drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

   1 /*
   2  * Analog Devices ADV7511 HDMI transmitter driver
   3  *
   4  * Copyright 2012 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2.
   7  */
   8
   9 #include <linux/device.h>
  10 #include <linux/gpio/consumer.h>
  11 #include <linux/module.h>
  12 #include <linux/of_device.h>
  13 #include <linux/slab.h>
  14
  15 #include <drm/drmP.h>
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_edid.h>
  19
  20 #include "adv7511.h"
  21
  22 /* ADI recommended values for proper operation. */
  23 static const struct reg_sequence adv7511_fixed_registers[] = {
  24         { 0x98, 0x03 },
  25         { 0x9a, 0xe0 },
  26         { 0x9c, 0x30 },
  27         { 0x9d, 0x61 },
  28         { 0xa2, 0xa4 },
  29         { 0xa3, 0xa4 },
  30         { 0xe0, 0xd0 },
  31         { 0xf9, 0x00 },
  32         { 0x55, 0x02 },
  33 };
  34
  35 /* -----------------------------------------------------------------------------
  36  * Register access
  37  */
  38
  39 static const uint8_t adv7511_register_defaults[] = {
  40         0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
  41         0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
  42         0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
  43         0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
  44         0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
  45         0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
  46         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
  47         0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
  48         0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
  49         0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
  50         0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
  51         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  52         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
  53         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  54         0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
  55         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  56         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
  57         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  58         0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
  59         0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
  60         0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
  61         0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
  62         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
  63         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  64         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
  65         0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
  66         0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
  67         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
  68         0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
  69         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  70         0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
  71         0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  72 };
  73
  74 static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
  75 {
  76         switch (reg) {
  77         case ADV7511_REG_CHIP_REVISION:
  78         case ADV7511_REG_SPDIF_FREQ:
  79         case ADV7511_REG_CTS_AUTOMATIC1:
  80         case ADV7511_REG_CTS_AUTOMATIC2:
  81         case ADV7511_REG_VIC_DETECTED:
  82         case ADV7511_REG_VIC_SEND:
  83         case ADV7511_REG_AUX_VIC_DETECTED:
  84         case ADV7511_REG_STATUS:
  85         case ADV7511_REG_GC(1):
  86         case ADV7511_REG_INT(0):
  87         case ADV7511_REG_INT(1):
  88         case ADV7511_REG_PLL_STATUS:
  89         case ADV7511_REG_AN(0):
  90         case ADV7511_REG_AN(1):
  91         case ADV7511_REG_AN(2):
  92         case ADV7511_REG_AN(3):
  93         case ADV7511_REG_AN(4):
  94         case ADV7511_REG_AN(5):
  95         case ADV7511_REG_AN(6):
  96         case ADV7511_REG_AN(7):
  97         case ADV7511_REG_HDCP_STATUS:
  98         case ADV7511_REG_BCAPS:
  99         case ADV7511_REG_BKSV(0):
 100         case ADV7511_REG_BKSV(1):
 101         case ADV7511_REG_BKSV(2):
 102         case ADV7511_REG_BKSV(3):
 103         case ADV7511_REG_BKSV(4):
 104         case ADV7511_REG_DDC_STATUS:
 105         case ADV7511_REG_EDID_READ_CTRL:
 106         case ADV7511_REG_BSTATUS(0):
 107         case ADV7511_REG_BSTATUS(1):
 108         case ADV7511_REG_CHIP_ID_HIGH:
 109         case ADV7511_REG_CHIP_ID_LOW:
 110                 return true;
 111         }
 112
 113         return false;
 114 }
 115
 116 static const struct regmap_config adv7511_regmap_config = {
 117         .reg_bits = 8,
 118         .val_bits = 8,
 119
 120         .max_register = 0xff,
 121         .cache_type = REGCACHE_RBTREE,
 122         .reg_defaults_raw = adv7511_register_defaults,
 123         .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
 124
 125         .volatile_reg = adv7511_register_volatile,
 126 };
 127
 128 /* -----------------------------------------------------------------------------
 129  * Hardware configuration
 130  */
 131
 132 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
 133                                  const uint16_t *coeff,
 134                                  unsigned int scaling_factor)
 135 {
 136         unsigned int i;
 137
 138         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 139                            ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
 140
 141         if (enable) {
 142                 for (i = 0; i < 12; ++i) {
 143                         regmap_update_bits(adv7511->regmap,
 144                                            ADV7511_REG_CSC_UPPER(i),
 145                                            0x1f, coeff[i] >> 8);
 146                         regmap_write(adv7511->regmap,
 147                                      ADV7511_REG_CSC_LOWER(i),
 148                                      coeff[i] & 0xff);
 149                 }
 150         }
 151
 152         if (enable)
 153                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 154                                    0xe0, 0x80 | (scaling_factor << 5));
 155         else
 156                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 157                                    0x80, 0x00);
 158
 159         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 160                            ADV7511_CSC_UPDATE_MODE, 0);
 161 }
 162
 163 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 164 {
 165         if (packet & 0xff)
 166                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 167                                    packet, 0xff);
 168
 169         if (packet & 0xff00) {
 170                 packet >>= 8;
 171                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 172                                    packet, 0xff);
 173         }
 174
 175         return 0;
 176 }
 177
 178 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
 179 {
 180         if (packet & 0xff)
 181                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 182                                    packet, 0x00);
 183
 184         if (packet & 0xff00) {
 185                 packet >>= 8;
 186                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 187                                    packet, 0x00);
 188         }
 189
 190         return 0;
 191 }
 192
 193 /* Coefficients for adv7511 color space conversion */
 194 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
 195         0x0734, 0x04ad, 0x0000, 0x1c1b,
 196         0x1ddc, 0x04ad, 0x1f24, 0x0135,
 197         0x0000, 0x04ad, 0x087c, 0x1b77,
 198 };
 199
 200 static void adv7511_set_config_csc(struct adv7511 *adv7511,
 201                                    struct drm_connector *connector,
 202                                    bool rgb)
 203 {
 204         struct adv7511_video_config config;
 205         bool output_format_422, output_format_ycbcr;
 206         unsigned int mode;
 207         uint8_t infoframe[17];
 208
 209         if (adv7511->edid)
 210                 config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
 211         else
 212                 config.hdmi_mode = false;
 213
 214         hdmi_avi_infoframe_init(&config.avi_infoframe);
 215
 216         config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
 217
 218         if (rgb) {
 219                 config.csc_enable = false;
 220                 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 221         } else {
 222                 config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
 223                 config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
 224
 225                 if ((connector->display_info.color_formats &
 226                      DRM_COLOR_FORMAT_YCRCB422) &&
 227                     config.hdmi_mode) {
 228                         config.csc_enable = false;
 229                         config.avi_infoframe.colorspace =
 230                                 HDMI_COLORSPACE_YUV422;
 231                 } else {
 232                         config.csc_enable = true;
 233                         config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 234                 }
 235         }
 236
 237         if (config.hdmi_mode) {
 238                 mode = ADV7511_HDMI_CFG_MODE_HDMI;
 239
 240                 switch (config.avi_infoframe.colorspace) {
 241                 case HDMI_COLORSPACE_YUV444:
 242                         output_format_422 = false;
 243                         output_format_ycbcr = true;
 244                         break;
 245                 case HDMI_COLORSPACE_YUV422:
 246                         output_format_422 = true;
 247                         output_format_ycbcr = true;
 248                         break;
 249                 default:
 250                         output_format_422 = false;
 251                         output_format_ycbcr = false;
 252                         break;
 253                 }
 254         } else {
 255                 mode = ADV7511_HDMI_CFG_MODE_DVI;
 256                 output_format_422 = false;
 257                 output_format_ycbcr = false;
 258         }
 259
 260         adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 261
 262         adv7511_set_colormap(adv7511, config.csc_enable,
 263                              config.csc_coefficents,
 264                              config.csc_scaling_factor);
 265
 266         regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
 267                            (output_format_422 << 7) | output_format_ycbcr);
 268
 269         regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
 270                            ADV7511_HDMI_CFG_MODE_MASK, mode);
 271
 272         hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
 273                                 sizeof(infoframe));
 274
 275         /* The AVI infoframe id is not configurable */
 276         regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
 277                           infoframe + 1, sizeof(infoframe) - 1);
 278
 279         adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 280 }
 281
 282 static void adv7511_set_link_config(struct adv7511 *adv7511,
 283                                     const struct adv7511_link_config *config)
 284 {
 285         /*
 286          * The input style values documented in the datasheet don't match the
 287          * hardware register field values :-(
 288          */
 289         static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
 290
 291         unsigned int clock_delay;
 292         unsigned int color_depth;
 293         unsigned int input_id;
 294
 295         clock_delay = (config->clock_delay + 1200) / 400;
 296         color_depth = config->input_color_depth == 8 ? 3
 297                     : (config->input_color_depth == 10 ? 1 : 2);
 298
 299         /* TODO Support input ID 6 */
 300         if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
 301                 input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
 302                          ? 5 : 0;
 303         else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
 304                 input_id = config->embedded_sync ? 8 : 7;
 305         else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
 306                 input_id = config->embedded_sync ? 4 : 3;
 307         else
 308                 input_id = config->embedded_sync ? 2 : 1;
 309
 310         regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
 311                            input_id);
 312         regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
 313                            (color_depth << 4) |
 314                            (input_styles[config->input_style] << 2));
 315         regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
 316                      config->input_justification << 3);
 317         regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
 318                      config->sync_pulse << 2);
 319
 320         regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
 321
 322         adv7511->embedded_sync = config->embedded_sync;
 323         adv7511->hsync_polarity = config->hsync_polarity;
 324         adv7511->vsync_polarity = config->vsync_polarity;
 325         adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
 326 }
 327
 328 static void adv7511_power_on(struct adv7511 *adv7511)
 329 {
 330         adv7511->current_edid_segment = -1;
 331
 332         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 333                            ADV7511_POWER_POWER_DOWN, 0);
 334         if (adv7511->i2c_main->irq) {
 335                 /*
 336                  * Documentation says the INT_ENABLE registers are reset in
 337                  * POWER_DOWN mode. My 7511w preserved the bits, however.
 338                  * Still, let's be safe and stick to the documentation.
 339                  */
 340                 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 341                              ADV7511_INT0_EDID_READY);
 342                 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
 343                              ADV7511_INT1_DDC_ERROR);
 344         }
 345
 346         /*
 347          * Per spec it is allowed to pulse the HPD signal to indicate that the
 348          * EDID information has changed. Some monitors do this when they wakeup
 349          * from standby or are enabled. When the HPD goes low the adv7511 is
 350          * reset and the outputs are disabled which might cause the monitor to
 351          * go to standby again. To avoid this we ignore the HPD pin for the
 352          * first few seconds after enabling the output.
 353          */
 354         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 355                            ADV7511_REG_POWER2_HPD_SRC_MASK,
 356                            ADV7511_REG_POWER2_HPD_SRC_NONE);
 357
 358         /*
 359          * Most of the registers are reset during power down or when HPD is low.
 360          */
 361         regcache_sync(adv7511->regmap);
 362
 363         if (adv7511->type == ADV7533)
 364                 adv7533_dsi_power_on(adv7511);
 365
 366         adv7511->powered = true;
 367 }
 368
 369 static void adv7511_power_off(struct adv7511 *adv7511)
 370 {
 371         /* TODO: setup additional power down modes */
 372         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 373                            ADV7511_POWER_POWER_DOWN,
 374                            ADV7511_POWER_POWER_DOWN);
 375         regcache_mark_dirty(adv7511->regmap);
 376
 377         if (adv7511->type == ADV7533)
 378                 adv7533_dsi_power_off(adv7511);
 379
 380         adv7511->powered = false;
 381 }
 382
 383 /* -----------------------------------------------------------------------------
 384  * Interrupt and hotplug detection
 385  */
 386
 387 static bool adv7511_hpd(struct adv7511 *adv7511)
 388 {
 389         unsigned int irq0;
 390         int ret;
 391
 392         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 393         if (ret < 0)
 394                 return false;
 395
 396         if (irq0 & ADV7511_INT0_HPD) {
 397                 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 398                              ADV7511_INT0_HPD);
 399                 return true;
 400         }
 401
 402         return false;
 403 }
 404
 405 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 406 {
 407         unsigned int irq0, irq1;
 408         int ret;
 409
 410         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 411         if (ret < 0)
 412                 return ret;
 413
 414         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
 415         if (ret < 0)
 416                 return ret;
 417
 418         regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 419         regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 420
 421         if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
 422                 drm_helper_hpd_irq_event(adv7511->connector.dev);
 423
 424         if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 425                 adv7511->edid_read = true;
 426
 427                 if (adv7511->i2c_main->irq)
 428                         wake_up_all(&adv7511->wq);
 429         }
 430
 431         return 0;
 432 }
 433
 434 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
 435 {
 436         struct adv7511 *adv7511 = devid;
 437         int ret;
 438
 439         ret = adv7511_irq_process(adv7511, true);
 440         return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
 441 }
 442
 443 /* -----------------------------------------------------------------------------
 444  * EDID retrieval
 445  */
 446
 447 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
 448 {
 449         int ret;
 450
 451         if (adv7511->i2c_main->irq) {
 452                 ret = wait_event_interruptible_timeout(adv7511->wq,
 453                                 adv7511->edid_read, msecs_to_jiffies(timeout));
 454         } else {
 455                 for (; timeout > 0; timeout -= 25) {
 456                         ret = adv7511_irq_process(adv7511, false);
 457                         if (ret < 0)
 458                                 break;
 459
 460                         if (adv7511->edid_read)
 461                                 break;
 462
 463                         msleep(25);
 464                 }
 465         }
 466
 467         return adv7511->edid_read ? 0 : -EIO;
 468 }
 469
 470 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
 471                                   size_t len)
 472 {
 473         struct adv7511 *adv7511 = data;
 474         struct i2c_msg xfer[2];
 475         uint8_t offset;
 476         unsigned int i;
 477         int ret;
 478
 479         if (len > 128)
 480                 return -EINVAL;
 481
 482         if (adv7511->current_edid_segment != block / 2) {
 483                 unsigned int status;
 484
 485                 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
 486                                   &status);
 487                 if (ret < 0)
 488                         return ret;
 489
 490                 if (status != 2) {
 491                         adv7511->edid_read = false;
 492                         regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
 493                                      block);
 494                         ret = adv7511_wait_for_edid(adv7511, 200);
 495                         if (ret < 0)
 496                                 return ret;
 497                 }
 498
 499                 /* Break this apart, hopefully more I2C controllers will
 500                  * support 64 byte transfers than 256 byte transfers
 501                  */
 502
 503                 xfer[0].addr = adv7511->i2c_edid->addr;
 504                 xfer[0].flags = 0;
 505                 xfer[0].len = 1;
 506                 xfer[0].buf = &offset;
 507                 xfer[1].addr = adv7511->i2c_edid->addr;
 508                 xfer[1].flags = I2C_M_RD;
 509                 xfer[1].len = 64;
 510                 xfer[1].buf = adv7511->edid_buf;
 511
 512                 offset = 0;
 513
 514                 for (i = 0; i < 4; ++i) {
 515                         ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
 516                                            ARRAY_SIZE(xfer));
 517                         if (ret < 0)
 518                                 return ret;
 519                         else if (ret != 2)
 520                                 return -EIO;
 521
 522                         xfer[1].buf += 64;
 523                         offset += 64;
 524                 }
 525
 526                 adv7511->current_edid_segment = block / 2;
 527         }
 528
 529         if (block % 2 == 0)
 530                 memcpy(buf, adv7511->edid_buf, len);
 531         else
 532                 memcpy(buf, adv7511->edid_buf + 128, len);
 533
 534         return 0;
 535 }
 536
 537 /* -----------------------------------------------------------------------------
 538  * ADV75xx helpers
 539  */
 540
 541 static int adv7511_get_modes(struct adv7511 *adv7511,
 542                              struct drm_connector *connector)
 543 {
 544         struct edid *edid;
 545         unsigned int count;
 546
 547         /* Reading the EDID only works if the device is powered */
 548         if (!adv7511->powered) {
 549                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 550                                    ADV7511_POWER_POWER_DOWN, 0);
 551                 if (adv7511->i2c_main->irq) {
 552                         regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 553                                      ADV7511_INT0_EDID_READY);
 554                         regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
 555                                      ADV7511_INT1_DDC_ERROR);
 556                 }
 557                 adv7511->current_edid_segment = -1;
 558         }
 559
 560         edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
 561
 562         if (!adv7511->powered)
 563                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 564                                    ADV7511_POWER_POWER_DOWN,
 565                                    ADV7511_POWER_POWER_DOWN);
 566
 567         kfree(adv7511->edid);
 568         adv7511->edid = edid;
 569         if (!edid)
 570                 return 0;
 571
 572         drm_mode_connector_update_edid_property(connector, edid);
 573         count = drm_add_edid_modes(connector, edid);
 574
 575         adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
 576
 577         return count;
 578 }
 579
 580 static enum drm_connector_status
 581 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
 582 {
 583         enum drm_connector_status status;
 584         unsigned int val;
 585         bool hpd;
 586         int ret;
 587
 588         ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 589         if (ret < 0)
 590                 return connector_status_disconnected;
 591
 592         if (val & ADV7511_STATUS_HPD)
 593                 status = connector_status_connected;
 594         else
 595                 status = connector_status_disconnected;
 596
 597         hpd = adv7511_hpd(adv7511);
 598
 599         /* The chip resets itself when the cable is disconnected, so in case
 600          * there is a pending HPD interrupt and the cable is connected there was
 601          * at least one transition from disconnected to connected and the chip
 602          * has to be reinitialized. */
 603         if (status == connector_status_connected && hpd && adv7511->powered) {
 604                 regcache_mark_dirty(adv7511->regmap);
 605                 adv7511_power_on(adv7511);
 606                 adv7511_get_modes(adv7511, connector);
 607                 if (adv7511->status == connector_status_connected)
 608                         status = connector_status_disconnected;
 609         } else {
 610                 /* Renable HPD sensing */
 611                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 612                                    ADV7511_REG_POWER2_HPD_SRC_MASK,
 613                                    ADV7511_REG_POWER2_HPD_SRC_BOTH);
 614         }
 615
 616         adv7511->status = status;
 617         return status;
 618 }
 619
 620 static int adv7511_mode_valid(struct adv7511 *adv7511,
 621                               struct drm_display_mode *mode)
 622 {
 623         if (mode->clock > 165000)
 624                 return MODE_CLOCK_HIGH;
 625
 626         return MODE_OK;
 627 }
 628
 629 static void adv7511_mode_set(struct adv7511 *adv7511,
 630                              struct drm_display_mode *mode,
 631                              struct drm_display_mode *adj_mode)
 632 {
 633         unsigned int low_refresh_rate;
 634         unsigned int hsync_polarity = 0;
 635         unsigned int vsync_polarity = 0;
 636
 637         if (adv7511->embedded_sync) {
 638                 unsigned int hsync_offset, hsync_len;
 639                 unsigned int vsync_offset, vsync_len;
 640
 641                 hsync_offset = adj_mode->crtc_hsync_start -
 642                                adj_mode->crtc_hdisplay;
 643                 vsync_offset = adj_mode->crtc_vsync_start -
 644                                adj_mode->crtc_vdisplay;
 645                 hsync_len = adj_mode->crtc_hsync_end -
 646                             adj_mode->crtc_hsync_start;
 647                 vsync_len = adj_mode->crtc_vsync_end -
 648                             adj_mode->crtc_vsync_start;
 649
 650                 /* The hardware vsync generator has a off-by-one bug */
 651                 vsync_offset += 1;
 652
 653                 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
 654                              ((hsync_offset >> 10) & 0x7) << 5);
 655                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
 656                              (hsync_offset >> 2) & 0xff);
 657                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
 658                              ((hsync_offset & 0x3) << 6) |
 659                              ((hsync_len >> 4) & 0x3f));
 660                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
 661                              ((hsync_len & 0xf) << 4) |
 662                              ((vsync_offset >> 6) & 0xf));
 663                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
 664                              ((vsync_offset & 0x3f) << 2) |
 665                              ((vsync_len >> 8) & 0x3));
 666                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
 667                              vsync_len & 0xff);
 668
 669                 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
 670                 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
 671         } else {
 672                 enum adv7511_sync_polarity mode_hsync_polarity;
 673                 enum adv7511_sync_polarity mode_vsync_polarity;
 674
 675                 /**
 676                  * If the input signal is always low or always high we want to
 677                  * invert or let it passthrough depending on the polarity of the
 678                  * current mode.
 679                  **/
 680                 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
 681                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 682                 else
 683                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 684
 685                 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
 686                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 687                 else
 688                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 689
 690                 if (adv7511->hsync_polarity != mode_hsync_polarity &&
 691                     adv7511->hsync_polarity !=
 692                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 693                         hsync_polarity = 1;
 694
 695                 if (adv7511->vsync_polarity != mode_vsync_polarity &&
 696                     adv7511->vsync_polarity !=
 697                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 698                         vsync_polarity = 1;
 699         }
 700
 701         if (mode->vrefresh <= 24000)
 702                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
 703         else if (mode->vrefresh <= 25000)
 704                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
 705         else if (mode->vrefresh <= 30000)
 706                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
 707         else
 708                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 709
 710         regmap_update_bits(adv7511->regmap, 0xfb,
 711                 0x6, low_refresh_rate << 1);
 712         regmap_update_bits(adv7511->regmap, 0x17,
 713                 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 714
 715         if (adv7511->type == ADV7533)
 716                 adv7533_mode_set(adv7511, adj_mode);
 717
 718         drm_mode_copy(&adv7511->curr_mode, adj_mode);
 719
 720         /*
 721          * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 722          * supposed to give better results.
 723          */
 724
 725         adv7511->f_tmds = mode->clock;
 726 }
 727
 728 /* Connector funcs */
 729 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
 730 {
 731         return container_of(connector, struct adv7511, connector);
 732 }
 733
 734 static int adv7511_connector_get_modes(struct drm_connector *connector)
 735 {
 736         struct adv7511 *adv = connector_to_adv7511(connector);
 737
 738         return adv7511_get_modes(adv, connector);
 739 }
 740
 741 static enum drm_mode_status
 742 adv7511_connector_mode_valid(struct drm_connector *connector,
 743                              struct drm_display_mode *mode)
 744 {
 745         struct adv7511 *adv = connector_to_adv7511(connector);
 746
 747         return adv7511_mode_valid(adv, mode);
 748 }
 749
 750 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
 751         .get_modes = adv7511_connector_get_modes,
 752         .mode_valid = adv7511_connector_mode_valid,
 753 };
 754
 755 static enum drm_connector_status
 756 adv7511_connector_detect(struct drm_connector *connector, bool force)
 757 {
 758         struct adv7511 *adv = connector_to_adv7511(connector);
 759
 760         return adv7511_detect(adv, connector);
 761 }
 762
 763 static struct drm_connector_funcs adv7511_connector_funcs = {
 764         .dpms = drm_atomic_helper_connector_dpms,
 765         .fill_modes = drm_helper_probe_single_connector_modes,
 766         .detect = adv7511_connector_detect,
 767         .destroy = drm_connector_cleanup,
 768         .reset = drm_atomic_helper_connector_reset,
 769         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 770         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 771 };
 772
 773 /* Bridge funcs */
 774 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
 775 {
 776         return container_of(bridge, struct adv7511, bridge);
 777 }
 778
 779 static void adv7511_bridge_enable(struct drm_bridge *bridge)
 780 {
 781         struct adv7511 *adv = bridge_to_adv7511(bridge);
 782
 783         adv7511_power_on(adv);
 784 }
 785
 786 static void adv7511_bridge_disable(struct drm_bridge *bridge)
 787 {
 788         struct adv7511 *adv = bridge_to_adv7511(bridge);
 789
 790         adv7511_power_off(adv);
 791 }
 792
 793 static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
 794                                     struct drm_display_mode *mode,
 795                                     struct drm_display_mode *adj_mode)
 796 {
 797         struct adv7511 *adv = bridge_to_adv7511(bridge);
 798
 799         adv7511_mode_set(adv, mode, adj_mode);
 800 }
 801
 802 static int adv7511_bridge_attach(struct drm_bridge *bridge)
 803 {
 804         struct adv7511 *adv = bridge_to_adv7511(bridge);
 805         int ret;
 806
 807         if (!bridge->encoder) {
 808                 DRM_ERROR("Parent encoder object not found");
 809                 return -ENODEV;
 810         }
 811
 812         adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
 813
 814         ret = drm_connector_init(bridge->dev, &adv->connector,
 815                                  &adv7511_connector_funcs,
 816                                  DRM_MODE_CONNECTOR_HDMIA);
 817         if (ret) {
 818                 DRM_ERROR("Failed to initialize connector with drm\n");
 819                 return ret;
 820         }
 821         drm_connector_helper_add(&adv->connector,
 822                                  &adv7511_connector_helper_funcs);
 823         drm_mode_connector_attach_encoder(&adv->connector, bridge->encoder);
 824
 825         if (adv->type == ADV7533)
 826                 ret = adv7533_attach_dsi(adv);
 827
 828         return ret;
 829 }
 830
 831 static struct drm_bridge_funcs adv7511_bridge_funcs = {
 832         .enable = adv7511_bridge_enable,
 833         .disable = adv7511_bridge_disable,
 834         .mode_set = adv7511_bridge_mode_set,
 835         .attach = adv7511_bridge_attach,
 836 };
 837
 838 /* -----------------------------------------------------------------------------
 839  * Probe & remove
 840  */
 841
 842 static int adv7511_parse_dt(struct device_node *np,
 843                             struct adv7511_link_config *config)
 844 {
 845         const char *str;
 846         int ret;
 847
 848         of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
 849         if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
 850             config->input_color_depth != 12)
 851                 return -EINVAL;
 852
 853         ret = of_property_read_string(np, "adi,input-colorspace", &str);
 854         if (ret < 0)
 855                 return ret;
 856
 857         if (!strcmp(str, "rgb"))
 858                 config->input_colorspace = HDMI_COLORSPACE_RGB;
 859         else if (!strcmp(str, "yuv422"))
 860                 config->input_colorspace = HDMI_COLORSPACE_YUV422;
 861         else if (!strcmp(str, "yuv444"))
 862                 config->input_colorspace = HDMI_COLORSPACE_YUV444;
 863         else
 864                 return -EINVAL;
 865
 866         ret = of_property_read_string(np, "adi,input-clock", &str);
 867         if (ret < 0)
 868                 return ret;
 869
 870         if (!strcmp(str, "1x"))
 871                 config->input_clock = ADV7511_INPUT_CLOCK_1X;
 872         else if (!strcmp(str, "2x"))
 873                 config->input_clock = ADV7511_INPUT_CLOCK_2X;
 874         else if (!strcmp(str, "ddr"))
 875                 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
 876         else
 877                 return -EINVAL;
 878
 879         if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
 880             config->input_clock != ADV7511_INPUT_CLOCK_1X) {
 881                 ret = of_property_read_u32(np, "adi,input-style",
 882                                            &config->input_style);
 883                 if (ret)
 884                         return ret;
 885
 886                 if (config->input_style < 1 || config->input_style > 3)
 887                         return -EINVAL;
 888
 889                 ret = of_property_read_string(np, "adi,input-justification",
 890                                               &str);
 891                 if (ret < 0)
 892                         return ret;
 893
 894                 if (!strcmp(str, "left"))
 895                         config->input_justification =
 896                                 ADV7511_INPUT_JUSTIFICATION_LEFT;
 897                 else if (!strcmp(str, "evenly"))
 898                         config->input_justification =
 899                                 ADV7511_INPUT_JUSTIFICATION_EVENLY;
 900                 else if (!strcmp(str, "right"))
 901                         config->input_justification =
 902                                 ADV7511_INPUT_JUSTIFICATION_RIGHT;
 903                 else
 904                         return -EINVAL;
 905
 906         } else {
 907                 config->input_style = 1;
 908                 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
 909         }
 910
 911         of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
 912         if (config->clock_delay < -1200 || config->clock_delay > 1600)
 913                 return -EINVAL;
 914
 915         config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
 916
 917         /* Hardcode the sync pulse configurations for now. */
 918         config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
 919         config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 920         config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 921
 922         return 0;
 923 }
 924
 925 static const int edid_i2c_addr = 0x7e;
 926 static const int packet_i2c_addr = 0x70;
 927 static const int cec_i2c_addr = 0x78;
 928
 929 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 930 {
 931         struct adv7511_link_config link_config;
 932         struct adv7511 *adv7511;
 933         struct device *dev = &i2c->dev;
 934         unsigned int val;
 935         int ret;
 936
 937         if (!dev->of_node)
 938                 return -EINVAL;
 939
 940         adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
 941         if (!adv7511)
 942                 return -ENOMEM;
 943
 944         adv7511->powered = false;
 945         adv7511->status = connector_status_disconnected;
 946
 947         if (dev->of_node)
 948                 adv7511->type = (enum adv7511_type)of_device_get_match_data(dev);
 949         else
 950                 adv7511->type = id->driver_data;
 951
 952         memset(&link_config, 0, sizeof(link_config));
 953
 954         if (adv7511->type == ADV7511)
 955                 ret = adv7511_parse_dt(dev->of_node, &link_config);
 956         else
 957                 ret = adv7533_parse_dt(dev->of_node, adv7511);
 958         if (ret)
 959                 return ret;
 960
 961         /*
 962          * The power down GPIO is optional. If present, toggle it from active to
 963          * inactive to wake up the encoder.
 964          */
 965         adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
 966         if (IS_ERR(adv7511->gpio_pd))
 967                 return PTR_ERR(adv7511->gpio_pd);
 968
 969         if (adv7511->gpio_pd) {
 970                 mdelay(5);
 971                 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
 972         }
 973
 974         adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
 975         if (IS_ERR(adv7511->regmap))
 976                 return PTR_ERR(adv7511->regmap);
 977
 978         ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
 979         if (ret)
 980                 return ret;
 981         dev_dbg(dev, "Rev. %d\n", val);
 982
 983         if (adv7511->type == ADV7511)
 984                 ret = regmap_register_patch(adv7511->regmap,
 985                                             adv7511_fixed_registers,
 986                                             ARRAY_SIZE(adv7511_fixed_registers));
 987         else
 988                 ret = adv7533_patch_registers(adv7511);
 989         if (ret)
 990                 return ret;
 991
 992         regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
 993         regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
 994                      packet_i2c_addr);
 995         regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr);
 996         adv7511_packet_disable(adv7511, 0xffff);
 997
 998         adv7511->i2c_main = i2c;
 999         adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
1000         if (!adv7511->i2c_edid)
1001                 return -ENOMEM;
1002
1003         if (adv7511->type == ADV7533) {
1004                 ret = adv7533_init_cec(adv7511);
1005                 if (ret)
1006                         goto err_i2c_unregister_edid;
1007         }
1008
1009         if (i2c->irq) {
1010                 init_waitqueue_head(&adv7511->wq);
1011
1012                 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
1013                                                 adv7511_irq_handler,
1014                                                 IRQF_ONESHOT, dev_name(dev),
1015                                                 adv7511);
1016                 if (ret)
1017                         goto err_unregister_cec;
1018         }
1019
1020         /* CEC is unused for now */
1021         regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
1022                      ADV7511_CEC_CTRL_POWER_DOWN);
1023
1024         adv7511_power_off(adv7511);
1025
1026         i2c_set_clientdata(i2c, adv7511);
1027
1028         if (adv7511->type == ADV7511)
1029                 adv7511_set_link_config(adv7511, &link_config);
1030
1031         adv7511->bridge.funcs = &adv7511_bridge_funcs;
1032         adv7511->bridge.of_node = dev->of_node;
1033
1034         ret = drm_bridge_add(&adv7511->bridge);
1035         if (ret) {
1036                 dev_err(dev, "failed to add adv7511 bridge\n");
1037                 goto err_unregister_cec;
1038         }
1039
1040         return 0;
1041
1042 err_unregister_cec:
1043         adv7533_uninit_cec(adv7511);
1044 err_i2c_unregister_edid:
1045         i2c_unregister_device(adv7511->i2c_edid);
1046
1047         return ret;
1048 }
1049
1050 static int adv7511_remove(struct i2c_client *i2c)
1051 {
1052         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1053
1054         if (adv7511->type == ADV7533) {
1055                 adv7533_detach_dsi(adv7511);
1056                 adv7533_uninit_cec(adv7511);
1057         }
1058
1059         drm_bridge_remove(&adv7511->bridge);
1060
1061         i2c_unregister_device(adv7511->i2c_edid);
1062
1063         kfree(adv7511->edid);
1064
1065         return 0;
1066 }
1067
1068 static const struct i2c_device_id adv7511_i2c_ids[] = {
1069         { "adv7511", ADV7511 },
1070         { "adv7511w", ADV7511 },
1071         { "adv7513", ADV7511 },
1072 #ifdef CONFIG_DRM_I2C_ADV7533
1073         { "adv7533", ADV7533 },
1074 #endif
1075         { }
1076 };
1077 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
1078
1079 static const struct of_device_id adv7511_of_ids[] = {
1080         { .compatible = "adi,adv7511", .data = (void *)ADV7511 },
1081         { .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
1082         { .compatible = "adi,adv7513", .data = (void *)ADV7511 },
1083 #ifdef CONFIG_DRM_I2C_ADV7533
1084         { .compatible = "adi,adv7533", .data = (void *)ADV7533 },
1085 #endif
1086         { }
1087 };
1088 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
1089
1090 static struct mipi_dsi_driver adv7533_dsi_driver = {
1091         .driver.name = "adv7533",
1092 };
1093
1094 static struct i2c_driver adv7511_driver = {
1095         .driver = {
1096                 .name = "adv7511",
1097                 .of_match_table = adv7511_of_ids,
1098         },
1099         .id_table = adv7511_i2c_ids,
1100         .probe = adv7511_probe,
1101         .remove = adv7511_remove,
1102 };
1103
1104 static int __init adv7511_init(void)
1105 {
1106         if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1107                 mipi_dsi_driver_register(&adv7533_dsi_driver);
1108
1109         return i2c_add_driver(&adv7511_driver);
1110 }
1111 module_init(adv7511_init);
1112
1113 static void __exit adv7511_exit(void)
1114 {
1115         i2c_del_driver(&adv7511_driver);
1116
1117         if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1118                 mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1119 }
1120 module_exit(adv7511_exit);
1121
1122 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1123 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1124 MODULE_LICENSE("GPL");