1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Driver for Analog Devices ADV748X HDMI receiver and Component Processor (CP)
4 *
5 * Copyright (C) 2017 Renesas Electronics Corp.
6 */
7
8 #include <linux/module.h>
9 #include <linux/mutex.h>
10
11 #include <media/v4l2-ctrls.h>
12 #include <media/v4l2-device.h>
13 #include <media/v4l2-dv-timings.h>
14 #include <media/v4l2-ioctl.h>
15
16 #include <uapi/linux/v4l2-dv-timings.h>
17
18 #include "adv748x.h"
19
20 /* -----------------------------------------------------------------------------
21 * HDMI and CP
22 */
23
24 #define ADV748X_HDMI_MIN_WIDTH 640
25 #define ADV748X_HDMI_MAX_WIDTH 1920
26 #define ADV748X_HDMI_MIN_HEIGHT 480
27 #define ADV748X_HDMI_MAX_HEIGHT 1200
28
29 /* V4L2_DV_BT_CEA_720X480I59_94 - 0.5 MHz */
30 #define ADV748X_HDMI_MIN_PIXELCLOCK 13000000
31 /* V4L2_DV_BT_DMT_1600X1200P60 */
32 #define ADV748X_HDMI_MAX_PIXELCLOCK 162000000
33
34 static const struct v4l2_dv_timings_cap adv748x_hdmi_timings_cap = {
35 .type = V4L2_DV_BT_656_1120,
36 /* keep this initialization for compatibility with GCC < 4.4.6 */
37 .reserved = { 0 },
38
39 V4L2_INIT_BT_TIMINGS(ADV748X_HDMI_MIN_WIDTH, ADV748X_HDMI_MAX_WIDTH,
40 ADV748X_HDMI_MIN_HEIGHT, ADV748X_HDMI_MAX_HEIGHT,
41 ADV748X_HDMI_MIN_PIXELCLOCK,
42 ADV748X_HDMI_MAX_PIXELCLOCK,
43 V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT,
44 V4L2_DV_BT_CAP_PROGRESSIVE)
45 };
46
47 struct adv748x_hdmi_video_standards {
48 struct v4l2_dv_timings timings;
49 u8 vid_std;
50 u8 v_freq;
51 };
52
53 static const struct adv748x_hdmi_video_standards
54 adv748x_hdmi_video_standards[] = {
55 { V4L2_DV_BT_CEA_720X480P59_94, 0x4a, 0x00 },
56 { V4L2_DV_BT_CEA_720X576P50, 0x4b, 0x00 },
57 { V4L2_DV_BT_CEA_1280X720P60, 0x53, 0x00 },
58 { V4L2_DV_BT_CEA_1280X720P50, 0x53, 0x01 },
59 { V4L2_DV_BT_CEA_1280X720P30, 0x53, 0x02 },
60 { V4L2_DV_BT_CEA_1280X720P25, 0x53, 0x03 },
61 { V4L2_DV_BT_CEA_1280X720P24, 0x53, 0x04 },
62 { V4L2_DV_BT_CEA_1920X1080P60, 0x5e, 0x00 },
63 { V4L2_DV_BT_CEA_1920X1080P50, 0x5e, 0x01 },
64 { V4L2_DV_BT_CEA_1920X1080P30, 0x5e, 0x02 },
65 { V4L2_DV_BT_CEA_1920X1080P25, 0x5e, 0x03 },
66 { V4L2_DV_BT_CEA_1920X1080P24, 0x5e, 0x04 },
67 /* SVGA */
68 { V4L2_DV_BT_DMT_800X600P56, 0x80, 0x00 },
69 { V4L2_DV_BT_DMT_800X600P60, 0x81, 0x00 },
70 { V4L2_DV_BT_DMT_800X600P72, 0x82, 0x00 },
71 { V4L2_DV_BT_DMT_800X600P75, 0x83, 0x00 },
72 { V4L2_DV_BT_DMT_800X600P85, 0x84, 0x00 },
73 /* SXGA */
74 { V4L2_DV_BT_DMT_1280X1024P60, 0x85, 0x00 },
75 { V4L2_DV_BT_DMT_1280X1024P75, 0x86, 0x00 },
76 /* VGA */
77 { V4L2_DV_BT_DMT_640X480P60, 0x88, 0x00 },
78 { V4L2_DV_BT_DMT_640X480P72, 0x89, 0x00 },
79 { V4L2_DV_BT_DMT_640X480P75, 0x8a, 0x00 },
80 { V4L2_DV_BT_DMT_640X480P85, 0x8b, 0x00 },
81 /* XGA */
82 { V4L2_DV_BT_DMT_1024X768P60, 0x8c, 0x00 },
83 { V4L2_DV_BT_DMT_1024X768P70, 0x8d, 0x00 },
84 { V4L2_DV_BT_DMT_1024X768P75, 0x8e, 0x00 },
85 { V4L2_DV_BT_DMT_1024X768P85, 0x8f, 0x00 },
86 /* UXGA */
87 { V4L2_DV_BT_DMT_1600X1200P60, 0x96, 0x00 },
88 };
89
adv748x_hdmi_fill_format(struct adv748x_hdmi * hdmi,struct v4l2_mbus_framefmt * fmt)90 static void adv748x_hdmi_fill_format(struct adv748x_hdmi *hdmi,
91 struct v4l2_mbus_framefmt *fmt)
92 {
93 memset(fmt, 0, sizeof(*fmt));
94
95 fmt->code = MEDIA_BUS_FMT_RGB888_1X24;
96 fmt->field = hdmi->timings.bt.interlaced ?
97 V4L2_FIELD_ALTERNATE : V4L2_FIELD_NONE;
98
99 /* TODO: The colorspace depends on the AVI InfoFrame contents */
100 fmt->colorspace = V4L2_COLORSPACE_SRGB;
101
102 fmt->width = hdmi->timings.bt.width;
103 fmt->height = hdmi->timings.bt.height;
104
105 if (fmt->field == V4L2_FIELD_ALTERNATE)
106 fmt->height /= 2;
107 }
108
adv748x_fill_optional_dv_timings(struct v4l2_dv_timings * timings)109 static void adv748x_fill_optional_dv_timings(struct v4l2_dv_timings *timings)
110 {
111 v4l2_find_dv_timings_cap(timings, &adv748x_hdmi_timings_cap,
112 250000, NULL, NULL);
113 }
114
adv748x_hdmi_has_signal(struct adv748x_state * state)115 static bool adv748x_hdmi_has_signal(struct adv748x_state *state)
116 {
117 int val;
118
119 /* Check that VERT_FILTER and DE_REGEN is locked */
120 val = hdmi_read(state, ADV748X_HDMI_LW1);
121 return (val & ADV748X_HDMI_LW1_VERT_FILTER) &&
122 (val & ADV748X_HDMI_LW1_DE_REGEN);
123 }
124
adv748x_hdmi_read_pixelclock(struct adv748x_state * state)125 static int adv748x_hdmi_read_pixelclock(struct adv748x_state *state)
126 {
127 int a, b;
128
129 a = hdmi_read(state, ADV748X_HDMI_TMDS_1);
130 b = hdmi_read(state, ADV748X_HDMI_TMDS_2);
131 if (a < 0 || b < 0)
132 return -ENODATA;
133
134 /*
135 * The high 9 bits store TMDS frequency measurement in MHz
136 * The low 7 bits of TMDS_2 store the 7-bit TMDS fractional frequency
137 * measurement in 1/128 MHz
138 */
139 return ((a << 1) | (b >> 7)) * 1000000 + (b & 0x7f) * 1000000 / 128;
140 }
141
142 /*
143 * adv748x_hdmi_set_de_timings: Adjust horizontal picture offset through DE
144 *
145 * HDMI CP uses a Data Enable synchronisation timing reference
146 *
147 * Vary the leading and trailing edge position of the DE signal output by the CP
148 * core. Values are stored as signed-twos-complement in one-pixel-clock units
149 *
150 * The start and end are shifted equally by the 10-bit shift value.
151 */
adv748x_hdmi_set_de_timings(struct adv748x_state * state,int shift)152 static void adv748x_hdmi_set_de_timings(struct adv748x_state *state, int shift)
153 {
154 u8 high, low;
155
156 /* POS_HIGH stores bits 8 and 9 of both the start and end */
157 high = ADV748X_CP_DE_POS_HIGH_SET;
158 high |= (shift & 0x300) >> 8;
159 low = shift & 0xff;
160
161 /* The sequence of the writes is important and must be followed */
162 cp_write(state, ADV748X_CP_DE_POS_HIGH, high);
163 cp_write(state, ADV748X_CP_DE_POS_END_LOW, low);
164
165 high |= (shift & 0x300) >> 6;
166
167 cp_write(state, ADV748X_CP_DE_POS_HIGH, high);
168 cp_write(state, ADV748X_CP_DE_POS_START_LOW, low);
169 }
170
adv748x_hdmi_set_video_timings(struct adv748x_state * state,const struct v4l2_dv_timings * timings)171 static int adv748x_hdmi_set_video_timings(struct adv748x_state *state,
172 const struct v4l2_dv_timings *timings)
173 {
174 const struct adv748x_hdmi_video_standards *stds =
175 adv748x_hdmi_video_standards;
176 unsigned int i;
177
178 for (i = 0; i < ARRAY_SIZE(adv748x_hdmi_video_standards); i++) {
179 if (v4l2_match_dv_timings(timings, &stds[i].timings, 250000,
180 false))
181 break;
182 }
183
184 if (i >= ARRAY_SIZE(adv748x_hdmi_video_standards))
185 return -EINVAL;
186
187 /*
188 * When setting cp_vid_std to either 720p, 1080i, or 1080p, the video
189 * will get shifted horizontally to the left in active video mode.
190 * The de_h_start and de_h_end controls are used to centre the picture
191 * correctly
192 */
193 switch (stds[i].vid_std) {
194 case 0x53: /* 720p */
195 adv748x_hdmi_set_de_timings(state, -40);
196 break;
197 case 0x54: /* 1080i */
198 case 0x5e: /* 1080p */
199 adv748x_hdmi_set_de_timings(state, -44);
200 break;
201 default:
202 adv748x_hdmi_set_de_timings(state, 0);
203 break;
204 }
205
206 io_write(state, ADV748X_IO_VID_STD, stds[i].vid_std);
207 io_clrset(state, ADV748X_IO_DATAPATH, ADV748X_IO_DATAPATH_VFREQ_M,
208 stds[i].v_freq << ADV748X_IO_DATAPATH_VFREQ_SHIFT);
209
210 return 0;
211 }
212
213 /* -----------------------------------------------------------------------------
214 * v4l2_subdev_video_ops
215 */
216
adv748x_hdmi_s_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)217 static int adv748x_hdmi_s_dv_timings(struct v4l2_subdev *sd,
218 struct v4l2_dv_timings *timings)
219 {
220 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
221 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
222 int ret;
223
224 if (!timings)
225 return -EINVAL;
226
227 if (v4l2_match_dv_timings(&hdmi->timings, timings, 0, false))
228 return 0;
229
230 if (!v4l2_valid_dv_timings(timings, &adv748x_hdmi_timings_cap,
231 NULL, NULL))
232 return -ERANGE;
233
234 adv748x_fill_optional_dv_timings(timings);
235
236 mutex_lock(&state->mutex);
237
238 ret = adv748x_hdmi_set_video_timings(state, timings);
239 if (ret)
240 goto error;
241
242 hdmi->timings = *timings;
243
244 cp_clrset(state, ADV748X_CP_VID_ADJ_2, ADV748X_CP_VID_ADJ_2_INTERLACED,
245 timings->bt.interlaced ?
246 ADV748X_CP_VID_ADJ_2_INTERLACED : 0);
247
248 mutex_unlock(&state->mutex);
249
250 return 0;
251
252 error:
253 mutex_unlock(&state->mutex);
254 return ret;
255 }
256
adv748x_hdmi_g_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)257 static int adv748x_hdmi_g_dv_timings(struct v4l2_subdev *sd,
258 struct v4l2_dv_timings *timings)
259 {
260 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
261 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
262
263 mutex_lock(&state->mutex);
264
265 *timings = hdmi->timings;
266
267 mutex_unlock(&state->mutex);
268
269 return 0;
270 }
271
adv748x_hdmi_query_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)272 static int adv748x_hdmi_query_dv_timings(struct v4l2_subdev *sd,
273 struct v4l2_dv_timings *timings)
274 {
275 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
276 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
277 struct v4l2_bt_timings *bt = &timings->bt;
278 int pixelclock;
279 int polarity;
280
281 if (!timings)
282 return -EINVAL;
283
284 memset(timings, 0, sizeof(struct v4l2_dv_timings));
285
286 /*
287 * If the pattern generator is enabled the device shall not be queried
288 * for timings. Instead the timings programmed shall be reported as they
289 * are the ones being used to generate the pattern.
290 */
291 if (cp_read(state, ADV748X_CP_PAT_GEN) & ADV748X_CP_PAT_GEN_EN) {
292 *timings = hdmi->timings;
293 return 0;
294 }
295
296 if (!adv748x_hdmi_has_signal(state))
297 return -ENOLINK;
298
299 pixelclock = adv748x_hdmi_read_pixelclock(state);
300 if (pixelclock < 0)
301 return -ENODATA;
302
303 timings->type = V4L2_DV_BT_656_1120;
304
305 bt->pixelclock = pixelclock;
306 bt->interlaced = hdmi_read(state, ADV748X_HDMI_F1H1) &
307 ADV748X_HDMI_F1H1_INTERLACED ?
308 V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
309 bt->width = hdmi_read16(state, ADV748X_HDMI_LW1,
310 ADV748X_HDMI_LW1_WIDTH_MASK);
311 bt->height = hdmi_read16(state, ADV748X_HDMI_F0H1,
312 ADV748X_HDMI_F0H1_HEIGHT_MASK);
313 bt->hfrontporch = hdmi_read16(state, ADV748X_HDMI_HFRONT_PORCH,
314 ADV748X_HDMI_HFRONT_PORCH_MASK);
315 bt->hsync = hdmi_read16(state, ADV748X_HDMI_HSYNC_WIDTH,
316 ADV748X_HDMI_HSYNC_WIDTH_MASK);
317 bt->hbackporch = hdmi_read16(state, ADV748X_HDMI_HBACK_PORCH,
318 ADV748X_HDMI_HBACK_PORCH_MASK);
319 bt->vfrontporch = hdmi_read16(state, ADV748X_HDMI_VFRONT_PORCH,
320 ADV748X_HDMI_VFRONT_PORCH_MASK) / 2;
321 bt->vsync = hdmi_read16(state, ADV748X_HDMI_VSYNC_WIDTH,
322 ADV748X_HDMI_VSYNC_WIDTH_MASK) / 2;
323 bt->vbackporch = hdmi_read16(state, ADV748X_HDMI_VBACK_PORCH,
324 ADV748X_HDMI_VBACK_PORCH_MASK) / 2;
325
326 polarity = hdmi_read(state, 0x05);
327 bt->polarities = (polarity & BIT(4) ? V4L2_DV_VSYNC_POS_POL : 0) |
328 (polarity & BIT(5) ? V4L2_DV_HSYNC_POS_POL : 0);
329
330 if (bt->interlaced == V4L2_DV_INTERLACED) {
331 bt->height += hdmi_read16(state, 0x0b, 0x1fff);
332 bt->il_vfrontporch = hdmi_read16(state, 0x2c, 0x3fff) / 2;
333 bt->il_vsync = hdmi_read16(state, 0x30, 0x3fff) / 2;
334 bt->il_vbackporch = hdmi_read16(state, 0x34, 0x3fff) / 2;
335 }
336
337 adv748x_fill_optional_dv_timings(timings);
338
339 /*
340 * No interrupt handling is implemented yet.
341 * There should be an IRQ when a cable is plugged and the new timings
342 * should be figured out and stored to state.
343 */
344 hdmi->timings = *timings;
345
346 return 0;
347 }
348
adv748x_hdmi_g_input_status(struct v4l2_subdev * sd,u32 * status)349 static int adv748x_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
350 {
351 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
352 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
353
354 mutex_lock(&state->mutex);
355
356 *status = adv748x_hdmi_has_signal(state) ? 0 : V4L2_IN_ST_NO_SIGNAL;
357
358 mutex_unlock(&state->mutex);
359
360 return 0;
361 }
362
adv748x_hdmi_s_stream(struct v4l2_subdev * sd,int enable)363 static int adv748x_hdmi_s_stream(struct v4l2_subdev *sd, int enable)
364 {
365 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
366 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
367 int ret;
368
369 mutex_lock(&state->mutex);
370
371 ret = adv748x_tx_power(hdmi->tx, enable);
372 if (ret)
373 goto done;
374
375 if (adv748x_hdmi_has_signal(state))
376 adv_dbg(state, "Detected HDMI signal\n");
377 else
378 adv_dbg(state, "Couldn't detect HDMI video signal\n");
379
380 done:
381 mutex_unlock(&state->mutex);
382 return ret;
383 }
384
adv748x_hdmi_g_pixelaspect(struct v4l2_subdev * sd,struct v4l2_fract * aspect)385 static int adv748x_hdmi_g_pixelaspect(struct v4l2_subdev *sd,
386 struct v4l2_fract *aspect)
387 {
388 aspect->numerator = 1;
389 aspect->denominator = 1;
390
391 return 0;
392 }
393
394 static const struct v4l2_subdev_video_ops adv748x_video_ops_hdmi = {
395 .s_dv_timings = adv748x_hdmi_s_dv_timings,
396 .g_dv_timings = adv748x_hdmi_g_dv_timings,
397 .query_dv_timings = adv748x_hdmi_query_dv_timings,
398 .g_input_status = adv748x_hdmi_g_input_status,
399 .s_stream = adv748x_hdmi_s_stream,
400 .g_pixelaspect = adv748x_hdmi_g_pixelaspect,
401 };
402
403 /* -----------------------------------------------------------------------------
404 * v4l2_subdev_pad_ops
405 */
406
adv748x_hdmi_propagate_pixelrate(struct adv748x_hdmi * hdmi)407 static int adv748x_hdmi_propagate_pixelrate(struct adv748x_hdmi *hdmi)
408 {
409 struct v4l2_subdev *tx;
410 struct v4l2_dv_timings timings;
411
412 tx = adv748x_get_remote_sd(&hdmi->pads[ADV748X_HDMI_SOURCE]);
413 if (!tx)
414 return -ENOLINK;
415
416 adv748x_hdmi_query_dv_timings(&hdmi->sd, &timings);
417
418 return adv748x_csi2_set_pixelrate(tx, timings.bt.pixelclock);
419 }
420
adv748x_hdmi_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)421 static int adv748x_hdmi_enum_mbus_code(struct v4l2_subdev *sd,
422 struct v4l2_subdev_state *sd_state,
423 struct v4l2_subdev_mbus_code_enum *code)
424 {
425 if (code->index != 0)
426 return -EINVAL;
427
428 code->code = MEDIA_BUS_FMT_RGB888_1X24;
429
430 return 0;
431 }
432
adv748x_hdmi_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)433 static int adv748x_hdmi_get_format(struct v4l2_subdev *sd,
434 struct v4l2_subdev_state *sd_state,
435 struct v4l2_subdev_format *sdformat)
436 {
437 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
438 struct v4l2_mbus_framefmt *mbusformat;
439
440 if (sdformat->pad != ADV748X_HDMI_SOURCE)
441 return -EINVAL;
442
443 if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) {
444 mbusformat = v4l2_subdev_get_try_format(sd, sd_state,
445 sdformat->pad);
446 sdformat->format = *mbusformat;
447 } else {
448 adv748x_hdmi_fill_format(hdmi, &sdformat->format);
449 adv748x_hdmi_propagate_pixelrate(hdmi);
450 }
451
452 return 0;
453 }
454
adv748x_hdmi_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)455 static int adv748x_hdmi_set_format(struct v4l2_subdev *sd,
456 struct v4l2_subdev_state *sd_state,
457 struct v4l2_subdev_format *sdformat)
458 {
459 struct v4l2_mbus_framefmt *mbusformat;
460
461 if (sdformat->pad != ADV748X_HDMI_SOURCE)
462 return -EINVAL;
463
464 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
465 return adv748x_hdmi_get_format(sd, sd_state, sdformat);
466
467 mbusformat = v4l2_subdev_get_try_format(sd, sd_state, sdformat->pad);
468 *mbusformat = sdformat->format;
469
470 return 0;
471 }
472
adv748x_hdmi_get_edid(struct v4l2_subdev * sd,struct v4l2_edid * edid)473 static int adv748x_hdmi_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
474 {
475 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
476
477 memset(edid->reserved, 0, sizeof(edid->reserved));
478
479 if (!hdmi->edid.present)
480 return -ENODATA;
481
482 if (edid->start_block == 0 && edid->blocks == 0) {
483 edid->blocks = hdmi->edid.blocks;
484 return 0;
485 }
486
487 if (edid->start_block >= hdmi->edid.blocks)
488 return -EINVAL;
489
490 if (edid->start_block + edid->blocks > hdmi->edid.blocks)
491 edid->blocks = hdmi->edid.blocks - edid->start_block;
492
493 memcpy(edid->edid, hdmi->edid.edid + edid->start_block * 128,
494 edid->blocks * 128);
495
496 return 0;
497 }
498
adv748x_hdmi_edid_write_block(struct adv748x_hdmi * hdmi,unsigned int total_len,const u8 * val)499 static inline int adv748x_hdmi_edid_write_block(struct adv748x_hdmi *hdmi,
500 unsigned int total_len, const u8 *val)
501 {
502 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
503 int err = 0;
504 int i = 0;
505 int len = 0;
506
507 adv_dbg(state, "%s: write EDID block (%d byte)\n",
508 __func__, total_len);
509
510 while (!err && i < total_len) {
511 len = (total_len - i) > I2C_SMBUS_BLOCK_MAX ?
512 I2C_SMBUS_BLOCK_MAX :
513 (total_len - i);
514
515 err = adv748x_write_block(state, ADV748X_PAGE_EDID,
516 i, val + i, len);
517 i += len;
518 }
519
520 return err;
521 }
522
adv748x_hdmi_set_edid(struct v4l2_subdev * sd,struct v4l2_edid * edid)523 static int adv748x_hdmi_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
524 {
525 struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
526 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
527 int err;
528
529 memset(edid->reserved, 0, sizeof(edid->reserved));
530
531 if (edid->start_block != 0)
532 return -EINVAL;
533
534 if (edid->blocks == 0) {
535 hdmi->edid.blocks = 0;
536 hdmi->edid.present = 0;
537
538 /* Fall back to a 16:9 aspect ratio */
539 hdmi->aspect_ratio.numerator = 16;
540 hdmi->aspect_ratio.denominator = 9;
541
542 /* Disable the EDID */
543 repeater_write(state, ADV748X_REPEATER_EDID_SZ,
544 edid->blocks << ADV748X_REPEATER_EDID_SZ_SHIFT);
545
546 repeater_write(state, ADV748X_REPEATER_EDID_CTL, 0);
547
548 return 0;
549 }
550
551 if (edid->blocks > 4) {
552 edid->blocks = 4;
553 return -E2BIG;
554 }
555
556 memcpy(hdmi->edid.edid, edid->edid, 128 * edid->blocks);
557 hdmi->edid.blocks = edid->blocks;
558 hdmi->edid.present = true;
559
560 hdmi->aspect_ratio = v4l2_calc_aspect_ratio(edid->edid[0x15],
561 edid->edid[0x16]);
562
563 err = adv748x_hdmi_edid_write_block(hdmi, 128 * edid->blocks,
564 hdmi->edid.edid);
565 if (err < 0) {
566 v4l2_err(sd, "error %d writing edid pad %d\n", err, edid->pad);
567 return err;
568 }
569
570 repeater_write(state, ADV748X_REPEATER_EDID_SZ,
571 edid->blocks << ADV748X_REPEATER_EDID_SZ_SHIFT);
572
573 repeater_write(state, ADV748X_REPEATER_EDID_CTL,
574 ADV748X_REPEATER_EDID_CTL_EN);
575
576 return 0;
577 }
578
adv748x_hdmi_check_dv_timings(const struct v4l2_dv_timings * timings,void * hdl)579 static bool adv748x_hdmi_check_dv_timings(const struct v4l2_dv_timings *timings,
580 void *hdl)
581 {
582 const struct adv748x_hdmi_video_standards *stds =
583 adv748x_hdmi_video_standards;
584 unsigned int i;
585
586 for (i = 0; stds[i].timings.bt.width; i++)
587 if (v4l2_match_dv_timings(timings, &stds[i].timings, 0, false))
588 return true;
589
590 return false;
591 }
592
adv748x_hdmi_enum_dv_timings(struct v4l2_subdev * sd,struct v4l2_enum_dv_timings * timings)593 static int adv748x_hdmi_enum_dv_timings(struct v4l2_subdev *sd,
594 struct v4l2_enum_dv_timings *timings)
595 {
596 return v4l2_enum_dv_timings_cap(timings, &adv748x_hdmi_timings_cap,
597 adv748x_hdmi_check_dv_timings, NULL);
598 }
599
adv748x_hdmi_dv_timings_cap(struct v4l2_subdev * sd,struct v4l2_dv_timings_cap * cap)600 static int adv748x_hdmi_dv_timings_cap(struct v4l2_subdev *sd,
601 struct v4l2_dv_timings_cap *cap)
602 {
603 *cap = adv748x_hdmi_timings_cap;
604 return 0;
605 }
606
607 static const struct v4l2_subdev_pad_ops adv748x_pad_ops_hdmi = {
608 .enum_mbus_code = adv748x_hdmi_enum_mbus_code,
609 .set_fmt = adv748x_hdmi_set_format,
610 .get_fmt = adv748x_hdmi_get_format,
611 .get_edid = adv748x_hdmi_get_edid,
612 .set_edid = adv748x_hdmi_set_edid,
613 .dv_timings_cap = adv748x_hdmi_dv_timings_cap,
614 .enum_dv_timings = adv748x_hdmi_enum_dv_timings,
615 };
616
617 /* -----------------------------------------------------------------------------
618 * v4l2_subdev_ops
619 */
620
621 static const struct v4l2_subdev_ops adv748x_ops_hdmi = {
622 .video = &adv748x_video_ops_hdmi,
623 .pad = &adv748x_pad_ops_hdmi,
624 };
625
626 /* -----------------------------------------------------------------------------
627 * Controls
628 */
629
630 static const char * const hdmi_ctrl_patgen_menu[] = {
631 "Disabled",
632 "Solid Color",
633 "Color Bars",
634 "Ramp Grey",
635 "Ramp Blue",
636 "Ramp Red",
637 "Checkered"
638 };
639
adv748x_hdmi_s_ctrl(struct v4l2_ctrl * ctrl)640 static int adv748x_hdmi_s_ctrl(struct v4l2_ctrl *ctrl)
641 {
642 struct adv748x_hdmi *hdmi = adv748x_ctrl_to_hdmi(ctrl);
643 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
644 int ret;
645 u8 pattern;
646
647 /* Enable video adjustment first */
648 ret = cp_clrset(state, ADV748X_CP_VID_ADJ,
649 ADV748X_CP_VID_ADJ_ENABLE,
650 ADV748X_CP_VID_ADJ_ENABLE);
651 if (ret < 0)
652 return ret;
653
654 switch (ctrl->id) {
655 case V4L2_CID_BRIGHTNESS:
656 ret = cp_write(state, ADV748X_CP_BRI, ctrl->val);
657 break;
658 case V4L2_CID_HUE:
659 ret = cp_write(state, ADV748X_CP_HUE, ctrl->val);
660 break;
661 case V4L2_CID_CONTRAST:
662 ret = cp_write(state, ADV748X_CP_CON, ctrl->val);
663 break;
664 case V4L2_CID_SATURATION:
665 ret = cp_write(state, ADV748X_CP_SAT, ctrl->val);
666 break;
667 case V4L2_CID_TEST_PATTERN:
668 pattern = ctrl->val;
669
670 /* Pattern is 0-indexed. Ctrl Menu is 1-indexed */
671 if (pattern) {
672 pattern--;
673 pattern |= ADV748X_CP_PAT_GEN_EN;
674 }
675
676 ret = cp_write(state, ADV748X_CP_PAT_GEN, pattern);
677
678 break;
679 default:
680 return -EINVAL;
681 }
682
683 return ret;
684 }
685
686 static const struct v4l2_ctrl_ops adv748x_hdmi_ctrl_ops = {
687 .s_ctrl = adv748x_hdmi_s_ctrl,
688 };
689
adv748x_hdmi_init_controls(struct adv748x_hdmi * hdmi)690 static int adv748x_hdmi_init_controls(struct adv748x_hdmi *hdmi)
691 {
692 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
693
694 v4l2_ctrl_handler_init(&hdmi->ctrl_hdl, 5);
695
696 /* Use our mutex for the controls */
697 hdmi->ctrl_hdl.lock = &state->mutex;
698
699 v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
700 V4L2_CID_BRIGHTNESS, ADV748X_CP_BRI_MIN,
701 ADV748X_CP_BRI_MAX, 1, ADV748X_CP_BRI_DEF);
702 v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
703 V4L2_CID_CONTRAST, ADV748X_CP_CON_MIN,
704 ADV748X_CP_CON_MAX, 1, ADV748X_CP_CON_DEF);
705 v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
706 V4L2_CID_SATURATION, ADV748X_CP_SAT_MIN,
707 ADV748X_CP_SAT_MAX, 1, ADV748X_CP_SAT_DEF);
708 v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
709 V4L2_CID_HUE, ADV748X_CP_HUE_MIN,
710 ADV748X_CP_HUE_MAX, 1, ADV748X_CP_HUE_DEF);
711
712 /*
713 * Todo: V4L2_CID_DV_RX_POWER_PRESENT should also be supported when
714 * interrupts are handled correctly
715 */
716
717 v4l2_ctrl_new_std_menu_items(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
718 V4L2_CID_TEST_PATTERN,
719 ARRAY_SIZE(hdmi_ctrl_patgen_menu) - 1,
720 0, 0, hdmi_ctrl_patgen_menu);
721
722 hdmi->sd.ctrl_handler = &hdmi->ctrl_hdl;
723 if (hdmi->ctrl_hdl.error) {
724 v4l2_ctrl_handler_free(&hdmi->ctrl_hdl);
725 return hdmi->ctrl_hdl.error;
726 }
727
728 return v4l2_ctrl_handler_setup(&hdmi->ctrl_hdl);
729 }
730
adv748x_hdmi_init(struct adv748x_hdmi * hdmi)731 int adv748x_hdmi_init(struct adv748x_hdmi *hdmi)
732 {
733 struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
734 struct v4l2_dv_timings cea1280x720 = V4L2_DV_BT_CEA_1280X720P30;
735 int ret;
736
737 adv748x_hdmi_s_dv_timings(&hdmi->sd, &cea1280x720);
738
739 /* Initialise a default 16:9 aspect ratio */
740 hdmi->aspect_ratio.numerator = 16;
741 hdmi->aspect_ratio.denominator = 9;
742
743 adv748x_subdev_init(&hdmi->sd, state, &adv748x_ops_hdmi,
744 MEDIA_ENT_F_IO_DTV, "hdmi");
745
746 hdmi->pads[ADV748X_HDMI_SINK].flags = MEDIA_PAD_FL_SINK;
747 hdmi->pads[ADV748X_HDMI_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
748
749 ret = media_entity_pads_init(&hdmi->sd.entity,
750 ADV748X_HDMI_NR_PADS, hdmi->pads);
751 if (ret)
752 return ret;
753
754 ret = adv748x_hdmi_init_controls(hdmi);
755 if (ret)
756 goto err_free_media;
757
758 return 0;
759
760 err_free_media:
761 media_entity_cleanup(&hdmi->sd.entity);
762
763 return ret;
764 }
765
adv748x_hdmi_cleanup(struct adv748x_hdmi * hdmi)766 void adv748x_hdmi_cleanup(struct adv748x_hdmi *hdmi)
767 {
768 v4l2_device_unregister_subdev(&hdmi->sd);
769 media_entity_cleanup(&hdmi->sd.entity);
770 v4l2_ctrl_handler_free(&hdmi->ctrl_hdl);
771 }
772