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

   1 /*
   2  * Analog Devices ADV7511 HDMI transmitter driver
   3  *
   4  * Copyright 2012 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2.
   7  */
   8
   9 #include <linux/device.h>
  10 #include <linux/gpio/consumer.h>
  11 #include <linux/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_atomic.h>
  18 #include <drm/drm_atomic_helper.h>
  19 #include <drm/drm_crtc_helper.h>
  20 #include <drm/drm_edid.h>
  21
  22 #include "adv7511.h"
  23
  24 struct adv7511 {
  25         struct i2c_client *i2c_main;
  26         struct i2c_client *i2c_edid;
  27
  28         struct regmap *regmap;
  29         struct regmap *packet_memory_regmap;
  30         enum drm_connector_status status;
  31         bool powered;
  32
  33         unsigned int f_tmds;
  34
  35         unsigned int current_edid_segment;
  36         uint8_t edid_buf[256];
  37         bool edid_read;
  38
  39         wait_queue_head_t wq;
  40         struct drm_bridge bridge;
  41         struct drm_connector connector;
  42
  43         bool embedded_sync;
  44         enum adv7511_sync_polarity vsync_polarity;
  45         enum adv7511_sync_polarity hsync_polarity;
  46         bool rgb;
  47
  48         struct edid *edid;
  49
  50         struct gpio_desc *gpio_pd;
  51 };
  52
  53 /* ADI recommended values for proper operation. */
  54 static const struct reg_sequence adv7511_fixed_registers[] = {
  55         { 0x98, 0x03 },
  56         { 0x9a, 0xe0 },
  57         { 0x9c, 0x30 },
  58         { 0x9d, 0x61 },
  59         { 0xa2, 0xa4 },
  60         { 0xa3, 0xa4 },
  61         { 0xe0, 0xd0 },
  62         { 0xf9, 0x00 },
  63         { 0x55, 0x02 },
  64 };
  65
  66 /* -----------------------------------------------------------------------------
  67  * Register access
  68  */
  69
  70 static const uint8_t adv7511_register_defaults[] = {
  71         0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
  72         0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
  73         0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
  74         0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
  75         0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
  76         0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
  77         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
  78         0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
  79         0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
  80         0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
  81         0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
  82         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  83         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
  84         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  85         0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
  86         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  87         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
  88         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  89         0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
  90         0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
  91         0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
  92         0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
  93         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
  94         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  95         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
  96         0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
  97         0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
  98         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
  99         0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
 100         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 101         0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
 102         0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 103 };
 104
 105 static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
 106 {
 107         switch (reg) {
 108         case ADV7511_REG_CHIP_REVISION:
 109         case ADV7511_REG_SPDIF_FREQ:
 110         case ADV7511_REG_CTS_AUTOMATIC1:
 111         case ADV7511_REG_CTS_AUTOMATIC2:
 112         case ADV7511_REG_VIC_DETECTED:
 113         case ADV7511_REG_VIC_SEND:
 114         case ADV7511_REG_AUX_VIC_DETECTED:
 115         case ADV7511_REG_STATUS:
 116         case ADV7511_REG_GC(1):
 117         case ADV7511_REG_INT(0):
 118         case ADV7511_REG_INT(1):
 119         case ADV7511_REG_PLL_STATUS:
 120         case ADV7511_REG_AN(0):
 121         case ADV7511_REG_AN(1):
 122         case ADV7511_REG_AN(2):
 123         case ADV7511_REG_AN(3):
 124         case ADV7511_REG_AN(4):
 125         case ADV7511_REG_AN(5):
 126         case ADV7511_REG_AN(6):
 127         case ADV7511_REG_AN(7):
 128         case ADV7511_REG_HDCP_STATUS:
 129         case ADV7511_REG_BCAPS:
 130         case ADV7511_REG_BKSV(0):
 131         case ADV7511_REG_BKSV(1):
 132         case ADV7511_REG_BKSV(2):
 133         case ADV7511_REG_BKSV(3):
 134         case ADV7511_REG_BKSV(4):
 135         case ADV7511_REG_DDC_STATUS:
 136         case ADV7511_REG_EDID_READ_CTRL:
 137         case ADV7511_REG_BSTATUS(0):
 138         case ADV7511_REG_BSTATUS(1):
 139         case ADV7511_REG_CHIP_ID_HIGH:
 140         case ADV7511_REG_CHIP_ID_LOW:
 141                 return true;
 142         }
 143
 144         return false;
 145 }
 146
 147 static const struct regmap_config adv7511_regmap_config = {
 148         .reg_bits = 8,
 149         .val_bits = 8,
 150
 151         .max_register = 0xff,
 152         .cache_type = REGCACHE_RBTREE,
 153         .reg_defaults_raw = adv7511_register_defaults,
 154         .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
 155
 156         .volatile_reg = adv7511_register_volatile,
 157 };
 158
 159 /* -----------------------------------------------------------------------------
 160  * Hardware configuration
 161  */
 162
 163 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
 164                                  const uint16_t *coeff,
 165                                  unsigned int scaling_factor)
 166 {
 167         unsigned int i;
 168
 169         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 170                            ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
 171
 172         if (enable) {
 173                 for (i = 0; i < 12; ++i) {
 174                         regmap_update_bits(adv7511->regmap,
 175                                            ADV7511_REG_CSC_UPPER(i),
 176                                            0x1f, coeff[i] >> 8);
 177                         regmap_write(adv7511->regmap,
 178                                      ADV7511_REG_CSC_LOWER(i),
 179                                      coeff[i] & 0xff);
 180                 }
 181         }
 182
 183         if (enable)
 184                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 185                                    0xe0, 0x80 | (scaling_factor << 5));
 186         else
 187                 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 188                                    0x80, 0x00);
 189
 190         regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 191                            ADV7511_CSC_UPDATE_MODE, 0);
 192 }
 193
 194 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 195 {
 196         if (packet & 0xff)
 197                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 198                                    packet, 0xff);
 199
 200         if (packet & 0xff00) {
 201                 packet >>= 8;
 202                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 203                                    packet, 0xff);
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
 210 {
 211         if (packet & 0xff)
 212                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 213                                    packet, 0x00);
 214
 215         if (packet & 0xff00) {
 216                 packet >>= 8;
 217                 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 218                                    packet, 0x00);
 219         }
 220
 221         return 0;
 222 }
 223
 224 /* Coefficients for adv7511 color space conversion */
 225 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
 226         0x0734, 0x04ad, 0x0000, 0x1c1b,
 227         0x1ddc, 0x04ad, 0x1f24, 0x0135,
 228         0x0000, 0x04ad, 0x087c, 0x1b77,
 229 };
 230
 231 static void adv7511_set_config_csc(struct adv7511 *adv7511,
 232                                    struct drm_connector *connector,
 233                                    bool rgb)
 234 {
 235         struct adv7511_video_config config;
 236         bool output_format_422, output_format_ycbcr;
 237         unsigned int mode;
 238         uint8_t infoframe[17];
 239
 240         if (adv7511->edid)
 241                 config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
 242         else
 243                 config.hdmi_mode = false;
 244
 245         hdmi_avi_infoframe_init(&config.avi_infoframe);
 246
 247         config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
 248
 249         if (rgb) {
 250                 config.csc_enable = false;
 251                 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 252         } else {
 253                 config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
 254                 config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
 255
 256                 if ((connector->display_info.color_formats &
 257                      DRM_COLOR_FORMAT_YCRCB422) &&
 258                     config.hdmi_mode) {
 259                         config.csc_enable = false;
 260                         config.avi_infoframe.colorspace =
 261                                 HDMI_COLORSPACE_YUV422;
 262                 } else {
 263                         config.csc_enable = true;
 264                         config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 265                 }
 266         }
 267
 268         if (config.hdmi_mode) {
 269                 mode = ADV7511_HDMI_CFG_MODE_HDMI;
 270
 271                 switch (config.avi_infoframe.colorspace) {
 272                 case HDMI_COLORSPACE_YUV444:
 273                         output_format_422 = false;
 274                         output_format_ycbcr = true;
 275                         break;
 276                 case HDMI_COLORSPACE_YUV422:
 277                         output_format_422 = true;
 278                         output_format_ycbcr = true;
 279                         break;
 280                 default:
 281                         output_format_422 = false;
 282                         output_format_ycbcr = false;
 283                         break;
 284                 }
 285         } else {
 286                 mode = ADV7511_HDMI_CFG_MODE_DVI;
 287                 output_format_422 = false;
 288                 output_format_ycbcr = false;
 289         }
 290
 291         adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 292
 293         adv7511_set_colormap(adv7511, config.csc_enable,
 294                              config.csc_coefficents,
 295                              config.csc_scaling_factor);
 296
 297         regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
 298                            (output_format_422 << 7) | output_format_ycbcr);
 299
 300         regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
 301                            ADV7511_HDMI_CFG_MODE_MASK, mode);
 302
 303         hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
 304                                 sizeof(infoframe));
 305
 306         /* The AVI infoframe id is not configurable */
 307         regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
 308                           infoframe + 1, sizeof(infoframe) - 1);
 309
 310         adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 311 }
 312
 313 static void adv7511_set_link_config(struct adv7511 *adv7511,
 314                                     const struct adv7511_link_config *config)
 315 {
 316         /*
 317          * The input style values documented in the datasheet don't match the
 318          * hardware register field values :-(
 319          */
 320         static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
 321
 322         unsigned int clock_delay;
 323         unsigned int color_depth;
 324         unsigned int input_id;
 325
 326         clock_delay = (config->clock_delay + 1200) / 400;
 327         color_depth = config->input_color_depth == 8 ? 3
 328                     : (config->input_color_depth == 10 ? 1 : 2);
 329
 330         /* TODO Support input ID 6 */
 331         if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
 332                 input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
 333                          ? 5 : 0;
 334         else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
 335                 input_id = config->embedded_sync ? 8 : 7;
 336         else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
 337                 input_id = config->embedded_sync ? 4 : 3;
 338         else
 339                 input_id = config->embedded_sync ? 2 : 1;
 340
 341         regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
 342                            input_id);
 343         regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
 344                            (color_depth << 4) |
 345                            (input_styles[config->input_style] << 2));
 346         regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
 347                      config->input_justification << 3);
 348         regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
 349                      config->sync_pulse << 2);
 350
 351         regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
 352
 353         adv7511->embedded_sync = config->embedded_sync;
 354         adv7511->hsync_polarity = config->hsync_polarity;
 355         adv7511->vsync_polarity = config->vsync_polarity;
 356         adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
 357 }
 358
 359 static void adv7511_power_on(struct adv7511 *adv7511)
 360 {
 361         adv7511->current_edid_segment = -1;
 362
 363         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 364                            ADV7511_POWER_POWER_DOWN, 0);
 365         if (adv7511->i2c_main->irq) {
 366                 /*
 367                  * Documentation says the INT_ENABLE registers are reset in
 368                  * POWER_DOWN mode. My 7511w preserved the bits, however.
 369                  * Still, let's be safe and stick to the documentation.
 370                  */
 371                 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 372                              ADV7511_INT0_EDID_READY);
 373                 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
 374                              ADV7511_INT1_DDC_ERROR);
 375         }
 376
 377         /*
 378          * Per spec it is allowed to pulse the HPD signal to indicate that the
 379          * EDID information has changed. Some monitors do this when they wakeup
 380          * from standby or are enabled. When the HPD goes low the adv7511 is
 381          * reset and the outputs are disabled which might cause the monitor to
 382          * go to standby again. To avoid this we ignore the HPD pin for the
 383          * first few seconds after enabling the output.
 384          */
 385         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 386                            ADV7511_REG_POWER2_HPD_SRC_MASK,
 387                            ADV7511_REG_POWER2_HPD_SRC_NONE);
 388
 389         /*
 390          * Most of the registers are reset during power down or when HPD is low.
 391          */
 392         regcache_sync(adv7511->regmap);
 393
 394         adv7511->powered = true;
 395 }
 396
 397 static void adv7511_power_off(struct adv7511 *adv7511)
 398 {
 399         /* TODO: setup additional power down modes */
 400         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 401                            ADV7511_POWER_POWER_DOWN,
 402                            ADV7511_POWER_POWER_DOWN);
 403         regcache_mark_dirty(adv7511->regmap);
 404
 405         adv7511->powered = false;
 406 }
 407
 408 /* -----------------------------------------------------------------------------
 409  * Interrupt and hotplug detection
 410  */
 411
 412 static bool adv7511_hpd(struct adv7511 *adv7511)
 413 {
 414         unsigned int irq0;
 415         int ret;
 416
 417         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 418         if (ret < 0)
 419                 return false;
 420
 421         if (irq0 & ADV7511_INT0_HPD) {
 422                 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 423                              ADV7511_INT0_HPD);
 424                 return true;
 425         }
 426
 427         return false;
 428 }
 429
 430 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 431 {
 432         unsigned int irq0, irq1;
 433         int ret;
 434
 435         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 436         if (ret < 0)
 437                 return ret;
 438
 439         ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
 440         if (ret < 0)
 441                 return ret;
 442
 443         regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 444         regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 445
 446         if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
 447                 drm_helper_hpd_irq_event(adv7511->connector.dev);
 448
 449         if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 450                 adv7511->edid_read = true;
 451
 452                 if (adv7511->i2c_main->irq)
 453                         wake_up_all(&adv7511->wq);
 454         }
 455
 456         return 0;
 457 }
 458
 459 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
 460 {
 461         struct adv7511 *adv7511 = devid;
 462         int ret;
 463
 464         ret = adv7511_irq_process(adv7511, true);
 465         return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
 466 }
 467
 468 /* -----------------------------------------------------------------------------
 469  * EDID retrieval
 470  */
 471
 472 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
 473 {
 474         int ret;
 475
 476         if (adv7511->i2c_main->irq) {
 477                 ret = wait_event_interruptible_timeout(adv7511->wq,
 478                                 adv7511->edid_read, msecs_to_jiffies(timeout));
 479         } else {
 480                 for (; timeout > 0; timeout -= 25) {
 481                         ret = adv7511_irq_process(adv7511, false);
 482                         if (ret < 0)
 483                                 break;
 484
 485                         if (adv7511->edid_read)
 486                                 break;
 487
 488                         msleep(25);
 489                 }
 490         }
 491
 492         return adv7511->edid_read ? 0 : -EIO;
 493 }
 494
 495 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
 496                                   size_t len)
 497 {
 498         struct adv7511 *adv7511 = data;
 499         struct i2c_msg xfer[2];
 500         uint8_t offset;
 501         unsigned int i;
 502         int ret;
 503
 504         if (len > 128)
 505                 return -EINVAL;
 506
 507         if (adv7511->current_edid_segment != block / 2) {
 508                 unsigned int status;
 509
 510                 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
 511                                   &status);
 512                 if (ret < 0)
 513                         return ret;
 514
 515                 if (status != 2) {
 516                         adv7511->edid_read = false;
 517                         regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
 518                                      block);
 519                         ret = adv7511_wait_for_edid(adv7511, 200);
 520                         if (ret < 0)
 521                                 return ret;
 522                 }
 523
 524                 /* Break this apart, hopefully more I2C controllers will
 525                  * support 64 byte transfers than 256 byte transfers
 526                  */
 527
 528                 xfer[0].addr = adv7511->i2c_edid->addr;
 529                 xfer[0].flags = 0;
 530                 xfer[0].len = 1;
 531                 xfer[0].buf = &offset;
 532                 xfer[1].addr = adv7511->i2c_edid->addr;
 533                 xfer[1].flags = I2C_M_RD;
 534                 xfer[1].len = 64;
 535                 xfer[1].buf = adv7511->edid_buf;
 536
 537                 offset = 0;
 538
 539                 for (i = 0; i < 4; ++i) {
 540                         ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
 541                                            ARRAY_SIZE(xfer));
 542                         if (ret < 0)
 543                                 return ret;
 544                         else if (ret != 2)
 545                                 return -EIO;
 546
 547                         xfer[1].buf += 64;
 548                         offset += 64;
 549                 }
 550
 551                 adv7511->current_edid_segment = block / 2;
 552         }
 553
 554         if (block % 2 == 0)
 555                 memcpy(buf, adv7511->edid_buf, len);
 556         else
 557                 memcpy(buf, adv7511->edid_buf + 128, len);
 558
 559         return 0;
 560 }
 561
 562 /* -----------------------------------------------------------------------------
 563  * ADV75xx helpers
 564  */
 565
 566 static int adv7511_get_modes(struct adv7511 *adv7511,
 567                              struct drm_connector *connector)
 568 {
 569         struct edid *edid;
 570         unsigned int count;
 571
 572         /* Reading the EDID only works if the device is powered */
 573         if (!adv7511->powered) {
 574                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 575                                    ADV7511_POWER_POWER_DOWN, 0);
 576                 if (adv7511->i2c_main->irq) {
 577                         regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 578                                      ADV7511_INT0_EDID_READY);
 579                         regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
 580                                      ADV7511_INT1_DDC_ERROR);
 581                 }
 582                 adv7511->current_edid_segment = -1;
 583         }
 584
 585         edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
 586
 587         if (!adv7511->powered)
 588                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 589                                    ADV7511_POWER_POWER_DOWN,
 590                                    ADV7511_POWER_POWER_DOWN);
 591
 592         kfree(adv7511->edid);
 593         adv7511->edid = edid;
 594         if (!edid)
 595                 return 0;
 596
 597         drm_mode_connector_update_edid_property(connector, edid);
 598         count = drm_add_edid_modes(connector, edid);
 599
 600         adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
 601
 602         return count;
 603 }
 604
 605 static enum drm_connector_status
 606 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
 607 {
 608         enum drm_connector_status status;
 609         unsigned int val;
 610         bool hpd;
 611         int ret;
 612
 613         ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 614         if (ret < 0)
 615                 return connector_status_disconnected;
 616
 617         if (val & ADV7511_STATUS_HPD)
 618                 status = connector_status_connected;
 619         else
 620                 status = connector_status_disconnected;
 621
 622         hpd = adv7511_hpd(adv7511);
 623
 624         /* The chip resets itself when the cable is disconnected, so in case
 625          * there is a pending HPD interrupt and the cable is connected there was
 626          * at least one transition from disconnected to connected and the chip
 627          * has to be reinitialized. */
 628         if (status == connector_status_connected && hpd && adv7511->powered) {
 629                 regcache_mark_dirty(adv7511->regmap);
 630                 adv7511_power_on(adv7511);
 631                 adv7511_get_modes(adv7511, connector);
 632                 if (adv7511->status == connector_status_connected)
 633                         status = connector_status_disconnected;
 634         } else {
 635                 /* Renable HPD sensing */
 636                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 637                                    ADV7511_REG_POWER2_HPD_SRC_MASK,
 638                                    ADV7511_REG_POWER2_HPD_SRC_BOTH);
 639         }
 640
 641         adv7511->status = status;
 642         return status;
 643 }
 644
 645 static int adv7511_mode_valid(struct adv7511 *adv7511,
 646                               struct drm_display_mode *mode)
 647 {
 648         if (mode->clock > 165000)
 649                 return MODE_CLOCK_HIGH;
 650
 651         return MODE_OK;
 652 }
 653
 654 static void adv7511_mode_set(struct adv7511 *adv7511,
 655                              struct drm_display_mode *mode,
 656                              struct drm_display_mode *adj_mode)
 657 {
 658         unsigned int low_refresh_rate;
 659         unsigned int hsync_polarity = 0;
 660         unsigned int vsync_polarity = 0;
 661
 662         if (adv7511->embedded_sync) {
 663                 unsigned int hsync_offset, hsync_len;
 664                 unsigned int vsync_offset, vsync_len;
 665
 666                 hsync_offset = adj_mode->crtc_hsync_start -
 667                                adj_mode->crtc_hdisplay;
 668                 vsync_offset = adj_mode->crtc_vsync_start -
 669                                adj_mode->crtc_vdisplay;
 670                 hsync_len = adj_mode->crtc_hsync_end -
 671                             adj_mode->crtc_hsync_start;
 672                 vsync_len = adj_mode->crtc_vsync_end -
 673                             adj_mode->crtc_vsync_start;
 674
 675                 /* The hardware vsync generator has a off-by-one bug */
 676                 vsync_offset += 1;
 677
 678                 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
 679                              ((hsync_offset >> 10) & 0x7) << 5);
 680                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
 681                              (hsync_offset >> 2) & 0xff);
 682                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
 683                              ((hsync_offset & 0x3) << 6) |
 684                              ((hsync_len >> 4) & 0x3f));
 685                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
 686                              ((hsync_len & 0xf) << 4) |
 687                              ((vsync_offset >> 6) & 0xf));
 688                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
 689                              ((vsync_offset & 0x3f) << 2) |
 690                              ((vsync_len >> 8) & 0x3));
 691                 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
 692                              vsync_len & 0xff);
 693
 694                 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
 695                 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
 696         } else {
 697                 enum adv7511_sync_polarity mode_hsync_polarity;
 698                 enum adv7511_sync_polarity mode_vsync_polarity;
 699
 700                 /**
 701                  * If the input signal is always low or always high we want to
 702                  * invert or let it passthrough depending on the polarity of the
 703                  * current mode.
 704                  **/
 705                 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
 706                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 707                 else
 708                         mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 709
 710                 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
 711                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 712                 else
 713                         mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 714
 715                 if (adv7511->hsync_polarity != mode_hsync_polarity &&
 716                     adv7511->hsync_polarity !=
 717                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 718                         hsync_polarity = 1;
 719
 720                 if (adv7511->vsync_polarity != mode_vsync_polarity &&
 721                     adv7511->vsync_polarity !=
 722                     ADV7511_SYNC_POLARITY_PASSTHROUGH)
 723                         vsync_polarity = 1;
 724         }
 725
 726         if (mode->vrefresh <= 24000)
 727                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
 728         else if (mode->vrefresh <= 25000)
 729                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
 730         else if (mode->vrefresh <= 30000)
 731                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
 732         else
 733                 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 734
 735         regmap_update_bits(adv7511->regmap, 0xfb,
 736                 0x6, low_refresh_rate << 1);
 737         regmap_update_bits(adv7511->regmap, 0x17,
 738                 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 739
 740         /*
 741          * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 742          * supposed to give better results.
 743          */
 744
 745         adv7511->f_tmds = mode->clock;
 746 }
 747
 748 /* Connector funcs */
 749 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
 750 {
 751         return container_of(connector, struct adv7511, connector);
 752 }
 753
 754 static int adv7511_connector_get_modes(struct drm_connector *connector)
 755 {
 756         struct adv7511 *adv = connector_to_adv7511(connector);
 757
 758         return adv7511_get_modes(adv, connector);
 759 }
 760
 761 static enum drm_mode_status
 762 adv7511_connector_mode_valid(struct drm_connector *connector,
 763                              struct drm_display_mode *mode)
 764 {
 765         struct adv7511 *adv = connector_to_adv7511(connector);
 766
 767         return adv7511_mode_valid(adv, mode);
 768 }
 769
 770 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
 771         .get_modes = adv7511_connector_get_modes,
 772         .mode_valid = adv7511_connector_mode_valid,
 773 };
 774
 775 static enum drm_connector_status
 776 adv7511_connector_detect(struct drm_connector *connector, bool force)
 777 {
 778         struct adv7511 *adv = connector_to_adv7511(connector);
 779
 780         return adv7511_detect(adv, connector);
 781 }
 782
 783 static struct drm_connector_funcs adv7511_connector_funcs = {
 784         .dpms = drm_atomic_helper_connector_dpms,
 785         .fill_modes = drm_helper_probe_single_connector_modes,
 786         .detect = adv7511_connector_detect,
 787         .destroy = drm_connector_cleanup,
 788         .reset = drm_atomic_helper_connector_reset,
 789         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 790         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 791 };
 792
 793 /* Bridge funcs */
 794 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
 795 {
 796         return container_of(bridge, struct adv7511, bridge);
 797 }
 798
 799 static void adv7511_bridge_enable(struct drm_bridge *bridge)
 800 {
 801         struct adv7511 *adv = bridge_to_adv7511(bridge);
 802
 803         adv7511_power_on(adv);
 804 }
 805
 806 static void adv7511_bridge_disable(struct drm_bridge *bridge)
 807 {
 808         struct adv7511 *adv = bridge_to_adv7511(bridge);
 809
 810         adv7511_power_off(adv);
 811 }
 812
 813 static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
 814                                     struct drm_display_mode *mode,
 815                                     struct drm_display_mode *adj_mode)
 816 {
 817         struct adv7511 *adv = bridge_to_adv7511(bridge);
 818
 819         adv7511_mode_set(adv, mode, adj_mode);
 820 }
 821
 822 static int adv7511_bridge_attach(struct drm_bridge *bridge)
 823 {
 824         struct adv7511 *adv = bridge_to_adv7511(bridge);
 825         int ret;
 826
 827         if (!bridge->encoder) {
 828                 DRM_ERROR("Parent encoder object not found");
 829                 return -ENODEV;
 830         }
 831
 832         adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
 833
 834         ret = drm_connector_init(bridge->dev, &adv->connector,
 835                                  &adv7511_connector_funcs,
 836                                  DRM_MODE_CONNECTOR_HDMIA);
 837         if (ret) {
 838                 DRM_ERROR("Failed to initialize connector with drm\n");
 839                 return ret;
 840         }
 841         drm_connector_helper_add(&adv->connector,
 842                                  &adv7511_connector_helper_funcs);
 843         drm_mode_connector_attach_encoder(&adv->connector, bridge->encoder);
 844
 845         return ret;
 846 }
 847
 848 static struct drm_bridge_funcs adv7511_bridge_funcs = {
 849         .enable = adv7511_bridge_enable,
 850         .disable = adv7511_bridge_disable,
 851         .mode_set = adv7511_bridge_mode_set,
 852         .attach = adv7511_bridge_attach,
 853 };
 854
 855 /* -----------------------------------------------------------------------------
 856  * Probe & remove
 857  */
 858
 859 static int adv7511_parse_dt(struct device_node *np,
 860                             struct adv7511_link_config *config)
 861 {
 862         const char *str;
 863         int ret;
 864
 865         memset(config, 0, sizeof(*config));
 866
 867         of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
 868         if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
 869             config->input_color_depth != 12)
 870                 return -EINVAL;
 871
 872         ret = of_property_read_string(np, "adi,input-colorspace", &str);
 873         if (ret < 0)
 874                 return ret;
 875
 876         if (!strcmp(str, "rgb"))
 877                 config->input_colorspace = HDMI_COLORSPACE_RGB;
 878         else if (!strcmp(str, "yuv422"))
 879                 config->input_colorspace = HDMI_COLORSPACE_YUV422;
 880         else if (!strcmp(str, "yuv444"))
 881                 config->input_colorspace = HDMI_COLORSPACE_YUV444;
 882         else
 883                 return -EINVAL;
 884
 885         ret = of_property_read_string(np, "adi,input-clock", &str);
 886         if (ret < 0)
 887                 return ret;
 888
 889         if (!strcmp(str, "1x"))
 890                 config->input_clock = ADV7511_INPUT_CLOCK_1X;
 891         else if (!strcmp(str, "2x"))
 892                 config->input_clock = ADV7511_INPUT_CLOCK_2X;
 893         else if (!strcmp(str, "ddr"))
 894                 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
 895         else
 896                 return -EINVAL;
 897
 898         if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
 899             config->input_clock != ADV7511_INPUT_CLOCK_1X) {
 900                 ret = of_property_read_u32(np, "adi,input-style",
 901                                            &config->input_style);
 902                 if (ret)
 903                         return ret;
 904
 905                 if (config->input_style < 1 || config->input_style > 3)
 906                         return -EINVAL;
 907
 908                 ret = of_property_read_string(np, "adi,input-justification",
 909                                               &str);
 910                 if (ret < 0)
 911                         return ret;
 912
 913                 if (!strcmp(str, "left"))
 914                         config->input_justification =
 915                                 ADV7511_INPUT_JUSTIFICATION_LEFT;
 916                 else if (!strcmp(str, "evenly"))
 917                         config->input_justification =
 918                                 ADV7511_INPUT_JUSTIFICATION_EVENLY;
 919                 else if (!strcmp(str, "right"))
 920                         config->input_justification =
 921                                 ADV7511_INPUT_JUSTIFICATION_RIGHT;
 922                 else
 923                         return -EINVAL;
 924
 925         } else {
 926                 config->input_style = 1;
 927                 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
 928         }
 929
 930         of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
 931         if (config->clock_delay < -1200 || config->clock_delay > 1600)
 932                 return -EINVAL;
 933
 934         config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
 935
 936         /* Hardcode the sync pulse configurations for now. */
 937         config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
 938         config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 939         config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 940
 941         return 0;
 942 }
 943
 944 static const int edid_i2c_addr = 0x7e;
 945 static const int packet_i2c_addr = 0x70;
 946 static const int cec_i2c_addr = 0x78;
 947
 948 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 949 {
 950         struct adv7511_link_config link_config;
 951         struct adv7511 *adv7511;
 952         struct device *dev = &i2c->dev;
 953         unsigned int val;
 954         int ret;
 955
 956         if (!dev->of_node)
 957                 return -EINVAL;
 958
 959         adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
 960         if (!adv7511)
 961                 return -ENOMEM;
 962
 963         adv7511->powered = false;
 964         adv7511->status = connector_status_disconnected;
 965
 966         ret = adv7511_parse_dt(dev->of_node, &link_config);
 967         if (ret)
 968                 return ret;
 969
 970         /*
 971          * The power down GPIO is optional. If present, toggle it from active to
 972          * inactive to wake up the encoder.
 973          */
 974         adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
 975         if (IS_ERR(adv7511->gpio_pd))
 976                 return PTR_ERR(adv7511->gpio_pd);
 977
 978         if (adv7511->gpio_pd) {
 979                 mdelay(5);
 980                 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
 981         }
 982
 983         adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
 984         if (IS_ERR(adv7511->regmap))
 985                 return PTR_ERR(adv7511->regmap);
 986
 987         ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
 988         if (ret)
 989                 return ret;
 990         dev_dbg(dev, "Rev. %d\n", val);
 991
 992         ret = regmap_register_patch(adv7511->regmap, adv7511_fixed_registers,
 993                                     ARRAY_SIZE(adv7511_fixed_registers));
 994         if (ret)
 995                 return ret;
 996
 997         regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
 998         regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
 999                      packet_i2c_addr);
1000         regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr);
1001         adv7511_packet_disable(adv7511, 0xffff);
1002
1003         adv7511->i2c_main = i2c;
1004         adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
1005         if (!adv7511->i2c_edid)
1006                 return -ENOMEM;
1007
1008         if (i2c->irq) {
1009                 init_waitqueue_head(&adv7511->wq);
1010
1011                 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
1012                                                 adv7511_irq_handler,
1013                                                 IRQF_ONESHOT, dev_name(dev),
1014                                                 adv7511);
1015                 if (ret)
1016                         goto err_i2c_unregister_device;
1017         }
1018
1019         /* CEC is unused for now */
1020         regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
1021                      ADV7511_CEC_CTRL_POWER_DOWN);
1022
1023         adv7511_power_off(adv7511);
1024
1025         i2c_set_clientdata(i2c, adv7511);
1026
1027         adv7511_set_link_config(adv7511, &link_config);
1028
1029         adv7511->bridge.funcs = &adv7511_bridge_funcs;
1030         adv7511->bridge.of_node = dev->of_node;
1031
1032         ret = drm_bridge_add(&adv7511->bridge);
1033         if (ret) {
1034                 dev_err(dev, "failed to add adv7511 bridge\n");
1035                 goto err_i2c_unregister_device;
1036         }
1037
1038         return 0;
1039
1040 err_i2c_unregister_device:
1041         i2c_unregister_device(adv7511->i2c_edid);
1042
1043         return ret;
1044 }
1045
1046 static int adv7511_remove(struct i2c_client *i2c)
1047 {
1048         struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1049
1050         drm_bridge_remove(&adv7511->bridge);
1051
1052         i2c_unregister_device(adv7511->i2c_edid);
1053
1054         kfree(adv7511->edid);
1055
1056         return 0;
1057 }
1058
1059 static const struct i2c_device_id adv7511_i2c_ids[] = {
1060         { "adv7511", 0 },
1061         { "adv7511w", 0 },
1062         { "adv7513", 0 },
1063         { }
1064 };
1065 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
1066
1067 static const struct of_device_id adv7511_of_ids[] = {
1068         { .compatible = "adi,adv7511", },
1069         { .compatible = "adi,adv7511w", },
1070         { .compatible = "adi,adv7513", },
1071         { }
1072 };
1073 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
1074
1075 static struct i2c_driver adv7511_driver = {
1076         .driver = {
1077                 .name = "adv7511",
1078                 .of_match_table = adv7511_of_ids,
1079         },
1080         .id_table = adv7511_i2c_ids,
1081         .probe = adv7511_probe,
1082         .remove = adv7511_remove,
1083 };
1084
1085 module_i2c_driver(adv7511_driver);
1086
1087 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1088 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1089 MODULE_LICENSE("GPL");