drivers/gpu/drm/i2c/adv7511.c

   1 /*
   2  * Analog Devices ADV7511 HDMI transmitter driver
   3  *
   4  * Copyright 2012 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2.
   7  */
   8
   9 #include <linux/device.h>
  10 #include <linux/gpio/consumer.h>
  11 #include <linux/i2c.h>
  12 #include <linux/module.h>
  13 #include <linux/regmap.h>
  14 #include <linux/slab.h>
  15
  16 #include <drm/drmP.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_edid.h>
  19 #include <drm/drm_encoder_slave.h>
  20
  21 #include "adv7511.h"
  22
  23 struct adv7511 {
  24         struct i2c_client *i2c_main;
  25         struct i2c_client *i2c_edid;
  26
  27         struct regmap *regmap;
  28         struct regmap *packet_memory_regmap;
  29         enum drm_connector_status status;
  30         bool powered;
  31
  32         unsigned int f_tmds;
  33
  34         unsigned int current_edid_segment;
  35         uint8_t edid_buf[256];
  36         bool edid_read;
  37
  38         wait_queue_head_t wq;
  39         struct drm_encoder *encoder;
  40
  41         bool embedded_sync;
  42         enum adv7511_sync_polarity vsync_polarity;
  43         enum adv7511_sync_polarity hsync_polarity;
  44         bool rgb;
  45
  46         struct edid *edid;
  47
  48         struct gpio_desc *gpio_pd;
  49 };
  50
  51 static struct adv7511 *encoder_to_adv7511(struct drm_encoder *encoder)
  52 {
  53         return to_encoder_slave(encoder)->slave_priv;
  54 }
  55
  56 /* ADI recommended values for proper operation. */
  57 static const struct reg_sequence adv7511_fixed_registers[] = {
  58         { 0x98, 0x03 },
  59         { 0x9a, 0xe0 },
  60         { 0x9c, 0x30 },
  61         { 0x9d, 0x61 },
  62         { 0xa2, 0xa4 },
  63         { 0xa3, 0xa4 },
  64         { 0xe0, 0xd0 },
  65         { 0xf9, 0x00 },
  66         { 0x55, 0x02 },
  67 };
  68
  69 /* -----------------------------------------------------------------------------
  70  * Register access
  71  */
  72
  73 static const uint8_t adv7511_register_defaults[] = {
  74         0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
  75         0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
  76         0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
  77         0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
  78         0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
  79         0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
  80         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
  81         0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
  82         0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
  83         0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
  84         0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
  85         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  86         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
  87         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  88         0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
  89         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  90         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
  91         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  92         0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
  93         0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
  94         0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
  95         0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
  96         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
  97         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  98         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
  99         0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
 100         0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
 101         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
 102         0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
 103         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 104         0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
 105         0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 106 };
 107
 108 static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
 109 {
 110         switch (reg) {
 111         case ADV7511_REG_CHIP_REVISION:
 112         case ADV7511_REG_SPDIF_FREQ:
 113         case ADV7511_REG_CTS_AUTOMATIC1:
 114         case ADV7511_REG_CTS_AUTOMATIC2:
 115         case ADV7511_REG_VIC_DETECTED:
 116         case ADV7511_REG_VIC_SEND:
 117         case ADV7511_REG_AUX_VIC_DETECTED:
 118         case ADV7511_REG_STATUS:
 119         case ADV7511_REG_GC(1):
 120         case ADV7511_REG_INT(0):
 121         case ADV7511_REG_INT(1):
 122         case ADV7511_REG_PLL_STATUS:
 123         case ADV7511_REG_AN(0):
 124         case ADV7511_REG_AN(1):
 125         case ADV7511_REG_AN(2):
 126         case ADV7511_REG_AN(3):
 127         case ADV7511_REG_AN(4):
 128         case ADV7511_REG_AN(5):
 129         case ADV7511_REG_AN(6):
 130         case ADV7511_REG_AN(7):
 131         case ADV7511_REG_HDCP_STATUS:
 132         case ADV7511_REG_BCAPS:
 133         case ADV7511_REG_BKSV(0):
 134         case ADV7511_REG_BKSV(1):
 135         case ADV7511_REG_BKSV(2):
 136         case ADV7511_REG_BKSV(3):
 137         case ADV7511_REG_BKSV(4):
 138         case ADV7511_REG_DDC_STATUS:
 139         case ADV7511_REG_BSTATUS(0):
 140         case ADV7511_REG_BSTATUS(1):
 141         case ADV7511_REG_CHIP_ID_HIGH:
 142         case ADV7511_REG_CHIP_ID_LOW:
 143                 return true;
 144         }
 145
 146         return false;
 147 }
 148
 149 static const struct regmap_config adv7511_regmap_config = {
 150         .reg_bits = 8,
 151         .val_bits = 8,
 152
 153         .max_register = 0xff,
 154         .cache_type = REGCACHE_RBTREE,
 155         .reg_defaults_raw = adv7511_register_defaults,
 156         .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
 157
 158         .volatile_reg = adv7511_register_volatile,
 159 };
 160
 161 /* -----------------------------------------------------------------------------
 162  * Hardware configuration
 163  */
 164
 165 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
 166                                  const uint16_t *coeff,
 167                                  unsigned int scaling_factor)
 168 {
 169         unsigned int i;
 170
 171         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 172                            ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
 173
 174         if (enable) {
 175                 for (i = 0; i < 12; ++i) {
 176                         regmap_update_bits(adv7511->regmap,
 177                                            ADV7511_REG_CSC_UPPER(i),
 178                                            0x1f, coeff[i] >> 8);
 179                         regmap_write(adv7511->regmap,
 180                                      ADV7511_REG_CSC_LOWER(i),
 181                                      coeff[i] & 0xff);
 182                 }
 183         }
 184
 185         if (enable)
 186                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 187                                    0xe0, 0x80 | (scaling_factor << 5));
 188         else
 189                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 190                                    0x80, 0x00);
 191
 192         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 193                            ADV7511_CSC_UPDATE_MODE, 0);
 194 }
 195
 196 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 197 {
 198         if (packet & 0xff)
 199                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 200                                    packet, 0xff);
 201
 202         if (packet & 0xff00) {
 203                 packet >>= 8;
 204                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 205                                    packet, 0xff);
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
 212 {
 213         if (packet & 0xff)
 214                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 215                                    packet, 0x00);
 216
 217         if (packet & 0xff00) {
 218                 packet >>= 8;
 219                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 220                                    packet, 0x00);
 221         }
 222
 223         return 0;
 224 }
 225
 226 /* Coefficients for adv7511 color space conversion */
 227 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
 228         0x0734, 0x04ad, 0x0000, 0x1c1b,
 229         0x1ddc, 0x04ad, 0x1f24, 0x0135,
 230         0x0000, 0x04ad, 0x087c, 0x1b77,
 231 };
 232
 233 static void adv7511_set_config_csc(struct adv7511 *adv7511,
 234                                    struct drm_connector *connector,
 235                                    bool rgb)
 236 {
 237         struct adv7511_video_config config;
 238         bool output_format_422, output_format_ycbcr;
 239         unsigned int mode;
 240         uint8_t infoframe[17];
 241
 242         if (adv7511->edid)
 243                 config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
 244         else
 245                 config.hdmi_mode = false;
 246
 247         hdmi_avi_infoframe_init(&config.avi_infoframe);
 248
 249         config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
 250
 251         if (rgb) {
 252                 config.csc_enable = false;
 253                 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 254         } else {
 255                 config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
 256                 config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
 257
 258                 if ((connector->display_info.color_formats &
 259                      DRM_COLOR_FORMAT_YCRCB422) &&
 260                     config.hdmi_mode) {
 261                         config.csc_enable = false;
 262                         config.avi_infoframe.colorspace =
 263                                 HDMI_COLORSPACE_YUV422;
 264                 } else {
 265                         config.csc_enable = true;
 266                         config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 267                 }
 268         }
 269
 270         if (config.hdmi_mode) {
 271                 mode = ADV7511_HDMI_CFG_MODE_HDMI;
 272
 273                 switch (config.avi_infoframe.colorspace) {
 274                 case HDMI_COLORSPACE_YUV444:
 275                         output_format_422 = false;
 276                         output_format_ycbcr = true;
 277                         break;
 278                 case HDMI_COLORSPACE_YUV422:
 279                         output_format_422 = true;
 280                         output_format_ycbcr = true;
 281                         break;
 282                 default:
 283                         output_format_422 = false;
 284                         output_format_ycbcr = false;
 285                         break;
 286                 }
 287         } else {
 288                 mode = ADV7511_HDMI_CFG_MODE_DVI;
 289                 output_format_422 = false;
 290                 output_format_ycbcr = false;
 291         }
 292
 293         adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 294
 295         adv7511_set_colormap(adv7511, config.csc_enable,
 296                              config.csc_coefficents,
 297                              config.csc_scaling_factor);
 298
 299         regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
 300                            (output_format_422 << 7) | output_format_ycbcr);
 301
 302         regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
 303                            ADV7511_HDMI_CFG_MODE_MASK, mode);
 304
 305         hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
 306                                 sizeof(infoframe));
 307
 308         /* The AVI infoframe id is not configurable */
 309         regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
 310                           infoframe + 1, sizeof(infoframe) - 1);
 311
 312         adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 313 }
 314
 315 static void adv7511_set_link_config(struct adv7511 *adv7511,
 316                                     const struct adv7511_link_config *config)
 317 {
 318         /*
 319          * The input style values documented in the datasheet don't match the
 320          * hardware register field values :-(
 321          */
 322         static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
 323
 324         unsigned int clock_delay;
 325         unsigned int color_depth;
 326         unsigned int input_id;
 327
 328         clock_delay = (config->clock_delay + 1200) / 400;
 329         color_depth = config->input_color_depth == 8 ? 3
 330                     : (config->input_color_depth == 10 ? 1 : 2);
 331
 332         /* TODO Support input ID 6 */
 333         if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
 334                 input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
 335                          ? 5 : 0;
 336         else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
 337                 input_id = config->embedded_sync ? 8 : 7;
 338         else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
 339                 input_id = config->embedded_sync ? 4 : 3;
 340         else
 341                 input_id = config->embedded_sync ? 2 : 1;
 342
 343         regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
 344                            input_id);
 345         regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
 346                            (color_depth << 4) |
 347                            (input_styles[config->input_style] << 2));
 348         regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
 349                      config->input_justification << 3);
 350         regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
 351                      config->sync_pulse << 2);
 352
 353         regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
 354
 355         adv7511->embedded_sync = config->embedded_sync;
 356         adv7511->hsync_polarity = config->hsync_polarity;
 357         adv7511->vsync_polarity = config->vsync_polarity;
 358         adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
 359 }
 360
 361 static void adv7511_power_on(struct adv7511 *adv7511)
 362 {
 363         adv7511->current_edid_segment = -1;
 364
 365         regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 366                      ADV7511_INT0_EDID_READY);
 367         regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
 368                      ADV7511_INT1_DDC_ERROR);
 369         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 370                            ADV7511_POWER_POWER_DOWN, 0);
 371
 372         /*
 373          * Per spec it is allowed to pulse the HDP signal to indicate that the
 374          * EDID information has changed. Some monitors do this when they wakeup
 375          * from standby or are enabled. When the HDP goes low the adv7511 is
 376          * reset and the outputs are disabled which might cause the monitor to
 377          * go to standby again. To avoid this we ignore the HDP pin for the
 378          * first few seconds after enabling the output.
 379          */
 380         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 381                            ADV7511_REG_POWER2_HDP_SRC_MASK,
 382                            ADV7511_REG_POWER2_HDP_SRC_NONE);
 383
 384         /*
 385          * Most of the registers are reset during power down or when HPD is low.
 386          */
 387         regcache_sync(adv7511->regmap);
 388
 389         adv7511->powered = true;
 390 }
 391
 392 static void adv7511_power_off(struct adv7511 *adv7511)
 393 {
 394         /* TODO: setup additional power down modes */
 395         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 396                            ADV7511_POWER_POWER_DOWN,
 397                            ADV7511_POWER_POWER_DOWN);
 398         regcache_mark_dirty(adv7511->regmap);
 399
 400         adv7511->powered = false;
 401 }
 402
 403 /* -----------------------------------------------------------------------------
 404  * Interrupt and hotplug detection
 405  */
 406
 407 static bool adv7511_hpd(struct adv7511 *adv7511)
 408 {
 409         unsigned int irq0;
 410         int ret;
 411
 412         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 413         if (ret < 0)
 414                 return false;
 415
 416         if (irq0 & ADV7511_INT0_HDP) {
 417                 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 418                              ADV7511_INT0_HDP);
 419                 return true;
 420         }
 421
 422         return false;
 423 }
 424
 425 static int adv7511_irq_process(struct adv7511 *adv7511)
 426 {
 427         unsigned int irq0, irq1;
 428         int ret;
 429
 430         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 431         if (ret < 0)
 432                 return ret;
 433
 434         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
 435         if (ret < 0)
 436                 return ret;
 437
 438         regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 439         regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 440
 441         if (irq0 & ADV7511_INT0_HDP && adv7511->encoder)
 442                 drm_helper_hpd_irq_event(adv7511->encoder->dev);
 443
 444         if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 445                 adv7511->edid_read = true;
 446
 447                 if (adv7511->i2c_main->irq)
 448                         wake_up_all(&adv7511->wq);
 449         }
 450
 451         return 0;
 452 }
 453
 454 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
 455 {
 456         struct adv7511 *adv7511 = devid;
 457         int ret;
 458
 459         ret = adv7511_irq_process(adv7511);
 460         return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
 461 }
 462
 463 /* -----------------------------------------------------------------------------
 464  * EDID retrieval
 465  */
 466
 467 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
 468 {
 469         int ret;
 470
 471         if (adv7511->i2c_main->irq) {
 472                 ret = wait_event_interruptible_timeout(adv7511->wq,
 473                                 adv7511->edid_read, msecs_to_jiffies(timeout));
 474         } else {
 475                 for (; timeout > 0; timeout -= 25) {
 476                         ret = adv7511_irq_process(adv7511);
 477                         if (ret < 0)
 478                                 break;
 479
 480                         if (adv7511->edid_read)
 481                                 break;
 482
 483                         msleep(25);
 484                 }
 485         }
 486
 487         return adv7511->edid_read ? 0 : -EIO;
 488 }
 489
 490 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
 491                                   size_t len)
 492 {
 493         struct adv7511 *adv7511 = data;
 494         struct i2c_msg xfer[2];
 495         uint8_t offset;
 496         unsigned int i;
 497         int ret;
 498
 499         if (len > 128)
 500                 return -EINVAL;
 501
 502         if (adv7511->current_edid_segment != block / 2) {
 503                 unsigned int status;
 504
 505                 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
 506                                   &status);
 507                 if (ret < 0)
 508                         return ret;
 509
 510                 if (status != 2) {
 511                         adv7511->edid_read = false;
 512                         regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
 513                                      block);
 514                         ret = adv7511_wait_for_edid(adv7511, 200);
 515                         if (ret < 0)
 516                                 return ret;
 517                 }
 518
 519                 /* Break this apart, hopefully more I2C controllers will
 520                  * support 64 byte transfers than 256 byte transfers
 521                  */
 522
 523                 xfer[0].addr = adv7511->i2c_edid->addr;
 524                 xfer[0].flags = 0;
 525                 xfer[0].len = 1;
 526                 xfer[0].buf = &offset;
 527                 xfer[1].addr = adv7511->i2c_edid->addr;
 528                 xfer[1].flags = I2C_M_RD;
 529                 xfer[1].len = 64;
 530                 xfer[1].buf = adv7511->edid_buf;
 531
 532                 offset = 0;
 533
 534                 for (i = 0; i < 4; ++i) {
 535                         ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
 536                                            ARRAY_SIZE(xfer));
 537                         if (ret < 0)
 538                                 return ret;
 539                         else if (ret != 2)
 540                                 return -EIO;
 541
 542                         xfer[1].buf += 64;
 543                         offset += 64;
 544                 }
 545
 546                 adv7511->current_edid_segment = block / 2;
 547         }
 548
 549         if (block % 2 == 0)
 550                 memcpy(buf, adv7511->edid_buf, len);
 551         else
 552                 memcpy(buf, adv7511->edid_buf + 128, len);
 553
 554         return 0;
 555 }
 556
 557 /* -----------------------------------------------------------------------------
 558  * Encoder operations
 559  */
 560
 561 static int adv7511_get_modes(struct drm_encoder *encoder,
 562                              struct drm_connector *connector)
 563 {
 564         struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 565         struct edid *edid;
 566         unsigned int count;
 567
 568         /* Reading the EDID only works if the device is powered */
 569         if (!adv7511->powered) {
 570                 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 571                              ADV7511_INT0_EDID_READY);
 572                 regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
 573                              ADV7511_INT1_DDC_ERROR);
 574                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 575                                    ADV7511_POWER_POWER_DOWN, 0);
 576                 adv7511->current_edid_segment = -1;
 577         }
 578
 579         edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
 580
 581         if (!adv7511->powered)
 582                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 583                                    ADV7511_POWER_POWER_DOWN,
 584                                    ADV7511_POWER_POWER_DOWN);
 585
 586         kfree(adv7511->edid);
 587         adv7511->edid = edid;
 588         if (!edid)
 589                 return 0;
 590
 591         drm_mode_connector_update_edid_property(connector, edid);
 592         count = drm_add_edid_modes(connector, edid);
 593
 594         adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
 595
 596         return count;
 597 }
 598
 599 static void adv7511_encoder_dpms(struct drm_encoder *encoder, int mode)
 600 {
 601         struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 602
 603         if (mode == DRM_MODE_DPMS_ON)
 604                 adv7511_power_on(adv7511);
 605         else
 606                 adv7511_power_off(adv7511);
 607 }
 608
 609 static enum drm_connector_status
 610 adv7511_encoder_detect(struct drm_encoder *encoder,
 611                        struct drm_connector *connector)
 612 {
 613         struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 614         enum drm_connector_status status;
 615         unsigned int val;
 616         bool hpd;
 617         int ret;
 618
 619         ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 620         if (ret < 0)
 621                 return connector_status_disconnected;
 622
 623         if (val & ADV7511_STATUS_HPD)
 624                 status = connector_status_connected;
 625         else
 626                 status = connector_status_disconnected;
 627
 628         hpd = adv7511_hpd(adv7511);
 629
 630         /* The chip resets itself when the cable is disconnected, so in case
 631          * there is a pending HPD interrupt and the cable is connected there was
 632          * at least one transition from disconnected to connected and the chip
 633          * has to be reinitialized. */
 634         if (status == connector_status_connected && hpd && adv7511->powered) {
 635                 regcache_mark_dirty(adv7511->regmap);
 636                 adv7511_power_on(adv7511);
 637                 adv7511_get_modes(encoder, connector);
 638                 if (adv7511->status == connector_status_connected)
 639                         status = connector_status_disconnected;
 640         } else {
 641                 /* Renable HDP sensing */
 642                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 643                                    ADV7511_REG_POWER2_HDP_SRC_MASK,
 644                                    ADV7511_REG_POWER2_HDP_SRC_BOTH);
 645         }
 646
 647         adv7511->status = status;
 648         return status;
 649 }
 650
 651 static int adv7511_encoder_mode_valid(struct drm_encoder *encoder,
 652                                       struct drm_display_mode *mode)
 653 {
 654         if (mode->clock > 165000)
 655                 return MODE_CLOCK_HIGH;
 656
 657         return MODE_OK;
 658 }
 659
 660 static void adv7511_encoder_mode_set(struct drm_encoder *encoder,
 661                                      struct drm_display_mode *mode,
 662                                      struct drm_display_mode *adj_mode)
 663 {
 664         struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 665         unsigned int low_refresh_rate;
 666         unsigned int hsync_polarity = 0;
 667         unsigned int vsync_polarity = 0;
 668
 669         if (adv7511->embedded_sync) {
 670                 unsigned int hsync_offset, hsync_len;
 671                 unsigned int vsync_offset, vsync_len;
 672
 673                 hsync_offset = adj_mode->crtc_hsync_start -
 674                                adj_mode->crtc_hdisplay;
 675                 vsync_offset = adj_mode->crtc_vsync_start -
 676                                adj_mode->crtc_vdisplay;
 677                 hsync_len = adj_mode->crtc_hsync_end -
 678                             adj_mode->crtc_hsync_start;
 679                 vsync_len = adj_mode->crtc_vsync_end -
 680                             adj_mode->crtc_vsync_start;
 681
 682                 /* The hardware vsync generator has a off-by-one bug */
 683                 vsync_offset += 1;
 684
 685                 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
 686                              ((hsync_offset >> 10) & 0x7) << 5);
 687                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
 688                              (hsync_offset >> 2) & 0xff);
 689                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
 690                              ((hsync_offset & 0x3) << 6) |
 691                              ((hsync_len >> 4) & 0x3f));
 692                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
 693                              ((hsync_len & 0xf) << 4) |
 694                              ((vsync_offset >> 6) & 0xf));
 695                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
 696                              ((vsync_offset & 0x3f) << 2) |
 697                              ((vsync_len >> 8) & 0x3));
 698                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
 699                              vsync_len & 0xff);
 700
 701                 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
 702                 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
 703         } else {
 704                 enum adv7511_sync_polarity mode_hsync_polarity;
 705                 enum adv7511_sync_polarity mode_vsync_polarity;
 706
 707                 /**
 708                  * If the input signal is always low or always high we want to
 709                  * invert or let it passthrough depending on the polarity of the
 710                  * current mode.
 711                  **/
 712                 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
 713                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 714                 else
 715                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 716
 717                 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
 718                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 719                 else
 720                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 721
 722                 if (adv7511->hsync_polarity != mode_hsync_polarity &&
 723                     adv7511->hsync_polarity !=
 724                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 725                         hsync_polarity = 1;
 726
 727                 if (adv7511->vsync_polarity != mode_vsync_polarity &&
 728                     adv7511->vsync_polarity !=
 729                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 730                         vsync_polarity = 1;
 731         }
 732
 733         if (mode->vrefresh <= 24000)
 734                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
 735         else if (mode->vrefresh <= 25000)
 736                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
 737         else if (mode->vrefresh <= 30000)
 738                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
 739         else
 740                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 741
 742         regmap_update_bits(adv7511->regmap, 0xfb,
 743                 0x6, low_refresh_rate << 1);
 744         regmap_update_bits(adv7511->regmap, 0x17,
 745                 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 746
 747         /*
 748          * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 749          * supposed to give better results.
 750          */
 751
 752         adv7511->f_tmds = mode->clock;
 753 }
 754
 755 static struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
 756         .dpms = adv7511_encoder_dpms,
 757         .mode_valid = adv7511_encoder_mode_valid,
 758         .mode_set = adv7511_encoder_mode_set,
 759         .detect = adv7511_encoder_detect,
 760         .get_modes = adv7511_get_modes,
 761 };
 762
 763 /* -----------------------------------------------------------------------------
 764  * Probe & remove
 765  */
 766
 767 static int adv7511_parse_dt(struct device_node *np,
 768                             struct adv7511_link_config *config)
 769 {
 770         const char *str;
 771         int ret;
 772
 773         memset(config, 0, sizeof(*config));
 774
 775         of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
 776         if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
 777             config->input_color_depth != 12)
 778                 return -EINVAL;
 779
 780         ret = of_property_read_string(np, "adi,input-colorspace", &str);
 781         if (ret < 0)
 782                 return ret;
 783
 784         if (!strcmp(str, "rgb"))
 785                 config->input_colorspace = HDMI_COLORSPACE_RGB;
 786         else if (!strcmp(str, "yuv422"))
 787                 config->input_colorspace = HDMI_COLORSPACE_YUV422;
 788         else if (!strcmp(str, "yuv444"))
 789                 config->input_colorspace = HDMI_COLORSPACE_YUV444;
 790         else
 791                 return -EINVAL;
 792
 793         ret = of_property_read_string(np, "adi,input-clock", &str);
 794         if (ret < 0)
 795                 return ret;
 796
 797         if (!strcmp(str, "1x"))
 798                 config->input_clock = ADV7511_INPUT_CLOCK_1X;
 799         else if (!strcmp(str, "2x"))
 800                 config->input_clock = ADV7511_INPUT_CLOCK_2X;
 801         else if (!strcmp(str, "ddr"))
 802                 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
 803         else
 804                 return -EINVAL;
 805
 806         if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
 807             config->input_clock != ADV7511_INPUT_CLOCK_1X) {
 808                 ret = of_property_read_u32(np, "adi,input-style",
 809                                            &config->input_style);
 810                 if (ret)
 811                         return ret;
 812
 813                 if (config->input_style < 1 || config->input_style > 3)
 814                         return -EINVAL;
 815
 816                 ret = of_property_read_string(np, "adi,input-justification",
 817                                               &str);
 818                 if (ret < 0)
 819                         return ret;
 820
 821                 if (!strcmp(str, "left"))
 822                         config->input_justification =
 823                                 ADV7511_INPUT_JUSTIFICATION_LEFT;
 824                 else if (!strcmp(str, "evenly"))
 825                         config->input_justification =
 826                                 ADV7511_INPUT_JUSTIFICATION_EVENLY;
 827                 else if (!strcmp(str, "right"))
 828                         config->input_justification =
 829                                 ADV7511_INPUT_JUSTIFICATION_RIGHT;
 830                 else
 831                         return -EINVAL;
 832
 833         } else {
 834                 config->input_style = 1;
 835                 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
 836         }
 837
 838         of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
 839         if (config->clock_delay < -1200 || config->clock_delay > 1600)
 840                 return -EINVAL;
 841
 842         config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
 843
 844         /* Hardcode the sync pulse configurations for now. */
 845         config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
 846         config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 847         config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 848
 849         return 0;
 850 }
 851
 852 static const int edid_i2c_addr = 0x7e;
 853 static const int packet_i2c_addr = 0x70;
 854 static const int cec_i2c_addr = 0x78;
 855
 856 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 857 {
 858         struct adv7511_link_config link_config;
 859         struct adv7511 *adv7511;
 860         struct device *dev = &i2c->dev;
 861         unsigned int val;
 862         int ret;
 863
 864         if (!dev->of_node)
 865                 return -EINVAL;
 866
 867         adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
 868         if (!adv7511)
 869                 return -ENOMEM;
 870
 871         adv7511->powered = false;
 872         adv7511->status = connector_status_disconnected;
 873
 874         ret = adv7511_parse_dt(dev->of_node, &link_config);
 875         if (ret)
 876                 return ret;
 877
 878         /*
 879          * The power down GPIO is optional. If present, toggle it from active to
 880          * inactive to wake up the encoder.
 881          */
 882         adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
 883         if (IS_ERR(adv7511->gpio_pd))
 884                 return PTR_ERR(adv7511->gpio_pd);
 885
 886         if (adv7511->gpio_pd) {
 887                 mdelay(5);
 888                 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
 889         }
 890
 891         adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
 892         if (IS_ERR(adv7511->regmap))
 893                 return PTR_ERR(adv7511->regmap);
 894
 895         ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
 896         if (ret)
 897                 return ret;
 898         dev_dbg(dev, "Rev. %d\n", val);
 899
 900         ret = regmap_register_patch(adv7511->regmap, adv7511_fixed_registers,
 901                                     ARRAY_SIZE(adv7511_fixed_registers));
 902         if (ret)
 903                 return ret;
 904
 905         regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
 906         regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
 907                      packet_i2c_addr);
 908         regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr);
 909         adv7511_packet_disable(adv7511, 0xffff);
 910
 911         adv7511->i2c_main = i2c;
 912         adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
 913         if (!adv7511->i2c_edid)
 914                 return -ENOMEM;
 915
 916         if (i2c->irq) {
 917                 init_waitqueue_head(&adv7511->wq);
 918
 919                 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
 920                                                 adv7511_irq_handler,
 921                                                 IRQF_ONESHOT, dev_name(dev),
 922                                                 adv7511);
 923                 if (ret)
 924                         goto err_i2c_unregister_device;
 925         }
 926
 927         /* CEC is unused for now */
 928         regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
 929                      ADV7511_CEC_CTRL_POWER_DOWN);
 930
 931         adv7511_power_off(adv7511);
 932
 933         i2c_set_clientdata(i2c, adv7511);
 934
 935         adv7511_set_link_config(adv7511, &link_config);
 936
 937         return 0;
 938
 939 err_i2c_unregister_device:
 940         i2c_unregister_device(adv7511->i2c_edid);
 941
 942         return ret;
 943 }
 944
 945 static int adv7511_remove(struct i2c_client *i2c)
 946 {
 947         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
 948
 949         i2c_unregister_device(adv7511->i2c_edid);
 950
 951         kfree(adv7511->edid);
 952
 953         return 0;
 954 }
 955
 956 static int adv7511_encoder_init(struct i2c_client *i2c, struct drm_device *dev,
 957                                 struct drm_encoder_slave *encoder)
 958 {
 959
 960         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
 961
 962         encoder->slave_priv = adv7511;
 963         encoder->slave_funcs = &adv7511_encoder_funcs;
 964
 965         adv7511->encoder = &encoder->base;
 966
 967         return 0;
 968 }
 969
 970 static const struct i2c_device_id adv7511_i2c_ids[] = {
 971         { "adv7511", 0 },
 972         { "adv7511w", 0 },
 973         { "adv7513", 0 },
 974         { }
 975 };
 976 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
 977
 978 static const struct of_device_id adv7511_of_ids[] = {
 979         { .compatible = "adi,adv7511", },
 980         { .compatible = "adi,adv7511w", },
 981         { .compatible = "adi,adv7513", },
 982         { }
 983 };
 984 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
 985
 986 static struct drm_i2c_encoder_driver adv7511_driver = {
 987         .i2c_driver = {
 988                 .driver = {
 989                         .name = "adv7511",
 990                         .of_match_table = adv7511_of_ids,
 991                 },
 992                 .id_table = adv7511_i2c_ids,
 993                 .probe = adv7511_probe,
 994                 .remove = adv7511_remove,
 995         },
 996
 997         .encoder_init = adv7511_encoder_init,
 998 };
 999
1000 static int __init adv7511_init(void)
1001 {
1002         return drm_i2c_encoder_register(THIS_MODULE, &adv7511_driver);
1003 }
1004 module_init(adv7511_init);
1005
1006 static void __exit adv7511_exit(void)
1007 {
1008         drm_i2c_encoder_unregister(&adv7511_driver);
1009 }
1010 module_exit(adv7511_exit);
1011
1012 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1013 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1014 MODULE_LICENSE("GPL");