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 166struct sii902x { 167 struct i2c_client *i2c; 168 struct regmap *regmap; 169 struct drm_bridge bridge; 170 struct drm_bridge *next_bridge; 171 struct drm_connector connector; 172 struct gpio_desc *reset_gpio; 173 struct i2c_mux_core *i2cmux; 174 bool sink_is_hdmi; 175 /* 176 * Mutex protects audio and video functions from interfering 177 * each other, by keeping their i2c command sequences atomic. 178 */ 179 struct mutex mutex; 180 struct sii902x_audio { 181 struct platform_device *pdev; 182 struct clk *mclk; 183 u32 i2s_fifo_sequence[4]; 184 } audio; 185}; 186 187static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val) 188{ 189 union i2c_smbus_data data; 190 int ret; 191 192 ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, 193 I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data); 194 195 if (ret < 0) 196 return ret; 197 198 *val = data.byte; 199 return 0; 200} 201 202static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val) 203{ 204 union i2c_smbus_data data; 205 206 data.byte = val; 207 208 return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, 209 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA, 210 &data); 211} 212 213static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask, 214 u8 val) 215{ 216 int ret; 217 u8 status; 218 219 ret = sii902x_read_unlocked(i2c, reg, &status); 220 if (ret) 221 return ret; 222 status &= ~mask; 223 status |= val & mask; 224 return sii902x_write_unlocked(i2c, reg, status); 225} 226 227static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge) 228{ 229 return container_of(bridge, struct sii902x, bridge); 230} 231 232static inline struct sii902x *connector_to_sii902x(struct drm_connector *con) 233{ 234 return container_of(con, struct sii902x, connector); 235} 236 237static void sii902x_reset(struct sii902x *sii902x) 238{ 239 if (!sii902x->reset_gpio) 240 return; 241 242 gpiod_set_value_cansleep(sii902x->reset_gpio, 1); 243 244 /* The datasheet says treset-min = 100us. Make it 150us to be sure. */ 245 usleep_range(150, 200); 246 247 gpiod_set_value_cansleep(sii902x->reset_gpio, 0); 248} 249 250static enum drm_connector_status sii902x_detect(struct sii902x *sii902x) 251{ 252 unsigned int status; 253 254 mutex_lock(&sii902x->mutex); 255 256 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 257 258 mutex_unlock(&sii902x->mutex); 259 260 return (status & SII902X_PLUGGED_STATUS) ? 261 connector_status_connected : connector_status_disconnected; 262} 263 264static enum drm_connector_status 265sii902x_connector_detect(struct drm_connector *connector, bool force) 266{ 267 struct sii902x *sii902x = connector_to_sii902x(connector); 268 269 return sii902x_detect(sii902x); 270} 271 272static const struct drm_connector_funcs sii902x_connector_funcs = { 273 .detect = sii902x_connector_detect, 274 .fill_modes = drm_helper_probe_single_connector_modes, 275 .destroy = drm_connector_cleanup, 276 .reset = drm_atomic_helper_connector_reset, 277 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 278 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 279}; 280 281static const struct drm_edid *sii902x_edid_read(struct sii902x *sii902x, 282 struct drm_connector *connector) 283{ 284 const struct drm_edid *drm_edid; 285 286 mutex_lock(&sii902x->mutex); 287 288 drm_edid = drm_edid_read_ddc(connector, sii902x->i2cmux->adapter[0]); 289 290 mutex_unlock(&sii902x->mutex); 291 292 return drm_edid; 293} 294 295static int sii902x_get_modes(struct drm_connector *connector) 296{ 297 struct sii902x *sii902x = connector_to_sii902x(connector); 298 const struct drm_edid *drm_edid; 299 int num = 0; 300 301 drm_edid = sii902x_edid_read(sii902x, connector); 302 drm_edid_connector_update(connector, drm_edid); 303 if (drm_edid) { 304 num = drm_edid_connector_add_modes(connector); 305 drm_edid_free(drm_edid); 306 } 307 308 sii902x->sink_is_hdmi = connector->display_info.is_hdmi; 309 310 return num; 311} 312 313static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector, 314 struct drm_display_mode *mode) 315{ 316 /* TODO: check mode */ 317 318 return MODE_OK; 319} 320 321static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = { 322 .get_modes = sii902x_get_modes, 323 .mode_valid = sii902x_mode_valid, 324}; 325 326static void sii902x_bridge_disable(struct drm_bridge *bridge) 327{ 328 struct sii902x *sii902x = bridge_to_sii902x(bridge); 329 330 mutex_lock(&sii902x->mutex); 331 332 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 333 SII902X_SYS_CTRL_PWR_DWN, 334 SII902X_SYS_CTRL_PWR_DWN); 335 336 mutex_unlock(&sii902x->mutex); 337} 338 339static void sii902x_bridge_enable(struct drm_bridge *bridge) 340{ 341 struct sii902x *sii902x = bridge_to_sii902x(bridge); 342 343 mutex_lock(&sii902x->mutex); 344 345 regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL, 346 SII902X_AVI_POWER_STATE_MSK, 347 SII902X_AVI_POWER_STATE_D(0)); 348 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 349 SII902X_SYS_CTRL_PWR_DWN, 0); 350 351 mutex_unlock(&sii902x->mutex); 352} 353 354static void sii902x_bridge_mode_set(struct drm_bridge *bridge, 355 const struct drm_display_mode *mode, 356 const struct drm_display_mode *adj) 357{ 358 struct sii902x *sii902x = bridge_to_sii902x(bridge); 359 u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI; 360 struct regmap *regmap = sii902x->regmap; 361 u8 buf[HDMI_INFOFRAME_SIZE(AVI)]; 362 struct hdmi_avi_infoframe frame; 363 u16 pixel_clock_10kHz = adj->clock / 10; 364 int ret; 365 366 if (sii902x->sink_is_hdmi) 367 output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI; 368 369 buf[0] = pixel_clock_10kHz & 0xff; 370 buf[1] = pixel_clock_10kHz >> 8; 371 buf[2] = drm_mode_vrefresh(adj); 372 buf[3] = 0x00; 373 buf[4] = adj->hdisplay; 374 buf[5] = adj->hdisplay >> 8; 375 buf[6] = adj->vdisplay; 376 buf[7] = adj->vdisplay >> 8; 377 buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE | 378 SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT; 379 buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO | 380 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB; 381 382 mutex_lock(&sii902x->mutex); 383 384 ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 385 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode); 386 if (ret) 387 goto out; 388 389 ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10); 390 if (ret) 391 goto out; 392 393 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, 394 &sii902x->connector, adj); 395 if (ret < 0) { 396 DRM_ERROR("couldn't fill AVI infoframe\n"); 397 goto out; 398 } 399 400 ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf)); 401 if (ret < 0) { 402 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); 403 goto out; 404 } 405 406 /* Do not send the infoframe header, but keep the CRC field. */ 407 regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME, 408 buf + HDMI_INFOFRAME_HEADER_SIZE - 1, 409 HDMI_AVI_INFOFRAME_SIZE + 1); 410 411out: 412 mutex_unlock(&sii902x->mutex); 413} 414 415static int sii902x_bridge_attach(struct drm_bridge *bridge, 416 enum drm_bridge_attach_flags flags) 417{ 418 struct sii902x *sii902x = bridge_to_sii902x(bridge); 419 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 420 struct drm_device *drm = bridge->dev; 421 int ret; 422 423 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) 424 return drm_bridge_attach(bridge->encoder, sii902x->next_bridge, 425 bridge, flags); 426 427 drm_connector_helper_add(&sii902x->connector, 428 &sii902x_connector_helper_funcs); 429 430 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) { 431 dev_err(&sii902x->i2c->dev, 432 "sii902x driver is only compatible with DRM devices supporting atomic updates\n"); 433 return -ENOTSUPP; 434 } 435 436 ret = drm_connector_init(drm, &sii902x->connector, 437 &sii902x_connector_funcs, 438 DRM_MODE_CONNECTOR_HDMIA); 439 if (ret) 440 return ret; 441 442 if (sii902x->i2c->irq > 0) 443 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD; 444 else 445 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT; 446 447 ret = drm_display_info_set_bus_formats(&sii902x->connector.display_info, 448 &bus_format, 1); 449 if (ret) 450 return ret; 451 452 drm_connector_attach_encoder(&sii902x->connector, bridge->encoder); 453 454 return 0; 455} 456 457static enum drm_connector_status sii902x_bridge_detect(struct drm_bridge *bridge) 458{ 459 struct sii902x *sii902x = bridge_to_sii902x(bridge); 460 461 return sii902x_detect(sii902x); 462} 463 464static const struct drm_edid *sii902x_bridge_edid_read(struct drm_bridge *bridge, 465 struct drm_connector *connector) 466{ 467 struct sii902x *sii902x = bridge_to_sii902x(bridge); 468 469 return sii902x_edid_read(sii902x, connector); 470} 471 472static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 473 struct drm_bridge_state *bridge_state, 474 struct drm_crtc_state *crtc_state, 475 struct drm_connector_state *conn_state, 476 u32 output_fmt, 477 unsigned int *num_input_fmts) 478{ 479 u32 *input_fmts; 480 481 *num_input_fmts = 0; 482 483 input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL); 484 if (!input_fmts) 485 return NULL; 486 487 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 488 *num_input_fmts = 1; 489 490 return input_fmts; 491} 492 493static int sii902x_bridge_atomic_check(struct drm_bridge *bridge, 494 struct drm_bridge_state *bridge_state, 495 struct drm_crtc_state *crtc_state, 496 struct drm_connector_state *conn_state) 497{ 498 /* 499 * There might be flags negotiation supported in future but 500 * set the bus flags in atomic_check statically for now. 501 */ 502 bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags; 503 504 return 0; 505} 506 507static const struct drm_bridge_funcs sii902x_bridge_funcs = { 508 .attach = sii902x_bridge_attach, 509 .mode_set = sii902x_bridge_mode_set, 510 .disable = sii902x_bridge_disable, 511 .enable = sii902x_bridge_enable, 512 .detect = sii902x_bridge_detect, 513 .edid_read = sii902x_bridge_edid_read, 514 .atomic_reset = drm_atomic_helper_bridge_reset, 515 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 516 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 517 .atomic_get_input_bus_fmts = sii902x_bridge_atomic_get_input_bus_fmts, 518 .atomic_check = sii902x_bridge_atomic_check, 519}; 520 521static int sii902x_mute(struct sii902x *sii902x, bool mute) 522{ 523 struct device *dev = &sii902x->i2c->dev; 524 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE : 525 SII902X_TPI_AUDIO_MUTE_DISABLE; 526 527 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted"); 528 529 return regmap_update_bits(sii902x->regmap, 530 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 531 SII902X_TPI_AUDIO_MUTE_ENABLE, val); 532} 533 534static const int sii902x_mclk_div_table[] = { 535 128, 256, 384, 512, 768, 1024, 1152, 192 }; 536 537static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate, 538 unsigned int mclk) 539{ 540 int div = mclk / rate; 541 int distance = 100000; 542 u8 i, nearest = 0; 543 544 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) { 545 unsigned int d = abs(div - sii902x_mclk_div_table[i]); 546 547 if (d >= distance) 548 continue; 549 550 nearest = i; 551 distance = d; 552 if (d == 0) 553 break; 554 } 555 556 *i2s_config_reg |= nearest << 4; 557 558 return sii902x_mclk_div_table[nearest]; 559} 560 561static const struct sii902x_sample_freq { 562 u32 freq; 563 u8 val; 564} sii902x_sample_freq[] = { 565 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ }, 566 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ }, 567 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ }, 568 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ }, 569 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ }, 570 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ }, 571 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ }, 572}; 573 574static int sii902x_audio_hw_params(struct device *dev, void *data, 575 struct hdmi_codec_daifmt *daifmt, 576 struct hdmi_codec_params *params) 577{ 578 struct sii902x *sii902x = dev_get_drvdata(dev); 579 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST; 580 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S | 581 SII902X_TPI_AUDIO_MUTE_ENABLE | 582 SII902X_TPI_AUDIO_CODING_PCM); 583 u8 config_byte3_reg = 0; 584 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)]; 585 unsigned long mclk_rate; 586 int i, ret; 587 588 if (daifmt->bit_clk_provider || daifmt->frame_clk_provider) { 589 dev_dbg(dev, "%s: I2S clock provider mode not supported\n", 590 __func__); 591 return -EINVAL; 592 } 593 594 switch (daifmt->fmt) { 595 case HDMI_I2S: 596 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES | 597 SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 598 break; 599 case HDMI_RIGHT_J: 600 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT; 601 break; 602 case HDMI_LEFT_J: 603 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 604 break; 605 default: 606 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__, 607 daifmt->fmt); 608 return -EINVAL; 609 } 610 611 if (daifmt->bit_clk_inv) 612 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING; 613 else 614 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING; 615 616 if (daifmt->frame_clk_inv) 617 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW; 618 else 619 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH; 620 621 if (params->channels > 2) 622 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS; 623 else 624 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS; 625 626 switch (params->sample_width) { 627 case 16: 628 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16; 629 break; 630 case 20: 631 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20; 632 break; 633 case 24: 634 case 32: 635 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24; 636 break; 637 default: 638 dev_err(dev, "%s: Unsupported sample width %u\n", __func__, 639 params->sample_width); 640 return -EINVAL; 641 } 642 643 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) { 644 if (params->sample_rate == sii902x_sample_freq[i].freq) { 645 config_byte3_reg |= sii902x_sample_freq[i].val; 646 break; 647 } 648 } 649 650 ret = clk_prepare_enable(sii902x->audio.mclk); 651 if (ret) { 652 dev_err(dev, "Enabling mclk failed: %d\n", ret); 653 return ret; 654 } 655 656 if (sii902x->audio.mclk) { 657 mclk_rate = clk_get_rate(sii902x->audio.mclk); 658 ret = sii902x_select_mclk_div(&i2s_config_reg, 659 params->sample_rate, mclk_rate); 660 if (mclk_rate != ret * params->sample_rate) 661 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n", 662 mclk_rate, ret, params->sample_rate); 663 } 664 665 mutex_lock(&sii902x->mutex); 666 667 ret = regmap_write(sii902x->regmap, 668 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 669 config_byte2_reg); 670 if (ret < 0) 671 goto out; 672 673 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG, 674 i2s_config_reg); 675 if (ret) 676 goto out; 677 678 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) && 679 sii902x->audio.i2s_fifo_sequence[i]; i++) 680 regmap_write(sii902x->regmap, 681 SII902X_TPI_I2S_ENABLE_MAPPING_REG, 682 sii902x->audio.i2s_fifo_sequence[i]); 683 684 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG, 685 config_byte3_reg); 686 if (ret) 687 goto out; 688 689 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE, 690 params->iec.status, 691 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE, 692 sizeof(params->iec.status))); 693 if (ret) 694 goto out; 695 696 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf, 697 sizeof(infoframe_buf)); 698 if (ret < 0) { 699 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n", 700 __func__, ret); 701 goto out; 702 } 703 704 ret = regmap_bulk_write(sii902x->regmap, 705 SII902X_TPI_MISC_INFOFRAME_BASE, 706 infoframe_buf, 707 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE)); 708 if (ret) 709 goto out; 710 711 /* Decode Level 0 Packets */ 712 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02); 713 if (ret) 714 goto out; 715 716 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24); 717 if (ret) 718 goto out; 719 720 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02); 721 if (ret) 722 goto out; 723 724 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__); 725out: 726 mutex_unlock(&sii902x->mutex); 727 728 if (ret) { 729 clk_disable_unprepare(sii902x->audio.mclk); 730 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__, 731 ret); 732 } 733 734 return ret; 735} 736 737static void sii902x_audio_shutdown(struct device *dev, void *data) 738{ 739 struct sii902x *sii902x = dev_get_drvdata(dev); 740 741 mutex_lock(&sii902x->mutex); 742 743 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 744 SII902X_TPI_AUDIO_INTERFACE_DISABLE); 745 746 mutex_unlock(&sii902x->mutex); 747 748 clk_disable_unprepare(sii902x->audio.mclk); 749} 750 751static int sii902x_audio_mute(struct device *dev, void *data, 752 bool enable, int direction) 753{ 754 struct sii902x *sii902x = dev_get_drvdata(dev); 755 756 mutex_lock(&sii902x->mutex); 757 758 sii902x_mute(sii902x, enable); 759 760 mutex_unlock(&sii902x->mutex); 761 762 return 0; 763} 764 765static int sii902x_audio_get_eld(struct device *dev, void *data, 766 uint8_t *buf, size_t len) 767{ 768 struct sii902x *sii902x = dev_get_drvdata(dev); 769 770 mutex_lock(&sii902x->mutex); 771 772 memcpy(buf, sii902x->connector.eld, 773 min(sizeof(sii902x->connector.eld), len)); 774 775 mutex_unlock(&sii902x->mutex); 776 777 return 0; 778} 779 780static int sii902x_audio_get_dai_id(struct snd_soc_component *component, 781 struct device_node *endpoint) 782{ 783 struct of_endpoint of_ep; 784 int ret; 785 786 ret = of_graph_parse_endpoint(endpoint, &of_ep); 787 if (ret < 0) 788 return ret; 789 790 /* 791 * HDMI sound should be located at reg = <3> 792 * Return expected DAI index 0. 793 */ 794 if (of_ep.port == SII902X_AUDIO_PORT_INDEX) 795 return 0; 796 797 return -EINVAL; 798} 799 800static const struct hdmi_codec_ops sii902x_audio_codec_ops = { 801 .hw_params = sii902x_audio_hw_params, 802 .audio_shutdown = sii902x_audio_shutdown, 803 .mute_stream = sii902x_audio_mute, 804 .get_eld = sii902x_audio_get_eld, 805 .get_dai_id = sii902x_audio_get_dai_id, 806 .no_capture_mute = 1, 807}; 808 809static int sii902x_audio_codec_init(struct sii902x *sii902x, 810 struct device *dev) 811{ 812 static const u8 audio_fifo_id[] = { 813 SII902X_TPI_I2S_CONFIG_FIFO0, 814 SII902X_TPI_I2S_CONFIG_FIFO1, 815 SII902X_TPI_I2S_CONFIG_FIFO2, 816 SII902X_TPI_I2S_CONFIG_FIFO3, 817 }; 818 static const u8 i2s_lane_id[] = { 819 SII902X_TPI_I2S_SELECT_SD0, 820 SII902X_TPI_I2S_SELECT_SD1, 821 SII902X_TPI_I2S_SELECT_SD2, 822 SII902X_TPI_I2S_SELECT_SD3, 823 }; 824 struct hdmi_codec_pdata codec_data = { 825 .ops = &sii902x_audio_codec_ops, 826 .i2s = 1, /* Only i2s support for now. */ 827 .spdif = 0, 828 .max_i2s_channels = 0, 829 }; 830 u8 lanes[4]; 831 int num_lanes, i; 832 833 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) { 834 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n", 835 __func__); 836 return 0; 837 } 838 839 num_lanes = of_property_read_variable_u8_array(dev->of_node, 840 "sil,i2s-data-lanes", 841 lanes, 1, 842 ARRAY_SIZE(lanes)); 843 844 if (num_lanes == -EINVAL) { 845 dev_dbg(dev, 846 "%s: No \"sil,i2s-data-lanes\", use default <0>\n", 847 __func__); 848 num_lanes = 1; 849 lanes[0] = 0; 850 } else if (num_lanes < 0) { 851 dev_err(dev, 852 "%s: Error gettin \"sil,i2s-data-lanes\": %d\n", 853 __func__, num_lanes); 854 return num_lanes; 855 } 856 codec_data.max_i2s_channels = 2 * num_lanes; 857 858 for (i = 0; i < num_lanes; i++) 859 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] | 860 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE; 861 862 sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk"); 863 if (IS_ERR(sii902x->audio.mclk)) { 864 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n", 865 __func__, PTR_ERR(sii902x->audio.mclk)); 866 return PTR_ERR(sii902x->audio.mclk); 867 } 868 869 sii902x->audio.pdev = platform_device_register_data( 870 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 871 &codec_data, sizeof(codec_data)); 872 873 return PTR_ERR_OR_ZERO(sii902x->audio.pdev); 874} 875 876static const struct regmap_range sii902x_volatile_ranges[] = { 877 { .range_min = 0, .range_max = 0xff }, 878}; 879 880static const struct regmap_access_table sii902x_volatile_table = { 881 .yes_ranges = sii902x_volatile_ranges, 882 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges), 883}; 884 885static const struct regmap_config sii902x_regmap_config = { 886 .reg_bits = 8, 887 .val_bits = 8, 888 .disable_locking = true, /* struct sii902x mutex should be enough */ 889 .max_register = SII902X_TPI_MISC_INFOFRAME_END, 890 .volatile_table = &sii902x_volatile_table, 891 .cache_type = REGCACHE_NONE, 892}; 893 894static irqreturn_t sii902x_interrupt(int irq, void *data) 895{ 896 struct sii902x *sii902x = data; 897 unsigned int status = 0; 898 899 mutex_lock(&sii902x->mutex); 900 901 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 902 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 903 904 mutex_unlock(&sii902x->mutex); 905 906 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) { 907 drm_helper_hpd_irq_event(sii902x->bridge.dev); 908 drm_bridge_hpd_notify(&sii902x->bridge, (status & SII902X_PLUGGED_STATUS) 909 ? connector_status_connected 910 : connector_status_disconnected); 911 } 912 913 return IRQ_HANDLED; 914} 915 916/* 917 * The purpose of sii902x_i2c_bypass_select is to enable the pass through 918 * mode of the HDMI transmitter. Do not use regmap from within this function, 919 * only use sii902x_*_unlocked functions to read/modify/write registers. 920 * We are holding the parent adapter lock here, keep this in mind before 921 * adding more i2c transactions. 922 * 923 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 924 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 925 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 926 * we leave the remaining bits as we have found them. 927 */ 928static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id) 929{ 930 struct sii902x *sii902x = i2c_mux_priv(mux); 931 struct device *dev = &sii902x->i2c->dev; 932 unsigned long timeout; 933 u8 status; 934 int ret; 935 936 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 937 SII902X_SYS_CTRL_DDC_BUS_REQ, 938 SII902X_SYS_CTRL_DDC_BUS_REQ); 939 if (ret) 940 return ret; 941 942 timeout = jiffies + 943 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 944 do { 945 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 946 &status); 947 if (ret) 948 return ret; 949 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) && 950 time_before(jiffies, timeout)); 951 952 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 953 dev_err(dev, "Failed to acquire the i2c bus\n"); 954 return -ETIMEDOUT; 955 } 956 957 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 958 status); 959} 960 961/* 962 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through 963 * mode of the HDMI transmitter. Do not use regmap from within this function, 964 * only use sii902x_*_unlocked functions to read/modify/write registers. 965 * We are holding the parent adapter lock here, keep this in mind before 966 * adding more i2c transactions. 967 * 968 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 969 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 970 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 971 * we leave the remaining bits as we have found them. 972 */ 973static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id) 974{ 975 struct sii902x *sii902x = i2c_mux_priv(mux); 976 struct device *dev = &sii902x->i2c->dev; 977 unsigned long timeout; 978 unsigned int retries; 979 u8 status; 980 int ret; 981 982 /* 983 * When the HDMI transmitter is in pass through mode, we need an 984 * (undocumented) additional delay between STOP and START conditions 985 * to guarantee the bus won't get stuck. 986 */ 987 udelay(30); 988 989 /* 990 * Sometimes the I2C bus can stall after failure to use the 991 * EDID channel. Retry a few times to see if things clear 992 * up, else continue anyway. 993 */ 994 retries = 5; 995 do { 996 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 997 &status); 998 retries--; 999 } while (ret && retries); 1000 if (ret) { 1001 dev_err(dev, "failed to read status (%d)\n", ret); 1002 return ret; 1003 } 1004 1005 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1006 SII902X_SYS_CTRL_DDC_BUS_REQ | 1007 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0); 1008 if (ret) 1009 return ret; 1010 1011 timeout = jiffies + 1012 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 1013 do { 1014 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1015 &status); 1016 if (ret) 1017 return ret; 1018 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 1019 SII902X_SYS_CTRL_DDC_BUS_GRTD) && 1020 time_before(jiffies, timeout)); 1021 1022 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 1023 SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 1024 dev_err(dev, "failed to release the i2c bus\n"); 1025 return -ETIMEDOUT; 1026 } 1027 1028 return 0; 1029} 1030 1031static const struct drm_bridge_timings default_sii902x_timings = { 1032 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 1033 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE 1034 | DRM_BUS_FLAG_DE_HIGH, 1035}; 1036 1037static int sii902x_init(struct sii902x *sii902x) 1038{ 1039 struct device *dev = &sii902x->i2c->dev; 1040 unsigned int status = 0; 1041 u8 chipid[4]; 1042 int ret; 1043 1044 sii902x_reset(sii902x); 1045 1046 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0); 1047 if (ret) 1048 return ret; 1049 1050 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0), 1051 &chipid, 4); 1052 if (ret) { 1053 dev_err(dev, "regmap_read failed %d\n", ret); 1054 return ret; 1055 } 1056 1057 if (chipid[0] != 0xb0) { 1058 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n", 1059 chipid[0]); 1060 return -EINVAL; 1061 } 1062 1063 /* Clear all pending interrupts */ 1064 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 1065 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 1066 1067 if (sii902x->i2c->irq > 0) { 1068 regmap_write(sii902x->regmap, SII902X_INT_ENABLE, 1069 SII902X_HOTPLUG_EVENT); 1070 1071 ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL, 1072 sii902x_interrupt, 1073 IRQF_ONESHOT, dev_name(dev), 1074 sii902x); 1075 if (ret) 1076 return ret; 1077 } 1078 1079 ret = sii902x_audio_codec_init(sii902x, dev); 1080 if (ret) 1081 return ret; 1082 1083 i2c_set_clientdata(sii902x->i2c, sii902x); 1084 1085 sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev, 1086 1, 0, I2C_MUX_GATE, 1087 sii902x_i2c_bypass_select, 1088 sii902x_i2c_bypass_deselect); 1089 if (!sii902x->i2cmux) { 1090 ret = -ENOMEM; 1091 goto err_unreg_audio; 1092 } 1093 1094 sii902x->i2cmux->priv = sii902x; 1095 ret = i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0); 1096 if (ret) 1097 goto err_unreg_audio; 1098 1099 sii902x->bridge.funcs = &sii902x_bridge_funcs; 1100 sii902x->bridge.of_node = dev->of_node; 1101 sii902x->bridge.timings = &default_sii902x_timings; 1102 sii902x->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 1103 1104 if (sii902x->i2c->irq > 0) 1105 sii902x->bridge.ops |= DRM_BRIDGE_OP_HPD; 1106 1107 drm_bridge_add(&sii902x->bridge); 1108 1109 return 0; 1110 1111err_unreg_audio: 1112 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev)) 1113 platform_device_unregister(sii902x->audio.pdev); 1114 1115 return ret; 1116} 1117 1118static int sii902x_probe(struct i2c_client *client) 1119{ 1120 struct device *dev = &client->dev; 1121 struct device_node *endpoint; 1122 struct sii902x *sii902x; 1123 static const char * const supplies[] = {"iovcc", "cvcc12"}; 1124 int ret; 1125 1126 ret = i2c_check_functionality(client->adapter, 1127 I2C_FUNC_SMBUS_BYTE_DATA); 1128 if (!ret) { 1129 dev_err(dev, "I2C adapter not suitable\n"); 1130 return -EIO; 1131 } 1132 1133 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL); 1134 if (!sii902x) 1135 return -ENOMEM; 1136 1137 sii902x->i2c = client; 1138 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config); 1139 if (IS_ERR(sii902x->regmap)) 1140 return PTR_ERR(sii902x->regmap); 1141 1142 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset", 1143 GPIOD_OUT_LOW); 1144 if (IS_ERR(sii902x->reset_gpio)) { 1145 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n", 1146 PTR_ERR(sii902x->reset_gpio)); 1147 return PTR_ERR(sii902x->reset_gpio); 1148 } 1149 1150 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1); 1151 if (endpoint) { 1152 struct device_node *remote = of_graph_get_remote_port_parent(endpoint); 1153 1154 of_node_put(endpoint); 1155 if (!remote) { 1156 dev_err(dev, "Endpoint in port@1 unconnected\n"); 1157 return -ENODEV; 1158 } 1159 1160 if (!of_device_is_available(remote)) { 1161 dev_err(dev, "port@1 remote device is disabled\n"); 1162 of_node_put(remote); 1163 return -ENODEV; 1164 } 1165 1166 sii902x->next_bridge = of_drm_find_bridge(remote); 1167 of_node_put(remote); 1168 if (!sii902x->next_bridge) 1169 return dev_err_probe(dev, -EPROBE_DEFER, 1170 "Failed to find remote bridge\n"); 1171 } 1172 1173 mutex_init(&sii902x->mutex); 1174 1175 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(supplies), supplies); 1176 if (ret < 0) 1177 return dev_err_probe(dev, ret, "Failed to enable supplies"); 1178 1179 return sii902x_init(sii902x); 1180} 1181 1182static void sii902x_remove(struct i2c_client *client) 1183{ 1184 struct sii902x *sii902x = i2c_get_clientdata(client); 1185 1186 drm_bridge_remove(&sii902x->bridge); 1187 i2c_mux_del_adapters(sii902x->i2cmux); 1188 1189 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev)) 1190 platform_device_unregister(sii902x->audio.pdev); 1191} 1192 1193static const struct of_device_id sii902x_dt_ids[] = { 1194 { .compatible = "sil,sii9022", }, 1195 { } 1196}; 1197MODULE_DEVICE_TABLE(of, sii902x_dt_ids); 1198 1199static const struct i2c_device_id sii902x_i2c_ids[] = { 1200 { "sii9022", 0 }, 1201 { }, 1202}; 1203MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids); 1204 1205static struct i2c_driver sii902x_driver = { 1206 .probe = sii902x_probe, 1207 .remove = sii902x_remove, 1208 .driver = { 1209 .name = "sii902x", 1210 .of_match_table = sii902x_dt_ids, 1211 }, 1212 .id_table = sii902x_i2c_ids, 1213}; 1214module_i2c_driver(sii902x_driver); 1215 1216MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); 1217MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges"); 1218MODULE_LICENSE("GPL"); 1219