1 /*
2 * Samsung HDMI interface driver
3 *
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
5 *
6 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published
10 * by the Free Software Foundiation. either version 2 of the License,
11 * or (at your option) any later version
12 */
13
14 #define pr_fmt(fmt) "s5p-tv (hdmi_drv): " fmt
15
16 #ifdef CONFIG_VIDEO_SAMSUNG_S5P_HDMI_DEBUG
17 #define DEBUG
18 #endif
19
20 #include <linux/kernel.h>
21 #include <linux/slab.h>
22 #include <linux/io.h>
23 #include <linux/i2c.h>
24 #include <linux/platform_device.h>
25 #include <media/v4l2-subdev.h>
26 #include <linux/module.h>
27 #include <linux/interrupt.h>
28 #include <linux/irq.h>
29 #include <linux/delay.h>
30 #include <linux/bug.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/clk.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/v4l2-dv-timings.h>
35
36 #include <media/s5p_hdmi.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-dev.h>
39 #include <media/v4l2-device.h>
40
41 #include "regs-hdmi.h"
42
43 MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
44 MODULE_DESCRIPTION("Samsung HDMI");
45 MODULE_LICENSE("GPL");
46
47 struct hdmi_pulse {
48 u32 beg;
49 u32 end;
50 };
51
52 struct hdmi_timings {
53 struct hdmi_pulse hact;
54 u32 hsyn_pol; /* 0 - high, 1 - low */
55 struct hdmi_pulse hsyn;
56 u32 interlaced;
57 struct hdmi_pulse vact[2];
58 u32 vsyn_pol; /* 0 - high, 1 - low */
59 u32 vsyn_off;
60 struct hdmi_pulse vsyn[2];
61 };
62
63 struct hdmi_resources {
64 struct clk *hdmi;
65 struct clk *sclk_hdmi;
66 struct clk *sclk_pixel;
67 struct clk *sclk_hdmiphy;
68 struct clk *hdmiphy;
69 struct regulator_bulk_data *regul_bulk;
70 int regul_count;
71 };
72
73 struct hdmi_device {
74 /** base address of HDMI registers */
75 void __iomem *regs;
76 /** HDMI interrupt */
77 unsigned int irq;
78 /** pointer to device parent */
79 struct device *dev;
80 /** subdev generated by HDMI device */
81 struct v4l2_subdev sd;
82 /** V4L2 device structure */
83 struct v4l2_device v4l2_dev;
84 /** subdev of HDMIPHY interface */
85 struct v4l2_subdev *phy_sd;
86 /** subdev of MHL interface */
87 struct v4l2_subdev *mhl_sd;
88 /** configuration of current graphic mode */
89 const struct hdmi_timings *cur_conf;
90 /** flag indicating that timings are dirty */
91 int cur_conf_dirty;
92 /** current timings */
93 struct v4l2_dv_timings cur_timings;
94 /** other resources */
95 struct hdmi_resources res;
96 };
97
98 static struct platform_device_id hdmi_driver_types[] = {
99 {
100 .name = "s5pv210-hdmi",
101 }, {
102 .name = "exynos4-hdmi",
103 }, {
104 /* end node */
105 }
106 };
107
108 static const struct v4l2_subdev_ops hdmi_sd_ops;
109
sd_to_hdmi_dev(struct v4l2_subdev * sd)110 static struct hdmi_device *sd_to_hdmi_dev(struct v4l2_subdev *sd)
111 {
112 return container_of(sd, struct hdmi_device, sd);
113 }
114
115 static inline
hdmi_write(struct hdmi_device * hdev,u32 reg_id,u32 value)116 void hdmi_write(struct hdmi_device *hdev, u32 reg_id, u32 value)
117 {
118 writel(value, hdev->regs + reg_id);
119 }
120
121 static inline
hdmi_write_mask(struct hdmi_device * hdev,u32 reg_id,u32 value,u32 mask)122 void hdmi_write_mask(struct hdmi_device *hdev, u32 reg_id, u32 value, u32 mask)
123 {
124 u32 old = readl(hdev->regs + reg_id);
125 value = (value & mask) | (old & ~mask);
126 writel(value, hdev->regs + reg_id);
127 }
128
129 static inline
hdmi_writeb(struct hdmi_device * hdev,u32 reg_id,u8 value)130 void hdmi_writeb(struct hdmi_device *hdev, u32 reg_id, u8 value)
131 {
132 writeb(value, hdev->regs + reg_id);
133 }
134
135 static inline
hdmi_writebn(struct hdmi_device * hdev,u32 reg_id,int n,u32 value)136 void hdmi_writebn(struct hdmi_device *hdev, u32 reg_id, int n, u32 value)
137 {
138 switch (n) {
139 default:
140 writeb(value >> 24, hdev->regs + reg_id + 12);
141 case 3:
142 writeb(value >> 16, hdev->regs + reg_id + 8);
143 case 2:
144 writeb(value >> 8, hdev->regs + reg_id + 4);
145 case 1:
146 writeb(value >> 0, hdev->regs + reg_id + 0);
147 }
148 }
149
hdmi_read(struct hdmi_device * hdev,u32 reg_id)150 static inline u32 hdmi_read(struct hdmi_device *hdev, u32 reg_id)
151 {
152 return readl(hdev->regs + reg_id);
153 }
154
hdmi_irq_handler(int irq,void * dev_data)155 static irqreturn_t hdmi_irq_handler(int irq, void *dev_data)
156 {
157 struct hdmi_device *hdev = dev_data;
158 u32 intc_flag;
159
160 (void)irq;
161 intc_flag = hdmi_read(hdev, HDMI_INTC_FLAG);
162 /* clearing flags for HPD plug/unplug */
163 if (intc_flag & HDMI_INTC_FLAG_HPD_UNPLUG) {
164 pr_info("unplugged\n");
165 hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
166 HDMI_INTC_FLAG_HPD_UNPLUG);
167 }
168 if (intc_flag & HDMI_INTC_FLAG_HPD_PLUG) {
169 pr_info("plugged\n");
170 hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
171 HDMI_INTC_FLAG_HPD_PLUG);
172 }
173
174 return IRQ_HANDLED;
175 }
176
hdmi_reg_init(struct hdmi_device * hdev)177 static void hdmi_reg_init(struct hdmi_device *hdev)
178 {
179 /* enable HPD interrupts */
180 hdmi_write_mask(hdev, HDMI_INTC_CON, ~0, HDMI_INTC_EN_GLOBAL |
181 HDMI_INTC_EN_HPD_PLUG | HDMI_INTC_EN_HPD_UNPLUG);
182 /* choose DVI mode */
183 hdmi_write_mask(hdev, HDMI_MODE_SEL,
184 HDMI_MODE_DVI_EN, HDMI_MODE_MASK);
185 hdmi_write_mask(hdev, HDMI_CON_2, ~0,
186 HDMI_DVI_PERAMBLE_EN | HDMI_DVI_BAND_EN);
187 /* disable bluescreen */
188 hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_BLUE_SCR_EN);
189 /* choose bluescreen (fecal) color */
190 hdmi_writeb(hdev, HDMI_BLUE_SCREEN_0, 0x12);
191 hdmi_writeb(hdev, HDMI_BLUE_SCREEN_1, 0x34);
192 hdmi_writeb(hdev, HDMI_BLUE_SCREEN_2, 0x56);
193 }
194
hdmi_timing_apply(struct hdmi_device * hdev,const struct hdmi_timings * t)195 static void hdmi_timing_apply(struct hdmi_device *hdev,
196 const struct hdmi_timings *t)
197 {
198 /* setting core registers */
199 hdmi_writebn(hdev, HDMI_H_BLANK_0, 2, t->hact.beg);
200 hdmi_writebn(hdev, HDMI_H_SYNC_GEN_0, 3,
201 (t->hsyn_pol << 20) | (t->hsyn.end << 10) | t->hsyn.beg);
202 hdmi_writeb(hdev, HDMI_VSYNC_POL, t->vsyn_pol);
203 hdmi_writebn(hdev, HDMI_V_BLANK_0, 3,
204 (t->vact[0].beg << 11) | t->vact[0].end);
205 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_1_0, 3,
206 (t->vsyn[0].beg << 12) | t->vsyn[0].end);
207 if (t->interlaced) {
208 u32 vsyn_trans = t->hsyn.beg + t->vsyn_off;
209
210 hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 1);
211 hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
212 (t->hact.end << 12) | t->vact[1].end);
213 hdmi_writebn(hdev, HDMI_V_BLANK_F_0, 3,
214 (t->vact[1].end << 11) | t->vact[1].beg);
215 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_2_0, 3,
216 (t->vsyn[1].beg << 12) | t->vsyn[1].end);
217 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_3_0, 3,
218 (vsyn_trans << 12) | vsyn_trans);
219 } else {
220 hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 0);
221 hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
222 (t->hact.end << 12) | t->vact[0].end);
223 }
224
225 /* Timing generator registers */
226 hdmi_writebn(hdev, HDMI_TG_H_FSZ_L, 2, t->hact.end);
227 hdmi_writebn(hdev, HDMI_TG_HACT_ST_L, 2, t->hact.beg);
228 hdmi_writebn(hdev, HDMI_TG_HACT_SZ_L, 2, t->hact.end - t->hact.beg);
229 hdmi_writebn(hdev, HDMI_TG_VSYNC_L, 2, t->vsyn[0].beg);
230 hdmi_writebn(hdev, HDMI_TG_VACT_ST_L, 2, t->vact[0].beg);
231 hdmi_writebn(hdev, HDMI_TG_VACT_SZ_L, 2,
232 t->vact[0].end - t->vact[0].beg);
233 hdmi_writebn(hdev, HDMI_TG_VSYNC_TOP_HDMI_L, 2, t->vsyn[0].beg);
234 hdmi_writebn(hdev, HDMI_TG_FIELD_TOP_HDMI_L, 2, t->vsyn[0].beg);
235 if (t->interlaced) {
236 hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_FIELD_EN);
237 hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[1].end);
238 hdmi_writebn(hdev, HDMI_TG_VSYNC2_L, 2, t->vsyn[1].beg);
239 hdmi_writebn(hdev, HDMI_TG_FIELD_CHG_L, 2, t->vact[0].end);
240 hdmi_writebn(hdev, HDMI_TG_VACT_ST2_L, 2, t->vact[1].beg);
241 hdmi_writebn(hdev, HDMI_TG_VSYNC_BOT_HDMI_L, 2, t->vsyn[1].beg);
242 hdmi_writebn(hdev, HDMI_TG_FIELD_BOT_HDMI_L, 2, t->vsyn[1].beg);
243 } else {
244 hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_FIELD_EN);
245 hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[0].end);
246 }
247 }
248
hdmi_conf_apply(struct hdmi_device * hdmi_dev)249 static int hdmi_conf_apply(struct hdmi_device *hdmi_dev)
250 {
251 struct device *dev = hdmi_dev->dev;
252 const struct hdmi_timings *conf = hdmi_dev->cur_conf;
253 int ret;
254
255 dev_dbg(dev, "%s\n", __func__);
256
257 /* skip if conf is already synchronized with HW */
258 if (!hdmi_dev->cur_conf_dirty)
259 return 0;
260
261 /* reset hdmiphy */
262 hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
263 mdelay(10);
264 hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, 0, HDMI_PHY_SW_RSTOUT);
265 mdelay(10);
266
267 /* configure timings */
268 ret = v4l2_subdev_call(hdmi_dev->phy_sd, video, s_dv_timings,
269 &hdmi_dev->cur_timings);
270 if (ret) {
271 dev_err(dev, "failed to set timings\n");
272 return ret;
273 }
274
275 /* resetting HDMI core */
276 hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, 0, HDMI_CORE_SW_RSTOUT);
277 mdelay(10);
278 hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, ~0, HDMI_CORE_SW_RSTOUT);
279 mdelay(10);
280
281 hdmi_reg_init(hdmi_dev);
282
283 /* setting core registers */
284 hdmi_timing_apply(hdmi_dev, conf);
285
286 hdmi_dev->cur_conf_dirty = 0;
287
288 return 0;
289 }
290
hdmi_dumpregs(struct hdmi_device * hdev,char * prefix)291 static void hdmi_dumpregs(struct hdmi_device *hdev, char *prefix)
292 {
293 #define DUMPREG(reg_id) \
294 dev_dbg(hdev->dev, "%s:" #reg_id " = %08x\n", prefix, \
295 readl(hdev->regs + reg_id))
296
297 dev_dbg(hdev->dev, "%s: ---- CONTROL REGISTERS ----\n", prefix);
298 DUMPREG(HDMI_INTC_FLAG);
299 DUMPREG(HDMI_INTC_CON);
300 DUMPREG(HDMI_HPD_STATUS);
301 DUMPREG(HDMI_PHY_RSTOUT);
302 DUMPREG(HDMI_PHY_VPLL);
303 DUMPREG(HDMI_PHY_CMU);
304 DUMPREG(HDMI_CORE_RSTOUT);
305
306 dev_dbg(hdev->dev, "%s: ---- CORE REGISTERS ----\n", prefix);
307 DUMPREG(HDMI_CON_0);
308 DUMPREG(HDMI_CON_1);
309 DUMPREG(HDMI_CON_2);
310 DUMPREG(HDMI_SYS_STATUS);
311 DUMPREG(HDMI_PHY_STATUS);
312 DUMPREG(HDMI_STATUS_EN);
313 DUMPREG(HDMI_HPD);
314 DUMPREG(HDMI_MODE_SEL);
315 DUMPREG(HDMI_HPD_GEN);
316 DUMPREG(HDMI_DC_CONTROL);
317 DUMPREG(HDMI_VIDEO_PATTERN_GEN);
318
319 dev_dbg(hdev->dev, "%s: ---- CORE SYNC REGISTERS ----\n", prefix);
320 DUMPREG(HDMI_H_BLANK_0);
321 DUMPREG(HDMI_H_BLANK_1);
322 DUMPREG(HDMI_V_BLANK_0);
323 DUMPREG(HDMI_V_BLANK_1);
324 DUMPREG(HDMI_V_BLANK_2);
325 DUMPREG(HDMI_H_V_LINE_0);
326 DUMPREG(HDMI_H_V_LINE_1);
327 DUMPREG(HDMI_H_V_LINE_2);
328 DUMPREG(HDMI_VSYNC_POL);
329 DUMPREG(HDMI_INT_PRO_MODE);
330 DUMPREG(HDMI_V_BLANK_F_0);
331 DUMPREG(HDMI_V_BLANK_F_1);
332 DUMPREG(HDMI_V_BLANK_F_2);
333 DUMPREG(HDMI_H_SYNC_GEN_0);
334 DUMPREG(HDMI_H_SYNC_GEN_1);
335 DUMPREG(HDMI_H_SYNC_GEN_2);
336 DUMPREG(HDMI_V_SYNC_GEN_1_0);
337 DUMPREG(HDMI_V_SYNC_GEN_1_1);
338 DUMPREG(HDMI_V_SYNC_GEN_1_2);
339 DUMPREG(HDMI_V_SYNC_GEN_2_0);
340 DUMPREG(HDMI_V_SYNC_GEN_2_1);
341 DUMPREG(HDMI_V_SYNC_GEN_2_2);
342 DUMPREG(HDMI_V_SYNC_GEN_3_0);
343 DUMPREG(HDMI_V_SYNC_GEN_3_1);
344 DUMPREG(HDMI_V_SYNC_GEN_3_2);
345
346 dev_dbg(hdev->dev, "%s: ---- TG REGISTERS ----\n", prefix);
347 DUMPREG(HDMI_TG_CMD);
348 DUMPREG(HDMI_TG_H_FSZ_L);
349 DUMPREG(HDMI_TG_H_FSZ_H);
350 DUMPREG(HDMI_TG_HACT_ST_L);
351 DUMPREG(HDMI_TG_HACT_ST_H);
352 DUMPREG(HDMI_TG_HACT_SZ_L);
353 DUMPREG(HDMI_TG_HACT_SZ_H);
354 DUMPREG(HDMI_TG_V_FSZ_L);
355 DUMPREG(HDMI_TG_V_FSZ_H);
356 DUMPREG(HDMI_TG_VSYNC_L);
357 DUMPREG(HDMI_TG_VSYNC_H);
358 DUMPREG(HDMI_TG_VSYNC2_L);
359 DUMPREG(HDMI_TG_VSYNC2_H);
360 DUMPREG(HDMI_TG_VACT_ST_L);
361 DUMPREG(HDMI_TG_VACT_ST_H);
362 DUMPREG(HDMI_TG_VACT_SZ_L);
363 DUMPREG(HDMI_TG_VACT_SZ_H);
364 DUMPREG(HDMI_TG_FIELD_CHG_L);
365 DUMPREG(HDMI_TG_FIELD_CHG_H);
366 DUMPREG(HDMI_TG_VACT_ST2_L);
367 DUMPREG(HDMI_TG_VACT_ST2_H);
368 DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_L);
369 DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_H);
370 DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_L);
371 DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_H);
372 DUMPREG(HDMI_TG_FIELD_TOP_HDMI_L);
373 DUMPREG(HDMI_TG_FIELD_TOP_HDMI_H);
374 DUMPREG(HDMI_TG_FIELD_BOT_HDMI_L);
375 DUMPREG(HDMI_TG_FIELD_BOT_HDMI_H);
376 #undef DUMPREG
377 }
378
379 static const struct hdmi_timings hdmi_timings_480p = {
380 .hact = { .beg = 138, .end = 858 },
381 .hsyn_pol = 1,
382 .hsyn = { .beg = 16, .end = 16 + 62 },
383 .interlaced = 0,
384 .vact[0] = { .beg = 42 + 3, .end = 522 + 3 },
385 .vsyn_pol = 1,
386 .vsyn[0] = { .beg = 6 + 3, .end = 12 + 3},
387 };
388
389 static const struct hdmi_timings hdmi_timings_576p50 = {
390 .hact = { .beg = 144, .end = 864 },
391 .hsyn_pol = 1,
392 .hsyn = { .beg = 12, .end = 12 + 64 },
393 .interlaced = 0,
394 .vact[0] = { .beg = 44 + 5, .end = 620 + 5 },
395 .vsyn_pol = 1,
396 .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
397 };
398
399 static const struct hdmi_timings hdmi_timings_720p60 = {
400 .hact = { .beg = 370, .end = 1650 },
401 .hsyn_pol = 0,
402 .hsyn = { .beg = 110, .end = 110 + 40 },
403 .interlaced = 0,
404 .vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
405 .vsyn_pol = 0,
406 .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
407 };
408
409 static const struct hdmi_timings hdmi_timings_720p50 = {
410 .hact = { .beg = 700, .end = 1980 },
411 .hsyn_pol = 0,
412 .hsyn = { .beg = 440, .end = 440 + 40 },
413 .interlaced = 0,
414 .vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
415 .vsyn_pol = 0,
416 .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
417 };
418
419 static const struct hdmi_timings hdmi_timings_1080p24 = {
420 .hact = { .beg = 830, .end = 2750 },
421 .hsyn_pol = 0,
422 .hsyn = { .beg = 638, .end = 638 + 44 },
423 .interlaced = 0,
424 .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
425 .vsyn_pol = 0,
426 .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
427 };
428
429 static const struct hdmi_timings hdmi_timings_1080p60 = {
430 .hact = { .beg = 280, .end = 2200 },
431 .hsyn_pol = 0,
432 .hsyn = { .beg = 88, .end = 88 + 44 },
433 .interlaced = 0,
434 .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
435 .vsyn_pol = 0,
436 .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
437 };
438
439 static const struct hdmi_timings hdmi_timings_1080i60 = {
440 .hact = { .beg = 280, .end = 2200 },
441 .hsyn_pol = 0,
442 .hsyn = { .beg = 88, .end = 88 + 44 },
443 .interlaced = 1,
444 .vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
445 .vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
446 .vsyn_pol = 0,
447 .vsyn_off = 1100,
448 .vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
449 .vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
450 };
451
452 static const struct hdmi_timings hdmi_timings_1080i50 = {
453 .hact = { .beg = 720, .end = 2640 },
454 .hsyn_pol = 0,
455 .hsyn = { .beg = 528, .end = 528 + 44 },
456 .interlaced = 1,
457 .vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
458 .vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
459 .vsyn_pol = 0,
460 .vsyn_off = 1320,
461 .vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
462 .vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
463 };
464
465 static const struct hdmi_timings hdmi_timings_1080p50 = {
466 .hact = { .beg = 720, .end = 2640 },
467 .hsyn_pol = 0,
468 .hsyn = { .beg = 528, .end = 528 + 44 },
469 .interlaced = 0,
470 .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
471 .vsyn_pol = 0,
472 .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
473 };
474
475 /* default hdmi_timings index of the timings configured on probe */
476 #define HDMI_DEFAULT_TIMINGS_IDX (0)
477
478 static const struct {
479 bool reduced_fps;
480 const struct v4l2_dv_timings dv_timings;
481 const struct hdmi_timings *hdmi_timings;
482 } hdmi_timings[] = {
483 { false, V4L2_DV_BT_CEA_720X480P59_94, &hdmi_timings_480p },
484 { false, V4L2_DV_BT_CEA_720X576P50, &hdmi_timings_576p50 },
485 { false, V4L2_DV_BT_CEA_1280X720P50, &hdmi_timings_720p50 },
486 { true, V4L2_DV_BT_CEA_1280X720P60, &hdmi_timings_720p60 },
487 { false, V4L2_DV_BT_CEA_1920X1080P24, &hdmi_timings_1080p24 },
488 { false, V4L2_DV_BT_CEA_1920X1080P30, &hdmi_timings_1080p60 },
489 { false, V4L2_DV_BT_CEA_1920X1080P50, &hdmi_timings_1080p50 },
490 { false, V4L2_DV_BT_CEA_1920X1080I50, &hdmi_timings_1080i50 },
491 { false, V4L2_DV_BT_CEA_1920X1080I60, &hdmi_timings_1080i60 },
492 { false, V4L2_DV_BT_CEA_1920X1080P60, &hdmi_timings_1080p60 },
493 };
494
hdmi_streamon(struct hdmi_device * hdev)495 static int hdmi_streamon(struct hdmi_device *hdev)
496 {
497 struct device *dev = hdev->dev;
498 struct hdmi_resources *res = &hdev->res;
499 int ret, tries;
500
501 dev_dbg(dev, "%s\n", __func__);
502
503 ret = hdmi_conf_apply(hdev);
504 if (ret)
505 return ret;
506
507 ret = v4l2_subdev_call(hdev->phy_sd, video, s_stream, 1);
508 if (ret)
509 return ret;
510
511 /* waiting for HDMIPHY's PLL to get to steady state */
512 for (tries = 100; tries; --tries) {
513 u32 val = hdmi_read(hdev, HDMI_PHY_STATUS);
514 if (val & HDMI_PHY_STATUS_READY)
515 break;
516 mdelay(1);
517 }
518 /* steady state not achieved */
519 if (tries == 0) {
520 dev_err(dev, "hdmiphy's pll could not reach steady state.\n");
521 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
522 hdmi_dumpregs(hdev, "hdmiphy - s_stream");
523 return -EIO;
524 }
525
526 /* starting MHL */
527 ret = v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 1);
528 if (hdev->mhl_sd && ret) {
529 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
530 hdmi_dumpregs(hdev, "mhl - s_stream");
531 return -EIO;
532 }
533
534 /* hdmiphy clock is used for HDMI in streaming mode */
535 clk_disable(res->sclk_hdmi);
536 clk_set_parent(res->sclk_hdmi, res->sclk_hdmiphy);
537 clk_enable(res->sclk_hdmi);
538
539 /* enable HDMI and timing generator */
540 hdmi_write_mask(hdev, HDMI_CON_0, ~0, HDMI_EN);
541 hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_EN);
542 hdmi_dumpregs(hdev, "streamon");
543 return 0;
544 }
545
hdmi_streamoff(struct hdmi_device * hdev)546 static int hdmi_streamoff(struct hdmi_device *hdev)
547 {
548 struct device *dev = hdev->dev;
549 struct hdmi_resources *res = &hdev->res;
550
551 dev_dbg(dev, "%s\n", __func__);
552
553 hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_EN);
554 hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_EN);
555
556 /* pixel(vpll) clock is used for HDMI in config mode */
557 clk_disable(res->sclk_hdmi);
558 clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
559 clk_enable(res->sclk_hdmi);
560
561 v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 0);
562 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
563
564 hdmi_dumpregs(hdev, "streamoff");
565 return 0;
566 }
567
hdmi_s_stream(struct v4l2_subdev * sd,int enable)568 static int hdmi_s_stream(struct v4l2_subdev *sd, int enable)
569 {
570 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
571 struct device *dev = hdev->dev;
572
573 dev_dbg(dev, "%s(%d)\n", __func__, enable);
574 if (enable)
575 return hdmi_streamon(hdev);
576 return hdmi_streamoff(hdev);
577 }
578
hdmi_resource_poweron(struct hdmi_resources * res)579 static void hdmi_resource_poweron(struct hdmi_resources *res)
580 {
581 /* turn HDMI power on */
582 regulator_bulk_enable(res->regul_count, res->regul_bulk);
583 /* power-on hdmi physical interface */
584 clk_enable(res->hdmiphy);
585 /* use VPP as parent clock; HDMIPHY is not working yet */
586 clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
587 /* turn clocks on */
588 clk_enable(res->sclk_hdmi);
589 }
590
hdmi_resource_poweroff(struct hdmi_resources * res)591 static void hdmi_resource_poweroff(struct hdmi_resources *res)
592 {
593 /* turn clocks off */
594 clk_disable(res->sclk_hdmi);
595 /* power-off hdmiphy */
596 clk_disable(res->hdmiphy);
597 /* turn HDMI power off */
598 regulator_bulk_disable(res->regul_count, res->regul_bulk);
599 }
600
hdmi_s_power(struct v4l2_subdev * sd,int on)601 static int hdmi_s_power(struct v4l2_subdev *sd, int on)
602 {
603 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
604 int ret;
605
606 if (on)
607 ret = pm_runtime_get_sync(hdev->dev);
608 else
609 ret = pm_runtime_put_sync(hdev->dev);
610 /* only values < 0 indicate errors */
611 return IS_ERR_VALUE(ret) ? ret : 0;
612 }
613
hdmi_s_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)614 static int hdmi_s_dv_timings(struct v4l2_subdev *sd,
615 struct v4l2_dv_timings *timings)
616 {
617 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
618 struct device *dev = hdev->dev;
619 int i;
620
621 for (i = 0; i < ARRAY_SIZE(hdmi_timings); i++)
622 if (v4l_match_dv_timings(&hdmi_timings[i].dv_timings,
623 timings, 0))
624 break;
625 if (i == ARRAY_SIZE(hdmi_timings)) {
626 dev_err(dev, "timings not supported\n");
627 return -EINVAL;
628 }
629 hdev->cur_conf = hdmi_timings[i].hdmi_timings;
630 hdev->cur_conf_dirty = 1;
631 hdev->cur_timings = *timings;
632 if (!hdmi_timings[i].reduced_fps)
633 hdev->cur_timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
634 return 0;
635 }
636
hdmi_g_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)637 static int hdmi_g_dv_timings(struct v4l2_subdev *sd,
638 struct v4l2_dv_timings *timings)
639 {
640 *timings = sd_to_hdmi_dev(sd)->cur_timings;
641 return 0;
642 }
643
hdmi_g_mbus_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * fmt)644 static int hdmi_g_mbus_fmt(struct v4l2_subdev *sd,
645 struct v4l2_mbus_framefmt *fmt)
646 {
647 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
648 const struct hdmi_timings *t = hdev->cur_conf;
649
650 dev_dbg(hdev->dev, "%s\n", __func__);
651 if (!hdev->cur_conf)
652 return -EINVAL;
653 memset(fmt, 0, sizeof(*fmt));
654 fmt->width = t->hact.end - t->hact.beg;
655 fmt->height = t->vact[0].end - t->vact[0].beg;
656 fmt->code = V4L2_MBUS_FMT_FIXED; /* means RGB888 */
657 fmt->colorspace = V4L2_COLORSPACE_SRGB;
658 if (t->interlaced) {
659 fmt->field = V4L2_FIELD_INTERLACED;
660 fmt->height *= 2;
661 } else {
662 fmt->field = V4L2_FIELD_NONE;
663 }
664 return 0;
665 }
666
hdmi_enum_dv_timings(struct v4l2_subdev * sd,struct v4l2_enum_dv_timings * timings)667 static int hdmi_enum_dv_timings(struct v4l2_subdev *sd,
668 struct v4l2_enum_dv_timings *timings)
669 {
670 if (timings->index >= ARRAY_SIZE(hdmi_timings))
671 return -EINVAL;
672 timings->timings = hdmi_timings[timings->index].dv_timings;
673 if (!hdmi_timings[timings->index].reduced_fps)
674 timings->timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
675 return 0;
676 }
677
hdmi_dv_timings_cap(struct v4l2_subdev * sd,struct v4l2_dv_timings_cap * cap)678 static int hdmi_dv_timings_cap(struct v4l2_subdev *sd,
679 struct v4l2_dv_timings_cap *cap)
680 {
681 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
682
683 /* Let the phy fill in the pixelclock range */
684 v4l2_subdev_call(hdev->phy_sd, video, dv_timings_cap, cap);
685 cap->type = V4L2_DV_BT_656_1120;
686 cap->bt.min_width = 720;
687 cap->bt.max_width = 1920;
688 cap->bt.min_height = 480;
689 cap->bt.max_height = 1080;
690 cap->bt.standards = V4L2_DV_BT_STD_CEA861;
691 cap->bt.capabilities = V4L2_DV_BT_CAP_INTERLACED |
692 V4L2_DV_BT_CAP_PROGRESSIVE;
693 return 0;
694 }
695
696 static const struct v4l2_subdev_core_ops hdmi_sd_core_ops = {
697 .s_power = hdmi_s_power,
698 };
699
700 static const struct v4l2_subdev_video_ops hdmi_sd_video_ops = {
701 .s_dv_timings = hdmi_s_dv_timings,
702 .g_dv_timings = hdmi_g_dv_timings,
703 .enum_dv_timings = hdmi_enum_dv_timings,
704 .dv_timings_cap = hdmi_dv_timings_cap,
705 .g_mbus_fmt = hdmi_g_mbus_fmt,
706 .s_stream = hdmi_s_stream,
707 };
708
709 static const struct v4l2_subdev_ops hdmi_sd_ops = {
710 .core = &hdmi_sd_core_ops,
711 .video = &hdmi_sd_video_ops,
712 };
713
hdmi_runtime_suspend(struct device * dev)714 static int hdmi_runtime_suspend(struct device *dev)
715 {
716 struct v4l2_subdev *sd = dev_get_drvdata(dev);
717 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
718
719 dev_dbg(dev, "%s\n", __func__);
720 v4l2_subdev_call(hdev->mhl_sd, core, s_power, 0);
721 hdmi_resource_poweroff(&hdev->res);
722 /* flag that device context is lost */
723 hdev->cur_conf_dirty = 1;
724 return 0;
725 }
726
hdmi_runtime_resume(struct device * dev)727 static int hdmi_runtime_resume(struct device *dev)
728 {
729 struct v4l2_subdev *sd = dev_get_drvdata(dev);
730 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
731 int ret = 0;
732
733 dev_dbg(dev, "%s\n", __func__);
734
735 hdmi_resource_poweron(&hdev->res);
736
737 /* starting MHL */
738 ret = v4l2_subdev_call(hdev->mhl_sd, core, s_power, 1);
739 if (hdev->mhl_sd && ret)
740 goto fail;
741
742 dev_dbg(dev, "poweron succeed\n");
743
744 return 0;
745
746 fail:
747 hdmi_resource_poweroff(&hdev->res);
748 dev_err(dev, "poweron failed\n");
749
750 return ret;
751 }
752
753 static const struct dev_pm_ops hdmi_pm_ops = {
754 .runtime_suspend = hdmi_runtime_suspend,
755 .runtime_resume = hdmi_runtime_resume,
756 };
757
hdmi_resources_cleanup(struct hdmi_device * hdev)758 static void hdmi_resources_cleanup(struct hdmi_device *hdev)
759 {
760 struct hdmi_resources *res = &hdev->res;
761
762 dev_dbg(hdev->dev, "HDMI resource cleanup\n");
763 /* put clocks, power */
764 if (res->regul_count)
765 regulator_bulk_free(res->regul_count, res->regul_bulk);
766 /* kfree is NULL-safe */
767 kfree(res->regul_bulk);
768 if (!IS_ERR_OR_NULL(res->hdmiphy))
769 clk_put(res->hdmiphy);
770 if (!IS_ERR_OR_NULL(res->sclk_hdmiphy))
771 clk_put(res->sclk_hdmiphy);
772 if (!IS_ERR_OR_NULL(res->sclk_pixel))
773 clk_put(res->sclk_pixel);
774 if (!IS_ERR_OR_NULL(res->sclk_hdmi))
775 clk_put(res->sclk_hdmi);
776 if (!IS_ERR_OR_NULL(res->hdmi))
777 clk_put(res->hdmi);
778 memset(res, 0, sizeof(*res));
779 }
780
hdmi_resources_init(struct hdmi_device * hdev)781 static int hdmi_resources_init(struct hdmi_device *hdev)
782 {
783 struct device *dev = hdev->dev;
784 struct hdmi_resources *res = &hdev->res;
785 static char *supply[] = {
786 "hdmi-en",
787 "vdd",
788 "vdd_osc",
789 "vdd_pll",
790 };
791 int i, ret;
792
793 dev_dbg(dev, "HDMI resource init\n");
794
795 memset(res, 0, sizeof(*res));
796 /* get clocks, power */
797
798 res->hdmi = clk_get(dev, "hdmi");
799 if (IS_ERR(res->hdmi)) {
800 dev_err(dev, "failed to get clock 'hdmi'\n");
801 goto fail;
802 }
803 res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
804 if (IS_ERR(res->sclk_hdmi)) {
805 dev_err(dev, "failed to get clock 'sclk_hdmi'\n");
806 goto fail;
807 }
808 res->sclk_pixel = clk_get(dev, "sclk_pixel");
809 if (IS_ERR(res->sclk_pixel)) {
810 dev_err(dev, "failed to get clock 'sclk_pixel'\n");
811 goto fail;
812 }
813 res->sclk_hdmiphy = clk_get(dev, "sclk_hdmiphy");
814 if (IS_ERR(res->sclk_hdmiphy)) {
815 dev_err(dev, "failed to get clock 'sclk_hdmiphy'\n");
816 goto fail;
817 }
818 res->hdmiphy = clk_get(dev, "hdmiphy");
819 if (IS_ERR(res->hdmiphy)) {
820 dev_err(dev, "failed to get clock 'hdmiphy'\n");
821 goto fail;
822 }
823 res->regul_bulk = kcalloc(ARRAY_SIZE(supply),
824 sizeof(res->regul_bulk[0]), GFP_KERNEL);
825 if (!res->regul_bulk) {
826 dev_err(dev, "failed to get memory for regulators\n");
827 goto fail;
828 }
829 for (i = 0; i < ARRAY_SIZE(supply); ++i) {
830 res->regul_bulk[i].supply = supply[i];
831 res->regul_bulk[i].consumer = NULL;
832 }
833
834 ret = regulator_bulk_get(dev, ARRAY_SIZE(supply), res->regul_bulk);
835 if (ret) {
836 dev_err(dev, "failed to get regulators\n");
837 goto fail;
838 }
839 res->regul_count = ARRAY_SIZE(supply);
840
841 return 0;
842 fail:
843 dev_err(dev, "HDMI resource init - failed\n");
844 hdmi_resources_cleanup(hdev);
845 return -ENODEV;
846 }
847
hdmi_probe(struct platform_device * pdev)848 static int hdmi_probe(struct platform_device *pdev)
849 {
850 struct device *dev = &pdev->dev;
851 struct resource *res;
852 struct i2c_adapter *adapter;
853 struct v4l2_subdev *sd;
854 struct hdmi_device *hdmi_dev = NULL;
855 struct s5p_hdmi_platform_data *pdata = dev->platform_data;
856 int ret;
857
858 dev_dbg(dev, "probe start\n");
859
860 if (!pdata) {
861 dev_err(dev, "platform data is missing\n");
862 ret = -ENODEV;
863 goto fail;
864 }
865
866 hdmi_dev = devm_kzalloc(&pdev->dev, sizeof(*hdmi_dev), GFP_KERNEL);
867 if (!hdmi_dev) {
868 dev_err(dev, "out of memory\n");
869 ret = -ENOMEM;
870 goto fail;
871 }
872
873 hdmi_dev->dev = dev;
874
875 ret = hdmi_resources_init(hdmi_dev);
876 if (ret)
877 goto fail;
878
879 /* mapping HDMI registers */
880 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
881 if (res == NULL) {
882 dev_err(dev, "get memory resource failed.\n");
883 ret = -ENXIO;
884 goto fail_init;
885 }
886
887 hdmi_dev->regs = devm_ioremap(&pdev->dev, res->start,
888 resource_size(res));
889 if (hdmi_dev->regs == NULL) {
890 dev_err(dev, "register mapping failed.\n");
891 ret = -ENXIO;
892 goto fail_init;
893 }
894
895 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
896 if (res == NULL) {
897 dev_err(dev, "get interrupt resource failed.\n");
898 ret = -ENXIO;
899 goto fail_init;
900 }
901
902 ret = devm_request_irq(&pdev->dev, res->start, hdmi_irq_handler, 0,
903 "hdmi", hdmi_dev);
904 if (ret) {
905 dev_err(dev, "request interrupt failed.\n");
906 goto fail_init;
907 }
908 hdmi_dev->irq = res->start;
909
910 /* setting v4l2 name to prevent WARN_ON in v4l2_device_register */
911 strlcpy(hdmi_dev->v4l2_dev.name, dev_name(dev),
912 sizeof(hdmi_dev->v4l2_dev.name));
913 /* passing NULL owner prevents driver from erasing drvdata */
914 ret = v4l2_device_register(NULL, &hdmi_dev->v4l2_dev);
915 if (ret) {
916 dev_err(dev, "could not register v4l2 device.\n");
917 goto fail_init;
918 }
919
920 /* testing if hdmiphy info is present */
921 if (!pdata->hdmiphy_info) {
922 dev_err(dev, "hdmiphy info is missing in platform data\n");
923 ret = -ENXIO;
924 goto fail_vdev;
925 }
926
927 adapter = i2c_get_adapter(pdata->hdmiphy_bus);
928 if (adapter == NULL) {
929 dev_err(dev, "hdmiphy adapter request failed\n");
930 ret = -ENXIO;
931 goto fail_vdev;
932 }
933
934 hdmi_dev->phy_sd = v4l2_i2c_new_subdev_board(&hdmi_dev->v4l2_dev,
935 adapter, pdata->hdmiphy_info, NULL);
936 /* on failure or not adapter is no longer useful */
937 i2c_put_adapter(adapter);
938 if (hdmi_dev->phy_sd == NULL) {
939 dev_err(dev, "missing subdev for hdmiphy\n");
940 ret = -ENODEV;
941 goto fail_vdev;
942 }
943
944 /* initialization of MHL interface if present */
945 if (pdata->mhl_info) {
946 adapter = i2c_get_adapter(pdata->mhl_bus);
947 if (adapter == NULL) {
948 dev_err(dev, "MHL adapter request failed\n");
949 ret = -ENXIO;
950 goto fail_vdev;
951 }
952
953 hdmi_dev->mhl_sd = v4l2_i2c_new_subdev_board(
954 &hdmi_dev->v4l2_dev, adapter,
955 pdata->mhl_info, NULL);
956 /* on failure or not adapter is no longer useful */
957 i2c_put_adapter(adapter);
958 if (hdmi_dev->mhl_sd == NULL) {
959 dev_err(dev, "missing subdev for MHL\n");
960 ret = -ENODEV;
961 goto fail_vdev;
962 }
963 }
964
965 clk_enable(hdmi_dev->res.hdmi);
966
967 pm_runtime_enable(dev);
968
969 sd = &hdmi_dev->sd;
970 v4l2_subdev_init(sd, &hdmi_sd_ops);
971 sd->owner = THIS_MODULE;
972
973 strlcpy(sd->name, "s5p-hdmi", sizeof(sd->name));
974 hdmi_dev->cur_timings =
975 hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].dv_timings;
976 /* FIXME: missing fail timings is not supported */
977 hdmi_dev->cur_conf =
978 hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].hdmi_timings;
979 hdmi_dev->cur_conf_dirty = 1;
980
981 /* storing subdev for call that have only access to struct device */
982 dev_set_drvdata(dev, sd);
983
984 dev_info(dev, "probe successful\n");
985
986 return 0;
987
988 fail_vdev:
989 v4l2_device_unregister(&hdmi_dev->v4l2_dev);
990
991 fail_init:
992 hdmi_resources_cleanup(hdmi_dev);
993
994 fail:
995 dev_err(dev, "probe failed\n");
996 return ret;
997 }
998
hdmi_remove(struct platform_device * pdev)999 static int hdmi_remove(struct platform_device *pdev)
1000 {
1001 struct device *dev = &pdev->dev;
1002 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1003 struct hdmi_device *hdmi_dev = sd_to_hdmi_dev(sd);
1004
1005 pm_runtime_disable(dev);
1006 clk_disable(hdmi_dev->res.hdmi);
1007 v4l2_device_unregister(&hdmi_dev->v4l2_dev);
1008 disable_irq(hdmi_dev->irq);
1009 hdmi_resources_cleanup(hdmi_dev);
1010 dev_info(dev, "remove successful\n");
1011
1012 return 0;
1013 }
1014
1015 static struct platform_driver hdmi_driver __refdata = {
1016 .probe = hdmi_probe,
1017 .remove = hdmi_remove,
1018 .id_table = hdmi_driver_types,
1019 .driver = {
1020 .name = "s5p-hdmi",
1021 .owner = THIS_MODULE,
1022 .pm = &hdmi_pm_ops,
1023 }
1024 };
1025
1026 module_platform_driver(hdmi_driver);
1027