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_atomic_state *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_atomic_state *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 struct drm_encoder *encoder, 420 enum drm_bridge_attach_flags flags) 421 { 422 struct sii902x *sii902x = bridge_to_sii902x(bridge); 423 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 424 struct drm_device *drm = bridge->dev; 425 int ret; 426 427 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) 428 return drm_bridge_attach(encoder, sii902x->next_bridge, 429 bridge, flags); 430 431 drm_connector_helper_add(&sii902x->connector, 432 &sii902x_connector_helper_funcs); 433 434 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) { 435 dev_err(&sii902x->i2c->dev, 436 "sii902x driver is only compatible with DRM devices supporting atomic updates\n"); 437 return -ENOTSUPP; 438 } 439 440 ret = drm_connector_init(drm, &sii902x->connector, 441 &sii902x_connector_funcs, 442 DRM_MODE_CONNECTOR_HDMIA); 443 if (ret) 444 return ret; 445 446 if (sii902x->i2c->irq > 0) 447 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD; 448 else 449 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT; 450 451 ret = drm_display_info_set_bus_formats(&sii902x->connector.display_info, 452 &bus_format, 1); 453 if (ret) 454 return ret; 455 456 drm_connector_attach_encoder(&sii902x->connector, encoder); 457 458 return 0; 459 } 460 461 static enum drm_connector_status sii902x_bridge_detect(struct drm_bridge *bridge) 462 { 463 struct sii902x *sii902x = bridge_to_sii902x(bridge); 464 465 return sii902x_detect(sii902x); 466 } 467 468 static const struct drm_edid *sii902x_bridge_edid_read(struct drm_bridge *bridge, 469 struct drm_connector *connector) 470 { 471 struct sii902x *sii902x = bridge_to_sii902x(bridge); 472 473 return sii902x_edid_read(sii902x, connector); 474 } 475 476 static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 477 struct drm_bridge_state *bridge_state, 478 struct drm_crtc_state *crtc_state, 479 struct drm_connector_state *conn_state, 480 u32 output_fmt, 481 unsigned int *num_input_fmts) 482 { 483 484 struct sii902x *sii902x = bridge_to_sii902x(bridge); 485 u32 *input_fmts; 486 487 *num_input_fmts = 0; 488 489 input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL); 490 if (!input_fmts) 491 return NULL; 492 493 switch (sii902x->bus_width) { 494 case 16: 495 input_fmts[0] = MEDIA_BUS_FMT_RGB565_1X16; 496 break; 497 case 18: 498 input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X18; 499 break; 500 case 24: 501 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 502 break; 503 default: 504 return NULL; 505 } 506 507 *num_input_fmts = 1; 508 509 return input_fmts; 510 } 511 512 static int sii902x_bridge_atomic_check(struct drm_bridge *bridge, 513 struct drm_bridge_state *bridge_state, 514 struct drm_crtc_state *crtc_state, 515 struct drm_connector_state *conn_state) 516 { 517 if (crtc_state->mode.clock < SII902X_MIN_PIXEL_CLOCK_KHZ || 518 crtc_state->mode.clock > SII902X_MAX_PIXEL_CLOCK_KHZ) 519 return -EINVAL; 520 521 /* 522 * There might be flags negotiation supported in future but 523 * set the bus flags in atomic_check statically for now. 524 */ 525 bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags; 526 527 return 0; 528 } 529 530 static enum drm_mode_status 531 sii902x_bridge_mode_valid(struct drm_bridge *bridge, 532 const struct drm_display_info *info, 533 const struct drm_display_mode *mode) 534 { 535 if (mode->clock < SII902X_MIN_PIXEL_CLOCK_KHZ) 536 return MODE_CLOCK_LOW; 537 538 if (mode->clock > SII902X_MAX_PIXEL_CLOCK_KHZ) 539 return MODE_CLOCK_HIGH; 540 541 return MODE_OK; 542 } 543 544 static const struct drm_bridge_funcs sii902x_bridge_funcs = { 545 .attach = sii902x_bridge_attach, 546 .mode_set = sii902x_bridge_mode_set, 547 .atomic_disable = sii902x_bridge_atomic_disable, 548 .atomic_enable = sii902x_bridge_atomic_enable, 549 .detect = sii902x_bridge_detect, 550 .edid_read = sii902x_bridge_edid_read, 551 .atomic_reset = drm_atomic_helper_bridge_reset, 552 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 553 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 554 .atomic_get_input_bus_fmts = sii902x_bridge_atomic_get_input_bus_fmts, 555 .atomic_check = sii902x_bridge_atomic_check, 556 .mode_valid = sii902x_bridge_mode_valid, 557 }; 558 559 static int sii902x_mute(struct sii902x *sii902x, bool mute) 560 { 561 struct device *dev = &sii902x->i2c->dev; 562 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE : 563 SII902X_TPI_AUDIO_MUTE_DISABLE; 564 565 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted"); 566 567 return regmap_update_bits(sii902x->regmap, 568 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 569 SII902X_TPI_AUDIO_MUTE_ENABLE, val); 570 } 571 572 static const int sii902x_mclk_div_table[] = { 573 128, 256, 384, 512, 768, 1024, 1152, 192 }; 574 575 static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate, 576 unsigned int mclk) 577 { 578 int div = mclk / rate; 579 int distance = 100000; 580 u8 i, nearest = 0; 581 582 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) { 583 unsigned int d = abs(div - sii902x_mclk_div_table[i]); 584 585 if (d >= distance) 586 continue; 587 588 nearest = i; 589 distance = d; 590 if (d == 0) 591 break; 592 } 593 594 *i2s_config_reg |= nearest << 4; 595 596 return sii902x_mclk_div_table[nearest]; 597 } 598 599 static const struct sii902x_sample_freq { 600 u32 freq; 601 u8 val; 602 } sii902x_sample_freq[] = { 603 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ }, 604 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ }, 605 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ }, 606 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ }, 607 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ }, 608 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ }, 609 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ }, 610 }; 611 612 static int sii902x_audio_hw_params(struct device *dev, void *data, 613 struct hdmi_codec_daifmt *daifmt, 614 struct hdmi_codec_params *params) 615 { 616 struct sii902x *sii902x = dev_get_drvdata(dev); 617 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST; 618 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S | 619 SII902X_TPI_AUDIO_MUTE_ENABLE | 620 SII902X_TPI_AUDIO_CODING_PCM); 621 u8 config_byte3_reg = 0; 622 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)]; 623 unsigned long mclk_rate; 624 int i, ret; 625 626 if (daifmt->bit_clk_provider || daifmt->frame_clk_provider) { 627 dev_dbg(dev, "%s: I2S clock provider mode not supported\n", 628 __func__); 629 return -EINVAL; 630 } 631 632 switch (daifmt->fmt) { 633 case HDMI_I2S: 634 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES | 635 SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 636 break; 637 case HDMI_RIGHT_J: 638 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT; 639 break; 640 case HDMI_LEFT_J: 641 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 642 break; 643 default: 644 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__, 645 daifmt->fmt); 646 return -EINVAL; 647 } 648 649 if (daifmt->bit_clk_inv) 650 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING; 651 else 652 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING; 653 654 if (daifmt->frame_clk_inv) 655 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW; 656 else 657 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH; 658 659 if (params->channels > 2) 660 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS; 661 else 662 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS; 663 664 switch (params->sample_width) { 665 case 16: 666 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16; 667 break; 668 case 20: 669 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20; 670 break; 671 case 24: 672 case 32: 673 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24; 674 break; 675 default: 676 dev_err(dev, "%s: Unsupported sample width %u\n", __func__, 677 params->sample_width); 678 return -EINVAL; 679 } 680 681 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) { 682 if (params->sample_rate == sii902x_sample_freq[i].freq) { 683 config_byte3_reg |= sii902x_sample_freq[i].val; 684 break; 685 } 686 } 687 688 ret = clk_prepare_enable(sii902x->audio.mclk); 689 if (ret) { 690 dev_err(dev, "Enabling mclk failed: %d\n", ret); 691 return ret; 692 } 693 694 if (sii902x->audio.mclk) { 695 mclk_rate = clk_get_rate(sii902x->audio.mclk); 696 ret = sii902x_select_mclk_div(&i2s_config_reg, 697 params->sample_rate, mclk_rate); 698 if (mclk_rate != ret * params->sample_rate) 699 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n", 700 mclk_rate, ret, params->sample_rate); 701 } 702 703 mutex_lock(&sii902x->mutex); 704 705 ret = regmap_write(sii902x->regmap, 706 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 707 config_byte2_reg); 708 if (ret < 0) 709 goto out; 710 711 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG, 712 i2s_config_reg); 713 if (ret) 714 goto out; 715 716 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) && 717 sii902x->audio.i2s_fifo_sequence[i]; i++) 718 regmap_write(sii902x->regmap, 719 SII902X_TPI_I2S_ENABLE_MAPPING_REG, 720 sii902x->audio.i2s_fifo_sequence[i]); 721 722 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG, 723 config_byte3_reg); 724 if (ret) 725 goto out; 726 727 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE, 728 params->iec.status, 729 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE, 730 sizeof(params->iec.status))); 731 if (ret) 732 goto out; 733 734 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf, 735 sizeof(infoframe_buf)); 736 if (ret < 0) { 737 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n", 738 __func__, ret); 739 goto out; 740 } 741 742 ret = regmap_bulk_write(sii902x->regmap, 743 SII902X_TPI_MISC_INFOFRAME_BASE, 744 infoframe_buf, 745 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE)); 746 if (ret) 747 goto out; 748 749 /* Decode Level 0 Packets */ 750 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02); 751 if (ret) 752 goto out; 753 754 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24); 755 if (ret) 756 goto out; 757 758 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02); 759 if (ret) 760 goto out; 761 762 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__); 763 out: 764 mutex_unlock(&sii902x->mutex); 765 766 if (ret) { 767 clk_disable_unprepare(sii902x->audio.mclk); 768 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__, 769 ret); 770 } 771 772 return ret; 773 } 774 775 static void sii902x_audio_shutdown(struct device *dev, void *data) 776 { 777 struct sii902x *sii902x = dev_get_drvdata(dev); 778 779 mutex_lock(&sii902x->mutex); 780 781 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 782 SII902X_TPI_AUDIO_INTERFACE_DISABLE); 783 784 mutex_unlock(&sii902x->mutex); 785 786 clk_disable_unprepare(sii902x->audio.mclk); 787 } 788 789 static int sii902x_audio_mute(struct device *dev, void *data, 790 bool enable, int direction) 791 { 792 struct sii902x *sii902x = dev_get_drvdata(dev); 793 794 mutex_lock(&sii902x->mutex); 795 796 sii902x_mute(sii902x, enable); 797 798 mutex_unlock(&sii902x->mutex); 799 800 return 0; 801 } 802 803 static int sii902x_audio_get_eld(struct device *dev, void *data, 804 uint8_t *buf, size_t len) 805 { 806 struct sii902x *sii902x = dev_get_drvdata(dev); 807 808 mutex_lock(&sii902x->mutex); 809 810 memcpy(buf, sii902x->connector.eld, 811 min(sizeof(sii902x->connector.eld), len)); 812 813 mutex_unlock(&sii902x->mutex); 814 815 return 0; 816 } 817 818 static int sii902x_audio_get_dai_id(struct snd_soc_component *component, 819 struct device_node *endpoint, 820 void *data) 821 { 822 struct of_endpoint of_ep; 823 int ret; 824 825 ret = of_graph_parse_endpoint(endpoint, &of_ep); 826 if (ret < 0) 827 return ret; 828 829 /* 830 * HDMI sound should be located at reg = <3> 831 * Return expected DAI index 0. 832 */ 833 if (of_ep.port == SII902X_AUDIO_PORT_INDEX) 834 return 0; 835 836 return -EINVAL; 837 } 838 839 static const struct hdmi_codec_ops sii902x_audio_codec_ops = { 840 .hw_params = sii902x_audio_hw_params, 841 .audio_shutdown = sii902x_audio_shutdown, 842 .mute_stream = sii902x_audio_mute, 843 .get_eld = sii902x_audio_get_eld, 844 .get_dai_id = sii902x_audio_get_dai_id, 845 }; 846 847 static int sii902x_audio_codec_init(struct sii902x *sii902x, 848 struct device *dev) 849 { 850 static const u8 audio_fifo_id[] = { 851 SII902X_TPI_I2S_CONFIG_FIFO0, 852 SII902X_TPI_I2S_CONFIG_FIFO1, 853 SII902X_TPI_I2S_CONFIG_FIFO2, 854 SII902X_TPI_I2S_CONFIG_FIFO3, 855 }; 856 static const u8 i2s_lane_id[] = { 857 SII902X_TPI_I2S_SELECT_SD0, 858 SII902X_TPI_I2S_SELECT_SD1, 859 SII902X_TPI_I2S_SELECT_SD2, 860 SII902X_TPI_I2S_SELECT_SD3, 861 }; 862 struct hdmi_codec_pdata codec_data = { 863 .ops = &sii902x_audio_codec_ops, 864 .i2s = 1, /* Only i2s support for now. */ 865 .spdif = 0, 866 .max_i2s_channels = 0, 867 .no_capture_mute = 1, 868 }; 869 u8 lanes[4]; 870 int num_lanes, i; 871 872 if (!of_property_present(dev->of_node, "#sound-dai-cells")) { 873 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n", 874 __func__); 875 return 0; 876 } 877 878 num_lanes = of_property_read_variable_u8_array(dev->of_node, 879 "sil,i2s-data-lanes", 880 lanes, 1, 881 ARRAY_SIZE(lanes)); 882 883 if (num_lanes == -EINVAL) { 884 dev_dbg(dev, 885 "%s: No \"sil,i2s-data-lanes\", use default <0>\n", 886 __func__); 887 num_lanes = 1; 888 lanes[0] = 0; 889 } else if (num_lanes < 0) { 890 dev_err(dev, 891 "%s: Error getting \"sil,i2s-data-lanes\": %d\n", 892 __func__, num_lanes); 893 return num_lanes; 894 } 895 codec_data.max_i2s_channels = 2 * num_lanes; 896 897 for (i = 0; i < num_lanes; i++) 898 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] | 899 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE; 900 901 sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk"); 902 if (IS_ERR(sii902x->audio.mclk)) { 903 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n", 904 __func__, PTR_ERR(sii902x->audio.mclk)); 905 return PTR_ERR(sii902x->audio.mclk); 906 } 907 908 sii902x->audio.pdev = platform_device_register_data( 909 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 910 &codec_data, sizeof(codec_data)); 911 912 return PTR_ERR_OR_ZERO(sii902x->audio.pdev); 913 } 914 915 static const struct regmap_range sii902x_volatile_ranges[] = { 916 { .range_min = 0, .range_max = 0xff }, 917 }; 918 919 static const struct regmap_access_table sii902x_volatile_table = { 920 .yes_ranges = sii902x_volatile_ranges, 921 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges), 922 }; 923 924 static const struct regmap_config sii902x_regmap_config = { 925 .reg_bits = 8, 926 .val_bits = 8, 927 .disable_locking = true, /* struct sii902x mutex should be enough */ 928 .max_register = SII902X_TPI_MISC_INFOFRAME_END, 929 .volatile_table = &sii902x_volatile_table, 930 .cache_type = REGCACHE_NONE, 931 }; 932 933 static irqreturn_t sii902x_interrupt(int irq, void *data) 934 { 935 struct sii902x *sii902x = data; 936 unsigned int status = 0; 937 938 mutex_lock(&sii902x->mutex); 939 940 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 941 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 942 943 mutex_unlock(&sii902x->mutex); 944 945 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) { 946 drm_helper_hpd_irq_event(sii902x->bridge.dev); 947 drm_bridge_hpd_notify(&sii902x->bridge, (status & SII902X_PLUGGED_STATUS) 948 ? connector_status_connected 949 : connector_status_disconnected); 950 } 951 952 return IRQ_HANDLED; 953 } 954 955 /* 956 * The purpose of sii902x_i2c_bypass_select is to enable the pass through 957 * mode of the HDMI transmitter. Do not use regmap from within this function, 958 * only use sii902x_*_unlocked functions to read/modify/write registers. 959 * We are holding the parent adapter lock here, keep this in mind before 960 * adding more i2c transactions. 961 * 962 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 963 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 964 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 965 * we leave the remaining bits as we have found them. 966 */ 967 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id) 968 { 969 struct sii902x *sii902x = i2c_mux_priv(mux); 970 struct device *dev = &sii902x->i2c->dev; 971 unsigned long timeout; 972 u8 status; 973 int ret; 974 975 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 976 SII902X_SYS_CTRL_DDC_BUS_REQ, 977 SII902X_SYS_CTRL_DDC_BUS_REQ); 978 if (ret) 979 return ret; 980 981 timeout = jiffies + 982 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 983 do { 984 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 985 &status); 986 if (ret) 987 return ret; 988 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) && 989 time_before(jiffies, timeout)); 990 991 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 992 dev_err(dev, "Failed to acquire the i2c bus\n"); 993 return -ETIMEDOUT; 994 } 995 996 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 997 status); 998 } 999 1000 /* 1001 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through 1002 * mode of the HDMI transmitter. Do not use regmap from within this function, 1003 * only use sii902x_*_unlocked functions to read/modify/write registers. 1004 * We are holding the parent adapter lock here, keep this in mind before 1005 * adding more i2c transactions. 1006 * 1007 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 1008 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 1009 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 1010 * we leave the remaining bits as we have found them. 1011 */ 1012 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id) 1013 { 1014 struct sii902x *sii902x = i2c_mux_priv(mux); 1015 struct device *dev = &sii902x->i2c->dev; 1016 unsigned long timeout; 1017 unsigned int retries; 1018 u8 status; 1019 int ret; 1020 1021 /* 1022 * When the HDMI transmitter is in pass through mode, we need an 1023 * (undocumented) additional delay between STOP and START conditions 1024 * to guarantee the bus won't get stuck. 1025 */ 1026 udelay(30); 1027 1028 /* 1029 * Sometimes the I2C bus can stall after failure to use the 1030 * EDID channel. Retry a few times to see if things clear 1031 * up, else continue anyway. 1032 */ 1033 retries = 5; 1034 do { 1035 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1036 &status); 1037 retries--; 1038 } while (ret && retries); 1039 if (ret) { 1040 dev_err(dev, "failed to read status (%d)\n", ret); 1041 return ret; 1042 } 1043 1044 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1045 SII902X_SYS_CTRL_DDC_BUS_REQ | 1046 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0); 1047 if (ret) 1048 return ret; 1049 1050 timeout = jiffies + 1051 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 1052 do { 1053 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 1054 &status); 1055 if (ret) 1056 return ret; 1057 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 1058 SII902X_SYS_CTRL_DDC_BUS_GRTD) && 1059 time_before(jiffies, timeout)); 1060 1061 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 1062 SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 1063 dev_err(dev, "failed to release the i2c bus\n"); 1064 return -ETIMEDOUT; 1065 } 1066 1067 return 0; 1068 } 1069 1070 static const struct drm_bridge_timings default_sii902x_timings = { 1071 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 1072 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE 1073 | DRM_BUS_FLAG_DE_HIGH, 1074 }; 1075 1076 static int sii902x_init(struct sii902x *sii902x) 1077 { 1078 struct device *dev = &sii902x->i2c->dev; 1079 unsigned int status = 0; 1080 u8 chipid[4]; 1081 int ret; 1082 1083 sii902x_reset(sii902x); 1084 1085 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0); 1086 if (ret) 1087 return ret; 1088 1089 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0), 1090 &chipid, 4); 1091 if (ret) { 1092 dev_err(dev, "regmap_read failed %d\n", ret); 1093 return ret; 1094 } 1095 1096 if (chipid[0] != 0xb0) { 1097 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n", 1098 chipid[0]); 1099 return -EINVAL; 1100 } 1101 1102 /* Clear all pending interrupts */ 1103 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 1104 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 1105 1106 if (sii902x->i2c->irq > 0) { 1107 regmap_write(sii902x->regmap, SII902X_INT_ENABLE, 1108 SII902X_HOTPLUG_EVENT); 1109 1110 ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL, 1111 sii902x_interrupt, 1112 IRQF_ONESHOT, dev_name(dev), 1113 sii902x); 1114 if (ret) 1115 return ret; 1116 } 1117 1118 ret = sii902x_audio_codec_init(sii902x, dev); 1119 if (ret) 1120 return ret; 1121 1122 i2c_set_clientdata(sii902x->i2c, sii902x); 1123 1124 sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev, 1125 1, 0, I2C_MUX_GATE, 1126 sii902x_i2c_bypass_select, 1127 sii902x_i2c_bypass_deselect); 1128 if (!sii902x->i2cmux) { 1129 ret = -ENOMEM; 1130 goto err_unreg_audio; 1131 } 1132 1133 sii902x->i2cmux->priv = sii902x; 1134 ret = i2c_mux_add_adapter(sii902x->i2cmux, 0, 0); 1135 if (ret) 1136 goto err_unreg_audio; 1137 1138 sii902x->bridge.funcs = &sii902x_bridge_funcs; 1139 sii902x->bridge.of_node = dev->of_node; 1140 sii902x->bridge.timings = &default_sii902x_timings; 1141 sii902x->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 1142 sii902x->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1143 1144 if (sii902x->i2c->irq > 0) 1145 sii902x->bridge.ops |= DRM_BRIDGE_OP_HPD; 1146 1147 drm_bridge_add(&sii902x->bridge); 1148 1149 return 0; 1150 1151 err_unreg_audio: 1152 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev)) 1153 platform_device_unregister(sii902x->audio.pdev); 1154 1155 return ret; 1156 } 1157 1158 static int sii902x_probe(struct i2c_client *client) 1159 { 1160 struct device *dev = &client->dev; 1161 struct device_node *endpoint; 1162 struct sii902x *sii902x; 1163 static const char * const supplies[] = {"iovcc", "cvcc12"}; 1164 int ret; 1165 1166 ret = i2c_check_functionality(client->adapter, 1167 I2C_FUNC_SMBUS_BYTE_DATA); 1168 if (!ret) { 1169 dev_err(dev, "I2C adapter not suitable\n"); 1170 return -EIO; 1171 } 1172 1173 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL); 1174 if (!sii902x) 1175 return -ENOMEM; 1176 1177 sii902x->i2c = client; 1178 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config); 1179 if (IS_ERR(sii902x->regmap)) 1180 return PTR_ERR(sii902x->regmap); 1181 1182 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset", 1183 GPIOD_OUT_LOW); 1184 if (IS_ERR(sii902x->reset_gpio)) { 1185 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n", 1186 PTR_ERR(sii902x->reset_gpio)); 1187 return PTR_ERR(sii902x->reset_gpio); 1188 } 1189 1190 sii902x->bus_width = 24; 1191 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); 1192 if (endpoint) 1193 of_property_read_u32(endpoint, "bus-width", &sii902x->bus_width); 1194 1195 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1); 1196 if (endpoint) { 1197 struct device_node *remote = of_graph_get_remote_port_parent(endpoint); 1198 1199 of_node_put(endpoint); 1200 if (!remote) { 1201 dev_err(dev, "Endpoint in port@1 unconnected\n"); 1202 return -ENODEV; 1203 } 1204 1205 if (!of_device_is_available(remote)) { 1206 dev_err(dev, "port@1 remote device is disabled\n"); 1207 of_node_put(remote); 1208 return -ENODEV; 1209 } 1210 1211 sii902x->next_bridge = of_drm_find_bridge(remote); 1212 of_node_put(remote); 1213 if (!sii902x->next_bridge) 1214 return dev_err_probe(dev, -EPROBE_DEFER, 1215 "Failed to find remote bridge\n"); 1216 } 1217 1218 mutex_init(&sii902x->mutex); 1219 1220 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(supplies), supplies); 1221 if (ret < 0) 1222 return dev_err_probe(dev, ret, "Failed to enable supplies"); 1223 1224 return sii902x_init(sii902x); 1225 } 1226 1227 static void sii902x_remove(struct i2c_client *client) 1228 { 1229 struct sii902x *sii902x = i2c_get_clientdata(client); 1230 1231 drm_bridge_remove(&sii902x->bridge); 1232 i2c_mux_del_adapters(sii902x->i2cmux); 1233 1234 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev)) 1235 platform_device_unregister(sii902x->audio.pdev); 1236 } 1237 1238 static const struct of_device_id sii902x_dt_ids[] = { 1239 { .compatible = "sil,sii9022", }, 1240 { } 1241 }; 1242 MODULE_DEVICE_TABLE(of, sii902x_dt_ids); 1243 1244 static const struct i2c_device_id sii902x_i2c_ids[] = { 1245 { "sii9022" }, 1246 { } 1247 }; 1248 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids); 1249 1250 static struct i2c_driver sii902x_driver = { 1251 .probe = sii902x_probe, 1252 .remove = sii902x_remove, 1253 .driver = { 1254 .name = "sii902x", 1255 .of_match_table = sii902x_dt_ids, 1256 }, 1257 .id_table = sii902x_i2c_ids, 1258 }; 1259 module_i2c_driver(sii902x_driver); 1260 1261 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); 1262 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges"); 1263 MODULE_LICENSE("GPL"); 1264