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); 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 * Most of the registers are reset during power down or when HPD is low. 360 */ 361 regcache_sync(adv7511->regmap); 362 363 if (adv7511->type == ADV7533) 364 adv7533_dsi_power_on(adv7511); 365 366 adv7511->powered = true; 367 } 368 369 static void adv7511_power_off(struct adv7511 *adv7511) 370 { 371 /* TODO: setup additional power down modes */ 372 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER, 373 ADV7511_POWER_POWER_DOWN, 374 ADV7511_POWER_POWER_DOWN); 375 regcache_mark_dirty(adv7511->regmap); 376 377 if (adv7511->type == ADV7533) 378 adv7533_dsi_power_off(adv7511); 379 380 adv7511->powered = false; 381 } 382 383 /* ----------------------------------------------------------------------------- 384 * Interrupt and hotplug detection 385 */ 386 387 static bool adv7511_hpd(struct adv7511 *adv7511) 388 { 389 unsigned int irq0; 390 int ret; 391 392 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0); 393 if (ret < 0) 394 return false; 395 396 if (irq0 & ADV7511_INT0_HPD) { 397 regmap_write(adv7511->regmap, ADV7511_REG_INT(0), 398 ADV7511_INT0_HPD); 399 return true; 400 } 401 402 return false; 403 } 404 405 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd) 406 { 407 unsigned int irq0, irq1; 408 int ret; 409 410 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0); 411 if (ret < 0) 412 return ret; 413 414 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1); 415 if (ret < 0) 416 return ret; 417 418 regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0); 419 regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1); 420 421 if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder) 422 drm_helper_hpd_irq_event(adv7511->connector.dev); 423 424 if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) { 425 adv7511->edid_read = true; 426 427 if (adv7511->i2c_main->irq) 428 wake_up_all(&adv7511->wq); 429 } 430 431 return 0; 432 } 433 434 static irqreturn_t adv7511_irq_handler(int irq, void *devid) 435 { 436 struct adv7511 *adv7511 = devid; 437 int ret; 438 439 ret = adv7511_irq_process(adv7511, true); 440 return ret < 0 ? IRQ_NONE : IRQ_HANDLED; 441 } 442 443 /* ----------------------------------------------------------------------------- 444 * EDID retrieval 445 */ 446 447 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout) 448 { 449 int ret; 450 451 if (adv7511->i2c_main->irq) { 452 ret = wait_event_interruptible_timeout(adv7511->wq, 453 adv7511->edid_read, msecs_to_jiffies(timeout)); 454 } else { 455 for (; timeout > 0; timeout -= 25) { 456 ret = adv7511_irq_process(adv7511, false); 457 if (ret < 0) 458 break; 459 460 if (adv7511->edid_read) 461 break; 462 463 msleep(25); 464 } 465 } 466 467 return adv7511->edid_read ? 0 : -EIO; 468 } 469 470 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block, 471 size_t len) 472 { 473 struct adv7511 *adv7511 = data; 474 struct i2c_msg xfer[2]; 475 uint8_t offset; 476 unsigned int i; 477 int ret; 478 479 if (len > 128) 480 return -EINVAL; 481 482 if (adv7511->current_edid_segment != block / 2) { 483 unsigned int status; 484 485 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS, 486 &status); 487 if (ret < 0) 488 return ret; 489 490 if (status != 2) { 491 adv7511->edid_read = false; 492 regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT, 493 block); 494 ret = adv7511_wait_for_edid(adv7511, 200); 495 if (ret < 0) 496 return ret; 497 } 498 499 /* Break this apart, hopefully more I2C controllers will 500 * support 64 byte transfers than 256 byte transfers 501 */ 502 503 xfer[0].addr = adv7511->i2c_edid->addr; 504 xfer[0].flags = 0; 505 xfer[0].len = 1; 506 xfer[0].buf = &offset; 507 xfer[1].addr = adv7511->i2c_edid->addr; 508 xfer[1].flags = I2C_M_RD; 509 xfer[1].len = 64; 510 xfer[1].buf = adv7511->edid_buf; 511 512 offset = 0; 513 514 for (i = 0; i < 4; ++i) { 515 ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer, 516 ARRAY_SIZE(xfer)); 517 if (ret < 0) 518 return ret; 519 else if (ret != 2) 520 return -EIO; 521 522 xfer[1].buf += 64; 523 offset += 64; 524 } 525 526 adv7511->current_edid_segment = block / 2; 527 } 528 529 if (block % 2 == 0) 530 memcpy(buf, adv7511->edid_buf, len); 531 else 532 memcpy(buf, adv7511->edid_buf + 128, len); 533 534 return 0; 535 } 536 537 /* ----------------------------------------------------------------------------- 538 * ADV75xx helpers 539 */ 540 541 static int adv7511_get_modes(struct adv7511 *adv7511, 542 struct drm_connector *connector) 543 { 544 struct edid *edid; 545 unsigned int count; 546 547 /* Reading the EDID only works if the device is powered */ 548 if (!adv7511->powered) { 549 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER, 550 ADV7511_POWER_POWER_DOWN, 0); 551 if (adv7511->i2c_main->irq) { 552 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0), 553 ADV7511_INT0_EDID_READY); 554 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1), 555 ADV7511_INT1_DDC_ERROR); 556 } 557 adv7511->current_edid_segment = -1; 558 } 559 560 edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511); 561 562 if (!adv7511->powered) 563 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER, 564 ADV7511_POWER_POWER_DOWN, 565 ADV7511_POWER_POWER_DOWN); 566 567 kfree(adv7511->edid); 568 adv7511->edid = edid; 569 if (!edid) 570 return 0; 571 572 drm_mode_connector_update_edid_property(connector, edid); 573 count = drm_add_edid_modes(connector, edid); 574 575 adv7511_set_config_csc(adv7511, connector, adv7511->rgb); 576 577 return count; 578 } 579 580 static enum drm_connector_status 581 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector) 582 { 583 enum drm_connector_status status; 584 unsigned int val; 585 bool hpd; 586 int ret; 587 588 ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val); 589 if (ret < 0) 590 return connector_status_disconnected; 591 592 if (val & ADV7511_STATUS_HPD) 593 status = connector_status_connected; 594 else 595 status = connector_status_disconnected; 596 597 hpd = adv7511_hpd(adv7511); 598 599 /* The chip resets itself when the cable is disconnected, so in case 600 * there is a pending HPD interrupt and the cable is connected there was 601 * at least one transition from disconnected to connected and the chip 602 * has to be reinitialized. */ 603 if (status == connector_status_connected && hpd && adv7511->powered) { 604 regcache_mark_dirty(adv7511->regmap); 605 adv7511_power_on(adv7511); 606 adv7511_get_modes(adv7511, connector); 607 if (adv7511->status == connector_status_connected) 608 status = connector_status_disconnected; 609 } else { 610 /* Renable HPD sensing */ 611 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2, 612 ADV7511_REG_POWER2_HPD_SRC_MASK, 613 ADV7511_REG_POWER2_HPD_SRC_BOTH); 614 } 615 616 adv7511->status = status; 617 return status; 618 } 619 620 static int adv7511_mode_valid(struct adv7511 *adv7511, 621 struct drm_display_mode *mode) 622 { 623 if (mode->clock > 165000) 624 return MODE_CLOCK_HIGH; 625 626 return MODE_OK; 627 } 628 629 static void adv7511_mode_set(struct adv7511 *adv7511, 630 struct drm_display_mode *mode, 631 struct drm_display_mode *adj_mode) 632 { 633 unsigned int low_refresh_rate; 634 unsigned int hsync_polarity = 0; 635 unsigned int vsync_polarity = 0; 636 637 if (adv7511->embedded_sync) { 638 unsigned int hsync_offset, hsync_len; 639 unsigned int vsync_offset, vsync_len; 640 641 hsync_offset = adj_mode->crtc_hsync_start - 642 adj_mode->crtc_hdisplay; 643 vsync_offset = adj_mode->crtc_vsync_start - 644 adj_mode->crtc_vdisplay; 645 hsync_len = adj_mode->crtc_hsync_end - 646 adj_mode->crtc_hsync_start; 647 vsync_len = adj_mode->crtc_vsync_end - 648 adj_mode->crtc_vsync_start; 649 650 /* The hardware vsync generator has a off-by-one bug */ 651 vsync_offset += 1; 652 653 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB, 654 ((hsync_offset >> 10) & 0x7) << 5); 655 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0), 656 (hsync_offset >> 2) & 0xff); 657 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1), 658 ((hsync_offset & 0x3) << 6) | 659 ((hsync_len >> 4) & 0x3f)); 660 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2), 661 ((hsync_len & 0xf) << 4) | 662 ((vsync_offset >> 6) & 0xf)); 663 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3), 664 ((vsync_offset & 0x3f) << 2) | 665 ((vsync_len >> 8) & 0x3)); 666 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4), 667 vsync_len & 0xff); 668 669 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC); 670 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC); 671 } else { 672 enum adv7511_sync_polarity mode_hsync_polarity; 673 enum adv7511_sync_polarity mode_vsync_polarity; 674 675 /** 676 * If the input signal is always low or always high we want to 677 * invert or let it passthrough depending on the polarity of the 678 * current mode. 679 **/ 680 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC) 681 mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW; 682 else 683 mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH; 684 685 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC) 686 mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW; 687 else 688 mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH; 689 690 if (adv7511->hsync_polarity != mode_hsync_polarity && 691 adv7511->hsync_polarity != 692 ADV7511_SYNC_POLARITY_PASSTHROUGH) 693 hsync_polarity = 1; 694 695 if (adv7511->vsync_polarity != mode_vsync_polarity && 696 adv7511->vsync_polarity != 697 ADV7511_SYNC_POLARITY_PASSTHROUGH) 698 vsync_polarity = 1; 699 } 700 701 if (mode->vrefresh <= 24000) 702 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ; 703 else if (mode->vrefresh <= 25000) 704 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ; 705 else if (mode->vrefresh <= 30000) 706 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ; 707 else 708 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE; 709 710 regmap_update_bits(adv7511->regmap, 0xfb, 711 0x6, low_refresh_rate << 1); 712 regmap_update_bits(adv7511->regmap, 0x17, 713 0x60, (vsync_polarity << 6) | (hsync_polarity << 5)); 714 715 if (adv7511->type == ADV7533) 716 adv7533_mode_set(adv7511, adj_mode); 717 718 drm_mode_copy(&adv7511->curr_mode, adj_mode); 719 720 /* 721 * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is 722 * supposed to give better results. 723 */ 724 725 adv7511->f_tmds = mode->clock; 726 } 727 728 /* Connector funcs */ 729 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector) 730 { 731 return container_of(connector, struct adv7511, connector); 732 } 733 734 static int adv7511_connector_get_modes(struct drm_connector *connector) 735 { 736 struct adv7511 *adv = connector_to_adv7511(connector); 737 738 return adv7511_get_modes(adv, connector); 739 } 740 741 static enum drm_mode_status 742 adv7511_connector_mode_valid(struct drm_connector *connector, 743 struct drm_display_mode *mode) 744 { 745 struct adv7511 *adv = connector_to_adv7511(connector); 746 747 return adv7511_mode_valid(adv, mode); 748 } 749 750 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = { 751 .get_modes = adv7511_connector_get_modes, 752 .mode_valid = adv7511_connector_mode_valid, 753 }; 754 755 static enum drm_connector_status 756 adv7511_connector_detect(struct drm_connector *connector, bool force) 757 { 758 struct adv7511 *adv = connector_to_adv7511(connector); 759 760 return adv7511_detect(adv, connector); 761 } 762 763 static struct drm_connector_funcs adv7511_connector_funcs = { 764 .dpms = drm_atomic_helper_connector_dpms, 765 .fill_modes = drm_helper_probe_single_connector_modes, 766 .detect = adv7511_connector_detect, 767 .destroy = drm_connector_cleanup, 768 .reset = drm_atomic_helper_connector_reset, 769 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 770 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 771 }; 772 773 /* Bridge funcs */ 774 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge) 775 { 776 return container_of(bridge, struct adv7511, bridge); 777 } 778 779 static void adv7511_bridge_enable(struct drm_bridge *bridge) 780 { 781 struct adv7511 *adv = bridge_to_adv7511(bridge); 782 783 adv7511_power_on(adv); 784 } 785 786 static void adv7511_bridge_disable(struct drm_bridge *bridge) 787 { 788 struct adv7511 *adv = bridge_to_adv7511(bridge); 789 790 adv7511_power_off(adv); 791 } 792 793 static void adv7511_bridge_mode_set(struct drm_bridge *bridge, 794 struct drm_display_mode *mode, 795 struct drm_display_mode *adj_mode) 796 { 797 struct adv7511 *adv = bridge_to_adv7511(bridge); 798 799 adv7511_mode_set(adv, mode, adj_mode); 800 } 801 802 static int adv7511_bridge_attach(struct drm_bridge *bridge) 803 { 804 struct adv7511 *adv = bridge_to_adv7511(bridge); 805 int ret; 806 807 if (!bridge->encoder) { 808 DRM_ERROR("Parent encoder object not found"); 809 return -ENODEV; 810 } 811 812 adv->connector.polled = DRM_CONNECTOR_POLL_HPD; 813 814 ret = drm_connector_init(bridge->dev, &adv->connector, 815 &adv7511_connector_funcs, 816 DRM_MODE_CONNECTOR_HDMIA); 817 if (ret) { 818 DRM_ERROR("Failed to initialize connector with drm\n"); 819 return ret; 820 } 821 drm_connector_helper_add(&adv->connector, 822 &adv7511_connector_helper_funcs); 823 drm_mode_connector_attach_encoder(&adv->connector, bridge->encoder); 824 825 if (adv->type == ADV7533) 826 ret = adv7533_attach_dsi(adv); 827 828 return ret; 829 } 830 831 static struct drm_bridge_funcs adv7511_bridge_funcs = { 832 .enable = adv7511_bridge_enable, 833 .disable = adv7511_bridge_disable, 834 .mode_set = adv7511_bridge_mode_set, 835 .attach = adv7511_bridge_attach, 836 }; 837 838 /* ----------------------------------------------------------------------------- 839 * Probe & remove 840 */ 841 842 static int adv7511_parse_dt(struct device_node *np, 843 struct adv7511_link_config *config) 844 { 845 const char *str; 846 int ret; 847 848 of_property_read_u32(np, "adi,input-depth", &config->input_color_depth); 849 if (config->input_color_depth != 8 && config->input_color_depth != 10 && 850 config->input_color_depth != 12) 851 return -EINVAL; 852 853 ret = of_property_read_string(np, "adi,input-colorspace", &str); 854 if (ret < 0) 855 return ret; 856 857 if (!strcmp(str, "rgb")) 858 config->input_colorspace = HDMI_COLORSPACE_RGB; 859 else if (!strcmp(str, "yuv422")) 860 config->input_colorspace = HDMI_COLORSPACE_YUV422; 861 else if (!strcmp(str, "yuv444")) 862 config->input_colorspace = HDMI_COLORSPACE_YUV444; 863 else 864 return -EINVAL; 865 866 ret = of_property_read_string(np, "adi,input-clock", &str); 867 if (ret < 0) 868 return ret; 869 870 if (!strcmp(str, "1x")) 871 config->input_clock = ADV7511_INPUT_CLOCK_1X; 872 else if (!strcmp(str, "2x")) 873 config->input_clock = ADV7511_INPUT_CLOCK_2X; 874 else if (!strcmp(str, "ddr")) 875 config->input_clock = ADV7511_INPUT_CLOCK_DDR; 876 else 877 return -EINVAL; 878 879 if (config->input_colorspace == HDMI_COLORSPACE_YUV422 || 880 config->input_clock != ADV7511_INPUT_CLOCK_1X) { 881 ret = of_property_read_u32(np, "adi,input-style", 882 &config->input_style); 883 if (ret) 884 return ret; 885 886 if (config->input_style < 1 || config->input_style > 3) 887 return -EINVAL; 888 889 ret = of_property_read_string(np, "adi,input-justification", 890 &str); 891 if (ret < 0) 892 return ret; 893 894 if (!strcmp(str, "left")) 895 config->input_justification = 896 ADV7511_INPUT_JUSTIFICATION_LEFT; 897 else if (!strcmp(str, "evenly")) 898 config->input_justification = 899 ADV7511_INPUT_JUSTIFICATION_EVENLY; 900 else if (!strcmp(str, "right")) 901 config->input_justification = 902 ADV7511_INPUT_JUSTIFICATION_RIGHT; 903 else 904 return -EINVAL; 905 906 } else { 907 config->input_style = 1; 908 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT; 909 } 910 911 of_property_read_u32(np, "adi,clock-delay", &config->clock_delay); 912 if (config->clock_delay < -1200 || config->clock_delay > 1600) 913 return -EINVAL; 914 915 config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync"); 916 917 /* Hardcode the sync pulse configurations for now. */ 918 config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE; 919 config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH; 920 config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH; 921 922 return 0; 923 } 924 925 static const int edid_i2c_addr = 0x7e; 926 static const int packet_i2c_addr = 0x70; 927 static const int cec_i2c_addr = 0x78; 928 929 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 930 { 931 struct adv7511_link_config link_config; 932 struct adv7511 *adv7511; 933 struct device *dev = &i2c->dev; 934 unsigned int val; 935 int ret; 936 937 if (!dev->of_node) 938 return -EINVAL; 939 940 adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL); 941 if (!adv7511) 942 return -ENOMEM; 943 944 adv7511->powered = false; 945 adv7511->status = connector_status_disconnected; 946 947 if (dev->of_node) 948 adv7511->type = (enum adv7511_type)of_device_get_match_data(dev); 949 else 950 adv7511->type = id->driver_data; 951 952 memset(&link_config, 0, sizeof(link_config)); 953 954 if (adv7511->type == ADV7511) 955 ret = adv7511_parse_dt(dev->of_node, &link_config); 956 else 957 ret = adv7533_parse_dt(dev->of_node, adv7511); 958 if (ret) 959 return ret; 960 961 /* 962 * The power down GPIO is optional. If present, toggle it from active to 963 * inactive to wake up the encoder. 964 */ 965 adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH); 966 if (IS_ERR(adv7511->gpio_pd)) 967 return PTR_ERR(adv7511->gpio_pd); 968 969 if (adv7511->gpio_pd) { 970 mdelay(5); 971 gpiod_set_value_cansleep(adv7511->gpio_pd, 0); 972 } 973 974 adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config); 975 if (IS_ERR(adv7511->regmap)) 976 return PTR_ERR(adv7511->regmap); 977 978 ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val); 979 if (ret) 980 return ret; 981 dev_dbg(dev, "Rev. %d\n", val); 982 983 if (adv7511->type == ADV7511) 984 ret = regmap_register_patch(adv7511->regmap, 985 adv7511_fixed_registers, 986 ARRAY_SIZE(adv7511_fixed_registers)); 987 else 988 ret = adv7533_patch_registers(adv7511); 989 if (ret) 990 return ret; 991 992 regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr); 993 regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR, 994 packet_i2c_addr); 995 regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr); 996 adv7511_packet_disable(adv7511, 0xffff); 997 998 adv7511->i2c_main = i2c; 999 adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1); 1000 if (!adv7511->i2c_edid) 1001 return -ENOMEM; 1002 1003 if (adv7511->type == ADV7533) { 1004 ret = adv7533_init_cec(adv7511); 1005 if (ret) 1006 goto err_i2c_unregister_edid; 1007 } 1008 1009 if (i2c->irq) { 1010 init_waitqueue_head(&adv7511->wq); 1011 1012 ret = devm_request_threaded_irq(dev, i2c->irq, NULL, 1013 adv7511_irq_handler, 1014 IRQF_ONESHOT, dev_name(dev), 1015 adv7511); 1016 if (ret) 1017 goto err_unregister_cec; 1018 } 1019 1020 /* CEC is unused for now */ 1021 regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL, 1022 ADV7511_CEC_CTRL_POWER_DOWN); 1023 1024 adv7511_power_off(adv7511); 1025 1026 i2c_set_clientdata(i2c, adv7511); 1027 1028 if (adv7511->type == ADV7511) 1029 adv7511_set_link_config(adv7511, &link_config); 1030 1031 adv7511->bridge.funcs = &adv7511_bridge_funcs; 1032 adv7511->bridge.of_node = dev->of_node; 1033 1034 ret = drm_bridge_add(&adv7511->bridge); 1035 if (ret) { 1036 dev_err(dev, "failed to add adv7511 bridge\n"); 1037 goto err_unregister_cec; 1038 } 1039 1040 return 0; 1041 1042 err_unregister_cec: 1043 adv7533_uninit_cec(adv7511); 1044 err_i2c_unregister_edid: 1045 i2c_unregister_device(adv7511->i2c_edid); 1046 1047 return ret; 1048 } 1049 1050 static int adv7511_remove(struct i2c_client *i2c) 1051 { 1052 struct adv7511 *adv7511 = i2c_get_clientdata(i2c); 1053 1054 if (adv7511->type == ADV7533) { 1055 adv7533_detach_dsi(adv7511); 1056 adv7533_uninit_cec(adv7511); 1057 } 1058 1059 drm_bridge_remove(&adv7511->bridge); 1060 1061 i2c_unregister_device(adv7511->i2c_edid); 1062 1063 kfree(adv7511->edid); 1064 1065 return 0; 1066 } 1067 1068 static const struct i2c_device_id adv7511_i2c_ids[] = { 1069 { "adv7511", ADV7511 }, 1070 { "adv7511w", ADV7511 }, 1071 { "adv7513", ADV7511 }, 1072 #ifdef CONFIG_DRM_I2C_ADV7533 1073 { "adv7533", ADV7533 }, 1074 #endif 1075 { } 1076 }; 1077 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids); 1078 1079 static const struct of_device_id adv7511_of_ids[] = { 1080 { .compatible = "adi,adv7511", .data = (void *)ADV7511 }, 1081 { .compatible = "adi,adv7511w", .data = (void *)ADV7511 }, 1082 { .compatible = "adi,adv7513", .data = (void *)ADV7511 }, 1083 #ifdef CONFIG_DRM_I2C_ADV7533 1084 { .compatible = "adi,adv7533", .data = (void *)ADV7533 }, 1085 #endif 1086 { } 1087 }; 1088 MODULE_DEVICE_TABLE(of, adv7511_of_ids); 1089 1090 static struct mipi_dsi_driver adv7533_dsi_driver = { 1091 .driver.name = "adv7533", 1092 }; 1093 1094 static struct i2c_driver adv7511_driver = { 1095 .driver = { 1096 .name = "adv7511", 1097 .of_match_table = adv7511_of_ids, 1098 }, 1099 .id_table = adv7511_i2c_ids, 1100 .probe = adv7511_probe, 1101 .remove = adv7511_remove, 1102 }; 1103 1104 static int __init adv7511_init(void) 1105 { 1106 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) 1107 mipi_dsi_driver_register(&adv7533_dsi_driver); 1108 1109 return i2c_add_driver(&adv7511_driver); 1110 } 1111 module_init(adv7511_init); 1112 1113 static void __exit adv7511_exit(void) 1114 { 1115 i2c_del_driver(&adv7511_driver); 1116 1117 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) 1118 mipi_dsi_driver_unregister(&adv7533_dsi_driver); 1119 } 1120 module_exit(adv7511_exit); 1121 1122 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 1123 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver"); 1124 MODULE_LICENSE("GPL"); 1125