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/gpio/machine.h> 29 #include <linux/mfd/intel_soc_pmic.h> 30 #include <linux/pinctrl/consumer.h> 31 #include <linux/pinctrl/machine.h> 32 #include <linux/slab.h> 33 #include <linux/string_helpers.h> 34 35 #include <asm/unaligned.h> 36 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 40 #include <video/mipi_display.h> 41 42 #include "i915_drv.h" 43 #include "i915_reg.h" 44 #include "intel_de.h" 45 #include "intel_display_types.h" 46 #include "intel_dsi.h" 47 #include "intel_dsi_vbt.h" 48 #include "intel_gmbus_regs.h" 49 #include "intel_pps_regs.h" 50 #include "vlv_dsi.h" 51 #include "vlv_dsi_regs.h" 52 #include "vlv_sideband.h" 53 54 #define MIPI_TRANSFER_MODE_SHIFT 0 55 #define MIPI_VIRTUAL_CHANNEL_SHIFT 1 56 #define MIPI_PORT_SHIFT 3 57 58 /* base offsets for gpio pads */ 59 #define VLV_GPIO_NC_0_HV_DDI0_HPD 0x4130 60 #define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120 61 #define VLV_GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110 62 #define VLV_GPIO_NC_3_PANEL0_VDDEN 0x4140 63 #define VLV_GPIO_NC_4_PANEL0_BKLTEN 0x4150 64 #define VLV_GPIO_NC_5_PANEL0_BKLTCTL 0x4160 65 #define VLV_GPIO_NC_6_HV_DDI1_HPD 0x4180 66 #define VLV_GPIO_NC_7_HV_DDI1_DDC_SDA 0x4190 67 #define VLV_GPIO_NC_8_HV_DDI1_DDC_SCL 0x4170 68 #define VLV_GPIO_NC_9_PANEL1_VDDEN 0x4100 69 #define VLV_GPIO_NC_10_PANEL1_BKLTEN 0x40E0 70 #define VLV_GPIO_NC_11_PANEL1_BKLTCTL 0x40F0 71 72 #define VLV_GPIO_PCONF0(base_offset) (base_offset) 73 #define VLV_GPIO_PAD_VAL(base_offset) ((base_offset) + 8) 74 75 struct gpio_map { 76 u16 base_offset; 77 bool init; 78 }; 79 80 static struct gpio_map vlv_gpio_table[] = { 81 { VLV_GPIO_NC_0_HV_DDI0_HPD }, 82 { VLV_GPIO_NC_1_HV_DDI0_DDC_SDA }, 83 { VLV_GPIO_NC_2_HV_DDI0_DDC_SCL }, 84 { VLV_GPIO_NC_3_PANEL0_VDDEN }, 85 { VLV_GPIO_NC_4_PANEL0_BKLTEN }, 86 { VLV_GPIO_NC_5_PANEL0_BKLTCTL }, 87 { VLV_GPIO_NC_6_HV_DDI1_HPD }, 88 { VLV_GPIO_NC_7_HV_DDI1_DDC_SDA }, 89 { VLV_GPIO_NC_8_HV_DDI1_DDC_SCL }, 90 { VLV_GPIO_NC_9_PANEL1_VDDEN }, 91 { VLV_GPIO_NC_10_PANEL1_BKLTEN }, 92 { VLV_GPIO_NC_11_PANEL1_BKLTCTL }, 93 }; 94 95 struct i2c_adapter_lookup { 96 u16 slave_addr; 97 struct intel_dsi *intel_dsi; 98 acpi_handle dev_handle; 99 }; 100 101 #define CHV_GPIO_IDX_START_N 0 102 #define CHV_GPIO_IDX_START_E 73 103 #define CHV_GPIO_IDX_START_SW 100 104 #define CHV_GPIO_IDX_START_SE 198 105 106 #define CHV_VBT_MAX_PINS_PER_FMLY 15 107 108 #define CHV_GPIO_PAD_CFG0(f, i) (0x4400 + (f) * 0x400 + (i) * 8) 109 #define CHV_GPIO_GPIOEN (1 << 15) 110 #define CHV_GPIO_GPIOCFG_GPIO (0 << 8) 111 #define CHV_GPIO_GPIOCFG_GPO (1 << 8) 112 #define CHV_GPIO_GPIOCFG_GPI (2 << 8) 113 #define CHV_GPIO_GPIOCFG_HIZ (3 << 8) 114 #define CHV_GPIO_GPIOTXSTATE(state) ((!!(state)) << 1) 115 116 #define CHV_GPIO_PAD_CFG1(f, i) (0x4400 + (f) * 0x400 + (i) * 8 + 4) 117 #define CHV_GPIO_CFGLOCK (1 << 31) 118 119 /* ICL DSI Display GPIO Pins */ 120 #define ICL_GPIO_DDSP_HPD_A 0 121 #define ICL_GPIO_L_VDDEN_1 1 122 #define ICL_GPIO_L_BKLTEN_1 2 123 #define ICL_GPIO_DDPA_CTRLCLK_1 3 124 #define ICL_GPIO_DDPA_CTRLDATA_1 4 125 #define ICL_GPIO_DDSP_HPD_B 5 126 #define ICL_GPIO_L_VDDEN_2 6 127 #define ICL_GPIO_L_BKLTEN_2 7 128 #define ICL_GPIO_DDPA_CTRLCLK_2 8 129 #define ICL_GPIO_DDPA_CTRLDATA_2 9 130 131 static enum port intel_dsi_seq_port_to_port(struct intel_dsi *intel_dsi, 132 u8 seq_port) 133 { 134 /* 135 * If single link DSI is being used on any port, the VBT sequence block 136 * send packet apparently always has 0 for the port. Just use the port 137 * we have configured, and ignore the sequence block port. 138 */ 139 if (hweight8(intel_dsi->ports) == 1) 140 return ffs(intel_dsi->ports) - 1; 141 142 if (seq_port) { 143 if (intel_dsi->ports & BIT(PORT_B)) 144 return PORT_B; 145 else if (intel_dsi->ports & BIT(PORT_C)) 146 return PORT_C; 147 } 148 149 return PORT_A; 150 } 151 152 static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, 153 const u8 *data) 154 { 155 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); 156 struct mipi_dsi_device *dsi_device; 157 u8 type, flags, seq_port; 158 u16 len; 159 enum port port; 160 161 drm_dbg_kms(&dev_priv->drm, "\n"); 162 163 flags = *data++; 164 type = *data++; 165 166 len = *((u16 *) data); 167 data += 2; 168 169 seq_port = (flags >> MIPI_PORT_SHIFT) & 3; 170 171 port = intel_dsi_seq_port_to_port(intel_dsi, seq_port); 172 173 if (drm_WARN_ON(&dev_priv->drm, !intel_dsi->dsi_hosts[port])) 174 goto out; 175 176 dsi_device = intel_dsi->dsi_hosts[port]->device; 177 if (!dsi_device) { 178 drm_dbg_kms(&dev_priv->drm, "no dsi device for port %c\n", 179 port_name(port)); 180 goto out; 181 } 182 183 if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1) 184 dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM; 185 else 186 dsi_device->mode_flags |= MIPI_DSI_MODE_LPM; 187 188 dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3; 189 190 switch (type) { 191 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: 192 mipi_dsi_generic_write(dsi_device, NULL, 0); 193 break; 194 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: 195 mipi_dsi_generic_write(dsi_device, data, 1); 196 break; 197 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: 198 mipi_dsi_generic_write(dsi_device, data, 2); 199 break; 200 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: 201 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: 202 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: 203 drm_dbg(&dev_priv->drm, 204 "Generic Read not yet implemented or used\n"); 205 break; 206 case MIPI_DSI_GENERIC_LONG_WRITE: 207 mipi_dsi_generic_write(dsi_device, data, len); 208 break; 209 case MIPI_DSI_DCS_SHORT_WRITE: 210 mipi_dsi_dcs_write_buffer(dsi_device, data, 1); 211 break; 212 case MIPI_DSI_DCS_SHORT_WRITE_PARAM: 213 mipi_dsi_dcs_write_buffer(dsi_device, data, 2); 214 break; 215 case MIPI_DSI_DCS_READ: 216 drm_dbg(&dev_priv->drm, 217 "DCS Read not yet implemented or used\n"); 218 break; 219 case MIPI_DSI_DCS_LONG_WRITE: 220 mipi_dsi_dcs_write_buffer(dsi_device, data, len); 221 break; 222 } 223 224 if (DISPLAY_VER(dev_priv) < 11) 225 vlv_dsi_wait_for_fifo_empty(intel_dsi, port); 226 227 out: 228 data += len; 229 230 return data; 231 } 232 233 static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data) 234 { 235 struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev); 236 u32 delay = *((const u32 *) data); 237 238 drm_dbg_kms(&i915->drm, "\n"); 239 240 usleep_range(delay, delay + 10); 241 data += 4; 242 243 return data; 244 } 245 246 static void vlv_exec_gpio(struct intel_connector *connector, 247 u8 gpio_source, u8 gpio_index, bool value) 248 { 249 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 250 struct gpio_map *map; 251 u16 pconf0, padval; 252 u32 tmp; 253 u8 port; 254 255 if (gpio_index >= ARRAY_SIZE(vlv_gpio_table)) { 256 drm_dbg_kms(&dev_priv->drm, "unknown gpio index %u\n", 257 gpio_index); 258 return; 259 } 260 261 map = &vlv_gpio_table[gpio_index]; 262 263 if (connector->panel.vbt.dsi.seq_version >= 3) { 264 /* XXX: this assumes vlv_gpio_table only has NC GPIOs. */ 265 port = IOSF_PORT_GPIO_NC; 266 } else { 267 if (gpio_source == 0) { 268 port = IOSF_PORT_GPIO_NC; 269 } else if (gpio_source == 1) { 270 drm_dbg_kms(&dev_priv->drm, "SC gpio not supported\n"); 271 return; 272 } else { 273 drm_dbg_kms(&dev_priv->drm, 274 "unknown gpio source %u\n", gpio_source); 275 return; 276 } 277 } 278 279 pconf0 = VLV_GPIO_PCONF0(map->base_offset); 280 padval = VLV_GPIO_PAD_VAL(map->base_offset); 281 282 vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 283 if (!map->init) { 284 /* FIXME: remove constant below */ 285 vlv_iosf_sb_write(dev_priv, port, pconf0, 0x2000CC00); 286 map->init = true; 287 } 288 289 tmp = 0x4 | value; 290 vlv_iosf_sb_write(dev_priv, port, padval, tmp); 291 vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 292 } 293 294 static void chv_exec_gpio(struct intel_connector *connector, 295 u8 gpio_source, u8 gpio_index, bool value) 296 { 297 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 298 u16 cfg0, cfg1; 299 u16 family_num; 300 u8 port; 301 302 if (connector->panel.vbt.dsi.seq_version >= 3) { 303 if (gpio_index >= CHV_GPIO_IDX_START_SE) { 304 /* XXX: it's unclear whether 255->57 is part of SE. */ 305 gpio_index -= CHV_GPIO_IDX_START_SE; 306 port = CHV_IOSF_PORT_GPIO_SE; 307 } else if (gpio_index >= CHV_GPIO_IDX_START_SW) { 308 gpio_index -= CHV_GPIO_IDX_START_SW; 309 port = CHV_IOSF_PORT_GPIO_SW; 310 } else if (gpio_index >= CHV_GPIO_IDX_START_E) { 311 gpio_index -= CHV_GPIO_IDX_START_E; 312 port = CHV_IOSF_PORT_GPIO_E; 313 } else { 314 port = CHV_IOSF_PORT_GPIO_N; 315 } 316 } else { 317 /* XXX: The spec is unclear about CHV GPIO on seq v2 */ 318 if (gpio_source != 0) { 319 drm_dbg_kms(&dev_priv->drm, 320 "unknown gpio source %u\n", gpio_source); 321 return; 322 } 323 324 if (gpio_index >= CHV_GPIO_IDX_START_E) { 325 drm_dbg_kms(&dev_priv->drm, 326 "invalid gpio index %u for GPIO N\n", 327 gpio_index); 328 return; 329 } 330 331 port = CHV_IOSF_PORT_GPIO_N; 332 } 333 334 family_num = gpio_index / CHV_VBT_MAX_PINS_PER_FMLY; 335 gpio_index = gpio_index % CHV_VBT_MAX_PINS_PER_FMLY; 336 337 cfg0 = CHV_GPIO_PAD_CFG0(family_num, gpio_index); 338 cfg1 = CHV_GPIO_PAD_CFG1(family_num, gpio_index); 339 340 vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 341 vlv_iosf_sb_write(dev_priv, port, cfg1, 0); 342 vlv_iosf_sb_write(dev_priv, port, cfg0, 343 CHV_GPIO_GPIOEN | CHV_GPIO_GPIOCFG_GPO | 344 CHV_GPIO_GPIOTXSTATE(value)); 345 vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO)); 346 } 347 348 static void bxt_exec_gpio(struct intel_connector *connector, 349 u8 gpio_source, u8 gpio_index, bool value) 350 { 351 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 352 /* XXX: this table is a quick ugly hack. */ 353 static struct gpio_desc *bxt_gpio_table[U8_MAX + 1]; 354 struct gpio_desc *gpio_desc = bxt_gpio_table[gpio_index]; 355 356 if (!gpio_desc) { 357 gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev, 358 NULL, gpio_index, 359 value ? GPIOD_OUT_LOW : 360 GPIOD_OUT_HIGH); 361 362 if (IS_ERR_OR_NULL(gpio_desc)) { 363 drm_err(&dev_priv->drm, 364 "GPIO index %u request failed (%ld)\n", 365 gpio_index, PTR_ERR(gpio_desc)); 366 return; 367 } 368 369 bxt_gpio_table[gpio_index] = gpio_desc; 370 } 371 372 gpiod_set_value(gpio_desc, value); 373 } 374 375 static void icl_exec_gpio(struct intel_connector *connector, 376 u8 gpio_source, u8 gpio_index, bool value) 377 { 378 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 379 380 drm_dbg_kms(&dev_priv->drm, "Skipping ICL GPIO element execution\n"); 381 } 382 383 enum { 384 MIPI_RESET_1 = 0, 385 MIPI_AVDD_EN_1, 386 MIPI_BKLT_EN_1, 387 MIPI_AVEE_EN_1, 388 MIPI_VIO_EN_1, 389 MIPI_RESET_2, 390 MIPI_AVDD_EN_2, 391 MIPI_BKLT_EN_2, 392 MIPI_AVEE_EN_2, 393 MIPI_VIO_EN_2, 394 }; 395 396 static void icl_native_gpio_set_value(struct drm_i915_private *dev_priv, 397 int gpio, bool value) 398 { 399 int index; 400 401 if (drm_WARN_ON(&dev_priv->drm, DISPLAY_VER(dev_priv) == 11 && gpio >= MIPI_RESET_2)) 402 return; 403 404 switch (gpio) { 405 case MIPI_RESET_1: 406 case MIPI_RESET_2: 407 index = gpio == MIPI_RESET_1 ? HPD_PORT_A : HPD_PORT_B; 408 409 /* 410 * Disable HPD to set the pin to output, and set output 411 * value. The HPD pin should not be enabled for DSI anyway, 412 * assuming the board design and VBT are sane, and the pin isn't 413 * used by a non-DSI encoder. 414 * 415 * The locking protects against concurrent SHOTPLUG_CTL_DDI 416 * modifications in irq setup and handling. 417 */ 418 spin_lock_irq(&dev_priv->irq_lock); 419 intel_de_rmw(dev_priv, SHOTPLUG_CTL_DDI, 420 SHOTPLUG_CTL_DDI_HPD_ENABLE(index) | 421 SHOTPLUG_CTL_DDI_HPD_OUTPUT_DATA(index), 422 value ? SHOTPLUG_CTL_DDI_HPD_OUTPUT_DATA(index) : 0); 423 spin_unlock_irq(&dev_priv->irq_lock); 424 break; 425 case MIPI_AVDD_EN_1: 426 case MIPI_AVDD_EN_2: 427 index = gpio == MIPI_AVDD_EN_1 ? 0 : 1; 428 429 intel_de_rmw(dev_priv, PP_CONTROL(index), PANEL_POWER_ON, 430 value ? PANEL_POWER_ON : 0); 431 break; 432 case MIPI_BKLT_EN_1: 433 case MIPI_BKLT_EN_2: 434 index = gpio == MIPI_BKLT_EN_1 ? 0 : 1; 435 436 intel_de_rmw(dev_priv, PP_CONTROL(index), EDP_BLC_ENABLE, 437 value ? EDP_BLC_ENABLE : 0); 438 break; 439 case MIPI_AVEE_EN_1: 440 case MIPI_AVEE_EN_2: 441 index = gpio == MIPI_AVEE_EN_1 ? 1 : 2; 442 443 intel_de_rmw(dev_priv, GPIO(dev_priv, index), 444 GPIO_CLOCK_VAL_OUT, 445 GPIO_CLOCK_DIR_MASK | GPIO_CLOCK_DIR_OUT | 446 GPIO_CLOCK_VAL_MASK | (value ? GPIO_CLOCK_VAL_OUT : 0)); 447 break; 448 case MIPI_VIO_EN_1: 449 case MIPI_VIO_EN_2: 450 index = gpio == MIPI_VIO_EN_1 ? 1 : 2; 451 452 intel_de_rmw(dev_priv, GPIO(dev_priv, index), 453 GPIO_DATA_VAL_OUT, 454 GPIO_DATA_DIR_MASK | GPIO_DATA_DIR_OUT | 455 GPIO_DATA_VAL_MASK | (value ? GPIO_DATA_VAL_OUT : 0)); 456 break; 457 default: 458 MISSING_CASE(gpio); 459 } 460 } 461 462 static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) 463 { 464 struct drm_device *dev = intel_dsi->base.base.dev; 465 struct drm_i915_private *dev_priv = to_i915(dev); 466 struct intel_connector *connector = intel_dsi->attached_connector; 467 u8 gpio_source, gpio_index = 0, gpio_number; 468 bool value; 469 bool native = DISPLAY_VER(dev_priv) >= 11; 470 471 if (connector->panel.vbt.dsi.seq_version >= 3) 472 gpio_index = *data++; 473 474 gpio_number = *data++; 475 476 /* gpio source in sequence v2 only */ 477 if (connector->panel.vbt.dsi.seq_version == 2) 478 gpio_source = (*data >> 1) & 3; 479 else 480 gpio_source = 0; 481 482 if (connector->panel.vbt.dsi.seq_version >= 4 && *data & BIT(1)) 483 native = false; 484 485 /* pull up/down */ 486 value = *data++ & 1; 487 488 drm_dbg_kms(&dev_priv->drm, "GPIO index %u, number %u, source %u, native %s, set to %s\n", 489 gpio_index, gpio_number, gpio_source, str_yes_no(native), str_on_off(value)); 490 491 if (native) 492 icl_native_gpio_set_value(dev_priv, gpio_number, value); 493 else if (DISPLAY_VER(dev_priv) >= 11) 494 icl_exec_gpio(connector, gpio_source, gpio_index, value); 495 else if (IS_VALLEYVIEW(dev_priv)) 496 vlv_exec_gpio(connector, gpio_source, gpio_number, value); 497 else if (IS_CHERRYVIEW(dev_priv)) 498 chv_exec_gpio(connector, gpio_source, gpio_number, value); 499 else 500 bxt_exec_gpio(connector, gpio_source, gpio_index, value); 501 502 return data; 503 } 504 505 #ifdef CONFIG_ACPI 506 static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) 507 { 508 struct i2c_adapter_lookup *lookup = data; 509 struct intel_dsi *intel_dsi = lookup->intel_dsi; 510 struct acpi_resource_i2c_serialbus *sb; 511 struct i2c_adapter *adapter; 512 acpi_handle adapter_handle; 513 acpi_status status; 514 515 if (!i2c_acpi_get_i2c_resource(ares, &sb)) 516 return 1; 517 518 if (lookup->slave_addr != sb->slave_address) 519 return 1; 520 521 status = acpi_get_handle(lookup->dev_handle, 522 sb->resource_source.string_ptr, 523 &adapter_handle); 524 if (ACPI_FAILURE(status)) 525 return 1; 526 527 adapter = i2c_acpi_find_adapter_by_handle(adapter_handle); 528 if (adapter) 529 intel_dsi->i2c_bus_num = adapter->nr; 530 531 return 1; 532 } 533 534 static void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, 535 const u16 slave_addr) 536 { 537 struct drm_device *drm_dev = intel_dsi->base.base.dev; 538 struct acpi_device *adev = ACPI_COMPANION(drm_dev->dev); 539 struct i2c_adapter_lookup lookup = { 540 .slave_addr = slave_addr, 541 .intel_dsi = intel_dsi, 542 .dev_handle = acpi_device_handle(adev), 543 }; 544 LIST_HEAD(resource_list); 545 546 acpi_dev_get_resources(adev, &resource_list, i2c_adapter_lookup, &lookup); 547 acpi_dev_free_resource_list(&resource_list); 548 } 549 #else 550 static inline void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, 551 const u16 slave_addr) 552 { 553 } 554 #endif 555 556 static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) 557 { 558 struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev); 559 struct i2c_adapter *adapter; 560 struct i2c_msg msg; 561 int ret; 562 u8 vbt_i2c_bus_num = *(data + 2); 563 u16 slave_addr = *(u16 *)(data + 3); 564 u8 reg_offset = *(data + 5); 565 u8 payload_size = *(data + 6); 566 u8 *payload_data; 567 568 if (intel_dsi->i2c_bus_num < 0) { 569 intel_dsi->i2c_bus_num = vbt_i2c_bus_num; 570 i2c_acpi_find_adapter(intel_dsi, slave_addr); 571 } 572 573 adapter = i2c_get_adapter(intel_dsi->i2c_bus_num); 574 if (!adapter) { 575 drm_err(&i915->drm, "Cannot find a valid i2c bus for xfer\n"); 576 goto err_bus; 577 } 578 579 payload_data = kzalloc(payload_size + 1, GFP_KERNEL); 580 if (!payload_data) 581 goto err_alloc; 582 583 payload_data[0] = reg_offset; 584 memcpy(&payload_data[1], (data + 7), payload_size); 585 586 msg.addr = slave_addr; 587 msg.flags = 0; 588 msg.len = payload_size + 1; 589 msg.buf = payload_data; 590 591 ret = i2c_transfer(adapter, &msg, 1); 592 if (ret < 0) 593 drm_err(&i915->drm, 594 "Failed to xfer payload of size (%u) to reg (%u)\n", 595 payload_size, reg_offset); 596 597 kfree(payload_data); 598 err_alloc: 599 i2c_put_adapter(adapter); 600 err_bus: 601 return data + payload_size + 7; 602 } 603 604 static const u8 *mipi_exec_spi(struct intel_dsi *intel_dsi, const u8 *data) 605 { 606 struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev); 607 608 drm_dbg_kms(&i915->drm, "Skipping SPI element execution\n"); 609 610 return data + *(data + 5) + 6; 611 } 612 613 static const u8 *mipi_exec_pmic(struct intel_dsi *intel_dsi, const u8 *data) 614 { 615 struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev); 616 #ifdef CONFIG_PMIC_OPREGION 617 u32 value, mask, reg_address; 618 u16 i2c_address; 619 int ret; 620 621 /* byte 0 aka PMIC Flag is reserved */ 622 i2c_address = get_unaligned_le16(data + 1); 623 reg_address = get_unaligned_le32(data + 3); 624 value = get_unaligned_le32(data + 7); 625 mask = get_unaligned_le32(data + 11); 626 627 ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_address, 628 reg_address, 629 value, mask); 630 if (ret) 631 drm_err(&i915->drm, "%s failed, error: %d\n", __func__, ret); 632 #else 633 drm_err(&i915->drm, 634 "Your hardware requires CONFIG_PMIC_OPREGION and it is not set\n"); 635 #endif 636 637 return data + 15; 638 } 639 640 typedef const u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, 641 const u8 *data); 642 static const fn_mipi_elem_exec exec_elem[] = { 643 [MIPI_SEQ_ELEM_SEND_PKT] = mipi_exec_send_packet, 644 [MIPI_SEQ_ELEM_DELAY] = mipi_exec_delay, 645 [MIPI_SEQ_ELEM_GPIO] = mipi_exec_gpio, 646 [MIPI_SEQ_ELEM_I2C] = mipi_exec_i2c, 647 [MIPI_SEQ_ELEM_SPI] = mipi_exec_spi, 648 [MIPI_SEQ_ELEM_PMIC] = mipi_exec_pmic, 649 }; 650 651 /* 652 * MIPI Sequence from VBT #53 parsing logic 653 * We have already separated each seqence during bios parsing 654 * Following is generic execution function for any sequence 655 */ 656 657 static const char * const seq_name[] = { 658 [MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET", 659 [MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP", 660 [MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON", 661 [MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF", 662 [MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET", 663 [MIPI_SEQ_BACKLIGHT_ON] = "MIPI_SEQ_BACKLIGHT_ON", 664 [MIPI_SEQ_BACKLIGHT_OFF] = "MIPI_SEQ_BACKLIGHT_OFF", 665 [MIPI_SEQ_TEAR_ON] = "MIPI_SEQ_TEAR_ON", 666 [MIPI_SEQ_TEAR_OFF] = "MIPI_SEQ_TEAR_OFF", 667 [MIPI_SEQ_POWER_ON] = "MIPI_SEQ_POWER_ON", 668 [MIPI_SEQ_POWER_OFF] = "MIPI_SEQ_POWER_OFF", 669 }; 670 671 static const char *sequence_name(enum mipi_seq seq_id) 672 { 673 if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id]) 674 return seq_name[seq_id]; 675 else 676 return "(unknown)"; 677 } 678 679 static void intel_dsi_vbt_exec(struct intel_dsi *intel_dsi, 680 enum mipi_seq seq_id) 681 { 682 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); 683 struct intel_connector *connector = intel_dsi->attached_connector; 684 const u8 *data; 685 fn_mipi_elem_exec mipi_elem_exec; 686 687 if (drm_WARN_ON(&dev_priv->drm, 688 seq_id >= ARRAY_SIZE(connector->panel.vbt.dsi.sequence))) 689 return; 690 691 data = connector->panel.vbt.dsi.sequence[seq_id]; 692 if (!data) 693 return; 694 695 drm_WARN_ON(&dev_priv->drm, *data != seq_id); 696 697 drm_dbg_kms(&dev_priv->drm, "Starting MIPI sequence %d - %s\n", 698 seq_id, sequence_name(seq_id)); 699 700 /* Skip Sequence Byte. */ 701 data++; 702 703 /* Skip Size of Sequence. */ 704 if (connector->panel.vbt.dsi.seq_version >= 3) 705 data += 4; 706 707 while (1) { 708 u8 operation_byte = *data++; 709 u8 operation_size = 0; 710 711 if (operation_byte == MIPI_SEQ_ELEM_END) 712 break; 713 714 if (operation_byte < ARRAY_SIZE(exec_elem)) 715 mipi_elem_exec = exec_elem[operation_byte]; 716 else 717 mipi_elem_exec = NULL; 718 719 /* Size of Operation. */ 720 if (connector->panel.vbt.dsi.seq_version >= 3) 721 operation_size = *data++; 722 723 if (mipi_elem_exec) { 724 const u8 *next = data + operation_size; 725 726 data = mipi_elem_exec(intel_dsi, data); 727 728 /* Consistency check if we have size. */ 729 if (operation_size && data != next) { 730 drm_err(&dev_priv->drm, 731 "Inconsistent operation size\n"); 732 return; 733 } 734 } else if (operation_size) { 735 /* We have size, skip. */ 736 drm_dbg_kms(&dev_priv->drm, 737 "Unsupported MIPI operation byte %u\n", 738 operation_byte); 739 data += operation_size; 740 } else { 741 /* No size, can't skip without parsing. */ 742 drm_err(&dev_priv->drm, 743 "Unsupported MIPI operation byte %u\n", 744 operation_byte); 745 return; 746 } 747 } 748 } 749 750 void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi, 751 enum mipi_seq seq_id) 752 { 753 if (seq_id == MIPI_SEQ_POWER_ON && intel_dsi->gpio_panel) 754 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1); 755 if (seq_id == MIPI_SEQ_BACKLIGHT_ON && intel_dsi->gpio_backlight) 756 gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 1); 757 758 intel_dsi_vbt_exec(intel_dsi, seq_id); 759 760 if (seq_id == MIPI_SEQ_POWER_OFF && intel_dsi->gpio_panel) 761 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0); 762 if (seq_id == MIPI_SEQ_BACKLIGHT_OFF && intel_dsi->gpio_backlight) 763 gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 0); 764 } 765 766 void intel_dsi_log_params(struct intel_dsi *intel_dsi) 767 { 768 struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev); 769 770 drm_dbg_kms(&i915->drm, "Pclk %d\n", intel_dsi->pclk); 771 drm_dbg_kms(&i915->drm, "Pixel overlap %d\n", 772 intel_dsi->pixel_overlap); 773 drm_dbg_kms(&i915->drm, "Lane count %d\n", intel_dsi->lane_count); 774 drm_dbg_kms(&i915->drm, "DPHY param reg 0x%x\n", intel_dsi->dphy_reg); 775 drm_dbg_kms(&i915->drm, "Video mode format %s\n", 776 intel_dsi->video_mode == NON_BURST_SYNC_PULSE ? 777 "non-burst with sync pulse" : 778 intel_dsi->video_mode == NON_BURST_SYNC_EVENTS ? 779 "non-burst with sync events" : 780 intel_dsi->video_mode == BURST_MODE ? 781 "burst" : "<unknown>"); 782 drm_dbg_kms(&i915->drm, "Burst mode ratio %d\n", 783 intel_dsi->burst_mode_ratio); 784 drm_dbg_kms(&i915->drm, "Reset timer %d\n", intel_dsi->rst_timer_val); 785 drm_dbg_kms(&i915->drm, "Eot %s\n", 786 str_enabled_disabled(intel_dsi->eotp_pkt)); 787 drm_dbg_kms(&i915->drm, "Clockstop %s\n", 788 str_enabled_disabled(!intel_dsi->clock_stop)); 789 drm_dbg_kms(&i915->drm, "Mode %s\n", 790 intel_dsi->operation_mode ? "command" : "video"); 791 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) 792 drm_dbg_kms(&i915->drm, 793 "Dual link: DSI_DUAL_LINK_FRONT_BACK\n"); 794 else if (intel_dsi->dual_link == DSI_DUAL_LINK_PIXEL_ALT) 795 drm_dbg_kms(&i915->drm, 796 "Dual link: DSI_DUAL_LINK_PIXEL_ALT\n"); 797 else 798 drm_dbg_kms(&i915->drm, "Dual link: NONE\n"); 799 drm_dbg_kms(&i915->drm, "Pixel Format %d\n", intel_dsi->pixel_format); 800 drm_dbg_kms(&i915->drm, "TLPX %d\n", intel_dsi->escape_clk_div); 801 drm_dbg_kms(&i915->drm, "LP RX Timeout 0x%x\n", 802 intel_dsi->lp_rx_timeout); 803 drm_dbg_kms(&i915->drm, "Turnaround Timeout 0x%x\n", 804 intel_dsi->turn_arnd_val); 805 drm_dbg_kms(&i915->drm, "Init Count 0x%x\n", intel_dsi->init_count); 806 drm_dbg_kms(&i915->drm, "HS to LP Count 0x%x\n", 807 intel_dsi->hs_to_lp_count); 808 drm_dbg_kms(&i915->drm, "LP Byte Clock %d\n", intel_dsi->lp_byte_clk); 809 drm_dbg_kms(&i915->drm, "DBI BW Timer 0x%x\n", intel_dsi->bw_timer); 810 drm_dbg_kms(&i915->drm, "LP to HS Clock Count 0x%x\n", 811 intel_dsi->clk_lp_to_hs_count); 812 drm_dbg_kms(&i915->drm, "HS to LP Clock Count 0x%x\n", 813 intel_dsi->clk_hs_to_lp_count); 814 drm_dbg_kms(&i915->drm, "BTA %s\n", 815 str_enabled_disabled(!(intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA))); 816 } 817 818 bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id) 819 { 820 struct drm_device *dev = intel_dsi->base.base.dev; 821 struct drm_i915_private *dev_priv = to_i915(dev); 822 struct intel_connector *connector = intel_dsi->attached_connector; 823 struct mipi_config *mipi_config = connector->panel.vbt.dsi.config; 824 struct mipi_pps_data *pps = connector->panel.vbt.dsi.pps; 825 struct drm_display_mode *mode = connector->panel.vbt.lfp_lvds_vbt_mode; 826 u16 burst_mode_ratio; 827 enum port port; 828 829 drm_dbg_kms(&dev_priv->drm, "\n"); 830 831 intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1; 832 intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0; 833 intel_dsi->lane_count = mipi_config->lane_cnt + 1; 834 intel_dsi->pixel_format = 835 pixel_format_from_register_bits( 836 mipi_config->videomode_color_format << 7); 837 838 intel_dsi->dual_link = mipi_config->dual_link; 839 intel_dsi->pixel_overlap = mipi_config->pixel_overlap; 840 intel_dsi->operation_mode = mipi_config->is_cmd_mode; 841 intel_dsi->video_mode = mipi_config->video_transfer_mode; 842 intel_dsi->escape_clk_div = mipi_config->byte_clk_sel; 843 intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout; 844 intel_dsi->hs_tx_timeout = mipi_config->hs_tx_timeout; 845 intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout; 846 intel_dsi->rst_timer_val = mipi_config->device_reset_timer; 847 intel_dsi->init_count = mipi_config->master_init_timer; 848 intel_dsi->bw_timer = mipi_config->dbi_bw_timer; 849 intel_dsi->video_frmt_cfg_bits = 850 mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0; 851 intel_dsi->bgr_enabled = mipi_config->rgb_flip; 852 853 /* Starting point, adjusted depending on dual link and burst mode */ 854 intel_dsi->pclk = mode->clock; 855 856 /* In dual link mode each port needs half of pixel clock */ 857 if (intel_dsi->dual_link) { 858 intel_dsi->pclk /= 2; 859 860 /* we can enable pixel_overlap if needed by panel. In this 861 * case we need to increase the pixelclock for extra pixels 862 */ 863 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) { 864 intel_dsi->pclk += DIV_ROUND_UP(mode->vtotal * intel_dsi->pixel_overlap * 60, 1000); 865 } 866 } 867 868 /* Burst Mode Ratio 869 * Target ddr frequency from VBT / non burst ddr freq 870 * multiply by 100 to preserve remainder 871 */ 872 if (intel_dsi->video_mode == BURST_MODE) { 873 if (mipi_config->target_burst_mode_freq) { 874 u32 bitrate = intel_dsi_bitrate(intel_dsi); 875 876 /* 877 * Sometimes the VBT contains a slightly lower clock, 878 * then the bitrate we have calculated, in this case 879 * just replace it with the calculated bitrate. 880 */ 881 if (mipi_config->target_burst_mode_freq < bitrate && 882 intel_fuzzy_clock_check( 883 mipi_config->target_burst_mode_freq, 884 bitrate)) 885 mipi_config->target_burst_mode_freq = bitrate; 886 887 if (mipi_config->target_burst_mode_freq < bitrate) { 888 drm_err(&dev_priv->drm, 889 "Burst mode freq is less than computed\n"); 890 return false; 891 } 892 893 burst_mode_ratio = DIV_ROUND_UP( 894 mipi_config->target_burst_mode_freq * 100, 895 bitrate); 896 897 intel_dsi->pclk = DIV_ROUND_UP(intel_dsi->pclk * burst_mode_ratio, 100); 898 } else { 899 drm_err(&dev_priv->drm, 900 "Burst mode target is not set\n"); 901 return false; 902 } 903 } else 904 burst_mode_ratio = 100; 905 906 intel_dsi->burst_mode_ratio = burst_mode_ratio; 907 908 /* delays in VBT are in unit of 100us, so need to convert 909 * here in ms 910 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */ 911 intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10; 912 intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10; 913 intel_dsi->panel_on_delay = pps->panel_on_delay / 10; 914 intel_dsi->panel_off_delay = pps->panel_off_delay / 10; 915 intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10; 916 917 intel_dsi->i2c_bus_num = -1; 918 919 /* a regular driver would get the device in probe */ 920 for_each_dsi_port(port, intel_dsi->ports) { 921 mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device); 922 } 923 924 return true; 925 } 926 927 /* 928 * On some BYT/CHT devs some sequences are incomplete and we need to manually 929 * control some GPIOs. We need to add a GPIO lookup table before we get these. 930 * If the GOP did not initialize the panel (HDMI inserted) we may need to also 931 * change the pinmux for the SoC's PWM0 pin from GPIO to PWM. 932 */ 933 static struct gpiod_lookup_table pmic_panel_gpio_table = { 934 /* Intel GFX is consumer */ 935 .dev_id = "0000:00:02.0", 936 .table = { 937 /* Panel EN/DISABLE */ 938 GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH), 939 { } 940 }, 941 }; 942 943 static struct gpiod_lookup_table soc_panel_gpio_table = { 944 .dev_id = "0000:00:02.0", 945 .table = { 946 GPIO_LOOKUP("INT33FC:01", 10, "backlight", GPIO_ACTIVE_HIGH), 947 GPIO_LOOKUP("INT33FC:01", 11, "panel", GPIO_ACTIVE_HIGH), 948 { } 949 }, 950 }; 951 952 static const struct pinctrl_map soc_pwm_pinctrl_map[] = { 953 PIN_MAP_MUX_GROUP("0000:00:02.0", "soc_pwm0", "INT33FC:00", 954 "pwm0_grp", "pwm"), 955 }; 956 957 void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on) 958 { 959 struct drm_device *dev = intel_dsi->base.base.dev; 960 struct drm_i915_private *dev_priv = to_i915(dev); 961 struct intel_connector *connector = intel_dsi->attached_connector; 962 struct mipi_config *mipi_config = connector->panel.vbt.dsi.config; 963 enum gpiod_flags flags = panel_is_on ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; 964 bool want_backlight_gpio = false; 965 bool want_panel_gpio = false; 966 struct pinctrl *pinctrl; 967 int ret; 968 969 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && 970 mipi_config->pwm_blc == PPS_BLC_PMIC) { 971 gpiod_add_lookup_table(&pmic_panel_gpio_table); 972 want_panel_gpio = true; 973 } 974 975 if (IS_VALLEYVIEW(dev_priv) && mipi_config->pwm_blc == PPS_BLC_SOC) { 976 gpiod_add_lookup_table(&soc_panel_gpio_table); 977 want_panel_gpio = true; 978 want_backlight_gpio = true; 979 980 /* Ensure PWM0 pin is muxed as PWM instead of GPIO */ 981 ret = pinctrl_register_mappings(soc_pwm_pinctrl_map, 982 ARRAY_SIZE(soc_pwm_pinctrl_map)); 983 if (ret) 984 drm_err(&dev_priv->drm, 985 "Failed to register pwm0 pinmux mapping\n"); 986 987 pinctrl = devm_pinctrl_get_select(dev->dev, "soc_pwm0"); 988 if (IS_ERR(pinctrl)) 989 drm_err(&dev_priv->drm, 990 "Failed to set pinmux to PWM\n"); 991 } 992 993 if (want_panel_gpio) { 994 intel_dsi->gpio_panel = gpiod_get(dev->dev, "panel", flags); 995 if (IS_ERR(intel_dsi->gpio_panel)) { 996 drm_err(&dev_priv->drm, 997 "Failed to own gpio for panel control\n"); 998 intel_dsi->gpio_panel = NULL; 999 } 1000 } 1001 1002 if (want_backlight_gpio) { 1003 intel_dsi->gpio_backlight = 1004 gpiod_get(dev->dev, "backlight", flags); 1005 if (IS_ERR(intel_dsi->gpio_backlight)) { 1006 drm_err(&dev_priv->drm, 1007 "Failed to own gpio for backlight control\n"); 1008 intel_dsi->gpio_backlight = NULL; 1009 } 1010 } 1011 } 1012 1013 void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi) 1014 { 1015 struct drm_device *dev = intel_dsi->base.base.dev; 1016 struct drm_i915_private *dev_priv = to_i915(dev); 1017 struct intel_connector *connector = intel_dsi->attached_connector; 1018 struct mipi_config *mipi_config = connector->panel.vbt.dsi.config; 1019 1020 if (intel_dsi->gpio_panel) { 1021 gpiod_put(intel_dsi->gpio_panel); 1022 intel_dsi->gpio_panel = NULL; 1023 } 1024 1025 if (intel_dsi->gpio_backlight) { 1026 gpiod_put(intel_dsi->gpio_backlight); 1027 intel_dsi->gpio_backlight = NULL; 1028 } 1029 1030 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && 1031 mipi_config->pwm_blc == PPS_BLC_PMIC) 1032 gpiod_remove_lookup_table(&pmic_panel_gpio_table); 1033 1034 if (IS_VALLEYVIEW(dev_priv) && mipi_config->pwm_blc == PPS_BLC_SOC) { 1035 pinctrl_unregister_mappings(soc_pwm_pinctrl_map); 1036 gpiod_remove_lookup_table(&soc_panel_gpio_table); 1037 } 1038 } 1039