LXR linux/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
  23struct 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
  51static 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. */
  57static 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
  73static 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
 108static 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_EDID_READ_CTRL:
 140        case ADV7511_REG_BSTATUS(0):
 141        case ADV7511_REG_BSTATUS(1):
 142        case ADV7511_REG_CHIP_ID_HIGH:
 143        case ADV7511_REG_CHIP_ID_LOW:
 144                return true;
 145        }
 146
 147        return false;
 148}
 149
 150static const struct regmap_config adv7511_regmap_config = {
 151        .reg_bits = 8,
 152        .val_bits = 8,
 153
 154        .max_register = 0xff,
 155        .cache_type = REGCACHE_RBTREE,
 156        .reg_defaults_raw = adv7511_register_defaults,
 157        .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
 158
 159        .volatile_reg = adv7511_register_volatile,
 160};
 161
 162/* -----------------------------------------------------------------------------
 163 * Hardware configuration
 164 */
 165
 166static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
 167                                 const uint16_t *coeff,
 168                                 unsigned int scaling_factor)
 169{
 170        unsigned int i;
 171
 172        regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 173                           ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
 174
 175        if (enable) {
 176                for (i = 0; i < 12; ++i) {
 177                        regmap_update_bits(adv7511->regmap,
 178                                           ADV7511_REG_CSC_UPPER(i),
 179                                           0x1f, coeff[i] >> 8);
 180                        regmap_write(adv7511->regmap,
 181                                     ADV7511_REG_CSC_LOWER(i),
 182                                     coeff[i] & 0xff);
 183                }
 184        }
 185
 186        if (enable)
 187                regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 188                                   0xe0, 0x80 | (scaling_factor << 5));
 189        else
 190                regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
 191                                   0x80, 0x00);
 192
 193        regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
 194                           ADV7511_CSC_UPDATE_MODE, 0);
 195}
 196
 197static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 198{
 199        if (packet & 0xff)
 200                regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 201                                   packet, 0xff);
 202
 203        if (packet & 0xff00) {
 204                packet >>= 8;
 205                regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 206                                   packet, 0xff);
 207        }
 208
 209        return 0;
 210}
 211
 212static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
 213{
 214        if (packet & 0xff)
 215                regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
 216                                   packet, 0x00);
 217
 218        if (packet & 0xff00) {
 219                packet >>= 8;
 220                regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
 221                                   packet, 0x00);
 222        }
 223
 224        return 0;
 225}
 226
 227/* Coefficients for adv7511 color space conversion */
 228static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
 229        0x0734, 0x04ad, 0x0000, 0x1c1b,
 230        0x1ddc, 0x04ad, 0x1f24, 0x0135,
 231        0x0000, 0x04ad, 0x087c, 0x1b77,
 232};
 233
 234static void adv7511_set_config_csc(struct adv7511 *adv7511,
 235                                   struct drm_connector *connector,
 236                                   bool rgb)
 237{
 238        struct adv7511_video_config config;
 239        bool output_format_422, output_format_ycbcr;
 240        unsigned int mode;
 241        uint8_t infoframe[17];
 242
 243        if (adv7511->edid)
 244                config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
 245        else
 246                config.hdmi_mode = false;
 247
 248        hdmi_avi_infoframe_init(&config.avi_infoframe);
 249
 250        config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
 251
 252        if (rgb) {
 253                config.csc_enable = false;
 254                config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 255        } else {
 256                config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
 257                config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
 258
 259                if ((connector->display_info.color_formats &
 260                     DRM_COLOR_FORMAT_YCRCB422) &&
 261                    config.hdmi_mode) {
 262                        config.csc_enable = false;
 263                        config.avi_infoframe.colorspace =
 264                                HDMI_COLORSPACE_YUV422;
 265                } else {
 266                        config.csc_enable = true;
 267                        config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
 268                }
 269        }
 270
 271        if (config.hdmi_mode) {
 272                mode = ADV7511_HDMI_CFG_MODE_HDMI;
 273
 274                switch (config.avi_infoframe.colorspace) {
 275                case HDMI_COLORSPACE_YUV444:
 276                        output_format_422 = false;
 277                        output_format_ycbcr = true;
 278                        break;
 279                case HDMI_COLORSPACE_YUV422:
 280                        output_format_422 = true;
 281                        output_format_ycbcr = true;
 282                        break;
 283                default:
 284                        output_format_422 = false;
 285                        output_format_ycbcr = false;
 286                        break;
 287                }
 288        } else {
 289                mode = ADV7511_HDMI_CFG_MODE_DVI;
 290                output_format_422 = false;
 291                output_format_ycbcr = false;
 292        }
 293
 294        adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 295
 296        adv7511_set_colormap(adv7511, config.csc_enable,
 297                             config.csc_coefficents,
 298                             config.csc_scaling_factor);
 299
 300        regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
 301                           (output_format_422 << 7) | output_format_ycbcr);
 302
 303        regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
 304                           ADV7511_HDMI_CFG_MODE_MASK, mode);
 305
 306        hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
 307                                sizeof(infoframe));
 308
 309        /* The AVI infoframe id is not configurable */
 310        regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
 311                          infoframe + 1, sizeof(infoframe) - 1);
 312
 313        adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
 314}
 315
 316static void adv7511_set_link_config(struct adv7511 *adv7511,
 317                                    const struct adv7511_link_config *config)
 318{
 319        /*
 320         * The input style values documented in the datasheet don't match the
 321         * hardware register field values :-(
 322         */
 323        static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
 324
 325        unsigned int clock_delay;
 326        unsigned int color_depth;
 327        unsigned int input_id;
 328
 329        clock_delay = (config->clock_delay + 1200) / 400;
 330        color_depth = config->input_color_depth == 8 ? 3
 331                    : (config->input_color_depth == 10 ? 1 : 2);
 332
 333        /* TODO Support input ID 6 */
 334        if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
 335                input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
 336                         ? 5 : 0;
 337        else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
 338                input_id = config->embedded_sync ? 8 : 7;
 339        else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
 340                input_id = config->embedded_sync ? 4 : 3;
 341        else
 342                input_id = config->embedded_sync ? 2 : 1;
 343
 344        regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
 345                           input_id);
 346        regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
 347                           (color_depth << 4) |
 348                           (input_styles[config->input_style] << 2));
 349        regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
 350                     config->input_justification << 3);
 351        regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
 352                     config->sync_pulse << 2);
 353
 354        regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
 355
 356        adv7511->embedded_sync = config->embedded_sync;
 357        adv7511->hsync_polarity = config->hsync_polarity;
 358        adv7511->vsync_polarity = config->vsync_polarity;
 359        adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
 360}
 361
 362static void adv7511_power_on(struct adv7511 *adv7511)
 363{
 364        adv7511->current_edid_segment = -1;
 365
 366        regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 367                           ADV7511_POWER_POWER_DOWN, 0);
 368        if (adv7511->i2c_main->irq) {
 369                /*
 370                 * Documentation says the INT_ENABLE registers are reset in
 371                 * POWER_DOWN mode. My 7511w preserved the bits, however.
 372                 * Still, let's be safe and stick to the documentation.
 373                 */
 374                regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 375                             ADV7511_INT0_EDID_READY);
 376                regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
 377                             ADV7511_INT1_DDC_ERROR);
 378        }
 379
 380        /*
 381         * Per spec it is allowed to pulse the HPD signal to indicate that the
 382         * EDID information has changed. Some monitors do this when they wakeup
 383         * from standby or are enabled. When the HPD goes low the adv7511 is
 384         * reset and the outputs are disabled which might cause the monitor to
 385         * go to standby again. To avoid this we ignore the HPD pin for the
 386         * first few seconds after enabling the output.
 387         */
 388        regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 389                           ADV7511_REG_POWER2_HPD_SRC_MASK,
 390                           ADV7511_REG_POWER2_HPD_SRC_NONE);
 391
 392        /*
 393         * Most of the registers are reset during power down or when HPD is low.
 394         */
 395        regcache_sync(adv7511->regmap);
 396
 397        adv7511->powered = true;
 398}
 399
 400static void adv7511_power_off(struct adv7511 *adv7511)
 401{
 402        /* TODO: setup additional power down modes */
 403        regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 404                           ADV7511_POWER_POWER_DOWN,
 405                           ADV7511_POWER_POWER_DOWN);
 406        regcache_mark_dirty(adv7511->regmap);
 407
 408        adv7511->powered = false;
 409}
 410
 411/* -----------------------------------------------------------------------------
 412 * Interrupt and hotplug detection
 413 */
 414
 415static bool adv7511_hpd(struct adv7511 *adv7511)
 416{
 417        unsigned int irq0;
 418        int ret;
 419
 420        ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 421        if (ret < 0)
 422                return false;
 423
 424        if (irq0 & ADV7511_INT0_HPD) {
 425                regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
 426                             ADV7511_INT0_HPD);
 427                return true;
 428        }
 429
 430        return false;
 431}
 432
 433static int adv7511_irq_process(struct adv7511 *adv7511)
 434{
 435        unsigned int irq0, irq1;
 436        int ret;
 437
 438        ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 439        if (ret < 0)
 440                return ret;
 441
 442        ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
 443        if (ret < 0)
 444                return ret;
 445
 446        regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 447        regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 448
 449        if (irq0 & ADV7511_INT0_HPD && adv7511->encoder)
 450                drm_helper_hpd_irq_event(adv7511->encoder->dev);
 451
 452        if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 453                adv7511->edid_read = true;
 454
 455                if (adv7511->i2c_main->irq)
 456                        wake_up_all(&adv7511->wq);
 457        }
 458
 459        return 0;
 460}
 461
 462static irqreturn_t adv7511_irq_handler(int irq, void *devid)
 463{
 464        struct adv7511 *adv7511 = devid;
 465        int ret;
 466
 467        ret = adv7511_irq_process(adv7511);
 468        return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
 469}
 470
 471/* -----------------------------------------------------------------------------
 472 * EDID retrieval
 473 */
 474
 475static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
 476{
 477        int ret;
 478
 479        if (adv7511->i2c_main->irq) {
 480                ret = wait_event_interruptible_timeout(adv7511->wq,
 481                                adv7511->edid_read, msecs_to_jiffies(timeout));
 482        } else {
 483                for (; timeout > 0; timeout -= 25) {
 484                        ret = adv7511_irq_process(adv7511);
 485                        if (ret < 0)
 486                                break;
 487
 488                        if (adv7511->edid_read)
 489                                break;
 490
 491                        msleep(25);
 492                }
 493        }
 494
 495        return adv7511->edid_read ? 0 : -EIO;
 496}
 497
 498static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
 499                                  size_t len)
 500{
 501        struct adv7511 *adv7511 = data;
 502        struct i2c_msg xfer[2];
 503        uint8_t offset;
 504        unsigned int i;
 505        int ret;
 506
 507        if (len > 128)
 508                return -EINVAL;
 509
 510        if (adv7511->current_edid_segment != block / 2) {
 511                unsigned int status;
 512
 513                ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
 514                                  &status);
 515                if (ret < 0)
 516                        return ret;
 517
 518                if (status != 2) {
 519                        adv7511->edid_read = false;
 520                        regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
 521                                     block);
 522                        ret = adv7511_wait_for_edid(adv7511, 200);
 523                        if (ret < 0)
 524                                return ret;
 525                }
 526
 527                /* Break this apart, hopefully more I2C controllers will
 528                 * support 64 byte transfers than 256 byte transfers
 529                 */
 530
 531                xfer[0].addr = adv7511->i2c_edid->addr;
 532                xfer[0].flags = 0;
 533                xfer[0].len = 1;
 534                xfer[0].buf = &offset;
 535                xfer[1].addr = adv7511->i2c_edid->addr;
 536                xfer[1].flags = I2C_M_RD;
 537                xfer[1].len = 64;
 538                xfer[1].buf = adv7511->edid_buf;
 539
 540                offset = 0;
 541
 542                for (i = 0; i < 4; ++i) {
 543                        ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
 544                                           ARRAY_SIZE(xfer));
 545                        if (ret < 0)
 546                                return ret;
 547                        else if (ret != 2)
 548                                return -EIO;
 549
 550                        xfer[1].buf += 64;
 551                        offset += 64;
 552                }
 553
 554                adv7511->current_edid_segment = block / 2;
 555        }
 556
 557        if (block % 2 == 0)
 558                memcpy(buf, adv7511->edid_buf, len);
 559        else
 560                memcpy(buf, adv7511->edid_buf + 128, len);
 561
 562        return 0;
 563}
 564
 565/* -----------------------------------------------------------------------------
 566 * Encoder operations
 567 */
 568
 569static int adv7511_get_modes(struct drm_encoder *encoder,
 570                             struct drm_connector *connector)
 571{
 572        struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 573        struct edid *edid;
 574        unsigned int count;
 575
 576        /* Reading the EDID only works if the device is powered */
 577        if (!adv7511->powered) {
 578                regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 579                                   ADV7511_POWER_POWER_DOWN, 0);
 580                if (adv7511->i2c_main->irq) {
 581                        regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 582                                     ADV7511_INT0_EDID_READY);
 583                        regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
 584                                     ADV7511_INT1_DDC_ERROR);
 585                }
 586                adv7511->current_edid_segment = -1;
 587        }
 588
 589        edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
 590
 591        if (!adv7511->powered)
 592                regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 593                                   ADV7511_POWER_POWER_DOWN,
 594                                   ADV7511_POWER_POWER_DOWN);
 595
 596        kfree(adv7511->edid);
 597        adv7511->edid = edid;
 598        if (!edid)
 599                return 0;
 600
 601        drm_mode_connector_update_edid_property(connector, edid);
 602        count = drm_add_edid_modes(connector, edid);
 603
 604        adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
 605
 606        return count;
 607}
 608
 609static void adv7511_encoder_dpms(struct drm_encoder *encoder, int mode)
 610{
 611        struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 612
 613        if (mode == DRM_MODE_DPMS_ON)
 614                adv7511_power_on(adv7511);
 615        else
 616                adv7511_power_off(adv7511);
 617}
 618
 619static enum drm_connector_status
 620adv7511_encoder_detect(struct drm_encoder *encoder,
 621                       struct drm_connector *connector)
 622{
 623        struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 624        enum drm_connector_status status;
 625        unsigned int val;
 626        bool hpd;
 627        int ret;
 628
 629        ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
 630        if (ret < 0)
 631                return connector_status_disconnected;
 632
 633        if (val & ADV7511_STATUS_HPD)
 634                status = connector_status_connected;
 635        else
 636                status = connector_status_disconnected;
 637
 638        hpd = adv7511_hpd(adv7511);
 639
 640        /* The chip resets itself when the cable is disconnected, so in case
 641         * there is a pending HPD interrupt and the cable is connected there was
 642         * at least one transition from disconnected to connected and the chip
 643         * has to be reinitialized. */
 644        if (status == connector_status_connected && hpd && adv7511->powered) {
 645                regcache_mark_dirty(adv7511->regmap);
 646                adv7511_power_on(adv7511);
 647                adv7511_get_modes(encoder, connector);
 648                if (adv7511->status == connector_status_connected)
 649                        status = connector_status_disconnected;
 650        } else {
 651                /* Renable HPD sensing */
 652                regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
 653                                   ADV7511_REG_POWER2_HPD_SRC_MASK,
 654                                   ADV7511_REG_POWER2_HPD_SRC_BOTH);
 655        }
 656
 657        adv7511->status = status;
 658        return status;
 659}
 660
 661static int adv7511_encoder_mode_valid(struct drm_encoder *encoder,
 662                                      struct drm_display_mode *mode)
 663{
 664        if (mode->clock > 165000)
 665                return MODE_CLOCK_HIGH;
 666
 667        return MODE_OK;
 668}
 669
 670static void adv7511_encoder_mode_set(struct drm_encoder *encoder,
 671                                     struct drm_display_mode *mode,
 672                                     struct drm_display_mode *adj_mode)
 673{
 674        struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
 675        unsigned int low_refresh_rate;
 676        unsigned int hsync_polarity = 0;
 677        unsigned int vsync_polarity = 0;
 678
 679        if (adv7511->embedded_sync) {
 680                unsigned int hsync_offset, hsync_len;
 681                unsigned int vsync_offset, vsync_len;
 682
 683                hsync_offset = adj_mode->crtc_hsync_start -
 684                               adj_mode->crtc_hdisplay;
 685                vsync_offset = adj_mode->crtc_vsync_start -
 686                               adj_mode->crtc_vdisplay;
 687                hsync_len = adj_mode->crtc_hsync_end -
 688                            adj_mode->crtc_hsync_start;
 689                vsync_len = adj_mode->crtc_vsync_end -
 690                            adj_mode->crtc_vsync_start;
 691
 692                /* The hardware vsync generator has a off-by-one bug */
 693                vsync_offset += 1;
 694
 695                regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
 696                             ((hsync_offset >> 10) & 0x7) << 5);
 697                regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
 698                             (hsync_offset >> 2) & 0xff);
 699                regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
 700                             ((hsync_offset & 0x3) << 6) |
 701                             ((hsync_len >> 4) & 0x3f));
 702                regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
 703                             ((hsync_len & 0xf) << 4) |
 704                             ((vsync_offset >> 6) & 0xf));
 705                regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
 706                             ((vsync_offset & 0x3f) << 2) |
 707                             ((vsync_len >> 8) & 0x3));
 708                regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
 709                             vsync_len & 0xff);
 710
 711                hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
 712                vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
 713        } else {
 714                enum adv7511_sync_polarity mode_hsync_polarity;
 715                enum adv7511_sync_polarity mode_vsync_polarity;
 716
 717                /**
 718                 * If the input signal is always low or always high we want to
 719                 * invert or let it passthrough depending on the polarity of the
 720                 * current mode.
 721                 **/
 722                if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
 723                        mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 724                else
 725                        mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 726
 727                if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
 728                        mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
 729                else
 730                        mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
 731
 732                if (adv7511->hsync_polarity != mode_hsync_polarity &&
 733                    adv7511->hsync_polarity !=
 734                    ADV7511_SYNC_POLARITY_PASSTHROUGH)
 735                        hsync_polarity = 1;
 736
 737                if (adv7511->vsync_polarity != mode_vsync_polarity &&
 738                    adv7511->vsync_polarity !=
 739                    ADV7511_SYNC_POLARITY_PASSTHROUGH)
 740                        vsync_polarity = 1;
 741        }
 742
 743        if (mode->vrefresh <= 24000)
 744                low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
 745        else if (mode->vrefresh <= 25000)
 746                low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
 747        else if (mode->vrefresh <= 30000)
 748                low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
 749        else
 750                low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 751
 752        regmap_update_bits(adv7511->regmap, 0xfb,
 753                0x6, low_refresh_rate << 1);
 754        regmap_update_bits(adv7511->regmap, 0x17,
 755                0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 756
 757        /*
 758         * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 759         * supposed to give better results.
 760         */
 761
 762        adv7511->f_tmds = mode->clock;
 763}
 764
 765static const struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
 766        .dpms = adv7511_encoder_dpms,
 767        .mode_valid = adv7511_encoder_mode_valid,
 768        .mode_set = adv7511_encoder_mode_set,
 769        .detect = adv7511_encoder_detect,
 770        .get_modes = adv7511_get_modes,
 771};
 772
 773/* -----------------------------------------------------------------------------
 774 * Probe & remove
 775 */
 776
 777static int adv7511_parse_dt(struct device_node *np,
 778                            struct adv7511_link_config *config)
 779{
 780        const char *str;
 781        int ret;
 782
 783        memset(config, 0, sizeof(*config));
 784
 785        of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
 786        if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
 787            config->input_color_depth != 12)
 788                return -EINVAL;
 789
 790        ret = of_property_read_string(np, "adi,input-colorspace", &str);
 791        if (ret < 0)
 792                return ret;
 793
 794        if (!strcmp(str, "rgb"))
 795                config->input_colorspace = HDMI_COLORSPACE_RGB;
 796        else if (!strcmp(str, "yuv422"))
 797                config->input_colorspace = HDMI_COLORSPACE_YUV422;
 798        else if (!strcmp(str, "yuv444"))
 799                config->input_colorspace = HDMI_COLORSPACE_YUV444;
 800        else
 801                return -EINVAL;
 802
 803        ret = of_property_read_string(np, "adi,input-clock", &str);
 804        if (ret < 0)
 805                return ret;
 806
 807        if (!strcmp(str, "1x"))
 808                config->input_clock = ADV7511_INPUT_CLOCK_1X;
 809        else if (!strcmp(str, "2x"))
 810                config->input_clock = ADV7511_INPUT_CLOCK_2X;
 811        else if (!strcmp(str, "ddr"))
 812                config->input_clock = ADV7511_INPUT_CLOCK_DDR;
 813        else
 814                return -EINVAL;
 815
 816        if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
 817            config->input_clock != ADV7511_INPUT_CLOCK_1X) {
 818                ret = of_property_read_u32(np, "adi,input-style",
 819                                           &config->input_style);
 820                if (ret)
 821                        return ret;
 822
 823                if (config->input_style < 1 || config->input_style > 3)
 824                        return -EINVAL;
 825
 826                ret = of_property_read_string(np, "adi,input-justification",
 827                                              &str);
 828                if (ret < 0)
 829                        return ret;
 830
 831                if (!strcmp(str, "left"))
 832                        config->input_justification =
 833                                ADV7511_INPUT_JUSTIFICATION_LEFT;
 834                else if (!strcmp(str, "evenly"))
 835                        config->input_justification =
 836                                ADV7511_INPUT_JUSTIFICATION_EVENLY;
 837                else if (!strcmp(str, "right"))
 838                        config->input_justification =
 839                                ADV7511_INPUT_JUSTIFICATION_RIGHT;
 840                else
 841                        return -EINVAL;
 842
 843        } else {
 844                config->input_style = 1;
 845                config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
 846        }
 847
 848        of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
 849        if (config->clock_delay < -1200 || config->clock_delay > 1600)
 850                return -EINVAL;
 851
 852        config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
 853
 854        /* Hardcode the sync pulse configurations for now. */
 855        config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
 856        config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 857        config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
 858
 859        return 0;
 860}
 861
 862static const int edid_i2c_addr = 0x7e;
 863static const int packet_i2c_addr = 0x70;
 864static const int cec_i2c_addr = 0x78;
 865
 866static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 867{
 868        struct adv7511_link_config link_config;
 869        struct adv7511 *adv7511;
 870        struct device *dev = &i2c->dev;
 871        unsigned int val;
 872        int ret;
 873
 874        if (!dev->of_node)
 875                return -EINVAL;
 876
 877        adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
 878        if (!adv7511)
 879                return -ENOMEM;
 880
 881        adv7511->powered = false;
 882        adv7511->status = connector_status_disconnected;
 883
 884        ret = adv7511_parse_dt(dev->of_node, &link_config);
 885        if (ret)
 886                return ret;
 887
 888        /*
 889         * The power down GPIO is optional. If present, toggle it from active to
 890         * inactive to wake up the encoder.
 891         */
 892        adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
 893        if (IS_ERR(adv7511->gpio_pd))
 894                return PTR_ERR(adv7511->gpio_pd);
 895
 896        if (adv7511->gpio_pd) {
 897                mdelay(5);
 898                gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
 899        }
 900
 901        adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
 902        if (IS_ERR(adv7511->regmap))
 903                return PTR_ERR(adv7511->regmap);
 904
 905        ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
 906        if (ret)
 907                return ret;
 908        dev_dbg(dev, "Rev. %d\n", val);
 909
 910        ret = regmap_register_patch(adv7511->regmap, adv7511_fixed_registers,
 911                                    ARRAY_SIZE(adv7511_fixed_registers));
 912        if (ret)
 913                return ret;
 914
 915        regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
 916        regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
 917                     packet_i2c_addr);
 918        regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr);
 919        adv7511_packet_disable(adv7511, 0xffff);
 920
 921        adv7511->i2c_main = i2c;
 922        adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
 923        if (!adv7511->i2c_edid)
 924                return -ENOMEM;
 925
 926        if (i2c->irq) {
 927                init_waitqueue_head(&adv7511->wq);
 928
 929                ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
 930                                                adv7511_irq_handler,
 931                                                IRQF_ONESHOT, dev_name(dev),
 932                                                adv7511);
 933                if (ret)
 934                        goto err_i2c_unregister_device;
 935        }
 936
 937        /* CEC is unused for now */
 938        regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
 939                     ADV7511_CEC_CTRL_POWER_DOWN);
 940
 941        adv7511_power_off(adv7511);
 942
 943        i2c_set_clientdata(i2c, adv7511);
 944
 945        adv7511_set_link_config(adv7511, &link_config);
 946
 947        return 0;
 948
 949err_i2c_unregister_device:
 950        i2c_unregister_device(adv7511->i2c_edid);
 951
 952        return ret;
 953}
 954
 955static int adv7511_remove(struct i2c_client *i2c)
 956{
 957        struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
 958
 959        i2c_unregister_device(adv7511->i2c_edid);
 960
 961        kfree(adv7511->edid);
 962
 963        return 0;
 964}
 965
 966static int adv7511_encoder_init(struct i2c_client *i2c, struct drm_device *dev,
 967                                struct drm_encoder_slave *encoder)
 968{
 969
 970        struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
 971
 972        encoder->slave_priv = adv7511;
 973        encoder->slave_funcs = &adv7511_encoder_funcs;
 974
 975        adv7511->encoder = &encoder->base;
 976
 977        return 0;
 978}
 979
 980static const struct i2c_device_id adv7511_i2c_ids[] = {
 981        { "adv7511", 0 },
 982        { "adv7511w", 0 },
 983        { "adv7513", 0 },
 984        { }
 985};
 986MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
 987
 988static const struct of_device_id adv7511_of_ids[] = {
 989        { .compatible = "adi,adv7511", },
 990        { .compatible = "adi,adv7511w", },
 991        { .compatible = "adi,adv7513", },
 992        { }
 993};
 994MODULE_DEVICE_TABLE(of, adv7511_of_ids);
 995
 996static struct drm_i2c_encoder_driver adv7511_driver = {
 997        .i2c_driver = {
 998                .driver = {
 999                        .name = "adv7511",
1000                        .of_match_table = adv7511_of_ids,

1001                },
1002                .id_table = adv7511_i2c_ids,
1003                .probe = adv7511_probe,
1004                .remove = adv7511_remove,
1005        },
1006
1007        .encoder_init = adv7511_encoder_init,
1008};
1009
1010static int __init adv7511_init(void)
1011{
1012        return drm_i2c_encoder_register(THIS_MODULE, &adv7511_driver);
1013}
1014module_init(adv7511_init);
1015
1016static void __exit adv7511_exit(void)
1017{
1018        drm_i2c_encoder_unregister(&adv7511_driver);
1019}
1020module_exit(adv7511_exit);
1021
1022MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1023MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1024MODULE_LICENSE("GPL");
1025