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