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/media-bus-format.h> 19 #include <linux/module.h> 20 #include <linux/regmap.h> 21 #include <linux/regulator/consumer.h> 22 #include <linux/clk.h> 23 24 #include <drm/drm_atomic_helper.h> 25 #include <drm/drm_bridge.h> 26 #include <drm/drm_drv.h> 27 #include <drm/drm_edid.h> 28 #include <drm/drm_print.h> 29 #include <drm/drm_probe_helper.h> 30 31 #include <sound/hdmi-codec.h> 32 33 #define SII902X_TPI_VIDEO_DATA 0x0 34 35 #define SII902X_TPI_PIXEL_REPETITION 0x8 36 #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5) 37 #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4) 38 #define SII902X_TPI_AVI_PIXEL_REP_4X 3 39 #define SII902X_TPI_AVI_PIXEL_REP_2X 1 40 #define SII902X_TPI_AVI_PIXEL_REP_NONE 0 41 #define SII902X_TPI_CLK_RATIO_HALF (0 << 6) 42 #define SII902X_TPI_CLK_RATIO_1X (1 << 6) 43 #define SII902X_TPI_CLK_RATIO_2X (2 << 6) 44 #define SII902X_TPI_CLK_RATIO_4X (3 << 6) 45 46 #define SII902X_TPI_AVI_IN_FORMAT 0x9 47 #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7) 48 #define SII902X_TPI_AVI_INPUT_DITHER BIT(6) 49 #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2) 50 #define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2) 51 #define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2) 52 #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0) 53 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0) 54 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0) 55 #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0) 56 57 #define SII902X_TPI_AVI_INFOFRAME 0x0c 58 59 #define SII902X_SYS_CTRL_DATA 0x1a 60 #define SII902X_SYS_CTRL_PWR_DWN BIT(4) 61 #define SII902X_SYS_CTRL_AV_MUTE BIT(3) 62 #define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2) 63 #define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1) 64 #define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0) 65 #define SII902X_SYS_CTRL_OUTPUT_HDMI 1 66 #define SII902X_SYS_CTRL_OUTPUT_DVI 0 67 68 #define SII902X_REG_CHIPID(n) (0x1b + (n)) 69 70 #define SII902X_PWR_STATE_CTRL 0x1e 71 #define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0) 72 #define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK) 73 74 /* Audio */ 75 #define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f 76 #define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0) 77 #define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0) 78 #define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0) 79 #define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0) 80 #define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2) 81 #define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3) 82 #define SII902X_TPI_I2S_SELECT_SD0 (0 << 4) 83 #define SII902X_TPI_I2S_SELECT_SD1 (1 << 4) 84 #define SII902X_TPI_I2S_SELECT_SD2 (2 << 4) 85 #define SII902X_TPI_I2S_SELECT_SD3 (3 << 4) 86 #define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7) 87 88 #define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20 89 #define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0) 90 #define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0) 91 #define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1) 92 #define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1) 93 #define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2) 94 #define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2) 95 #define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3) 96 #define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3) 97 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4) 98 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4) 99 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4) 100 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4) 101 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4) 102 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4) 103 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4) 104 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4) 105 #define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7) 106 #define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7) 107 108 #define SII902X_TPI_I2S_STRM_HDR_BASE 0x21 109 #define SII902X_TPI_I2S_STRM_HDR_SIZE 5 110 111 #define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26 112 #define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0) 113 #define SII902X_TPI_AUDIO_CODING_PCM (1 << 0) 114 #define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0) 115 #define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0) 116 #define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0) 117 #define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0) 118 #define SII902X_TPI_AUDIO_CODING_AAC (6 << 0) 119 #define SII902X_TPI_AUDIO_CODING_DTS (7 << 0) 120 #define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0) 121 #define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4) 122 #define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4) 123 #define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5) 124 #define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5) 125 #define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6) 126 #define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6) 127 #define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6) 128 129 #define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27 130 #define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3) 131 #define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3) 132 #define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3) 133 #define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3) 134 #define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3) 135 #define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3) 136 #define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3) 137 #define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3) 138 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6) 139 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6) 140 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6) 141 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6) 142 143 #define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28 144 145 #define SII902X_INT_ENABLE 0x3c 146 #define SII902X_INT_STATUS 0x3d 147 #define SII902X_HOTPLUG_EVENT BIT(0) 148 #define SII902X_PLUGGED_STATUS BIT(2) 149 150 #define SII902X_REG_TPI_RQB 0xc7 151 152 /* Indirect internal register access */ 153 #define SII902X_IND_SET_PAGE 0xbc 154 #define SII902X_IND_OFFSET 0xbd 155 #define SII902X_IND_VALUE 0xbe 156 157 #define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf 158 #define SII902X_TPI_MISC_INFOFRAME_END 0xde 159 #define SII902X_TPI_MISC_INFOFRAME_SIZE \ 160 (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE) 161 162 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500 163 164 #define SII902X_AUDIO_PORT_INDEX 3 165 166 /* 167 * The maximum resolution supported by the HDMI bridge is 1080p@60Hz 168 * and 1920x1200 requiring a pixel clock of 165MHz and the minimum 169 * resolution supported is 480p@60Hz requiring a pixel clock of 25MHz 170 */ 171 #define SII902X_MIN_PIXEL_CLOCK_KHZ 25000 172 #define SII902X_MAX_PIXEL_CLOCK_KHZ 165000 173 174 struct sii902x { 175 struct i2c_client *i2c; 176 struct regmap *regmap; 177 struct drm_bridge bridge; 178 struct drm_bridge *next_bridge; 179 struct drm_connector connector; 180 struct gpio_desc *reset_gpio; 181 struct i2c_mux_core *i2cmux; 182 bool sink_is_hdmi; 183 u32 bus_width; 184 185 /* 186 * Mutex protects audio and video functions from interfering 187 * each other, by keeping their i2c command sequences atomic. 188 */ 189 struct mutex mutex; 190 struct sii902x_audio { 191 struct platform_device *pdev; 192 struct clk *mclk; 193 u32 i2s_fifo_sequence[4]; 194 } audio; 195 }; 196 197 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val) 198 { 199 union i2c_smbus_data data; 200 int ret; 201 202 ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, 203 I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data); 204 205 if (ret < 0) 206 return ret; 207 208 *val = data.byte; 209 return 0; 210 } 211 212 static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val) 213 { 214 union i2c_smbus_data data; 215 216 data.byte = val; 217 218 return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, 219 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA, 220 &data); 221 } 222 223 static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask, 224 u8 val) 225 { 226 int ret; 227 u8 status; 228 229 ret = sii902x_read_unlocked(i2c, reg, &status); 230 if (ret) 231 return ret; 232 status &= ~mask; 233 status |= val & mask; 234 return sii902x_write_unlocked(i2c, reg, status); 235 } 236 237 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge) 238 { 239 return container_of(bridge, struct sii902x, bridge); 240 } 241 242 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con) 243 { 244 return container_of(con, struct sii902x, connector); 245 } 246 247 static void sii902x_reset(struct sii902x *sii902x) 248 { 249 if (!sii902x->reset_gpio) 250 return; 251 252 gpiod_set_value_cansleep(sii902x->reset_gpio, 1); 253 254 /* The datasheet says treset-min = 100us. Make it 150us to be sure. */ 255 usleep_range(150, 200); 256 257 gpiod_set_value_cansleep(sii902x->reset_gpio, 0); 258 } 259 260 static enum drm_connector_status sii902x_detect(struct sii902x *sii902x) 261 { 262 unsigned int status; 263 264 mutex_lock(&sii902x->mutex); 265 266 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 267 268 mutex_unlock(&sii902x->mutex); 269 270 return (status & SII902X_PLUGGED_STATUS) ? 271 connector_status_connected : connector_status_disconnected; 272 } 273 274 static enum drm_connector_status 275 sii902x_connector_detect(struct drm_connector *connector, bool force) 276 { 277 struct sii902x *sii902x = connector_to_sii902x(connector); 278 279 return sii902x_detect(sii902x); 280 } 281 282 static const struct drm_connector_funcs sii902x_connector_funcs = { 283 .detect = sii902x_connector_detect, 284 .fill_modes = drm_helper_probe_single_connector_modes, 285 .destroy = drm_connector_cleanup, 286 .reset = drm_atomic_helper_connector_reset, 287 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 288 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 289 }; 290 291 static const struct drm_edid *sii902x_edid_read(struct sii902x *sii902x, 292 struct drm_connector *connector) 293 { 294 const struct drm_edid *drm_edid; 295 296 mutex_lock(&sii902x->mutex); 297 298 drm_edid = drm_edid_read_ddc(connector, sii902x->i2cmux->adapter[0]); 299 300 mutex_unlock(&sii902x->mutex); 301 302 return drm_edid; 303 } 304 305 static int sii902x_get_modes(struct drm_connector *connector) 306 { 307 struct sii902x *sii902x = connector_to_sii902x(connector); 308 const struct drm_edid *drm_edid; 309 int num = 0; 310 311 drm_edid = sii902x_edid_read(sii902x, connector); 312 drm_edid_connector_update(connector, drm_edid); 313 if (drm_edid) { 314 num = drm_edid_connector_add_modes(connector); 315 drm_edid_free(drm_edid); 316 } 317 318 sii902x->sink_is_hdmi = connector->display_info.is_hdmi; 319 320 return num; 321 } 322 323 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = { 324 .get_modes = sii902x_get_modes, 325 }; 326 327 static void sii902x_bridge_atomic_disable(struct drm_bridge *bridge, 328 struct drm_bridge_state *old_bridge_state) 329 { 330 struct sii902x *sii902x = bridge_to_sii902x(bridge); 331 332 mutex_lock(&sii902x->mutex); 333 334 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 335 SII902X_SYS_CTRL_PWR_DWN, 336 SII902X_SYS_CTRL_PWR_DWN); 337 338 mutex_unlock(&sii902x->mutex); 339 } 340 341 static void sii902x_bridge_atomic_enable(struct drm_bridge *bridge, 342 struct drm_bridge_state *old_bridge_state) 343 { 344 struct sii902x *sii902x = bridge_to_sii902x(bridge); 345 346 mutex_lock(&sii902x->mutex); 347 348 regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL, 349 SII902X_AVI_POWER_STATE_MSK, 350 SII902X_AVI_POWER_STATE_D(0)); 351 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 352 SII902X_SYS_CTRL_PWR_DWN, 0); 353 354 mutex_unlock(&sii902x->mutex); 355 } 356 357 static void sii902x_bridge_mode_set(struct drm_bridge *bridge, 358 const struct drm_display_mode *mode, 359 const struct drm_display_mode *adj) 360 { 361 struct sii902x *sii902x = bridge_to_sii902x(bridge); 362 u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI; 363 struct regmap *regmap = sii902x->regmap; 364 u8 buf[HDMI_INFOFRAME_SIZE(AVI)]; 365 struct hdmi_avi_infoframe frame; 366 u16 pixel_clock_10kHz = adj->clock / 10; 367 int ret; 368 369 if (sii902x->sink_is_hdmi) 370 output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI; 371 372 buf[0] = pixel_clock_10kHz & 0xff; 373 buf[1] = pixel_clock_10kHz >> 8; 374 buf[2] = drm_mode_vrefresh(adj); 375 buf[3] = 0x00; 376 buf[4] = adj->hdisplay; 377 buf[5] = adj->hdisplay >> 8; 378 buf[6] = adj->vdisplay; 379 buf[7] = adj->vdisplay >> 8; 380 buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE | 381 SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT; 382 buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO | 383 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB; 384 385 mutex_lock(&sii902x->mutex); 386 387 ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 388 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode); 389 if (ret) 390 goto out; 391 392 ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10); 393 if (ret) 394 goto out; 395 396 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, 397 &sii902x->connector, adj); 398 if (ret < 0) { 399 DRM_ERROR("couldn't fill AVI infoframe\n"); 400 goto out; 401 } 402 403 ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf)); 404 if (ret < 0) { 405 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); 406 goto out; 407 } 408 409 /* Do not send the infoframe header, but keep the CRC field. */ 410 regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME, 411 buf + HDMI_INFOFRAME_HEADER_SIZE - 1, 412 HDMI_AVI_INFOFRAME_SIZE + 1); 413 414 out: 415 mutex_unlock(&sii902x->mutex); 416 } 417 418 static int sii902x_bridge_attach(struct drm_bridge *bridge, 419 enum drm_bridge_attach_flags flags) 420 { 421 struct sii902x *sii902x = bridge_to_sii902x(bridge); 422 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 423 struct drm_device *drm = bridge->dev; 424 int ret; 425 426 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) 427 return drm_bridge_attach(bridge->encoder, sii902x->next_bridge, 428 bridge, flags); 429 430 drm_connector_helper_add(&sii902x->connector, 431 &sii902x_connector_helper_funcs); 432 433 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) { 434 dev_err(&sii902x->i2c->dev, 435 "sii902x driver is only compatible with DRM devices supporting atomic updates\n"); 436 return -ENOTSUPP; 437 } 438 439 ret = drm_connector_init(drm, &sii902x->connector, 440 &sii902x_connector_funcs, 441 DRM_MODE_CONNECTOR_HDMIA); 442 if (ret) 443 return ret; 444 445 if (sii902x->i2c->irq > 0) 446 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD; 447 else 448 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT; 449 450 ret = drm_display_info_set_bus_formats(&sii902x->connector.display_info, 451 &bus_format, 1); 452 if (ret) 453 return ret; 454 455 drm_connector_attach_encoder(&sii902x->connector, bridge->encoder); 456 457 return 0; 458 } 459 460 static enum drm_connector_status sii902x_bridge_detect(struct drm_bridge *bridge) 461 { 462 struct sii902x *sii902x = bridge_to_sii902x(bridge); 463 464 return sii902x_detect(sii902x); 465 } 466 467 static const struct drm_edid *sii902x_bridge_edid_read(struct drm_bridge *bridge, 468 struct drm_connector *connector) 469 { 470 struct sii902x *sii902x = bridge_to_sii902x(bridge); 471 472 return sii902x_edid_read(sii902x, connector); 473 } 474 475 static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 476 struct drm_bridge_state *bridge_state, 477 struct drm_crtc_state *crtc_state, 478 struct drm_connector_state *conn_state, 479 u32 output_fmt, 480 unsigned int *num_input_fmts) 481 { 482 483 struct sii902x *sii902x = bridge_to_sii902x(bridge); 484 u32 *input_fmts; 485 486 *num_input_fmts = 0; 487 488 input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL); 489 if (!input_fmts) 490 return NULL; 491 492 switch (sii902x->bus_width) { 493 case 16: 494 input_fmts[0] = MEDIA_BUS_FMT_RGB565_1X16; 495 break; 496 case 18: 497 input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X18; 498 break; 499 case 24: 500 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 501 break; 502 default: 503 return NULL; 504 } 505 506 *num_input_fmts = 1; 507 508 return input_fmts; 509 } 510 511 static int sii902x_bridge_atomic_check(struct drm_bridge *bridge, 512 struct drm_bridge_state *bridge_state, 513 struct drm_crtc_state *crtc_state, 514 struct drm_connector_state *conn_state) 515 { 516 if (crtc_state->mode.clock < SII902X_MIN_PIXEL_CLOCK_KHZ || 517 crtc_state->mode.clock > SII902X_MAX_PIXEL_CLOCK_KHZ) 518 return -EINVAL; 519 520 /* 521 * There might be flags negotiation supported in future but 522 * set the bus flags in atomic_check statically for now. 523 */ 524 bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags; 525 526 return 0; 527 } 528 529 static enum drm_mode_status 530 sii902x_bridge_mode_valid(struct drm_bridge *bridge, 531 const struct drm_display_info *info, 532 const struct drm_display_mode *mode) 533 { 534 if (mode->clock < SII902X_MIN_PIXEL_CLOCK_KHZ) 535 return MODE_CLOCK_LOW; 536 537 if (mode->clock > SII902X_MAX_PIXEL_CLOCK_KHZ) 538 return MODE_CLOCK_HIGH; 539 540 return MODE_OK; 541 } 542 543 static const struct drm_bridge_funcs sii902x_bridge_funcs = { 544 .attach = sii902x_bridge_attach, 545 .mode_set = sii902x_bridge_mode_set, 546 .atomic_disable = sii902x_bridge_atomic_disable, 547 .atomic_enable = sii902x_bridge_atomic_enable, 548 .detect = sii902x_bridge_detect, 549 .edid_read = sii902x_bridge_edid_read, 550 .atomic_reset = drm_atomic_helper_bridge_reset, 551 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 552 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 553 .atomic_get_input_bus_fmts = sii902x_bridge_atomic_get_input_bus_fmts, 554 .atomic_check = sii902x_bridge_atomic_check, 555 .mode_valid = sii902x_bridge_mode_valid, 556 }; 557 558 static int sii902x_mute(struct sii902x *sii902x, bool mute) 559 { 560 struct device *dev = &sii902x->i2c->dev; 561 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE : 562 SII902X_TPI_AUDIO_MUTE_DISABLE; 563 564 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted"); 565 566 return regmap_update_bits(sii902x->regmap, 567 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 568 SII902X_TPI_AUDIO_MUTE_ENABLE, val); 569 } 570 571 static const int sii902x_mclk_div_table[] = { 572 128, 256, 384, 512, 768, 1024, 1152, 192 }; 573 574 static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate, 575 unsigned int mclk) 576 { 577 int div = mclk / rate; 578 int distance = 100000; 579 u8 i, nearest = 0; 580 581 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) { 582 unsigned int d = abs(div - sii902x_mclk_div_table[i]); 583 584 if (d >= distance) 585 continue; 586 587 nearest = i; 588 distance = d; 589 if (d == 0) 590 break; 591 } 592 593 *i2s_config_reg |= nearest << 4; 594 595 return sii902x_mclk_div_table[nearest]; 596 } 597 598 static const struct sii902x_sample_freq { 599 u32 freq; 600 u8 val; 601 } sii902x_sample_freq[] = { 602 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ }, 603 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ }, 604 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ }, 605 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ }, 606 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ }, 607 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ }, 608 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ }, 609 }; 610 611 static int sii902x_audio_hw_params(struct device *dev, void *data, 612 struct hdmi_codec_daifmt *daifmt, 613 struct hdmi_codec_params *params) 614 { 615 struct sii902x *sii902x = dev_get_drvdata(dev); 616 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST; 617 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S | 618 SII902X_TPI_AUDIO_MUTE_ENABLE | 619 SII902X_TPI_AUDIO_CODING_PCM); 620 u8 config_byte3_reg = 0; 621 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)]; 622 unsigned long mclk_rate; 623 int i, ret; 624 625 if (daifmt->bit_clk_provider || daifmt->frame_clk_provider) { 626 dev_dbg(dev, "%s: I2S clock provider mode not supported\n", 627 __func__); 628 return -EINVAL; 629 } 630 631 switch (daifmt->fmt) { 632 case HDMI_I2S: 633 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES | 634 SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 635 break; 636 case HDMI_RIGHT_J: 637 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT; 638 break; 639 case HDMI_LEFT_J: 640 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 641 break; 642 default: 643 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__, 644 daifmt->fmt); 645 return -EINVAL; 646 } 647 648 if (daifmt->bit_clk_inv) 649 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING; 650 else 651 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING; 652 653 if (daifmt->frame_clk_inv) 654 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW; 655 else 656 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH; 657 658 if (params->channels > 2) 659 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS; 660 else 661 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS; 662 663 switch (params->sample_width) { 664 case 16: 665 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16; 666 break; 667 case 20: 668 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20; 669 break; 670 case 24: 671 case 32: 672 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24; 673 break; 674 default: 675 dev_err(dev, "%s: Unsupported sample width %u\n", __func__, 676 params->sample_width); 677 return -EINVAL; 678 } 679 680 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) { 681 if (params->sample_rate == sii902x_sample_freq[i].freq) { 682 config_byte3_reg |= sii902x_sample_freq[i].val; 683 break; 684 } 685 } 686 687 ret = clk_prepare_enable(sii902x->audio.mclk); 688 if (ret) { 689 dev_err(dev, "Enabling mclk failed: %d\n", ret); 690 return ret; 691 } 692 693 if (sii902x->audio.mclk) { 694 mclk_rate = clk_get_rate(sii902x->audio.mclk); 695 ret = sii902x_select_mclk_div(&i2s_config_reg, 696 params->sample_rate, mclk_rate); 697 if (mclk_rate != ret * params->sample_rate) 698 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n", 699 mclk_rate, ret, params->sample_rate); 700 } 701 702 mutex_lock(&sii902x->mutex); 703 704 ret = regmap_write(sii902x->regmap, 705 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 706 config_byte2_reg); 707 if (ret < 0) 708 goto out; 709 710 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG, 711 i2s_config_reg); 712 if (ret) 713 goto out; 714 715 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) && 716 sii902x->audio.i2s_fifo_sequence[i]; i++) 717 regmap_write(sii902x->regmap, 718 SII902X_TPI_I2S_ENABLE_MAPPING_REG, 719 sii902x->audio.i2s_fifo_sequence[i]); 720 721 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG, 722 config_byte3_reg); 723 if (ret) 724 goto out; 725 726 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE, 727 params->iec.status, 728 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE, 729 sizeof(params->iec.status))); 730 if (ret) 731 goto out; 732 733 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf, 734 sizeof(infoframe_buf)); 735 if (ret < 0) { 736 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n", 737 __func__, ret); 738 goto out; 739 } 740 741 ret = regmap_bulk_write(sii902x->regmap, 742 SII902X_TPI_MISC_INFOFRAME_BASE, 743 infoframe_buf, 744 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE)); 745 if (ret) 746 goto out; 747 748 /* Decode Level 0 Packets */ 749 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02); 750 if (ret) 751 goto out; 752 753 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24); 754 if (ret) 755 goto out; 756 757 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02); 758 if (ret) 759 goto out; 760 761 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__); 762 out: 763 mutex_unlock(&sii902x->mutex); 764 765 if (ret) { 766 clk_disable_unprepare(sii902x->audio.mclk); 767 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__, 768 ret); 769 } 770 771 return ret; 772 } 773 774 static void sii902x_audio_shutdown(struct device *dev, void *data) 775 { 776 struct sii902x *sii902x = dev_get_drvdata(dev); 777 778 mutex_lock(&sii902x->mutex); 779 780 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 781 SII902X_TPI_AUDIO_INTERFACE_DISABLE); 782 783 mutex_unlock(&sii902x->mutex); 784 785 clk_disable_unprepare(sii902x->audio.mclk); 786 } 787 788 static int sii902x_audio_mute(struct device *dev, void *data, 789 bool enable, int direction) 790 { 791 struct sii902x *sii902x = dev_get_drvdata(dev); 792 793 mutex_lock(&sii902x->mutex); 794 795 sii902x_mute(sii902x, enable); 796 797 mutex_unlock(&sii902x->mutex); 798 799 return 0; 800 } 801 802 static int sii902x_audio_get_eld(struct device *dev, void *data, 803 uint8_t *buf, size_t len) 804 { 805 struct sii902x *sii902x = dev_get_drvdata(dev); 806 807 mutex_lock(&sii902x->mutex); 808 809 memcpy(buf, sii902x->connector.eld, 810 min(sizeof(sii902x->connector.eld), len)); 811 812 mutex_unlock(&sii902x->mutex); 813 814 return 0; 815 } 816 817 static int sii902x_audio_get_dai_id(struct snd_soc_component *component, 818 struct device_node *endpoint) 819 { 820 struct of_endpoint of_ep; 821 int ret; 822 823 ret = of_graph_parse_endpoint(endpoint, &of_ep); 824 if (ret < 0) 825 return ret; 826 827 /* 828 * HDMI sound should be located at reg = <3> 829 * Return expected DAI index 0. 830 */ 831 if (of_ep.port == SII902X_AUDIO_PORT_INDEX) 832 return 0; 833 834 return -EINVAL; 835 } 836 837 static const struct hdmi_codec_ops sii902x_audio_codec_ops = { 838 .hw_params = sii902x_audio_hw_params, 839 .audio_shutdown = sii902x_audio_shutdown, 840 .mute_stream = sii902x_audio_mute, 841 .get_eld = sii902x_audio_get_eld, 842 .get_dai_id = sii902x_audio_get_dai_id, 843 .no_capture_mute = 1, 844 }; 845 846 static int sii902x_audio_codec_init(struct sii902x *sii902x, 847 struct device *dev) 848 { 849 static const u8 audio_fifo_id[] = { 850 SII902X_TPI_I2S_CONFIG_FIFO0, 851 SII902X_TPI_I2S_CONFIG_FIFO1, 852 SII902X_TPI_I2S_CONFIG_FIFO2, 853 SII902X_TPI_I2S_CONFIG_FIFO3, 854 }; 855 static const u8 i2s_lane_id[] = { 856 SII902X_TPI_I2S_SELECT_SD0, 857 SII902X_TPI_I2S_SELECT_SD1, 858 SII902X_TPI_I2S_SELECT_SD2, 859 SII902X_TPI_I2S_SELECT_SD3, 860 }; 861 struct hdmi_codec_pdata codec_data = { 862 .ops = &sii902x_audio_codec_ops, 863 .i2s = 1, /* Only i2s support for now. */ 864 .spdif = 0, 865 .max_i2s_channels = 0, 866 }; 867 u8 lanes[4]; 868 int num_lanes, i; 869 870 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) { 871 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n", 872 __func__); 873 return 0; 874 } 875 876 num_lanes = of_property_read_variable_u8_array(dev->of_node, 877 "sil,i2s-data-lanes", 878 lanes, 1, 879 ARRAY_SIZE(lanes)); 880 881 if (num_lanes == -EINVAL) { 882 dev_dbg(dev, 883 "%s: No \"sil,i2s-data-lanes\", use default <0>\n", 884 __func__); 885 num_lanes = 1; 886 lanes[0] = 0; 887 } else if (num_lanes < 0) { 888 dev_err(dev, 889 "%s: Error gettin \"sil,i2s-data-lanes\": %d\n", 890 __func__, num_lanes); 891 return num_lanes; 892 } 893 codec_data.max_i2s_channels = 2 * num_lanes; 894 895 for (i = 0; i < num_lanes; i++) 896 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] | 897 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE; 898 899 sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk"); 900 if (IS_ERR(sii902x->audio.mclk)) { 901 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n", 902 __func__, PTR_ERR(sii902x->audio.mclk)); 903 return PTR_ERR(sii902x->audio.mclk); 904 } 905 906 sii902x->audio.pdev = platform_device_register_data( 907 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 908 &codec_data, sizeof(codec_data)); 909 910 return PTR_ERR_OR_ZERO(sii902x->audio.pdev); 911 } 912 913 static const struct regmap_range sii902x_volatile_ranges[] = { 914 { .range_min = 0, .range_max = 0xff }, 915 }; 916 917 static const struct regmap_access_table sii902x_volatile_table = { 918 .yes_ranges = sii902x_volatile_ranges, 919 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges), 920 }; 921 922 static const struct regmap_config sii902x_regmap_config = { 923 .reg_bits = 8, 924 .val_bits = 8, 925 .disable_locking = true, /* struct sii902x mutex should be enough */ 926 .max_register = SII902X_TPI_MISC_INFOFRAME_END, 927 .volatile_table = &sii902x_volatile_table, 928 .cache_type = REGCACHE_NONE, 929 }; 930 931 static irqreturn_t sii902x_interrupt(int irq, void *data) 932 { 933 struct sii902x *sii902x = data; 934 unsigned int status = 0; 935 936 mutex_lock(&sii902x->mutex); 937 938 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 939 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 940 941 mutex_unlock(&sii902x->mutex); 942 943 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) { 944 drm_helper_hpd_irq_event(sii902x->bridge.dev); 945 drm_bridge_hpd_notify(&sii902x->bridge, (status & SII902X_PLUGGED_STATUS) 946 ? connector_status_connected 947 : connector_status_disconnected); 948 } 949 950 return IRQ_HANDLED; 951 } 952 953 /* 954 * The purpose of sii902x_i2c_bypass_select is to enable the pass through 955 * mode of the HDMI transmitter. Do not use regmap from within this function, 956 * only use sii902x_*_unlocked functions to read/modify/write registers. 957 * We are holding the parent adapter lock here, keep this in mind before 958 * adding more i2c transactions. 959 * 960 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 961 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 962 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 963 * we leave the remaining bits as we have found them. 964 */ 965 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id) 966 { 967 struct sii902x *sii902x = i2c_mux_priv(mux); 968 struct device *dev = &sii902x->i2c->dev; 969 unsigned long timeout; 970 u8 status; 971 int ret; 972 973 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 974 SII902X_SYS_CTRL_DDC_BUS_REQ, 975 SII902X_SYS_CTRL_DDC_BUS_REQ); 976 if (ret) 977 return ret; 978 979 timeout = jiffies + 980 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 981 do { 982 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 983 &status); 984 if (ret) 985 return ret; 986 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) && 987 time_before(jiffies, timeout)); 988 989 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 990 dev_err(dev, "Failed to acquire the i2c bus\n"); 991 return -ETIMEDOUT; 992 } 993 994 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 995 status); 996 } 997 998 /* 999 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through 1000 * mode of the HDMI transmitter. Do not use regmap from within this function, 1001 * only use sii902x_*_unlocked functions to read/modify/write registers. 1002 * We are holding the parent adapter lock here, keep this in mind before 1003 * adding more i2c transactions. 1004 * 1005 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 1006 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 1007 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 1008 * we leave the remaining bits as we have found them. 1009 */ 1010 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id) 1011 { 1012 struct sii902x *sii902x = i2c_mux_priv(mux); 1013 struct device *dev = &sii902x->i2c->dev; 1014 unsigned long timeout; 1015 unsigned int retries; 1016 u8 status; 1017 int ret; 1018 1019 /* 1020 * When the HDMI transmitter is in pass through mode, we need an 1021 * (undocumented) additional delay between STOP and START conditions 1022 * to guarantee the bus won't get stuck. 1023 */ 1024 udelay(30); 1025 1026 /* 1027 * Sometimes the I2C bus can stall after failure to use the 1028 * EDID channel. Retry a few times to see if things clear 1029 * up, else continue anyway. 1030 */ 1031 retries = 5; 1032 do { 1033 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1034 &status); 1035 retries--; 1036 } while (ret && retries); 1037 if (ret) { 1038 dev_err(dev, "failed to read status (%d)\n", ret); 1039 return ret; 1040 } 1041 1042 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1043 SII902X_SYS_CTRL_DDC_BUS_REQ | 1044 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0); 1045 if (ret) 1046 return ret; 1047 1048 timeout = jiffies + 1049 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 1050 do { 1051 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1052 &status); 1053 if (ret) 1054 return ret; 1055 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 1056 SII902X_SYS_CTRL_DDC_BUS_GRTD) && 1057 time_before(jiffies, timeout)); 1058 1059 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 1060 SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 1061 dev_err(dev, "failed to release the i2c bus\n"); 1062 return -ETIMEDOUT; 1063 } 1064 1065 return 0; 1066 } 1067 1068 static const struct drm_bridge_timings default_sii902x_timings = { 1069 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 1070 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE 1071 | DRM_BUS_FLAG_DE_HIGH, 1072 }; 1073 1074 static int sii902x_init(struct sii902x *sii902x) 1075 { 1076 struct device *dev = &sii902x->i2c->dev; 1077 unsigned int status = 0; 1078 u8 chipid[4]; 1079 int ret; 1080 1081 sii902x_reset(sii902x); 1082 1083 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0); 1084 if (ret) 1085 return ret; 1086 1087 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0), 1088 &chipid, 4); 1089 if (ret) { 1090 dev_err(dev, "regmap_read failed %d\n", ret); 1091 return ret; 1092 } 1093 1094 if (chipid[0] != 0xb0) { 1095 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n", 1096 chipid[0]); 1097 return -EINVAL; 1098 } 1099 1100 /* Clear all pending interrupts */ 1101 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 1102 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 1103 1104 if (sii902x->i2c->irq > 0) { 1105 regmap_write(sii902x->regmap, SII902X_INT_ENABLE, 1106 SII902X_HOTPLUG_EVENT); 1107 1108 ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL, 1109 sii902x_interrupt, 1110 IRQF_ONESHOT, dev_name(dev), 1111 sii902x); 1112 if (ret) 1113 return ret; 1114 } 1115 1116 ret = sii902x_audio_codec_init(sii902x, dev); 1117 if (ret) 1118 return ret; 1119 1120 i2c_set_clientdata(sii902x->i2c, sii902x); 1121 1122 sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev, 1123 1, 0, I2C_MUX_GATE, 1124 sii902x_i2c_bypass_select, 1125 sii902x_i2c_bypass_deselect); 1126 if (!sii902x->i2cmux) { 1127 ret = -ENOMEM; 1128 goto err_unreg_audio; 1129 } 1130 1131 sii902x->i2cmux->priv = sii902x; 1132 ret = i2c_mux_add_adapter(sii902x->i2cmux, 0, 0); 1133 if (ret) 1134 goto err_unreg_audio; 1135 1136 sii902x->bridge.funcs = &sii902x_bridge_funcs; 1137 sii902x->bridge.of_node = dev->of_node; 1138 sii902x->bridge.timings = &default_sii902x_timings; 1139 sii902x->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 1140 1141 if (sii902x->i2c->irq > 0) 1142 sii902x->bridge.ops |= DRM_BRIDGE_OP_HPD; 1143 1144 drm_bridge_add(&sii902x->bridge); 1145 1146 return 0; 1147 1148 err_unreg_audio: 1149 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev)) 1150 platform_device_unregister(sii902x->audio.pdev); 1151 1152 return ret; 1153 } 1154 1155 static int sii902x_probe(struct i2c_client *client) 1156 { 1157 struct device *dev = &client->dev; 1158 struct device_node *endpoint; 1159 struct sii902x *sii902x; 1160 static const char * const supplies[] = {"iovcc", "cvcc12"}; 1161 int ret; 1162 1163 ret = i2c_check_functionality(client->adapter, 1164 I2C_FUNC_SMBUS_BYTE_DATA); 1165 if (!ret) { 1166 dev_err(dev, "I2C adapter not suitable\n"); 1167 return -EIO; 1168 } 1169 1170 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL); 1171 if (!sii902x) 1172 return -ENOMEM; 1173 1174 sii902x->i2c = client; 1175 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config); 1176 if (IS_ERR(sii902x->regmap)) 1177 return PTR_ERR(sii902x->regmap); 1178 1179 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset", 1180 GPIOD_OUT_LOW); 1181 if (IS_ERR(sii902x->reset_gpio)) { 1182 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n", 1183 PTR_ERR(sii902x->reset_gpio)); 1184 return PTR_ERR(sii902x->reset_gpio); 1185 } 1186 1187 sii902x->bus_width = 24; 1188 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); 1189 if (endpoint) 1190 of_property_read_u32(endpoint, "bus-width", &sii902x->bus_width); 1191 1192 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1); 1193 if (endpoint) { 1194 struct device_node *remote = of_graph_get_remote_port_parent(endpoint); 1195 1196 of_node_put(endpoint); 1197 if (!remote) { 1198 dev_err(dev, "Endpoint in port@1 unconnected\n"); 1199 return -ENODEV; 1200 } 1201 1202 if (!of_device_is_available(remote)) { 1203 dev_err(dev, "port@1 remote device is disabled\n"); 1204 of_node_put(remote); 1205 return -ENODEV; 1206 } 1207 1208 sii902x->next_bridge = of_drm_find_bridge(remote); 1209 of_node_put(remote); 1210 if (!sii902x->next_bridge) 1211 return dev_err_probe(dev, -EPROBE_DEFER, 1212 "Failed to find remote bridge\n"); 1213 } 1214 1215 mutex_init(&sii902x->mutex); 1216 1217 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(supplies), supplies); 1218 if (ret < 0) 1219 return dev_err_probe(dev, ret, "Failed to enable supplies"); 1220 1221 return sii902x_init(sii902x); 1222 } 1223 1224 static void sii902x_remove(struct i2c_client *client) 1225 { 1226 struct sii902x *sii902x = i2c_get_clientdata(client); 1227 1228 drm_bridge_remove(&sii902x->bridge); 1229 i2c_mux_del_adapters(sii902x->i2cmux); 1230 1231 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev)) 1232 platform_device_unregister(sii902x->audio.pdev); 1233 } 1234 1235 static const struct of_device_id sii902x_dt_ids[] = { 1236 { .compatible = "sil,sii9022", }, 1237 { } 1238 }; 1239 MODULE_DEVICE_TABLE(of, sii902x_dt_ids); 1240 1241 static const struct i2c_device_id sii902x_i2c_ids[] = { 1242 { "sii9022", 0 }, 1243 { }, 1244 }; 1245 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids); 1246 1247 static struct i2c_driver sii902x_driver = { 1248 .probe = sii902x_probe, 1249 .remove = sii902x_remove, 1250 .driver = { 1251 .name = "sii902x", 1252 .of_match_table = sii902x_dt_ids, 1253 }, 1254 .id_table = sii902x_i2c_ids, 1255 }; 1256 module_i2c_driver(sii902x_driver); 1257 1258 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); 1259 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges"); 1260 MODULE_LICENSE("GPL"); 1261