1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2016 Broadcom
4 */
5
6 /**
7 * DOC: VC4 SDTV module
8 *
9 * The VEC encoder generates PAL or NTSC composite video output.
10 *
11 * TV mode selection is done by an atomic property on the encoder,
12 * because a drm_mode_modeinfo is insufficient to distinguish between
13 * PAL and PAL-M or NTSC and NTSC-J.
14 */
15
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_drv.h>
18 #include <drm/drm_edid.h>
19 #include <drm/drm_panel.h>
20 #include <drm/drm_probe_helper.h>
21 #include <drm/drm_simple_kms_helper.h>
22 #include <linux/clk.h>
23 #include <linux/component.h>
24 #include <linux/of.h>
25 #include <linux/platform_device.h>
26 #include <linux/pm_runtime.h>
27
28 #include "vc4_drv.h"
29 #include "vc4_regs.h"
30
31 /* WSE Registers */
32 #define VEC_WSE_RESET 0xc0
33
34 #define VEC_WSE_CONTROL 0xc4
35 #define VEC_WSE_WSS_ENABLE BIT(7)
36
37 #define VEC_WSE_WSS_DATA 0xc8
38 #define VEC_WSE_VPS_DATA1 0xcc
39 #define VEC_WSE_VPS_CONTROL 0xd0
40
41 /* VEC Registers */
42 #define VEC_REVID 0x100
43
44 #define VEC_CONFIG0 0x104
45 #define VEC_CONFIG0_YDEL_MASK GENMASK(28, 26)
46 #define VEC_CONFIG0_YDEL(x) ((x) << 26)
47 #define VEC_CONFIG0_CDEL_MASK GENMASK(25, 24)
48 #define VEC_CONFIG0_CDEL(x) ((x) << 24)
49 #define VEC_CONFIG0_SECAM_STD BIT(21)
50 #define VEC_CONFIG0_PBPR_FIL BIT(18)
51 #define VEC_CONFIG0_CHROMA_GAIN_MASK GENMASK(17, 16)
52 #define VEC_CONFIG0_CHROMA_GAIN_UNITY (0 << 16)
53 #define VEC_CONFIG0_CHROMA_GAIN_1_32 (1 << 16)
54 #define VEC_CONFIG0_CHROMA_GAIN_1_16 (2 << 16)
55 #define VEC_CONFIG0_CHROMA_GAIN_1_8 (3 << 16)
56 #define VEC_CONFIG0_CBURST_GAIN_MASK GENMASK(14, 13)
57 #define VEC_CONFIG0_CBURST_GAIN_UNITY (0 << 13)
58 #define VEC_CONFIG0_CBURST_GAIN_1_128 (1 << 13)
59 #define VEC_CONFIG0_CBURST_GAIN_1_64 (2 << 13)
60 #define VEC_CONFIG0_CBURST_GAIN_1_32 (3 << 13)
61 #define VEC_CONFIG0_CHRBW1 BIT(11)
62 #define VEC_CONFIG0_CHRBW0 BIT(10)
63 #define VEC_CONFIG0_SYNCDIS BIT(9)
64 #define VEC_CONFIG0_BURDIS BIT(8)
65 #define VEC_CONFIG0_CHRDIS BIT(7)
66 #define VEC_CONFIG0_PDEN BIT(6)
67 #define VEC_CONFIG0_YCDELAY BIT(4)
68 #define VEC_CONFIG0_RAMPEN BIT(2)
69 #define VEC_CONFIG0_YCDIS BIT(2)
70 #define VEC_CONFIG0_STD_MASK GENMASK(1, 0)
71 #define VEC_CONFIG0_NTSC_STD 0
72 #define VEC_CONFIG0_PAL_BDGHI_STD 1
73 #define VEC_CONFIG0_PAL_M_STD 2
74 #define VEC_CONFIG0_PAL_N_STD 3
75
76 #define VEC_SCHPH 0x108
77 #define VEC_SOFT_RESET 0x10c
78 #define VEC_CLMP0_START 0x144
79 #define VEC_CLMP0_END 0x148
80
81 /*
82 * These set the color subcarrier frequency
83 * if VEC_CONFIG1_CUSTOM_FREQ is enabled.
84 *
85 * VEC_FREQ1_0 contains the most significant 16-bit half-word,
86 * VEC_FREQ3_2 contains the least significant 16-bit half-word.
87 * 0x80000000 seems to be equivalent to the pixel clock
88 * (which itself is the VEC clock divided by 8).
89 *
90 * Reference values (with the default pixel clock of 13.5 MHz):
91 *
92 * NTSC (3579545.[45] Hz) - 0x21F07C1F
93 * PAL (4433618.75 Hz) - 0x2A098ACB
94 * PAL-M (3575611.[888111] Hz) - 0x21E6EFE3
95 * PAL-N (3582056.25 Hz) - 0x21F69446
96 *
97 * NOTE: For SECAM, it is used as the Dr center frequency,
98 * regardless of whether VEC_CONFIG1_CUSTOM_FREQ is enabled or not;
99 * that is specified as 4406250 Hz, which corresponds to 0x29C71C72.
100 */
101 #define VEC_FREQ3_2 0x180
102 #define VEC_FREQ1_0 0x184
103
104 #define VEC_CONFIG1 0x188
105 #define VEC_CONFIG_VEC_RESYNC_OFF BIT(18)
106 #define VEC_CONFIG_RGB219 BIT(17)
107 #define VEC_CONFIG_CBAR_EN BIT(16)
108 #define VEC_CONFIG_TC_OBB BIT(15)
109 #define VEC_CONFIG1_OUTPUT_MODE_MASK GENMASK(12, 10)
110 #define VEC_CONFIG1_C_Y_CVBS (0 << 10)
111 #define VEC_CONFIG1_CVBS_Y_C (1 << 10)
112 #define VEC_CONFIG1_PR_Y_PB (2 << 10)
113 #define VEC_CONFIG1_RGB (4 << 10)
114 #define VEC_CONFIG1_Y_C_CVBS (5 << 10)
115 #define VEC_CONFIG1_C_CVBS_Y (6 << 10)
116 #define VEC_CONFIG1_C_CVBS_CVBS (7 << 10)
117 #define VEC_CONFIG1_DIS_CHR BIT(9)
118 #define VEC_CONFIG1_DIS_LUMA BIT(8)
119 #define VEC_CONFIG1_YCBCR_IN BIT(6)
120 #define VEC_CONFIG1_DITHER_TYPE_LFSR 0
121 #define VEC_CONFIG1_DITHER_TYPE_COUNTER BIT(5)
122 #define VEC_CONFIG1_DITHER_EN BIT(4)
123 #define VEC_CONFIG1_CYDELAY BIT(3)
124 #define VEC_CONFIG1_LUMADIS BIT(2)
125 #define VEC_CONFIG1_COMPDIS BIT(1)
126 #define VEC_CONFIG1_CUSTOM_FREQ BIT(0)
127
128 #define VEC_CONFIG2 0x18c
129 #define VEC_CONFIG2_PROG_SCAN BIT(15)
130 #define VEC_CONFIG2_SYNC_ADJ_MASK GENMASK(14, 12)
131 #define VEC_CONFIG2_SYNC_ADJ(x) (((x) / 2) << 12)
132 #define VEC_CONFIG2_PBPR_EN BIT(10)
133 #define VEC_CONFIG2_UV_DIG_DIS BIT(6)
134 #define VEC_CONFIG2_RGB_DIG_DIS BIT(5)
135 #define VEC_CONFIG2_TMUX_MASK GENMASK(3, 2)
136 #define VEC_CONFIG2_TMUX_DRIVE0 (0 << 2)
137 #define VEC_CONFIG2_TMUX_RG_COMP (1 << 2)
138 #define VEC_CONFIG2_TMUX_UV_YC (2 << 2)
139 #define VEC_CONFIG2_TMUX_SYNC_YC (3 << 2)
140
141 #define VEC_INTERRUPT_CONTROL 0x190
142 #define VEC_INTERRUPT_STATUS 0x194
143
144 /*
145 * Db center frequency for SECAM; the clock for this is the same as for
146 * VEC_FREQ3_2/VEC_FREQ1_0, which is used for Dr center frequency.
147 *
148 * This is specified as 4250000 Hz, which corresponds to 0x284BDA13.
149 * That is also the default value, so no need to set it explicitly.
150 */
151 #define VEC_FCW_SECAM_B 0x198
152 #define VEC_SECAM_GAIN_VAL 0x19c
153
154 #define VEC_CONFIG3 0x1a0
155 #define VEC_CONFIG3_HORIZ_LEN_STD (0 << 0)
156 #define VEC_CONFIG3_HORIZ_LEN_MPEG1_SIF (1 << 0)
157 #define VEC_CONFIG3_SHAPE_NON_LINEAR BIT(1)
158
159 #define VEC_STATUS0 0x200
160 #define VEC_MASK0 0x204
161
162 #define VEC_CFG 0x208
163 #define VEC_CFG_SG_MODE_MASK GENMASK(6, 5)
164 #define VEC_CFG_SG_MODE(x) ((x) << 5)
165 #define VEC_CFG_SG_EN BIT(4)
166 #define VEC_CFG_VEC_EN BIT(3)
167 #define VEC_CFG_MB_EN BIT(2)
168 #define VEC_CFG_ENABLE BIT(1)
169 #define VEC_CFG_TB_EN BIT(0)
170
171 #define VEC_DAC_TEST 0x20c
172
173 #define VEC_DAC_CONFIG 0x210
174 #define VEC_DAC_CONFIG_LDO_BIAS_CTRL(x) ((x) << 24)
175 #define VEC_DAC_CONFIG_DRIVER_CTRL(x) ((x) << 16)
176 #define VEC_DAC_CONFIG_DAC_CTRL(x) (x)
177
178 #define VEC_DAC_MISC 0x214
179 #define VEC_DAC_MISC_VCD_CTRL_MASK GENMASK(31, 16)
180 #define VEC_DAC_MISC_VCD_CTRL(x) ((x) << 16)
181 #define VEC_DAC_MISC_VID_ACT BIT(8)
182 #define VEC_DAC_MISC_VCD_PWRDN BIT(6)
183 #define VEC_DAC_MISC_BIAS_PWRDN BIT(5)
184 #define VEC_DAC_MISC_DAC_PWRDN BIT(2)
185 #define VEC_DAC_MISC_LDO_PWRDN BIT(1)
186 #define VEC_DAC_MISC_DAC_RST_N BIT(0)
187
188
189 struct vc4_vec_variant {
190 u32 dac_config;
191 };
192
193 /* General VEC hardware state. */
194 struct vc4_vec {
195 struct vc4_encoder encoder;
196 struct drm_connector connector;
197
198 struct platform_device *pdev;
199 const struct vc4_vec_variant *variant;
200
201 void __iomem *regs;
202
203 struct clk *clock;
204
205 struct drm_property *legacy_tv_mode_property;
206
207 struct debugfs_regset32 regset;
208 };
209
210 #define VEC_READ(offset) \
211 ({ \
212 kunit_fail_current_test("Accessing a register in a unit test!\n"); \
213 readl(vec->regs + (offset)); \
214 })
215
216 #define VEC_WRITE(offset, val) \
217 do { \
218 kunit_fail_current_test("Accessing a register in a unit test!\n"); \
219 writel(val, vec->regs + (offset)); \
220 } while (0)
221
222 #define encoder_to_vc4_vec(_encoder) \
223 container_of_const(_encoder, struct vc4_vec, encoder.base)
224
225 #define connector_to_vc4_vec(_connector) \
226 container_of_const(_connector, struct vc4_vec, connector)
227
228 enum vc4_vec_tv_mode_id {
229 VC4_VEC_TV_MODE_NTSC,
230 VC4_VEC_TV_MODE_NTSC_J,
231 VC4_VEC_TV_MODE_PAL,
232 VC4_VEC_TV_MODE_PAL_M,
233 VC4_VEC_TV_MODE_NTSC_443,
234 VC4_VEC_TV_MODE_PAL_60,
235 VC4_VEC_TV_MODE_PAL_N,
236 VC4_VEC_TV_MODE_SECAM,
237 };
238
239 struct vc4_vec_tv_mode {
240 unsigned int mode;
241 u16 expected_htotal;
242 u32 config0;
243 u32 config1;
244 u32 custom_freq;
245 };
246
247 static const struct debugfs_reg32 vec_regs[] = {
248 VC4_REG32(VEC_WSE_CONTROL),
249 VC4_REG32(VEC_WSE_WSS_DATA),
250 VC4_REG32(VEC_WSE_VPS_DATA1),
251 VC4_REG32(VEC_WSE_VPS_CONTROL),
252 VC4_REG32(VEC_REVID),
253 VC4_REG32(VEC_CONFIG0),
254 VC4_REG32(VEC_SCHPH),
255 VC4_REG32(VEC_CLMP0_START),
256 VC4_REG32(VEC_CLMP0_END),
257 VC4_REG32(VEC_FREQ3_2),
258 VC4_REG32(VEC_FREQ1_0),
259 VC4_REG32(VEC_CONFIG1),
260 VC4_REG32(VEC_CONFIG2),
261 VC4_REG32(VEC_INTERRUPT_CONTROL),
262 VC4_REG32(VEC_INTERRUPT_STATUS),
263 VC4_REG32(VEC_FCW_SECAM_B),
264 VC4_REG32(VEC_SECAM_GAIN_VAL),
265 VC4_REG32(VEC_CONFIG3),
266 VC4_REG32(VEC_STATUS0),
267 VC4_REG32(VEC_MASK0),
268 VC4_REG32(VEC_CFG),
269 VC4_REG32(VEC_DAC_TEST),
270 VC4_REG32(VEC_DAC_CONFIG),
271 VC4_REG32(VEC_DAC_MISC),
272 };
273
274 static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
275 {
276 .mode = DRM_MODE_TV_MODE_NTSC,
277 .expected_htotal = 858,
278 .config0 = VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN,
279 .config1 = VEC_CONFIG1_C_CVBS_CVBS,
280 },
281 {
282 .mode = DRM_MODE_TV_MODE_NTSC_443,
283 .expected_htotal = 858,
284 .config0 = VEC_CONFIG0_NTSC_STD,
285 .config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
286 .custom_freq = 0x2a098acb,
287 },
288 {
289 .mode = DRM_MODE_TV_MODE_NTSC_J,
290 .expected_htotal = 858,
291 .config0 = VEC_CONFIG0_NTSC_STD,
292 .config1 = VEC_CONFIG1_C_CVBS_CVBS,
293 },
294 {
295 .mode = DRM_MODE_TV_MODE_PAL,
296 .expected_htotal = 864,
297 .config0 = VEC_CONFIG0_PAL_BDGHI_STD,
298 .config1 = VEC_CONFIG1_C_CVBS_CVBS,
299 },
300 {
301 /* PAL-60 */
302 .mode = DRM_MODE_TV_MODE_PAL,
303 .expected_htotal = 858,
304 .config0 = VEC_CONFIG0_PAL_M_STD,
305 .config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
306 .custom_freq = 0x2a098acb,
307 },
308 {
309 .mode = DRM_MODE_TV_MODE_PAL_M,
310 .expected_htotal = 858,
311 .config0 = VEC_CONFIG0_PAL_M_STD,
312 .config1 = VEC_CONFIG1_C_CVBS_CVBS,
313 },
314 {
315 .mode = DRM_MODE_TV_MODE_PAL_N,
316 .expected_htotal = 864,
317 .config0 = VEC_CONFIG0_PAL_N_STD,
318 .config1 = VEC_CONFIG1_C_CVBS_CVBS,
319 },
320 {
321 .mode = DRM_MODE_TV_MODE_SECAM,
322 .expected_htotal = 864,
323 .config0 = VEC_CONFIG0_SECAM_STD,
324 .config1 = VEC_CONFIG1_C_CVBS_CVBS,
325 .custom_freq = 0x29c71c72,
326 },
327 };
328
329 static inline const struct vc4_vec_tv_mode *
vc4_vec_tv_mode_lookup(unsigned int mode,u16 htotal)330 vc4_vec_tv_mode_lookup(unsigned int mode, u16 htotal)
331 {
332 unsigned int i;
333
334 for (i = 0; i < ARRAY_SIZE(vc4_vec_tv_modes); i++) {
335 const struct vc4_vec_tv_mode *tv_mode = &vc4_vec_tv_modes[i];
336
337 if (tv_mode->mode == mode &&
338 tv_mode->expected_htotal == htotal)
339 return tv_mode;
340 }
341
342 return NULL;
343 }
344
345 static const struct drm_prop_enum_list legacy_tv_mode_names[] = {
346 { VC4_VEC_TV_MODE_NTSC, "NTSC", },
347 { VC4_VEC_TV_MODE_NTSC_443, "NTSC-443", },
348 { VC4_VEC_TV_MODE_NTSC_J, "NTSC-J", },
349 { VC4_VEC_TV_MODE_PAL, "PAL", },
350 { VC4_VEC_TV_MODE_PAL_60, "PAL-60", },
351 { VC4_VEC_TV_MODE_PAL_M, "PAL-M", },
352 { VC4_VEC_TV_MODE_PAL_N, "PAL-N", },
353 { VC4_VEC_TV_MODE_SECAM, "SECAM", },
354 };
355
356 static enum drm_connector_status
vc4_vec_connector_detect(struct drm_connector * connector,bool force)357 vc4_vec_connector_detect(struct drm_connector *connector, bool force)
358 {
359 return connector_status_unknown;
360 }
361
vc4_vec_connector_reset(struct drm_connector * connector)362 static void vc4_vec_connector_reset(struct drm_connector *connector)
363 {
364 drm_atomic_helper_connector_reset(connector);
365 drm_atomic_helper_connector_tv_reset(connector);
366 }
367
368 static int
vc4_vec_connector_set_property(struct drm_connector * connector,struct drm_connector_state * state,struct drm_property * property,uint64_t val)369 vc4_vec_connector_set_property(struct drm_connector *connector,
370 struct drm_connector_state *state,
371 struct drm_property *property,
372 uint64_t val)
373 {
374 struct vc4_vec *vec = connector_to_vc4_vec(connector);
375
376 if (property != vec->legacy_tv_mode_property)
377 return -EINVAL;
378
379 switch (val) {
380 case VC4_VEC_TV_MODE_NTSC:
381 state->tv.mode = DRM_MODE_TV_MODE_NTSC;
382 break;
383
384 case VC4_VEC_TV_MODE_NTSC_443:
385 state->tv.mode = DRM_MODE_TV_MODE_NTSC_443;
386 break;
387
388 case VC4_VEC_TV_MODE_NTSC_J:
389 state->tv.mode = DRM_MODE_TV_MODE_NTSC_J;
390 break;
391
392 case VC4_VEC_TV_MODE_PAL:
393 case VC4_VEC_TV_MODE_PAL_60:
394 state->tv.mode = DRM_MODE_TV_MODE_PAL;
395 break;
396
397 case VC4_VEC_TV_MODE_PAL_M:
398 state->tv.mode = DRM_MODE_TV_MODE_PAL_M;
399 break;
400
401 case VC4_VEC_TV_MODE_PAL_N:
402 state->tv.mode = DRM_MODE_TV_MODE_PAL_N;
403 break;
404
405 case VC4_VEC_TV_MODE_SECAM:
406 state->tv.mode = DRM_MODE_TV_MODE_SECAM;
407 break;
408
409 default:
410 return -EINVAL;
411 }
412
413 return 0;
414 }
415
416 static int
vc4_vec_connector_get_property(struct drm_connector * connector,const struct drm_connector_state * state,struct drm_property * property,uint64_t * val)417 vc4_vec_connector_get_property(struct drm_connector *connector,
418 const struct drm_connector_state *state,
419 struct drm_property *property,
420 uint64_t *val)
421 {
422 struct vc4_vec *vec = connector_to_vc4_vec(connector);
423
424 if (property != vec->legacy_tv_mode_property)
425 return -EINVAL;
426
427 switch (state->tv.mode) {
428 case DRM_MODE_TV_MODE_NTSC:
429 *val = VC4_VEC_TV_MODE_NTSC;
430 break;
431
432 case DRM_MODE_TV_MODE_NTSC_443:
433 *val = VC4_VEC_TV_MODE_NTSC_443;
434 break;
435
436 case DRM_MODE_TV_MODE_NTSC_J:
437 *val = VC4_VEC_TV_MODE_NTSC_J;
438 break;
439
440 case DRM_MODE_TV_MODE_PAL:
441 *val = VC4_VEC_TV_MODE_PAL;
442 break;
443
444 case DRM_MODE_TV_MODE_PAL_M:
445 *val = VC4_VEC_TV_MODE_PAL_M;
446 break;
447
448 case DRM_MODE_TV_MODE_PAL_N:
449 *val = VC4_VEC_TV_MODE_PAL_N;
450 break;
451
452 case DRM_MODE_TV_MODE_SECAM:
453 *val = VC4_VEC_TV_MODE_SECAM;
454 break;
455
456 default:
457 return -EINVAL;
458 }
459
460 return 0;
461 }
462
463 static const struct drm_connector_funcs vc4_vec_connector_funcs = {
464 .detect = vc4_vec_connector_detect,
465 .fill_modes = drm_helper_probe_single_connector_modes,
466 .reset = vc4_vec_connector_reset,
467 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
468 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
469 .atomic_get_property = vc4_vec_connector_get_property,
470 .atomic_set_property = vc4_vec_connector_set_property,
471 };
472
473 static const struct drm_connector_helper_funcs vc4_vec_connector_helper_funcs = {
474 .atomic_check = drm_atomic_helper_connector_tv_check,
475 .get_modes = drm_connector_helper_tv_get_modes,
476 };
477
vc4_vec_connector_init(struct drm_device * dev,struct vc4_vec * vec)478 static int vc4_vec_connector_init(struct drm_device *dev, struct vc4_vec *vec)
479 {
480 struct drm_connector *connector = &vec->connector;
481 struct drm_property *prop;
482 int ret;
483
484 connector->interlace_allowed = true;
485
486 ret = drmm_connector_init(dev, connector, &vc4_vec_connector_funcs,
487 DRM_MODE_CONNECTOR_Composite, NULL);
488 if (ret)
489 return ret;
490
491 drm_connector_helper_add(connector, &vc4_vec_connector_helper_funcs);
492
493 drm_object_attach_property(&connector->base,
494 dev->mode_config.tv_mode_property,
495 DRM_MODE_TV_MODE_NTSC);
496
497 prop = drm_property_create_enum(dev, 0, "mode",
498 legacy_tv_mode_names,
499 ARRAY_SIZE(legacy_tv_mode_names));
500 if (!prop)
501 return -ENOMEM;
502 vec->legacy_tv_mode_property = prop;
503
504 drm_object_attach_property(&connector->base, prop, VC4_VEC_TV_MODE_NTSC);
505
506 drm_connector_attach_encoder(connector, &vec->encoder.base);
507
508 return 0;
509 }
510
vc4_vec_encoder_disable(struct drm_encoder * encoder,struct drm_atomic_state * state)511 static void vc4_vec_encoder_disable(struct drm_encoder *encoder,
512 struct drm_atomic_state *state)
513 {
514 struct drm_device *drm = encoder->dev;
515 struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
516 int idx, ret;
517
518 if (!drm_dev_enter(drm, &idx))
519 return;
520
521 VEC_WRITE(VEC_CFG, 0);
522 VEC_WRITE(VEC_DAC_MISC,
523 VEC_DAC_MISC_VCD_PWRDN |
524 VEC_DAC_MISC_BIAS_PWRDN |
525 VEC_DAC_MISC_DAC_PWRDN |
526 VEC_DAC_MISC_LDO_PWRDN);
527
528 clk_disable_unprepare(vec->clock);
529
530 ret = pm_runtime_put(&vec->pdev->dev);
531 if (ret < 0) {
532 DRM_ERROR("Failed to release power domain: %d\n", ret);
533 goto err_dev_exit;
534 }
535
536 drm_dev_exit(idx);
537 return;
538
539 err_dev_exit:
540 drm_dev_exit(idx);
541 }
542
vc4_vec_encoder_enable(struct drm_encoder * encoder,struct drm_atomic_state * state)543 static void vc4_vec_encoder_enable(struct drm_encoder *encoder,
544 struct drm_atomic_state *state)
545 {
546 struct drm_device *drm = encoder->dev;
547 struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
548 struct drm_connector *connector = &vec->connector;
549 struct drm_connector_state *conn_state =
550 drm_atomic_get_new_connector_state(state, connector);
551 struct drm_display_mode *adjusted_mode =
552 &encoder->crtc->state->adjusted_mode;
553 const struct vc4_vec_tv_mode *tv_mode;
554 int idx, ret;
555
556 if (!drm_dev_enter(drm, &idx))
557 return;
558
559 tv_mode = vc4_vec_tv_mode_lookup(conn_state->tv.mode,
560 adjusted_mode->htotal);
561 if (!tv_mode)
562 goto err_dev_exit;
563
564 ret = pm_runtime_resume_and_get(&vec->pdev->dev);
565 if (ret < 0) {
566 DRM_ERROR("Failed to retain power domain: %d\n", ret);
567 goto err_dev_exit;
568 }
569
570 /*
571 * We need to set the clock rate each time we enable the encoder
572 * because there's a chance we share the same parent with the HDMI
573 * clock, and both drivers are requesting different rates.
574 * The good news is, these 2 encoders cannot be enabled at the same
575 * time, thus preventing incompatible rate requests.
576 */
577 ret = clk_set_rate(vec->clock, 108000000);
578 if (ret) {
579 DRM_ERROR("Failed to set clock rate: %d\n", ret);
580 goto err_put_runtime_pm;
581 }
582
583 ret = clk_prepare_enable(vec->clock);
584 if (ret) {
585 DRM_ERROR("Failed to turn on core clock: %d\n", ret);
586 goto err_put_runtime_pm;
587 }
588
589 /* Reset the different blocks */
590 VEC_WRITE(VEC_WSE_RESET, 1);
591 VEC_WRITE(VEC_SOFT_RESET, 1);
592
593 /* Disable the CGSM-A and WSE blocks */
594 VEC_WRITE(VEC_WSE_CONTROL, 0);
595
596 /* Write config common to all modes. */
597
598 /*
599 * Color subcarrier phase: phase = 360 * SCHPH / 256.
600 * 0x28 <=> 39.375 deg.
601 */
602 VEC_WRITE(VEC_SCHPH, 0x28);
603
604 /*
605 * Reset to default values.
606 */
607 VEC_WRITE(VEC_CLMP0_START, 0xac);
608 VEC_WRITE(VEC_CLMP0_END, 0xec);
609 VEC_WRITE(VEC_CONFIG2,
610 VEC_CONFIG2_UV_DIG_DIS |
611 VEC_CONFIG2_RGB_DIG_DIS |
612 ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ? 0 : VEC_CONFIG2_PROG_SCAN));
613 VEC_WRITE(VEC_CONFIG3, VEC_CONFIG3_HORIZ_LEN_STD);
614 VEC_WRITE(VEC_DAC_CONFIG, vec->variant->dac_config);
615
616 /* Mask all interrupts. */
617 VEC_WRITE(VEC_MASK0, 0);
618
619 VEC_WRITE(VEC_CONFIG0, tv_mode->config0);
620 VEC_WRITE(VEC_CONFIG1, tv_mode->config1);
621
622 if (tv_mode->custom_freq) {
623 VEC_WRITE(VEC_FREQ3_2,
624 (tv_mode->custom_freq >> 16) & 0xffff);
625 VEC_WRITE(VEC_FREQ1_0,
626 tv_mode->custom_freq & 0xffff);
627 }
628
629 VEC_WRITE(VEC_DAC_MISC,
630 VEC_DAC_MISC_VID_ACT | VEC_DAC_MISC_DAC_RST_N);
631 VEC_WRITE(VEC_CFG, VEC_CFG_VEC_EN);
632
633 drm_dev_exit(idx);
634 return;
635
636 err_put_runtime_pm:
637 pm_runtime_put(&vec->pdev->dev);
638 err_dev_exit:
639 drm_dev_exit(idx);
640 }
641
vc4_vec_encoder_atomic_check(struct drm_encoder * encoder,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)642 static int vc4_vec_encoder_atomic_check(struct drm_encoder *encoder,
643 struct drm_crtc_state *crtc_state,
644 struct drm_connector_state *conn_state)
645 {
646 const struct drm_display_mode *mode = &crtc_state->adjusted_mode;
647 const struct vc4_vec_tv_mode *tv_mode;
648
649 tv_mode = vc4_vec_tv_mode_lookup(conn_state->tv.mode, mode->htotal);
650 if (!tv_mode)
651 return -EINVAL;
652
653 if (mode->crtc_hdisplay % 4)
654 return -EINVAL;
655
656 if (!(mode->crtc_hsync_end - mode->crtc_hsync_start))
657 return -EINVAL;
658
659 switch (mode->htotal) {
660 /* NTSC */
661 case 858:
662 if (mode->crtc_vtotal > 262)
663 return -EINVAL;
664
665 if (mode->crtc_vdisplay < 1 || mode->crtc_vdisplay > 253)
666 return -EINVAL;
667
668 if (!(mode->crtc_vsync_start - mode->crtc_vdisplay))
669 return -EINVAL;
670
671 if ((mode->crtc_vsync_end - mode->crtc_vsync_start) != 3)
672 return -EINVAL;
673
674 if ((mode->crtc_vtotal - mode->crtc_vsync_end) < 4)
675 return -EINVAL;
676
677 break;
678
679 /* PAL/SECAM */
680 case 864:
681 if (mode->crtc_vtotal > 312)
682 return -EINVAL;
683
684 if (mode->crtc_vdisplay < 1 || mode->crtc_vdisplay > 305)
685 return -EINVAL;
686
687 if (!(mode->crtc_vsync_start - mode->crtc_vdisplay))
688 return -EINVAL;
689
690 if ((mode->crtc_vsync_end - mode->crtc_vsync_start) != 3)
691 return -EINVAL;
692
693 if ((mode->crtc_vtotal - mode->crtc_vsync_end) < 2)
694 return -EINVAL;
695
696 break;
697
698 default:
699 return -EINVAL;
700 }
701
702 return 0;
703 }
704
705 static const struct drm_encoder_helper_funcs vc4_vec_encoder_helper_funcs = {
706 .atomic_check = vc4_vec_encoder_atomic_check,
707 .atomic_disable = vc4_vec_encoder_disable,
708 .atomic_enable = vc4_vec_encoder_enable,
709 };
710
vc4_vec_late_register(struct drm_encoder * encoder)711 static int vc4_vec_late_register(struct drm_encoder *encoder)
712 {
713 struct drm_device *drm = encoder->dev;
714 struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
715
716 vc4_debugfs_add_regset32(drm, "vec_regs", &vec->regset);
717
718 return 0;
719 }
720
721 static const struct drm_encoder_funcs vc4_vec_encoder_funcs = {
722 .late_register = vc4_vec_late_register,
723 };
724
725 static const struct vc4_vec_variant bcm2835_vec_variant = {
726 .dac_config = VEC_DAC_CONFIG_DAC_CTRL(0xc) |
727 VEC_DAC_CONFIG_DRIVER_CTRL(0xc) |
728 VEC_DAC_CONFIG_LDO_BIAS_CTRL(0x46)
729 };
730
731 static const struct vc4_vec_variant bcm2711_vec_variant = {
732 .dac_config = VEC_DAC_CONFIG_DAC_CTRL(0x0) |
733 VEC_DAC_CONFIG_DRIVER_CTRL(0x80) |
734 VEC_DAC_CONFIG_LDO_BIAS_CTRL(0x61)
735 };
736
737 static const struct of_device_id vc4_vec_dt_match[] = {
738 { .compatible = "brcm,bcm2835-vec", .data = &bcm2835_vec_variant },
739 { .compatible = "brcm,bcm2711-vec", .data = &bcm2711_vec_variant },
740 { /* sentinel */ },
741 };
742
vc4_vec_bind(struct device * dev,struct device * master,void * data)743 static int vc4_vec_bind(struct device *dev, struct device *master, void *data)
744 {
745 struct platform_device *pdev = to_platform_device(dev);
746 struct drm_device *drm = dev_get_drvdata(master);
747 struct vc4_vec *vec;
748 int ret;
749
750 ret = drm_mode_create_tv_properties(drm,
751 BIT(DRM_MODE_TV_MODE_NTSC) |
752 BIT(DRM_MODE_TV_MODE_NTSC_443) |
753 BIT(DRM_MODE_TV_MODE_NTSC_J) |
754 BIT(DRM_MODE_TV_MODE_PAL) |
755 BIT(DRM_MODE_TV_MODE_PAL_M) |
756 BIT(DRM_MODE_TV_MODE_PAL_N) |
757 BIT(DRM_MODE_TV_MODE_SECAM));
758 if (ret)
759 return ret;
760
761 vec = drmm_kzalloc(drm, sizeof(*vec), GFP_KERNEL);
762 if (!vec)
763 return -ENOMEM;
764
765 vec->encoder.type = VC4_ENCODER_TYPE_VEC;
766 vec->pdev = pdev;
767 vec->variant = (const struct vc4_vec_variant *)
768 of_device_get_match_data(dev);
769 vec->regs = vc4_ioremap_regs(pdev, 0);
770 if (IS_ERR(vec->regs))
771 return PTR_ERR(vec->regs);
772 vec->regset.base = vec->regs;
773 vec->regset.regs = vec_regs;
774 vec->regset.nregs = ARRAY_SIZE(vec_regs);
775
776 vec->clock = devm_clk_get(dev, NULL);
777 if (IS_ERR(vec->clock)) {
778 ret = PTR_ERR(vec->clock);
779 if (ret != -EPROBE_DEFER)
780 DRM_ERROR("Failed to get clock: %d\n", ret);
781 return ret;
782 }
783
784 ret = devm_pm_runtime_enable(dev);
785 if (ret)
786 return ret;
787
788 ret = drmm_encoder_init(drm, &vec->encoder.base,
789 &vc4_vec_encoder_funcs,
790 DRM_MODE_ENCODER_TVDAC,
791 NULL);
792 if (ret)
793 return ret;
794
795 drm_encoder_helper_add(&vec->encoder.base, &vc4_vec_encoder_helper_funcs);
796
797 ret = vc4_vec_connector_init(drm, vec);
798 if (ret)
799 return ret;
800
801 dev_set_drvdata(dev, vec);
802
803 return 0;
804 }
805
806 static const struct component_ops vc4_vec_ops = {
807 .bind = vc4_vec_bind,
808 };
809
vc4_vec_dev_probe(struct platform_device * pdev)810 static int vc4_vec_dev_probe(struct platform_device *pdev)
811 {
812 return component_add(&pdev->dev, &vc4_vec_ops);
813 }
814
vc4_vec_dev_remove(struct platform_device * pdev)815 static void vc4_vec_dev_remove(struct platform_device *pdev)
816 {
817 component_del(&pdev->dev, &vc4_vec_ops);
818 }
819
820 struct platform_driver vc4_vec_driver = {
821 .probe = vc4_vec_dev_probe,
822 .remove_new = vc4_vec_dev_remove,
823 .driver = {
824 .name = "vc4_vec",
825 .of_match_table = vc4_vec_dt_match,
826 },
827 };
828