3767 };
3768
3769 num_pins = pin_cfg->num_pins;
3770 pins = pin_cfg->pins;
3771
3772 if (num_pins < 4 || num_pins > dsi->num_lanes_supported * 2
3773 || num_pins % 2 != 0)
3774 return -EINVAL;
3775
3776 for (i = 0; i < DSI_MAX_NR_LANES; ++i)
3777 lanes[i].function = DSI_LANE_UNUSED;
3778
3779 num_lanes = 0;
3780
3781 for (i = 0; i < num_pins; i += 2) {
3782 u8 lane, pol;
3783 int dx, dy;
3784
3785 dx = pins[i];
3786 dy = pins[i + 1];
3787
3788 if (dx < 0 || dx >= dsi->num_lanes_supported * 2)
3789 return -EINVAL;
3790
3791 if (dy < 0 || dy >= dsi->num_lanes_supported * 2)
3792 return -EINVAL;
3793
3794 if (dx & 1) {
3795 if (dy != dx - 1)
3796 return -EINVAL;
3797 pol = 1;
3798 } else {
3799 if (dy != dx + 1)
3800 return -EINVAL;
3801 pol = 0;
3802 }
3803
3804 lane = dx / 2;
3805
3806 lanes[lane].function = functions[i / 2];
3807 lanes[lane].polarity = pol;
3808 num_lanes++;
3809 }
3810
3811 memcpy(dsi->lanes, lanes, sizeof(dsi->lanes));
3812 dsi->num_lanes_used = num_lanes;
3813
3814 return 0;
3815 }
3816
dsi_enable_video_output(struct omap_dss_device * dssdev,int channel)3817 static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
3818 {
3819 struct dsi_data *dsi = to_dsi_data(dssdev);
3820 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3821 struct omap_dss_device *out = &dsi->output;
3822 u8 data_type;
3823 u16 word_count;
3824 int r;
3825
3826 if (!out->dispc_channel_connected) {
3827 DSSERR("failed to enable display: no output/manager\n");
3828 return -ENODEV;
3829 }
3830
3831 r = dsi_display_init_dispc(dsi);
3832 if (r)
3833 goto err_init_dispc;
3834
3835 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3836 switch (dsi->pix_fmt) {
3837 case OMAP_DSS_DSI_FMT_RGB888:
3838 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
3839 break;
3840 case OMAP_DSS_DSI_FMT_RGB666:
3841 data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
3842 break;
3843 case OMAP_DSS_DSI_FMT_RGB666_PACKED:
3844 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
3845 break;
3846 case OMAP_DSS_DSI_FMT_RGB565:
3847 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
3848 break;
3849 default:
3850 r = -EINVAL;
3851 goto err_pix_fmt;
3852 }
3853
3854 dsi_if_enable(dsi, false);
3855 dsi_vc_enable(dsi, channel, false);
3856
3857 /* MODE, 1 = video mode */
3858 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), 1, 4, 4);
3859
3860 word_count = DIV_ROUND_UP(dsi->vm.hactive * bpp, 8);
3861
3862 dsi_vc_write_long_header(dsi, channel, data_type,
3863 word_count, 0);
3864
3865 dsi_vc_enable(dsi, channel, true);
3866 dsi_if_enable(dsi, true);
3867 }
3868
3869 r = dss_mgr_enable(&dsi->output);
3870 if (r)
3871 goto err_mgr_enable;
3872
3873 return 0;
3874
3875 err_mgr_enable:
3876 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3877 dsi_if_enable(dsi, false);
3878 dsi_vc_enable(dsi, channel, false);
3879 }
3880 err_pix_fmt:
3881 dsi_display_uninit_dispc(dsi);
3882 err_init_dispc:
3883 return r;
3884 }
3885
dsi_disable_video_output(struct omap_dss_device * dssdev,int channel)3886 static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel)
3887 {
3888 struct dsi_data *dsi = to_dsi_data(dssdev);
3889
3890 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3891 dsi_if_enable(dsi, false);
3892 dsi_vc_enable(dsi, channel, false);
3893
3894 /* MODE, 0 = command mode */
3895 REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), 0, 4, 4);
3896
3897 dsi_vc_enable(dsi, channel, true);
3898 dsi_if_enable(dsi, true);
3899 }
3900
3901 dss_mgr_disable(&dsi->output);
3902
3903 dsi_display_uninit_dispc(dsi);
3904 }
3905
dsi_update_screen_dispc(struct dsi_data * dsi)3906 static void dsi_update_screen_dispc(struct dsi_data *dsi)
3907 {
3908 unsigned int bytespp;
3909 unsigned int bytespl;
3910 unsigned int bytespf;
3911 unsigned int total_len;
3912 unsigned int packet_payload;
3913 unsigned int packet_len;
3914 u32 l;
3915 int r;
3916 const unsigned channel = dsi->update_channel;
3917 const unsigned int line_buf_size = dsi->line_buffer_size;
3918 u16 w = dsi->vm.hactive;
3919 u16 h = dsi->vm.vactive;
3920
3921 DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h);
3922
3923 dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_VP);
3924
3925 bytespp = dsi_get_pixel_size(dsi->pix_fmt) / 8;
3926 bytespl = w * bytespp;
3927 bytespf = bytespl * h;
3928
3929 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3930 * number of lines in a packet. See errata about VP_CLK_RATIO */
3931
3932 if (bytespf < line_buf_size)
3933 packet_payload = bytespf;
3934 else
3935 packet_payload = (line_buf_size) / bytespl * bytespl;
3936
3937 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3938 total_len = (bytespf / packet_payload) * packet_len;
3939
3940 if (bytespf % packet_payload)
3941 total_len += (bytespf % packet_payload) + 1;
3942
3943 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3944 dsi_write_reg(dsi, DSI_VC_TE(channel), l);
3945
3946 dsi_vc_write_long_header(dsi, channel, MIPI_DSI_DCS_LONG_WRITE,
3947 packet_len, 0);
3948
3949 if (dsi->te_enabled)
3950 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3951 else
3952 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3953 dsi_write_reg(dsi, DSI_VC_TE(channel), l);
3954
3955 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3956 * because DSS interrupts are not capable of waking up the CPU and the
3957 * framedone interrupt could be delayed for quite a long time. I think
3958 * the same goes for any DSS interrupts, but for some reason I have not
3959 * seen the problem anywhere else than here.
3960 */
3961 dispc_disable_sidle(dsi->dss->dispc);
3962
3963 dsi_perf_mark_start(dsi);
3964
3965 r = schedule_delayed_work(&dsi->framedone_timeout_work,
3966 msecs_to_jiffies(250));
3967 BUG_ON(r == 0);
3968
3969 dss_mgr_set_timings(&dsi->output, &dsi->vm);
3970
3971 dss_mgr_start_update(&dsi->output);
3972
3973 if (dsi->te_enabled) {
3974 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3975 * for TE is longer than the timer allows */
3976 REG_FLD_MOD(dsi, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3977
3978 dsi_vc_send_bta(dsi, channel);
3979
3980 #ifdef DSI_CATCH_MISSING_TE
3981 mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250));
3982 #endif
3983 }
3984 }
3985
3986 #ifdef DSI_CATCH_MISSING_TE
dsi_te_timeout(struct timer_list * unused)3987 static void dsi_te_timeout(struct timer_list *unused)
3988 {
3989 DSSERR("TE not received for 250ms!\n");
3990 }
3991 #endif
3992
dsi_handle_framedone(struct dsi_data * dsi,int error)3993 static void dsi_handle_framedone(struct dsi_data *dsi, int error)
3994 {
3995 /* SIDLEMODE back to smart-idle */
3996 dispc_enable_sidle(dsi->dss->dispc);
3997
3998 if (dsi->te_enabled) {
3999 /* enable LP_RX_TO again after the TE */
4000 REG_FLD_MOD(dsi, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
4001 }
4002
4003 dsi->framedone_callback(error, dsi->framedone_data);
4004
4005 if (!error)
4006 dsi_perf_show(dsi, "DISPC");
4007 }
4008
dsi_framedone_timeout_work_callback(struct work_struct * work)4009 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
4010 {
4011 struct dsi_data *dsi = container_of(work, struct dsi_data,
4012 framedone_timeout_work.work);
4013 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
4014 * 250ms which would conflict with this timeout work. What should be
4015 * done is first cancel the transfer on the HW, and then cancel the
4016 * possibly scheduled framedone work. However, cancelling the transfer
4017 * on the HW is buggy, and would probably require resetting the whole
4018 * DSI */
4019
4020 DSSERR("Framedone not received for 250ms!\n");
4021
4022 dsi_handle_framedone(dsi, -ETIMEDOUT);
4023 }
4024
dsi_framedone_irq_callback(void * data)4025 static void dsi_framedone_irq_callback(void *data)
4026 {
4027 struct dsi_data *dsi = data;
4028
4029 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
4030 * turns itself off. However, DSI still has the pixels in its buffers,
4031 * and is sending the data.
4032 */
4033
4034 cancel_delayed_work(&dsi->framedone_timeout_work);
4035
4036 dsi_handle_framedone(dsi, 0);
4037 }
4038
dsi_update(struct omap_dss_device * dssdev,int channel,void (* callback)(int,void *),void * data)4039 static int dsi_update(struct omap_dss_device *dssdev, int channel,
4040 void (*callback)(int, void *), void *data)
4041 {
4042 struct dsi_data *dsi = to_dsi_data(dssdev);
4043 u16 dw, dh;
4044
4045 dsi_perf_mark_setup(dsi);
4046
4047 dsi->update_channel = channel;
4048
4049 dsi->framedone_callback = callback;
4050 dsi->framedone_data = data;
4051
4052 dw = dsi->vm.hactive;
4053 dh = dsi->vm.vactive;
4054
4055 #ifdef DSI_PERF_MEASURE
4056 dsi->update_bytes = dw * dh *
4057 dsi_get_pixel_size(dsi->pix_fmt) / 8;
4058 #endif
4059 dsi_update_screen_dispc(dsi);
4060
4061 return 0;
4062 }
4063
4064 /* Display funcs */
4065
dsi_configure_dispc_clocks(struct dsi_data * dsi)4066 static int dsi_configure_dispc_clocks(struct dsi_data *dsi)
4067 {
4068 struct dispc_clock_info dispc_cinfo;
4069 int r;
4070 unsigned long fck;
4071
4072 fck = dsi_get_pll_hsdiv_dispc_rate(dsi);
4073
4074 dispc_cinfo.lck_div = dsi->user_dispc_cinfo.lck_div;
4075 dispc_cinfo.pck_div = dsi->user_dispc_cinfo.pck_div;
4076
4077 r = dispc_calc_clock_rates(dsi->dss->dispc, fck, &dispc_cinfo);
4078 if (r) {
4079 DSSERR("Failed to calc dispc clocks\n");
4080 return r;
4081 }
4082
4083 dsi->mgr_config.clock_info = dispc_cinfo;
4084
4085 return 0;
4086 }
4087
dsi_display_init_dispc(struct dsi_data * dsi)4088 static int dsi_display_init_dispc(struct dsi_data *dsi)
4089 {
4090 enum omap_channel channel = dsi->output.dispc_channel;
4091 int r;
4092
4093 dss_select_lcd_clk_source(dsi->dss, channel, dsi->module_id == 0 ?
4094 DSS_CLK_SRC_PLL1_1 :
4095 DSS_CLK_SRC_PLL2_1);
4096
4097 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) {
4098 r = dss_mgr_register_framedone_handler(&dsi->output,
4099 dsi_framedone_irq_callback, dsi);
4100 if (r) {
4101 DSSERR("can't register FRAMEDONE handler\n");
4102 goto err;
4103 }
4104
4105 dsi->mgr_config.stallmode = true;
4106 dsi->mgr_config.fifohandcheck = true;
4107 } else {
4108 dsi->mgr_config.stallmode = false;
4109 dsi->mgr_config.fifohandcheck = false;
4110 }
4111
4112 /*
4113 * override interlace, logic level and edge related parameters in
4114 * videomode with default values
4115 */
4116 dsi->vm.flags &= ~DISPLAY_FLAGS_INTERLACED;
4117 dsi->vm.flags &= ~DISPLAY_FLAGS_HSYNC_LOW;
4118 dsi->vm.flags |= DISPLAY_FLAGS_HSYNC_HIGH;
4119 dsi->vm.flags &= ~DISPLAY_FLAGS_VSYNC_LOW;
4120 dsi->vm.flags |= DISPLAY_FLAGS_VSYNC_HIGH;
4121 dsi->vm.flags &= ~DISPLAY_FLAGS_PIXDATA_NEGEDGE;
4122 dsi->vm.flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
4123 dsi->vm.flags &= ~DISPLAY_FLAGS_DE_LOW;
4124 dsi->vm.flags |= DISPLAY_FLAGS_DE_HIGH;
4125 dsi->vm.flags &= ~DISPLAY_FLAGS_SYNC_POSEDGE;
4126 dsi->vm.flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
4127
4128 dss_mgr_set_timings(&dsi->output, &dsi->vm);
4129
4130 r = dsi_configure_dispc_clocks(dsi);
4131 if (r)
4132 goto err1;
4133
4134 dsi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
4135 dsi->mgr_config.video_port_width =
4136 dsi_get_pixel_size(dsi->pix_fmt);
4137 dsi->mgr_config.lcden_sig_polarity = 0;
4138
4139 dss_mgr_set_lcd_config(&dsi->output, &dsi->mgr_config);
4140
4141 return 0;
4142 err1:
4143 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
4144 dss_mgr_unregister_framedone_handler(&dsi->output,
4145 dsi_framedone_irq_callback, dsi);
4146 err:
4147 dss_select_lcd_clk_source(dsi->dss, channel, DSS_CLK_SRC_FCK);
4148 return r;
4149 }
4150
dsi_display_uninit_dispc(struct dsi_data * dsi)4151 static void dsi_display_uninit_dispc(struct dsi_data *dsi)
4152 {
4153 enum omap_channel channel = dsi->output.dispc_channel;
4154
4155 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
4156 dss_mgr_unregister_framedone_handler(&dsi->output,
4157 dsi_framedone_irq_callback, dsi);
4158
4159 dss_select_lcd_clk_source(dsi->dss, channel, DSS_CLK_SRC_FCK);
4160 }
4161
dsi_configure_dsi_clocks(struct dsi_data * dsi)4162 static int dsi_configure_dsi_clocks(struct dsi_data *dsi)
4163 {
4164 struct dss_pll_clock_info cinfo;
4165 int r;
4166
4167 cinfo = dsi->user_dsi_cinfo;
4168
4169 r = dss_pll_set_config(&dsi->pll, &cinfo);
4170 if (r) {
4171 DSSERR("Failed to set dsi clocks\n");
4172 return r;
4173 }
4174
4175 return 0;
4176 }
4177
dsi_display_init_dsi(struct dsi_data * dsi)4178 static int dsi_display_init_dsi(struct dsi_data *dsi)
4179 {
4180 int r;
4181
4182 r = dss_pll_enable(&dsi->pll);
4183 if (r)
4184 return r;
4185
4186 r = dsi_configure_dsi_clocks(dsi);
4187 if (r)
4188 goto err0;
4189
4190 dss_select_dsi_clk_source(dsi->dss, dsi->module_id,
4191 dsi->module_id == 0 ?
4192 DSS_CLK_SRC_PLL1_2 : DSS_CLK_SRC_PLL2_2);
4193
4194 DSSDBG("PLL OK\n");
4195
4196 if (!dsi->vdds_dsi_enabled) {
4197 r = regulator_enable(dsi->vdds_dsi_reg);
4198 if (r)
4199 goto err1;
4200
4201 dsi->vdds_dsi_enabled = true;
4202 }
4203
4204 r = dsi_cio_init(dsi);
4205 if (r)
4206 goto err2;
4207
4208 _dsi_print_reset_status(dsi);
4209
4210 dsi_proto_timings(dsi);
4211 dsi_set_lp_clk_divisor(dsi);
4212
4213 if (1)
4214 _dsi_print_reset_status(dsi);
4215
4216 r = dsi_proto_config(dsi);
4217 if (r)
4218 goto err3;
4219
4220 /* enable interface */
4221 dsi_vc_enable(dsi, 0, 1);
4222 dsi_vc_enable(dsi, 1, 1);
4223 dsi_vc_enable(dsi, 2, 1);
4224 dsi_vc_enable(dsi, 3, 1);
4225 dsi_if_enable(dsi, 1);
4226 dsi_force_tx_stop_mode_io(dsi);
4227
4228 return 0;
4229 err3:
4230 dsi_cio_uninit(dsi);
4231 err2:
4232 regulator_disable(dsi->vdds_dsi_reg);
4233 dsi->vdds_dsi_enabled = false;
4234 err1:
4235 dss_select_dsi_clk_source(dsi->dss, dsi->module_id, DSS_CLK_SRC_FCK);
4236 err0:
4237 dss_pll_disable(&dsi->pll);
4238
4239 return r;
4240 }
4241
dsi_display_uninit_dsi(struct dsi_data * dsi,bool disconnect_lanes,bool enter_ulps)4242 static void dsi_display_uninit_dsi(struct dsi_data *dsi, bool disconnect_lanes,
4243 bool enter_ulps)
4244 {
4245 if (enter_ulps && !dsi->ulps_enabled)
4246 dsi_enter_ulps(dsi);
4247
4248 /* disable interface */
4249 dsi_if_enable(dsi, 0);
4250 dsi_vc_enable(dsi, 0, 0);
4251 dsi_vc_enable(dsi, 1, 0);
4252 dsi_vc_enable(dsi, 2, 0);
4253 dsi_vc_enable(dsi, 3, 0);
4254
4255 dss_select_dsi_clk_source(dsi->dss, dsi->module_id, DSS_CLK_SRC_FCK);
4256 dsi_cio_uninit(dsi);
4257 dss_pll_disable(&dsi->pll);
4258
4259 if (disconnect_lanes) {
4260 regulator_disable(dsi->vdds_dsi_reg);
4261 dsi->vdds_dsi_enabled = false;
4262 }
4263 }
4264
dsi_display_enable(struct omap_dss_device * dssdev)4265 static int dsi_display_enable(struct omap_dss_device *dssdev)
4266 {
4267 struct dsi_data *dsi = to_dsi_data(dssdev);
4268 int r = 0;
4269
4270 DSSDBG("dsi_display_enable\n");
4271
4272 WARN_ON(!dsi_bus_is_locked(dsi));
4273
4274 mutex_lock(&dsi->lock);
4275
4276 r = dsi_runtime_get(dsi);
4277 if (r)
4278 goto err_get_dsi;
4279
4280 _dsi_initialize_irq(dsi);
4281
4282 r = dsi_display_init_dsi(dsi);
4283 if (r)
4284 goto err_init_dsi;
4285
4286 mutex_unlock(&dsi->lock);
4287
4288 return 0;
4289
4290 err_init_dsi:
4291 dsi_runtime_put(dsi);
4292 err_get_dsi:
4293 mutex_unlock(&dsi->lock);
4294 DSSDBG("dsi_display_enable FAILED\n");
4295 return r;
4296 }
4297
dsi_display_disable(struct omap_dss_device * dssdev,bool disconnect_lanes,bool enter_ulps)4298 static void dsi_display_disable(struct omap_dss_device *dssdev,
4299 bool disconnect_lanes, bool enter_ulps)
4300 {
4301 struct dsi_data *dsi = to_dsi_data(dssdev);
4302
4303 DSSDBG("dsi_display_disable\n");
4304
4305 WARN_ON(!dsi_bus_is_locked(dsi));
4306
4307 mutex_lock(&dsi->lock);
4308
4309 dsi_sync_vc(dsi, 0);
4310 dsi_sync_vc(dsi, 1);
4311 dsi_sync_vc(dsi, 2);
4312 dsi_sync_vc(dsi, 3);
4313
4314 dsi_display_uninit_dsi(dsi, disconnect_lanes, enter_ulps);
4315
4316 dsi_runtime_put(dsi);
4317
4318 mutex_unlock(&dsi->lock);
4319 }
4320
dsi_enable_te(struct omap_dss_device * dssdev,bool enable)4321 static int dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
4322 {
4323 struct dsi_data *dsi = to_dsi_data(dssdev);
4324
4325 dsi->te_enabled = enable;
4326 return 0;
4327 }
4328
4329 #ifdef PRINT_VERBOSE_VM_TIMINGS
print_dsi_vm(const char * str,const struct omap_dss_dsi_videomode_timings * t)4330 static void print_dsi_vm(const char *str,
4331 const struct omap_dss_dsi_videomode_timings *t)
4332 {
4333 unsigned long byteclk = t->hsclk / 4;
4334 int bl, wc, pps, tot;
4335
4336 wc = DIV_ROUND_UP(t->hact * t->bitspp, 8);
4337 pps = DIV_ROUND_UP(wc + 6, t->ndl); /* pixel packet size */
4338 bl = t->hss + t->hsa + t->hse + t->hbp + t->hfp;
4339 tot = bl + pps;
4340
4341 #define TO_DSI_T(x) ((u32)div64_u64((u64)x * 1000000000llu, byteclk))
4342
4343 pr_debug("%s bck %lu, %u/%u/%u/%u/%u/%u = %u+%u = %u, "
4344 "%u/%u/%u/%u/%u/%u = %u + %u = %u\n",
4345 str,
4346 byteclk,
4347 t->hss, t->hsa, t->hse, t->hbp, pps, t->hfp,
4348 bl, pps, tot,
4349 TO_DSI_T(t->hss),
4350 TO_DSI_T(t->hsa),
4351 TO_DSI_T(t->hse),
4352 TO_DSI_T(t->hbp),
4353 TO_DSI_T(pps),
4354 TO_DSI_T(t->hfp),
4355
4356 TO_DSI_T(bl),
4357 TO_DSI_T(pps),
4358
4359 TO_DSI_T(tot));
4360 #undef TO_DSI_T
4361 }
4362
print_dispc_vm(const char * str,const struct videomode * vm)4363 static void print_dispc_vm(const char *str, const struct videomode *vm)
4364 {
4365 unsigned long pck = vm->pixelclock;
4366 int hact, bl, tot;
4367
4368 hact = vm->hactive;
4369 bl = vm->hsync_len + vm->hback_porch + vm->hfront_porch;
4370 tot = hact + bl;
4371
4372 #define TO_DISPC_T(x) ((u32)div64_u64((u64)x * 1000000000llu, pck))
4373
4374 pr_debug("%s pck %lu, %u/%u/%u/%u = %u+%u = %u, "
4375 "%u/%u/%u/%u = %u + %u = %u\n",
4376 str,
4377 pck,
4378 vm->hsync_len, vm->hback_porch, hact, vm->hfront_porch,
4379 bl, hact, tot,
4380 TO_DISPC_T(vm->hsync_len),
4381 TO_DISPC_T(vm->hback_porch),
4382 TO_DISPC_T(hact),
4383 TO_DISPC_T(vm->hfront_porch),
4384 TO_DISPC_T(bl),
4385 TO_DISPC_T(hact),
4386 TO_DISPC_T(tot));
4387 #undef TO_DISPC_T
4388 }
4389
4390 /* note: this is not quite accurate */
print_dsi_dispc_vm(const char * str,const struct omap_dss_dsi_videomode_timings * t)4391 static void print_dsi_dispc_vm(const char *str,
4392 const struct omap_dss_dsi_videomode_timings *t)
4393 {
4394 struct videomode vm = { 0 };
4395 unsigned long byteclk = t->hsclk / 4;
4396 unsigned long pck;
4397 u64 dsi_tput;
4398 int dsi_hact, dsi_htot;
4399
4400 dsi_tput = (u64)byteclk * t->ndl * 8;
4401 pck = (u32)div64_u64(dsi_tput, t->bitspp);
4402 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(t->hact * t->bitspp, 8) + 6, t->ndl);
4403 dsi_htot = t->hss + t->hsa + t->hse + t->hbp + dsi_hact + t->hfp;
4404
4405 vm.pixelclock = pck;
4406 vm.hsync_len = div64_u64((u64)(t->hsa + t->hse) * pck, byteclk);
4407 vm.hback_porch = div64_u64((u64)t->hbp * pck, byteclk);
4408 vm.hfront_porch = div64_u64((u64)t->hfp * pck, byteclk);
4409 vm.hactive = t->hact;
4410
4411 print_dispc_vm(str, &vm);
4412 }
4413 #endif /* PRINT_VERBOSE_VM_TIMINGS */
4414
dsi_cm_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)4415 static bool dsi_cm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
4416 unsigned long pck, void *data)
4417 {
4418 struct dsi_clk_calc_ctx *ctx = data;
4419 struct videomode *vm = &ctx->vm;
4420
4421 ctx->dispc_cinfo.lck_div = lckd;
4422 ctx->dispc_cinfo.pck_div = pckd;
4423 ctx->dispc_cinfo.lck = lck;
4424 ctx->dispc_cinfo.pck = pck;
4425
4426 *vm = *ctx->config->vm;
4427 vm->pixelclock = pck;
4428 vm->hactive = ctx->config->vm->hactive;
4429 vm->vactive = ctx->config->vm->vactive;
4430 vm->hsync_len = vm->hfront_porch = vm->hback_porch = vm->vsync_len = 1;
4431 vm->vfront_porch = vm->vback_porch = 0;
4432
4433 return true;
4434 }
4435
dsi_cm_calc_hsdiv_cb(int m_dispc,unsigned long dispc,void * data)4436 static bool dsi_cm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
4437 void *data)
4438 {
4439 struct dsi_clk_calc_ctx *ctx = data;
4440
4441 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
4442 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
4443
4444 return dispc_div_calc(ctx->dsi->dss->dispc, dispc,
4445 ctx->req_pck_min, ctx->req_pck_max,
4446 dsi_cm_calc_dispc_cb, ctx);
4447 }
4448
dsi_cm_calc_pll_cb(int n,int m,unsigned long fint,unsigned long clkdco,void * data)4449 static bool dsi_cm_calc_pll_cb(int n, int m, unsigned long fint,
4450 unsigned long clkdco, void *data)
4451 {
4452 struct dsi_clk_calc_ctx *ctx = data;
4453 struct dsi_data *dsi = ctx->dsi;
4454
4455 ctx->dsi_cinfo.n = n;
4456 ctx->dsi_cinfo.m = m;
4457 ctx->dsi_cinfo.fint = fint;
4458 ctx->dsi_cinfo.clkdco = clkdco;
4459
4460 return dss_pll_hsdiv_calc_a(ctx->pll, clkdco, ctx->req_pck_min,
4461 dsi->data->max_fck_freq,
4462 dsi_cm_calc_hsdiv_cb, ctx);
4463 }
4464
dsi_cm_calc(struct dsi_data * dsi,const struct omap_dss_dsi_config * cfg,struct dsi_clk_calc_ctx * ctx)4465 static bool dsi_cm_calc(struct dsi_data *dsi,
4466 const struct omap_dss_dsi_config *cfg,
4467 struct dsi_clk_calc_ctx *ctx)
4468 {
4469 unsigned long clkin;
4470 int bitspp, ndl;
4471 unsigned long pll_min, pll_max;
4472 unsigned long pck, txbyteclk;
4473
4474 clkin = clk_get_rate(dsi->pll.clkin);
4475 bitspp = dsi_get_pixel_size(cfg->pixel_format);
4476 ndl = dsi->num_lanes_used - 1;
4477
4478 /*
4479 * Here we should calculate minimum txbyteclk to be able to send the
4480 * frame in time, and also to handle TE. That's not very simple, though,
4481 * especially as we go to LP between each pixel packet due to HW
4482 * "feature". So let's just estimate very roughly and multiply by 1.5.
4483 */
4484 pck = cfg->vm->pixelclock;
4485 pck = pck * 3 / 2;
4486 txbyteclk = pck * bitspp / 8 / ndl;
4487
4488 memset(ctx, 0, sizeof(*ctx));
4489 ctx->dsi = dsi;
4490 ctx->pll = &dsi->pll;
4491 ctx->config = cfg;
4492 ctx->req_pck_min = pck;
4493 ctx->req_pck_nom = pck;
4494 ctx->req_pck_max = pck * 3 / 2;
4495
4496 pll_min = max(cfg->hs_clk_min * 4, txbyteclk * 4 * 4);
4497 pll_max = cfg->hs_clk_max * 4;
4498
4499 return dss_pll_calc_a(ctx->pll, clkin,
4500 pll_min, pll_max,
4501 dsi_cm_calc_pll_cb, ctx);
4502 }
4503
dsi_vm_calc_blanking(struct dsi_clk_calc_ctx * ctx)4504 static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx)
4505 {
4506 struct dsi_data *dsi = ctx->dsi;
4507 const struct omap_dss_dsi_config *cfg = ctx->config;
4508 int bitspp = dsi_get_pixel_size(cfg->pixel_format);
4509 int ndl = dsi->num_lanes_used - 1;
4510 unsigned long hsclk = ctx->dsi_cinfo.clkdco / 4;
4511 unsigned long byteclk = hsclk / 4;
4512
4513 unsigned long dispc_pck, req_pck_min, req_pck_nom, req_pck_max;
4514 int xres;
4515 int panel_htot, panel_hbl; /* pixels */
4516 int dispc_htot, dispc_hbl; /* pixels */
4517 int dsi_htot, dsi_hact, dsi_hbl, hss, hse; /* byteclks */
4518 int hfp, hsa, hbp;
4519 const struct videomode *req_vm;
4520 struct videomode *dispc_vm;
4521 struct omap_dss_dsi_videomode_timings *dsi_vm;
4522 u64 dsi_tput, dispc_tput;
4523
4524 dsi_tput = (u64)byteclk * ndl * 8;
4525
4526 req_vm = cfg->vm;
4527 req_pck_min = ctx->req_pck_min;
4528 req_pck_max = ctx->req_pck_max;
4529 req_pck_nom = ctx->req_pck_nom;
4530
4531 dispc_pck = ctx->dispc_cinfo.pck;
4532 dispc_tput = (u64)dispc_pck * bitspp;
4533
4534 xres = req_vm->hactive;
4535
4536 panel_hbl = req_vm->hfront_porch + req_vm->hback_porch +
4537 req_vm->hsync_len;
4538 panel_htot = xres + panel_hbl;
4539
4540 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(xres * bitspp, 8) + 6, ndl);
4541
4542 /*
4543 * When there are no line buffers, DISPC and DSI must have the
4544 * same tput. Otherwise DISPC tput needs to be higher than DSI's.
4545 */
4546 if (dsi->line_buffer_size < xres * bitspp / 8) {
4547 if (dispc_tput != dsi_tput)
4548 return false;
4549 } else {
4550 if (dispc_tput < dsi_tput)
4551 return false;
4552 }
4553
4554 /* DSI tput must be over the min requirement */
4555 if (dsi_tput < (u64)bitspp * req_pck_min)
4556 return false;
4557
4558 /* When non-burst mode, DSI tput must be below max requirement. */
4559 if (cfg->trans_mode != OMAP_DSS_DSI_BURST_MODE) {
4560 if (dsi_tput > (u64)bitspp * req_pck_max)
4561 return false;
4562 }
4563
4564 hss = DIV_ROUND_UP(4, ndl);
4565
4566 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
4567 if (ndl == 3 && req_vm->hsync_len == 0)
4568 hse = 1;
4569 else
4570 hse = DIV_ROUND_UP(4, ndl);
4571 } else {
4572 hse = 0;
4573 }
4574
4575 /* DSI htot to match the panel's nominal pck */
4576 dsi_htot = div64_u64((u64)panel_htot * byteclk, req_pck_nom);
4577
4578 /* fail if there would be no time for blanking */
4579 if (dsi_htot < hss + hse + dsi_hact)
4580 return false;
4581
4582 /* total DSI blanking needed to achieve panel's TL */
4583 dsi_hbl = dsi_htot - dsi_hact;
4584
4585 /* DISPC htot to match the DSI TL */
4586 dispc_htot = div64_u64((u64)dsi_htot * dispc_pck, byteclk);
4587
4588 /* verify that the DSI and DISPC TLs are the same */
4589 if ((u64)dsi_htot * dispc_pck != (u64)dispc_htot * byteclk)
4590 return false;
4591
4592 dispc_hbl = dispc_htot - xres;
4593
4594 /* setup DSI videomode */
4595
4596 dsi_vm = &ctx->dsi_vm;
4597 memset(dsi_vm, 0, sizeof(*dsi_vm));
4598
4599 dsi_vm->hsclk = hsclk;
4600
4601 dsi_vm->ndl = ndl;
4602 dsi_vm->bitspp = bitspp;
4603
4604 if (cfg->trans_mode != OMAP_DSS_DSI_PULSE_MODE) {
4605 hsa = 0;
4606 } else if (ndl == 3 && req_vm->hsync_len == 0) {
4607 hsa = 0;
4608 } else {
4609 hsa = div64_u64((u64)req_vm->hsync_len * byteclk, req_pck_nom);
4610 hsa = max(hsa - hse, 1);
4611 }
4612
4613 hbp = div64_u64((u64)req_vm->hback_porch * byteclk, req_pck_nom);
4614 hbp = max(hbp, 1);
4615
4616 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4617 if (hfp < 1) {
4618 int t;
4619 /* we need to take cycles from hbp */
4620
4621 t = 1 - hfp;
4622 hbp = max(hbp - t, 1);
4623 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4624
4625 if (hfp < 1 && hsa > 0) {
4626 /* we need to take cycles from hsa */
4627 t = 1 - hfp;
4628 hsa = max(hsa - t, 1);
4629 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4630 }
4631 }
4632
4633 if (hfp < 1)
4634 return false;
4635
4636 dsi_vm->hss = hss;
4637 dsi_vm->hsa = hsa;
4638 dsi_vm->hse = hse;
4639 dsi_vm->hbp = hbp;
4640 dsi_vm->hact = xres;
4641 dsi_vm->hfp = hfp;
4642
4643 dsi_vm->vsa = req_vm->vsync_len;
4644 dsi_vm->vbp = req_vm->vback_porch;
4645 dsi_vm->vact = req_vm->vactive;
4646 dsi_vm->vfp = req_vm->vfront_porch;
4647
4648 dsi_vm->trans_mode = cfg->trans_mode;
4649
4650 dsi_vm->blanking_mode = 0;
4651 dsi_vm->hsa_blanking_mode = 1;
4652 dsi_vm->hfp_blanking_mode = 1;
4653 dsi_vm->hbp_blanking_mode = 1;
4654
4655 dsi_vm->ddr_clk_always_on = cfg->ddr_clk_always_on;
4656 dsi_vm->window_sync = 4;
4657
4658 /* setup DISPC videomode */
4659
4660 dispc_vm = &ctx->vm;
4661 *dispc_vm = *req_vm;
4662 dispc_vm->pixelclock = dispc_pck;
4663
4664 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
4665 hsa = div64_u64((u64)req_vm->hsync_len * dispc_pck,
4666 req_pck_nom);
4667 hsa = max(hsa, 1);
4668 } else {
4669 hsa = 1;
4670 }
4671
4672 hbp = div64_u64((u64)req_vm->hback_porch * dispc_pck, req_pck_nom);
4673 hbp = max(hbp, 1);
4674
4675 hfp = dispc_hbl - hsa - hbp;
4676 if (hfp < 1) {
4677 int t;
4678 /* we need to take cycles from hbp */
4679
4680 t = 1 - hfp;
4681 hbp = max(hbp - t, 1);
4682 hfp = dispc_hbl - hsa - hbp;
4683
4684 if (hfp < 1) {
4685 /* we need to take cycles from hsa */
4686 t = 1 - hfp;
4687 hsa = max(hsa - t, 1);
4688 hfp = dispc_hbl - hsa - hbp;
4689 }
4690 }
4691
4692 if (hfp < 1)
4693 return false;
4694
4695 dispc_vm->hfront_porch = hfp;
4696 dispc_vm->hsync_len = hsa;
4697 dispc_vm->hback_porch = hbp;
4698
4699 return true;
4700 }
4701
4702
dsi_vm_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)4703 static bool dsi_vm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
4704 unsigned long pck, void *data)
4705 {
4706 struct dsi_clk_calc_ctx *ctx = data;
4707
4708 ctx->dispc_cinfo.lck_div = lckd;
4709 ctx->dispc_cinfo.pck_div = pckd;
4710 ctx->dispc_cinfo.lck = lck;
4711 ctx->dispc_cinfo.pck = pck;
4712
4713 if (dsi_vm_calc_blanking(ctx) == false)
4714 return false;
4715
4716 #ifdef PRINT_VERBOSE_VM_TIMINGS
4717 print_dispc_vm("dispc", &ctx->vm);
4718 print_dsi_vm("dsi ", &ctx->dsi_vm);
4719 print_dispc_vm("req ", ctx->config->vm);
4720 print_dsi_dispc_vm("act ", &ctx->dsi_vm);
4721 #endif
4722
4723 return true;
4724 }
4725
dsi_vm_calc_hsdiv_cb(int m_dispc,unsigned long dispc,void * data)4726 static bool dsi_vm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
4727 void *data)
4728 {
4729 struct dsi_clk_calc_ctx *ctx = data;
4730 unsigned long pck_max;
4731
4732 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
4733 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
4734
4735 /*
4736 * In burst mode we can let the dispc pck be arbitrarily high, but it
4737 * limits our scaling abilities. So for now, don't aim too high.
4738 */
4739
4740 if (ctx->config->trans_mode == OMAP_DSS_DSI_BURST_MODE)
4741 pck_max = ctx->req_pck_max + 10000000;
4742 else
4743 pck_max = ctx->req_pck_max;
4744
4745 return dispc_div_calc(ctx->dsi->dss->dispc, dispc,
4746 ctx->req_pck_min, pck_max,
4747 dsi_vm_calc_dispc_cb, ctx);
4748 }
4749
dsi_vm_calc_pll_cb(int n,int m,unsigned long fint,unsigned long clkdco,void * data)4750 static bool dsi_vm_calc_pll_cb(int n, int m, unsigned long fint,
4751 unsigned long clkdco, void *data)
4752 {
4753 struct dsi_clk_calc_ctx *ctx = data;
4754 struct dsi_data *dsi = ctx->dsi;
4755
4756 ctx->dsi_cinfo.n = n;
4757 ctx->dsi_cinfo.m = m;
4758 ctx->dsi_cinfo.fint = fint;
4759 ctx->dsi_cinfo.clkdco = clkdco;
4760
4761 return dss_pll_hsdiv_calc_a(ctx->pll, clkdco, ctx->req_pck_min,
4762 dsi->data->max_fck_freq,
4763 dsi_vm_calc_hsdiv_cb, ctx);
4764 }
4765
dsi_vm_calc(struct dsi_data * dsi,const struct omap_dss_dsi_config * cfg,struct dsi_clk_calc_ctx * ctx)4766 static bool dsi_vm_calc(struct dsi_data *dsi,
4767 const struct omap_dss_dsi_config *cfg,
4768 struct dsi_clk_calc_ctx *ctx)
4769 {
4770 const struct videomode *vm = cfg->vm;
4771 unsigned long clkin;
4772 unsigned long pll_min;
4773 unsigned long pll_max;
4774 int ndl = dsi->num_lanes_used - 1;
4775 int bitspp = dsi_get_pixel_size(cfg->pixel_format);
4776 unsigned long byteclk_min;
4777
4778 clkin = clk_get_rate(dsi->pll.clkin);
4779
4780 memset(ctx, 0, sizeof(*ctx));
4781 ctx->dsi = dsi;
4782 ctx->pll = &dsi->pll;
4783 ctx->config = cfg;
4784
4785 /* these limits should come from the panel driver */
4786 ctx->req_pck_min = vm->pixelclock - 1000;
4787 ctx->req_pck_nom = vm->pixelclock;
4788 ctx->req_pck_max = vm->pixelclock + 1000;
4789
4790 byteclk_min = div64_u64((u64)ctx->req_pck_min * bitspp, ndl * 8);
4791 pll_min = max(cfg->hs_clk_min * 4, byteclk_min * 4 * 4);
4792
4793 if (cfg->trans_mode == OMAP_DSS_DSI_BURST_MODE) {
4794 pll_max = cfg->hs_clk_max * 4;
4795 } else {
4796 unsigned long byteclk_max;
4797 byteclk_max = div64_u64((u64)ctx->req_pck_max * bitspp,
4798 ndl * 8);
4799
4800 pll_max = byteclk_max * 4 * 4;
4801 }
4802
4803 return dss_pll_calc_a(ctx->pll, clkin,
4804 pll_min, pll_max,
4805 dsi_vm_calc_pll_cb, ctx);
4806 }
4807
dsi_set_config(struct omap_dss_device * dssdev,const struct omap_dss_dsi_config * config)4808 static int dsi_set_config(struct omap_dss_device *dssdev,
4809 const struct omap_dss_dsi_config *config)
4810 {
4811 struct dsi_data *dsi = to_dsi_data(dssdev);
4812 struct dsi_clk_calc_ctx ctx;
4813 bool ok;
4814 int r;
4815
4816 mutex_lock(&dsi->lock);
4817
4818 dsi->pix_fmt = config->pixel_format;
4819 dsi->mode = config->mode;
4820
4821 if (config->mode == OMAP_DSS_DSI_VIDEO_MODE)
4822 ok = dsi_vm_calc(dsi, config, &ctx);
4823 else
4824 ok = dsi_cm_calc(dsi, config, &ctx);
4825
4826 if (!ok) {
4827 DSSERR("failed to find suitable DSI clock settings\n");
4828 r = -EINVAL;
4829 goto err;
4830 }
4831
4832 dsi_pll_calc_dsi_fck(dsi, &ctx.dsi_cinfo);
4833
4834 r = dsi_lp_clock_calc(ctx.dsi_cinfo.clkout[HSDIV_DSI],
4835 config->lp_clk_min, config->lp_clk_max, &dsi->user_lp_cinfo);
4836 if (r) {
4837 DSSERR("failed to find suitable DSI LP clock settings\n");
4838 goto err;
4839 }
4840
4841 dsi->user_dsi_cinfo = ctx.dsi_cinfo;
4842 dsi->user_dispc_cinfo = ctx.dispc_cinfo;
4843
4844 dsi->vm = ctx.vm;
4845 dsi->vm_timings = ctx.dsi_vm;
4846
4847 mutex_unlock(&dsi->lock);
4848
4849 return 0;
4850 err:
4851 mutex_unlock(&dsi->lock);
4852
4853 return r;
4854 }
4855
4856 /*
4857 * Return a hardcoded channel for the DSI output. This should work for
4858 * current use cases, but this can be later expanded to either resolve
4859 * the channel in some more dynamic manner, or get the channel as a user
4860 * parameter.
4861 */
dsi_get_channel(struct dsi_data * dsi)4862 static enum omap_channel dsi_get_channel(struct dsi_data *dsi)
4863 {
4864 switch (dsi->data->model) {
4865 case DSI_MODEL_OMAP3:
4866 return OMAP_DSS_CHANNEL_LCD;
4867
4868 case DSI_MODEL_OMAP4:
4869 switch (dsi->module_id) {
4870 case 0:
4871 return OMAP_DSS_CHANNEL_LCD;
4872 case 1:
4873 return OMAP_DSS_CHANNEL_LCD2;
4874 default:
4875 DSSWARN("unsupported module id\n");
4876 return OMAP_DSS_CHANNEL_LCD;
4877 }
4878
4879 case DSI_MODEL_OMAP5:
4880 switch (dsi->module_id) {
4881 case 0:
4882 return OMAP_DSS_CHANNEL_LCD;
4883 case 1:
4884 return OMAP_DSS_CHANNEL_LCD3;
4885 default:
4886 DSSWARN("unsupported module id\n");
4887 return OMAP_DSS_CHANNEL_LCD;
4888 }
4889
4890 default:
4891 DSSWARN("unsupported DSS version\n");
4892 return OMAP_DSS_CHANNEL_LCD;
4893 }
4894 }
4895
dsi_request_vc(struct omap_dss_device * dssdev,int * channel)4896 static int dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
4897 {
4898 struct dsi_data *dsi = to_dsi_data(dssdev);
4899 int i;
4900
4901 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
4902 if (!dsi->vc[i].dssdev) {
4903 dsi->vc[i].dssdev = dssdev;
4904 *channel = i;
4905 return 0;
4906 }
4907 }
4908
4909 DSSERR("cannot get VC for display %s", dssdev->name);
4910 return -ENOSPC;
4911 }
4912
dsi_set_vc_id(struct omap_dss_device * dssdev,int channel,int vc_id)4913 static int dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
4914 {
4915 struct dsi_data *dsi = to_dsi_data(dssdev);
4916
4917 if (vc_id < 0 || vc_id > 3) {
4918 DSSERR("VC ID out of range\n");
4919 return -EINVAL;
4920 }
4921
4922 if (channel < 0 || channel > 3) {
4923 DSSERR("Virtual Channel out of range\n");
4924 return -EINVAL;
4925 }
4926
4927 if (dsi->vc[channel].dssdev != dssdev) {
4928 DSSERR("Virtual Channel not allocated to display %s\n",
4929 dssdev->name);
4930 return -EINVAL;
4931 }
4932
4933 dsi->vc[channel].vc_id = vc_id;
4934
4935 return 0;
4936 }
4937
dsi_release_vc(struct omap_dss_device * dssdev,int channel)4938 static void dsi_release_vc(struct omap_dss_device *dssdev, int channel)
4939 {
4940 struct dsi_data *dsi = to_dsi_data(dssdev);
4941
4942 if ((channel >= 0 && channel <= 3) &&
4943 dsi->vc[channel].dssdev == dssdev) {
4944 dsi->vc[channel].dssdev = NULL;
4945 dsi->vc[channel].vc_id = 0;
4946 }
4947 }
4948
4949
dsi_get_clocks(struct dsi_data * dsi)4950 static int dsi_get_clocks(struct dsi_data *dsi)
4951 {
4952 struct clk *clk;
4953
4954 clk = devm_clk_get(dsi->dev, "fck");
4955 if (IS_ERR(clk)) {
4956 DSSERR("can't get fck\n");
4957 return PTR_ERR(clk);
4958 }
4959
4960 dsi->dss_clk = clk;
4961
4962 return 0;
4963 }
4964
dsi_connect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)4965 static int dsi_connect(struct omap_dss_device *dssdev,
4966 struct omap_dss_device *dst)
4967 {
4968 struct dsi_data *dsi = to_dsi_data(dssdev);
4969 int r;
4970
4971 r = dsi_regulator_init(dsi);
4972 if (r)
4973 return r;
4974
4975 r = dss_mgr_connect(&dsi->output, dssdev);
4976 if (r)
4977 return r;
4978
4979 r = omapdss_output_set_device(dssdev, dst);
4980 if (r) {
4981 DSSERR("failed to connect output to new device: %s\n",
4982 dssdev->name);
4983 dss_mgr_disconnect(&dsi->output, dssdev);
4984 return r;
4985 }
4986
4987 return 0;
4988 }
4989
dsi_disconnect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)4990 static void dsi_disconnect(struct omap_dss_device *dssdev,
4991 struct omap_dss_device *dst)
4992 {
4993 struct dsi_data *dsi = to_dsi_data(dssdev);
4994
4995 WARN_ON(dst != dssdev->dst);
4996
4997 if (dst != dssdev->dst)
4998 return;
4999
5000 omapdss_output_unset_device(dssdev);
5001
5002 dss_mgr_disconnect(&dsi->output, dssdev);
5003 }
5004
5005 static const struct omapdss_dsi_ops dsi_ops = {
5006 .connect = dsi_connect,
5007 .disconnect = dsi_disconnect,
5008
5009 .bus_lock = dsi_bus_lock,
5010 .bus_unlock = dsi_bus_unlock,
5011
5012 .enable = dsi_display_enable,
5013 .disable = dsi_display_disable,
5014
5015 .enable_hs = dsi_vc_enable_hs,
5016
5017 .configure_pins = dsi_configure_pins,
5018 .set_config = dsi_set_config,
5019
5020 .enable_video_output = dsi_enable_video_output,
5021 .disable_video_output = dsi_disable_video_output,
5022
5023 .update = dsi_update,
5024
5025 .enable_te = dsi_enable_te,
5026
5027 .request_vc = dsi_request_vc,
5028 .set_vc_id = dsi_set_vc_id,
5029 .release_vc = dsi_release_vc,
5030
5031 .dcs_write = dsi_vc_dcs_write,
5032 .dcs_write_nosync = dsi_vc_dcs_write_nosync,
5033 .dcs_read = dsi_vc_dcs_read,
5034
5035 .gen_write = dsi_vc_generic_write,
5036 .gen_write_nosync = dsi_vc_generic_write_nosync,
5037 .gen_read = dsi_vc_generic_read,
5038
5039 .bta_sync = dsi_vc_send_bta_sync,
5040
5041 .set_max_rx_packet_size = dsi_vc_set_max_rx_packet_size,
5042 };
5043
dsi_init_output(struct dsi_data * dsi)5044 static void dsi_init_output(struct dsi_data *dsi)
5045 {
5046 struct omap_dss_device *out = &dsi->output;
5047
5048 out->dev = dsi->dev;
5049 out->id = dsi->module_id == 0 ?
5050 OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
5051
5052 out->output_type = OMAP_DISPLAY_TYPE_DSI;
5053 out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
5054 out->dispc_channel = dsi_get_channel(dsi);
5055 out->ops.dsi = &dsi_ops;
5056 out->owner = THIS_MODULE;
5057
5058 omapdss_register_output(out);
5059 }
5060
dsi_uninit_output(struct dsi_data * dsi)5061 static void dsi_uninit_output(struct dsi_data *dsi)
5062 {
5063 struct omap_dss_device *out = &dsi->output;
5064
5065 omapdss_unregister_output(out);
5066 }
5067
dsi_probe_of(struct dsi_data * dsi)5068 static int dsi_probe_of(struct dsi_data *dsi)
5069 {
5070 struct device_node *node = dsi->dev->of_node;
5071 struct property *prop;
5072 u32 lane_arr[10];
5073 int len, num_pins;
5074 int r, i;
5075 struct device_node *ep;
5076 struct omap_dsi_pin_config pin_cfg;
5077
5078 ep = of_graph_get_endpoint_by_regs(node, 0, 0);
5079 if (!ep)
5080 return 0;
5081
5082 prop = of_find_property(ep, "lanes", &len);
5083 if (prop == NULL) {
5084 dev_err(dsi->dev, "failed to find lane data\n");
5085 r = -EINVAL;
5086 goto err;
5087 }
5088
5089 num_pins = len / sizeof(u32);
5090
5091 if (num_pins < 4 || num_pins % 2 != 0 ||
5092 num_pins > dsi->num_lanes_supported * 2) {
5093 dev_err(dsi->dev, "bad number of lanes\n");
5094 r = -EINVAL;
5095 goto err;
5096 }
5097
5098 r = of_property_read_u32_array(ep, "lanes", lane_arr, num_pins);
5099 if (r) {
5100 dev_err(dsi->dev, "failed to read lane data\n");
5101 goto err;
5102 }
5103
5104 pin_cfg.num_pins = num_pins;
5105 for (i = 0; i < num_pins; ++i)
5106 pin_cfg.pins[i] = (int)lane_arr[i];
5107
5108 r = dsi_configure_pins(&dsi->output, &pin_cfg);
5109 if (r) {
5110 dev_err(dsi->dev, "failed to configure pins");
5111 goto err;
5112 }
5113
5114 of_node_put(ep);
5115
5116 return 0;
5117
5118 err:
5119 of_node_put(ep);
5120 return r;
5121 }
5122
5123 static const struct dss_pll_ops dsi_pll_ops = {
5124 .enable = dsi_pll_enable,
5125 .disable = dsi_pll_disable,
5126 .set_config = dss_pll_write_config_type_a,
5127 };
5128
5129 static const struct dss_pll_hw dss_omap3_dsi_pll_hw = {
5130 .type = DSS_PLL_TYPE_A,
5131
5132 .n_max = (1 << 7) - 1,
5133 .m_max = (1 << 11) - 1,
5134 .mX_max = (1 << 4) - 1,
5135 .fint_min = 750000,
5136 .fint_max = 2100000,
5137 .clkdco_low = 1000000000,
5138 .clkdco_max = 1800000000,
5139
5140 .n_msb = 7,
5141 .n_lsb = 1,
5142 .m_msb = 18,
5143 .m_lsb = 8,
5144
5145 .mX_msb[0] = 22,
5146 .mX_lsb[0] = 19,
5147 .mX_msb[1] = 26,
5148 .mX_lsb[1] = 23,
5149
5150 .has_stopmode = true,
5151 .has_freqsel = true,
5152 .has_selfreqdco = false,
5153 .has_refsel = false,
5154 };
5155
5156 static const struct dss_pll_hw dss_omap4_dsi_pll_hw = {
5157 .type = DSS_PLL_TYPE_A,
5158
5159 .n_max = (1 << 8) - 1,
5160 .m_max = (1 << 12) - 1,
5161 .mX_max = (1 << 5) - 1,
5162 .fint_min = 500000,
5163 .fint_max = 2500000,
5164 .clkdco_low = 1000000000,
5165 .clkdco_max = 1800000000,
5166
5167 .n_msb = 8,
5168 .n_lsb = 1,
5169 .m_msb = 20,
5170 .m_lsb = 9,
5171
5172 .mX_msb[0] = 25,
5173 .mX_lsb[0] = 21,
5174 .mX_msb[1] = 30,
5175 .mX_lsb[1] = 26,
5176
5177 .has_stopmode = true,
5178 .has_freqsel = false,
5179 .has_selfreqdco = false,
5180 .has_refsel = false,
5181 };
5182
5183 static const struct dss_pll_hw dss_omap5_dsi_pll_hw = {
5184 .type = DSS_PLL_TYPE_A,
5185
5186 .n_max = (1 << 8) - 1,
5187 .m_max = (1 << 12) - 1,
5188 .mX_max = (1 << 5) - 1,
5189 .fint_min = 150000,
5190 .fint_max = 52000000,
5191 .clkdco_low = 1000000000,
5192 .clkdco_max = 1800000000,
5193
5194 .n_msb = 8,
5195 .n_lsb = 1,
5196 .m_msb = 20,
5197 .m_lsb = 9,
5198
5199 .mX_msb[0] = 25,
5200 .mX_lsb[0] = 21,
5201 .mX_msb[1] = 30,
5202 .mX_lsb[1] = 26,
5203
5204 .has_stopmode = true,
5205 .has_freqsel = false,
5206 .has_selfreqdco = true,
5207 .has_refsel = true,
5208 };
5209
dsi_init_pll_data(struct dss_device * dss,struct dsi_data * dsi)5210 static int dsi_init_pll_data(struct dss_device *dss, struct dsi_data *dsi)
5211 {
5212 struct dss_pll *pll = &dsi->pll;
5213 struct clk *clk;
5214 int r;
5215
5216 clk = devm_clk_get(dsi->dev, "sys_clk");
5217 if (IS_ERR(clk)) {
5218 DSSERR("can't get sys_clk\n");
5219 return PTR_ERR(clk);
5220 }
5221
5222 pll->name = dsi->module_id == 0 ? "dsi0" : "dsi1";
5223 pll->id = dsi->module_id == 0 ? DSS_PLL_DSI1 : DSS_PLL_DSI2;
5224 pll->clkin = clk;
5225 pll->base = dsi->pll_base;
5226 pll->hw = dsi->data->pll_hw;
5227 pll->ops = &dsi_pll_ops;
5228
5229 r = dss_pll_register(dss, pll);
5230 if (r)
5231 return r;
5232
5233 return 0;
5234 }
5235
5236 /* DSI1 HW IP initialisation */
5237 static const struct dsi_of_data dsi_of_data_omap34xx = {
5238 .model = DSI_MODEL_OMAP3,
5239 .pll_hw = &dss_omap3_dsi_pll_hw,
5240 .modules = (const struct dsi_module_id_data[]) {
5241 { .address = 0x4804fc00, .id = 0, },
5242 { },
5243 },
5244 .max_fck_freq = 173000000,
5245 .max_pll_lpdiv = (1 << 13) - 1,
5246 .quirks = DSI_QUIRK_REVERSE_TXCLKESC,
5247 };
5248
5249 static const struct dsi_of_data dsi_of_data_omap36xx = {
5250 .model = DSI_MODEL_OMAP3,
5251 .pll_hw = &dss_omap3_dsi_pll_hw,
5252 .modules = (const struct dsi_module_id_data[]) {
5253 { .address = 0x4804fc00, .id = 0, },
5254 { },
5255 },
5256 .max_fck_freq = 173000000,
5257 .max_pll_lpdiv = (1 << 13) - 1,
5258 .quirks = DSI_QUIRK_PLL_PWR_BUG,
5259 };
5260
5261 static const struct dsi_of_data dsi_of_data_omap4 = {
5262 .model = DSI_MODEL_OMAP4,
5263 .pll_hw = &dss_omap4_dsi_pll_hw,
5264 .modules = (const struct dsi_module_id_data[]) {
5265 { .address = 0x58004000, .id = 0, },
5266 { .address = 0x58005000, .id = 1, },
5267 { },
5268 },
5269 .max_fck_freq = 170000000,
5270 .max_pll_lpdiv = (1 << 13) - 1,
5271 .quirks = DSI_QUIRK_DCS_CMD_CONFIG_VC | DSI_QUIRK_VC_OCP_WIDTH
5272 | DSI_QUIRK_GNQ,
5273 };
5274
5275 static const struct dsi_of_data dsi_of_data_omap5 = {
5276 .model = DSI_MODEL_OMAP5,
5277 .pll_hw = &dss_omap5_dsi_pll_hw,
5278 .modules = (const struct dsi_module_id_data[]) {
5279 { .address = 0x58004000, .id = 0, },
5280 { .address = 0x58009000, .id = 1, },
5281 { },
5282 },
5283 .max_fck_freq = 209250000,
5284 .max_pll_lpdiv = (1 << 13) - 1,
5285 .quirks = DSI_QUIRK_DCS_CMD_CONFIG_VC | DSI_QUIRK_VC_OCP_WIDTH
5286 | DSI_QUIRK_GNQ | DSI_QUIRK_PHY_DCC,
5287 };
5288
5289 static const struct of_device_id dsi_of_match[] = {
5290 { .compatible = "ti,omap3-dsi", .data = &dsi_of_data_omap36xx, },
5291 { .compatible = "ti,omap4-dsi", .data = &dsi_of_data_omap4, },
5292 { .compatible = "ti,omap5-dsi", .data = &dsi_of_data_omap5, },
5293 {},
5294 };
5295
5296 static const struct soc_device_attribute dsi_soc_devices[] = {
5297 { .machine = "OMAP3[45]*", .data = &dsi_of_data_omap34xx },
5298 { .machine = "AM35*", .data = &dsi_of_data_omap34xx },
5299 { /* sentinel */ }
5300 };
5301
dsi_bind(struct device * dev,struct device * master,void * data)5302 static int dsi_bind(struct device *dev, struct device *master, void *data)
5303 {
5304 struct platform_device *pdev = to_platform_device(dev);
5305 struct dss_device *dss = dss_get_device(master);
5306 const struct soc_device_attribute *soc;
5307 const struct dsi_module_id_data *d;
5308 u32 rev;
5309 int r, i;
5310 struct dsi_data *dsi;
5311 struct resource *dsi_mem;
5312 struct resource *res;
5313
5314 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
5315 if (!dsi)
5316 return -ENOMEM;
5317
5318 dsi->dss = dss;
5319 dsi->dev = dev;
5320 dev_set_drvdata(dev, dsi);
5321
5322 spin_lock_init(&dsi->irq_lock);
5323 spin_lock_init(&dsi->errors_lock);
5324 dsi->errors = 0;
5325
5326 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
5327 spin_lock_init(&dsi->irq_stats_lock);
5328 dsi->irq_stats.last_reset = jiffies;
5329 #endif
5330
5331 mutex_init(&dsi->lock);
5332 sema_init(&dsi->bus_lock, 1);
5333
5334 INIT_DEFERRABLE_WORK(&dsi->framedone_timeout_work,
5335 dsi_framedone_timeout_work_callback);
5336
5337 #ifdef DSI_CATCH_MISSING_TE
5338 timer_setup(&dsi->te_timer, dsi_te_timeout, 0);
5339 #endif
5340
5341 dsi_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "proto");
5342 dsi->proto_base = devm_ioremap_resource(dev, dsi_mem);
5343 if (IS_ERR(dsi->proto_base))
5344 return PTR_ERR(dsi->proto_base);
5345
5346 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
5347 dsi->phy_base = devm_ioremap_resource(dev, res);
5348 if (IS_ERR(dsi->phy_base))
5349 return PTR_ERR(dsi->phy_base);
5350
5351 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll");
5352 dsi->pll_base = devm_ioremap_resource(dev, res);
5353 if (IS_ERR(dsi->pll_base))
5354 return PTR_ERR(dsi->pll_base);
5355
5356 dsi->irq = platform_get_irq(pdev, 0);
5357 if (dsi->irq < 0) {
5358 DSSERR("platform_get_irq failed\n");
5359 return -ENODEV;
5360 }
5361
5362 r = devm_request_irq(dev, dsi->irq, omap_dsi_irq_handler,
5363 IRQF_SHARED, dev_name(dev), dsi);
5364 if (r < 0) {
5365 DSSERR("request_irq failed\n");
5366 return r;
5367 }
5368
5369 soc = soc_device_match(dsi_soc_devices);
5370 if (soc)
5371 dsi->data = soc->data;
5372 else
5373 dsi->data = of_match_node(dsi_of_match, dev->of_node)->data;
5374
5375 d = dsi->data->modules;
5376 while (d->address != 0 && d->address != dsi_mem->start)
5377 d++;
5378
5379 if (d->address == 0) {
5380 DSSERR("unsupported DSI module\n");
5381 return -ENODEV;
5382 }
5383
5384 dsi->module_id = d->id;
5385
5386 if (dsi->data->model == DSI_MODEL_OMAP4 ||
5387 dsi->data->model == DSI_MODEL_OMAP5) {
5388 struct device_node *np;
5389
5390 /*
5391 * The OMAP4/5 display DT bindings don't reference the padconf
5392 * syscon. Our only option to retrieve it is to find it by name.
5393 */
5394 np = of_find_node_by_name(NULL,
5395 dsi->data->model == DSI_MODEL_OMAP4 ?
5396 "omap4_padconf_global" : "omap5_padconf_global");
5397 if (!np)
5398 return -ENODEV;
5399
5400 dsi->syscon = syscon_node_to_regmap(np);
5401 of_node_put(np);
5402 }
5403
5404 /* DSI VCs initialization */
5405 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
5406 dsi->vc[i].source = DSI_VC_SOURCE_L4;
5407 dsi->vc[i].dssdev = NULL;
5408 dsi->vc[i].vc_id = 0;
5409 }
5410
5411 r = dsi_get_clocks(dsi);
5412 if (r)
5413 return r;
5414
5415 dsi_init_pll_data(dss, dsi);
5416
5417 pm_runtime_enable(dev);
5418
5419 r = dsi_runtime_get(dsi);
5420 if (r)
5421 goto err_runtime_get;
5422
5423 rev = dsi_read_reg(dsi, DSI_REVISION);
5424 dev_dbg(dev, "OMAP DSI rev %d.%d\n",
5425 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
5426
5427 /* DSI on OMAP3 doesn't have register DSI_GNQ, set number
5428 * of data to 3 by default */
5429 if (dsi->data->quirks & DSI_QUIRK_GNQ)
5430 /* NB_DATA_LANES */
5431 dsi->num_lanes_supported = 1 + REG_GET(dsi, DSI_GNQ, 11, 9);
5432 else
5433 dsi->num_lanes_supported = 3;
5434
5435 dsi->line_buffer_size = dsi_get_line_buf_size(dsi);
5436
5437 dsi_init_output(dsi);
5438
5439 r = dsi_probe_of(dsi);
5440 if (r) {
5441 DSSERR("Invalid DSI DT data\n");
5442 goto err_probe_of;
5443 }
5444
5445 r = of_platform_populate(dev->of_node, NULL, NULL, dev);
5446 if (r)
5447 DSSERR("Failed to populate DSI child devices: %d\n", r);
5448
5449 dsi_runtime_put(dsi);
5450
5451 if (dsi->module_id == 0)
5452 dsi->debugfs.regs = dss_debugfs_create_file(dss, "dsi1_regs",
5453 dsi1_dump_regs,
5454 &dsi);
5455 else
5456 dsi->debugfs.regs = dss_debugfs_create_file(dss, "dsi2_regs",
5457 dsi2_dump_regs,
5458 &dsi);
5459 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
5460 if (dsi->module_id == 0)
5461 dsi->debugfs.irqs = dss_debugfs_create_file(dss, "dsi1_irqs",
5462 dsi1_dump_irqs,
5463 &dsi);
5464 else
5465 dsi->debugfs.irqs = dss_debugfs_create_file(dss, "dsi2_irqs",
5466 dsi2_dump_irqs,
5467 &dsi);
5468 #endif
5469
5470 return 0;
5471
5472 err_probe_of:
5473 dsi_uninit_output(dsi);
5474 dsi_runtime_put(dsi);
5475
5476 err_runtime_get:
5477 pm_runtime_disable(dev);
5478 return r;
5479 }
5480
dsi_unbind(struct device * dev,struct device * master,void * data)5481 static void dsi_unbind(struct device *dev, struct device *master, void *data)
5482 {
5483 struct dsi_data *dsi = dev_get_drvdata(dev);
5484
5485 dss_debugfs_remove_file(dsi->debugfs.irqs);
5486 dss_debugfs_remove_file(dsi->debugfs.regs);
5487
5488 of_platform_depopulate(dev);
5489
5490 WARN_ON(dsi->scp_clk_refcount > 0);
5491
5492 dss_pll_unregister(&dsi->pll);
5493
5494 dsi_uninit_output(dsi);
5495
5496 pm_runtime_disable(dev);
5497
5498 if (dsi->vdds_dsi_reg != NULL && dsi->vdds_dsi_enabled) {
5499 regulator_disable(dsi->vdds_dsi_reg);
5500 dsi->vdds_dsi_enabled = false;
5501 }
5502 }
5503
5504 static const struct component_ops dsi_component_ops = {
5505 .bind = dsi_bind,
5506 .unbind = dsi_unbind,
5507 };
5508
dsi_probe(struct platform_device * pdev)5509 static int dsi_probe(struct platform_device *pdev)
5510 {
5511 return component_add(&pdev->dev, &dsi_component_ops);
5512 }
5513
dsi_remove(struct platform_device * pdev)5514 static int dsi_remove(struct platform_device *pdev)
5515 {
5516 component_del(&pdev->dev, &dsi_component_ops);
5517 return 0;
5518 }
5519
dsi_runtime_suspend(struct device * dev)5520 static int dsi_runtime_suspend(struct device *dev)
5521 {
5522 struct dsi_data *dsi = dev_get_drvdata(dev);
5523
5524 dsi->is_enabled = false;
5525 /* ensure the irq handler sees the is_enabled value */
5526 smp_wmb();
5527 /* wait for current handler to finish before turning the DSI off */
5528 synchronize_irq(dsi->irq);
5529
5530 dispc_runtime_put(dsi->dss->dispc);
5531
5532 return 0;
5533 }
5534
dsi_runtime_resume(struct device * dev)5535 static int dsi_runtime_resume(struct device *dev)
5536 {
5537 struct dsi_data *dsi = dev_get_drvdata(dev);
5538 int r;
5539
5540 r = dispc_runtime_get(dsi->dss->dispc);
5541 if (r)
5542 return r;
5543
5544 dsi->is_enabled = true;
5545 /* ensure the irq handler sees the is_enabled value */
5546 smp_wmb();
5547
5548 return 0;
5549 }
5550
5551 static const struct dev_pm_ops dsi_pm_ops = {
5552 .runtime_suspend = dsi_runtime_suspend,
5553 .runtime_resume = dsi_runtime_resume,
5554 };
5555
5556 struct platform_driver omap_dsihw_driver = {
5557 .probe = dsi_probe,
5558 .remove = dsi_remove,
5559 .driver = {
5560 .name = "omapdss_dsi",
5561 .pm = &dsi_pm_ops,
5562 .of_match_table = dsi_of_match,
5563 .suppress_bind_attrs = true,
5564 },
5565 };
5566