1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2020 Linaro Ltd 4 * Author: Sumit Semwal <sumit.semwal@linaro.org> 5 * 6 * This driver is for the DSI interface to panels using the NT36672A display driver IC 7 * from Novatek. 8 * Currently supported are the Tianma FHD+ panels found in some Xiaomi phones, including 9 * some variants of the Poco F1 phone. 10 * 11 * Panels using the Novatek NT37762A IC should add appropriate configuration per-panel and 12 * use this driver. 13 */ 14 15 #include <linux/delay.h> 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/of.h> 19 #include <linux/of_device.h> 20 21 #include <linux/gpio/consumer.h> 22 #include <linux/pinctrl/consumer.h> 23 #include <linux/regulator/consumer.h> 24 25 #include <drm/drm_device.h> 26 #include <drm/drm_mipi_dsi.h> 27 #include <drm/drm_modes.h> 28 #include <drm/drm_panel.h> 29 30 #include <video/mipi_display.h> 31 32 struct nt36672a_panel_cmd { 33 const char data[2]; 34 }; 35 36 static const char * const nt36672a_regulator_names[] = { 37 "vddio", 38 "vddpos", 39 "vddneg", 40 }; 41 42 static unsigned long const nt36672a_regulator_enable_loads[] = { 43 62000, 44 100000, 45 100000 46 }; 47 48 struct nt36672a_panel_desc { 49 const struct drm_display_mode *display_mode; 50 const char *panel_name; 51 52 unsigned int width_mm; 53 unsigned int height_mm; 54 55 unsigned long mode_flags; 56 enum mipi_dsi_pixel_format format; 57 unsigned int lanes; 58 59 unsigned int num_on_cmds_1; 60 const struct nt36672a_panel_cmd *on_cmds_1; 61 unsigned int num_on_cmds_2; 62 const struct nt36672a_panel_cmd *on_cmds_2; 63 64 unsigned int num_off_cmds; 65 const struct nt36672a_panel_cmd *off_cmds; 66 }; 67 68 struct nt36672a_panel { 69 struct drm_panel base; 70 struct mipi_dsi_device *link; 71 const struct nt36672a_panel_desc *desc; 72 73 struct regulator_bulk_data supplies[ARRAY_SIZE(nt36672a_regulator_names)]; 74 75 struct gpio_desc *reset_gpio; 76 77 bool prepared; 78 }; 79 80 static inline struct nt36672a_panel *to_nt36672a_panel(struct drm_panel *panel) 81 { 82 return container_of(panel, struct nt36672a_panel, base); 83 } 84 85 static int nt36672a_send_cmds(struct drm_panel *panel, const struct nt36672a_panel_cmd *cmds, 86 int num) 87 { 88 struct nt36672a_panel *pinfo = to_nt36672a_panel(panel); 89 unsigned int i; 90 int err; 91 92 for (i = 0; i < num; i++) { 93 const struct nt36672a_panel_cmd *cmd = &cmds[i]; 94 95 err = mipi_dsi_dcs_write(pinfo->link, cmd->data[0], cmd->data + 1, 1); 96 97 if (err < 0) 98 return err; 99 } 100 101 return 0; 102 } 103 104 static int nt36672a_panel_power_off(struct drm_panel *panel) 105 { 106 struct nt36672a_panel *pinfo = to_nt36672a_panel(panel); 107 int ret = 0; 108 109 gpiod_set_value(pinfo->reset_gpio, 1); 110 111 ret = regulator_bulk_disable(ARRAY_SIZE(pinfo->supplies), pinfo->supplies); 112 if (ret) 113 dev_err(panel->dev, "regulator_bulk_disable failed %d\n", ret); 114 115 return ret; 116 } 117 118 static int nt36672a_panel_unprepare(struct drm_panel *panel) 119 { 120 struct nt36672a_panel *pinfo = to_nt36672a_panel(panel); 121 int ret; 122 123 if (!pinfo->prepared) 124 return 0; 125 126 /* send off cmds */ 127 ret = nt36672a_send_cmds(panel, pinfo->desc->off_cmds, 128 pinfo->desc->num_off_cmds); 129 130 if (ret < 0) 131 dev_err(panel->dev, "failed to send DCS off cmds: %d\n", ret); 132 133 ret = mipi_dsi_dcs_set_display_off(pinfo->link); 134 if (ret < 0) 135 dev_err(panel->dev, "set_display_off cmd failed ret = %d\n", ret); 136 137 /* 120ms delay required here as per DCS spec */ 138 msleep(120); 139 140 ret = mipi_dsi_dcs_enter_sleep_mode(pinfo->link); 141 if (ret < 0) 142 dev_err(panel->dev, "enter_sleep cmd failed ret = %d\n", ret); 143 144 /* 0x3C = 60ms delay */ 145 msleep(60); 146 147 ret = nt36672a_panel_power_off(panel); 148 if (ret < 0) 149 dev_err(panel->dev, "power_off failed ret = %d\n", ret); 150 151 pinfo->prepared = false; 152 153 return ret; 154 } 155 156 static int nt36672a_panel_power_on(struct nt36672a_panel *pinfo) 157 { 158 int ret; 159 160 ret = regulator_bulk_enable(ARRAY_SIZE(pinfo->supplies), pinfo->supplies); 161 if (ret < 0) 162 return ret; 163 164 /* 165 * As per downstream kernel, Reset sequence of Tianma FHD panel requires the panel to 166 * be out of reset for 10ms, followed by being held in reset for 10ms. But for Android 167 * AOSP, we needed to bump it upto 200ms otherwise we get white screen sometimes. 168 * FIXME: Try to reduce this 200ms to a lesser value. 169 */ 170 gpiod_set_value(pinfo->reset_gpio, 1); 171 msleep(200); 172 gpiod_set_value(pinfo->reset_gpio, 0); 173 msleep(200); 174 175 return 0; 176 } 177 178 static int nt36672a_panel_prepare(struct drm_panel *panel) 179 { 180 struct nt36672a_panel *pinfo = to_nt36672a_panel(panel); 181 int err; 182 183 if (pinfo->prepared) 184 return 0; 185 186 err = nt36672a_panel_power_on(pinfo); 187 if (err < 0) 188 goto poweroff; 189 190 /* send first part of init cmds */ 191 err = nt36672a_send_cmds(panel, pinfo->desc->on_cmds_1, 192 pinfo->desc->num_on_cmds_1); 193 194 if (err < 0) { 195 dev_err(panel->dev, "failed to send DCS Init 1st Code: %d\n", err); 196 goto poweroff; 197 } 198 199 err = mipi_dsi_dcs_exit_sleep_mode(pinfo->link); 200 if (err < 0) { 201 dev_err(panel->dev, "failed to exit sleep mode: %d\n", err); 202 goto poweroff; 203 } 204 205 /* 0x46 = 70 ms delay */ 206 msleep(70); 207 208 err = mipi_dsi_dcs_set_display_on(pinfo->link); 209 if (err < 0) { 210 dev_err(panel->dev, "failed to Set Display ON: %d\n", err); 211 goto poweroff; 212 } 213 214 /* Send rest of the init cmds */ 215 err = nt36672a_send_cmds(panel, pinfo->desc->on_cmds_2, 216 pinfo->desc->num_on_cmds_2); 217 218 if (err < 0) { 219 dev_err(panel->dev, "failed to send DCS Init 2nd Code: %d\n", err); 220 goto poweroff; 221 } 222 223 msleep(120); 224 225 pinfo->prepared = true; 226 227 return 0; 228 229 poweroff: 230 gpiod_set_value(pinfo->reset_gpio, 0); 231 return err; 232 } 233 234 static int nt36672a_panel_get_modes(struct drm_panel *panel, 235 struct drm_connector *connector) 236 { 237 struct nt36672a_panel *pinfo = to_nt36672a_panel(panel); 238 const struct drm_display_mode *m = pinfo->desc->display_mode; 239 struct drm_display_mode *mode; 240 241 mode = drm_mode_duplicate(connector->dev, m); 242 if (!mode) { 243 dev_err(panel->dev, "failed to add mode %ux%u@%u\n", m->hdisplay, 244 m->vdisplay, drm_mode_vrefresh(m)); 245 return -ENOMEM; 246 } 247 248 connector->display_info.width_mm = pinfo->desc->width_mm; 249 connector->display_info.height_mm = pinfo->desc->height_mm; 250 251 drm_mode_set_name(mode); 252 drm_mode_probed_add(connector, mode); 253 254 return 1; 255 } 256 257 static const struct drm_panel_funcs panel_funcs = { 258 .unprepare = nt36672a_panel_unprepare, 259 .prepare = nt36672a_panel_prepare, 260 .get_modes = nt36672a_panel_get_modes, 261 }; 262 263 static const struct nt36672a_panel_cmd tianma_fhd_video_on_cmds_1[] = { 264 /* skin enhancement mode */ 265 { .data = {0xFF, 0x22} }, 266 { .data = {0x00, 0x40} }, 267 { .data = {0x01, 0xC0} }, 268 { .data = {0x02, 0x40} }, 269 { .data = {0x03, 0x40} }, 270 { .data = {0x04, 0x40} }, 271 { .data = {0x05, 0x40} }, 272 { .data = {0x06, 0x40} }, 273 { .data = {0x07, 0x40} }, 274 { .data = {0x08, 0x40} }, 275 { .data = {0x09, 0x40} }, 276 { .data = {0x0A, 0x40} }, 277 { .data = {0x0B, 0x40} }, 278 { .data = {0x0C, 0x40} }, 279 { .data = {0x0D, 0x40} }, 280 { .data = {0x0E, 0x40} }, 281 { .data = {0x0F, 0x40} }, 282 { .data = {0x10, 0x40} }, 283 { .data = {0x11, 0x50} }, 284 { .data = {0x12, 0x60} }, 285 { .data = {0x13, 0x70} }, 286 { .data = {0x14, 0x58} }, 287 { .data = {0x15, 0x68} }, 288 { .data = {0x16, 0x78} }, 289 { .data = {0x17, 0x77} }, 290 { .data = {0x18, 0x39} }, 291 { .data = {0x19, 0x2D} }, 292 { .data = {0x1A, 0x2E} }, 293 { .data = {0x1B, 0x32} }, 294 { .data = {0x1C, 0x37} }, 295 { .data = {0x1D, 0x3A} }, 296 { .data = {0x1E, 0x40} }, 297 { .data = {0x1F, 0x40} }, 298 { .data = {0x20, 0x40} }, 299 { .data = {0x21, 0x40} }, 300 { .data = {0x22, 0x40} }, 301 { .data = {0x23, 0x40} }, 302 { .data = {0x24, 0x40} }, 303 { .data = {0x25, 0x40} }, 304 { .data = {0x26, 0x40} }, 305 { .data = {0x27, 0x40} }, 306 { .data = {0x28, 0x40} }, 307 { .data = {0x2D, 0x00} }, 308 { .data = {0x2F, 0x40} }, 309 { .data = {0x30, 0x40} }, 310 { .data = {0x31, 0x40} }, 311 { .data = {0x32, 0x40} }, 312 { .data = {0x33, 0x40} }, 313 { .data = {0x34, 0x40} }, 314 { .data = {0x35, 0x40} }, 315 { .data = {0x36, 0x40} }, 316 { .data = {0x37, 0x40} }, 317 { .data = {0x38, 0x40} }, 318 { .data = {0x39, 0x40} }, 319 { .data = {0x3A, 0x40} }, 320 { .data = {0x3B, 0x40} }, 321 { .data = {0x3D, 0x40} }, 322 { .data = {0x3F, 0x40} }, 323 { .data = {0x40, 0x40} }, 324 { .data = {0x41, 0x40} }, 325 { .data = {0x42, 0x40} }, 326 { .data = {0x43, 0x40} }, 327 { .data = {0x44, 0x40} }, 328 { .data = {0x45, 0x40} }, 329 { .data = {0x46, 0x40} }, 330 { .data = {0x47, 0x40} }, 331 { .data = {0x48, 0x40} }, 332 { .data = {0x49, 0x40} }, 333 { .data = {0x4A, 0x40} }, 334 { .data = {0x4B, 0x40} }, 335 { .data = {0x4C, 0x40} }, 336 { .data = {0x4D, 0x40} }, 337 { .data = {0x4E, 0x40} }, 338 { .data = {0x4F, 0x40} }, 339 { .data = {0x50, 0x40} }, 340 { .data = {0x51, 0x40} }, 341 { .data = {0x52, 0x40} }, 342 { .data = {0x53, 0x01} }, 343 { .data = {0x54, 0x01} }, 344 { .data = {0x55, 0xFE} }, 345 { .data = {0x56, 0x77} }, 346 { .data = {0x58, 0xCD} }, 347 { .data = {0x59, 0xD0} }, 348 { .data = {0x5A, 0xD0} }, 349 { .data = {0x5B, 0x50} }, 350 { .data = {0x5C, 0x50} }, 351 { .data = {0x5D, 0x50} }, 352 { .data = {0x5E, 0x50} }, 353 { .data = {0x5F, 0x50} }, 354 { .data = {0x60, 0x50} }, 355 { .data = {0x61, 0x50} }, 356 { .data = {0x62, 0x50} }, 357 { .data = {0x63, 0x50} }, 358 { .data = {0x64, 0x50} }, 359 { .data = {0x65, 0x50} }, 360 { .data = {0x66, 0x50} }, 361 { .data = {0x67, 0x50} }, 362 { .data = {0x68, 0x50} }, 363 { .data = {0x69, 0x50} }, 364 { .data = {0x6A, 0x50} }, 365 { .data = {0x6B, 0x50} }, 366 { .data = {0x6C, 0x50} }, 367 { .data = {0x6D, 0x50} }, 368 { .data = {0x6E, 0x50} }, 369 { .data = {0x6F, 0x50} }, 370 { .data = {0x70, 0x07} }, 371 { .data = {0x71, 0x00} }, 372 { .data = {0x72, 0x00} }, 373 { .data = {0x73, 0x00} }, 374 { .data = {0x74, 0x06} }, 375 { .data = {0x75, 0x0C} }, 376 { .data = {0x76, 0x03} }, 377 { .data = {0x77, 0x09} }, 378 { .data = {0x78, 0x0F} }, 379 { .data = {0x79, 0x68} }, 380 { .data = {0x7A, 0x88} }, 381 { .data = {0x7C, 0x80} }, 382 { .data = {0x7D, 0x80} }, 383 { .data = {0x7E, 0x80} }, 384 { .data = {0x7F, 0x00} }, 385 { .data = {0x80, 0x00} }, 386 { .data = {0x81, 0x00} }, 387 { .data = {0x83, 0x01} }, 388 { .data = {0x84, 0x00} }, 389 { .data = {0x85, 0x80} }, 390 { .data = {0x86, 0x80} }, 391 { .data = {0x87, 0x80} }, 392 { .data = {0x88, 0x40} }, 393 { .data = {0x89, 0x91} }, 394 { .data = {0x8A, 0x98} }, 395 { .data = {0x8B, 0x80} }, 396 { .data = {0x8C, 0x80} }, 397 { .data = {0x8D, 0x80} }, 398 { .data = {0x8E, 0x80} }, 399 { .data = {0x8F, 0x80} }, 400 { .data = {0x90, 0x80} }, 401 { .data = {0x91, 0x80} }, 402 { .data = {0x92, 0x80} }, 403 { .data = {0x93, 0x80} }, 404 { .data = {0x94, 0x80} }, 405 { .data = {0x95, 0x80} }, 406 { .data = {0x96, 0x80} }, 407 { .data = {0x97, 0x80} }, 408 { .data = {0x98, 0x80} }, 409 { .data = {0x99, 0x80} }, 410 { .data = {0x9A, 0x80} }, 411 { .data = {0x9B, 0x80} }, 412 { .data = {0x9C, 0x80} }, 413 { .data = {0x9D, 0x80} }, 414 { .data = {0x9E, 0x80} }, 415 { .data = {0x9F, 0x80} }, 416 { .data = {0xA0, 0x8A} }, 417 { .data = {0xA2, 0x80} }, 418 { .data = {0xA6, 0x80} }, 419 { .data = {0xA7, 0x80} }, 420 { .data = {0xA9, 0x80} }, 421 { .data = {0xAA, 0x80} }, 422 { .data = {0xAB, 0x80} }, 423 { .data = {0xAC, 0x80} }, 424 { .data = {0xAD, 0x80} }, 425 { .data = {0xAE, 0x80} }, 426 { .data = {0xAF, 0x80} }, 427 { .data = {0xB7, 0x76} }, 428 { .data = {0xB8, 0x76} }, 429 { .data = {0xB9, 0x05} }, 430 { .data = {0xBA, 0x0D} }, 431 { .data = {0xBB, 0x14} }, 432 { .data = {0xBC, 0x0F} }, 433 { .data = {0xBD, 0x18} }, 434 { .data = {0xBE, 0x1F} }, 435 { .data = {0xBF, 0x05} }, 436 { .data = {0xC0, 0x0D} }, 437 { .data = {0xC1, 0x14} }, 438 { .data = {0xC2, 0x03} }, 439 { .data = {0xC3, 0x07} }, 440 { .data = {0xC4, 0x0A} }, 441 { .data = {0xC5, 0xA0} }, 442 { .data = {0xC6, 0x55} }, 443 { .data = {0xC7, 0xFF} }, 444 { .data = {0xC8, 0x39} }, 445 { .data = {0xC9, 0x44} }, 446 { .data = {0xCA, 0x12} }, 447 { .data = {0xCD, 0x80} }, 448 { .data = {0xDB, 0x80} }, 449 { .data = {0xDC, 0x80} }, 450 { .data = {0xDD, 0x80} }, 451 { .data = {0xE0, 0x80} }, 452 { .data = {0xE1, 0x80} }, 453 { .data = {0xE2, 0x80} }, 454 { .data = {0xE3, 0x80} }, 455 { .data = {0xE4, 0x80} }, 456 { .data = {0xE5, 0x40} }, 457 { .data = {0xE6, 0x40} }, 458 { .data = {0xE7, 0x40} }, 459 { .data = {0xE8, 0x40} }, 460 { .data = {0xE9, 0x40} }, 461 { .data = {0xEA, 0x40} }, 462 { .data = {0xEB, 0x40} }, 463 { .data = {0xEC, 0x40} }, 464 { .data = {0xED, 0x40} }, 465 { .data = {0xEE, 0x40} }, 466 { .data = {0xEF, 0x40} }, 467 { .data = {0xF0, 0x40} }, 468 { .data = {0xF1, 0x40} }, 469 { .data = {0xF2, 0x40} }, 470 { .data = {0xF3, 0x40} }, 471 { .data = {0xF4, 0x40} }, 472 { .data = {0xF5, 0x40} }, 473 { .data = {0xF6, 0x40} }, 474 { .data = {0xFB, 0x1} }, 475 { .data = {0xFF, 0x23} }, 476 { .data = {0xFB, 0x01} }, 477 /* dimming enable */ 478 { .data = {0x01, 0x84} }, 479 { .data = {0x05, 0x2D} }, 480 { .data = {0x06, 0x00} }, 481 /* resolution 1080*2246 */ 482 { .data = {0x11, 0x01} }, 483 { .data = {0x12, 0x7B} }, 484 { .data = {0x15, 0x6F} }, 485 { .data = {0x16, 0x0B} }, 486 /* UI mode */ 487 { .data = {0x29, 0x0A} }, 488 { .data = {0x30, 0xFF} }, 489 { .data = {0x31, 0xFF} }, 490 { .data = {0x32, 0xFF} }, 491 { .data = {0x33, 0xFF} }, 492 { .data = {0x34, 0xFF} }, 493 { .data = {0x35, 0xFF} }, 494 { .data = {0x36, 0xFF} }, 495 { .data = {0x37, 0xFF} }, 496 { .data = {0x38, 0xFC} }, 497 { .data = {0x39, 0xF8} }, 498 { .data = {0x3A, 0xF4} }, 499 { .data = {0x3B, 0xF1} }, 500 { .data = {0x3D, 0xEE} }, 501 { .data = {0x3F, 0xEB} }, 502 { .data = {0x40, 0xE8} }, 503 { .data = {0x41, 0xE5} }, 504 /* STILL mode */ 505 { .data = {0x2A, 0x13} }, 506 { .data = {0x45, 0xFF} }, 507 { .data = {0x46, 0xFF} }, 508 { .data = {0x47, 0xFF} }, 509 { .data = {0x48, 0xFF} }, 510 { .data = {0x49, 0xFF} }, 511 { .data = {0x4A, 0xFF} }, 512 { .data = {0x4B, 0xFF} }, 513 { .data = {0x4C, 0xFF} }, 514 { .data = {0x4D, 0xED} }, 515 { .data = {0x4E, 0xD5} }, 516 { .data = {0x4F, 0xBF} }, 517 { .data = {0x50, 0xA6} }, 518 { .data = {0x51, 0x96} }, 519 { .data = {0x52, 0x86} }, 520 { .data = {0x53, 0x76} }, 521 { .data = {0x54, 0x66} }, 522 /* MOVING mode */ 523 { .data = {0x2B, 0x0E} }, 524 { .data = {0x58, 0xFF} }, 525 { .data = {0x59, 0xFF} }, 526 { .data = {0x5A, 0xFF} }, 527 { .data = {0x5B, 0xFF} }, 528 { .data = {0x5C, 0xFF} }, 529 { .data = {0x5D, 0xFF} }, 530 { .data = {0x5E, 0xFF} }, 531 { .data = {0x5F, 0xFF} }, 532 { .data = {0x60, 0xF6} }, 533 { .data = {0x61, 0xEA} }, 534 { .data = {0x62, 0xE1} }, 535 { .data = {0x63, 0xD8} }, 536 { .data = {0x64, 0xCE} }, 537 { .data = {0x65, 0xC3} }, 538 { .data = {0x66, 0xBA} }, 539 { .data = {0x67, 0xB3} }, 540 { .data = {0xFF, 0x25} }, 541 { .data = {0xFB, 0x01} }, 542 { .data = {0x05, 0x04} }, 543 { .data = {0xFF, 0x26} }, 544 { .data = {0xFB, 0x01} }, 545 { .data = {0x1C, 0xAF} }, 546 { .data = {0xFF, 0x10} }, 547 { .data = {0xFB, 0x01} }, 548 { .data = {0x51, 0xFF} }, 549 { .data = {0x53, 0x24} }, 550 { .data = {0x55, 0x00} }, 551 }; 552 553 static const struct nt36672a_panel_cmd tianma_fhd_video_on_cmds_2[] = { 554 { .data = {0xFF, 0x24} }, 555 { .data = {0xFB, 0x01} }, 556 { .data = {0xC3, 0x01} }, 557 { .data = {0xC4, 0x54} }, 558 { .data = {0xFF, 0x10} }, 559 }; 560 561 static const struct nt36672a_panel_cmd tianma_fhd_video_off_cmds[] = { 562 { .data = {0xFF, 0x24} }, 563 { .data = {0xFB, 0x01} }, 564 { .data = {0xC3, 0x01} }, 565 { .data = {0xFF, 0x10} }, 566 }; 567 568 static const struct drm_display_mode tianma_fhd_video_panel_default_mode = { 569 .clock = 161331, 570 571 .hdisplay = 1080, 572 .hsync_start = 1080 + 40, 573 .hsync_end = 1080 + 40 + 20, 574 .htotal = 1080 + 40 + 20 + 44, 575 576 .vdisplay = 2246, 577 .vsync_start = 2246 + 15, 578 .vsync_end = 2246 + 15 + 2, 579 .vtotal = 2246 + 15 + 2 + 8, 580 581 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 582 }; 583 584 static const struct nt36672a_panel_desc tianma_fhd_video_panel_desc = { 585 .display_mode = &tianma_fhd_video_panel_default_mode, 586 587 .width_mm = 68, 588 .height_mm = 136, 589 590 .mode_flags = MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_VIDEO 591 | MIPI_DSI_MODE_VIDEO_HSE 592 | MIPI_DSI_CLOCK_NON_CONTINUOUS 593 | MIPI_DSI_MODE_VIDEO_BURST, 594 .format = MIPI_DSI_FMT_RGB888, 595 .lanes = 4, 596 .on_cmds_1 = tianma_fhd_video_on_cmds_1, 597 .num_on_cmds_1 = ARRAY_SIZE(tianma_fhd_video_on_cmds_1), 598 .on_cmds_2 = tianma_fhd_video_on_cmds_2, 599 .num_on_cmds_2 = ARRAY_SIZE(tianma_fhd_video_on_cmds_2), 600 .off_cmds = tianma_fhd_video_off_cmds, 601 .num_off_cmds = ARRAY_SIZE(tianma_fhd_video_off_cmds), 602 }; 603 604 static int nt36672a_panel_add(struct nt36672a_panel *pinfo) 605 { 606 struct device *dev = &pinfo->link->dev; 607 int i, ret; 608 609 for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++) 610 pinfo->supplies[i].supply = nt36672a_regulator_names[i]; 611 612 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pinfo->supplies), 613 pinfo->supplies); 614 if (ret < 0) 615 return dev_err_probe(dev, ret, "failed to get regulators\n"); 616 617 for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++) { 618 ret = regulator_set_load(pinfo->supplies[i].consumer, 619 nt36672a_regulator_enable_loads[i]); 620 if (ret) 621 return dev_err_probe(dev, ret, "failed to set regulator enable loads\n"); 622 } 623 624 pinfo->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 625 if (IS_ERR(pinfo->reset_gpio)) 626 return dev_err_probe(dev, PTR_ERR(pinfo->reset_gpio), 627 "failed to get reset gpio from DT\n"); 628 629 drm_panel_init(&pinfo->base, dev, &panel_funcs, DRM_MODE_CONNECTOR_DSI); 630 631 ret = drm_panel_of_backlight(&pinfo->base); 632 if (ret) 633 return dev_err_probe(dev, ret, "Failed to get backlight\n"); 634 635 drm_panel_add(&pinfo->base); 636 637 return 0; 638 } 639 640 static int nt36672a_panel_probe(struct mipi_dsi_device *dsi) 641 { 642 struct nt36672a_panel *pinfo; 643 const struct nt36672a_panel_desc *desc; 644 int err; 645 646 pinfo = devm_kzalloc(&dsi->dev, sizeof(*pinfo), GFP_KERNEL); 647 if (!pinfo) 648 return -ENOMEM; 649 650 desc = of_device_get_match_data(&dsi->dev); 651 dsi->mode_flags = desc->mode_flags; 652 dsi->format = desc->format; 653 dsi->lanes = desc->lanes; 654 pinfo->desc = desc; 655 pinfo->link = dsi; 656 657 mipi_dsi_set_drvdata(dsi, pinfo); 658 659 err = nt36672a_panel_add(pinfo); 660 if (err < 0) 661 return err; 662 663 err = mipi_dsi_attach(dsi); 664 if (err < 0) { 665 drm_panel_remove(&pinfo->base); 666 return err; 667 } 668 669 return 0; 670 } 671 672 static void nt36672a_panel_remove(struct mipi_dsi_device *dsi) 673 { 674 struct nt36672a_panel *pinfo = mipi_dsi_get_drvdata(dsi); 675 int err; 676 677 err = drm_panel_unprepare(&pinfo->base); 678 if (err < 0) 679 dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err); 680 681 err = drm_panel_disable(&pinfo->base); 682 if (err < 0) 683 dev_err(&dsi->dev, "failed to disable panel: %d\n", err); 684 685 err = mipi_dsi_detach(dsi); 686 if (err < 0) 687 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); 688 689 drm_panel_remove(&pinfo->base); 690 } 691 692 static void nt36672a_panel_shutdown(struct mipi_dsi_device *dsi) 693 { 694 struct nt36672a_panel *pinfo = mipi_dsi_get_drvdata(dsi); 695 696 drm_panel_disable(&pinfo->base); 697 drm_panel_unprepare(&pinfo->base); 698 } 699 700 static const struct of_device_id tianma_fhd_video_of_match[] = { 701 { .compatible = "tianma,fhd-video", .data = &tianma_fhd_video_panel_desc }, 702 { }, 703 }; 704 MODULE_DEVICE_TABLE(of, tianma_fhd_video_of_match); 705 706 static struct mipi_dsi_driver nt36672a_panel_driver = { 707 .driver = { 708 .name = "panel-tianma-nt36672a", 709 .of_match_table = tianma_fhd_video_of_match, 710 }, 711 .probe = nt36672a_panel_probe, 712 .remove = nt36672a_panel_remove, 713 .shutdown = nt36672a_panel_shutdown, 714 }; 715 module_mipi_dsi_driver(nt36672a_panel_driver); 716 717 MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>"); 718 MODULE_DESCRIPTION("NOVATEK NT36672A based MIPI-DSI LCD panel driver"); 719 MODULE_LICENSE("GPL"); 720