drivers/media/i2c/adv748x/adv748x-hdmi.c

   1 /*
   2  * Driver for Analog Devices ADV748X HDMI receiver and Component Processor (CP)
   3  *
   4  * Copyright (C) 2017 Renesas Electronics Corp.
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/mutex.h>
  14
  15 #include <media/v4l2-ctrls.h>
  16 #include <media/v4l2-device.h>
  17 #include <media/v4l2-dv-timings.h>
  18 #include <media/v4l2-ioctl.h>
  19
  20 #include <uapi/linux/v4l2-dv-timings.h>
  21
  22 #include "adv748x.h"
  23
  24 /* -----------------------------------------------------------------------------
  25  * HDMI and CP
  26  */
  27
  28 #define ADV748X_HDMI_MIN_WIDTH          640
  29 #define ADV748X_HDMI_MAX_WIDTH          1920
  30 #define ADV748X_HDMI_MIN_HEIGHT         480
  31 #define ADV748X_HDMI_MAX_HEIGHT         1200
  32
  33 /* V4L2_DV_BT_CEA_720X480I59_94 - 0.5 MHz */
  34 #define ADV748X_HDMI_MIN_PIXELCLOCK     13000000
  35 /* V4L2_DV_BT_DMT_1600X1200P60 */
  36 #define ADV748X_HDMI_MAX_PIXELCLOCK     162000000
  37
  38 static const struct v4l2_dv_timings_cap adv748x_hdmi_timings_cap = {
  39         .type = V4L2_DV_BT_656_1120,
  40         /* keep this initialization for compatibility with GCC < 4.4.6 */
  41         .reserved = { 0 },
  42
  43         V4L2_INIT_BT_TIMINGS(ADV748X_HDMI_MIN_WIDTH, ADV748X_HDMI_MAX_WIDTH,
  44                              ADV748X_HDMI_MIN_HEIGHT, ADV748X_HDMI_MAX_HEIGHT,
  45                              ADV748X_HDMI_MIN_PIXELCLOCK,
  46                              ADV748X_HDMI_MAX_PIXELCLOCK,
  47                              V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT,
  48                              V4L2_DV_BT_CAP_PROGRESSIVE)
  49 };
  50
  51 struct adv748x_hdmi_video_standards {
  52         struct v4l2_dv_timings timings;
  53         u8 vid_std;
  54         u8 v_freq;
  55 };
  56
  57 static const struct adv748x_hdmi_video_standards
  58 adv748x_hdmi_video_standards[] = {
  59         { V4L2_DV_BT_CEA_720X480P59_94, 0x4a, 0x00 },
  60         { V4L2_DV_BT_CEA_720X576P50, 0x4b, 0x00 },
  61         { V4L2_DV_BT_CEA_1280X720P60, 0x53, 0x00 },
  62         { V4L2_DV_BT_CEA_1280X720P50, 0x53, 0x01 },
  63         { V4L2_DV_BT_CEA_1280X720P30, 0x53, 0x02 },
  64         { V4L2_DV_BT_CEA_1280X720P25, 0x53, 0x03 },
  65         { V4L2_DV_BT_CEA_1280X720P24, 0x53, 0x04 },
  66         { V4L2_DV_BT_CEA_1920X1080P60, 0x5e, 0x00 },
  67         { V4L2_DV_BT_CEA_1920X1080P50, 0x5e, 0x01 },
  68         { V4L2_DV_BT_CEA_1920X1080P30, 0x5e, 0x02 },
  69         { V4L2_DV_BT_CEA_1920X1080P25, 0x5e, 0x03 },
  70         { V4L2_DV_BT_CEA_1920X1080P24, 0x5e, 0x04 },
  71         /* SVGA */
  72         { V4L2_DV_BT_DMT_800X600P56, 0x80, 0x00 },
  73         { V4L2_DV_BT_DMT_800X600P60, 0x81, 0x00 },
  74         { V4L2_DV_BT_DMT_800X600P72, 0x82, 0x00 },
  75         { V4L2_DV_BT_DMT_800X600P75, 0x83, 0x00 },
  76         { V4L2_DV_BT_DMT_800X600P85, 0x84, 0x00 },
  77         /* SXGA */
  78         { V4L2_DV_BT_DMT_1280X1024P60, 0x85, 0x00 },
  79         { V4L2_DV_BT_DMT_1280X1024P75, 0x86, 0x00 },
  80         /* VGA */
  81         { V4L2_DV_BT_DMT_640X480P60, 0x88, 0x00 },
  82         { V4L2_DV_BT_DMT_640X480P72, 0x89, 0x00 },
  83         { V4L2_DV_BT_DMT_640X480P75, 0x8a, 0x00 },
  84         { V4L2_DV_BT_DMT_640X480P85, 0x8b, 0x00 },
  85         /* XGA */
  86         { V4L2_DV_BT_DMT_1024X768P60, 0x8c, 0x00 },
  87         { V4L2_DV_BT_DMT_1024X768P70, 0x8d, 0x00 },
  88         { V4L2_DV_BT_DMT_1024X768P75, 0x8e, 0x00 },
  89         { V4L2_DV_BT_DMT_1024X768P85, 0x8f, 0x00 },
  90         /* UXGA */
  91         { V4L2_DV_BT_DMT_1600X1200P60, 0x96, 0x00 },
  92 };
  93
  94 static void adv748x_hdmi_fill_format(struct adv748x_hdmi *hdmi,
  95                                      struct v4l2_mbus_framefmt *fmt)
  96 {
  97         memset(fmt, 0, sizeof(*fmt));
  98
  99         fmt->code = MEDIA_BUS_FMT_RGB888_1X24;
 100         fmt->field = hdmi->timings.bt.interlaced ?
 101                         V4L2_FIELD_ALTERNATE : V4L2_FIELD_NONE;
 102
 103         /* TODO: The colorspace depends on the AVI InfoFrame contents */
 104         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 105
 106         fmt->width = hdmi->timings.bt.width;
 107         fmt->height = hdmi->timings.bt.height;
 108
 109         if (fmt->field == V4L2_FIELD_ALTERNATE)
 110                 fmt->height /= 2;
 111 }
 112
 113 static void adv748x_fill_optional_dv_timings(struct v4l2_dv_timings *timings)
 114 {
 115         v4l2_find_dv_timings_cap(timings, &adv748x_hdmi_timings_cap,
 116                                  250000, NULL, NULL);
 117 }
 118
 119 static bool adv748x_hdmi_has_signal(struct adv748x_state *state)
 120 {
 121         int val;
 122
 123         /* Check that VERT_FILTER and DE_REGEN is locked */
 124         val = hdmi_read(state, ADV748X_HDMI_LW1);
 125         return (val & ADV748X_HDMI_LW1_VERT_FILTER) &&
 126                (val & ADV748X_HDMI_LW1_DE_REGEN);
 127 }
 128
 129 static int adv748x_hdmi_read_pixelclock(struct adv748x_state *state)
 130 {
 131         int a, b;
 132
 133         a = hdmi_read(state, ADV748X_HDMI_TMDS_1);
 134         b = hdmi_read(state, ADV748X_HDMI_TMDS_2);
 135         if (a < 0 || b < 0)
 136                 return -ENODATA;
 137
 138         /*
 139          * The high 9 bits store TMDS frequency measurement in MHz
 140          * The low 7 bits of TMDS_2 store the 7-bit TMDS fractional frequency
 141          * measurement in 1/128 MHz
 142          */
 143         return ((a << 1) | (b >> 7)) * 1000000 + (b & 0x7f) * 1000000 / 128;
 144 }
 145
 146 /*
 147  * adv748x_hdmi_set_de_timings: Adjust horizontal picture offset through DE
 148  *
 149  * HDMI CP uses a Data Enable synchronisation timing reference
 150  *
 151  * Vary the leading and trailing edge position of the DE signal output by the CP
 152  * core. Values are stored as signed-twos-complement in one-pixel-clock units
 153  *
 154  * The start and end are shifted equally by the 10-bit shift value.
 155  */
 156 static void adv748x_hdmi_set_de_timings(struct adv748x_state *state, int shift)
 157 {
 158         u8 high, low;
 159
 160         /* POS_HIGH stores bits 8 and 9 of both the start and end */
 161         high = ADV748X_CP_DE_POS_HIGH_SET;
 162         high |= (shift & 0x300) >> 8;
 163         low = shift & 0xff;
 164
 165         /* The sequence of the writes is important and must be followed */
 166         cp_write(state, ADV748X_CP_DE_POS_HIGH, high);
 167         cp_write(state, ADV748X_CP_DE_POS_END_LOW, low);
 168
 169         high |= (shift & 0x300) >> 6;
 170
 171         cp_write(state, ADV748X_CP_DE_POS_HIGH, high);
 172         cp_write(state, ADV748X_CP_DE_POS_START_LOW, low);
 173 }
 174
 175 static int adv748x_hdmi_set_video_timings(struct adv748x_state *state,
 176                                           const struct v4l2_dv_timings *timings)
 177 {
 178         const struct adv748x_hdmi_video_standards *stds =
 179                 adv748x_hdmi_video_standards;
 180         unsigned int i;
 181
 182         for (i = 0; i < ARRAY_SIZE(adv748x_hdmi_video_standards); i++) {
 183                 if (!v4l2_match_dv_timings(timings, &stds[i].timings, 250000,
 184                                            false))
 185                         continue;
 186         }
 187
 188         if (i >= ARRAY_SIZE(adv748x_hdmi_video_standards))
 189                 return -EINVAL;
 190
 191         /*
 192          * When setting cp_vid_std to either 720p, 1080i, or 1080p, the video
 193          * will get shifted horizontally to the left in active video mode.
 194          * The de_h_start and de_h_end controls are used to centre the picture
 195          * correctly
 196          */
 197         switch (stds[i].vid_std) {
 198         case 0x53: /* 720p */
 199                 adv748x_hdmi_set_de_timings(state, -40);
 200                 break;
 201         case 0x54: /* 1080i */
 202         case 0x5e: /* 1080p */
 203                 adv748x_hdmi_set_de_timings(state, -44);
 204                 break;
 205         default:
 206                 adv748x_hdmi_set_de_timings(state, 0);
 207                 break;
 208         }
 209
 210         io_write(state, ADV748X_IO_VID_STD, stds[i].vid_std);
 211         io_clrset(state, ADV748X_IO_DATAPATH, ADV748X_IO_DATAPATH_VFREQ_M,
 212                   stds[i].v_freq << ADV748X_IO_DATAPATH_VFREQ_SHIFT);
 213
 214         return 0;
 215 }
 216
 217 /* -----------------------------------------------------------------------------
 218  * v4l2_subdev_video_ops
 219  */
 220
 221 static int adv748x_hdmi_s_dv_timings(struct v4l2_subdev *sd,
 222                                      struct v4l2_dv_timings *timings)
 223 {
 224         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 225         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 226         int ret;
 227
 228         if (!timings)
 229                 return -EINVAL;
 230
 231         if (v4l2_match_dv_timings(&hdmi->timings, timings, 0, false))
 232                 return 0;
 233
 234         if (!v4l2_valid_dv_timings(timings, &adv748x_hdmi_timings_cap,
 235                                    NULL, NULL))
 236                 return -ERANGE;
 237
 238         adv748x_fill_optional_dv_timings(timings);
 239
 240         mutex_lock(&state->mutex);
 241
 242         ret = adv748x_hdmi_set_video_timings(state, timings);
 243         if (ret)
 244                 goto error;
 245
 246         hdmi->timings = *timings;
 247
 248         cp_clrset(state, ADV748X_CP_VID_ADJ_2, ADV748X_CP_VID_ADJ_2_INTERLACED,
 249                   timings->bt.interlaced ?
 250                                   ADV748X_CP_VID_ADJ_2_INTERLACED : 0);
 251
 252         mutex_unlock(&state->mutex);
 253
 254         return 0;
 255
 256 error:
 257         mutex_unlock(&state->mutex);
 258         return ret;
 259 }
 260
 261 static int adv748x_hdmi_g_dv_timings(struct v4l2_subdev *sd,
 262                                      struct v4l2_dv_timings *timings)
 263 {
 264         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 265         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 266
 267         mutex_lock(&state->mutex);
 268
 269         *timings = hdmi->timings;
 270
 271         mutex_unlock(&state->mutex);
 272
 273         return 0;
 274 }
 275
 276 static int adv748x_hdmi_query_dv_timings(struct v4l2_subdev *sd,
 277                                          struct v4l2_dv_timings *timings)
 278 {
 279         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 280         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 281         struct v4l2_bt_timings *bt = &timings->bt;
 282         int pixelclock;
 283         int polarity;
 284
 285         if (!timings)
 286                 return -EINVAL;
 287
 288         memset(timings, 0, sizeof(struct v4l2_dv_timings));
 289
 290         if (!adv748x_hdmi_has_signal(state))
 291                 return -ENOLINK;
 292
 293         pixelclock = adv748x_hdmi_read_pixelclock(state);
 294         if (pixelclock < 0)
 295                 return -ENODATA;
 296
 297         timings->type = V4L2_DV_BT_656_1120;
 298
 299         bt->pixelclock = pixelclock;
 300         bt->interlaced = hdmi_read(state, ADV748X_HDMI_F1H1) &
 301                                 ADV748X_HDMI_F1H1_INTERLACED ?
 302                                 V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
 303         bt->width = hdmi_read16(state, ADV748X_HDMI_LW1,
 304                                 ADV748X_HDMI_LW1_WIDTH_MASK);
 305         bt->height = hdmi_read16(state, ADV748X_HDMI_F0H1,
 306                                  ADV748X_HDMI_F0H1_HEIGHT_MASK);
 307         bt->hfrontporch = hdmi_read16(state, ADV748X_HDMI_HFRONT_PORCH,
 308                                       ADV748X_HDMI_HFRONT_PORCH_MASK);
 309         bt->hsync = hdmi_read16(state, ADV748X_HDMI_HSYNC_WIDTH,
 310                                 ADV748X_HDMI_HSYNC_WIDTH_MASK);
 311         bt->hbackporch = hdmi_read16(state, ADV748X_HDMI_HBACK_PORCH,
 312                                      ADV748X_HDMI_HBACK_PORCH_MASK);
 313         bt->vfrontporch = hdmi_read16(state, ADV748X_HDMI_VFRONT_PORCH,
 314                                       ADV748X_HDMI_VFRONT_PORCH_MASK) / 2;
 315         bt->vsync = hdmi_read16(state, ADV748X_HDMI_VSYNC_WIDTH,
 316                                 ADV748X_HDMI_VSYNC_WIDTH_MASK) / 2;
 317         bt->vbackporch = hdmi_read16(state, ADV748X_HDMI_VBACK_PORCH,
 318                                      ADV748X_HDMI_VBACK_PORCH_MASK) / 2;
 319
 320         polarity = hdmi_read(state, 0x05);
 321         bt->polarities = (polarity & BIT(4) ? V4L2_DV_VSYNC_POS_POL : 0) |
 322                 (polarity & BIT(5) ? V4L2_DV_HSYNC_POS_POL : 0);
 323
 324         if (bt->interlaced == V4L2_DV_INTERLACED) {
 325                 bt->height += hdmi_read16(state, 0x0b, 0x1fff);
 326                 bt->il_vfrontporch = hdmi_read16(state, 0x2c, 0x3fff) / 2;
 327                 bt->il_vsync = hdmi_read16(state, 0x30, 0x3fff) / 2;
 328                 bt->il_vbackporch = hdmi_read16(state, 0x34, 0x3fff) / 2;
 329         }
 330
 331         adv748x_fill_optional_dv_timings(timings);
 332
 333         /*
 334          * No interrupt handling is implemented yet.
 335          * There should be an IRQ when a cable is plugged and the new timings
 336          * should be figured out and stored to state.
 337          */
 338         hdmi->timings = *timings;
 339
 340         return 0;
 341 }
 342
 343 static int adv748x_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
 344 {
 345         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 346         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 347
 348         mutex_lock(&state->mutex);
 349
 350         *status = adv748x_hdmi_has_signal(state) ? 0 : V4L2_IN_ST_NO_SIGNAL;
 351
 352         mutex_unlock(&state->mutex);
 353
 354         return 0;
 355 }
 356
 357 static int adv748x_hdmi_s_stream(struct v4l2_subdev *sd, int enable)
 358 {
 359         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 360         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 361         int ret;
 362
 363         mutex_lock(&state->mutex);
 364
 365         ret = adv748x_txa_power(state, enable);
 366         if (ret)
 367                 goto done;
 368
 369         if (adv748x_hdmi_has_signal(state))
 370                 adv_dbg(state, "Detected HDMI signal\n");
 371         else
 372                 adv_dbg(state, "Couldn't detect HDMI video signal\n");
 373
 374 done:
 375         mutex_unlock(&state->mutex);
 376         return ret;
 377 }
 378
 379 static int adv748x_hdmi_g_pixelaspect(struct v4l2_subdev *sd,
 380                                       struct v4l2_fract *aspect)
 381 {
 382         aspect->numerator = 1;
 383         aspect->denominator = 1;
 384
 385         return 0;
 386 }
 387
 388 static const struct v4l2_subdev_video_ops adv748x_video_ops_hdmi = {
 389         .s_dv_timings = adv748x_hdmi_s_dv_timings,
 390         .g_dv_timings = adv748x_hdmi_g_dv_timings,
 391         .query_dv_timings = adv748x_hdmi_query_dv_timings,
 392         .g_input_status = adv748x_hdmi_g_input_status,
 393         .s_stream = adv748x_hdmi_s_stream,
 394         .g_pixelaspect = adv748x_hdmi_g_pixelaspect,
 395 };
 396
 397 /* -----------------------------------------------------------------------------
 398  * v4l2_subdev_pad_ops
 399  */
 400
 401 static int adv748x_hdmi_propagate_pixelrate(struct adv748x_hdmi *hdmi)
 402 {
 403         struct v4l2_subdev *tx;
 404         struct v4l2_dv_timings timings;
 405
 406         tx = adv748x_get_remote_sd(&hdmi->pads[ADV748X_HDMI_SOURCE]);
 407         if (!tx)
 408                 return -ENOLINK;
 409
 410         adv748x_hdmi_query_dv_timings(&hdmi->sd, &timings);
 411
 412         return adv748x_csi2_set_pixelrate(tx, timings.bt.pixelclock);
 413 }
 414
 415 static int adv748x_hdmi_enum_mbus_code(struct v4l2_subdev *sd,
 416                                   struct v4l2_subdev_pad_config *cfg,
 417                                   struct v4l2_subdev_mbus_code_enum *code)
 418 {
 419         if (code->index != 0)
 420                 return -EINVAL;
 421
 422         code->code = MEDIA_BUS_FMT_RGB888_1X24;
 423
 424         return 0;
 425 }
 426
 427 static int adv748x_hdmi_get_format(struct v4l2_subdev *sd,
 428                                    struct v4l2_subdev_pad_config *cfg,
 429                                    struct v4l2_subdev_format *sdformat)
 430 {
 431         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 432         struct v4l2_mbus_framefmt *mbusformat;
 433
 434         if (sdformat->pad != ADV748X_HDMI_SOURCE)
 435                 return -EINVAL;
 436
 437         if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) {
 438                 mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
 439                 sdformat->format = *mbusformat;
 440         } else {
 441                 adv748x_hdmi_fill_format(hdmi, &sdformat->format);
 442                 adv748x_hdmi_propagate_pixelrate(hdmi);
 443         }
 444
 445         return 0;
 446 }
 447
 448 static int adv748x_hdmi_set_format(struct v4l2_subdev *sd,
 449                                    struct v4l2_subdev_pad_config *cfg,
 450                                    struct v4l2_subdev_format *sdformat)
 451 {
 452         struct v4l2_mbus_framefmt *mbusformat;
 453
 454         if (sdformat->pad != ADV748X_HDMI_SOURCE)
 455                 return -EINVAL;
 456
 457         if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 458                 return adv748x_hdmi_get_format(sd, cfg, sdformat);
 459
 460         mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
 461         *mbusformat = sdformat->format;
 462
 463         return 0;
 464 }
 465
 466 static int adv748x_hdmi_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
 467 {
 468         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 469
 470         memset(edid->reserved, 0, sizeof(edid->reserved));
 471
 472         if (!hdmi->edid.present)
 473                 return -ENODATA;
 474
 475         if (edid->start_block == 0 && edid->blocks == 0) {
 476                 edid->blocks = hdmi->edid.blocks;
 477                 return 0;
 478         }
 479
 480         if (edid->start_block >= hdmi->edid.blocks)
 481                 return -EINVAL;
 482
 483         if (edid->start_block + edid->blocks > hdmi->edid.blocks)
 484                 edid->blocks = hdmi->edid.blocks - edid->start_block;
 485
 486         memcpy(edid->edid, hdmi->edid.edid + edid->start_block * 128,
 487                         edid->blocks * 128);
 488
 489         return 0;
 490 }
 491
 492 static inline int adv748x_hdmi_edid_write_block(struct adv748x_hdmi *hdmi,
 493                                         unsigned int total_len, const u8 *val)
 494 {
 495         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 496         int err = 0;
 497         int i = 0;
 498         int len = 0;
 499
 500         adv_dbg(state, "%s: write EDID block (%d byte)\n",
 501                                 __func__, total_len);
 502
 503         while (!err && i < total_len) {
 504                 len = (total_len - i) > I2C_SMBUS_BLOCK_MAX ?
 505                                 I2C_SMBUS_BLOCK_MAX :
 506                                 (total_len - i);
 507
 508                 err = adv748x_write_block(state, ADV748X_PAGE_EDID,
 509                                 i, val + i, len);
 510                 i += len;
 511         }
 512
 513         return err;
 514 }
 515
 516 static int adv748x_hdmi_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
 517 {
 518         struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
 519         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 520         int err;
 521
 522         memset(edid->reserved, 0, sizeof(edid->reserved));
 523
 524         if (edid->start_block != 0)
 525                 return -EINVAL;
 526
 527         if (edid->blocks == 0) {
 528                 hdmi->edid.blocks = 0;
 529                 hdmi->edid.present = 0;
 530
 531                 /* Fall back to a 16:9 aspect ratio */
 532                 hdmi->aspect_ratio.numerator = 16;
 533                 hdmi->aspect_ratio.denominator = 9;
 534
 535                 /* Disable the EDID */
 536                 repeater_write(state, ADV748X_REPEATER_EDID_SZ,
 537                                edid->blocks << ADV748X_REPEATER_EDID_SZ_SHIFT);
 538
 539                 repeater_write(state, ADV748X_REPEATER_EDID_CTL, 0);
 540
 541                 return 0;
 542         }
 543
 544         if (edid->blocks > 4) {
 545                 edid->blocks = 4;
 546                 return -E2BIG;
 547         }
 548
 549         memcpy(hdmi->edid.edid, edid->edid, 128 * edid->blocks);
 550         hdmi->edid.blocks = edid->blocks;
 551         hdmi->edid.present = true;
 552
 553         hdmi->aspect_ratio = v4l2_calc_aspect_ratio(edid->edid[0x15],
 554                         edid->edid[0x16]);
 555
 556         err = adv748x_hdmi_edid_write_block(hdmi, 128 * edid->blocks,
 557                         hdmi->edid.edid);
 558         if (err < 0) {
 559                 v4l2_err(sd, "error %d writing edid pad %d\n", err, edid->pad);
 560                 return err;
 561         }
 562
 563         repeater_write(state, ADV748X_REPEATER_EDID_SZ,
 564                        edid->blocks << ADV748X_REPEATER_EDID_SZ_SHIFT);
 565
 566         repeater_write(state, ADV748X_REPEATER_EDID_CTL,
 567                        ADV748X_REPEATER_EDID_CTL_EN);
 568
 569         return 0;
 570 }
 571
 572 static bool adv748x_hdmi_check_dv_timings(const struct v4l2_dv_timings *timings,
 573                                           void *hdl)
 574 {
 575         const struct adv748x_hdmi_video_standards *stds =
 576                 adv748x_hdmi_video_standards;
 577         unsigned int i;
 578
 579         for (i = 0; stds[i].timings.bt.width; i++)
 580                 if (v4l2_match_dv_timings(timings, &stds[i].timings, 0, false))
 581                         return true;
 582
 583         return false;
 584 }
 585
 586 static int adv748x_hdmi_enum_dv_timings(struct v4l2_subdev *sd,
 587                                         struct v4l2_enum_dv_timings *timings)
 588 {
 589         return v4l2_enum_dv_timings_cap(timings, &adv748x_hdmi_timings_cap,
 590                                         adv748x_hdmi_check_dv_timings, NULL);
 591 }
 592
 593 static int adv748x_hdmi_dv_timings_cap(struct v4l2_subdev *sd,
 594                                        struct v4l2_dv_timings_cap *cap)
 595 {
 596         *cap = adv748x_hdmi_timings_cap;
 597         return 0;
 598 }
 599
 600 static const struct v4l2_subdev_pad_ops adv748x_pad_ops_hdmi = {
 601         .enum_mbus_code = adv748x_hdmi_enum_mbus_code,
 602         .set_fmt = adv748x_hdmi_set_format,
 603         .get_fmt = adv748x_hdmi_get_format,
 604         .get_edid = adv748x_hdmi_get_edid,
 605         .set_edid = adv748x_hdmi_set_edid,
 606         .dv_timings_cap = adv748x_hdmi_dv_timings_cap,
 607         .enum_dv_timings = adv748x_hdmi_enum_dv_timings,
 608 };
 609
 610 /* -----------------------------------------------------------------------------
 611  * v4l2_subdev_ops
 612  */
 613
 614 static const struct v4l2_subdev_ops adv748x_ops_hdmi = {
 615         .video = &adv748x_video_ops_hdmi,
 616         .pad = &adv748x_pad_ops_hdmi,
 617 };
 618
 619 /* -----------------------------------------------------------------------------
 620  * Controls
 621  */
 622
 623 static const char * const hdmi_ctrl_patgen_menu[] = {
 624         "Disabled",
 625         "Solid Color",
 626         "Color Bars",
 627         "Ramp Grey",
 628         "Ramp Blue",
 629         "Ramp Red",
 630         "Checkered"
 631 };
 632
 633 static int adv748x_hdmi_s_ctrl(struct v4l2_ctrl *ctrl)
 634 {
 635         struct adv748x_hdmi *hdmi = adv748x_ctrl_to_hdmi(ctrl);
 636         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 637         int ret;
 638         u8 pattern;
 639
 640         /* Enable video adjustment first */
 641         ret = cp_clrset(state, ADV748X_CP_VID_ADJ,
 642                         ADV748X_CP_VID_ADJ_ENABLE,
 643                         ADV748X_CP_VID_ADJ_ENABLE);
 644         if (ret < 0)
 645                 return ret;
 646
 647         switch (ctrl->id) {
 648         case V4L2_CID_BRIGHTNESS:
 649                 ret = cp_write(state, ADV748X_CP_BRI, ctrl->val);
 650                 break;
 651         case V4L2_CID_HUE:
 652                 ret = cp_write(state, ADV748X_CP_HUE, ctrl->val);
 653                 break;
 654         case V4L2_CID_CONTRAST:
 655                 ret = cp_write(state, ADV748X_CP_CON, ctrl->val);
 656                 break;
 657         case V4L2_CID_SATURATION:
 658                 ret = cp_write(state, ADV748X_CP_SAT, ctrl->val);
 659                 break;
 660         case V4L2_CID_TEST_PATTERN:
 661                 pattern = ctrl->val;
 662
 663                 /* Pattern is 0-indexed. Ctrl Menu is 1-indexed */
 664                 if (pattern) {
 665                         pattern--;
 666                         pattern |= ADV748X_CP_PAT_GEN_EN;
 667                 }
 668
 669                 ret = cp_write(state, ADV748X_CP_PAT_GEN, pattern);
 670
 671                 break;
 672         default:
 673                 return -EINVAL;
 674         }
 675
 676         return ret;
 677 }
 678
 679 static const struct v4l2_ctrl_ops adv748x_hdmi_ctrl_ops = {
 680         .s_ctrl = adv748x_hdmi_s_ctrl,
 681 };
 682
 683 static int adv748x_hdmi_init_controls(struct adv748x_hdmi *hdmi)
 684 {
 685         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 686
 687         v4l2_ctrl_handler_init(&hdmi->ctrl_hdl, 5);
 688
 689         /* Use our mutex for the controls */
 690         hdmi->ctrl_hdl.lock = &state->mutex;
 691
 692         v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
 693                           V4L2_CID_BRIGHTNESS, ADV748X_CP_BRI_MIN,
 694                           ADV748X_CP_BRI_MAX, 1, ADV748X_CP_BRI_DEF);
 695         v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
 696                           V4L2_CID_CONTRAST, ADV748X_CP_CON_MIN,
 697                           ADV748X_CP_CON_MAX, 1, ADV748X_CP_CON_DEF);
 698         v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
 699                           V4L2_CID_SATURATION, ADV748X_CP_SAT_MIN,
 700                           ADV748X_CP_SAT_MAX, 1, ADV748X_CP_SAT_DEF);
 701         v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
 702                           V4L2_CID_HUE, ADV748X_CP_HUE_MIN,
 703                           ADV748X_CP_HUE_MAX, 1, ADV748X_CP_HUE_DEF);
 704
 705         /*
 706          * Todo: V4L2_CID_DV_RX_POWER_PRESENT should also be supported when
 707          * interrupts are handled correctly
 708          */
 709
 710         v4l2_ctrl_new_std_menu_items(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
 711                                      V4L2_CID_TEST_PATTERN,
 712                                      ARRAY_SIZE(hdmi_ctrl_patgen_menu) - 1,
 713                                      0, 0, hdmi_ctrl_patgen_menu);
 714
 715         hdmi->sd.ctrl_handler = &hdmi->ctrl_hdl;
 716         if (hdmi->ctrl_hdl.error) {
 717                 v4l2_ctrl_handler_free(&hdmi->ctrl_hdl);
 718                 return hdmi->ctrl_hdl.error;
 719         }
 720
 721         return v4l2_ctrl_handler_setup(&hdmi->ctrl_hdl);
 722 }
 723
 724 int adv748x_hdmi_init(struct adv748x_hdmi *hdmi)
 725 {
 726         struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
 727         static const struct v4l2_dv_timings cea1280x720 =
 728                 V4L2_DV_BT_CEA_1280X720P30;
 729         int ret;
 730
 731         hdmi->timings = cea1280x720;
 732
 733         /* Initialise a default 16:9 aspect ratio */
 734         hdmi->aspect_ratio.numerator = 16;
 735         hdmi->aspect_ratio.denominator = 9;
 736
 737         adv748x_subdev_init(&hdmi->sd, state, &adv748x_ops_hdmi,
 738                             MEDIA_ENT_F_IO_DTV, "hdmi");
 739
 740         hdmi->pads[ADV748X_HDMI_SINK].flags = MEDIA_PAD_FL_SINK;
 741         hdmi->pads[ADV748X_HDMI_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
 742
 743         ret = media_entity_pads_init(&hdmi->sd.entity,
 744                                      ADV748X_HDMI_NR_PADS, hdmi->pads);
 745         if (ret)
 746                 return ret;
 747
 748         ret = adv748x_hdmi_init_controls(hdmi);
 749         if (ret)
 750                 goto err_free_media;
 751
 752         return 0;
 753
 754 err_free_media:
 755         media_entity_cleanup(&hdmi->sd.entity);
 756
 757         return ret;
 758 }
 759
 760 void adv748x_hdmi_cleanup(struct adv748x_hdmi *hdmi)
 761 {
 762         v4l2_device_unregister_subdev(&hdmi->sd);
 763         media_entity_cleanup(&hdmi->sd.entity);
 764         v4l2_ctrl_handler_free(&hdmi->ctrl_hdl);
 765 }