drivers/gpu/drm/bridge/sii902x.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2018 Renesas Electronics
   4  *
   5  * Copyright (C) 2016 Atmel
   6  *                    Bo Shen <voice.shen@atmel.com>
   7  *
   8  * Authors:           Bo Shen <voice.shen@atmel.com>
   9  *                    Boris Brezillon <boris.brezillon@free-electrons.com>
  10  *                    Wu, Songjun <Songjun.Wu@atmel.com>
  11  *
  12  * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
  13  */
  14
  15 #include <linux/gpio/consumer.h>
  16 #include <linux/i2c-mux.h>
  17 #include <linux/i2c.h>
  18 #include <linux/module.h>
  19 #include <linux/regmap.h>
  20 #include <linux/clk.h>
  21
  22 #include <drm/drm_atomic_helper.h>
  23 #include <drm/drm_bridge.h>
  24 #include <drm/drm_drv.h>
  25 #include <drm/drm_edid.h>
  26 #include <drm/drm_print.h>
  27 #include <drm/drm_probe_helper.h>
  28
  29 #include <sound/hdmi-codec.h>
  30
  31 #define SII902X_TPI_VIDEO_DATA                  0x0
  32
  33 #define SII902X_TPI_PIXEL_REPETITION            0x8
  34 #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT     BIT(5)
  35 #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE   BIT(4)
  36 #define SII902X_TPI_AVI_PIXEL_REP_4X            3
  37 #define SII902X_TPI_AVI_PIXEL_REP_2X            1
  38 #define SII902X_TPI_AVI_PIXEL_REP_NONE          0
  39 #define SII902X_TPI_CLK_RATIO_HALF              (0 << 6)
  40 #define SII902X_TPI_CLK_RATIO_1X                (1 << 6)
  41 #define SII902X_TPI_CLK_RATIO_2X                (2 << 6)
  42 #define SII902X_TPI_CLK_RATIO_4X                (3 << 6)
  43
  44 #define SII902X_TPI_AVI_IN_FORMAT               0x9
  45 #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT     BIT(7)
  46 #define SII902X_TPI_AVI_INPUT_DITHER            BIT(6)
  47 #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED     (2 << 2)
  48 #define SII902X_TPI_AVI_INPUT_RANGE_FULL        (1 << 2)
  49 #define SII902X_TPI_AVI_INPUT_RANGE_AUTO        (0 << 2)
  50 #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK  (3 << 0)
  51 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
  52 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
  53 #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB    (0 << 0)
  54
  55 #define SII902X_TPI_AVI_INFOFRAME               0x0c
  56
  57 #define SII902X_SYS_CTRL_DATA                   0x1a
  58 #define SII902X_SYS_CTRL_PWR_DWN                BIT(4)
  59 #define SII902X_SYS_CTRL_AV_MUTE                BIT(3)
  60 #define SII902X_SYS_CTRL_DDC_BUS_REQ            BIT(2)
  61 #define SII902X_SYS_CTRL_DDC_BUS_GRTD           BIT(1)
  62 #define SII902X_SYS_CTRL_OUTPUT_MODE            BIT(0)
  63 #define SII902X_SYS_CTRL_OUTPUT_HDMI            1
  64 #define SII902X_SYS_CTRL_OUTPUT_DVI             0
  65
  66 #define SII902X_REG_CHIPID(n)                   (0x1b + (n))
  67
  68 #define SII902X_PWR_STATE_CTRL                  0x1e
  69 #define SII902X_AVI_POWER_STATE_MSK             GENMASK(1, 0)
  70 #define SII902X_AVI_POWER_STATE_D(l)            ((l) & SII902X_AVI_POWER_STATE_MSK)
  71
  72 /* Audio  */
  73 #define SII902X_TPI_I2S_ENABLE_MAPPING_REG      0x1f
  74 #define SII902X_TPI_I2S_CONFIG_FIFO0                    (0 << 0)
  75 #define SII902X_TPI_I2S_CONFIG_FIFO1                    (1 << 0)
  76 #define SII902X_TPI_I2S_CONFIG_FIFO2                    (2 << 0)
  77 #define SII902X_TPI_I2S_CONFIG_FIFO3                    (3 << 0)
  78 #define SII902X_TPI_I2S_LEFT_RIGHT_SWAP                 (1 << 2)
  79 #define SII902X_TPI_I2S_AUTO_DOWNSAMPLE                 (1 << 3)
  80 #define SII902X_TPI_I2S_SELECT_SD0                      (0 << 4)
  81 #define SII902X_TPI_I2S_SELECT_SD1                      (1 << 4)
  82 #define SII902X_TPI_I2S_SELECT_SD2                      (2 << 4)
  83 #define SII902X_TPI_I2S_SELECT_SD3                      (3 << 4)
  84 #define SII902X_TPI_I2S_FIFO_ENABLE                     (1 << 7)
  85
  86 #define SII902X_TPI_I2S_INPUT_CONFIG_REG        0x20
  87 #define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES             (0 << 0)
  88 #define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO              (1 << 0)
  89 #define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST          (0 << 1)
  90 #define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST          (1 << 1)
  91 #define SII902X_TPI_I2S_SD_JUSTIFY_LEFT                 (0 << 2)
  92 #define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT                (1 << 2)
  93 #define SII902X_TPI_I2S_WS_POLARITY_LOW                 (0 << 3)
  94 #define SII902X_TPI_I2S_WS_POLARITY_HIGH                (1 << 3)
  95 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_128             (0 << 4)
  96 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_256             (1 << 4)
  97 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_384             (2 << 4)
  98 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_512             (3 << 4)
  99 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_768             (4 << 4)
 100 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024            (5 << 4)
 101 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152            (6 << 4)
 102 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_192             (7 << 4)
 103 #define SII902X_TPI_I2S_SCK_EDGE_FALLING                (0 << 7)
 104 #define SII902X_TPI_I2S_SCK_EDGE_RISING                 (1 << 7)
 105
 106 #define SII902X_TPI_I2S_STRM_HDR_BASE   0x21
 107 #define SII902X_TPI_I2S_STRM_HDR_SIZE   5
 108
 109 #define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG      0x26
 110 #define SII902X_TPI_AUDIO_CODING_STREAM_HEADER          (0 << 0)
 111 #define SII902X_TPI_AUDIO_CODING_PCM                    (1 << 0)
 112 #define SII902X_TPI_AUDIO_CODING_AC3                    (2 << 0)
 113 #define SII902X_TPI_AUDIO_CODING_MPEG1                  (3 << 0)
 114 #define SII902X_TPI_AUDIO_CODING_MP3                    (4 << 0)
 115 #define SII902X_TPI_AUDIO_CODING_MPEG2                  (5 << 0)
 116 #define SII902X_TPI_AUDIO_CODING_AAC                    (6 << 0)
 117 #define SII902X_TPI_AUDIO_CODING_DTS                    (7 << 0)
 118 #define SII902X_TPI_AUDIO_CODING_ATRAC                  (8 << 0)
 119 #define SII902X_TPI_AUDIO_MUTE_DISABLE                  (0 << 4)
 120 #define SII902X_TPI_AUDIO_MUTE_ENABLE                   (1 << 4)
 121 #define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS             (0 << 5)
 122 #define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS             (1 << 5)
 123 #define SII902X_TPI_AUDIO_INTERFACE_DISABLE             (0 << 6)
 124 #define SII902X_TPI_AUDIO_INTERFACE_SPDIF               (1 << 6)
 125 #define SII902X_TPI_AUDIO_INTERFACE_I2S                 (2 << 6)
 126
 127 #define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG      0x27
 128 #define SII902X_TPI_AUDIO_FREQ_STREAM                   (0 << 3)
 129 #define SII902X_TPI_AUDIO_FREQ_32KHZ                    (1 << 3)
 130 #define SII902X_TPI_AUDIO_FREQ_44KHZ                    (2 << 3)
 131 #define SII902X_TPI_AUDIO_FREQ_48KHZ                    (3 << 3)
 132 #define SII902X_TPI_AUDIO_FREQ_88KHZ                    (4 << 3)
 133 #define SII902X_TPI_AUDIO_FREQ_96KHZ                    (5 << 3)
 134 #define SII902X_TPI_AUDIO_FREQ_176KHZ                   (6 << 3)
 135 #define SII902X_TPI_AUDIO_FREQ_192KHZ                   (7 << 3)
 136 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM            (0 << 6)
 137 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_16                (1 << 6)
 138 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_20                (2 << 6)
 139 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_24                (3 << 6)
 140
 141 #define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG      0x28
 142
 143 #define SII902X_INT_ENABLE                      0x3c
 144 #define SII902X_INT_STATUS                      0x3d
 145 #define SII902X_HOTPLUG_EVENT                   BIT(0)
 146 #define SII902X_PLUGGED_STATUS                  BIT(2)
 147
 148 #define SII902X_REG_TPI_RQB                     0xc7
 149
 150 /* Indirect internal register access */
 151 #define SII902X_IND_SET_PAGE                    0xbc
 152 #define SII902X_IND_OFFSET                      0xbd
 153 #define SII902X_IND_VALUE                       0xbe
 154
 155 #define SII902X_TPI_MISC_INFOFRAME_BASE         0xbf
 156 #define SII902X_TPI_MISC_INFOFRAME_END          0xde
 157 #define SII902X_TPI_MISC_INFOFRAME_SIZE \
 158         (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
 159
 160 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS  500
 161
 162 #define SII902X_AUDIO_PORT_INDEX                3
 163
 164 struct sii902x {
 165         struct i2c_client *i2c;
 166         struct regmap *regmap;
 167         struct drm_bridge bridge;
 168         struct drm_connector connector;
 169         struct gpio_desc *reset_gpio;
 170         struct i2c_mux_core *i2cmux;
 171         /*
 172          * Mutex protects audio and video functions from interfering
 173          * each other, by keeping their i2c command sequences atomic.
 174          */
 175         struct mutex mutex;
 176         struct sii902x_audio {
 177                 struct platform_device *pdev;
 178                 struct clk *mclk;
 179                 u32 i2s_fifo_sequence[4];
 180         } audio;
 181 };
 182
 183 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
 184 {
 185         union i2c_smbus_data data;
 186         int ret;
 187
 188         ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
 189                                I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
 190
 191         if (ret < 0)
 192                 return ret;
 193
 194         *val = data.byte;
 195         return 0;
 196 }
 197
 198 static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
 199 {
 200         union i2c_smbus_data data;
 201
 202         data.byte = val;
 203
 204         return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
 205                                 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
 206                                 &data);
 207 }
 208
 209 static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
 210                                         u8 val)
 211 {
 212         int ret;
 213         u8 status;
 214
 215         ret = sii902x_read_unlocked(i2c, reg, &status);
 216         if (ret)
 217                 return ret;
 218         status &= ~mask;
 219         status |= val & mask;
 220         return sii902x_write_unlocked(i2c, reg, status);
 221 }
 222
 223 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
 224 {
 225         return container_of(bridge, struct sii902x, bridge);
 226 }
 227
 228 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
 229 {
 230         return container_of(con, struct sii902x, connector);
 231 }
 232
 233 static void sii902x_reset(struct sii902x *sii902x)
 234 {
 235         if (!sii902x->reset_gpio)
 236                 return;
 237
 238         gpiod_set_value(sii902x->reset_gpio, 1);
 239
 240         /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
 241         usleep_range(150, 200);
 242
 243         gpiod_set_value(sii902x->reset_gpio, 0);
 244 }
 245
 246 static enum drm_connector_status
 247 sii902x_connector_detect(struct drm_connector *connector, bool force)
 248 {
 249         struct sii902x *sii902x = connector_to_sii902x(connector);
 250         unsigned int status;
 251
 252         mutex_lock(&sii902x->mutex);
 253
 254         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 255
 256         mutex_unlock(&sii902x->mutex);
 257
 258         return (status & SII902X_PLUGGED_STATUS) ?
 259                connector_status_connected : connector_status_disconnected;
 260 }
 261
 262 static const struct drm_connector_funcs sii902x_connector_funcs = {
 263         .detect = sii902x_connector_detect,
 264         .fill_modes = drm_helper_probe_single_connector_modes,
 265         .destroy = drm_connector_cleanup,
 266         .reset = drm_atomic_helper_connector_reset,
 267         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 268         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 269 };
 270
 271 static int sii902x_get_modes(struct drm_connector *connector)
 272 {
 273         struct sii902x *sii902x = connector_to_sii902x(connector);
 274         u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 275         u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
 276         struct edid *edid;
 277         int num = 0, ret;
 278
 279         mutex_lock(&sii902x->mutex);
 280
 281         edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
 282         drm_connector_update_edid_property(connector, edid);
 283         if (edid) {
 284                 if (drm_detect_hdmi_monitor(edid))
 285                         output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
 286
 287                 num = drm_add_edid_modes(connector, edid);
 288                 kfree(edid);
 289         }
 290
 291         ret = drm_display_info_set_bus_formats(&connector->display_info,
 292                                                &bus_format, 1);
 293         if (ret)
 294                 goto error_out;
 295
 296         ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 297                                  SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
 298         if (ret)
 299                 goto error_out;
 300
 301         ret = num;
 302
 303 error_out:
 304         mutex_unlock(&sii902x->mutex);
 305
 306         return ret;
 307 }
 308
 309 static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
 310                                                struct drm_display_mode *mode)
 311 {
 312         /* TODO: check mode */
 313
 314         return MODE_OK;
 315 }
 316
 317 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
 318         .get_modes = sii902x_get_modes,
 319         .mode_valid = sii902x_mode_valid,
 320 };
 321
 322 static void sii902x_bridge_disable(struct drm_bridge *bridge)
 323 {
 324         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 325
 326         mutex_lock(&sii902x->mutex);
 327
 328         regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 329                            SII902X_SYS_CTRL_PWR_DWN,
 330                            SII902X_SYS_CTRL_PWR_DWN);
 331
 332         mutex_unlock(&sii902x->mutex);
 333 }
 334
 335 static void sii902x_bridge_enable(struct drm_bridge *bridge)
 336 {
 337         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 338
 339         mutex_lock(&sii902x->mutex);
 340
 341         regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
 342                            SII902X_AVI_POWER_STATE_MSK,
 343                            SII902X_AVI_POWER_STATE_D(0));
 344         regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 345                            SII902X_SYS_CTRL_PWR_DWN, 0);
 346
 347         mutex_unlock(&sii902x->mutex);
 348 }
 349
 350 static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
 351                                     const struct drm_display_mode *mode,
 352                                     const struct drm_display_mode *adj)
 353 {
 354         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 355         struct regmap *regmap = sii902x->regmap;
 356         u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
 357         struct hdmi_avi_infoframe frame;
 358         u16 pixel_clock_10kHz = adj->clock / 10;
 359         int ret;
 360
 361         buf[0] = pixel_clock_10kHz & 0xff;
 362         buf[1] = pixel_clock_10kHz >> 8;
 363         buf[2] = adj->vrefresh;
 364         buf[3] = 0x00;
 365         buf[4] = adj->hdisplay;
 366         buf[5] = adj->hdisplay >> 8;
 367         buf[6] = adj->vdisplay;
 368         buf[7] = adj->vdisplay >> 8;
 369         buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
 370                  SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
 371         buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
 372                  SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
 373
 374         mutex_lock(&sii902x->mutex);
 375
 376         ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
 377         if (ret)
 378                 goto out;
 379
 380         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
 381                                                        &sii902x->connector, adj);
 382         if (ret < 0) {
 383                 DRM_ERROR("couldn't fill AVI infoframe\n");
 384                 goto out;
 385         }
 386
 387         ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
 388         if (ret < 0) {
 389                 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
 390                 goto out;
 391         }
 392
 393         /* Do not send the infoframe header, but keep the CRC field. */
 394         regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
 395                           buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
 396                           HDMI_AVI_INFOFRAME_SIZE + 1);
 397
 398 out:
 399         mutex_unlock(&sii902x->mutex);
 400 }
 401
 402 static int sii902x_bridge_attach(struct drm_bridge *bridge)
 403 {
 404         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 405         struct drm_device *drm = bridge->dev;
 406         int ret;
 407
 408         drm_connector_helper_add(&sii902x->connector,
 409                                  &sii902x_connector_helper_funcs);
 410
 411         if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
 412                 dev_err(&sii902x->i2c->dev,
 413                         "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
 414                 return -ENOTSUPP;
 415         }
 416
 417         ret = drm_connector_init(drm, &sii902x->connector,
 418                                  &sii902x_connector_funcs,
 419                                  DRM_MODE_CONNECTOR_HDMIA);
 420         if (ret)
 421                 return ret;
 422
 423         if (sii902x->i2c->irq > 0)
 424                 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
 425         else
 426                 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
 427
 428         drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
 429
 430         return 0;
 431 }
 432
 433 static const struct drm_bridge_funcs sii902x_bridge_funcs = {
 434         .attach = sii902x_bridge_attach,
 435         .mode_set = sii902x_bridge_mode_set,
 436         .disable = sii902x_bridge_disable,
 437         .enable = sii902x_bridge_enable,
 438 };
 439
 440 static int sii902x_mute(struct sii902x *sii902x, bool mute)
 441 {
 442         struct device *dev = &sii902x->i2c->dev;
 443         unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
 444                 SII902X_TPI_AUDIO_MUTE_DISABLE;
 445
 446         dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
 447
 448         return regmap_update_bits(sii902x->regmap,
 449                                   SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
 450                                   SII902X_TPI_AUDIO_MUTE_ENABLE, val);
 451 }
 452
 453 static const int sii902x_mclk_div_table[] = {
 454         128, 256, 384, 512, 768, 1024, 1152, 192 };
 455
 456 static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
 457                                    unsigned int mclk)
 458 {
 459         int div = mclk / rate;
 460         int distance = 100000;
 461         u8 i, nearest = 0;
 462
 463         for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
 464                 unsigned int d = abs(div - sii902x_mclk_div_table[i]);
 465
 466                 if (d >= distance)
 467                         continue;
 468
 469                 nearest = i;
 470                 distance = d;
 471                 if (d == 0)
 472                         break;
 473         }
 474
 475         *i2s_config_reg |= nearest << 4;
 476
 477         return sii902x_mclk_div_table[nearest];
 478 }
 479
 480 static const struct sii902x_sample_freq {
 481         u32 freq;
 482         u8 val;
 483 } sii902x_sample_freq[] = {
 484         { .freq = 32000,        .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
 485         { .freq = 44000,        .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
 486         { .freq = 48000,        .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
 487         { .freq = 88000,        .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
 488         { .freq = 96000,        .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
 489         { .freq = 176000,       .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
 490         { .freq = 192000,       .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
 491 };
 492
 493 static int sii902x_audio_hw_params(struct device *dev, void *data,
 494                                    struct hdmi_codec_daifmt *daifmt,
 495                                    struct hdmi_codec_params *params)
 496 {
 497         struct sii902x *sii902x = dev_get_drvdata(dev);
 498         u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
 499         u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
 500                                SII902X_TPI_AUDIO_MUTE_ENABLE |
 501                                SII902X_TPI_AUDIO_CODING_PCM);
 502         u8 config_byte3_reg = 0;
 503         u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
 504         unsigned long mclk_rate;
 505         int i, ret;
 506
 507         if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
 508                 dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
 509                 return -EINVAL;
 510         }
 511
 512         switch (daifmt->fmt) {
 513         case HDMI_I2S:
 514                 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
 515                         SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
 516                 break;
 517         case HDMI_RIGHT_J:
 518                 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
 519                 break;
 520         case HDMI_LEFT_J:
 521                 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
 522                 break;
 523         default:
 524                 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
 525                         daifmt->fmt);
 526                 return -EINVAL;
 527         }
 528
 529         if (daifmt->bit_clk_inv)
 530                 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
 531         else
 532                 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
 533
 534         if (daifmt->frame_clk_inv)
 535                 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
 536         else
 537                 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
 538
 539         if (params->channels > 2)
 540                 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
 541         else
 542                 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
 543
 544         switch (params->sample_width) {
 545         case 16:
 546                 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
 547                 break;
 548         case 20:
 549                 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
 550                 break;
 551         case 24:
 552         case 32:
 553                 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
 554                 break;
 555         default:
 556                 dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
 557                         params->sample_width);
 558                 return -EINVAL;
 559         }
 560
 561         for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
 562                 if (params->sample_rate == sii902x_sample_freq[i].freq) {
 563                         config_byte3_reg |= sii902x_sample_freq[i].val;
 564                         break;
 565                 }
 566         }
 567
 568         ret = clk_prepare_enable(sii902x->audio.mclk);
 569         if (ret) {
 570                 dev_err(dev, "Enabling mclk failed: %d\n", ret);
 571                 return ret;
 572         }
 573
 574         if (sii902x->audio.mclk) {
 575                 mclk_rate = clk_get_rate(sii902x->audio.mclk);
 576                 ret = sii902x_select_mclk_div(&i2s_config_reg,
 577                                               params->sample_rate, mclk_rate);
 578                 if (mclk_rate != ret * params->sample_rate)
 579                         dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
 580                                 mclk_rate, ret, params->sample_rate);
 581         }
 582
 583         mutex_lock(&sii902x->mutex);
 584
 585         ret = regmap_write(sii902x->regmap,
 586                            SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
 587                            config_byte2_reg);
 588         if (ret < 0)
 589                 goto out;
 590
 591         ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
 592                            i2s_config_reg);
 593         if (ret)
 594                 goto out;
 595
 596         for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
 597                     sii902x->audio.i2s_fifo_sequence[i]; i++)
 598                 regmap_write(sii902x->regmap,
 599                              SII902X_TPI_I2S_ENABLE_MAPPING_REG,
 600                              sii902x->audio.i2s_fifo_sequence[i]);
 601
 602         ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
 603                            config_byte3_reg);
 604         if (ret)
 605                 goto out;
 606
 607         ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
 608                                 params->iec.status,
 609                                 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
 610                                     sizeof(params->iec.status)));
 611         if (ret)
 612                 goto out;
 613
 614         ret = hdmi_audio_infoframe_pack(&params->cea, infoframe_buf,
 615                                         sizeof(infoframe_buf));
 616         if (ret < 0) {
 617                 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
 618                         __func__, ret);
 619                 goto out;
 620         }
 621
 622         ret = regmap_bulk_write(sii902x->regmap,
 623                                 SII902X_TPI_MISC_INFOFRAME_BASE,
 624                                 infoframe_buf,
 625                                 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
 626         if (ret)
 627                 goto out;
 628
 629         /* Decode Level 0 Packets */
 630         ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
 631         if (ret)
 632                 goto out;
 633
 634         ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
 635         if (ret)
 636                 goto out;
 637
 638         ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
 639         if (ret)
 640                 goto out;
 641
 642         dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
 643 out:
 644         mutex_unlock(&sii902x->mutex);
 645
 646         if (ret) {
 647                 clk_disable_unprepare(sii902x->audio.mclk);
 648                 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
 649                         ret);
 650         }
 651
 652         return ret;
 653 }
 654
 655 static void sii902x_audio_shutdown(struct device *dev, void *data)
 656 {
 657         struct sii902x *sii902x = dev_get_drvdata(dev);
 658
 659         mutex_lock(&sii902x->mutex);
 660
 661         regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
 662                      SII902X_TPI_AUDIO_INTERFACE_DISABLE);
 663
 664         mutex_unlock(&sii902x->mutex);
 665
 666         clk_disable_unprepare(sii902x->audio.mclk);
 667 }
 668
 669 static int sii902x_audio_digital_mute(struct device *dev,
 670                                       void *data, bool enable)
 671 {
 672         struct sii902x *sii902x = dev_get_drvdata(dev);
 673
 674         mutex_lock(&sii902x->mutex);
 675
 676         sii902x_mute(sii902x, enable);
 677
 678         mutex_unlock(&sii902x->mutex);
 679
 680         return 0;
 681 }
 682
 683 static int sii902x_audio_get_eld(struct device *dev, void *data,
 684                                  uint8_t *buf, size_t len)
 685 {
 686         struct sii902x *sii902x = dev_get_drvdata(dev);
 687
 688         mutex_lock(&sii902x->mutex);
 689
 690         memcpy(buf, sii902x->connector.eld,
 691                min(sizeof(sii902x->connector.eld), len));
 692
 693         mutex_unlock(&sii902x->mutex);
 694
 695         return 0;
 696 }
 697
 698 static int sii902x_audio_get_dai_id(struct snd_soc_component *component,
 699                                     struct device_node *endpoint)
 700 {
 701         struct of_endpoint of_ep;
 702         int ret;
 703
 704         ret = of_graph_parse_endpoint(endpoint, &of_ep);
 705         if (ret < 0)
 706                 return ret;
 707
 708         /*
 709          * HDMI sound should be located at reg = <3>
 710          * Return expected DAI index 0.
 711          */
 712         if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
 713                 return 0;
 714
 715         return -EINVAL;
 716 }
 717
 718 static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
 719         .hw_params = sii902x_audio_hw_params,
 720         .audio_shutdown = sii902x_audio_shutdown,
 721         .digital_mute = sii902x_audio_digital_mute,
 722         .get_eld = sii902x_audio_get_eld,
 723         .get_dai_id = sii902x_audio_get_dai_id,
 724 };
 725
 726 static int sii902x_audio_codec_init(struct sii902x *sii902x,
 727                                     struct device *dev)
 728 {
 729         static const u8 audio_fifo_id[] = {
 730                 SII902X_TPI_I2S_CONFIG_FIFO0,
 731                 SII902X_TPI_I2S_CONFIG_FIFO1,
 732                 SII902X_TPI_I2S_CONFIG_FIFO2,
 733                 SII902X_TPI_I2S_CONFIG_FIFO3,
 734         };
 735         static const u8 i2s_lane_id[] = {
 736                 SII902X_TPI_I2S_SELECT_SD0,
 737                 SII902X_TPI_I2S_SELECT_SD1,
 738                 SII902X_TPI_I2S_SELECT_SD2,
 739                 SII902X_TPI_I2S_SELECT_SD3,
 740         };
 741         struct hdmi_codec_pdata codec_data = {
 742                 .ops = &sii902x_audio_codec_ops,
 743                 .i2s = 1, /* Only i2s support for now. */
 744                 .spdif = 0,
 745                 .max_i2s_channels = 0,
 746         };
 747         u8 lanes[4];
 748         int num_lanes, i;
 749
 750         if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
 751                 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
 752                         __func__);
 753                 return 0;
 754         }
 755
 756         num_lanes = of_property_read_variable_u8_array(dev->of_node,
 757                                                        "sil,i2s-data-lanes",
 758                                                        lanes, 1,
 759                                                        ARRAY_SIZE(lanes));
 760
 761         if (num_lanes == -EINVAL) {
 762                 dev_dbg(dev,
 763                         "%s: No \"sil,i2s-data-lanes\", use default <0>\n",
 764                         __func__);
 765                 num_lanes = 1;
 766                 lanes[0] = 0;
 767         } else if (num_lanes < 0) {
 768                 dev_err(dev,
 769                         "%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
 770                         __func__, num_lanes);
 771                 return num_lanes;
 772         }
 773         codec_data.max_i2s_channels = 2 * num_lanes;
 774
 775         for (i = 0; i < num_lanes; i++)
 776                 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
 777                         i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
 778
 779         sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
 780         if (IS_ERR(sii902x->audio.mclk)) {
 781                 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
 782                         __func__, PTR_ERR(sii902x->audio.mclk));
 783                 return PTR_ERR(sii902x->audio.mclk);
 784         }
 785
 786         sii902x->audio.pdev = platform_device_register_data(
 787                 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
 788                 &codec_data, sizeof(codec_data));
 789
 790         return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
 791 }
 792
 793 static const struct regmap_range sii902x_volatile_ranges[] = {
 794         { .range_min = 0, .range_max = 0xff },
 795 };
 796
 797 static const struct regmap_access_table sii902x_volatile_table = {
 798         .yes_ranges = sii902x_volatile_ranges,
 799         .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
 800 };
 801
 802 static const struct regmap_config sii902x_regmap_config = {
 803         .reg_bits = 8,
 804         .val_bits = 8,
 805         .disable_locking = true, /* struct sii902x mutex should be enough */
 806         .max_register = SII902X_TPI_MISC_INFOFRAME_END,
 807         .volatile_table = &sii902x_volatile_table,
 808         .cache_type = REGCACHE_NONE,
 809 };
 810
 811 static irqreturn_t sii902x_interrupt(int irq, void *data)
 812 {
 813         struct sii902x *sii902x = data;
 814         unsigned int status = 0;
 815
 816         mutex_lock(&sii902x->mutex);
 817
 818         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 819         regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
 820
 821         mutex_unlock(&sii902x->mutex);
 822
 823         if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
 824                 drm_helper_hpd_irq_event(sii902x->bridge.dev);
 825
 826         return IRQ_HANDLED;
 827 }
 828
 829 /*
 830  * The purpose of sii902x_i2c_bypass_select is to enable the pass through
 831  * mode of the HDMI transmitter. Do not use regmap from within this function,
 832  * only use sii902x_*_unlocked functions to read/modify/write registers.
 833  * We are holding the parent adapter lock here, keep this in mind before
 834  * adding more i2c transactions.
 835  *
 836  * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
 837  * in this driver, we need to make sure that we only touch 0x1A[2:1] from
 838  * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
 839  * we leave the remaining bits as we have found them.
 840  */
 841 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
 842 {
 843         struct sii902x *sii902x = i2c_mux_priv(mux);
 844         struct device *dev = &sii902x->i2c->dev;
 845         unsigned long timeout;
 846         u8 status;
 847         int ret;
 848
 849         ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 850                                            SII902X_SYS_CTRL_DDC_BUS_REQ,
 851                                            SII902X_SYS_CTRL_DDC_BUS_REQ);
 852         if (ret)
 853                 return ret;
 854
 855         timeout = jiffies +
 856                   msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
 857         do {
 858                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 859                                             &status);
 860                 if (ret)
 861                         return ret;
 862         } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
 863                  time_before(jiffies, timeout));
 864
 865         if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
 866                 dev_err(dev, "Failed to acquire the i2c bus\n");
 867                 return -ETIMEDOUT;
 868         }
 869
 870         return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 871                                       status);
 872 }
 873
 874 /*
 875  * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
 876  * mode of the HDMI transmitter. Do not use regmap from within this function,
 877  * only use sii902x_*_unlocked functions to read/modify/write registers.
 878  * We are holding the parent adapter lock here, keep this in mind before
 879  * adding more i2c transactions.
 880  *
 881  * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
 882  * in this driver, we need to make sure that we only touch 0x1A[2:1] from
 883  * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
 884  * we leave the remaining bits as we have found them.
 885  */
 886 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
 887 {
 888         struct sii902x *sii902x = i2c_mux_priv(mux);
 889         struct device *dev = &sii902x->i2c->dev;
 890         unsigned long timeout;
 891         unsigned int retries;
 892         u8 status;
 893         int ret;
 894
 895         /*
 896          * When the HDMI transmitter is in pass through mode, we need an
 897          * (undocumented) additional delay between STOP and START conditions
 898          * to guarantee the bus won't get stuck.
 899          */
 900         udelay(30);
 901
 902         /*
 903          * Sometimes the I2C bus can stall after failure to use the
 904          * EDID channel. Retry a few times to see if things clear
 905          * up, else continue anyway.
 906          */
 907         retries = 5;
 908         do {
 909                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 910                                             &status);
 911                 retries--;
 912         } while (ret && retries);
 913         if (ret) {
 914                 dev_err(dev, "failed to read status (%d)\n", ret);
 915                 return ret;
 916         }
 917
 918         ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 919                                            SII902X_SYS_CTRL_DDC_BUS_REQ |
 920                                            SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
 921         if (ret)
 922                 return ret;
 923
 924         timeout = jiffies +
 925                   msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
 926         do {
 927                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 928                                             &status);
 929                 if (ret)
 930                         return ret;
 931         } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
 932                            SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
 933                  time_before(jiffies, timeout));
 934
 935         if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
 936                       SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
 937                 dev_err(dev, "failed to release the i2c bus\n");
 938                 return -ETIMEDOUT;
 939         }
 940
 941         return 0;
 942 }
 943
 944 static const struct drm_bridge_timings default_sii902x_timings = {
 945         .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
 946                  | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
 947                  | DRM_BUS_FLAG_DE_HIGH,
 948 };
 949
 950 static int sii902x_probe(struct i2c_client *client,
 951                          const struct i2c_device_id *id)
 952 {
 953         struct device *dev = &client->dev;
 954         unsigned int status = 0;
 955         struct sii902x *sii902x;
 956         u8 chipid[4];
 957         int ret;
 958
 959         ret = i2c_check_functionality(client->adapter,
 960                                       I2C_FUNC_SMBUS_BYTE_DATA);
 961         if (!ret) {
 962                 dev_err(dev, "I2C adapter not suitable\n");
 963                 return -EIO;
 964         }
 965
 966         sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
 967         if (!sii902x)
 968                 return -ENOMEM;
 969
 970         sii902x->i2c = client;
 971         sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
 972         if (IS_ERR(sii902x->regmap))
 973                 return PTR_ERR(sii902x->regmap);
 974
 975         sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
 976                                                       GPIOD_OUT_LOW);
 977         if (IS_ERR(sii902x->reset_gpio)) {
 978                 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
 979                         PTR_ERR(sii902x->reset_gpio));
 980                 return PTR_ERR(sii902x->reset_gpio);
 981         }
 982
 983         mutex_init(&sii902x->mutex);
 984
 985         sii902x_reset(sii902x);
 986
 987         ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
 988         if (ret)
 989                 return ret;
 990
 991         ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
 992                                &chipid, 4);
 993         if (ret) {
 994                 dev_err(dev, "regmap_read failed %d\n", ret);
 995                 return ret;
 996         }
 997
 998         if (chipid[0] != 0xb0) {
 999                 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
1000                         chipid[0]);
1001                 return -EINVAL;
1002         }
1003
1004         /* Clear all pending interrupts */
1005         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
1006         regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
1007
1008         if (client->irq > 0) {
1009                 regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
1010                              SII902X_HOTPLUG_EVENT);
1011
1012                 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1013                                                 sii902x_interrupt,
1014                                                 IRQF_ONESHOT, dev_name(dev),
1015                                                 sii902x);
1016                 if (ret)
1017                         return ret;
1018         }
1019
1020         sii902x->bridge.funcs = &sii902x_bridge_funcs;
1021         sii902x->bridge.of_node = dev->of_node;
1022         sii902x->bridge.timings = &default_sii902x_timings;
1023         drm_bridge_add(&sii902x->bridge);
1024
1025         sii902x_audio_codec_init(sii902x, dev);
1026
1027         i2c_set_clientdata(client, sii902x);
1028
1029         sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
1030                                         1, 0, I2C_MUX_GATE,
1031                                         sii902x_i2c_bypass_select,
1032                                         sii902x_i2c_bypass_deselect);
1033         if (!sii902x->i2cmux)
1034                 return -ENOMEM;
1035
1036         sii902x->i2cmux->priv = sii902x;
1037         return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
1038 }
1039
1040 static int sii902x_remove(struct i2c_client *client)
1041
1042 {
1043         struct sii902x *sii902x = i2c_get_clientdata(client);
1044
1045         i2c_mux_del_adapters(sii902x->i2cmux);
1046         drm_bridge_remove(&sii902x->bridge);
1047
1048         return 0;
1049 }
1050
1051 static const struct of_device_id sii902x_dt_ids[] = {
1052         { .compatible = "sil,sii9022", },
1053         { }
1054 };
1055 MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
1056
1057 static const struct i2c_device_id sii902x_i2c_ids[] = {
1058         { "sii9022", 0 },
1059         { },
1060 };
1061 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
1062
1063 static struct i2c_driver sii902x_driver = {
1064         .probe = sii902x_probe,
1065         .remove = sii902x_remove,
1066         .driver = {
1067                 .name = "sii902x",
1068                 .of_match_table = sii902x_dt_ids,
1069         },
1070         .id_table = sii902x_i2c_ids,
1071 };
1072 module_i2c_driver(sii902x_driver);
1073
1074 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
1075 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
1076 MODULE_LICENSE("GPL");