1 /* 2 * Analog Devices ADV7511 HDMI transmitter driver 3 * 4 * Copyright 2012 Analog Devices Inc. 5 * 6 * Licensed under the GPL-2. 7 */ 8 9 #include <linux/device.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/module.h> 12 #include <linux/of_device.h> 13 #include <linux/slab.h> 14 15 #include <drm/drmP.h> 16 #include <drm/drm_atomic.h> 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_edid.h> 19 20 #include "adv7511.h" 21 22 /* ADI recommended values for proper operation. */ 23 static const struct reg_sequence adv7511_fixed_registers[] = { 24 { 0x98, 0x03 }, 25 { 0x9a, 0xe0 }, 26 { 0x9c, 0x30 }, 27 { 0x9d, 0x61 }, 28 { 0xa2, 0xa4 }, 29 { 0xa3, 0xa4 }, 30 { 0xe0, 0xd0 }, 31 { 0xf9, 0x00 }, 32 { 0x55, 0x02 }, 33 }; 34 35 /* ----------------------------------------------------------------------------- 36 * Register access 37 */ 38 39 static const uint8_t adv7511_register_defaults[] = { 40 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */ 41 0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13, 42 0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */ 43 0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84, 44 0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */ 45 0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac, 46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */ 47 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0, 48 0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */ 49 0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 50 0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */ 51 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 52 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */ 53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 54 0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */ 55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */ 57 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 58 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */ 59 0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00, 60 0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */ 61 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14, 62 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */ 63 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 64 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */ 65 0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04, 66 0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */ 67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01, 68 0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */ 69 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 70 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */ 71 0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 72 }; 73 74 static bool adv7511_register_volatile(struct device *dev, unsigned int reg) 75 { 76 switch (reg) { 77 case ADV7511_REG_CHIP_REVISION: 78 case ADV7511_REG_SPDIF_FREQ: 79 case ADV7511_REG_CTS_AUTOMATIC1: 80 case ADV7511_REG_CTS_AUTOMATIC2: 81 case ADV7511_REG_VIC_DETECTED: 82 case ADV7511_REG_VIC_SEND: 83 case ADV7511_REG_AUX_VIC_DETECTED: 84 case ADV7511_REG_STATUS: 85 case ADV7511_REG_GC(1): 86 case ADV7511_REG_INT(0): 87 case ADV7511_REG_INT(1): 88 case ADV7511_REG_PLL_STATUS: 89 case ADV7511_REG_AN(0): 90 case ADV7511_REG_AN(1): 91 case ADV7511_REG_AN(2): 92 case ADV7511_REG_AN(3): 93 case ADV7511_REG_AN(4): 94 case ADV7511_REG_AN(5): 95 case ADV7511_REG_AN(6): 96 case ADV7511_REG_AN(7): 97 case ADV7511_REG_HDCP_STATUS: 98 case ADV7511_REG_BCAPS: 99 case ADV7511_REG_BKSV(0): 100 case ADV7511_REG_BKSV(1): 101 case ADV7511_REG_BKSV(2): 102 case ADV7511_REG_BKSV(3): 103 case ADV7511_REG_BKSV(4): 104 case ADV7511_REG_DDC_STATUS: 105 case ADV7511_REG_EDID_READ_CTRL: 106 case ADV7511_REG_BSTATUS(0): 107 case ADV7511_REG_BSTATUS(1): 108 case ADV7511_REG_CHIP_ID_HIGH: 109 case ADV7511_REG_CHIP_ID_LOW: 110 return true; 111 } 112 113 return false; 114 } 115 116 static const struct regmap_config adv7511_regmap_config = { 117 .reg_bits = 8, 118 .val_bits = 8, 119 120 .max_register = 0xff, 121 .cache_type = REGCACHE_RBTREE, 122 .reg_defaults_raw = adv7511_register_defaults, 123 .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults), 124 125 .volatile_reg = adv7511_register_volatile, 126 }; 127 128 /* ----------------------------------------------------------------------------- 129 * Hardware configuration 130 */ 131 132 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable, 133 const uint16_t *coeff, 134 unsigned int scaling_factor) 135 { 136 unsigned int i; 137 138 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1), 139 ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE); 140 141 if (enable) { 142 for (i = 0; i < 12; ++i) { 143 regmap_update_bits(adv7511->regmap, 144 ADV7511_REG_CSC_UPPER(i), 145 0x1f, coeff[i] >> 8); 146 regmap_write(adv7511->regmap, 147 ADV7511_REG_CSC_LOWER(i), 148 coeff[i] & 0xff); 149 } 150 } 151 152 if (enable) 153 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0), 154 0xe0, 0x80 | (scaling_factor << 5)); 155 else 156 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0), 157 0x80, 0x00); 158 159 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1), 160 ADV7511_CSC_UPDATE_MODE, 0); 161 } 162 163 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet) 164 { 165 if (packet & 0xff) 166 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0, 167 packet, 0xff); 168 169 if (packet & 0xff00) { 170 packet >>= 8; 171 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1, 172 packet, 0xff); 173 } 174 175 return 0; 176 } 177 178 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet) 179 { 180 if (packet & 0xff) 181 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0, 182 packet, 0x00); 183 184 if (packet & 0xff00) { 185 packet >>= 8; 186 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1, 187 packet, 0x00); 188 } 189 190 return 0; 191 } 192 193 /* Coefficients for adv7511 color space conversion */ 194 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = { 195 0x0734, 0x04ad, 0x0000, 0x1c1b, 196 0x1ddc, 0x04ad, 0x1f24, 0x0135, 197 0x0000, 0x04ad, 0x087c, 0x1b77, 198 }; 199 200 static void adv7511_set_config_csc(struct adv7511 *adv7511, 201 struct drm_connector *connector, 202 bool rgb) 203 { 204 struct adv7511_video_config config; 205 bool output_format_422, output_format_ycbcr; 206 unsigned int mode; 207 uint8_t infoframe[17]; 208 209 if (adv7511->edid) 210 config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid); 211 else 212 config.hdmi_mode = false; 213 214 hdmi_avi_infoframe_init(&config.avi_infoframe); 215 216 config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN; 217 218 if (rgb) { 219 config.csc_enable = false; 220 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB; 221 } else { 222 config.csc_scaling_factor = ADV7511_CSC_SCALING_4; 223 config.csc_coefficents = adv7511_csc_ycbcr_to_rgb; 224 225 if ((connector->display_info.color_formats & 226 DRM_COLOR_FORMAT_YCRCB422) && 227 config.hdmi_mode) { 228 config.csc_enable = false; 229 config.avi_infoframe.colorspace = 230 HDMI_COLORSPACE_YUV422; 231 } else { 232 config.csc_enable = true; 233 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB; 234 } 235 } 236 237 if (config.hdmi_mode) { 238 mode = ADV7511_HDMI_CFG_MODE_HDMI; 239 240 switch (config.avi_infoframe.colorspace) { 241 case HDMI_COLORSPACE_YUV444: 242 output_format_422 = false; 243 output_format_ycbcr = true; 244 break; 245 case HDMI_COLORSPACE_YUV422: 246 output_format_422 = true; 247 output_format_ycbcr = true; 248 break; 249 default: 250 output_format_422 = false; 251 output_format_ycbcr = false; 252 break; 253 } 254 } else { 255 mode = ADV7511_HDMI_CFG_MODE_DVI; 256 output_format_422 = false; 257 output_format_ycbcr = false; 258 } 259 260 adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME); 261 262 adv7511_set_colormap(adv7511, config.csc_enable, 263 config.csc_coefficents, 264 config.csc_scaling_factor); 265 266 regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81, 267 (output_format_422 << 7) | output_format_ycbcr); 268 269 regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG, 270 ADV7511_HDMI_CFG_MODE_MASK, mode); 271 272 hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe, 273 sizeof(infoframe)); 274 275 /* The AVI infoframe id is not configurable */ 276 regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION, 277 infoframe + 1, sizeof(infoframe) - 1); 278 279 adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME); 280 } 281 282 static void adv7511_set_link_config(struct adv7511 *adv7511, 283 const struct adv7511_link_config *config) 284 { 285 /* 286 * The input style values documented in the datasheet don't match the 287 * hardware register field values :-( 288 */ 289 static const unsigned int input_styles[4] = { 0, 2, 1, 3 }; 290 291 unsigned int clock_delay; 292 unsigned int color_depth; 293 unsigned int input_id; 294 295 clock_delay = (config->clock_delay + 1200) / 400; 296 color_depth = config->input_color_depth == 8 ? 3 297 : (config->input_color_depth == 10 ? 1 : 2); 298 299 /* TODO Support input ID 6 */ 300 if (config->input_colorspace != HDMI_COLORSPACE_YUV422) 301 input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR 302 ? 5 : 0; 303 else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR) 304 input_id = config->embedded_sync ? 8 : 7; 305 else if (config->input_clock == ADV7511_INPUT_CLOCK_2X) 306 input_id = config->embedded_sync ? 4 : 3; 307 else 308 input_id = config->embedded_sync ? 2 : 1; 309 310 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf, 311 input_id); 312 regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e, 313 (color_depth << 4) | 314 (input_styles[config->input_style] << 2)); 315 regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2, 316 config->input_justification << 3); 317 regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ, 318 config->sync_pulse << 2); 319 320 regmap_write(adv7511->regmap, 0xba, clock_delay << 5); 321 322 adv7511->embedded_sync = config->embedded_sync; 323 adv7511->hsync_polarity = config->hsync_polarity; 324 adv7511->vsync_polarity = config->vsync_polarity; 325 adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB; 326 } 327 328 static void __adv7511_power_on(struct adv7511 *adv7511) 329 { 330 adv7511->current_edid_segment = -1; 331 332 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER, 333 ADV7511_POWER_POWER_DOWN, 0); 334 if (adv7511->i2c_main->irq) { 335 /* 336 * Documentation says the INT_ENABLE registers are reset in 337 * POWER_DOWN mode. My 7511w preserved the bits, however. 338 * Still, let's be safe and stick to the documentation. 339 */ 340 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0), 341 ADV7511_INT0_EDID_READY | ADV7511_INT0_HPD); 342 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1), 343 ADV7511_INT1_DDC_ERROR); 344 } 345 346 /* 347 * Per spec it is allowed to pulse the HPD signal to indicate that the 348 * EDID information has changed. Some monitors do this when they wakeup 349 * from standby or are enabled. When the HPD goes low the adv7511 is 350 * reset and the outputs are disabled which might cause the monitor to 351 * go to standby again. To avoid this we ignore the HPD pin for the 352 * first few seconds after enabling the output. 353 */ 354 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2, 355 ADV7511_REG_POWER2_HPD_SRC_MASK, 356 ADV7511_REG_POWER2_HPD_SRC_NONE); 357 } 358 359 static void adv7511_power_on(struct adv7511 *adv7511) 360 { 361 __adv7511_power_on(adv7511); 362 363 /* 364 * Most of the registers are reset during power down or when HPD is low. 365 */ 366 regcache_sync(adv7511->regmap); 367 368 if (adv7511->type == ADV7533) 369 adv7533_dsi_power_on(adv7511); 370 adv7511->powered = true; 371 } 372 373 static void __adv7511_power_off(struct adv7511 *adv7511) 374 { 375 /* TODO: setup additional power down modes */ 376 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER, 377 ADV7511_POWER_POWER_DOWN, 378 ADV7511_POWER_POWER_DOWN); 379 regcache_mark_dirty(adv7511->regmap); 380 } 381 382 static void adv7511_power_off(struct adv7511 *adv7511) 383 { 384 __adv7511_power_off(adv7511); 385 if (adv7511->type == ADV7533) 386 adv7533_dsi_power_off(adv7511); 387 adv7511->powered = false; 388 } 389 390 /* ----------------------------------------------------------------------------- 391 * Interrupt and hotplug detection 392 */ 393 394 static bool adv7511_hpd(struct adv7511 *adv7511) 395 { 396 unsigned int irq0; 397 int ret; 398 399 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0); 400 if (ret < 0) 401 return false; 402 403 if (irq0 & ADV7511_INT0_HPD) { 404 regmap_write(adv7511->regmap, ADV7511_REG_INT(0), 405 ADV7511_INT0_HPD); 406 return true; 407 } 408 409 return false; 410 } 411 412 static void adv7511_hpd_work(struct work_struct *work) 413 { 414 struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work); 415 enum drm_connector_status status; 416 unsigned int val; 417 int ret; 418 419 ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val); 420 if (ret < 0) 421 status = connector_status_disconnected; 422 else if (val & ADV7511_STATUS_HPD) 423 status = connector_status_connected; 424 else 425 status = connector_status_disconnected; 426 427 if (adv7511->connector.status != status) { 428 adv7511->connector.status = status; 429 drm_kms_helper_hotplug_event(adv7511->connector.dev); 430 } 431 } 432 433 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd) 434 { 435 unsigned int irq0, irq1; 436 int ret; 437 438 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0); 439 if (ret < 0) 440 return ret; 441 442 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1); 443 if (ret < 0) 444 return ret; 445 446 regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0); 447 regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1); 448 449 if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder) 450 schedule_work(&adv7511->hpd_work); 451 452 if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) { 453 adv7511->edid_read = true; 454 455 if (adv7511->i2c_main->irq) 456 wake_up_all(&adv7511->wq); 457 } 458 459 return 0; 460 } 461 462 static irqreturn_t adv7511_irq_handler(int irq, void *devid) 463 { 464 struct adv7511 *adv7511 = devid; 465 int ret; 466 467 ret = adv7511_irq_process(adv7511, true); 468 return ret < 0 ? IRQ_NONE : IRQ_HANDLED; 469 } 470 471 /* ----------------------------------------------------------------------------- 472 * EDID retrieval 473 */ 474 475 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout) 476 { 477 int ret; 478 479 if (adv7511->i2c_main->irq) { 480 ret = wait_event_interruptible_timeout(adv7511->wq, 481 adv7511->edid_read, msecs_to_jiffies(timeout)); 482 } else { 483 for (; timeout > 0; timeout -= 25) { 484 ret = adv7511_irq_process(adv7511, false); 485 if (ret < 0) 486 break; 487 488 if (adv7511->edid_read) 489 break; 490 491 msleep(25); 492 } 493 } 494 495 return adv7511->edid_read ? 0 : -EIO; 496 } 497 498 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block, 499 size_t len) 500 { 501 struct adv7511 *adv7511 = data; 502 struct i2c_msg xfer[2]; 503 uint8_t offset; 504 unsigned int i; 505 int ret; 506 507 if (len > 128) 508 return -EINVAL; 509 510 if (adv7511->current_edid_segment != block / 2) { 511 unsigned int status; 512 513 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS, 514 &status); 515 if (ret < 0) 516 return ret; 517 518 if (status != 2) { 519 adv7511->edid_read = false; 520 regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT, 521 block); 522 ret = adv7511_wait_for_edid(adv7511, 200); 523 if (ret < 0) 524 return ret; 525 } 526 527 /* Break this apart, hopefully more I2C controllers will 528 * support 64 byte transfers than 256 byte transfers 529 */ 530 531 xfer[0].addr = adv7511->i2c_edid->addr; 532 xfer[0].flags = 0; 533 xfer[0].len = 1; 534 xfer[0].buf = &offset; 535 xfer[1].addr = adv7511->i2c_edid->addr; 536 xfer[1].flags = I2C_M_RD; 537 xfer[1].len = 64; 538 xfer[1].buf = adv7511->edid_buf; 539 540 offset = 0; 541 542 for (i = 0; i < 4; ++i) { 543 ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer, 544 ARRAY_SIZE(xfer)); 545 if (ret < 0) 546 return ret; 547 else if (ret != 2) 548 return -EIO; 549 550 xfer[1].buf += 64; 551 offset += 64; 552 } 553 554 adv7511->current_edid_segment = block / 2; 555 } 556 557 if (block % 2 == 0) 558 memcpy(buf, adv7511->edid_buf, len); 559 else 560 memcpy(buf, adv7511->edid_buf + 128, len); 561 562 return 0; 563 } 564 565 /* ----------------------------------------------------------------------------- 566 * ADV75xx helpers 567 */ 568 569 static int adv7511_get_modes(struct adv7511 *adv7511, 570 struct drm_connector *connector) 571 { 572 struct edid *edid; 573 unsigned int count; 574 575 /* Reading the EDID only works if the device is powered */ 576 if (!adv7511->powered) { 577 unsigned int edid_i2c_addr = 578 (adv7511->i2c_main->addr << 1) + 4; 579 580 __adv7511_power_on(adv7511); 581 582 /* Reset the EDID_I2C_ADDR register as it might be cleared */ 583 regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, 584 edid_i2c_addr); 585 } 586 587 edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511); 588 589 if (!adv7511->powered) 590 __adv7511_power_off(adv7511); 591 592 kfree(adv7511->edid); 593 adv7511->edid = edid; 594 if (!edid) 595 return 0; 596 597 drm_mode_connector_update_edid_property(connector, edid); 598 count = drm_add_edid_modes(connector, edid); 599 600 adv7511_set_config_csc(adv7511, connector, adv7511->rgb); 601 602 return count; 603 } 604 605 static enum drm_connector_status 606 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector) 607 { 608 enum drm_connector_status status; 609 unsigned int val; 610 bool hpd; 611 int ret; 612 613 ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val); 614 if (ret < 0) 615 return connector_status_disconnected; 616 617 if (val & ADV7511_STATUS_HPD) 618 status = connector_status_connected; 619 else 620 status = connector_status_disconnected; 621 622 hpd = adv7511_hpd(adv7511); 623 624 /* The chip resets itself when the cable is disconnected, so in case 625 * there is a pending HPD interrupt and the cable is connected there was 626 * at least one transition from disconnected to connected and the chip 627 * has to be reinitialized. */ 628 if (status == connector_status_connected && hpd && adv7511->powered) { 629 regcache_mark_dirty(adv7511->regmap); 630 adv7511_power_on(adv7511); 631 adv7511_get_modes(adv7511, connector); 632 if (adv7511->status == connector_status_connected) 633 status = connector_status_disconnected; 634 } else { 635 /* Renable HPD sensing */ 636 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2, 637 ADV7511_REG_POWER2_HPD_SRC_MASK, 638 ADV7511_REG_POWER2_HPD_SRC_BOTH); 639 } 640 641 adv7511->status = status; 642 return status; 643 } 644 645 static int adv7511_mode_valid(struct adv7511 *adv7511, 646 struct drm_display_mode *mode) 647 { 648 if (mode->clock > 165000) 649 return MODE_CLOCK_HIGH; 650 651 return MODE_OK; 652 } 653 654 static void adv7511_mode_set(struct adv7511 *adv7511, 655 struct drm_display_mode *mode, 656 struct drm_display_mode *adj_mode) 657 { 658 unsigned int low_refresh_rate; 659 unsigned int hsync_polarity = 0; 660 unsigned int vsync_polarity = 0; 661 662 if (adv7511->embedded_sync) { 663 unsigned int hsync_offset, hsync_len; 664 unsigned int vsync_offset, vsync_len; 665 666 hsync_offset = adj_mode->crtc_hsync_start - 667 adj_mode->crtc_hdisplay; 668 vsync_offset = adj_mode->crtc_vsync_start - 669 adj_mode->crtc_vdisplay; 670 hsync_len = adj_mode->crtc_hsync_end - 671 adj_mode->crtc_hsync_start; 672 vsync_len = adj_mode->crtc_vsync_end - 673 adj_mode->crtc_vsync_start; 674 675 /* The hardware vsync generator has a off-by-one bug */ 676 vsync_offset += 1; 677 678 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB, 679 ((hsync_offset >> 10) & 0x7) << 5); 680 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0), 681 (hsync_offset >> 2) & 0xff); 682 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1), 683 ((hsync_offset & 0x3) << 6) | 684 ((hsync_len >> 4) & 0x3f)); 685 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2), 686 ((hsync_len & 0xf) << 4) | 687 ((vsync_offset >> 6) & 0xf)); 688 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3), 689 ((vsync_offset & 0x3f) << 2) | 690 ((vsync_len >> 8) & 0x3)); 691 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4), 692 vsync_len & 0xff); 693 694 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC); 695 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC); 696 } else { 697 enum adv7511_sync_polarity mode_hsync_polarity; 698 enum adv7511_sync_polarity mode_vsync_polarity; 699 700 /** 701 * If the input signal is always low or always high we want to 702 * invert or let it passthrough depending on the polarity of the 703 * current mode. 704 **/ 705 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC) 706 mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW; 707 else 708 mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH; 709 710 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC) 711 mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW; 712 else 713 mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH; 714 715 if (adv7511->hsync_polarity != mode_hsync_polarity && 716 adv7511->hsync_polarity != 717 ADV7511_SYNC_POLARITY_PASSTHROUGH) 718 hsync_polarity = 1; 719 720 if (adv7511->vsync_polarity != mode_vsync_polarity && 721 adv7511->vsync_polarity != 722 ADV7511_SYNC_POLARITY_PASSTHROUGH) 723 vsync_polarity = 1; 724 } 725 726 if (mode->vrefresh <= 24000) 727 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ; 728 else if (mode->vrefresh <= 25000) 729 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ; 730 else if (mode->vrefresh <= 30000) 731 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ; 732 else 733 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE; 734 735 regmap_update_bits(adv7511->regmap, 0xfb, 736 0x6, low_refresh_rate << 1); 737 regmap_update_bits(adv7511->regmap, 0x17, 738 0x60, (vsync_polarity << 6) | (hsync_polarity << 5)); 739 740 if (adv7511->type == ADV7533) 741 adv7533_mode_set(adv7511, adj_mode); 742 743 drm_mode_copy(&adv7511->curr_mode, adj_mode); 744 745 /* 746 * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is 747 * supposed to give better results. 748 */ 749 750 adv7511->f_tmds = mode->clock; 751 } 752 753 /* Connector funcs */ 754 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector) 755 { 756 return container_of(connector, struct adv7511, connector); 757 } 758 759 static int adv7511_connector_get_modes(struct drm_connector *connector) 760 { 761 struct adv7511 *adv = connector_to_adv7511(connector); 762 763 return adv7511_get_modes(adv, connector); 764 } 765 766 static enum drm_mode_status 767 adv7511_connector_mode_valid(struct drm_connector *connector, 768 struct drm_display_mode *mode) 769 { 770 struct adv7511 *adv = connector_to_adv7511(connector); 771 772 return adv7511_mode_valid(adv, mode); 773 } 774 775 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = { 776 .get_modes = adv7511_connector_get_modes, 777 .mode_valid = adv7511_connector_mode_valid, 778 }; 779 780 static enum drm_connector_status 781 adv7511_connector_detect(struct drm_connector *connector, bool force) 782 { 783 struct adv7511 *adv = connector_to_adv7511(connector); 784 785 return adv7511_detect(adv, connector); 786 } 787 788 static struct drm_connector_funcs adv7511_connector_funcs = { 789 .dpms = drm_atomic_helper_connector_dpms, 790 .fill_modes = drm_helper_probe_single_connector_modes, 791 .detect = adv7511_connector_detect, 792 .destroy = drm_connector_cleanup, 793 .reset = drm_atomic_helper_connector_reset, 794 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 795 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 796 }; 797 798 /* Bridge funcs */ 799 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge) 800 { 801 return container_of(bridge, struct adv7511, bridge); 802 } 803 804 static void adv7511_bridge_enable(struct drm_bridge *bridge) 805 { 806 struct adv7511 *adv = bridge_to_adv7511(bridge); 807 808 adv7511_power_on(adv); 809 } 810 811 static void adv7511_bridge_disable(struct drm_bridge *bridge) 812 { 813 struct adv7511 *adv = bridge_to_adv7511(bridge); 814 815 adv7511_power_off(adv); 816 } 817 818 static void adv7511_bridge_mode_set(struct drm_bridge *bridge, 819 struct drm_display_mode *mode, 820 struct drm_display_mode *adj_mode) 821 { 822 struct adv7511 *adv = bridge_to_adv7511(bridge); 823 824 adv7511_mode_set(adv, mode, adj_mode); 825 } 826 827 static int adv7511_bridge_attach(struct drm_bridge *bridge) 828 { 829 struct adv7511 *adv = bridge_to_adv7511(bridge); 830 int ret; 831 832 if (!bridge->encoder) { 833 DRM_ERROR("Parent encoder object not found"); 834 return -ENODEV; 835 } 836 837 adv->connector.polled = DRM_CONNECTOR_POLL_HPD; 838 839 ret = drm_connector_init(bridge->dev, &adv->connector, 840 &adv7511_connector_funcs, 841 DRM_MODE_CONNECTOR_HDMIA); 842 if (ret) { 843 DRM_ERROR("Failed to initialize connector with drm\n"); 844 return ret; 845 } 846 drm_connector_helper_add(&adv->connector, 847 &adv7511_connector_helper_funcs); 848 drm_mode_connector_attach_encoder(&adv->connector, bridge->encoder); 849 850 if (adv->type == ADV7533) 851 ret = adv7533_attach_dsi(adv); 852 853 if (adv->i2c_main->irq) 854 regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0), 855 ADV7511_INT0_HPD); 856 857 return ret; 858 } 859 860 static struct drm_bridge_funcs adv7511_bridge_funcs = { 861 .enable = adv7511_bridge_enable, 862 .disable = adv7511_bridge_disable, 863 .mode_set = adv7511_bridge_mode_set, 864 .attach = adv7511_bridge_attach, 865 }; 866 867 /* ----------------------------------------------------------------------------- 868 * Probe & remove 869 */ 870 871 static const char * const adv7511_supply_names[] = { 872 "avdd", 873 "dvdd", 874 "pvdd", 875 "bgvdd", 876 "dvdd-3v", 877 }; 878 879 static const char * const adv7533_supply_names[] = { 880 "avdd", 881 "dvdd", 882 "pvdd", 883 "a2vdd", 884 "v3p3", 885 "v1p2", 886 }; 887 888 static int adv7511_init_regulators(struct adv7511 *adv) 889 { 890 struct device *dev = &adv->i2c_main->dev; 891 const char * const *supply_names; 892 unsigned int i; 893 int ret; 894 895 if (adv->type == ADV7511) { 896 supply_names = adv7511_supply_names; 897 adv->num_supplies = ARRAY_SIZE(adv7511_supply_names); 898 } else { 899 supply_names = adv7533_supply_names; 900 adv->num_supplies = ARRAY_SIZE(adv7533_supply_names); 901 } 902 903 adv->supplies = devm_kcalloc(dev, adv->num_supplies, 904 sizeof(*adv->supplies), GFP_KERNEL); 905 if (!adv->supplies) 906 return -ENOMEM; 907 908 for (i = 0; i < adv->num_supplies; i++) 909 adv->supplies[i].supply = supply_names[i]; 910 911 ret = devm_regulator_bulk_get(dev, adv->num_supplies, adv->supplies); 912 if (ret) 913 return ret; 914 915 return regulator_bulk_enable(adv->num_supplies, adv->supplies); 916 } 917 918 static void adv7511_uninit_regulators(struct adv7511 *adv) 919 { 920 regulator_bulk_disable(adv->num_supplies, adv->supplies); 921 } 922 923 static int adv7511_parse_dt(struct device_node *np, 924 struct adv7511_link_config *config) 925 { 926 const char *str; 927 int ret; 928 929 of_property_read_u32(np, "adi,input-depth", &config->input_color_depth); 930 if (config->input_color_depth != 8 && config->input_color_depth != 10 && 931 config->input_color_depth != 12) 932 return -EINVAL; 933 934 ret = of_property_read_string(np, "adi,input-colorspace", &str); 935 if (ret < 0) 936 return ret; 937 938 if (!strcmp(str, "rgb")) 939 config->input_colorspace = HDMI_COLORSPACE_RGB; 940 else if (!strcmp(str, "yuv422")) 941 config->input_colorspace = HDMI_COLORSPACE_YUV422; 942 else if (!strcmp(str, "yuv444")) 943 config->input_colorspace = HDMI_COLORSPACE_YUV444; 944 else 945 return -EINVAL; 946 947 ret = of_property_read_string(np, "adi,input-clock", &str); 948 if (ret < 0) 949 return ret; 950 951 if (!strcmp(str, "1x")) 952 config->input_clock = ADV7511_INPUT_CLOCK_1X; 953 else if (!strcmp(str, "2x")) 954 config->input_clock = ADV7511_INPUT_CLOCK_2X; 955 else if (!strcmp(str, "ddr")) 956 config->input_clock = ADV7511_INPUT_CLOCK_DDR; 957 else 958 return -EINVAL; 959 960 if (config->input_colorspace == HDMI_COLORSPACE_YUV422 || 961 config->input_clock != ADV7511_INPUT_CLOCK_1X) { 962 ret = of_property_read_u32(np, "adi,input-style", 963 &config->input_style); 964 if (ret) 965 return ret; 966 967 if (config->input_style < 1 || config->input_style > 3) 968 return -EINVAL; 969 970 ret = of_property_read_string(np, "adi,input-justification", 971 &str); 972 if (ret < 0) 973 return ret; 974 975 if (!strcmp(str, "left")) 976 config->input_justification = 977 ADV7511_INPUT_JUSTIFICATION_LEFT; 978 else if (!strcmp(str, "evenly")) 979 config->input_justification = 980 ADV7511_INPUT_JUSTIFICATION_EVENLY; 981 else if (!strcmp(str, "right")) 982 config->input_justification = 983 ADV7511_INPUT_JUSTIFICATION_RIGHT; 984 else 985 return -EINVAL; 986 987 } else { 988 config->input_style = 1; 989 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT; 990 } 991 992 of_property_read_u32(np, "adi,clock-delay", &config->clock_delay); 993 if (config->clock_delay < -1200 || config->clock_delay > 1600) 994 return -EINVAL; 995 996 config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync"); 997 998 /* Hardcode the sync pulse configurations for now. */ 999 config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE; 1000 config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH; 1001 config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH; 1002 1003 return 0; 1004 } 1005 1006 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 1007 { 1008 struct adv7511_link_config link_config; 1009 struct adv7511 *adv7511; 1010 struct device *dev = &i2c->dev; 1011 unsigned int main_i2c_addr = i2c->addr << 1; 1012 unsigned int edid_i2c_addr = main_i2c_addr + 4; 1013 unsigned int val; 1014 int ret; 1015 1016 if (!dev->of_node) 1017 return -EINVAL; 1018 1019 adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL); 1020 if (!adv7511) 1021 return -ENOMEM; 1022 1023 adv7511->i2c_main = i2c; 1024 adv7511->powered = false; 1025 adv7511->status = connector_status_disconnected; 1026 1027 if (dev->of_node) 1028 adv7511->type = (enum adv7511_type)of_device_get_match_data(dev); 1029 else 1030 adv7511->type = id->driver_data; 1031 1032 memset(&link_config, 0, sizeof(link_config)); 1033 1034 if (adv7511->type == ADV7511) 1035 ret = adv7511_parse_dt(dev->of_node, &link_config); 1036 else 1037 ret = adv7533_parse_dt(dev->of_node, adv7511); 1038 if (ret) 1039 return ret; 1040 1041 ret = adv7511_init_regulators(adv7511); 1042 if (ret) { 1043 dev_err(dev, "failed to init regulators\n"); 1044 return ret; 1045 } 1046 1047 /* 1048 * The power down GPIO is optional. If present, toggle it from active to 1049 * inactive to wake up the encoder. 1050 */ 1051 adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH); 1052 if (IS_ERR(adv7511->gpio_pd)) { 1053 ret = PTR_ERR(adv7511->gpio_pd); 1054 goto uninit_regulators; 1055 } 1056 1057 if (adv7511->gpio_pd) { 1058 mdelay(5); 1059 gpiod_set_value_cansleep(adv7511->gpio_pd, 0); 1060 } 1061 1062 adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config); 1063 if (IS_ERR(adv7511->regmap)) { 1064 ret = PTR_ERR(adv7511->regmap); 1065 goto uninit_regulators; 1066 } 1067 1068 ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val); 1069 if (ret) 1070 goto uninit_regulators; 1071 dev_dbg(dev, "Rev. %d\n", val); 1072 1073 if (adv7511->type == ADV7511) 1074 ret = regmap_register_patch(adv7511->regmap, 1075 adv7511_fixed_registers, 1076 ARRAY_SIZE(adv7511_fixed_registers)); 1077 else 1078 ret = adv7533_patch_registers(adv7511); 1079 if (ret) 1080 goto uninit_regulators; 1081 1082 regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr); 1083 regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR, 1084 main_i2c_addr - 0xa); 1085 regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, 1086 main_i2c_addr - 2); 1087 1088 adv7511_packet_disable(adv7511, 0xffff); 1089 1090 adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1); 1091 if (!adv7511->i2c_edid) { 1092 ret = -ENOMEM; 1093 goto uninit_regulators; 1094 } 1095 1096 if (adv7511->type == ADV7533) { 1097 ret = adv7533_init_cec(adv7511); 1098 if (ret) 1099 goto err_i2c_unregister_edid; 1100 } 1101 1102 INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work); 1103 1104 if (i2c->irq) { 1105 init_waitqueue_head(&adv7511->wq); 1106 1107 ret = devm_request_threaded_irq(dev, i2c->irq, NULL, 1108 adv7511_irq_handler, 1109 IRQF_ONESHOT, dev_name(dev), 1110 adv7511); 1111 if (ret) 1112 goto err_unregister_cec; 1113 } 1114 1115 /* CEC is unused for now */ 1116 regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL, 1117 ADV7511_CEC_CTRL_POWER_DOWN); 1118 1119 adv7511_power_off(adv7511); 1120 1121 i2c_set_clientdata(i2c, adv7511); 1122 1123 if (adv7511->type == ADV7511) 1124 adv7511_set_link_config(adv7511, &link_config); 1125 1126 adv7511->bridge.funcs = &adv7511_bridge_funcs; 1127 adv7511->bridge.of_node = dev->of_node; 1128 1129 ret = drm_bridge_add(&adv7511->bridge); 1130 if (ret) { 1131 dev_err(dev, "failed to add adv7511 bridge\n"); 1132 goto err_unregister_cec; 1133 } 1134 1135 adv7511_audio_init(dev, adv7511); 1136 1137 return 0; 1138 1139 err_unregister_cec: 1140 adv7533_uninit_cec(adv7511); 1141 err_i2c_unregister_edid: 1142 i2c_unregister_device(adv7511->i2c_edid); 1143 uninit_regulators: 1144 adv7511_uninit_regulators(adv7511); 1145 1146 return ret; 1147 } 1148 1149 static int adv7511_remove(struct i2c_client *i2c) 1150 { 1151 struct adv7511 *adv7511 = i2c_get_clientdata(i2c); 1152 1153 if (adv7511->type == ADV7533) { 1154 adv7533_detach_dsi(adv7511); 1155 adv7533_uninit_cec(adv7511); 1156 } 1157 1158 adv7511_uninit_regulators(adv7511); 1159 1160 drm_bridge_remove(&adv7511->bridge); 1161 1162 adv7511_audio_exit(adv7511); 1163 1164 i2c_unregister_device(adv7511->i2c_edid); 1165 1166 kfree(adv7511->edid); 1167 1168 return 0; 1169 } 1170 1171 static const struct i2c_device_id adv7511_i2c_ids[] = { 1172 { "adv7511", ADV7511 }, 1173 { "adv7511w", ADV7511 }, 1174 { "adv7513", ADV7511 }, 1175 #ifdef CONFIG_DRM_I2C_ADV7533 1176 { "adv7533", ADV7533 }, 1177 #endif 1178 { } 1179 }; 1180 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids); 1181 1182 static const struct of_device_id adv7511_of_ids[] = { 1183 { .compatible = "adi,adv7511", .data = (void *)ADV7511 }, 1184 { .compatible = "adi,adv7511w", .data = (void *)ADV7511 }, 1185 { .compatible = "adi,adv7513", .data = (void *)ADV7511 }, 1186 #ifdef CONFIG_DRM_I2C_ADV7533 1187 { .compatible = "adi,adv7533", .data = (void *)ADV7533 }, 1188 #endif 1189 { } 1190 }; 1191 MODULE_DEVICE_TABLE(of, adv7511_of_ids); 1192 1193 static struct mipi_dsi_driver adv7533_dsi_driver = { 1194 .driver.name = "adv7533", 1195 }; 1196 1197 static struct i2c_driver adv7511_driver = { 1198 .driver = { 1199 .name = "adv7511", 1200 .of_match_table = adv7511_of_ids, 1201 }, 1202 .id_table = adv7511_i2c_ids, 1203 .probe = adv7511_probe, 1204 .remove = adv7511_remove, 1205 }; 1206 1207 static int __init adv7511_init(void) 1208 { 1209 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) 1210 mipi_dsi_driver_register(&adv7533_dsi_driver); 1211 1212 return i2c_add_driver(&adv7511_driver); 1213 } 1214 module_init(adv7511_init); 1215 1216 static void __exit adv7511_exit(void) 1217 { 1218 i2c_del_driver(&adv7511_driver); 1219 1220 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) 1221 mipi_dsi_driver_unregister(&adv7533_dsi_driver); 1222 } 1223 module_exit(adv7511_exit); 1224 1225 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 1226 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver"); 1227 MODULE_LICENSE("GPL"); 1228