1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2018 Renesas Electronics 4 * 5 * Copyright (C) 2016 Atmel 6 * Bo Shen <voice.shen@atmel.com> 7 * 8 * Authors: Bo Shen <voice.shen@atmel.com> 9 * Boris Brezillon <boris.brezillon@free-electrons.com> 10 * Wu, Songjun <Songjun.Wu@atmel.com> 11 * 12 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved. 13 */ 14 15 #include <linux/gpio/consumer.h> 16 #include <linux/i2c-mux.h> 17 #include <linux/i2c.h> 18 #include <linux/module.h> 19 #include <linux/regmap.h> 20 #include <linux/clk.h> 21 22 #include <drm/drm_atomic_helper.h> 23 #include <drm/drm_bridge.h> 24 #include <drm/drm_drv.h> 25 #include <drm/drm_edid.h> 26 #include <drm/drm_print.h> 27 #include <drm/drm_probe_helper.h> 28 29 #include <sound/hdmi-codec.h> 30 31 #define SII902X_TPI_VIDEO_DATA 0x0 32 33 #define SII902X_TPI_PIXEL_REPETITION 0x8 34 #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5) 35 #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4) 36 #define SII902X_TPI_AVI_PIXEL_REP_4X 3 37 #define SII902X_TPI_AVI_PIXEL_REP_2X 1 38 #define SII902X_TPI_AVI_PIXEL_REP_NONE 0 39 #define SII902X_TPI_CLK_RATIO_HALF (0 << 6) 40 #define SII902X_TPI_CLK_RATIO_1X (1 << 6) 41 #define SII902X_TPI_CLK_RATIO_2X (2 << 6) 42 #define SII902X_TPI_CLK_RATIO_4X (3 << 6) 43 44 #define SII902X_TPI_AVI_IN_FORMAT 0x9 45 #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7) 46 #define SII902X_TPI_AVI_INPUT_DITHER BIT(6) 47 #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2) 48 #define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2) 49 #define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2) 50 #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0) 51 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0) 52 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0) 53 #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0) 54 55 #define SII902X_TPI_AVI_INFOFRAME 0x0c 56 57 #define SII902X_SYS_CTRL_DATA 0x1a 58 #define SII902X_SYS_CTRL_PWR_DWN BIT(4) 59 #define SII902X_SYS_CTRL_AV_MUTE BIT(3) 60 #define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2) 61 #define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1) 62 #define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0) 63 #define SII902X_SYS_CTRL_OUTPUT_HDMI 1 64 #define SII902X_SYS_CTRL_OUTPUT_DVI 0 65 66 #define SII902X_REG_CHIPID(n) (0x1b + (n)) 67 68 #define SII902X_PWR_STATE_CTRL 0x1e 69 #define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0) 70 #define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK) 71 72 /* Audio */ 73 #define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f 74 #define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0) 75 #define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0) 76 #define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0) 77 #define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0) 78 #define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2) 79 #define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3) 80 #define SII902X_TPI_I2S_SELECT_SD0 (0 << 4) 81 #define SII902X_TPI_I2S_SELECT_SD1 (1 << 4) 82 #define SII902X_TPI_I2S_SELECT_SD2 (2 << 4) 83 #define SII902X_TPI_I2S_SELECT_SD3 (3 << 4) 84 #define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7) 85 86 #define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20 87 #define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0) 88 #define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0) 89 #define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1) 90 #define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1) 91 #define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2) 92 #define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2) 93 #define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3) 94 #define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3) 95 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4) 96 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4) 97 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4) 98 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4) 99 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4) 100 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4) 101 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4) 102 #define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4) 103 #define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7) 104 #define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7) 105 106 #define SII902X_TPI_I2S_STRM_HDR_BASE 0x21 107 #define SII902X_TPI_I2S_STRM_HDR_SIZE 5 108 109 #define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26 110 #define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0) 111 #define SII902X_TPI_AUDIO_CODING_PCM (1 << 0) 112 #define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0) 113 #define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0) 114 #define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0) 115 #define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0) 116 #define SII902X_TPI_AUDIO_CODING_AAC (6 << 0) 117 #define SII902X_TPI_AUDIO_CODING_DTS (7 << 0) 118 #define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0) 119 #define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4) 120 #define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4) 121 #define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5) 122 #define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5) 123 #define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6) 124 #define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6) 125 #define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6) 126 127 #define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27 128 #define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3) 129 #define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3) 130 #define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3) 131 #define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3) 132 #define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3) 133 #define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3) 134 #define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3) 135 #define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3) 136 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6) 137 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6) 138 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6) 139 #define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6) 140 141 #define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28 142 143 #define SII902X_INT_ENABLE 0x3c 144 #define SII902X_INT_STATUS 0x3d 145 #define SII902X_HOTPLUG_EVENT BIT(0) 146 #define SII902X_PLUGGED_STATUS BIT(2) 147 148 #define SII902X_REG_TPI_RQB 0xc7 149 150 /* Indirect internal register access */ 151 #define SII902X_IND_SET_PAGE 0xbc 152 #define SII902X_IND_OFFSET 0xbd 153 #define SII902X_IND_VALUE 0xbe 154 155 #define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf 156 #define SII902X_TPI_MISC_INFOFRAME_END 0xde 157 #define SII902X_TPI_MISC_INFOFRAME_SIZE \ 158 (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE) 159 160 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500 161 162 #define SII902X_AUDIO_PORT_INDEX 3 163 164 struct sii902x { 165 struct i2c_client *i2c; 166 struct regmap *regmap; 167 struct drm_bridge bridge; 168 struct drm_connector connector; 169 struct gpio_desc *reset_gpio; 170 struct i2c_mux_core *i2cmux; 171 /* 172 * Mutex protects audio and video functions from interfering 173 * each other, by keeping their i2c command sequences atomic. 174 */ 175 struct mutex mutex; 176 struct sii902x_audio { 177 struct platform_device *pdev; 178 struct clk *mclk; 179 u32 i2s_fifo_sequence[4]; 180 } audio; 181 }; 182 183 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val) 184 { 185 union i2c_smbus_data data; 186 int ret; 187 188 ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, 189 I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data); 190 191 if (ret < 0) 192 return ret; 193 194 *val = data.byte; 195 return 0; 196 } 197 198 static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val) 199 { 200 union i2c_smbus_data data; 201 202 data.byte = val; 203 204 return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, 205 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA, 206 &data); 207 } 208 209 static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask, 210 u8 val) 211 { 212 int ret; 213 u8 status; 214 215 ret = sii902x_read_unlocked(i2c, reg, &status); 216 if (ret) 217 return ret; 218 status &= ~mask; 219 status |= val & mask; 220 return sii902x_write_unlocked(i2c, reg, status); 221 } 222 223 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge) 224 { 225 return container_of(bridge, struct sii902x, bridge); 226 } 227 228 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con) 229 { 230 return container_of(con, struct sii902x, connector); 231 } 232 233 static void sii902x_reset(struct sii902x *sii902x) 234 { 235 if (!sii902x->reset_gpio) 236 return; 237 238 gpiod_set_value(sii902x->reset_gpio, 1); 239 240 /* The datasheet says treset-min = 100us. Make it 150us to be sure. */ 241 usleep_range(150, 200); 242 243 gpiod_set_value(sii902x->reset_gpio, 0); 244 } 245 246 static enum drm_connector_status 247 sii902x_connector_detect(struct drm_connector *connector, bool force) 248 { 249 struct sii902x *sii902x = connector_to_sii902x(connector); 250 unsigned int status; 251 252 mutex_lock(&sii902x->mutex); 253 254 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 255 256 mutex_unlock(&sii902x->mutex); 257 258 return (status & SII902X_PLUGGED_STATUS) ? 259 connector_status_connected : connector_status_disconnected; 260 } 261 262 static const struct drm_connector_funcs sii902x_connector_funcs = { 263 .detect = sii902x_connector_detect, 264 .fill_modes = drm_helper_probe_single_connector_modes, 265 .destroy = drm_connector_cleanup, 266 .reset = drm_atomic_helper_connector_reset, 267 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 268 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 269 }; 270 271 static int sii902x_get_modes(struct drm_connector *connector) 272 { 273 struct sii902x *sii902x = connector_to_sii902x(connector); 274 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 275 u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI; 276 struct edid *edid; 277 int num = 0, ret; 278 279 mutex_lock(&sii902x->mutex); 280 281 edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]); 282 drm_connector_update_edid_property(connector, edid); 283 if (edid) { 284 if (drm_detect_hdmi_monitor(edid)) 285 output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI; 286 287 num = drm_add_edid_modes(connector, edid); 288 kfree(edid); 289 } 290 291 ret = drm_display_info_set_bus_formats(&connector->display_info, 292 &bus_format, 1); 293 if (ret) 294 goto error_out; 295 296 ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 297 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode); 298 if (ret) 299 goto error_out; 300 301 ret = num; 302 303 error_out: 304 mutex_unlock(&sii902x->mutex); 305 306 return ret; 307 } 308 309 static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector, 310 struct drm_display_mode *mode) 311 { 312 /* TODO: check mode */ 313 314 return MODE_OK; 315 } 316 317 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = { 318 .get_modes = sii902x_get_modes, 319 .mode_valid = sii902x_mode_valid, 320 }; 321 322 static void sii902x_bridge_disable(struct drm_bridge *bridge) 323 { 324 struct sii902x *sii902x = bridge_to_sii902x(bridge); 325 326 mutex_lock(&sii902x->mutex); 327 328 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 329 SII902X_SYS_CTRL_PWR_DWN, 330 SII902X_SYS_CTRL_PWR_DWN); 331 332 mutex_unlock(&sii902x->mutex); 333 } 334 335 static void sii902x_bridge_enable(struct drm_bridge *bridge) 336 { 337 struct sii902x *sii902x = bridge_to_sii902x(bridge); 338 339 mutex_lock(&sii902x->mutex); 340 341 regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL, 342 SII902X_AVI_POWER_STATE_MSK, 343 SII902X_AVI_POWER_STATE_D(0)); 344 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, 345 SII902X_SYS_CTRL_PWR_DWN, 0); 346 347 mutex_unlock(&sii902x->mutex); 348 } 349 350 static void sii902x_bridge_mode_set(struct drm_bridge *bridge, 351 const struct drm_display_mode *mode, 352 const struct drm_display_mode *adj) 353 { 354 struct sii902x *sii902x = bridge_to_sii902x(bridge); 355 struct regmap *regmap = sii902x->regmap; 356 u8 buf[HDMI_INFOFRAME_SIZE(AVI)]; 357 struct hdmi_avi_infoframe frame; 358 u16 pixel_clock_10kHz = adj->clock / 10; 359 int ret; 360 361 buf[0] = pixel_clock_10kHz & 0xff; 362 buf[1] = pixel_clock_10kHz >> 8; 363 buf[2] = drm_mode_vrefresh(adj); 364 buf[3] = 0x00; 365 buf[4] = adj->hdisplay; 366 buf[5] = adj->hdisplay >> 8; 367 buf[6] = adj->vdisplay; 368 buf[7] = adj->vdisplay >> 8; 369 buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE | 370 SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT; 371 buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO | 372 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB; 373 374 mutex_lock(&sii902x->mutex); 375 376 ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10); 377 if (ret) 378 goto out; 379 380 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, 381 &sii902x->connector, adj); 382 if (ret < 0) { 383 DRM_ERROR("couldn't fill AVI infoframe\n"); 384 goto out; 385 } 386 387 ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf)); 388 if (ret < 0) { 389 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); 390 goto out; 391 } 392 393 /* Do not send the infoframe header, but keep the CRC field. */ 394 regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME, 395 buf + HDMI_INFOFRAME_HEADER_SIZE - 1, 396 HDMI_AVI_INFOFRAME_SIZE + 1); 397 398 out: 399 mutex_unlock(&sii902x->mutex); 400 } 401 402 static int sii902x_bridge_attach(struct drm_bridge *bridge, 403 enum drm_bridge_attach_flags flags) 404 { 405 struct sii902x *sii902x = bridge_to_sii902x(bridge); 406 struct drm_device *drm = bridge->dev; 407 int ret; 408 409 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { 410 DRM_ERROR("Fix bridge driver to make connector optional!"); 411 return -EINVAL; 412 } 413 414 drm_connector_helper_add(&sii902x->connector, 415 &sii902x_connector_helper_funcs); 416 417 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) { 418 dev_err(&sii902x->i2c->dev, 419 "sii902x driver is only compatible with DRM devices supporting atomic updates\n"); 420 return -ENOTSUPP; 421 } 422 423 ret = drm_connector_init(drm, &sii902x->connector, 424 &sii902x_connector_funcs, 425 DRM_MODE_CONNECTOR_HDMIA); 426 if (ret) 427 return ret; 428 429 if (sii902x->i2c->irq > 0) 430 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD; 431 else 432 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT; 433 434 drm_connector_attach_encoder(&sii902x->connector, bridge->encoder); 435 436 return 0; 437 } 438 439 static const struct drm_bridge_funcs sii902x_bridge_funcs = { 440 .attach = sii902x_bridge_attach, 441 .mode_set = sii902x_bridge_mode_set, 442 .disable = sii902x_bridge_disable, 443 .enable = sii902x_bridge_enable, 444 }; 445 446 static int sii902x_mute(struct sii902x *sii902x, bool mute) 447 { 448 struct device *dev = &sii902x->i2c->dev; 449 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE : 450 SII902X_TPI_AUDIO_MUTE_DISABLE; 451 452 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted"); 453 454 return regmap_update_bits(sii902x->regmap, 455 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 456 SII902X_TPI_AUDIO_MUTE_ENABLE, val); 457 } 458 459 static const int sii902x_mclk_div_table[] = { 460 128, 256, 384, 512, 768, 1024, 1152, 192 }; 461 462 static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate, 463 unsigned int mclk) 464 { 465 int div = mclk / rate; 466 int distance = 100000; 467 u8 i, nearest = 0; 468 469 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) { 470 unsigned int d = abs(div - sii902x_mclk_div_table[i]); 471 472 if (d >= distance) 473 continue; 474 475 nearest = i; 476 distance = d; 477 if (d == 0) 478 break; 479 } 480 481 *i2s_config_reg |= nearest << 4; 482 483 return sii902x_mclk_div_table[nearest]; 484 } 485 486 static const struct sii902x_sample_freq { 487 u32 freq; 488 u8 val; 489 } sii902x_sample_freq[] = { 490 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ }, 491 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ }, 492 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ }, 493 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ }, 494 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ }, 495 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ }, 496 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ }, 497 }; 498 499 static int sii902x_audio_hw_params(struct device *dev, void *data, 500 struct hdmi_codec_daifmt *daifmt, 501 struct hdmi_codec_params *params) 502 { 503 struct sii902x *sii902x = dev_get_drvdata(dev); 504 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST; 505 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S | 506 SII902X_TPI_AUDIO_MUTE_ENABLE | 507 SII902X_TPI_AUDIO_CODING_PCM); 508 u8 config_byte3_reg = 0; 509 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)]; 510 unsigned long mclk_rate; 511 int i, ret; 512 513 if (daifmt->bit_clk_master || daifmt->frame_clk_master) { 514 dev_dbg(dev, "%s: I2S master mode not supported\n", __func__); 515 return -EINVAL; 516 } 517 518 switch (daifmt->fmt) { 519 case HDMI_I2S: 520 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES | 521 SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 522 break; 523 case HDMI_RIGHT_J: 524 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT; 525 break; 526 case HDMI_LEFT_J: 527 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT; 528 break; 529 default: 530 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__, 531 daifmt->fmt); 532 return -EINVAL; 533 } 534 535 if (daifmt->bit_clk_inv) 536 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING; 537 else 538 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING; 539 540 if (daifmt->frame_clk_inv) 541 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW; 542 else 543 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH; 544 545 if (params->channels > 2) 546 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS; 547 else 548 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS; 549 550 switch (params->sample_width) { 551 case 16: 552 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16; 553 break; 554 case 20: 555 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20; 556 break; 557 case 24: 558 case 32: 559 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24; 560 break; 561 default: 562 dev_err(dev, "%s: Unsupported sample width %u\n", __func__, 563 params->sample_width); 564 return -EINVAL; 565 } 566 567 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) { 568 if (params->sample_rate == sii902x_sample_freq[i].freq) { 569 config_byte3_reg |= sii902x_sample_freq[i].val; 570 break; 571 } 572 } 573 574 ret = clk_prepare_enable(sii902x->audio.mclk); 575 if (ret) { 576 dev_err(dev, "Enabling mclk failed: %d\n", ret); 577 return ret; 578 } 579 580 if (sii902x->audio.mclk) { 581 mclk_rate = clk_get_rate(sii902x->audio.mclk); 582 ret = sii902x_select_mclk_div(&i2s_config_reg, 583 params->sample_rate, mclk_rate); 584 if (mclk_rate != ret * params->sample_rate) 585 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n", 586 mclk_rate, ret, params->sample_rate); 587 } 588 589 mutex_lock(&sii902x->mutex); 590 591 ret = regmap_write(sii902x->regmap, 592 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 593 config_byte2_reg); 594 if (ret < 0) 595 goto out; 596 597 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG, 598 i2s_config_reg); 599 if (ret) 600 goto out; 601 602 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) && 603 sii902x->audio.i2s_fifo_sequence[i]; i++) 604 regmap_write(sii902x->regmap, 605 SII902X_TPI_I2S_ENABLE_MAPPING_REG, 606 sii902x->audio.i2s_fifo_sequence[i]); 607 608 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG, 609 config_byte3_reg); 610 if (ret) 611 goto out; 612 613 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE, 614 params->iec.status, 615 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE, 616 sizeof(params->iec.status))); 617 if (ret) 618 goto out; 619 620 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf, 621 sizeof(infoframe_buf)); 622 if (ret < 0) { 623 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n", 624 __func__, ret); 625 goto out; 626 } 627 628 ret = regmap_bulk_write(sii902x->regmap, 629 SII902X_TPI_MISC_INFOFRAME_BASE, 630 infoframe_buf, 631 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE)); 632 if (ret) 633 goto out; 634 635 /* Decode Level 0 Packets */ 636 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02); 637 if (ret) 638 goto out; 639 640 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24); 641 if (ret) 642 goto out; 643 644 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02); 645 if (ret) 646 goto out; 647 648 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__); 649 out: 650 mutex_unlock(&sii902x->mutex); 651 652 if (ret) { 653 clk_disable_unprepare(sii902x->audio.mclk); 654 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__, 655 ret); 656 } 657 658 return ret; 659 } 660 661 static void sii902x_audio_shutdown(struct device *dev, void *data) 662 { 663 struct sii902x *sii902x = dev_get_drvdata(dev); 664 665 mutex_lock(&sii902x->mutex); 666 667 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG, 668 SII902X_TPI_AUDIO_INTERFACE_DISABLE); 669 670 mutex_unlock(&sii902x->mutex); 671 672 clk_disable_unprepare(sii902x->audio.mclk); 673 } 674 675 static int sii902x_audio_mute(struct device *dev, void *data, 676 bool enable, int direction) 677 { 678 struct sii902x *sii902x = dev_get_drvdata(dev); 679 680 mutex_lock(&sii902x->mutex); 681 682 sii902x_mute(sii902x, enable); 683 684 mutex_unlock(&sii902x->mutex); 685 686 return 0; 687 } 688 689 static int sii902x_audio_get_eld(struct device *dev, void *data, 690 uint8_t *buf, size_t len) 691 { 692 struct sii902x *sii902x = dev_get_drvdata(dev); 693 694 mutex_lock(&sii902x->mutex); 695 696 memcpy(buf, sii902x->connector.eld, 697 min(sizeof(sii902x->connector.eld), len)); 698 699 mutex_unlock(&sii902x->mutex); 700 701 return 0; 702 } 703 704 static int sii902x_audio_get_dai_id(struct snd_soc_component *component, 705 struct device_node *endpoint) 706 { 707 struct of_endpoint of_ep; 708 int ret; 709 710 ret = of_graph_parse_endpoint(endpoint, &of_ep); 711 if (ret < 0) 712 return ret; 713 714 /* 715 * HDMI sound should be located at reg = <3> 716 * Return expected DAI index 0. 717 */ 718 if (of_ep.port == SII902X_AUDIO_PORT_INDEX) 719 return 0; 720 721 return -EINVAL; 722 } 723 724 static const struct hdmi_codec_ops sii902x_audio_codec_ops = { 725 .hw_params = sii902x_audio_hw_params, 726 .audio_shutdown = sii902x_audio_shutdown, 727 .mute_stream = sii902x_audio_mute, 728 .get_eld = sii902x_audio_get_eld, 729 .get_dai_id = sii902x_audio_get_dai_id, 730 .no_capture_mute = 1, 731 }; 732 733 static int sii902x_audio_codec_init(struct sii902x *sii902x, 734 struct device *dev) 735 { 736 static const u8 audio_fifo_id[] = { 737 SII902X_TPI_I2S_CONFIG_FIFO0, 738 SII902X_TPI_I2S_CONFIG_FIFO1, 739 SII902X_TPI_I2S_CONFIG_FIFO2, 740 SII902X_TPI_I2S_CONFIG_FIFO3, 741 }; 742 static const u8 i2s_lane_id[] = { 743 SII902X_TPI_I2S_SELECT_SD0, 744 SII902X_TPI_I2S_SELECT_SD1, 745 SII902X_TPI_I2S_SELECT_SD2, 746 SII902X_TPI_I2S_SELECT_SD3, 747 }; 748 struct hdmi_codec_pdata codec_data = { 749 .ops = &sii902x_audio_codec_ops, 750 .i2s = 1, /* Only i2s support for now. */ 751 .spdif = 0, 752 .max_i2s_channels = 0, 753 }; 754 u8 lanes[4]; 755 int num_lanes, i; 756 757 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) { 758 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n", 759 __func__); 760 return 0; 761 } 762 763 num_lanes = of_property_read_variable_u8_array(dev->of_node, 764 "sil,i2s-data-lanes", 765 lanes, 1, 766 ARRAY_SIZE(lanes)); 767 768 if (num_lanes == -EINVAL) { 769 dev_dbg(dev, 770 "%s: No \"sil,i2s-data-lanes\", use default <0>\n", 771 __func__); 772 num_lanes = 1; 773 lanes[0] = 0; 774 } else if (num_lanes < 0) { 775 dev_err(dev, 776 "%s: Error gettin \"sil,i2s-data-lanes\": %d\n", 777 __func__, num_lanes); 778 return num_lanes; 779 } 780 codec_data.max_i2s_channels = 2 * num_lanes; 781 782 for (i = 0; i < num_lanes; i++) 783 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] | 784 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE; 785 786 sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk"); 787 if (IS_ERR(sii902x->audio.mclk)) { 788 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n", 789 __func__, PTR_ERR(sii902x->audio.mclk)); 790 return PTR_ERR(sii902x->audio.mclk); 791 } 792 793 sii902x->audio.pdev = platform_device_register_data( 794 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 795 &codec_data, sizeof(codec_data)); 796 797 return PTR_ERR_OR_ZERO(sii902x->audio.pdev); 798 } 799 800 static const struct regmap_range sii902x_volatile_ranges[] = { 801 { .range_min = 0, .range_max = 0xff }, 802 }; 803 804 static const struct regmap_access_table sii902x_volatile_table = { 805 .yes_ranges = sii902x_volatile_ranges, 806 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges), 807 }; 808 809 static const struct regmap_config sii902x_regmap_config = { 810 .reg_bits = 8, 811 .val_bits = 8, 812 .disable_locking = true, /* struct sii902x mutex should be enough */ 813 .max_register = SII902X_TPI_MISC_INFOFRAME_END, 814 .volatile_table = &sii902x_volatile_table, 815 .cache_type = REGCACHE_NONE, 816 }; 817 818 static irqreturn_t sii902x_interrupt(int irq, void *data) 819 { 820 struct sii902x *sii902x = data; 821 unsigned int status = 0; 822 823 mutex_lock(&sii902x->mutex); 824 825 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 826 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 827 828 mutex_unlock(&sii902x->mutex); 829 830 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) 831 drm_helper_hpd_irq_event(sii902x->bridge.dev); 832 833 return IRQ_HANDLED; 834 } 835 836 /* 837 * The purpose of sii902x_i2c_bypass_select is to enable the pass through 838 * mode of the HDMI transmitter. Do not use regmap from within this function, 839 * only use sii902x_*_unlocked functions to read/modify/write registers. 840 * We are holding the parent adapter lock here, keep this in mind before 841 * adding more i2c transactions. 842 * 843 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 844 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 845 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 846 * we leave the remaining bits as we have found them. 847 */ 848 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id) 849 { 850 struct sii902x *sii902x = i2c_mux_priv(mux); 851 struct device *dev = &sii902x->i2c->dev; 852 unsigned long timeout; 853 u8 status; 854 int ret; 855 856 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 857 SII902X_SYS_CTRL_DDC_BUS_REQ, 858 SII902X_SYS_CTRL_DDC_BUS_REQ); 859 if (ret) 860 return ret; 861 862 timeout = jiffies + 863 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 864 do { 865 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 866 &status); 867 if (ret) 868 return ret; 869 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) && 870 time_before(jiffies, timeout)); 871 872 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 873 dev_err(dev, "Failed to acquire the i2c bus\n"); 874 return -ETIMEDOUT; 875 } 876 877 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 878 status); 879 } 880 881 /* 882 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through 883 * mode of the HDMI transmitter. Do not use regmap from within this function, 884 * only use sii902x_*_unlocked functions to read/modify/write registers. 885 * We are holding the parent adapter lock here, keep this in mind before 886 * adding more i2c transactions. 887 * 888 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere 889 * in this driver, we need to make sure that we only touch 0x1A[2:1] from 890 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that 891 * we leave the remaining bits as we have found them. 892 */ 893 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id) 894 { 895 struct sii902x *sii902x = i2c_mux_priv(mux); 896 struct device *dev = &sii902x->i2c->dev; 897 unsigned long timeout; 898 unsigned int retries; 899 u8 status; 900 int ret; 901 902 /* 903 * When the HDMI transmitter is in pass through mode, we need an 904 * (undocumented) additional delay between STOP and START conditions 905 * to guarantee the bus won't get stuck. 906 */ 907 udelay(30); 908 909 /* 910 * Sometimes the I2C bus can stall after failure to use the 911 * EDID channel. Retry a few times to see if things clear 912 * up, else continue anyway. 913 */ 914 retries = 5; 915 do { 916 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 917 &status); 918 retries--; 919 } while (ret && retries); 920 if (ret) { 921 dev_err(dev, "failed to read status (%d)\n", ret); 922 return ret; 923 } 924 925 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 926 SII902X_SYS_CTRL_DDC_BUS_REQ | 927 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0); 928 if (ret) 929 return ret; 930 931 timeout = jiffies + 932 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); 933 do { 934 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, 935 &status); 936 if (ret) 937 return ret; 938 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 939 SII902X_SYS_CTRL_DDC_BUS_GRTD) && 940 time_before(jiffies, timeout)); 941 942 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | 943 SII902X_SYS_CTRL_DDC_BUS_GRTD)) { 944 dev_err(dev, "failed to release the i2c bus\n"); 945 return -ETIMEDOUT; 946 } 947 948 return 0; 949 } 950 951 static const struct drm_bridge_timings default_sii902x_timings = { 952 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 953 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE 954 | DRM_BUS_FLAG_DE_HIGH, 955 }; 956 957 static int sii902x_probe(struct i2c_client *client, 958 const struct i2c_device_id *id) 959 { 960 struct device *dev = &client->dev; 961 unsigned int status = 0; 962 struct sii902x *sii902x; 963 u8 chipid[4]; 964 int ret; 965 966 ret = i2c_check_functionality(client->adapter, 967 I2C_FUNC_SMBUS_BYTE_DATA); 968 if (!ret) { 969 dev_err(dev, "I2C adapter not suitable\n"); 970 return -EIO; 971 } 972 973 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL); 974 if (!sii902x) 975 return -ENOMEM; 976 977 sii902x->i2c = client; 978 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config); 979 if (IS_ERR(sii902x->regmap)) 980 return PTR_ERR(sii902x->regmap); 981 982 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset", 983 GPIOD_OUT_LOW); 984 if (IS_ERR(sii902x->reset_gpio)) { 985 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n", 986 PTR_ERR(sii902x->reset_gpio)); 987 return PTR_ERR(sii902x->reset_gpio); 988 } 989 990 mutex_init(&sii902x->mutex); 991 992 sii902x_reset(sii902x); 993 994 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0); 995 if (ret) 996 return ret; 997 998 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0), 999 &chipid, 4); 1000 if (ret) { 1001 dev_err(dev, "regmap_read failed %d\n", ret); 1002 return ret; 1003 } 1004 1005 if (chipid[0] != 0xb0) { 1006 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n", 1007 chipid[0]); 1008 return -EINVAL; 1009 } 1010 1011 /* Clear all pending interrupts */ 1012 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); 1013 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); 1014 1015 if (client->irq > 0) { 1016 regmap_write(sii902x->regmap, SII902X_INT_ENABLE, 1017 SII902X_HOTPLUG_EVENT); 1018 1019 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1020 sii902x_interrupt, 1021 IRQF_ONESHOT, dev_name(dev), 1022 sii902x); 1023 if (ret) 1024 return ret; 1025 } 1026 1027 sii902x->bridge.funcs = &sii902x_bridge_funcs; 1028 sii902x->bridge.of_node = dev->of_node; 1029 sii902x->bridge.timings = &default_sii902x_timings; 1030 drm_bridge_add(&sii902x->bridge); 1031 1032 sii902x_audio_codec_init(sii902x, dev); 1033 1034 i2c_set_clientdata(client, sii902x); 1035 1036 sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev, 1037 1, 0, I2C_MUX_GATE, 1038 sii902x_i2c_bypass_select, 1039 sii902x_i2c_bypass_deselect); 1040 if (!sii902x->i2cmux) 1041 return -ENOMEM; 1042 1043 sii902x->i2cmux->priv = sii902x; 1044 return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0); 1045 } 1046 1047 static int sii902x_remove(struct i2c_client *client) 1048 1049 { 1050 struct sii902x *sii902x = i2c_get_clientdata(client); 1051 1052 i2c_mux_del_adapters(sii902x->i2cmux); 1053 drm_bridge_remove(&sii902x->bridge); 1054 1055 return 0; 1056 } 1057 1058 static const struct of_device_id sii902x_dt_ids[] = { 1059 { .compatible = "sil,sii9022", }, 1060 { } 1061 }; 1062 MODULE_DEVICE_TABLE(of, sii902x_dt_ids); 1063 1064 static const struct i2c_device_id sii902x_i2c_ids[] = { 1065 { "sii9022", 0 }, 1066 { }, 1067 }; 1068 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids); 1069 1070 static struct i2c_driver sii902x_driver = { 1071 .probe = sii902x_probe, 1072 .remove = sii902x_remove, 1073 .driver = { 1074 .name = "sii902x", 1075 .of_match_table = sii902x_dt_ids, 1076 }, 1077 .id_table = sii902x_i2c_ids, 1078 }; 1079 module_i2c_driver(sii902x_driver); 1080 1081 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); 1082 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges"); 1083 MODULE_LICENSE("GPL"); 1084