1 // SPDX-License-Identifier: GPL-2.0
3  * Magnachip d53e6ea8966 MIPI-DSI panel driver
18 #include <linux/media-bus-format.h>
58 	/** @reg_vdd: VDD supply regulator for panel logic */
60 	/** @reg_elvdd: ELVDD supply regulator for panel display */
64 	/** @bl_dev: pseudo-backlight device for oled panel */
72 #define MAX_BRIGHTNESS		(NUM_GAMMA_LEVELS - 1)
142  * Table of elvss values provided in datasheet and corresponds to
168 	struct mipi_dbi *dbi = &db->dbi;  in ams495qa01_panel_init()
210 	ret = regulator_enable(db->reg_vdd);  in d53e6ea8966_prepare()
212 		dev_err(db->dev, "failed to enable vdd regulator: %d\n", ret);  in d53e6ea8966_prepare()
216 	if (db->reg_elvdd) {  in d53e6ea8966_prepare()
217 		ret = regulator_enable(db->reg_elvdd);  in d53e6ea8966_prepare()
219 			dev_err(db->dev,  in d53e6ea8966_prepare()
221 			regulator_disable(db->reg_vdd);  in d53e6ea8966_prepare()
227 	if (db->enable)  in d53e6ea8966_prepare()
228 		gpiod_set_value_cansleep(db->enable, 1);  in d53e6ea8966_prepare()
233 	gpiod_set_value_cansleep(db->reset, 1);  in d53e6ea8966_prepare()
235 	gpiod_set_value_cansleep(db->reset, 0);  in d53e6ea8966_prepare()
238 	db->panel_info->panel_init_seq(db);  in d53e6ea8966_prepare()
246 	struct mipi_dbi *dbi = &db->dbi;  in d53e6ea8966_enable()
259 	struct mipi_dbi *dbi = &db->dbi;  in d53e6ea8966_disable()
273 	if (db->enable)  in d53e6ea8966_unprepare()
274 		gpiod_set_value_cansleep(db->enable, 0);  in d53e6ea8966_unprepare()
276 	gpiod_set_value_cansleep(db->reset, 1);  in d53e6ea8966_unprepare()
278 	if (db->reg_elvdd)  in d53e6ea8966_unprepare()
279 		regulator_disable(db->reg_elvdd);  in d53e6ea8966_unprepare()
281 	regulator_disable(db->reg_vdd);  in d53e6ea8966_unprepare()
291 	const struct d53e6ea8966_panel_info *panel_info = db->panel_info;  in d53e6ea8966_get_modes()
296 	for (i = 0; i < panel_info->num_modes; i++) {  in d53e6ea8966_get_modes()
297 		mode = drm_mode_duplicate(connector->dev,  in d53e6ea8966_get_modes()
298 					  &panel_info->display_modes[i]);  in d53e6ea8966_get_modes()
300 			return -ENOMEM;  in d53e6ea8966_get_modes()
306 	connector->display_info.bpc = 8;  in d53e6ea8966_get_modes()
307 	connector->display_info.width_mm = panel_info->width_mm;  in d53e6ea8966_get_modes()
308 	connector->display_info.height_mm = panel_info->height_mm;  in d53e6ea8966_get_modes()
309 	connector->display_info.bus_flags = panel_info->bus_flags;  in d53e6ea8966_get_modes()
311 	drm_display_info_set_bus_formats(&connector->display_info,  in d53e6ea8966_get_modes()
328 	struct mipi_dbi *dbi = &db->dbi;  in ams495qa01_set_brightness()
347 	struct device *dev = db->dev;  in ams495qa01_backlight_register()
350 	db->bl_dev = devm_backlight_device_register(dev, "panel", dev, db,  in ams495qa01_backlight_register()
353 	if (IS_ERR(db->bl_dev)) {  in ams495qa01_backlight_register()
354 		ret = PTR_ERR(db->bl_dev);  in ams495qa01_backlight_register()
363 	struct device *dev = &spi->dev;  in d53e6ea8966_probe()
375 		return -ENOMEM;  in d53e6ea8966_probe()
379 	db->dev = dev;  in d53e6ea8966_probe()
381 	db->panel_info = of_device_get_match_data(dev);  in d53e6ea8966_probe()
382 	if (!db->panel_info)  in d53e6ea8966_probe()
383 		return -EINVAL;  in d53e6ea8966_probe()
385 	db->reg_vdd = devm_regulator_get(dev, "vdd");  in d53e6ea8966_probe()
386 	if (IS_ERR(db->reg_vdd))  in d53e6ea8966_probe()
387 		return dev_err_probe(dev, PTR_ERR(db->reg_vdd),  in d53e6ea8966_probe()
388 				     "Failed to get vdd supply\n");  in d53e6ea8966_probe()
390 	db->reg_elvdd = devm_regulator_get_optional(dev, "elvdd");  in d53e6ea8966_probe()
391 	if (IS_ERR(db->reg_elvdd))  in d53e6ea8966_probe()
392 		db->reg_elvdd = NULL;  in d53e6ea8966_probe()
394 	db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in d53e6ea8966_probe()
395 	if (IS_ERR(db->reset)) {  in d53e6ea8966_probe()
396 		ret = PTR_ERR(db->reset);  in d53e6ea8966_probe()
400 	db->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);  in d53e6ea8966_probe()
401 	if (IS_ERR(db->enable)) {  in d53e6ea8966_probe()
402 		ret = PTR_ERR(db->enable);  in d53e6ea8966_probe()
406 	ret = mipi_dbi_spi_init(spi, &db->dbi, NULL);  in d53e6ea8966_probe()
416 	db->dsi_dev = devm_mipi_dsi_device_register_full(dev, dsi_host, &info);  in d53e6ea8966_probe()
417 	if (IS_ERR(db->dsi_dev)) {  in d53e6ea8966_probe()
419 			PTR_ERR(db->dsi_dev));  in d53e6ea8966_probe()
420 		return PTR_ERR(db->dsi_dev);  in d53e6ea8966_probe()
423 	db->dsi_dev->lanes = 2;  in d53e6ea8966_probe()
424 	db->dsi_dev->format = MIPI_DSI_FMT_RGB888;  in d53e6ea8966_probe()
425 	db->dsi_dev->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |  in d53e6ea8966_probe()
428 	drm_panel_init(&db->panel, dev, &d53e6ea8966_panel_funcs,  in d53e6ea8966_probe()
431 	if (db->panel_info->backlight_register) {  in d53e6ea8966_probe()
432 		ret = db->panel_info->backlight_register(db);  in d53e6ea8966_probe()
435 		db->panel.backlight = db->bl_dev;  in d53e6ea8966_probe()
438 	drm_panel_add(&db->panel);  in d53e6ea8966_probe()
440 	ret = devm_mipi_dsi_attach(dev, db->dsi_dev);  in d53e6ea8966_probe()
443 		drm_panel_remove(&db->panel);  in d53e6ea8966_probe()
454 	drm_panel_remove(&db->panel);  in d53e6ea8966_remove()
510 		.name	= "d53e6ea8966-panel",