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