1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Ilitek ILI9341 TFT LCD drm_panel driver. 4 * 5 * This panel can be configured to support: 6 * - 16-bit parallel RGB interface 7 * - 18-bit parallel RGB interface 8 * - 4-line serial spi interface 9 * 10 * Copyright (C) 2021 Dillon Min <dillon.minfei@gmail.com> 11 * 12 * For dbi+dpi part: 13 * Derived from drivers/drm/gpu/panel/panel-ilitek-ili9322.c 14 * the reuse of DBI abstraction part referred from Linus's patch 15 * "drm/panel: s6e63m0: Switch to DBI abstraction for SPI" 16 */ 17 18 #include <linux/backlight.h> 19 #include <linux/bitops.h> 20 #include <linux/delay.h> 21 #include <linux/gpio/consumer.h> 22 #include <linux/mod_devicetable.h> 23 #include <linux/module.h> 24 #include <linux/property.h> 25 #include <linux/regulator/consumer.h> 26 #include <linux/spi/spi.h> 27 28 #include <video/mipi_display.h> 29 30 #include <drm/drm_atomic_helper.h> 31 #include <drm/drm_drv.h> 32 #include <drm/drm_fbdev_dma.h> 33 #include <drm/drm_gem_atomic_helper.h> 34 #include <drm/drm_gem_dma_helper.h> 35 #include <drm/drm_gem_framebuffer_helper.h> 36 #include <drm/drm_mipi_dbi.h> 37 #include <drm/drm_modes.h> 38 #include <drm/drm_panel.h> 39 #include <drm/drm_print.h> 40 41 #define ILI9341_RGB_INTERFACE 0xb0 /* RGB Interface Signal Control */ 42 #define ILI9341_FRC 0xb1 /* Frame Rate Control register */ 43 #define ILI9341_DFC 0xb6 /* Display Function Control register */ 44 #define ILI9341_POWER1 0xc0 /* Power Control 1 register */ 45 #define ILI9341_POWER2 0xc1 /* Power Control 2 register */ 46 #define ILI9341_VCOM1 0xc5 /* VCOM Control 1 register */ 47 #define ILI9341_VCOM2 0xc7 /* VCOM Control 2 register */ 48 #define ILI9341_POWERA 0xcb /* Power control A register */ 49 #define ILI9341_POWERB 0xcf /* Power control B register */ 50 #define ILI9341_PGAMMA 0xe0 /* Positive Gamma Correction register */ 51 #define ILI9341_NGAMMA 0xe1 /* Negative Gamma Correction register */ 52 #define ILI9341_DTCA 0xe8 /* Driver timing control A */ 53 #define ILI9341_DTCB 0xea /* Driver timing control B */ 54 #define ILI9341_POWER_SEQ 0xed /* Power on sequence register */ 55 #define ILI9341_3GAMMA_EN 0xf2 /* 3 Gamma enable register */ 56 #define ILI9341_INTERFACE 0xf6 /* Interface control register */ 57 #define ILI9341_PRC 0xf7 /* Pump ratio control register */ 58 #define ILI9341_ETMOD 0xb7 /* Entry mode set */ 59 60 #define ILI9341_MADCTL_BGR BIT(3) 61 #define ILI9341_MADCTL_MV BIT(5) 62 #define ILI9341_MADCTL_MX BIT(6) 63 #define ILI9341_MADCTL_MY BIT(7) 64 65 #define ILI9341_POWER_B_LEN 3 66 #define ILI9341_POWER_SEQ_LEN 4 67 #define ILI9341_DTCA_LEN 3 68 #define ILI9341_DTCB_LEN 2 69 #define ILI9341_POWER_A_LEN 5 70 #define ILI9341_DFC_1_LEN 2 71 #define ILI9341_FRC_LEN 2 72 #define ILI9341_VCOM_1_LEN 2 73 #define ILI9341_DFC_2_LEN 4 74 #define ILI9341_COLUMN_ADDR_LEN 4 75 #define ILI9341_PAGE_ADDR_LEN 4 76 #define ILI9341_INTERFACE_LEN 3 77 #define ILI9341_PGAMMA_LEN 15 78 #define ILI9341_NGAMMA_LEN 15 79 #define ILI9341_CA_LEN 3 80 81 #define ILI9341_PIXEL_DPI_16_BITS (BIT(6) | BIT(4)) 82 #define ILI9341_PIXEL_DPI_18_BITS (BIT(6) | BIT(5)) 83 #define ILI9341_GAMMA_CURVE_1 BIT(0) 84 #define ILI9341_IF_WE_MODE BIT(0) 85 #define ILI9341_IF_BIG_ENDIAN 0x00 86 #define ILI9341_IF_DM_RGB BIT(2) 87 #define ILI9341_IF_DM_INTERNAL 0x00 88 #define ILI9341_IF_DM_VSYNC BIT(3) 89 #define ILI9341_IF_RM_RGB BIT(1) 90 #define ILI9341_IF_RIM_RGB 0x00 91 92 #define ILI9341_COLUMN_ADDR 0x00ef 93 #define ILI9341_PAGE_ADDR 0x013f 94 95 #define ILI9341_RGB_EPL BIT(0) 96 #define ILI9341_RGB_DPL BIT(1) 97 #define ILI9341_RGB_HSPL BIT(2) 98 #define ILI9341_RGB_VSPL BIT(3) 99 #define ILI9341_RGB_DE_MODE BIT(6) 100 #define ILI9341_RGB_DISP_PATH_MEM BIT(7) 101 102 #define ILI9341_DBI_VCOMH_4P6V 0x23 103 #define ILI9341_DBI_PWR_2_DEFAULT 0x10 104 #define ILI9341_DBI_PRC_NORMAL 0x20 105 #define ILI9341_DBI_VCOM_1_VMH_4P25V 0x3e 106 #define ILI9341_DBI_VCOM_1_VML_1P5V 0x28 107 #define ILI9341_DBI_VCOM_2_DEC_58 0x86 108 #define ILI9341_DBI_FRC_DIVA 0x00 109 #define ILI9341_DBI_FRC_RTNA 0x1b 110 #define ILI9341_DBI_EMS_GAS BIT(0) 111 #define ILI9341_DBI_EMS_DTS BIT(1) 112 #define ILI9341_DBI_EMS_GON BIT(2) 113 114 /* struct ili9341_config - the system specific ILI9341 configuration */ 115 struct ili9341_config { 116 u32 max_spi_speed; 117 /* mode: the drm display mode */ 118 const struct drm_display_mode mode; 119 /* ca: TODO: need comments for this register */ 120 u8 ca[ILI9341_CA_LEN]; 121 /* power_b: Power control B (CFh) */ 122 u8 power_b[ILI9341_POWER_B_LEN]; 123 /* power_seq: Power on sequence control (EDh) */ 124 u8 power_seq[ILI9341_POWER_SEQ_LEN]; 125 /* dtca: Driver timing control A (E8h) */ 126 u8 dtca[ILI9341_DTCA_LEN]; 127 /* dtcb: Driver timing control B (EAh) */ 128 u8 dtcb[ILI9341_DTCB_LEN]; 129 /* power_a: Power control A (CBh) */ 130 u8 power_a[ILI9341_POWER_A_LEN]; 131 /* frc: Frame Rate Control (In Normal Mode/Full Colors) (B1h) */ 132 u8 frc[ILI9341_FRC_LEN]; 133 /* prc: Pump ratio control (F7h) */ 134 u8 prc; 135 /* dfc_1: B6h DISCTRL (Display Function Control) */ 136 u8 dfc_1[ILI9341_DFC_1_LEN]; 137 /* power_1: Power Control 1 (C0h) */ 138 u8 power_1; 139 /* power_2: Power Control 2 (C1h) */ 140 u8 power_2; 141 /* vcom_1: VCOM Control 1(C5h) */ 142 u8 vcom_1[ILI9341_VCOM_1_LEN]; 143 /* vcom_2: VCOM Control 2(C7h) */ 144 u8 vcom_2; 145 /* address_mode: Memory Access Control (36h) */ 146 u8 address_mode; 147 /* g3amma_en: Enable 3G (F2h) */ 148 u8 g3amma_en; 149 /* rgb_interface: RGB Interface Signal Control (B0h) */ 150 u8 rgb_interface; 151 /* dfc_2: refer to dfc_1 */ 152 u8 dfc_2[ILI9341_DFC_2_LEN]; 153 /* column_addr: Column Address Set (2Ah) */ 154 u8 column_addr[ILI9341_COLUMN_ADDR_LEN]; 155 /* page_addr: Page Address Set (2Bh) */ 156 u8 page_addr[ILI9341_PAGE_ADDR_LEN]; 157 /* interface: Interface Control (F6h) */ 158 u8 interface[ILI9341_INTERFACE_LEN]; 159 /* 160 * pixel_format: This command sets the pixel format for the RGB 161 * image data used by 162 */ 163 u8 pixel_format; 164 /* 165 * gamma_curve: This command is used to select the desired Gamma 166 * curve for the 167 */ 168 u8 gamma_curve; 169 /* pgamma: Positive Gamma Correction (E0h) */ 170 u8 pgamma[ILI9341_PGAMMA_LEN]; 171 /* ngamma: Negative Gamma Correction (E1h) */ 172 u8 ngamma[ILI9341_NGAMMA_LEN]; 173 }; 174 175 struct ili9341 { 176 struct device *dev; 177 const struct ili9341_config *conf; 178 struct drm_panel panel; 179 struct gpio_desc *reset_gpio; 180 struct gpio_desc *dc_gpio; 181 struct mipi_dbi *dbi; 182 u32 max_spi_speed; 183 struct regulator_bulk_data supplies[3]; 184 }; 185 186 /* 187 * The Stm32f429-disco board has a panel ili9341 connected to ltdc controller 188 */ 189 static const struct ili9341_config ili9341_stm32f429_disco_data = { 190 .max_spi_speed = 10000000, 191 .mode = { 192 .clock = 6100, 193 .hdisplay = 240, 194 .hsync_start = 240 + 10,/* hfp 10 */ 195 .hsync_end = 240 + 10 + 10,/* hsync 10 */ 196 .htotal = 240 + 10 + 10 + 20,/* hbp 20 */ 197 .vdisplay = 320, 198 .vsync_start = 320 + 4,/* vfp 4 */ 199 .vsync_end = 320 + 4 + 2,/* vsync 2 */ 200 .vtotal = 320 + 4 + 2 + 2,/* vbp 2 */ 201 .flags = 0, 202 .width_mm = 65, 203 .height_mm = 50, 204 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 205 }, 206 .ca = {0xc3, 0x08, 0x50}, 207 .power_b = {0x00, 0xc1, 0x30}, 208 .power_seq = {0x64, 0x03, 0x12, 0x81}, 209 .dtca = {0x85, 0x00, 0x78}, 210 .power_a = {0x39, 0x2c, 0x00, 0x34, 0x02}, 211 .prc = 0x20, 212 .dtcb = {0x00, 0x00}, 213 /* 0x00 fosc, 0x1b 70hz */ 214 .frc = {0x00, 0x1b}, 215 /* 216 * 0x0a Interval scan, AGND AGND AGND AGND 217 * 0xa2 Normally white, G1 -> G320, S720 -> S1, 218 * Scan Cycle 5 frames,85ms 219 */ 220 .dfc_1 = {0x0a, 0xa2}, 221 /* 0x10 3.65v */ 222 .power_1 = 0x10, 223 /* 0x10 AVDD=vci*2, VGH=vci*7, VGL=-vci*4 */ 224 .power_2 = 0x10, 225 /* 0x45 VCOMH 4.425v, 0x15 VCOML -1.975*/ 226 .vcom_1 = {0x45, 0x15}, 227 /* 0x90 offset voltage, VMH-48, VML-48 */ 228 .vcom_2 = 0x90, 229 /* 230 * 0xc8 Row Address Order, Column Address Order 231 * BGR 1 232 */ 233 .address_mode = 0xc8, 234 .g3amma_en = 0x00, 235 /* 236 * 0xc2 237 * Display Data Path: Memory 238 * RGB: DE mode 239 * DOTCLK polarity set (data fetched at the falling time) 240 */ 241 .rgb_interface = ILI9341_RGB_DISP_PATH_MEM | 242 ILI9341_RGB_DE_MODE | 243 ILI9341_RGB_DPL, 244 /* 245 * 0x0a 246 * Gate outputs in non-display area: Interval scan 247 * Determine source/VCOM output in a non-display area in the partial 248 * display mode: AGND AGND AGND AGND 249 * 250 * 0xa7 251 * Scan Cycle: 15 frames 252 * fFLM = 60Hz: 255ms 253 * Liquid crystal type: Normally white 254 * Gate Output Scan Direction: G1 -> G320 255 * Source Output Scan Direction: S720 -> S1 256 * 257 * 0x27 258 * LCD Driver Line: 320 lines 259 * 260 * 0x04 261 * PCDIV: 4 262 */ 263 .dfc_2 = {0x0a, 0xa7, 0x27, 0x04}, 264 /* column address: 240 */ 265 .column_addr = {0x00, 0x00, (ILI9341_COLUMN_ADDR >> 4) & 0xff, 266 ILI9341_COLUMN_ADDR & 0xff}, 267 /* page address: 320 */ 268 .page_addr = {0x00, 0x00, (ILI9341_PAGE_ADDR >> 4) & 0xff, 269 ILI9341_PAGE_ADDR & 0xff}, 270 /* 271 * Memory write control: When the transfer number of data exceeds 272 * (EC-SC+1)*(EP-SP+1), the column and page number will be 273 * reset, and the exceeding data will be written into the following 274 * column and page. 275 * Display Operation Mode: RGB Interface Mode 276 * Interface for RAM Access: RGB interface 277 * 16- bit RGB interface (1 transfer/pixel) 278 */ 279 .interface = {ILI9341_IF_WE_MODE, 0x00, 280 ILI9341_IF_DM_RGB | ILI9341_IF_RM_RGB}, 281 /* DPI: 16 bits / pixel */ 282 .pixel_format = ILI9341_PIXEL_DPI_16_BITS, 283 /* Curve Selected: Gamma curve 1 (G2.2) */ 284 .gamma_curve = ILI9341_GAMMA_CURVE_1, 285 .pgamma = {0x0f, 0x29, 0x24, 0x0c, 0x0e, 286 0x09, 0x4e, 0x78, 0x3c, 0x09, 287 0x13, 0x05, 0x17, 0x11, 0x00}, 288 .ngamma = {0x00, 0x16, 0x1b, 0x04, 0x11, 289 0x07, 0x31, 0x33, 0x42, 0x05, 290 0x0c, 0x0a, 0x28, 0x2f, 0x0f}, 291 }; 292 293 static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel) 294 { 295 return container_of(panel, struct ili9341, panel); 296 } 297 298 static void ili9341_dpi_init(struct ili9341 *ili) 299 { 300 struct device *dev = (&ili->panel)->dev; 301 struct mipi_dbi *dbi = ili->dbi; 302 struct ili9341_config *cfg = (struct ili9341_config *)ili->conf; 303 304 /* Power Control */ 305 mipi_dbi_command_stackbuf(dbi, 0xca, cfg->ca, ILI9341_CA_LEN); 306 mipi_dbi_command_stackbuf(dbi, ILI9341_POWERB, cfg->power_b, 307 ILI9341_POWER_B_LEN); 308 mipi_dbi_command_stackbuf(dbi, ILI9341_POWER_SEQ, cfg->power_seq, 309 ILI9341_POWER_SEQ_LEN); 310 mipi_dbi_command_stackbuf(dbi, ILI9341_DTCA, cfg->dtca, 311 ILI9341_DTCA_LEN); 312 mipi_dbi_command_stackbuf(dbi, ILI9341_POWERA, cfg->power_a, 313 ILI9341_POWER_A_LEN); 314 mipi_dbi_command(ili->dbi, ILI9341_PRC, cfg->prc); 315 mipi_dbi_command_stackbuf(dbi, ILI9341_DTCB, cfg->dtcb, 316 ILI9341_DTCB_LEN); 317 mipi_dbi_command_stackbuf(dbi, ILI9341_FRC, cfg->frc, ILI9341_FRC_LEN); 318 mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_1, 319 ILI9341_DFC_1_LEN); 320 mipi_dbi_command(dbi, ILI9341_POWER1, cfg->power_1); 321 mipi_dbi_command(dbi, ILI9341_POWER2, cfg->power_2); 322 323 /* VCOM */ 324 mipi_dbi_command_stackbuf(dbi, ILI9341_VCOM1, cfg->vcom_1, 325 ILI9341_VCOM_1_LEN); 326 mipi_dbi_command(dbi, ILI9341_VCOM2, cfg->vcom_2); 327 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, cfg->address_mode); 328 329 /* Gamma */ 330 mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, cfg->g3amma_en); 331 mipi_dbi_command(dbi, ILI9341_RGB_INTERFACE, cfg->rgb_interface); 332 mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_2, 333 ILI9341_DFC_2_LEN); 334 335 /* Colomn address set */ 336 mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_COLUMN_ADDRESS, 337 cfg->column_addr, ILI9341_COLUMN_ADDR_LEN); 338 339 /* Page address set */ 340 mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_PAGE_ADDRESS, 341 cfg->page_addr, ILI9341_PAGE_ADDR_LEN); 342 mipi_dbi_command_stackbuf(dbi, ILI9341_INTERFACE, cfg->interface, 343 ILI9341_INTERFACE_LEN); 344 345 /* Format */ 346 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, cfg->pixel_format); 347 mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START); 348 msleep(200); 349 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, cfg->gamma_curve); 350 mipi_dbi_command_stackbuf(dbi, ILI9341_PGAMMA, cfg->pgamma, 351 ILI9341_PGAMMA_LEN); 352 mipi_dbi_command_stackbuf(dbi, ILI9341_NGAMMA, cfg->ngamma, 353 ILI9341_NGAMMA_LEN); 354 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); 355 msleep(200); 356 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); 357 mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START); 358 359 dev_info(dev, "Initialized display rgb interface\n"); 360 } 361 362 static int ili9341_dpi_power_on(struct ili9341 *ili) 363 { 364 struct device *dev = (&ili->panel)->dev; 365 int ret = 0; 366 367 /* Assert RESET */ 368 gpiod_set_value(ili->reset_gpio, 1); 369 370 /* Enable power */ 371 ret = regulator_bulk_enable(ARRAY_SIZE(ili->supplies), 372 ili->supplies); 373 if (ret < 0) { 374 dev_err(dev, "unable to enable vcc\n"); 375 return ret; 376 } 377 msleep(20); 378 379 /* De-assert RESET */ 380 gpiod_set_value(ili->reset_gpio, 0); 381 msleep(20); 382 383 return 0; 384 } 385 386 static int ili9341_dpi_power_off(struct ili9341 *ili) 387 { 388 /* Assert RESET */ 389 gpiod_set_value(ili->reset_gpio, 1); 390 391 /* Disable power */ 392 return regulator_bulk_disable(ARRAY_SIZE(ili->supplies), 393 ili->supplies); 394 } 395 396 static int ili9341_dpi_disable(struct drm_panel *panel) 397 { 398 struct ili9341 *ili = panel_to_ili9341(panel); 399 400 mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_OFF); 401 return 0; 402 } 403 404 static int ili9341_dpi_unprepare(struct drm_panel *panel) 405 { 406 struct ili9341 *ili = panel_to_ili9341(panel); 407 408 return ili9341_dpi_power_off(ili); 409 } 410 411 static int ili9341_dpi_prepare(struct drm_panel *panel) 412 { 413 struct ili9341 *ili = panel_to_ili9341(panel); 414 int ret; 415 416 ret = ili9341_dpi_power_on(ili); 417 if (ret < 0) 418 return ret; 419 420 ili9341_dpi_init(ili); 421 422 return 0; 423 } 424 425 static int ili9341_dpi_enable(struct drm_panel *panel) 426 { 427 struct ili9341 *ili = panel_to_ili9341(panel); 428 429 mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_ON); 430 return 0; 431 } 432 433 static int ili9341_dpi_get_modes(struct drm_panel *panel, 434 struct drm_connector *connector) 435 { 436 struct ili9341 *ili = panel_to_ili9341(panel); 437 struct drm_device *drm = connector->dev; 438 struct drm_display_mode *mode; 439 struct drm_display_info *info; 440 441 info = &connector->display_info; 442 info->width_mm = ili->conf->mode.width_mm; 443 info->height_mm = ili->conf->mode.height_mm; 444 445 if (ili->conf->rgb_interface & ILI9341_RGB_DPL) 446 info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 447 else 448 info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 449 450 if (ili->conf->rgb_interface & ILI9341_RGB_EPL) 451 info->bus_flags |= DRM_BUS_FLAG_DE_LOW; 452 else 453 info->bus_flags |= DRM_BUS_FLAG_DE_HIGH; 454 455 mode = drm_mode_duplicate(drm, &ili->conf->mode); 456 if (!mode) { 457 drm_err(drm, "bad mode or failed to add mode\n"); 458 return -EINVAL; 459 } 460 drm_mode_set_name(mode); 461 462 /* Set up the polarity */ 463 if (ili->conf->rgb_interface & ILI9341_RGB_HSPL) 464 mode->flags |= DRM_MODE_FLAG_PHSYNC; 465 else 466 mode->flags |= DRM_MODE_FLAG_NHSYNC; 467 468 if (ili->conf->rgb_interface & ILI9341_RGB_VSPL) 469 mode->flags |= DRM_MODE_FLAG_PVSYNC; 470 else 471 mode->flags |= DRM_MODE_FLAG_NVSYNC; 472 473 drm_mode_probed_add(connector, mode); 474 475 return 1; /* Number of modes */ 476 } 477 478 static const struct drm_panel_funcs ili9341_dpi_funcs = { 479 .disable = ili9341_dpi_disable, 480 .unprepare = ili9341_dpi_unprepare, 481 .prepare = ili9341_dpi_prepare, 482 .enable = ili9341_dpi_enable, 483 .get_modes = ili9341_dpi_get_modes, 484 }; 485 486 static int ili9341_dpi_probe(struct spi_device *spi, struct gpio_desc *dc, 487 struct gpio_desc *reset) 488 { 489 struct device *dev = &spi->dev; 490 struct ili9341 *ili; 491 int ret; 492 493 ili = devm_kzalloc(dev, sizeof(struct ili9341), GFP_KERNEL); 494 if (!ili) 495 return -ENOMEM; 496 497 ili->dbi = devm_kzalloc(dev, sizeof(struct mipi_dbi), 498 GFP_KERNEL); 499 if (!ili->dbi) 500 return -ENOMEM; 501 502 ili->supplies[0].supply = "vci"; 503 ili->supplies[1].supply = "vddi"; 504 ili->supplies[2].supply = "vddi-led"; 505 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ili->supplies), 506 ili->supplies); 507 if (ret < 0) { 508 dev_err(dev, "failed to get regulators: %d\n", ret); 509 return ret; 510 } 511 512 ret = mipi_dbi_spi_init(spi, ili->dbi, dc); 513 if (ret) 514 return ret; 515 516 spi_set_drvdata(spi, ili); 517 ili->reset_gpio = reset; 518 /* 519 * Every new incarnation of this display must have a unique 520 * data entry for the system in this driver. 521 */ 522 ili->conf = device_get_match_data(dev); 523 if (!ili->conf) { 524 dev_err(dev, "missing device configuration\n"); 525 return -ENODEV; 526 } 527 528 ili->max_spi_speed = ili->conf->max_spi_speed; 529 drm_panel_init(&ili->panel, dev, &ili9341_dpi_funcs, 530 DRM_MODE_CONNECTOR_DPI); 531 drm_panel_add(&ili->panel); 532 533 return 0; 534 } 535 536 static int ili9341_probe(struct spi_device *spi) 537 { 538 struct device *dev = &spi->dev; 539 struct gpio_desc *dc; 540 struct gpio_desc *reset; 541 542 reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 543 if (IS_ERR(reset)) 544 return dev_err_probe(dev, PTR_ERR(reset), "Failed to get gpio 'reset'\n"); 545 546 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); 547 if (IS_ERR(dc)) 548 return dev_err_probe(dev, PTR_ERR(dc), "Failed to get gpio 'dc'\n"); 549 550 return ili9341_dpi_probe(spi, dc, reset); 551 } 552 553 static void ili9341_remove(struct spi_device *spi) 554 { 555 struct ili9341 *ili = spi_get_drvdata(spi); 556 557 ili9341_dpi_power_off(ili); 558 drm_panel_remove(&ili->panel); 559 } 560 561 static const struct of_device_id ili9341_of_match[] = { 562 { 563 .compatible = "st,sf-tc240t-9370-t", 564 .data = &ili9341_stm32f429_disco_data, 565 }, 566 { } 567 }; 568 MODULE_DEVICE_TABLE(of, ili9341_of_match); 569 570 static const struct spi_device_id ili9341_id[] = { 571 { "sf-tc240t-9370-t", 0 }, 572 { } 573 }; 574 MODULE_DEVICE_TABLE(spi, ili9341_id); 575 576 static struct spi_driver ili9341_driver = { 577 .probe = ili9341_probe, 578 .remove = ili9341_remove, 579 .id_table = ili9341_id, 580 .driver = { 581 .name = "panel-ilitek-ili9341", 582 .of_match_table = ili9341_of_match, 583 }, 584 }; 585 module_spi_driver(ili9341_driver); 586 587 MODULE_AUTHOR("Dillon Min <dillon.minfei@gmail.com>"); 588 MODULE_DESCRIPTION("ILI9341 LCD panel driver"); 589 MODULE_LICENSE("GPL v2"); 590