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 * For only-dbi part, copy from David's code (drm/tiny/ili9341.c) 18 * Copyright 2018 David Lechner <david@lechnology.com> 19 */ 20 21 #include <linux/bitops.h> 22 #include <linux/delay.h> 23 #include <linux/gpio/consumer.h> 24 #include <linux/module.h> 25 #include <linux/of_device.h> 26 #include <linux/regulator/consumer.h> 27 #include <linux/spi/spi.h> 28 29 #include <video/mipi_display.h> 30 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_drv.h> 33 #include <drm/drm_fb_helper.h> 34 #include <drm/drm_gem_atomic_helper.h> 35 #include <drm/drm_gem_dma_helper.h> 36 #include <drm/drm_gem_framebuffer_helper.h> 37 #include <drm/drm_mipi_dbi.h> 38 #include <drm/drm_modes.h> 39 #include <drm/drm_panel.h> 40 #include <drm/drm_print.h> 41 42 #define ILI9341_RGB_INTERFACE 0xb0 /* RGB Interface Signal Control */ 43 #define ILI9341_FRC 0xb1 /* Frame Rate Control register */ 44 #define ILI9341_DFC 0xb6 /* Display Function Control register */ 45 #define ILI9341_POWER1 0xc0 /* Power Control 1 register */ 46 #define ILI9341_POWER2 0xc1 /* Power Control 2 register */ 47 #define ILI9341_VCOM1 0xc5 /* VCOM Control 1 register */ 48 #define ILI9341_VCOM2 0xc7 /* VCOM Control 2 register */ 49 #define ILI9341_POWERA 0xcb /* Power control A register */ 50 #define ILI9341_POWERB 0xcf /* Power control B register */ 51 #define ILI9341_PGAMMA 0xe0 /* Positive Gamma Correction register */ 52 #define ILI9341_NGAMMA 0xe1 /* Negative Gamma Correction register */ 53 #define ILI9341_DTCA 0xe8 /* Driver timing control A */ 54 #define ILI9341_DTCB 0xea /* Driver timing control B */ 55 #define ILI9341_POWER_SEQ 0xed /* Power on sequence register */ 56 #define ILI9341_3GAMMA_EN 0xf2 /* 3 Gamma enable register */ 57 #define ILI9341_INTERFACE 0xf6 /* Interface control register */ 58 #define ILI9341_PRC 0xf7 /* Pump ratio control register */ 59 #define ILI9341_ETMOD 0xb7 /* Entry mode set */ 60 61 #define ILI9341_MADCTL_BGR BIT(3) 62 #define ILI9341_MADCTL_MV BIT(5) 63 #define ILI9341_MADCTL_MX BIT(6) 64 #define ILI9341_MADCTL_MY BIT(7) 65 66 #define ILI9341_POWER_B_LEN 3 67 #define ILI9341_POWER_SEQ_LEN 4 68 #define ILI9341_DTCA_LEN 3 69 #define ILI9341_DTCB_LEN 2 70 #define ILI9341_POWER_A_LEN 5 71 #define ILI9341_DFC_1_LEN 2 72 #define ILI9341_FRC_LEN 2 73 #define ILI9341_VCOM_1_LEN 2 74 #define ILI9341_DFC_2_LEN 4 75 #define ILI9341_COLUMN_ADDR_LEN 4 76 #define ILI9341_PAGE_ADDR_LEN 4 77 #define ILI9341_INTERFACE_LEN 3 78 #define ILI9341_PGAMMA_LEN 15 79 #define ILI9341_NGAMMA_LEN 15 80 #define ILI9341_CA_LEN 3 81 82 #define ILI9341_PIXEL_DPI_16_BITS (BIT(6) | BIT(4)) 83 #define ILI9341_PIXEL_DPI_18_BITS (BIT(6) | BIT(5)) 84 #define ILI9341_GAMMA_CURVE_1 BIT(0) 85 #define ILI9341_IF_WE_MODE BIT(0) 86 #define ILI9341_IF_BIG_ENDIAN 0x00 87 #define ILI9341_IF_DM_RGB BIT(2) 88 #define ILI9341_IF_DM_INTERNAL 0x00 89 #define ILI9341_IF_DM_VSYNC BIT(3) 90 #define ILI9341_IF_RM_RGB BIT(1) 91 #define ILI9341_IF_RIM_RGB 0x00 92 93 #define ILI9341_COLUMN_ADDR 0x00ef 94 #define ILI9341_PAGE_ADDR 0x013f 95 96 #define ILI9341_RGB_EPL BIT(0) 97 #define ILI9341_RGB_DPL BIT(1) 98 #define ILI9341_RGB_HSPL BIT(2) 99 #define ILI9341_RGB_VSPL BIT(3) 100 #define ILI9341_RGB_DE_MODE BIT(6) 101 #define ILI9341_RGB_DISP_PATH_MEM BIT(7) 102 103 #define ILI9341_DBI_VCOMH_4P6V 0x23 104 #define ILI9341_DBI_PWR_2_DEFAULT 0x10 105 #define ILI9341_DBI_PRC_NORMAL 0x20 106 #define ILI9341_DBI_VCOM_1_VMH_4P25V 0x3e 107 #define ILI9341_DBI_VCOM_1_VML_1P5V 0x28 108 #define ILI9341_DBI_VCOM_2_DEC_58 0x86 109 #define ILI9341_DBI_FRC_DIVA 0x00 110 #define ILI9341_DBI_FRC_RTNA 0x1b 111 #define ILI9341_DBI_EMS_GAS BIT(0) 112 #define ILI9341_DBI_EMS_DTS BIT(1) 113 #define ILI9341_DBI_EMS_GON BIT(2) 114 115 /* struct ili9341_config - the system specific ILI9341 configuration */ 116 struct ili9341_config { 117 u32 max_spi_speed; 118 /* mode: the drm display mode */ 119 const struct drm_display_mode mode; 120 /* ca: TODO: need comments for this register */ 121 u8 ca[ILI9341_CA_LEN]; 122 /* power_b: TODO: need comments for this register */ 123 u8 power_b[ILI9341_POWER_B_LEN]; 124 /* power_seq: TODO: need comments for this register */ 125 u8 power_seq[ILI9341_POWER_SEQ_LEN]; 126 /* dtca: TODO: need comments for this register */ 127 u8 dtca[ILI9341_DTCA_LEN]; 128 /* dtcb: TODO: need comments for this register */ 129 u8 dtcb[ILI9341_DTCB_LEN]; 130 /* power_a: TODO: need comments for this register */ 131 u8 power_a[ILI9341_POWER_A_LEN]; 132 /* frc: Frame Rate Control (In Normal Mode/Full Colors) (B1h) */ 133 u8 frc[ILI9341_FRC_LEN]; 134 /* prc: TODO: need comments for this register */ 135 u8 prc; 136 /* dfc_1: B6h DISCTRL (Display Function Control) */ 137 u8 dfc_1[ILI9341_DFC_1_LEN]; 138 /* power_1: Power Control 1 (C0h) */ 139 u8 power_1; 140 /* power_2: Power Control 2 (C1h) */ 141 u8 power_2; 142 /* vcom_1: VCOM Control 1(C5h) */ 143 u8 vcom_1[ILI9341_VCOM_1_LEN]; 144 /* vcom_2: VCOM Control 2(C7h) */ 145 u8 vcom_2; 146 /* address_mode: Memory Access Control (36h) */ 147 u8 address_mode; 148 /* g3amma_en: TODO: need comments for this register */ 149 u8 g3amma_en; 150 /* rgb_interface: RGB Interface Signal Control (B0h) */ 151 u8 rgb_interface; 152 /* dfc_2: refer to dfc_1 */ 153 u8 dfc_2[ILI9341_DFC_2_LEN]; 154 /* column_addr: Column Address Set (2Ah) */ 155 u8 column_addr[ILI9341_COLUMN_ADDR_LEN]; 156 /* page_addr: Page Address Set (2Bh) */ 157 u8 page_addr[ILI9341_PAGE_ADDR_LEN]; 158 /* interface: Interface Control (F6h) */ 159 u8 interface[ILI9341_INTERFACE_LEN]; 160 /* 161 * pixel_format: This command sets the pixel format for the RGB 162 * image data used by 163 */ 164 u8 pixel_format; 165 /* 166 * gamma_curve: This command is used to select the desired Gamma 167 * curve for the 168 */ 169 u8 gamma_curve; 170 /* pgamma: Positive Gamma Correction (E0h) */ 171 u8 pgamma[ILI9341_PGAMMA_LEN]; 172 /* ngamma: Negative Gamma Correction (E1h) */ 173 u8 ngamma[ILI9341_NGAMMA_LEN]; 174 }; 175 176 struct ili9341 { 177 struct device *dev; 178 const struct ili9341_config *conf; 179 struct drm_panel panel; 180 struct gpio_desc *reset_gpio; 181 struct gpio_desc *dc_gpio; 182 struct mipi_dbi *dbi; 183 u32 max_spi_speed; 184 struct regulator_bulk_data supplies[3]; 185 }; 186 187 /* 188 * The Stm32f429-disco board has a panel ili9341 connected to ltdc controller 189 */ 190 static const struct ili9341_config ili9341_stm32f429_disco_data = { 191 .max_spi_speed = 10000000, 192 .mode = { 193 .clock = 6100, 194 .hdisplay = 240, 195 .hsync_start = 240 + 10,/* hfp 10 */ 196 .hsync_end = 240 + 10 + 10,/* hsync 10 */ 197 .htotal = 240 + 10 + 10 + 20,/* hbp 20 */ 198 .vdisplay = 320, 199 .vsync_start = 320 + 4,/* vfp 4 */ 200 .vsync_end = 320 + 4 + 2,/* vsync 2 */ 201 .vtotal = 320 + 4 + 2 + 2,/* vbp 2 */ 202 .flags = 0, 203 .width_mm = 65, 204 .height_mm = 50, 205 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 206 }, 207 .ca = {0xc3, 0x08, 0x50}, 208 .power_b = {0x00, 0xc1, 0x30}, 209 .power_seq = {0x64, 0x03, 0x12, 0x81}, 210 .dtca = {0x85, 0x00, 0x78}, 211 .power_a = {0x39, 0x2c, 0x00, 0x34, 0x02}, 212 .prc = 0x20, 213 .dtcb = {0x00, 0x00}, 214 /* 0x00 fosc, 0x1b 70hz */ 215 .frc = {0x00, 0x1b}, 216 /* 217 * 0x0a Interval scan, AGND AGND AGND AGND 218 * 0xa2 Normally white, G1 -> G320, S720 -> S1, 219 * Scan Cycle 5 frames,85ms 220 */ 221 .dfc_1 = {0x0a, 0xa2}, 222 /* 0x10 3.65v */ 223 .power_1 = 0x10, 224 /* 0x10 AVDD=vci*2, VGH=vci*7, VGL=-vci*4 */ 225 .power_2 = 0x10, 226 /* 0x45 VCOMH 4.425v, 0x15 VCOML -1.975*/ 227 .vcom_1 = {0x45, 0x15}, 228 /* 0x90 offset voltage, VMH-48, VML-48 */ 229 .vcom_2 = 0x90, 230 /* 231 * 0xc8 Row Address Order, Column Address Order 232 * BGR 1 233 */ 234 .address_mode = 0xc8, 235 .g3amma_en = 0x00, 236 /* 237 * 0xc2 238 * Display Data Path: Memory 239 * RGB: DE mode 240 * DOTCLK polarity set (data fetched at the falling time) 241 */ 242 .rgb_interface = ILI9341_RGB_DISP_PATH_MEM | 243 ILI9341_RGB_DE_MODE | 244 ILI9341_RGB_DPL, 245 /* 246 * 0x0a 247 * Gate outputs in non-display area: Interval scan 248 * Determine source/VCOM output in a non-display area in the partial 249 * display mode: AGND AGND AGND AGND 250 * 251 * 0xa7 252 * Scan Cycle: 15 frames 253 * fFLM = 60Hz: 255ms 254 * Liquid crystal type: Normally white 255 * Gate Output Scan Direction: G1 -> G320 256 * Source Output Scan Direction: S720 -> S1 257 * 258 * 0x27 259 * LCD Driver Line: 320 lines 260 * 261 * 0x04 262 * PCDIV: 4 263 */ 264 .dfc_2 = {0x0a, 0xa7, 0x27, 0x04}, 265 /* column address: 240 */ 266 .column_addr = {0x00, 0x00, (ILI9341_COLUMN_ADDR >> 4) & 0xff, 267 ILI9341_COLUMN_ADDR & 0xff}, 268 /* page address: 320 */ 269 .page_addr = {0x00, 0x00, (ILI9341_PAGE_ADDR >> 4) & 0xff, 270 ILI9341_PAGE_ADDR & 0xff}, 271 /* 272 * Memory write control: When the transfer number of data exceeds 273 * (EC-SC+1)*(EP-SP+1), the column and page number will be 274 * reset, and the exceeding data will be written into the following 275 * column and page. 276 * Display Operation Mode: RGB Interface Mode 277 * Interface for RAM Access: RGB interface 278 * 16- bit RGB interface (1 transfer/pixel) 279 */ 280 .interface = {ILI9341_IF_WE_MODE, 0x00, 281 ILI9341_IF_DM_RGB | ILI9341_IF_RM_RGB}, 282 /* DPI: 16 bits / pixel */ 283 .pixel_format = ILI9341_PIXEL_DPI_16_BITS, 284 /* Curve Selected: Gamma curve 1 (G2.2) */ 285 .gamma_curve = ILI9341_GAMMA_CURVE_1, 286 .pgamma = {0x0f, 0x29, 0x24, 0x0c, 0x0e, 287 0x09, 0x4e, 0x78, 0x3c, 0x09, 288 0x13, 0x05, 0x17, 0x11, 0x00}, 289 .ngamma = {0x00, 0x16, 0x1b, 0x04, 0x11, 290 0x07, 0x31, 0x33, 0x42, 0x05, 291 0x0c, 0x0a, 0x28, 0x2f, 0x0f}, 292 }; 293 294 static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel) 295 { 296 return container_of(panel, struct ili9341, panel); 297 } 298 299 static void ili9341_dpi_init(struct ili9341 *ili) 300 { 301 struct device *dev = (&ili->panel)->dev; 302 struct mipi_dbi *dbi = ili->dbi; 303 struct ili9341_config *cfg = (struct ili9341_config *)ili->conf; 304 305 /* Power Control */ 306 mipi_dbi_command_stackbuf(dbi, 0xca, cfg->ca, ILI9341_CA_LEN); 307 mipi_dbi_command_stackbuf(dbi, ILI9341_POWERB, cfg->power_b, 308 ILI9341_POWER_B_LEN); 309 mipi_dbi_command_stackbuf(dbi, ILI9341_POWER_SEQ, cfg->power_seq, 310 ILI9341_POWER_SEQ_LEN); 311 mipi_dbi_command_stackbuf(dbi, ILI9341_DTCA, cfg->dtca, 312 ILI9341_DTCA_LEN); 313 mipi_dbi_command_stackbuf(dbi, ILI9341_POWERA, cfg->power_a, 314 ILI9341_POWER_A_LEN); 315 mipi_dbi_command(ili->dbi, ILI9341_PRC, cfg->prc); 316 mipi_dbi_command_stackbuf(dbi, ILI9341_DTCB, cfg->dtcb, 317 ILI9341_DTCB_LEN); 318 mipi_dbi_command_stackbuf(dbi, ILI9341_FRC, cfg->frc, ILI9341_FRC_LEN); 319 mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_1, 320 ILI9341_DFC_1_LEN); 321 mipi_dbi_command(dbi, ILI9341_POWER1, cfg->power_1); 322 mipi_dbi_command(dbi, ILI9341_POWER2, cfg->power_2); 323 324 /* VCOM */ 325 mipi_dbi_command_stackbuf(dbi, ILI9341_VCOM1, cfg->vcom_1, 326 ILI9341_VCOM_1_LEN); 327 mipi_dbi_command(dbi, ILI9341_VCOM2, cfg->vcom_2); 328 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, cfg->address_mode); 329 330 /* Gamma */ 331 mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, cfg->g3amma_en); 332 mipi_dbi_command(dbi, ILI9341_RGB_INTERFACE, cfg->rgb_interface); 333 mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_2, 334 ILI9341_DFC_2_LEN); 335 336 /* Colomn address set */ 337 mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_COLUMN_ADDRESS, 338 cfg->column_addr, ILI9341_COLUMN_ADDR_LEN); 339 340 /* Page address set */ 341 mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_PAGE_ADDRESS, 342 cfg->page_addr, ILI9341_PAGE_ADDR_LEN); 343 mipi_dbi_command_stackbuf(dbi, ILI9341_INTERFACE, cfg->interface, 344 ILI9341_INTERFACE_LEN); 345 346 /* Format */ 347 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, cfg->pixel_format); 348 mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START); 349 msleep(200); 350 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, cfg->gamma_curve); 351 mipi_dbi_command_stackbuf(dbi, ILI9341_PGAMMA, cfg->pgamma, 352 ILI9341_PGAMMA_LEN); 353 mipi_dbi_command_stackbuf(dbi, ILI9341_NGAMMA, cfg->ngamma, 354 ILI9341_NGAMMA_LEN); 355 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); 356 msleep(200); 357 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); 358 mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START); 359 360 dev_info(dev, "Initialized display rgb interface\n"); 361 } 362 363 static int ili9341_dpi_power_on(struct ili9341 *ili) 364 { 365 struct device *dev = (&ili->panel)->dev; 366 int ret = 0; 367 368 /* Assert RESET */ 369 gpiod_set_value(ili->reset_gpio, 1); 370 371 /* Enable power */ 372 ret = regulator_bulk_enable(ARRAY_SIZE(ili->supplies), 373 ili->supplies); 374 if (ret < 0) { 375 dev_err(dev, "unable to enable vcc\n"); 376 return ret; 377 } 378 msleep(20); 379 380 /* De-assert RESET */ 381 gpiod_set_value(ili->reset_gpio, 0); 382 msleep(20); 383 384 return 0; 385 } 386 387 static int ili9341_dpi_power_off(struct ili9341 *ili) 388 { 389 /* Assert RESET */ 390 gpiod_set_value(ili->reset_gpio, 1); 391 392 /* Disable power */ 393 return regulator_bulk_disable(ARRAY_SIZE(ili->supplies), 394 ili->supplies); 395 } 396 397 static int ili9341_dpi_disable(struct drm_panel *panel) 398 { 399 struct ili9341 *ili = panel_to_ili9341(panel); 400 401 mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_OFF); 402 return 0; 403 } 404 405 static int ili9341_dpi_unprepare(struct drm_panel *panel) 406 { 407 struct ili9341 *ili = panel_to_ili9341(panel); 408 409 return ili9341_dpi_power_off(ili); 410 } 411 412 static int ili9341_dpi_prepare(struct drm_panel *panel) 413 { 414 struct ili9341 *ili = panel_to_ili9341(panel); 415 int ret; 416 417 ret = ili9341_dpi_power_on(ili); 418 if (ret < 0) 419 return ret; 420 421 ili9341_dpi_init(ili); 422 423 return ret; 424 } 425 426 static int ili9341_dpi_enable(struct drm_panel *panel) 427 { 428 struct ili9341 *ili = panel_to_ili9341(panel); 429 430 mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_ON); 431 return 0; 432 } 433 434 static int ili9341_dpi_get_modes(struct drm_panel *panel, 435 struct drm_connector *connector) 436 { 437 struct ili9341 *ili = panel_to_ili9341(panel); 438 struct drm_device *drm = connector->dev; 439 struct drm_display_mode *mode; 440 struct drm_display_info *info; 441 442 info = &connector->display_info; 443 info->width_mm = ili->conf->mode.width_mm; 444 info->height_mm = ili->conf->mode.height_mm; 445 446 if (ili->conf->rgb_interface & ILI9341_RGB_DPL) 447 info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 448 else 449 info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 450 451 if (ili->conf->rgb_interface & ILI9341_RGB_EPL) 452 info->bus_flags |= DRM_BUS_FLAG_DE_LOW; 453 else 454 info->bus_flags |= DRM_BUS_FLAG_DE_HIGH; 455 456 mode = drm_mode_duplicate(drm, &ili->conf->mode); 457 if (!mode) { 458 drm_err(drm, "bad mode or failed to add mode\n"); 459 return -EINVAL; 460 } 461 drm_mode_set_name(mode); 462 463 /* Set up the polarity */ 464 if (ili->conf->rgb_interface & ILI9341_RGB_HSPL) 465 mode->flags |= DRM_MODE_FLAG_PHSYNC; 466 else 467 mode->flags |= DRM_MODE_FLAG_NHSYNC; 468 469 if (ili->conf->rgb_interface & ILI9341_RGB_VSPL) 470 mode->flags |= DRM_MODE_FLAG_PVSYNC; 471 else 472 mode->flags |= DRM_MODE_FLAG_NVSYNC; 473 474 drm_mode_probed_add(connector, mode); 475 476 return 1; /* Number of modes */ 477 } 478 479 static const struct drm_panel_funcs ili9341_dpi_funcs = { 480 .disable = ili9341_dpi_disable, 481 .unprepare = ili9341_dpi_unprepare, 482 .prepare = ili9341_dpi_prepare, 483 .enable = ili9341_dpi_enable, 484 .get_modes = ili9341_dpi_get_modes, 485 }; 486 487 static void ili9341_dbi_enable(struct drm_simple_display_pipe *pipe, 488 struct drm_crtc_state *crtc_state, 489 struct drm_plane_state *plane_state) 490 { 491 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); 492 struct mipi_dbi *dbi = &dbidev->dbi; 493 u8 addr_mode; 494 int ret, idx; 495 496 if (!drm_dev_enter(pipe->crtc.dev, &idx)) 497 return; 498 499 ret = mipi_dbi_poweron_conditional_reset(dbidev); 500 if (ret < 0) 501 goto out_exit; 502 if (ret == 1) 503 goto out_enable; 504 505 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); 506 507 mipi_dbi_command(dbi, ILI9341_POWERB, 0x00, 0xc1, 0x30); 508 mipi_dbi_command(dbi, ILI9341_POWER_SEQ, 0x64, 0x03, 0x12, 0x81); 509 mipi_dbi_command(dbi, ILI9341_DTCA, 0x85, 0x00, 0x78); 510 mipi_dbi_command(dbi, ILI9341_POWERA, 0x39, 0x2c, 0x00, 0x34, 0x02); 511 mipi_dbi_command(dbi, ILI9341_PRC, ILI9341_DBI_PRC_NORMAL); 512 mipi_dbi_command(dbi, ILI9341_DTCB, 0x00, 0x00); 513 514 /* Power Control */ 515 mipi_dbi_command(dbi, ILI9341_POWER1, ILI9341_DBI_VCOMH_4P6V); 516 mipi_dbi_command(dbi, ILI9341_POWER2, ILI9341_DBI_PWR_2_DEFAULT); 517 /* VCOM */ 518 mipi_dbi_command(dbi, ILI9341_VCOM1, ILI9341_DBI_VCOM_1_VMH_4P25V, 519 ILI9341_DBI_VCOM_1_VML_1P5V); 520 mipi_dbi_command(dbi, ILI9341_VCOM2, ILI9341_DBI_VCOM_2_DEC_58); 521 522 /* Memory Access Control */ 523 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, 524 MIPI_DCS_PIXEL_FMT_16BIT); 525 526 /* Frame Rate */ 527 mipi_dbi_command(dbi, ILI9341_FRC, ILI9341_DBI_FRC_DIVA & 0x03, 528 ILI9341_DBI_FRC_RTNA & 0x1f); 529 530 /* Gamma */ 531 mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, 0x00); 532 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, ILI9341_GAMMA_CURVE_1); 533 mipi_dbi_command(dbi, ILI9341_PGAMMA, 534 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1, 535 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00); 536 mipi_dbi_command(dbi, ILI9341_NGAMMA, 537 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1, 538 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f); 539 540 /* DDRAM */ 541 mipi_dbi_command(dbi, ILI9341_ETMOD, ILI9341_DBI_EMS_GAS | 542 ILI9341_DBI_EMS_DTS | 543 ILI9341_DBI_EMS_GON); 544 545 /* Display */ 546 mipi_dbi_command(dbi, ILI9341_DFC, 0x08, 0x82, 0x27, 0x00); 547 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); 548 msleep(100); 549 550 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); 551 msleep(100); 552 553 out_enable: 554 switch (dbidev->rotation) { 555 default: 556 addr_mode = ILI9341_MADCTL_MX; 557 break; 558 case 90: 559 addr_mode = ILI9341_MADCTL_MV; 560 break; 561 case 180: 562 addr_mode = ILI9341_MADCTL_MY; 563 break; 564 case 270: 565 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | 566 ILI9341_MADCTL_MX; 567 break; 568 } 569 570 addr_mode |= ILI9341_MADCTL_BGR; 571 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); 572 mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); 573 drm_info(&dbidev->drm, "Initialized display serial interface\n"); 574 out_exit: 575 drm_dev_exit(idx); 576 } 577 578 static const struct drm_simple_display_pipe_funcs ili9341_dbi_funcs = { 579 .mode_valid = mipi_dbi_pipe_mode_valid, 580 .enable = ili9341_dbi_enable, 581 .disable = mipi_dbi_pipe_disable, 582 .update = mipi_dbi_pipe_update, 583 .prepare_fb = drm_gem_simple_display_pipe_prepare_fb, 584 }; 585 586 static const struct drm_display_mode ili9341_dbi_mode = { 587 DRM_SIMPLE_MODE(240, 320, 37, 49), 588 }; 589 590 DEFINE_DRM_GEM_DMA_FOPS(ili9341_dbi_fops); 591 592 static struct drm_driver ili9341_dbi_driver = { 593 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 594 .fops = &ili9341_dbi_fops, 595 DRM_GEM_DMA_DRIVER_OPS_VMAP, 596 .debugfs_init = mipi_dbi_debugfs_init, 597 .name = "ili9341", 598 .desc = "Ilitek ILI9341", 599 .date = "20210716", 600 .major = 1, 601 .minor = 0, 602 }; 603 604 static int ili9341_dbi_probe(struct spi_device *spi, struct gpio_desc *dc, 605 struct gpio_desc *reset) 606 { 607 struct device *dev = &spi->dev; 608 struct mipi_dbi_dev *dbidev; 609 struct mipi_dbi *dbi; 610 struct drm_device *drm; 611 struct regulator *vcc; 612 u32 rotation = 0; 613 int ret; 614 615 vcc = devm_regulator_get_optional(dev, "vcc"); 616 if (IS_ERR(vcc)) { 617 dev_err(dev, "get optional vcc failed\n"); 618 vcc = NULL; 619 } 620 621 dbidev = devm_drm_dev_alloc(dev, &ili9341_dbi_driver, 622 struct mipi_dbi_dev, drm); 623 if (IS_ERR(dbidev)) 624 return PTR_ERR(dbidev); 625 626 dbi = &dbidev->dbi; 627 drm = &dbidev->drm; 628 dbi->reset = reset; 629 dbidev->regulator = vcc; 630 631 drm_mode_config_init(drm); 632 633 dbidev->backlight = devm_of_find_backlight(dev); 634 if (IS_ERR(dbidev->backlight)) 635 return PTR_ERR(dbidev->backlight); 636 637 device_property_read_u32(dev, "rotation", &rotation); 638 639 ret = mipi_dbi_spi_init(spi, dbi, dc); 640 if (ret) 641 return ret; 642 643 ret = mipi_dbi_dev_init(dbidev, &ili9341_dbi_funcs, 644 &ili9341_dbi_mode, rotation); 645 if (ret) 646 return ret; 647 648 drm_mode_config_reset(drm); 649 650 ret = drm_dev_register(drm, 0); 651 if (ret) 652 return ret; 653 654 spi_set_drvdata(spi, drm); 655 656 drm_fbdev_generic_setup(drm, 0); 657 658 return 0; 659 } 660 661 static int ili9341_dpi_probe(struct spi_device *spi, struct gpio_desc *dc, 662 struct gpio_desc *reset) 663 { 664 struct device *dev = &spi->dev; 665 struct ili9341 *ili; 666 int ret; 667 668 ili = devm_kzalloc(dev, sizeof(struct ili9341), GFP_KERNEL); 669 if (!ili) 670 return -ENOMEM; 671 672 ili->dbi = devm_kzalloc(dev, sizeof(struct mipi_dbi), 673 GFP_KERNEL); 674 if (!ili->dbi) 675 return -ENOMEM; 676 677 ili->supplies[0].supply = "vci"; 678 ili->supplies[1].supply = "vddi"; 679 ili->supplies[2].supply = "vddi-led"; 680 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ili->supplies), 681 ili->supplies); 682 if (ret < 0) { 683 dev_err(dev, "failed to get regulators: %d\n", ret); 684 return ret; 685 } 686 687 ret = mipi_dbi_spi_init(spi, ili->dbi, dc); 688 if (ret) 689 return ret; 690 691 spi_set_drvdata(spi, ili); 692 ili->reset_gpio = reset; 693 /* 694 * Every new incarnation of this display must have a unique 695 * data entry for the system in this driver. 696 */ 697 ili->conf = of_device_get_match_data(dev); 698 if (!ili->conf) { 699 dev_err(dev, "missing device configuration\n"); 700 return -ENODEV; 701 } 702 703 ili->max_spi_speed = ili->conf->max_spi_speed; 704 drm_panel_init(&ili->panel, dev, &ili9341_dpi_funcs, 705 DRM_MODE_CONNECTOR_DPI); 706 drm_panel_add(&ili->panel); 707 708 return 0; 709 } 710 711 static int ili9341_probe(struct spi_device *spi) 712 { 713 struct device *dev = &spi->dev; 714 struct gpio_desc *dc; 715 struct gpio_desc *reset; 716 const struct spi_device_id *id = spi_get_device_id(spi); 717 718 reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 719 if (IS_ERR(reset)) 720 dev_err(dev, "Failed to get gpio 'reset'\n"); 721 722 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); 723 if (IS_ERR(dc)) 724 dev_err(dev, "Failed to get gpio 'dc'\n"); 725 726 if (!strcmp(id->name, "sf-tc240t-9370-t")) 727 return ili9341_dpi_probe(spi, dc, reset); 728 else if (!strcmp(id->name, "yx240qv29")) 729 return ili9341_dbi_probe(spi, dc, reset); 730 731 return -1; 732 } 733 734 static void ili9341_remove(struct spi_device *spi) 735 { 736 const struct spi_device_id *id = spi_get_device_id(spi); 737 struct ili9341 *ili = spi_get_drvdata(spi); 738 struct drm_device *drm = spi_get_drvdata(spi); 739 740 if (!strcmp(id->name, "sf-tc240t-9370-t")) { 741 ili9341_dpi_power_off(ili); 742 drm_panel_remove(&ili->panel); 743 } else if (!strcmp(id->name, "yx240qv29")) { 744 drm_dev_unplug(drm); 745 drm_atomic_helper_shutdown(drm); 746 } 747 } 748 749 static void ili9341_shutdown(struct spi_device *spi) 750 { 751 const struct spi_device_id *id = spi_get_device_id(spi); 752 753 if (!strcmp(id->name, "yx240qv29")) 754 drm_atomic_helper_shutdown(spi_get_drvdata(spi)); 755 } 756 757 static const struct of_device_id ili9341_of_match[] = { 758 { 759 .compatible = "st,sf-tc240t-9370-t", 760 .data = &ili9341_stm32f429_disco_data, 761 }, 762 { 763 /* porting from tiny/ili9341.c 764 * for original mipi dbi compitable 765 */ 766 .compatible = "adafruit,yx240qv29", 767 .data = NULL, 768 }, 769 { } 770 }; 771 MODULE_DEVICE_TABLE(of, ili9341_of_match); 772 773 static const struct spi_device_id ili9341_id[] = { 774 { "yx240qv29", 0 }, 775 { "sf-tc240t-9370-t", 0 }, 776 { } 777 }; 778 MODULE_DEVICE_TABLE(spi, ili9341_id); 779 780 static struct spi_driver ili9341_driver = { 781 .probe = ili9341_probe, 782 .remove = ili9341_remove, 783 .shutdown = ili9341_shutdown, 784 .id_table = ili9341_id, 785 .driver = { 786 .name = "panel-ilitek-ili9341", 787 .of_match_table = ili9341_of_match, 788 }, 789 }; 790 module_spi_driver(ili9341_driver); 791 792 MODULE_AUTHOR("Dillon Min <dillon.minfei@gmail.com>"); 793 MODULE_DESCRIPTION("ILI9341 LCD panel driver"); 794 MODULE_LICENSE("GPL v2"); 795