1 // SPDX-License-Identifier: GPL-2.0-only
6  * - 16-bit parallel RGB interface
7  * - 18-bit parallel RGB interface
8  * - 4-line serial spi interface
13  * Derived from drivers/drm/gpu/panel/panel-ilitek-ili9322.c
114 /* struct ili9341_config - the system specific ILI9341 configuration */
187  * The Stm32f429-disco board has a panel ili9341 connected to ltdc controller
217 	 * 0xa2 Normally white, G1 -> G320, S720 -> S1,
218 	 *	Scan Cycle 5 frames,85ms
223 	/* 0x10 AVDD=vci*2, VGH=vci*7, VGL=-vci*4 */
225 	/* 0x45 VCOMH 4.425v, 0x15 VCOML -1.975*/
227 	/* 0x90 offset voltage, VMH-48, VML-48 */
246 	 * Gate outputs in non-display area: Interval scan
247 	 * Determine source/VCOM output in a non-display area in the partial
252 	 * fFLM = 60Hz: 255ms
254 	 * Gate Output Scan Direction: G1 -> G320
255 	 * Source Output Scan Direction: S720 -> S1
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
277 	 * 16- bit RGB interface (1 transfer/pixel)
300 	struct device *dev = (&ili->panel)->dev;  in ili9341_dpi_init()
301 	struct mipi_dbi *dbi = ili->dbi;  in ili9341_dpi_init()
302 	struct ili9341_config *cfg = (struct ili9341_config *)ili->conf;  in ili9341_dpi_init()
305 	mipi_dbi_command_stackbuf(dbi, 0xca, cfg->ca, ILI9341_CA_LEN);  in ili9341_dpi_init()
306 	mipi_dbi_command_stackbuf(dbi, ILI9341_POWERB, cfg->power_b,  in ili9341_dpi_init()
308 	mipi_dbi_command_stackbuf(dbi, ILI9341_POWER_SEQ, cfg->power_seq,  in ili9341_dpi_init()
310 	mipi_dbi_command_stackbuf(dbi, ILI9341_DTCA, cfg->dtca,  in ili9341_dpi_init()
312 	mipi_dbi_command_stackbuf(dbi, ILI9341_POWERA, cfg->power_a,  in ili9341_dpi_init()
314 	mipi_dbi_command(ili->dbi, ILI9341_PRC, cfg->prc);  in ili9341_dpi_init()
315 	mipi_dbi_command_stackbuf(dbi, ILI9341_DTCB, cfg->dtcb,  in ili9341_dpi_init()
317 	mipi_dbi_command_stackbuf(dbi, ILI9341_FRC, cfg->frc, ILI9341_FRC_LEN);  in ili9341_dpi_init()
318 	mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_1,  in ili9341_dpi_init()
320 	mipi_dbi_command(dbi, ILI9341_POWER1, cfg->power_1);  in ili9341_dpi_init()
321 	mipi_dbi_command(dbi, ILI9341_POWER2, cfg->power_2);  in ili9341_dpi_init()
324 	mipi_dbi_command_stackbuf(dbi, ILI9341_VCOM1, cfg->vcom_1,  in ili9341_dpi_init()
326 	mipi_dbi_command(dbi, ILI9341_VCOM2, cfg->vcom_2);  in ili9341_dpi_init()
327 	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, cfg->address_mode);  in ili9341_dpi_init()
330 	mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, cfg->g3amma_en);  in ili9341_dpi_init()
331 	mipi_dbi_command(dbi, ILI9341_RGB_INTERFACE, cfg->rgb_interface);  in ili9341_dpi_init()
332 	mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_2,  in ili9341_dpi_init()
337 				  cfg->column_addr, ILI9341_COLUMN_ADDR_LEN);  in ili9341_dpi_init()
341 				  cfg->page_addr, ILI9341_PAGE_ADDR_LEN);  in ili9341_dpi_init()
342 	mipi_dbi_command_stackbuf(dbi, ILI9341_INTERFACE, cfg->interface,  in ili9341_dpi_init()
346 	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, cfg->pixel_format);  in ili9341_dpi_init()
349 	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, cfg->gamma_curve);  in ili9341_dpi_init()
350 	mipi_dbi_command_stackbuf(dbi, ILI9341_PGAMMA, cfg->pgamma,  in ili9341_dpi_init()
352 	mipi_dbi_command_stackbuf(dbi, ILI9341_NGAMMA, cfg->ngamma,  in ili9341_dpi_init()
364 	struct device *dev = (&ili->panel)->dev;  in ili9341_dpi_power_on()
367 	/* Assert RESET */  in ili9341_dpi_power_on()
368 	gpiod_set_value(ili->reset_gpio, 1);  in ili9341_dpi_power_on()
371 	ret = regulator_bulk_enable(ARRAY_SIZE(ili->supplies),  in ili9341_dpi_power_on()
372 				    ili->supplies);  in ili9341_dpi_power_on()
379 	/* De-assert RESET */  in ili9341_dpi_power_on()
380 	gpiod_set_value(ili->reset_gpio, 0);  in ili9341_dpi_power_on()
388 	/* Assert RESET */  in ili9341_dpi_power_off()
389 	gpiod_set_value(ili->reset_gpio, 1);  in ili9341_dpi_power_off()
392 	return regulator_bulk_disable(ARRAY_SIZE(ili->supplies),  in ili9341_dpi_power_off()
393 				      ili->supplies);  in ili9341_dpi_power_off()
400 	mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_OFF);  in ili9341_dpi_disable()
429 	mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_ON);  in ili9341_dpi_enable()
437 	struct drm_device *drm = connector->dev;  in ili9341_dpi_get_modes()
441 	info = &connector->display_info;  in ili9341_dpi_get_modes()
442 	info->width_mm = ili->conf->mode.width_mm;  in ili9341_dpi_get_modes()
443 	info->height_mm = ili->conf->mode.height_mm;  in ili9341_dpi_get_modes()
445 	if (ili->conf->rgb_interface & ILI9341_RGB_DPL)  in ili9341_dpi_get_modes()
446 		info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;  in ili9341_dpi_get_modes()
448 		info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;  in ili9341_dpi_get_modes()
450 	if (ili->conf->rgb_interface & ILI9341_RGB_EPL)  in ili9341_dpi_get_modes()
451 		info->bus_flags |= DRM_BUS_FLAG_DE_LOW;  in ili9341_dpi_get_modes()
453 		info->bus_flags |= DRM_BUS_FLAG_DE_HIGH;  in ili9341_dpi_get_modes()
455 	mode = drm_mode_duplicate(drm, &ili->conf->mode);  in ili9341_dpi_get_modes()
458 		return -EINVAL;  in ili9341_dpi_get_modes()
463 	if (ili->conf->rgb_interface & ILI9341_RGB_HSPL)  in ili9341_dpi_get_modes()
464 		mode->flags |= DRM_MODE_FLAG_PHSYNC;  in ili9341_dpi_get_modes()
466 		mode->flags |= DRM_MODE_FLAG_NHSYNC;  in ili9341_dpi_get_modes()
468 	if (ili->conf->rgb_interface & ILI9341_RGB_VSPL)  in ili9341_dpi_get_modes()
469 		mode->flags |= DRM_MODE_FLAG_PVSYNC;  in ili9341_dpi_get_modes()
471 		mode->flags |= DRM_MODE_FLAG_NVSYNC;  in ili9341_dpi_get_modes()
487 			     struct gpio_desc *reset)  in ili9341_dpi_probe()  argument
489 	struct device *dev = &spi->dev;  in ili9341_dpi_probe()
495 		return -ENOMEM;  in ili9341_dpi_probe()
497 	ili->dbi = devm_kzalloc(dev, sizeof(struct mipi_dbi),  in ili9341_dpi_probe()
499 	if (!ili->dbi)  in ili9341_dpi_probe()
500 		return -ENOMEM;  in ili9341_dpi_probe()
502 	ili->supplies[0].supply = "vci";  in ili9341_dpi_probe()
503 	ili->supplies[1].supply = "vddi";  in ili9341_dpi_probe()
504 	ili->supplies[2].supply = "vddi-led";  in ili9341_dpi_probe()
505 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ili->supplies),  in ili9341_dpi_probe()
506 				      ili->supplies);  in ili9341_dpi_probe()
512 	ret = mipi_dbi_spi_init(spi, ili->dbi, dc);  in ili9341_dpi_probe()
517 	ili->reset_gpio = reset;  in ili9341_dpi_probe()
522 	ili->conf = device_get_match_data(dev);  in ili9341_dpi_probe()
523 	if (!ili->conf) {  in ili9341_dpi_probe()
525 		return -ENODEV;  in ili9341_dpi_probe()
528 	ili->max_spi_speed = ili->conf->max_spi_speed;  in ili9341_dpi_probe()
529 	drm_panel_init(&ili->panel, dev, &ili9341_dpi_funcs,  in ili9341_dpi_probe()
531 	drm_panel_add(&ili->panel);  in ili9341_dpi_probe()
538 	struct device *dev = &spi->dev;  in ili9341_probe()
540 	struct gpio_desc *reset;  in ili9341_probe()  local
542 	reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);  in ili9341_probe()
543 	if (IS_ERR(reset))  in ili9341_probe()
544 		return dev_err_probe(dev, PTR_ERR(reset), "Failed to get gpio 'reset'\n");  in ili9341_probe()
550 	return ili9341_dpi_probe(spi, dc, reset);  in ili9341_probe()
558 	drm_panel_remove(&ili->panel);  in ili9341_remove()
563 		.compatible = "st,sf-tc240t-9370-t",
571 	{ "sf-tc240t-9370-t", 0 },
581 		.name = "panel-ilitek-ili9341",