1 /* 2 * Copyright © 2014 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Author: Shobhit Kumar <shobhit.kumar@intel.com> 24 * 25 */ 26 27 #include <linux/gpio/consumer.h> 28 #include <linux/mfd/intel_soc_pmic.h> 29 #include <linux/slab.h> 30 31 #include <asm/intel-mid.h> 32 #include <asm/unaligned.h> 33 34 #include <drm/drm_crtc.h> 35 #include <drm/drm_edid.h> 36 #include <drm/i915_drm.h> 37 38 #include <video/mipi_display.h> 39 40 #include "i915_drv.h" 41 #include "intel_display_types.h" 42 #include "intel_dsi.h" 43 #include "intel_sideband.h" 44 45 #define MIPI_TRANSFER_MODE_SHIFT 0 46 #define MIPI_VIRTUAL_CHANNEL_SHIFT 1 47 #define MIPI_PORT_SHIFT 3 48 49 /* base offsets for gpio pads */ 50 #define VLV_GPIO_NC_0_HV_DDI0_HPD 0x4130 51 #define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120 52 #define VLV_GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110 53 #define VLV_GPIO_NC_3_PANEL0_VDDEN 0x4140 54 #define VLV_GPIO_NC_4_PANEL0_BKLTEN 0x4150 55 #define VLV_GPIO_NC_5_PANEL0_BKLTCTL 0x4160 56 #define VLV_GPIO_NC_6_HV_DDI1_HPD 0x4180 57 #define VLV_GPIO_NC_7_HV_DDI1_DDC_SDA 0x4190 58 #define VLV_GPIO_NC_8_HV_DDI1_DDC_SCL 0x4170 59 #define VLV_GPIO_NC_9_PANEL1_VDDEN 0x4100 60 #define VLV_GPIO_NC_10_PANEL1_BKLTEN 0x40E0 61 #define VLV_GPIO_NC_11_PANEL1_BKLTCTL 0x40F0 62 63 #define VLV_GPIO_PCONF0(base_offset) (base_offset) 64 #define VLV_GPIO_PAD_VAL(base_offset) ((base_offset) + 8) 65 66 struct gpio_map { 67 u16 base_offset; 68 bool init; 69 }; 70 71 static struct gpio_map vlv_gpio_table[] = { 72 { VLV_GPIO_NC_0_HV_DDI0_HPD }, 73 { VLV_GPIO_NC_1_HV_DDI0_DDC_SDA }, 74 { VLV_GPIO_NC_2_HV_DDI0_DDC_SCL }, 75 { VLV_GPIO_NC_3_PANEL0_VDDEN }, 76 { VLV_GPIO_NC_4_PANEL0_BKLTEN }, 77 { VLV_GPIO_NC_5_PANEL0_BKLTCTL }, 78 { VLV_GPIO_NC_6_HV_DDI1_HPD }, 79 { VLV_GPIO_NC_7_HV_DDI1_DDC_SDA }, 80 { VLV_GPIO_NC_8_HV_DDI1_DDC_SCL }, 81 { VLV_GPIO_NC_9_PANEL1_VDDEN }, 82 { VLV_GPIO_NC_10_PANEL1_BKLTEN }, 83 { VLV_GPIO_NC_11_PANEL1_BKLTCTL }, 84 }; 85 86 #define CHV_GPIO_IDX_START_N 0 87 #define CHV_GPIO_IDX_START_E 73 88 #define CHV_GPIO_IDX_START_SW 100 89 #define CHV_GPIO_IDX_START_SE 198 90 91 #define CHV_VBT_MAX_PINS_PER_FMLY 15 92 93 #define CHV_GPIO_PAD_CFG0(f, i) (0x4400 + (f) * 0x400 + (i) * 8) 94 #define CHV_GPIO_GPIOEN (1 << 15) 95 #define CHV_GPIO_GPIOCFG_GPIO (0 << 8) 96 #define CHV_GPIO_GPIOCFG_GPO (1 << 8) 97 #define CHV_GPIO_GPIOCFG_GPI (2 << 8) 98 #define CHV_GPIO_GPIOCFG_HIZ (3 << 8) 99 #define CHV_GPIO_GPIOTXSTATE(state) ((!!(state)) << 1) 100 101 #define CHV_GPIO_PAD_CFG1(f, i) (0x4400 + (f) * 0x400 + (i) * 8 + 4) 102 #define CHV_GPIO_CFGLOCK (1 << 31) 103 104 /* ICL DSI Display GPIO Pins */ 105 #define ICL_GPIO_DDSP_HPD_A 0 106 #define ICL_GPIO_L_VDDEN_1 1 107 #define ICL_GPIO_L_BKLTEN_1 2 108 #define ICL_GPIO_DDPA_CTRLCLK_1 3 109 #define ICL_GPIO_DDPA_CTRLDATA_1 4 110 #define ICL_GPIO_DDSP_HPD_B 5 111 #define ICL_GPIO_L_VDDEN_2 6 112 #define ICL_GPIO_L_BKLTEN_2 7 113 #define ICL_GPIO_DDPA_CTRLCLK_2 8 114 #define ICL_GPIO_DDPA_CTRLDATA_2 9 115 116 static inline enum port intel_dsi_seq_port_to_port(u8 port) 117 { 118 return port ? PORT_C : PORT_A; 119 } 120 121 static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, 122 const u8 *data) 123 { 124 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); 125 struct mipi_dsi_device *dsi_device; 126 u8 type, flags, seq_port; 127 u16 len; 128 enum port port; 129 130 DRM_DEBUG_KMS("\n"); 131 132 flags = *data++; 133 type = *data++; 134 135 len = *((u16 *) data); 136 data += 2; 137 138 seq_port = (flags >> MIPI_PORT_SHIFT) & 3; 139 140 /* For DSI single link on Port A & C, the seq_port value which is 141 * parsed from Sequence Block#53 of VBT has been set to 0 142 * Now, read/write of packets for the DSI single link on Port A and 143 * Port C will based on the DVO port from VBT block 2. 144 */ 145 if (intel_dsi->ports == (1 << PORT_C)) 146 port = PORT_C; 147 else 148 port = intel_dsi_seq_port_to_port(seq_port); 149 150 dsi_device = intel_dsi->dsi_hosts[port]->device; 151 if (!dsi_device) { 152 DRM_DEBUG_KMS("no dsi device for port %c\n", port_name(port)); 153 goto out; 154 } 155 156 if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1) 157 dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM; 158 else 159 dsi_device->mode_flags |= MIPI_DSI_MODE_LPM; 160 161 dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3; 162 163 switch (type) { 164 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: 165 mipi_dsi_generic_write(dsi_device, NULL, 0); 166 break; 167 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: 168 mipi_dsi_generic_write(dsi_device, data, 1); 169 break; 170 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: 171 mipi_dsi_generic_write(dsi_device, data, 2); 172 break; 173 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: 174 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: 175 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: 176 DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n"); 177 break; 178 case MIPI_DSI_GENERIC_LONG_WRITE: 179 mipi_dsi_generic_write(dsi_device, data, len); 180 break; 181 case MIPI_DSI_DCS_SHORT_WRITE: 182 mipi_dsi_dcs_write_buffer(dsi_device, data, 1); 183 break; 184 case MIPI_DSI_DCS_SHORT_WRITE_PARAM: 185 mipi_dsi_dcs_write_buffer(dsi_device, data, 2); 186 break; 187 case MIPI_DSI_DCS_READ: 188 DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n"); 189 break; 190 case MIPI_DSI_DCS_LONG_WRITE: 191 mipi_dsi_dcs_write_buffer(dsi_device, data, len); 192 break; 193 } 194 195 if (INTEL_GEN(dev_priv) < 11) 196 vlv_dsi_wait_for_fifo_empty(intel_dsi, port); 197 198 out: 199 data += len; 200 201 return data; 202 } 203 204 static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data) 205 { 206 u32 delay = *((const u32 *) data); 207 208 DRM_DEBUG_KMS("\n"); 209 210 usleep_range(delay, delay + 10); 211 data += 4; 212 213 return data; 214 } 215 216 static void vlv_exec_gpio(struct drm_i915_private *dev_priv, 217 u8 gpio_source, u8 gpio_index, bool value) 218 { 219 struct gpio_map *map; 220 u16 pconf0, padval; 221 u32 tmp; 222 u8 port; 223 224 if (gpio_index >= ARRAY_SIZE(vlv_gpio_table)) { 225 DRM_DEBUG_KMS("unknown gpio index %u\n", gpio_index); 226 return; 227 } 228 229 map = &vlv_gpio_table[gpio_index]; 230 231 if (dev_priv->vbt.dsi.seq_version >= 3) { 232 /* XXX: this assumes vlv_gpio_table only has NC GPIOs. */ 233 port = IOSF_PORT_GPIO_NC; 234 } else { 235 if (gpio_source == 0) { 236 port = IOSF_PORT_GPIO_NC; 237 } else if (gpio_source == 1) { 238 DRM_DEBUG_KMS("SC gpio not supported\n"); 239 return; 240 } else { 241 DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source); 242 return; 243 } 244 } 245 246 pconf0 = VLV_GPIO_PCONF0(map->base_offset); 247 padval = VLV_GPIO_PAD_VAL(map->base_offset); 248 249 vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 250 if (!map->init) { 251 /* FIXME: remove constant below */ 252 vlv_iosf_sb_write(dev_priv, port, pconf0, 0x2000CC00); 253 map->init = true; 254 } 255 256 tmp = 0x4 | value; 257 vlv_iosf_sb_write(dev_priv, port, padval, tmp); 258 vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 259 } 260 261 static void chv_exec_gpio(struct drm_i915_private *dev_priv, 262 u8 gpio_source, u8 gpio_index, bool value) 263 { 264 u16 cfg0, cfg1; 265 u16 family_num; 266 u8 port; 267 268 if (dev_priv->vbt.dsi.seq_version >= 3) { 269 if (gpio_index >= CHV_GPIO_IDX_START_SE) { 270 /* XXX: it's unclear whether 255->57 is part of SE. */ 271 gpio_index -= CHV_GPIO_IDX_START_SE; 272 port = CHV_IOSF_PORT_GPIO_SE; 273 } else if (gpio_index >= CHV_GPIO_IDX_START_SW) { 274 gpio_index -= CHV_GPIO_IDX_START_SW; 275 port = CHV_IOSF_PORT_GPIO_SW; 276 } else if (gpio_index >= CHV_GPIO_IDX_START_E) { 277 gpio_index -= CHV_GPIO_IDX_START_E; 278 port = CHV_IOSF_PORT_GPIO_E; 279 } else { 280 port = CHV_IOSF_PORT_GPIO_N; 281 } 282 } else { 283 /* XXX: The spec is unclear about CHV GPIO on seq v2 */ 284 if (gpio_source != 0) { 285 DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source); 286 return; 287 } 288 289 if (gpio_index >= CHV_GPIO_IDX_START_E) { 290 DRM_DEBUG_KMS("invalid gpio index %u for GPIO N\n", 291 gpio_index); 292 return; 293 } 294 295 port = CHV_IOSF_PORT_GPIO_N; 296 } 297 298 family_num = gpio_index / CHV_VBT_MAX_PINS_PER_FMLY; 299 gpio_index = gpio_index % CHV_VBT_MAX_PINS_PER_FMLY; 300 301 cfg0 = CHV_GPIO_PAD_CFG0(family_num, gpio_index); 302 cfg1 = CHV_GPIO_PAD_CFG1(family_num, gpio_index); 303 304 vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 305 vlv_iosf_sb_write(dev_priv, port, cfg1, 0); 306 vlv_iosf_sb_write(dev_priv, port, cfg0, 307 CHV_GPIO_GPIOEN | CHV_GPIO_GPIOCFG_GPO | 308 CHV_GPIO_GPIOTXSTATE(value)); 309 vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 310 } 311 312 static void bxt_exec_gpio(struct drm_i915_private *dev_priv, 313 u8 gpio_source, u8 gpio_index, bool value) 314 { 315 /* XXX: this table is a quick ugly hack. */ 316 static struct gpio_desc *bxt_gpio_table[U8_MAX + 1]; 317 struct gpio_desc *gpio_desc = bxt_gpio_table[gpio_index]; 318 319 if (!gpio_desc) { 320 gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev, 321 NULL, gpio_index, 322 value ? GPIOD_OUT_LOW : 323 GPIOD_OUT_HIGH); 324 325 if (IS_ERR_OR_NULL(gpio_desc)) { 326 DRM_ERROR("GPIO index %u request failed (%ld)\n", 327 gpio_index, PTR_ERR(gpio_desc)); 328 return; 329 } 330 331 bxt_gpio_table[gpio_index] = gpio_desc; 332 } 333 334 gpiod_set_value(gpio_desc, value); 335 } 336 337 static void icl_exec_gpio(struct drm_i915_private *dev_priv, 338 u8 gpio_source, u8 gpio_index, bool value) 339 { 340 DRM_DEBUG_KMS("Skipping ICL GPIO element execution\n"); 341 } 342 343 static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) 344 { 345 struct drm_device *dev = intel_dsi->base.base.dev; 346 struct drm_i915_private *dev_priv = to_i915(dev); 347 u8 gpio_source, gpio_index = 0, gpio_number; 348 bool value; 349 350 DRM_DEBUG_KMS("\n"); 351 352 if (dev_priv->vbt.dsi.seq_version >= 3) 353 gpio_index = *data++; 354 355 gpio_number = *data++; 356 357 /* gpio source in sequence v2 only */ 358 if (dev_priv->vbt.dsi.seq_version == 2) 359 gpio_source = (*data >> 1) & 3; 360 else 361 gpio_source = 0; 362 363 /* pull up/down */ 364 value = *data++ & 1; 365 366 if (INTEL_GEN(dev_priv) >= 11) 367 icl_exec_gpio(dev_priv, gpio_source, gpio_index, value); 368 else if (IS_VALLEYVIEW(dev_priv)) 369 vlv_exec_gpio(dev_priv, gpio_source, gpio_number, value); 370 else if (IS_CHERRYVIEW(dev_priv)) 371 chv_exec_gpio(dev_priv, gpio_source, gpio_number, value); 372 else 373 bxt_exec_gpio(dev_priv, gpio_source, gpio_index, value); 374 375 return data; 376 } 377 378 static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) 379 { 380 DRM_DEBUG_KMS("Skipping I2C element execution\n"); 381 382 return data + *(data + 6) + 7; 383 } 384 385 static const u8 *mipi_exec_spi(struct intel_dsi *intel_dsi, const u8 *data) 386 { 387 DRM_DEBUG_KMS("Skipping SPI element execution\n"); 388 389 return data + *(data + 5) + 6; 390 } 391 392 static const u8 *mipi_exec_pmic(struct intel_dsi *intel_dsi, const u8 *data) 393 { 394 #ifdef CONFIG_PMIC_OPREGION 395 u32 value, mask, reg_address; 396 u16 i2c_address; 397 int ret; 398 399 /* byte 0 aka PMIC Flag is reserved */ 400 i2c_address = get_unaligned_le16(data + 1); 401 reg_address = get_unaligned_le32(data + 3); 402 value = get_unaligned_le32(data + 7); 403 mask = get_unaligned_le32(data + 11); 404 405 ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_address, 406 reg_address, 407 value, mask); 408 if (ret) 409 DRM_ERROR("%s failed, error: %d\n", __func__, ret); 410 #else 411 DRM_ERROR("Your hardware requires CONFIG_PMIC_OPREGION and it is not set\n"); 412 #endif 413 414 return data + 15; 415 } 416 417 typedef const u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, 418 const u8 *data); 419 static const fn_mipi_elem_exec exec_elem[] = { 420 [MIPI_SEQ_ELEM_SEND_PKT] = mipi_exec_send_packet, 421 [MIPI_SEQ_ELEM_DELAY] = mipi_exec_delay, 422 [MIPI_SEQ_ELEM_GPIO] = mipi_exec_gpio, 423 [MIPI_SEQ_ELEM_I2C] = mipi_exec_i2c, 424 [MIPI_SEQ_ELEM_SPI] = mipi_exec_spi, 425 [MIPI_SEQ_ELEM_PMIC] = mipi_exec_pmic, 426 }; 427 428 /* 429 * MIPI Sequence from VBT #53 parsing logic 430 * We have already separated each seqence during bios parsing 431 * Following is generic execution function for any sequence 432 */ 433 434 static const char * const seq_name[] = { 435 [MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET", 436 [MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP", 437 [MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON", 438 [MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF", 439 [MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET", 440 [MIPI_SEQ_BACKLIGHT_ON] = "MIPI_SEQ_BACKLIGHT_ON", 441 [MIPI_SEQ_BACKLIGHT_OFF] = "MIPI_SEQ_BACKLIGHT_OFF", 442 [MIPI_SEQ_TEAR_ON] = "MIPI_SEQ_TEAR_ON", 443 [MIPI_SEQ_TEAR_OFF] = "MIPI_SEQ_TEAR_OFF", 444 [MIPI_SEQ_POWER_ON] = "MIPI_SEQ_POWER_ON", 445 [MIPI_SEQ_POWER_OFF] = "MIPI_SEQ_POWER_OFF", 446 }; 447 448 static const char *sequence_name(enum mipi_seq seq_id) 449 { 450 if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id]) 451 return seq_name[seq_id]; 452 else 453 return "(unknown)"; 454 } 455 456 void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi, 457 enum mipi_seq seq_id) 458 { 459 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); 460 const u8 *data; 461 fn_mipi_elem_exec mipi_elem_exec; 462 463 if (WARN_ON(seq_id >= ARRAY_SIZE(dev_priv->vbt.dsi.sequence))) 464 return; 465 466 data = dev_priv->vbt.dsi.sequence[seq_id]; 467 if (!data) 468 return; 469 470 WARN_ON(*data != seq_id); 471 472 DRM_DEBUG_KMS("Starting MIPI sequence %d - %s\n", 473 seq_id, sequence_name(seq_id)); 474 475 /* Skip Sequence Byte. */ 476 data++; 477 478 /* Skip Size of Sequence. */ 479 if (dev_priv->vbt.dsi.seq_version >= 3) 480 data += 4; 481 482 while (1) { 483 u8 operation_byte = *data++; 484 u8 operation_size = 0; 485 486 if (operation_byte == MIPI_SEQ_ELEM_END) 487 break; 488 489 if (operation_byte < ARRAY_SIZE(exec_elem)) 490 mipi_elem_exec = exec_elem[operation_byte]; 491 else 492 mipi_elem_exec = NULL; 493 494 /* Size of Operation. */ 495 if (dev_priv->vbt.dsi.seq_version >= 3) 496 operation_size = *data++; 497 498 if (mipi_elem_exec) { 499 const u8 *next = data + operation_size; 500 501 data = mipi_elem_exec(intel_dsi, data); 502 503 /* Consistency check if we have size. */ 504 if (operation_size && data != next) { 505 DRM_ERROR("Inconsistent operation size\n"); 506 return; 507 } 508 } else if (operation_size) { 509 /* We have size, skip. */ 510 DRM_DEBUG_KMS("Unsupported MIPI operation byte %u\n", 511 operation_byte); 512 data += operation_size; 513 } else { 514 /* No size, can't skip without parsing. */ 515 DRM_ERROR("Unsupported MIPI operation byte %u\n", 516 operation_byte); 517 return; 518 } 519 } 520 } 521 522 void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec) 523 { 524 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); 525 526 /* For v3 VBTs in vid-mode the delays are part of the VBT sequences */ 527 if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3) 528 return; 529 530 msleep(msec); 531 } 532 533 void intel_dsi_log_params(struct intel_dsi *intel_dsi) 534 { 535 DRM_DEBUG_KMS("Pclk %d\n", intel_dsi->pclk); 536 DRM_DEBUG_KMS("Pixel overlap %d\n", intel_dsi->pixel_overlap); 537 DRM_DEBUG_KMS("Lane count %d\n", intel_dsi->lane_count); 538 DRM_DEBUG_KMS("DPHY param reg 0x%x\n", intel_dsi->dphy_reg); 539 DRM_DEBUG_KMS("Video mode format %s\n", 540 intel_dsi->video_mode_format == VIDEO_MODE_NON_BURST_WITH_SYNC_PULSE ? 541 "non-burst with sync pulse" : 542 intel_dsi->video_mode_format == VIDEO_MODE_NON_BURST_WITH_SYNC_EVENTS ? 543 "non-burst with sync events" : 544 intel_dsi->video_mode_format == VIDEO_MODE_BURST ? 545 "burst" : "<unknown>"); 546 DRM_DEBUG_KMS("Burst mode ratio %d\n", intel_dsi->burst_mode_ratio); 547 DRM_DEBUG_KMS("Reset timer %d\n", intel_dsi->rst_timer_val); 548 DRM_DEBUG_KMS("Eot %s\n", enableddisabled(intel_dsi->eotp_pkt)); 549 DRM_DEBUG_KMS("Clockstop %s\n", enableddisabled(!intel_dsi->clock_stop)); 550 DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video"); 551 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) 552 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_FRONT_BACK\n"); 553 else if (intel_dsi->dual_link == DSI_DUAL_LINK_PIXEL_ALT) 554 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_PIXEL_ALT\n"); 555 else 556 DRM_DEBUG_KMS("Dual link: NONE\n"); 557 DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format); 558 DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div); 559 DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout); 560 DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val); 561 DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count); 562 DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count); 563 DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk); 564 DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer); 565 DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count); 566 DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count); 567 DRM_DEBUG_KMS("BTA %s\n", 568 enableddisabled(!(intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA))); 569 } 570 571 bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id) 572 { 573 struct drm_device *dev = intel_dsi->base.base.dev; 574 struct drm_i915_private *dev_priv = to_i915(dev); 575 struct mipi_config *mipi_config = dev_priv->vbt.dsi.config; 576 struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps; 577 struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode; 578 u16 burst_mode_ratio; 579 enum port port; 580 581 DRM_DEBUG_KMS("\n"); 582 583 intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1; 584 intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0; 585 intel_dsi->lane_count = mipi_config->lane_cnt + 1; 586 intel_dsi->pixel_format = 587 pixel_format_from_register_bits( 588 mipi_config->videomode_color_format << 7); 589 590 intel_dsi->dual_link = mipi_config->dual_link; 591 intel_dsi->pixel_overlap = mipi_config->pixel_overlap; 592 intel_dsi->operation_mode = mipi_config->is_cmd_mode; 593 intel_dsi->video_mode_format = mipi_config->video_transfer_mode; 594 intel_dsi->escape_clk_div = mipi_config->byte_clk_sel; 595 intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout; 596 intel_dsi->hs_tx_timeout = mipi_config->hs_tx_timeout; 597 intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout; 598 intel_dsi->rst_timer_val = mipi_config->device_reset_timer; 599 intel_dsi->init_count = mipi_config->master_init_timer; 600 intel_dsi->bw_timer = mipi_config->dbi_bw_timer; 601 intel_dsi->video_frmt_cfg_bits = 602 mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0; 603 intel_dsi->bgr_enabled = mipi_config->rgb_flip; 604 605 /* Starting point, adjusted depending on dual link and burst mode */ 606 intel_dsi->pclk = mode->clock; 607 608 /* In dual link mode each port needs half of pixel clock */ 609 if (intel_dsi->dual_link) { 610 intel_dsi->pclk /= 2; 611 612 /* we can enable pixel_overlap if needed by panel. In this 613 * case we need to increase the pixelclock for extra pixels 614 */ 615 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) { 616 intel_dsi->pclk += DIV_ROUND_UP(mode->vtotal * intel_dsi->pixel_overlap * 60, 1000); 617 } 618 } 619 620 /* Burst Mode Ratio 621 * Target ddr frequency from VBT / non burst ddr freq 622 * multiply by 100 to preserve remainder 623 */ 624 if (intel_dsi->video_mode_format == VIDEO_MODE_BURST) { 625 if (mipi_config->target_burst_mode_freq) { 626 u32 bitrate = intel_dsi_bitrate(intel_dsi); 627 628 /* 629 * Sometimes the VBT contains a slightly lower clock, 630 * then the bitrate we have calculated, in this case 631 * just replace it with the calculated bitrate. 632 */ 633 if (mipi_config->target_burst_mode_freq < bitrate && 634 intel_fuzzy_clock_check( 635 mipi_config->target_burst_mode_freq, 636 bitrate)) 637 mipi_config->target_burst_mode_freq = bitrate; 638 639 if (mipi_config->target_burst_mode_freq < bitrate) { 640 DRM_ERROR("Burst mode freq is less than computed\n"); 641 return false; 642 } 643 644 burst_mode_ratio = DIV_ROUND_UP( 645 mipi_config->target_burst_mode_freq * 100, 646 bitrate); 647 648 intel_dsi->pclk = DIV_ROUND_UP(intel_dsi->pclk * burst_mode_ratio, 100); 649 } else { 650 DRM_ERROR("Burst mode target is not set\n"); 651 return false; 652 } 653 } else 654 burst_mode_ratio = 100; 655 656 intel_dsi->burst_mode_ratio = burst_mode_ratio; 657 658 /* delays in VBT are in unit of 100us, so need to convert 659 * here in ms 660 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */ 661 intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10; 662 intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10; 663 intel_dsi->panel_on_delay = pps->panel_on_delay / 10; 664 intel_dsi->panel_off_delay = pps->panel_off_delay / 10; 665 intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10; 666 667 /* a regular driver would get the device in probe */ 668 for_each_dsi_port(port, intel_dsi->ports) { 669 mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device); 670 } 671 672 return true; 673 } 674