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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Analog Devices ADV7511 HDMI transmitter driver
   4  *
   5  * Copyright 2012 Analog Devices Inc.
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/device.h>
  10 #include <linux/gpio/consumer.h>
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/slab.h>
  14
  15 #include <media/cec.h>
  16
  17 #include <drm/drm_atomic.h>
  18 #include <drm/drm_atomic_helper.h>
  19 #include <drm/drm_edid.h>
  20 #include <drm/drm_print.h>
  21 #include <drm/drm_probe_helper.h>
  22
  23 #include "adv7511.h"
  24
  25 /* ADI recommended values for proper operation. */
  26 static const struct reg_sequence adv7511_fixed_registers[] = {
  27         { 0x98, 0x03 },
  28         { 0x9a, 0xe0 },
  29         { 0x9c, 0x30 },
  30         { 0x9d, 0x61 },
  31         { 0xa2, 0xa4 },
  32         { 0xa3, 0xa4 },
  33         { 0xe0, 0xd0 },
  34         { 0xf9, 0x00 },
  35         { 0x55, 0x02 },
  36 };
  37
  38 /* -----------------------------------------------------------------------------
  39  * Register access
  40  */
  41
  42 static const uint8_t adv7511_register_defaults[] = {
  43         0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
  44         0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
  45         0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
  46         0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
  47         0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
  48         0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
  49         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
  50         0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
  51         0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
  52         0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
  53         0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
  54         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  55         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
  56         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  57         0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
  58         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  59         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
  60         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  61         0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
  62         0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
  63         0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
  64         0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
  65         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
  66         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  67         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
  68         0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
  69         0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
  70         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
  71         0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
  72         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  73         0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
  74         0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  75 };
  76
  77 static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
  78 {
  79         switch (reg) {
  80         case ADV7511_REG_CHIP_REVISION:
  81         case ADV7511_REG_SPDIF_FREQ:
  82         case ADV7511_REG_CTS_AUTOMATIC1:
  83         case ADV7511_REG_CTS_AUTOMATIC2:
  84         case ADV7511_REG_VIC_DETECTED:
  85         case ADV7511_REG_VIC_SEND:
  86         case ADV7511_REG_AUX_VIC_DETECTED:
  87         case ADV7511_REG_STATUS:
  88         case ADV7511_REG_GC(1):
  89         case ADV7511_REG_INT(0):
  90         case ADV7511_REG_INT(1):
  91         case ADV7511_REG_PLL_STATUS:
  92         case ADV7511_REG_AN(0):
  93         case ADV7511_REG_AN(1):
  94         case ADV7511_REG_AN(2):
  95         case ADV7511_REG_AN(3):
  96         case ADV7511_REG_AN(4):
  97         case ADV7511_REG_AN(5):
  98         case ADV7511_REG_AN(6):
  99         case ADV7511_REG_AN(7):
 100         case ADV7511_REG_HDCP_STATUS:
 101         case ADV7511_REG_BCAPS:
 102         case ADV7511_REG_BKSV(0):
 103         case ADV7511_REG_BKSV(1):
 104         case ADV7511_REG_BKSV(2):
 105         case ADV7511_REG_BKSV(3):
 106         case ADV7511_REG_BKSV(4):
 107         case ADV7511_REG_DDC_STATUS:
 108         case ADV7511_REG_EDID_READ_CTRL:
 109         case ADV7511_REG_BSTATUS(0):
 110         case ADV7511_REG_BSTATUS(1):
 111         case ADV7511_REG_CHIP_ID_HIGH:
 112         case ADV7511_REG_CHIP_ID_LOW:
 113                 return true;
 114         }
 115
 116         return false;
 117 }
 118
 119 static const struct regmap_config adv7511_regmap_config = {
 120         .reg_bits = 8,
 121         .val_bits = 8,
 122
 123         .max_register = 0xff,
 124         .cache_type = REGCACHE_MAPLE,
 125         .reg_defaults_raw = adv7511_register_defaults,
 126         .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
 127
 128         .volatile_reg = adv7511_register_volatile,
 129 };
 130
 131 /* -----------------------------------------------------------------------------
 132  * Hardware configuration
 133  */
 134
 135 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
 136                                  const uint16_t *coeff,
 137                                  unsigned int scaling_factor)
 138 {
 139         unsigned int i;
 140
 141         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 142                            ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
 143
 144         if (enable) {
 145                 for (i = 0; i < 12; ++i) {
 146                         regmap_update_bits(adv7511->regmap,
 147                                            ADV7511_REG_CSC_UPPER(i),
 148                                            0x1f, coeff[i] >> 8);
 149                         regmap_write(adv7511->regmap,
 150                                      ADV7511_REG_CSC_LOWER(i),
 151                                      coeff[i] & 0xff);
 152                 }
 153         }
 154
 155         if (enable)
 156                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 157                                    0xe0, 0x80 | (scaling_factor << 5));
 158         else
 159                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 160                                    0x80, 0x00);
 161
 162         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 163                            ADV7511_CSC_UPDATE_MODE, 0);
 164 }
 165
 166 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 167 {
 168         if (packet & 0xff)
 169                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 170                                    packet, 0xff);
 171
 172         if (packet & 0xff00) {
 173                 packet >>= 8;
 174                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 175                                    packet, 0xff);
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
 182 {
 183         if (packet & 0xff)
 184                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 185                                    packet, 0x00);
 186
 187         if (packet & 0xff00) {
 188                 packet >>= 8;
 189                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 190                                    packet, 0x00);
 191         }
 192
 193         return 0;
 194 }
 195
 196 /* Coefficients for adv7511 color space conversion */
 197 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
 198         0x0734, 0x04ad, 0x0000, 0x1c1b,
 199         0x1ddc, 0x04ad, 0x1f24, 0x0135,
 200         0x0000, 0x04ad, 0x087c, 0x1b77,
 201 };
 202
 203 static void adv7511_set_config_csc(struct adv7511 *adv7511,
 204                                    struct drm_connector *connector,
 205                                    bool rgb, bool hdmi_mode)
 206 {
 207         struct adv7511_video_config config;
 208         bool output_format_422, output_format_ycbcr;
 209         unsigned int mode;
 210         uint8_t infoframe[17];
 211
 212         config.hdmi_mode = hdmi_mode;
 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_YCBCR422) &&
 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 | ADV7511_INT0_HPD);
 342                 regmap_update_bits(adv7511->regmap,
 343                                    ADV7511_REG_INT_ENABLE(1),
 344                                    ADV7511_INT1_DDC_ERROR,
 345                                    ADV7511_INT1_DDC_ERROR);
 346         }
 347
 348         /*
 349          * Per spec it is allowed to pulse the HPD signal to indicate that the
 350          * EDID information has changed. Some monitors do this when they wakeup
 351          * from standby or are enabled. When the HPD goes low the adv7511 is
 352          * reset and the outputs are disabled which might cause the monitor to
 353          * go to standby again. To avoid this we ignore the HPD pin for the
 354          * first few seconds after enabling the output. On the other hand
 355          * adv7535 require to enable HPD Override bit for proper HPD.
 356          */
 357         if (adv7511->info->hpd_override_enable)
 358                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 359                                    ADV7535_REG_POWER2_HPD_OVERRIDE,
 360                                    ADV7535_REG_POWER2_HPD_OVERRIDE);
 361         else
 362                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 363                                    ADV7511_REG_POWER2_HPD_SRC_MASK,
 364                                    ADV7511_REG_POWER2_HPD_SRC_NONE);
 365 }
 366
 367 static void adv7511_power_on(struct adv7511 *adv7511)
 368 {
 369         __adv7511_power_on(adv7511);
 370
 371         /*
 372          * Most of the registers are reset during power down or when HPD is low.
 373          */
 374         regcache_sync(adv7511->regmap);
 375
 376         if (adv7511->info->has_dsi)
 377                 adv7533_dsi_power_on(adv7511);
 378         adv7511->powered = true;
 379 }
 380
 381 static void __adv7511_power_off(struct adv7511 *adv7511)
 382 {
 383         /* TODO: setup additional power down modes */
 384         if (adv7511->info->hpd_override_enable)
 385                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 386                                    ADV7535_REG_POWER2_HPD_OVERRIDE, 0);
 387
 388         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 389                            ADV7511_POWER_POWER_DOWN,
 390                            ADV7511_POWER_POWER_DOWN);
 391         regmap_update_bits(adv7511->regmap,
 392                            ADV7511_REG_INT_ENABLE(1),
 393                            ADV7511_INT1_DDC_ERROR, 0);
 394         regcache_mark_dirty(adv7511->regmap);
 395 }
 396
 397 static void adv7511_power_off(struct adv7511 *adv7511)
 398 {
 399         __adv7511_power_off(adv7511);
 400         if (adv7511->info->has_dsi)
 401                 adv7533_dsi_power_off(adv7511);
 402         adv7511->powered = false;
 403 }
 404
 405 /* -----------------------------------------------------------------------------
 406  * Interrupt and hotplug detection
 407  */
 408
 409 static bool adv7511_hpd(struct adv7511 *adv7511)
 410 {
 411         unsigned int irq0;
 412         int ret;
 413
 414         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 415         if (ret < 0)
 416                 return false;
 417
 418         if (irq0 & ADV7511_INT0_HPD) {
 419                 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 420                              ADV7511_INT0_HPD);
 421                 return true;
 422         }
 423
 424         return false;
 425 }
 426
 427 static void adv7511_hpd_work(struct work_struct *work)
 428 {
 429         struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work);
 430         enum drm_connector_status status;
 431         unsigned int val;
 432         int ret;
 433
 434         ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 435         if (ret < 0)
 436                 status = connector_status_disconnected;
 437         else if (val & ADV7511_STATUS_HPD)
 438                 status = connector_status_connected;
 439         else
 440                 status = connector_status_disconnected;
 441
 442         /*
 443          * The bridge resets its registers on unplug. So when we get a plug
 444          * event and we're already supposed to be powered, cycle the bridge to
 445          * restore its state.
 446          */
 447         if (status == connector_status_connected &&
 448             adv7511->connector.status == connector_status_disconnected &&
 449             adv7511->powered) {
 450                 regcache_mark_dirty(adv7511->regmap);
 451                 adv7511_power_on(adv7511);
 452         }
 453
 454         if (adv7511->connector.status != status) {
 455                 adv7511->connector.status = status;
 456
 457                 if (adv7511->connector.dev) {
 458                         if (status == connector_status_disconnected)
 459                                 cec_phys_addr_invalidate(adv7511->cec_adap);
 460                         drm_kms_helper_hotplug_event(adv7511->connector.dev);
 461                 } else {
 462                         drm_bridge_hpd_notify(&adv7511->bridge, status);
 463                 }
 464         }
 465 }
 466
 467 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 468 {
 469         unsigned int irq0, irq1;
 470         int ret;
 471
 472         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 473         if (ret < 0)
 474                 return ret;
 475
 476         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
 477         if (ret < 0)
 478                 return ret;
 479
 480         regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 481         regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 482
 483         if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
 484                 schedule_work(&adv7511->hpd_work);
 485
 486         if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 487                 adv7511->edid_read = true;
 488
 489                 if (adv7511->i2c_main->irq)
 490                         wake_up_all(&adv7511->wq);
 491         }
 492
 493 #ifdef CONFIG_DRM_I2C_ADV7511_CEC
 494         adv7511_cec_irq_process(adv7511, irq1);
 495 #endif
 496
 497         return 0;
 498 }
 499
 500 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
 501 {
 502         struct adv7511 *adv7511 = devid;
 503         int ret;
 504
 505         ret = adv7511_irq_process(adv7511, true);
 506         return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
 507 }
 508
 509 /* -----------------------------------------------------------------------------
 510  * EDID retrieval
 511  */
 512
 513 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
 514 {
 515         int ret;
 516
 517         if (adv7511->i2c_main->irq) {
 518                 ret = wait_event_interruptible_timeout(adv7511->wq,
 519                                 adv7511->edid_read, msecs_to_jiffies(timeout));
 520         } else {
 521                 for (; timeout > 0; timeout -= 25) {
 522                         ret = adv7511_irq_process(adv7511, false);
 523                         if (ret < 0)
 524                                 break;
 525
 526                         if (adv7511->edid_read)
 527                                 break;
 528
 529                         msleep(25);
 530                 }
 531         }
 532
 533         return adv7511->edid_read ? 0 : -EIO;
 534 }
 535
 536 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
 537                                   size_t len)
 538 {
 539         struct adv7511 *adv7511 = data;
 540         struct i2c_msg xfer[2];
 541         uint8_t offset;
 542         unsigned int i;
 543         int ret;
 544
 545         if (len > 128)
 546                 return -EINVAL;
 547
 548         if (adv7511->current_edid_segment != block / 2) {
 549                 unsigned int status;
 550
 551                 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
 552                                   &status);
 553                 if (ret < 0)
 554                         return ret;
 555
 556                 if (status != 2) {
 557                         adv7511->edid_read = false;
 558                         regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
 559                                      block);
 560                         ret = adv7511_wait_for_edid(adv7511, 200);
 561                         if (ret < 0)
 562                                 return ret;
 563                 }
 564
 565                 /* Break this apart, hopefully more I2C controllers will
 566                  * support 64 byte transfers than 256 byte transfers
 567                  */
 568
 569                 xfer[0].addr = adv7511->i2c_edid->addr;
 570                 xfer[0].flags = 0;
 571                 xfer[0].len = 1;
 572                 xfer[0].buf = &offset;
 573                 xfer[1].addr = adv7511->i2c_edid->addr;
 574                 xfer[1].flags = I2C_M_RD;
 575                 xfer[1].len = 64;
 576                 xfer[1].buf = adv7511->edid_buf;
 577
 578                 offset = 0;
 579
 580                 for (i = 0; i < 4; ++i) {
 581                         ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
 582                                            ARRAY_SIZE(xfer));
 583                         if (ret < 0)
 584                                 return ret;
 585                         else if (ret != 2)
 586                                 return -EIO;
 587
 588                         xfer[1].buf += 64;
 589                         offset += 64;
 590                 }
 591
 592                 adv7511->current_edid_segment = block / 2;
 593         }
 594
 595         if (block % 2 == 0)
 596                 memcpy(buf, adv7511->edid_buf, len);
 597         else
 598                 memcpy(buf, adv7511->edid_buf + 128, len);
 599
 600         return 0;
 601 }
 602
 603 /* -----------------------------------------------------------------------------
 604  * ADV75xx helpers
 605  */
 606
 607 static const struct drm_edid *adv7511_edid_read(struct adv7511 *adv7511,
 608                                                 struct drm_connector *connector)
 609 {
 610         const struct drm_edid *drm_edid;
 611
 612         /* Reading the EDID only works if the device is powered */
 613         if (!adv7511->powered) {
 614                 unsigned int edid_i2c_addr =
 615                                         (adv7511->i2c_edid->addr << 1);
 616
 617                 __adv7511_power_on(adv7511);
 618
 619                 /* Reset the EDID_I2C_ADDR register as it might be cleared */
 620                 regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
 621                              edid_i2c_addr);
 622         }
 623
 624         drm_edid = drm_edid_read_custom(connector, adv7511_get_edid_block, adv7511);
 625
 626         if (!adv7511->powered)
 627                 __adv7511_power_off(adv7511);
 628
 629         if (drm_edid) {
 630                 /*
 631                  * FIXME: The CEC physical address should be set using
 632                  * cec_s_phys_addr(adap,
 633                  * connector->display_info.source_physical_address, false) from
 634                  * a path that has read the EDID and called
 635                  * drm_edid_connector_update().
 636                  */
 637                 const struct edid *edid = drm_edid_raw(drm_edid);
 638
 639                 adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
 640                                        drm_detect_hdmi_monitor(edid));
 641
 642                 cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
 643         } else {
 644                 cec_s_phys_addr_from_edid(adv7511->cec_adap, NULL);
 645         }
 646
 647         return drm_edid;
 648 }
 649
 650 static int adv7511_get_modes(struct adv7511 *adv7511,
 651                              struct drm_connector *connector)
 652 {
 653         const struct drm_edid *drm_edid;
 654         unsigned int count;
 655
 656         drm_edid = adv7511_edid_read(adv7511, connector);
 657
 658         drm_edid_connector_update(connector, drm_edid);
 659         count = drm_edid_connector_add_modes(connector);
 660
 661         drm_edid_free(drm_edid);
 662
 663         return count;
 664 }
 665
 666 static enum drm_connector_status
 667 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
 668 {
 669         enum drm_connector_status status;
 670         unsigned int val;
 671         bool hpd;
 672         int ret;
 673
 674         ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 675         if (ret < 0)
 676                 return connector_status_disconnected;
 677
 678         if (val & ADV7511_STATUS_HPD)
 679                 status = connector_status_connected;
 680         else
 681                 status = connector_status_disconnected;
 682
 683         hpd = adv7511_hpd(adv7511);
 684
 685         /* The chip resets itself when the cable is disconnected, so in case
 686          * there is a pending HPD interrupt and the cable is connected there was
 687          * at least one transition from disconnected to connected and the chip
 688          * has to be reinitialized. */
 689         if (status == connector_status_connected && hpd && adv7511->powered) {
 690                 regcache_mark_dirty(adv7511->regmap);
 691                 adv7511_power_on(adv7511);
 692                 if (connector)
 693                         adv7511_get_modes(adv7511, connector);
 694                 if (adv7511->status == connector_status_connected)
 695                         status = connector_status_disconnected;
 696         } else {
 697                 /* Renable HPD sensing */
 698                 if (adv7511->info->hpd_override_enable)
 699                         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 700                                            ADV7535_REG_POWER2_HPD_OVERRIDE,
 701                                            ADV7535_REG_POWER2_HPD_OVERRIDE);
 702                 else
 703                         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 704                                            ADV7511_REG_POWER2_HPD_SRC_MASK,
 705                                            ADV7511_REG_POWER2_HPD_SRC_BOTH);
 706         }
 707
 708         adv7511->status = status;
 709         return status;
 710 }
 711
 712 static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511,
 713                               const struct drm_display_mode *mode)
 714 {
 715         if (mode->clock > 165000)
 716                 return MODE_CLOCK_HIGH;
 717
 718         return MODE_OK;
 719 }
 720
 721 static void adv7511_mode_set(struct adv7511 *adv7511,
 722                              const struct drm_display_mode *mode,
 723                              const struct drm_display_mode *adj_mode)
 724 {
 725         unsigned int low_refresh_rate;
 726         unsigned int hsync_polarity = 0;
 727         unsigned int vsync_polarity = 0;
 728
 729         if (adv7511->embedded_sync) {
 730                 unsigned int hsync_offset, hsync_len;
 731                 unsigned int vsync_offset, vsync_len;
 732
 733                 hsync_offset = adj_mode->crtc_hsync_start -
 734                                adj_mode->crtc_hdisplay;
 735                 vsync_offset = adj_mode->crtc_vsync_start -
 736                                adj_mode->crtc_vdisplay;
 737                 hsync_len = adj_mode->crtc_hsync_end -
 738                             adj_mode->crtc_hsync_start;
 739                 vsync_len = adj_mode->crtc_vsync_end -
 740                             adj_mode->crtc_vsync_start;
 741
 742                 /* The hardware vsync generator has a off-by-one bug */
 743                 vsync_offset += 1;
 744
 745                 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
 746                              ((hsync_offset >> 10) & 0x7) << 5);
 747                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
 748                              (hsync_offset >> 2) & 0xff);
 749                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
 750                              ((hsync_offset & 0x3) << 6) |
 751                              ((hsync_len >> 4) & 0x3f));
 752                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
 753                              ((hsync_len & 0xf) << 4) |
 754                              ((vsync_offset >> 6) & 0xf));
 755                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
 756                              ((vsync_offset & 0x3f) << 2) |
 757                              ((vsync_len >> 8) & 0x3));
 758                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
 759                              vsync_len & 0xff);
 760
 761                 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
 762                 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
 763         } else {
 764                 enum adv7511_sync_polarity mode_hsync_polarity;
 765                 enum adv7511_sync_polarity mode_vsync_polarity;
 766
 767                 /**
 768                  * If the input signal is always low or always high we want to
 769                  * invert or let it passthrough depending on the polarity of the
 770                  * current mode.
 771                  **/
 772                 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
 773                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 774                 else
 775                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 776
 777                 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
 778                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 779                 else
 780                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 781
 782                 if (adv7511->hsync_polarity != mode_hsync_polarity &&
 783                     adv7511->hsync_polarity !=
 784                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 785                         hsync_polarity = 1;
 786
 787                 if (adv7511->vsync_polarity != mode_vsync_polarity &&
 788                     adv7511->vsync_polarity !=
 789                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 790                         vsync_polarity = 1;
 791         }
 792
 793         if (drm_mode_vrefresh(mode) <= 24)
 794                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
 795         else if (drm_mode_vrefresh(mode) <= 25)
 796                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
 797         else if (drm_mode_vrefresh(mode) <= 30)
 798                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
 799         else
 800                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 801
 802         if (adv7511->info->type == ADV7511)
 803                 regmap_update_bits(adv7511->regmap, 0xfb,
 804                                    0x6, low_refresh_rate << 1);
 805         else
 806                 regmap_update_bits(adv7511->regmap, 0x4a,
 807                                    0xc, low_refresh_rate << 2);
 808
 809         regmap_update_bits(adv7511->regmap, 0x17,
 810                 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 811
 812         drm_mode_copy(&adv7511->curr_mode, adj_mode);
 813
 814         /*
 815          * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 816          * supposed to give better results.
 817          */
 818
 819         adv7511->f_tmds = mode->clock;
 820 }
 821
 822 /* -----------------------------------------------------------------------------
 823  * DRM Connector Operations
 824  */
 825
 826 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
 827 {
 828         return container_of(connector, struct adv7511, connector);
 829 }
 830
 831 static int adv7511_connector_get_modes(struct drm_connector *connector)
 832 {
 833         struct adv7511 *adv = connector_to_adv7511(connector);
 834
 835         return adv7511_get_modes(adv, connector);
 836 }
 837
 838 static enum drm_mode_status
 839 adv7511_connector_mode_valid(struct drm_connector *connector,
 840                              struct drm_display_mode *mode)
 841 {
 842         struct adv7511 *adv = connector_to_adv7511(connector);
 843
 844         return adv7511_mode_valid(adv, mode);
 845 }
 846
 847 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
 848         .get_modes = adv7511_connector_get_modes,
 849         .mode_valid = adv7511_connector_mode_valid,
 850 };
 851
 852 static enum drm_connector_status
 853 adv7511_connector_detect(struct drm_connector *connector, bool force)
 854 {
 855         struct adv7511 *adv = connector_to_adv7511(connector);
 856
 857         return adv7511_detect(adv, connector);
 858 }
 859
 860 static const struct drm_connector_funcs adv7511_connector_funcs = {
 861         .fill_modes = drm_helper_probe_single_connector_modes,
 862         .detect = adv7511_connector_detect,
 863         .destroy = drm_connector_cleanup,
 864         .reset = drm_atomic_helper_connector_reset,
 865         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 866         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 867 };
 868
 869 static int adv7511_connector_init(struct adv7511 *adv)
 870 {
 871         struct drm_bridge *bridge = &adv->bridge;
 872         int ret;
 873
 874         if (!bridge->encoder) {
 875                 DRM_ERROR("Parent encoder object not found");
 876                 return -ENODEV;
 877         }
 878
 879         if (adv->i2c_main->irq)
 880                 adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
 881         else
 882                 adv->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
 883                                 DRM_CONNECTOR_POLL_DISCONNECT;
 884
 885         ret = drm_connector_init(bridge->dev, &adv->connector,
 886                                  &adv7511_connector_funcs,
 887                                  DRM_MODE_CONNECTOR_HDMIA);
 888         if (ret < 0) {
 889                 DRM_ERROR("Failed to initialize connector with drm\n");
 890                 return ret;
 891         }
 892         drm_connector_helper_add(&adv->connector,
 893                                  &adv7511_connector_helper_funcs);
 894         drm_connector_attach_encoder(&adv->connector, bridge->encoder);
 895
 896         return 0;
 897 }
 898
 899 /* -----------------------------------------------------------------------------
 900  * DRM Bridge Operations
 901  */
 902
 903 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
 904 {
 905         return container_of(bridge, struct adv7511, bridge);
 906 }
 907
 908 static void adv7511_bridge_enable(struct drm_bridge *bridge)
 909 {
 910         struct adv7511 *adv = bridge_to_adv7511(bridge);
 911
 912         adv7511_power_on(adv);
 913 }
 914
 915 static void adv7511_bridge_disable(struct drm_bridge *bridge)
 916 {
 917         struct adv7511 *adv = bridge_to_adv7511(bridge);
 918
 919         adv7511_power_off(adv);
 920 }
 921
 922 static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
 923                                     const struct drm_display_mode *mode,
 924                                     const struct drm_display_mode *adj_mode)
 925 {
 926         struct adv7511 *adv = bridge_to_adv7511(bridge);
 927
 928         adv7511_mode_set(adv, mode, adj_mode);
 929 }
 930
 931 static enum drm_mode_status adv7511_bridge_mode_valid(struct drm_bridge *bridge,
 932                                                       const struct drm_display_info *info,
 933                 const struct drm_display_mode *mode)
 934 {
 935         struct adv7511 *adv = bridge_to_adv7511(bridge);
 936
 937         if (adv->info->has_dsi)
 938                 return adv7533_mode_valid(adv, mode);
 939         else
 940                 return adv7511_mode_valid(adv, mode);
 941 }
 942
 943 static int adv7511_bridge_attach(struct drm_bridge *bridge,
 944                                  enum drm_bridge_attach_flags flags)
 945 {
 946         struct adv7511 *adv = bridge_to_adv7511(bridge);
 947         int ret = 0;
 948
 949         if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
 950                 ret = adv7511_connector_init(adv);
 951                 if (ret < 0)
 952                         return ret;
 953         }
 954
 955         if (adv->i2c_main->irq)
 956                 regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0),
 957                              ADV7511_INT0_HPD);
 958
 959         return ret;
 960 }
 961
 962 static enum drm_connector_status adv7511_bridge_detect(struct drm_bridge *bridge)
 963 {
 964         struct adv7511 *adv = bridge_to_adv7511(bridge);
 965
 966         return adv7511_detect(adv, NULL);
 967 }
 968
 969 static const struct drm_edid *adv7511_bridge_edid_read(struct drm_bridge *bridge,
 970                                                        struct drm_connector *connector)
 971 {
 972         struct adv7511 *adv = bridge_to_adv7511(bridge);
 973
 974         return adv7511_edid_read(adv, connector);
 975 }
 976
 977 static void adv7511_bridge_hpd_notify(struct drm_bridge *bridge,
 978                                       enum drm_connector_status status)
 979 {
 980         struct adv7511 *adv = bridge_to_adv7511(bridge);
 981
 982         if (status == connector_status_disconnected)
 983                 cec_phys_addr_invalidate(adv->cec_adap);
 984 }
 985
 986 static const struct drm_bridge_funcs adv7511_bridge_funcs = {
 987         .enable = adv7511_bridge_enable,
 988         .disable = adv7511_bridge_disable,
 989         .mode_set = adv7511_bridge_mode_set,
 990         .mode_valid = adv7511_bridge_mode_valid,
 991         .attach = adv7511_bridge_attach,
 992         .detect = adv7511_bridge_detect,
 993         .edid_read = adv7511_bridge_edid_read,
 994         .hpd_notify = adv7511_bridge_hpd_notify,
 995 };
 996
 997 /* -----------------------------------------------------------------------------
 998  * Probe & remove
 999  */
1000
1001 static const char * const adv7511_supply_names[] = {
1002         "avdd",
1003         "dvdd",
1004         "pvdd",
1005         "bgvdd",
1006         "dvdd-3v",
1007 };
1008
1009 static const char * const adv7533_supply_names[] = {
1010         "avdd",
1011         "dvdd",
1012         "pvdd",
1013         "a2vdd",
1014         "v3p3",
1015         "v1p2",
1016 };
1017
1018 static int adv7511_init_regulators(struct adv7511 *adv)
1019 {
1020         const char * const *supply_names = adv->info->supply_names;
1021         unsigned int num_supplies = adv->info->num_supplies;
1022         struct device *dev = &adv->i2c_main->dev;
1023         unsigned int i;
1024         int ret;
1025
1026         adv->supplies = devm_kcalloc(dev, num_supplies,
1027                                      sizeof(*adv->supplies), GFP_KERNEL);
1028         if (!adv->supplies)
1029                 return -ENOMEM;
1030
1031         for (i = 0; i < num_supplies; i++)
1032                 adv->supplies[i].supply = supply_names[i];
1033
1034         ret = devm_regulator_bulk_get(dev, num_supplies, adv->supplies);
1035         if (ret)
1036                 return ret;
1037
1038         return regulator_bulk_enable(num_supplies, adv->supplies);
1039 }
1040
1041 static void adv7511_uninit_regulators(struct adv7511 *adv)
1042 {
1043         regulator_bulk_disable(adv->info->num_supplies, adv->supplies);
1044 }
1045
1046 static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
1047 {
1048         struct i2c_client *i2c = to_i2c_client(dev);
1049         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1050
1051         reg -= adv7511->info->reg_cec_offset;
1052
1053         switch (reg) {
1054         case ADV7511_REG_CEC_RX1_FRAME_HDR:
1055         case ADV7511_REG_CEC_RX1_FRAME_DATA0 ... ADV7511_REG_CEC_RX1_FRAME_DATA0 + 14:
1056         case ADV7511_REG_CEC_RX1_FRAME_LEN:
1057         case ADV7511_REG_CEC_RX2_FRAME_HDR:
1058         case ADV7511_REG_CEC_RX2_FRAME_DATA0 ... ADV7511_REG_CEC_RX2_FRAME_DATA0 + 14:
1059         case ADV7511_REG_CEC_RX2_FRAME_LEN:
1060         case ADV7511_REG_CEC_RX3_FRAME_HDR:
1061         case ADV7511_REG_CEC_RX3_FRAME_DATA0 ... ADV7511_REG_CEC_RX3_FRAME_DATA0 + 14:
1062         case ADV7511_REG_CEC_RX3_FRAME_LEN:
1063         case ADV7511_REG_CEC_RX_STATUS:
1064         case ADV7511_REG_CEC_RX_BUFFERS:
1065         case ADV7511_REG_CEC_TX_LOW_DRV_CNT:
1066                 return true;
1067         }
1068
1069         return false;
1070 }
1071
1072 static const struct regmap_config adv7511_cec_regmap_config = {
1073         .reg_bits = 8,
1074         .val_bits = 8,
1075
1076         .max_register = 0xff,
1077         .cache_type = REGCACHE_MAPLE,
1078         .volatile_reg = adv7511_cec_register_volatile,
1079 };
1080
1081 static int adv7511_init_cec_regmap(struct adv7511 *adv)
1082 {
1083         int ret;
1084
1085         adv->i2c_cec = i2c_new_ancillary_device(adv->i2c_main, "cec",
1086                                                 ADV7511_CEC_I2C_ADDR_DEFAULT);
1087         if (IS_ERR(adv->i2c_cec))
1088                 return PTR_ERR(adv->i2c_cec);
1089
1090         regmap_write(adv->regmap, ADV7511_REG_CEC_I2C_ADDR,
1091                      adv->i2c_cec->addr << 1);
1092
1093         i2c_set_clientdata(adv->i2c_cec, adv);
1094
1095         adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
1096                                         &adv7511_cec_regmap_config);
1097         if (IS_ERR(adv->regmap_cec)) {
1098                 ret = PTR_ERR(adv->regmap_cec);
1099                 goto err;
1100         }
1101
1102         if (adv->info->reg_cec_offset == ADV7533_REG_CEC_OFFSET) {
1103                 ret = adv7533_patch_cec_registers(adv);
1104                 if (ret)
1105                         goto err;
1106         }
1107
1108         return 0;
1109 err:
1110         i2c_unregister_device(adv->i2c_cec);
1111         return ret;
1112 }
1113
1114 static int adv7511_parse_dt(struct device_node *np,
1115                             struct adv7511_link_config *config)
1116 {
1117         const char *str;
1118         int ret;
1119
1120         of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
1121         if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
1122             config->input_color_depth != 12)
1123                 return -EINVAL;
1124
1125         ret = of_property_read_string(np, "adi,input-colorspace", &str);
1126         if (ret < 0)
1127                 return ret;
1128
1129         if (!strcmp(str, "rgb"))
1130                 config->input_colorspace = HDMI_COLORSPACE_RGB;
1131         else if (!strcmp(str, "yuv422"))
1132                 config->input_colorspace = HDMI_COLORSPACE_YUV422;
1133         else if (!strcmp(str, "yuv444"))
1134                 config->input_colorspace = HDMI_COLORSPACE_YUV444;
1135         else
1136                 return -EINVAL;
1137
1138         ret = of_property_read_string(np, "adi,input-clock", &str);
1139         if (ret < 0)
1140                 return ret;
1141
1142         if (!strcmp(str, "1x"))
1143                 config->input_clock = ADV7511_INPUT_CLOCK_1X;
1144         else if (!strcmp(str, "2x"))
1145                 config->input_clock = ADV7511_INPUT_CLOCK_2X;
1146         else if (!strcmp(str, "ddr"))
1147                 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
1148         else
1149                 return -EINVAL;
1150
1151         if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
1152             config->input_clock != ADV7511_INPUT_CLOCK_1X) {
1153                 ret = of_property_read_u32(np, "adi,input-style",
1154                                            &config->input_style);
1155                 if (ret)
1156                         return ret;
1157
1158                 if (config->input_style < 1 || config->input_style > 3)
1159                         return -EINVAL;
1160
1161                 ret = of_property_read_string(np, "adi,input-justification",
1162                                               &str);
1163                 if (ret < 0)
1164                         return ret;
1165
1166                 if (!strcmp(str, "left"))
1167                         config->input_justification =
1168                                 ADV7511_INPUT_JUSTIFICATION_LEFT;
1169                 else if (!strcmp(str, "evenly"))
1170                         config->input_justification =
1171                                 ADV7511_INPUT_JUSTIFICATION_EVENLY;
1172                 else if (!strcmp(str, "right"))
1173                         config->input_justification =
1174                                 ADV7511_INPUT_JUSTIFICATION_RIGHT;
1175                 else
1176                         return -EINVAL;
1177
1178         } else {
1179                 config->input_style = 1;
1180                 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
1181         }
1182
1183         of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
1184         if (config->clock_delay < -1200 || config->clock_delay > 1600)
1185                 return -EINVAL;
1186
1187         config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
1188
1189         /* Hardcode the sync pulse configurations for now. */
1190         config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
1191         config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
1192         config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
1193
1194         return 0;
1195 }
1196
1197 static int adv7511_probe(struct i2c_client *i2c)
1198 {
1199         struct adv7511_link_config link_config;
1200         struct adv7511 *adv7511;
1201         struct device *dev = &i2c->dev;
1202         unsigned int val;
1203         int ret;
1204
1205         if (!dev->of_node)
1206                 return -EINVAL;
1207
1208         adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
1209         if (!adv7511)
1210                 return -ENOMEM;
1211
1212         adv7511->i2c_main = i2c;
1213         adv7511->powered = false;
1214         adv7511->status = connector_status_disconnected;
1215         adv7511->info = i2c_get_match_data(i2c);
1216
1217         memset(&link_config, 0, sizeof(link_config));
1218
1219         if (adv7511->info->link_config)
1220                 ret = adv7511_parse_dt(dev->of_node, &link_config);
1221         else
1222                 ret = adv7533_parse_dt(dev->of_node, adv7511);
1223         if (ret)
1224                 return ret;
1225
1226         ret = adv7511_init_regulators(adv7511);
1227         if (ret)
1228                 return dev_err_probe(dev, ret, "failed to init regulators\n");
1229
1230         /*
1231          * The power down GPIO is optional. If present, toggle it from active to
1232          * inactive to wake up the encoder.
1233          */
1234         adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
1235         if (IS_ERR(adv7511->gpio_pd)) {
1236                 ret = PTR_ERR(adv7511->gpio_pd);
1237                 goto uninit_regulators;
1238         }
1239
1240         if (adv7511->gpio_pd) {
1241                 usleep_range(5000, 6000);
1242                 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
1243         }
1244
1245         adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
1246         if (IS_ERR(adv7511->regmap)) {
1247                 ret = PTR_ERR(adv7511->regmap);
1248                 goto uninit_regulators;
1249         }
1250
1251         ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
1252         if (ret)
1253                 goto uninit_regulators;
1254         dev_dbg(dev, "Rev. %d\n", val);
1255
1256         if (adv7511->info->type == ADV7511)
1257                 ret = regmap_register_patch(adv7511->regmap,
1258                                             adv7511_fixed_registers,
1259                                             ARRAY_SIZE(adv7511_fixed_registers));
1260         else
1261                 ret = adv7533_patch_registers(adv7511);
1262         if (ret)
1263                 goto uninit_regulators;
1264
1265         adv7511_packet_disable(adv7511, 0xffff);
1266
1267         adv7511->i2c_edid = i2c_new_ancillary_device(i2c, "edid",
1268                                         ADV7511_EDID_I2C_ADDR_DEFAULT);
1269         if (IS_ERR(adv7511->i2c_edid)) {
1270                 ret = PTR_ERR(adv7511->i2c_edid);
1271                 goto uninit_regulators;
1272         }
1273
1274         regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
1275                      adv7511->i2c_edid->addr << 1);
1276
1277         adv7511->i2c_packet = i2c_new_ancillary_device(i2c, "packet",
1278                                         ADV7511_PACKET_I2C_ADDR_DEFAULT);
1279         if (IS_ERR(adv7511->i2c_packet)) {
1280                 ret = PTR_ERR(adv7511->i2c_packet);
1281                 goto err_i2c_unregister_edid;
1282         }
1283
1284         regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
1285                      adv7511->i2c_packet->addr << 1);
1286
1287         ret = adv7511_init_cec_regmap(adv7511);
1288         if (ret)
1289                 goto err_i2c_unregister_packet;
1290
1291         INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
1292
1293         adv7511_power_off(adv7511);
1294
1295         i2c_set_clientdata(i2c, adv7511);
1296
1297         if (adv7511->info->link_config)
1298                 adv7511_set_link_config(adv7511, &link_config);
1299
1300         ret = adv7511_cec_init(dev, adv7511);
1301         if (ret)
1302                 goto err_unregister_cec;
1303
1304         adv7511->bridge.funcs = &adv7511_bridge_funcs;
1305         adv7511->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
1306         if (adv7511->i2c_main->irq)
1307                 adv7511->bridge.ops |= DRM_BRIDGE_OP_HPD;
1308
1309         adv7511->bridge.of_node = dev->of_node;
1310         adv7511->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1311
1312         drm_bridge_add(&adv7511->bridge);
1313
1314         adv7511_audio_init(dev, adv7511);
1315
1316         if (i2c->irq) {
1317                 init_waitqueue_head(&adv7511->wq);
1318
1319                 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
1320                                                 adv7511_irq_handler,
1321                                                 IRQF_ONESHOT, dev_name(dev),
1322                                                 adv7511);
1323                 if (ret)
1324                         goto err_unregister_audio;
1325         }
1326
1327         if (adv7511->info->has_dsi) {
1328                 ret = adv7533_attach_dsi(adv7511);
1329                 if (ret)
1330                         goto err_unregister_audio;
1331         }
1332
1333         return 0;
1334
1335 err_unregister_audio:
1336         adv7511_audio_exit(adv7511);
1337         drm_bridge_remove(&adv7511->bridge);
1338 err_unregister_cec:
1339         cec_unregister_adapter(adv7511->cec_adap);
1340         i2c_unregister_device(adv7511->i2c_cec);
1341         clk_disable_unprepare(adv7511->cec_clk);
1342 err_i2c_unregister_packet:
1343         i2c_unregister_device(adv7511->i2c_packet);
1344 err_i2c_unregister_edid:
1345         i2c_unregister_device(adv7511->i2c_edid);
1346 uninit_regulators:
1347         adv7511_uninit_regulators(adv7511);
1348
1349         return ret;
1350 }
1351
1352 static void adv7511_remove(struct i2c_client *i2c)
1353 {
1354         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1355
1356         adv7511_uninit_regulators(adv7511);
1357
1358         drm_bridge_remove(&adv7511->bridge);
1359
1360         adv7511_audio_exit(adv7511);
1361
1362         cec_unregister_adapter(adv7511->cec_adap);
1363         i2c_unregister_device(adv7511->i2c_cec);
1364         clk_disable_unprepare(adv7511->cec_clk);
1365
1366         i2c_unregister_device(adv7511->i2c_packet);
1367         i2c_unregister_device(adv7511->i2c_edid);
1368 }
1369
1370 static const struct adv7511_chip_info adv7511_chip_info = {
1371         .type = ADV7511,
1372         .supply_names = adv7511_supply_names,
1373         .num_supplies = ARRAY_SIZE(adv7511_supply_names),
1374         .link_config = true,
1375 };
1376
1377 static const struct adv7511_chip_info adv7533_chip_info = {
1378         .type = ADV7533,
1379         .max_mode_clock_khz = 80000,
1380         .max_lane_freq_khz = 800000,
1381         .supply_names = adv7533_supply_names,
1382         .num_supplies = ARRAY_SIZE(adv7533_supply_names),
1383         .reg_cec_offset = ADV7533_REG_CEC_OFFSET,
1384         .has_dsi = true,
1385 };
1386
1387 static const struct adv7511_chip_info adv7535_chip_info = {
1388         .type = ADV7535,
1389         .max_mode_clock_khz = 148500,
1390         .max_lane_freq_khz = 891000,
1391         .supply_names = adv7533_supply_names,
1392         .num_supplies = ARRAY_SIZE(adv7533_supply_names),
1393         .reg_cec_offset = ADV7533_REG_CEC_OFFSET,
1394         .has_dsi = true,
1395         .hpd_override_enable = true,
1396 };
1397
1398 static const struct i2c_device_id adv7511_i2c_ids[] = {
1399         { "adv7511", (kernel_ulong_t)&adv7511_chip_info },
1400         { "adv7511w", (kernel_ulong_t)&adv7511_chip_info },
1401         { "adv7513", (kernel_ulong_t)&adv7511_chip_info },
1402         { "adv7533", (kernel_ulong_t)&adv7533_chip_info },
1403         { "adv7535", (kernel_ulong_t)&adv7535_chip_info },
1404         { }
1405 };
1406 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
1407
1408 static const struct of_device_id adv7511_of_ids[] = {
1409         { .compatible = "adi,adv7511", .data = &adv7511_chip_info },
1410         { .compatible = "adi,adv7511w", .data = &adv7511_chip_info },
1411         { .compatible = "adi,adv7513", .data = &adv7511_chip_info },
1412         { .compatible = "adi,adv7533", .data = &adv7533_chip_info },
1413         { .compatible = "adi,adv7535", .data = &adv7535_chip_info },
1414         { }
1415 };
1416 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
1417
1418 static struct mipi_dsi_driver adv7533_dsi_driver = {
1419         .driver.name = "adv7533",
1420 };
1421
1422 static struct i2c_driver adv7511_driver = {
1423         .driver = {
1424                 .name = "adv7511",
1425                 .of_match_table = adv7511_of_ids,
1426         },
1427         .id_table = adv7511_i2c_ids,
1428         .probe = adv7511_probe,
1429         .remove = adv7511_remove,
1430 };
1431
1432 static int __init adv7511_init(void)
1433 {
1434         int ret;
1435
1436         if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
1437                 ret = mipi_dsi_driver_register(&adv7533_dsi_driver);
1438                 if (ret)
1439                         return ret;
1440         }
1441
1442         ret = i2c_add_driver(&adv7511_driver);
1443         if (ret) {
1444                 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1445                         mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1446         }
1447
1448         return ret;
1449 }
1450 module_init(adv7511_init);
1451
1452 static void __exit adv7511_exit(void)
1453 {
1454         i2c_del_driver(&adv7511_driver);
1455
1456         if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1457                 mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1458 }
1459 module_exit(adv7511_exit);
1460
1461 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1462 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1463 MODULE_LICENSE("GPL");