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_device.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_RBTREE,
 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->type == ADV7535)
 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->type == ADV7533 || adv7511->type == ADV7535)
 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->type == ADV7535)
 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->type == ADV7533 || adv7511->type == ADV7535)
 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 struct edid *adv7511_get_edid(struct adv7511 *adv7511,
 608                                      struct drm_connector *connector)
 609 {
 610         struct edid *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         edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
 625
 626         if (!adv7511->powered)
 627                 __adv7511_power_off(adv7511);
 628
 629         adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
 630                                drm_detect_hdmi_monitor(edid));
 631
 632         cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
 633
 634         return edid;
 635 }
 636
 637 static int adv7511_get_modes(struct adv7511 *adv7511,
 638                              struct drm_connector *connector)
 639 {
 640         struct edid *edid;
 641         unsigned int count;
 642
 643         edid = adv7511_get_edid(adv7511, connector);
 644
 645         drm_connector_update_edid_property(connector, edid);
 646         count = drm_add_edid_modes(connector, edid);
 647
 648         kfree(edid);
 649
 650         return count;
 651 }
 652
 653 static enum drm_connector_status
 654 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
 655 {
 656         enum drm_connector_status status;
 657         unsigned int val;
 658         bool hpd;
 659         int ret;
 660
 661         ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 662         if (ret < 0)
 663                 return connector_status_disconnected;
 664
 665         if (val & ADV7511_STATUS_HPD)
 666                 status = connector_status_connected;
 667         else
 668                 status = connector_status_disconnected;
 669
 670         hpd = adv7511_hpd(adv7511);
 671
 672         /* The chip resets itself when the cable is disconnected, so in case
 673          * there is a pending HPD interrupt and the cable is connected there was
 674          * at least one transition from disconnected to connected and the chip
 675          * has to be reinitialized. */
 676         if (status == connector_status_connected && hpd && adv7511->powered) {
 677                 regcache_mark_dirty(adv7511->regmap);
 678                 adv7511_power_on(adv7511);
 679                 if (connector)
 680                         adv7511_get_modes(adv7511, connector);
 681                 if (adv7511->status == connector_status_connected)
 682                         status = connector_status_disconnected;
 683         } else {
 684                 /* Renable HPD sensing */
 685                 if (adv7511->type == ADV7535)
 686                         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 687                                            ADV7535_REG_POWER2_HPD_OVERRIDE,
 688                                            ADV7535_REG_POWER2_HPD_OVERRIDE);
 689                 else
 690                         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 691                                            ADV7511_REG_POWER2_HPD_SRC_MASK,
 692                                            ADV7511_REG_POWER2_HPD_SRC_BOTH);
 693         }
 694
 695         adv7511->status = status;
 696         return status;
 697 }
 698
 699 static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511,
 700                               struct drm_display_mode *mode)
 701 {
 702         if (mode->clock > 165000)
 703                 return MODE_CLOCK_HIGH;
 704
 705         return MODE_OK;
 706 }
 707
 708 static void adv7511_mode_set(struct adv7511 *adv7511,
 709                              const struct drm_display_mode *mode,
 710                              const struct drm_display_mode *adj_mode)
 711 {
 712         unsigned int low_refresh_rate;
 713         unsigned int hsync_polarity = 0;
 714         unsigned int vsync_polarity = 0;
 715
 716         if (adv7511->embedded_sync) {
 717                 unsigned int hsync_offset, hsync_len;
 718                 unsigned int vsync_offset, vsync_len;
 719
 720                 hsync_offset = adj_mode->crtc_hsync_start -
 721                                adj_mode->crtc_hdisplay;
 722                 vsync_offset = adj_mode->crtc_vsync_start -
 723                                adj_mode->crtc_vdisplay;
 724                 hsync_len = adj_mode->crtc_hsync_end -
 725                             adj_mode->crtc_hsync_start;
 726                 vsync_len = adj_mode->crtc_vsync_end -
 727                             adj_mode->crtc_vsync_start;
 728
 729                 /* The hardware vsync generator has a off-by-one bug */
 730                 vsync_offset += 1;
 731
 732                 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
 733                              ((hsync_offset >> 10) & 0x7) << 5);
 734                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
 735                              (hsync_offset >> 2) & 0xff);
 736                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
 737                              ((hsync_offset & 0x3) << 6) |
 738                              ((hsync_len >> 4) & 0x3f));
 739                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
 740                              ((hsync_len & 0xf) << 4) |
 741                              ((vsync_offset >> 6) & 0xf));
 742                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
 743                              ((vsync_offset & 0x3f) << 2) |
 744                              ((vsync_len >> 8) & 0x3));
 745                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
 746                              vsync_len & 0xff);
 747
 748                 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
 749                 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
 750         } else {
 751                 enum adv7511_sync_polarity mode_hsync_polarity;
 752                 enum adv7511_sync_polarity mode_vsync_polarity;
 753
 754                 /**
 755                  * If the input signal is always low or always high we want to
 756                  * invert or let it passthrough depending on the polarity of the
 757                  * current mode.
 758                  **/
 759                 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
 760                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 761                 else
 762                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 763
 764                 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
 765                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 766                 else
 767                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 768
 769                 if (adv7511->hsync_polarity != mode_hsync_polarity &&
 770                     adv7511->hsync_polarity !=
 771                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 772                         hsync_polarity = 1;
 773
 774                 if (adv7511->vsync_polarity != mode_vsync_polarity &&
 775                     adv7511->vsync_polarity !=
 776                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 777                         vsync_polarity = 1;
 778         }
 779
 780         if (drm_mode_vrefresh(mode) <= 24)
 781                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
 782         else if (drm_mode_vrefresh(mode) <= 25)
 783                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
 784         else if (drm_mode_vrefresh(mode) <= 30)
 785                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
 786         else
 787                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 788
 789         regmap_update_bits(adv7511->regmap, 0xfb,
 790                 0x6, low_refresh_rate << 1);
 791         regmap_update_bits(adv7511->regmap, 0x17,
 792                 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 793
 794         if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
 795                 adv7533_mode_set(adv7511, adj_mode);
 796
 797         drm_mode_copy(&adv7511->curr_mode, adj_mode);
 798
 799         /*
 800          * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 801          * supposed to give better results.
 802          */
 803
 804         adv7511->f_tmds = mode->clock;
 805 }
 806
 807 /* -----------------------------------------------------------------------------
 808  * DRM Connector Operations
 809  */
 810
 811 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
 812 {
 813         return container_of(connector, struct adv7511, connector);
 814 }
 815
 816 static int adv7511_connector_get_modes(struct drm_connector *connector)
 817 {
 818         struct adv7511 *adv = connector_to_adv7511(connector);
 819
 820         return adv7511_get_modes(adv, connector);
 821 }
 822
 823 static enum drm_mode_status
 824 adv7511_connector_mode_valid(struct drm_connector *connector,
 825                              struct drm_display_mode *mode)
 826 {
 827         struct adv7511 *adv = connector_to_adv7511(connector);
 828
 829         return adv7511_mode_valid(adv, mode);
 830 }
 831
 832 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
 833         .get_modes = adv7511_connector_get_modes,
 834         .mode_valid = adv7511_connector_mode_valid,
 835 };
 836
 837 static enum drm_connector_status
 838 adv7511_connector_detect(struct drm_connector *connector, bool force)
 839 {
 840         struct adv7511 *adv = connector_to_adv7511(connector);
 841
 842         return adv7511_detect(adv, connector);
 843 }
 844
 845 static const struct drm_connector_funcs adv7511_connector_funcs = {
 846         .fill_modes = drm_helper_probe_single_connector_modes,
 847         .detect = adv7511_connector_detect,
 848         .destroy = drm_connector_cleanup,
 849         .reset = drm_atomic_helper_connector_reset,
 850         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 851         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 852 };
 853
 854 static int adv7511_connector_init(struct adv7511 *adv)
 855 {
 856         struct drm_bridge *bridge = &adv->bridge;
 857         int ret;
 858
 859         if (!bridge->encoder) {
 860                 DRM_ERROR("Parent encoder object not found");
 861                 return -ENODEV;
 862         }
 863
 864         if (adv->i2c_main->irq)
 865                 adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
 866         else
 867                 adv->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
 868                                 DRM_CONNECTOR_POLL_DISCONNECT;
 869
 870         ret = drm_connector_init(bridge->dev, &adv->connector,
 871                                  &adv7511_connector_funcs,
 872                                  DRM_MODE_CONNECTOR_HDMIA);
 873         if (ret < 0) {
 874                 DRM_ERROR("Failed to initialize connector with drm\n");
 875                 return ret;
 876         }
 877         drm_connector_helper_add(&adv->connector,
 878                                  &adv7511_connector_helper_funcs);
 879         drm_connector_attach_encoder(&adv->connector, bridge->encoder);
 880
 881         return 0;
 882 }
 883
 884 /* -----------------------------------------------------------------------------
 885  * DRM Bridge Operations
 886  */
 887
 888 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
 889 {
 890         return container_of(bridge, struct adv7511, bridge);
 891 }
 892
 893 static void adv7511_bridge_enable(struct drm_bridge *bridge)
 894 {
 895         struct adv7511 *adv = bridge_to_adv7511(bridge);
 896
 897         adv7511_power_on(adv);
 898 }
 899
 900 static void adv7511_bridge_disable(struct drm_bridge *bridge)
 901 {
 902         struct adv7511 *adv = bridge_to_adv7511(bridge);
 903
 904         adv7511_power_off(adv);
 905 }
 906
 907 static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
 908                                     const struct drm_display_mode *mode,
 909                                     const struct drm_display_mode *adj_mode)
 910 {
 911         struct adv7511 *adv = bridge_to_adv7511(bridge);
 912
 913         adv7511_mode_set(adv, mode, adj_mode);
 914 }
 915
 916 static int adv7511_bridge_attach(struct drm_bridge *bridge,
 917                                  enum drm_bridge_attach_flags flags)
 918 {
 919         struct adv7511 *adv = bridge_to_adv7511(bridge);
 920         int ret = 0;
 921
 922         if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
 923                 ret = adv7511_connector_init(adv);
 924                 if (ret < 0)
 925                         return ret;
 926         }
 927
 928         if (adv->i2c_main->irq)
 929                 regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0),
 930                              ADV7511_INT0_HPD);
 931
 932         return ret;
 933 }
 934
 935 static enum drm_connector_status adv7511_bridge_detect(struct drm_bridge *bridge)
 936 {
 937         struct adv7511 *adv = bridge_to_adv7511(bridge);
 938
 939         return adv7511_detect(adv, NULL);
 940 }
 941
 942 static struct edid *adv7511_bridge_get_edid(struct drm_bridge *bridge,
 943                                             struct drm_connector *connector)
 944 {
 945         struct adv7511 *adv = bridge_to_adv7511(bridge);
 946
 947         return adv7511_get_edid(adv, connector);
 948 }
 949
 950 static void adv7511_bridge_hpd_notify(struct drm_bridge *bridge,
 951                                       enum drm_connector_status status)
 952 {
 953         struct adv7511 *adv = bridge_to_adv7511(bridge);
 954
 955         if (status == connector_status_disconnected)
 956                 cec_phys_addr_invalidate(adv->cec_adap);
 957 }
 958
 959 static const struct drm_bridge_funcs adv7511_bridge_funcs = {
 960         .enable = adv7511_bridge_enable,
 961         .disable = adv7511_bridge_disable,
 962         .mode_set = adv7511_bridge_mode_set,
 963         .attach = adv7511_bridge_attach,
 964         .detect = adv7511_bridge_detect,
 965         .get_edid = adv7511_bridge_get_edid,
 966         .hpd_notify = adv7511_bridge_hpd_notify,
 967 };
 968
 969 /* -----------------------------------------------------------------------------
 970  * Probe & remove
 971  */
 972
 973 static const char * const adv7511_supply_names[] = {
 974         "avdd",
 975         "dvdd",
 976         "pvdd",
 977         "bgvdd",
 978         "dvdd-3v",
 979 };
 980
 981 static const char * const adv7533_supply_names[] = {
 982         "avdd",
 983         "dvdd",
 984         "pvdd",
 985         "a2vdd",
 986         "v3p3",
 987         "v1p2",
 988 };
 989
 990 static int adv7511_init_regulators(struct adv7511 *adv)
 991 {
 992         struct device *dev = &adv->i2c_main->dev;
 993         const char * const *supply_names;
 994         unsigned int i;
 995         int ret;
 996
 997         if (adv->type == ADV7511) {
 998                 supply_names = adv7511_supply_names;
 999                 adv->num_supplies = ARRAY_SIZE(adv7511_supply_names);
1000         } else {
1001                 supply_names = adv7533_supply_names;
1002                 adv->num_supplies = ARRAY_SIZE(adv7533_supply_names);
1003         }
1004
1005         adv->supplies = devm_kcalloc(dev, adv->num_supplies,
1006                                      sizeof(*adv->supplies), GFP_KERNEL);
1007         if (!adv->supplies)
1008                 return -ENOMEM;
1009
1010         for (i = 0; i < adv->num_supplies; i++)
1011                 adv->supplies[i].supply = supply_names[i];
1012
1013         ret = devm_regulator_bulk_get(dev, adv->num_supplies, adv->supplies);
1014         if (ret)
1015                 return ret;
1016
1017         return regulator_bulk_enable(adv->num_supplies, adv->supplies);
1018 }
1019
1020 static void adv7511_uninit_regulators(struct adv7511 *adv)
1021 {
1022         regulator_bulk_disable(adv->num_supplies, adv->supplies);
1023 }
1024
1025 static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
1026 {
1027         struct i2c_client *i2c = to_i2c_client(dev);
1028         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1029
1030         reg -= adv7511->reg_cec_offset;
1031
1032         switch (reg) {
1033         case ADV7511_REG_CEC_RX1_FRAME_HDR:
1034         case ADV7511_REG_CEC_RX1_FRAME_DATA0 ... ADV7511_REG_CEC_RX1_FRAME_DATA0 + 14:
1035         case ADV7511_REG_CEC_RX1_FRAME_LEN:
1036         case ADV7511_REG_CEC_RX2_FRAME_HDR:
1037         case ADV7511_REG_CEC_RX2_FRAME_DATA0 ... ADV7511_REG_CEC_RX2_FRAME_DATA0 + 14:
1038         case ADV7511_REG_CEC_RX2_FRAME_LEN:
1039         case ADV7511_REG_CEC_RX3_FRAME_HDR:
1040         case ADV7511_REG_CEC_RX3_FRAME_DATA0 ... ADV7511_REG_CEC_RX3_FRAME_DATA0 + 14:
1041         case ADV7511_REG_CEC_RX3_FRAME_LEN:
1042         case ADV7511_REG_CEC_RX_STATUS:
1043         case ADV7511_REG_CEC_RX_BUFFERS:
1044         case ADV7511_REG_CEC_TX_LOW_DRV_CNT:
1045                 return true;
1046         }
1047
1048         return false;
1049 }
1050
1051 static const struct regmap_config adv7511_cec_regmap_config = {
1052         .reg_bits = 8,
1053         .val_bits = 8,
1054
1055         .max_register = 0xff,
1056         .cache_type = REGCACHE_RBTREE,
1057         .volatile_reg = adv7511_cec_register_volatile,
1058 };
1059
1060 static int adv7511_init_cec_regmap(struct adv7511 *adv)
1061 {
1062         int ret;
1063
1064         adv->i2c_cec = i2c_new_ancillary_device(adv->i2c_main, "cec",
1065                                                 ADV7511_CEC_I2C_ADDR_DEFAULT);
1066         if (IS_ERR(adv->i2c_cec))
1067                 return PTR_ERR(adv->i2c_cec);
1068
1069         regmap_write(adv->regmap, ADV7511_REG_CEC_I2C_ADDR,
1070                      adv->i2c_cec->addr << 1);
1071
1072         i2c_set_clientdata(adv->i2c_cec, adv);
1073
1074         adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
1075                                         &adv7511_cec_regmap_config);
1076         if (IS_ERR(adv->regmap_cec)) {
1077                 ret = PTR_ERR(adv->regmap_cec);
1078                 goto err;
1079         }
1080
1081         if (adv->type == ADV7533 || adv->type == ADV7535) {
1082                 ret = adv7533_patch_cec_registers(adv);
1083                 if (ret)
1084                         goto err;
1085
1086                 adv->reg_cec_offset = ADV7533_REG_CEC_OFFSET;
1087         }
1088
1089         return 0;
1090 err:
1091         i2c_unregister_device(adv->i2c_cec);
1092         return ret;
1093 }
1094
1095 static int adv7511_parse_dt(struct device_node *np,
1096                             struct adv7511_link_config *config)
1097 {
1098         const char *str;
1099         int ret;
1100
1101         of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
1102         if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
1103             config->input_color_depth != 12)
1104                 return -EINVAL;
1105
1106         ret = of_property_read_string(np, "adi,input-colorspace", &str);
1107         if (ret < 0)
1108                 return ret;
1109
1110         if (!strcmp(str, "rgb"))
1111                 config->input_colorspace = HDMI_COLORSPACE_RGB;
1112         else if (!strcmp(str, "yuv422"))
1113                 config->input_colorspace = HDMI_COLORSPACE_YUV422;
1114         else if (!strcmp(str, "yuv444"))
1115                 config->input_colorspace = HDMI_COLORSPACE_YUV444;
1116         else
1117                 return -EINVAL;
1118
1119         ret = of_property_read_string(np, "adi,input-clock", &str);
1120         if (ret < 0)
1121                 return ret;
1122
1123         if (!strcmp(str, "1x"))
1124                 config->input_clock = ADV7511_INPUT_CLOCK_1X;
1125         else if (!strcmp(str, "2x"))
1126                 config->input_clock = ADV7511_INPUT_CLOCK_2X;
1127         else if (!strcmp(str, "ddr"))
1128                 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
1129         else
1130                 return -EINVAL;
1131
1132         if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
1133             config->input_clock != ADV7511_INPUT_CLOCK_1X) {
1134                 ret = of_property_read_u32(np, "adi,input-style",
1135                                            &config->input_style);
1136                 if (ret)
1137                         return ret;
1138
1139                 if (config->input_style < 1 || config->input_style > 3)
1140                         return -EINVAL;
1141
1142                 ret = of_property_read_string(np, "adi,input-justification",
1143                                               &str);
1144                 if (ret < 0)
1145                         return ret;
1146
1147                 if (!strcmp(str, "left"))
1148                         config->input_justification =
1149                                 ADV7511_INPUT_JUSTIFICATION_LEFT;
1150                 else if (!strcmp(str, "evenly"))
1151                         config->input_justification =
1152                                 ADV7511_INPUT_JUSTIFICATION_EVENLY;
1153                 else if (!strcmp(str, "right"))
1154                         config->input_justification =
1155                                 ADV7511_INPUT_JUSTIFICATION_RIGHT;
1156                 else
1157                         return -EINVAL;
1158
1159         } else {
1160                 config->input_style = 1;
1161                 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
1162         }
1163
1164         of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
1165         if (config->clock_delay < -1200 || config->clock_delay > 1600)
1166                 return -EINVAL;
1167
1168         config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
1169
1170         /* Hardcode the sync pulse configurations for now. */
1171         config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
1172         config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
1173         config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
1174
1175         return 0;
1176 }
1177
1178 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
1179 {
1180         struct adv7511_link_config link_config;
1181         struct adv7511 *adv7511;
1182         struct device *dev = &i2c->dev;
1183         unsigned int val;
1184         int ret;
1185
1186         if (!dev->of_node)
1187                 return -EINVAL;
1188
1189         adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
1190         if (!adv7511)
1191                 return -ENOMEM;
1192
1193         adv7511->i2c_main = i2c;
1194         adv7511->powered = false;
1195         adv7511->status = connector_status_disconnected;
1196
1197         if (dev->of_node)
1198                 adv7511->type = (enum adv7511_type)of_device_get_match_data(dev);
1199         else
1200                 adv7511->type = id->driver_data;
1201
1202         memset(&link_config, 0, sizeof(link_config));
1203
1204         if (adv7511->type == ADV7511)
1205                 ret = adv7511_parse_dt(dev->of_node, &link_config);
1206         else
1207                 ret = adv7533_parse_dt(dev->of_node, adv7511);
1208         if (ret)
1209                 return ret;
1210
1211         ret = adv7511_init_regulators(adv7511);
1212         if (ret) {
1213                 dev_err(dev, "failed to init regulators\n");
1214                 return ret;
1215         }
1216
1217         /*
1218          * The power down GPIO is optional. If present, toggle it from active to
1219          * inactive to wake up the encoder.
1220          */
1221         adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
1222         if (IS_ERR(adv7511->gpio_pd)) {
1223                 ret = PTR_ERR(adv7511->gpio_pd);
1224                 goto uninit_regulators;
1225         }
1226
1227         if (adv7511->gpio_pd) {
1228                 usleep_range(5000, 6000);
1229                 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
1230         }
1231
1232         adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
1233         if (IS_ERR(adv7511->regmap)) {
1234                 ret = PTR_ERR(adv7511->regmap);
1235                 goto uninit_regulators;
1236         }
1237
1238         ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
1239         if (ret)
1240                 goto uninit_regulators;
1241         dev_dbg(dev, "Rev. %d\n", val);
1242
1243         if (adv7511->type == ADV7511)
1244                 ret = regmap_register_patch(adv7511->regmap,
1245                                             adv7511_fixed_registers,
1246                                             ARRAY_SIZE(adv7511_fixed_registers));
1247         else
1248                 ret = adv7533_patch_registers(adv7511);
1249         if (ret)
1250                 goto uninit_regulators;
1251
1252         adv7511_packet_disable(adv7511, 0xffff);
1253
1254         adv7511->i2c_edid = i2c_new_ancillary_device(i2c, "edid",
1255                                         ADV7511_EDID_I2C_ADDR_DEFAULT);
1256         if (IS_ERR(adv7511->i2c_edid)) {
1257                 ret = PTR_ERR(adv7511->i2c_edid);
1258                 goto uninit_regulators;
1259         }
1260
1261         regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
1262                      adv7511->i2c_edid->addr << 1);
1263
1264         adv7511->i2c_packet = i2c_new_ancillary_device(i2c, "packet",
1265                                         ADV7511_PACKET_I2C_ADDR_DEFAULT);
1266         if (IS_ERR(adv7511->i2c_packet)) {
1267                 ret = PTR_ERR(adv7511->i2c_packet);
1268                 goto err_i2c_unregister_edid;
1269         }
1270
1271         regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
1272                      adv7511->i2c_packet->addr << 1);
1273
1274         ret = adv7511_init_cec_regmap(adv7511);
1275         if (ret)
1276                 goto err_i2c_unregister_packet;
1277
1278         INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
1279
1280         if (i2c->irq) {
1281                 init_waitqueue_head(&adv7511->wq);
1282
1283                 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
1284                                                 adv7511_irq_handler,
1285                                                 IRQF_ONESHOT, dev_name(dev),
1286                                                 adv7511);
1287                 if (ret)
1288                         goto err_unregister_cec;
1289         }
1290
1291         adv7511_power_off(adv7511);
1292
1293         i2c_set_clientdata(i2c, adv7511);
1294
1295         if (adv7511->type == ADV7511)
1296                 adv7511_set_link_config(adv7511, &link_config);
1297
1298         ret = adv7511_cec_init(dev, adv7511);
1299         if (ret)
1300                 goto err_unregister_cec;
1301
1302         adv7511->bridge.funcs = &adv7511_bridge_funcs;
1303         adv7511->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
1304         if (adv7511->i2c_main->irq)
1305                 adv7511->bridge.ops |= DRM_BRIDGE_OP_HPD;
1306
1307         adv7511->bridge.of_node = dev->of_node;
1308         adv7511->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1309
1310         drm_bridge_add(&adv7511->bridge);
1311
1312         adv7511_audio_init(dev, adv7511);
1313
1314         if (adv7511->type == ADV7533 || adv7511->type == ADV7535) {
1315                 ret = adv7533_attach_dsi(adv7511);
1316                 if (ret)
1317                         goto err_unregister_audio;
1318         }
1319
1320         return 0;
1321
1322 err_unregister_audio:
1323         adv7511_audio_exit(adv7511);
1324         drm_bridge_remove(&adv7511->bridge);
1325 err_unregister_cec:
1326         cec_unregister_adapter(adv7511->cec_adap);
1327         i2c_unregister_device(adv7511->i2c_cec);
1328         clk_disable_unprepare(adv7511->cec_clk);
1329 err_i2c_unregister_packet:
1330         i2c_unregister_device(adv7511->i2c_packet);
1331 err_i2c_unregister_edid:
1332         i2c_unregister_device(adv7511->i2c_edid);
1333 uninit_regulators:
1334         adv7511_uninit_regulators(adv7511);
1335
1336         return ret;
1337 }
1338
1339 static void adv7511_remove(struct i2c_client *i2c)
1340 {
1341         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1342
1343         adv7511_uninit_regulators(adv7511);
1344
1345         drm_bridge_remove(&adv7511->bridge);
1346
1347         adv7511_audio_exit(adv7511);
1348
1349         cec_unregister_adapter(adv7511->cec_adap);
1350         i2c_unregister_device(adv7511->i2c_cec);
1351         clk_disable_unprepare(adv7511->cec_clk);
1352
1353         i2c_unregister_device(adv7511->i2c_packet);
1354         i2c_unregister_device(adv7511->i2c_edid);
1355 }
1356
1357 static const struct i2c_device_id adv7511_i2c_ids[] = {
1358         { "adv7511", ADV7511 },
1359         { "adv7511w", ADV7511 },
1360         { "adv7513", ADV7511 },
1361         { "adv7533", ADV7533 },
1362         { "adv7535", ADV7535 },
1363         { }
1364 };
1365 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
1366
1367 static const struct of_device_id adv7511_of_ids[] = {
1368         { .compatible = "adi,adv7511", .data = (void *)ADV7511 },
1369         { .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
1370         { .compatible = "adi,adv7513", .data = (void *)ADV7511 },
1371         { .compatible = "adi,adv7533", .data = (void *)ADV7533 },
1372         { .compatible = "adi,adv7535", .data = (void *)ADV7535 },
1373         { }
1374 };
1375 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
1376
1377 static struct mipi_dsi_driver adv7533_dsi_driver = {
1378         .driver.name = "adv7533",
1379 };
1380
1381 static struct i2c_driver adv7511_driver = {
1382         .driver = {
1383                 .name = "adv7511",
1384                 .of_match_table = adv7511_of_ids,
1385         },
1386         .id_table = adv7511_i2c_ids,
1387         .probe = adv7511_probe,
1388         .remove = adv7511_remove,
1389 };
1390
1391 static int __init adv7511_init(void)
1392 {
1393         int ret;
1394
1395         if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
1396                 ret = mipi_dsi_driver_register(&adv7533_dsi_driver);
1397                 if (ret)
1398                         return ret;
1399         }
1400
1401         ret = i2c_add_driver(&adv7511_driver);
1402         if (ret) {
1403                 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1404                         mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1405         }
1406
1407         return ret;
1408 }
1409 module_init(adv7511_init);
1410
1411 static void __exit adv7511_exit(void)
1412 {
1413         i2c_del_driver(&adv7511_driver);
1414
1415         if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1416                 mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1417 }
1418 module_exit(adv7511_exit);
1419
1420 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1421 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1422 MODULE_LICENSE("GPL");