1 // SPDX-License-Identifier: GPL-2.0
3  * Magnachip d53e6ea8966 MIPI-DSI panel driver
18 #include <linux/media-bus-format.h>
22 #include <linux/spi/spi.h>
29 /* Panel info, unique to each panel */
35 	/** @width_mm: panel width in mm */
37 	/** @height_mm: panel height in mm */
39 	/** @bus_flags: drm bus flags for panel */
41 	/** @panel_init_seq: panel specific init sequence */
43 	/** @backlight_register: panel backlight registration or NULL */
50 	/** @dbi: the DBI bus abstraction handle */
51 	struct mipi_dbi dbi;  member
52 	/** @panel: the DRM panel instance for this device */
53 	struct drm_panel panel;  member
58 	/** @reg_vdd: VDD supply regulator for panel logic */
60 	/** @reg_elvdd: ELVDD supply regulator for panel display */
62 	/** @dsi_dev: DSI child device (panel) */
64 	/** @bl_dev: pseudo-backlight device for oled panel */
66 	/** @panel_info: struct containing panel timing and info */
72 #define MAX_BRIGHTNESS		(NUM_GAMMA_LEVELS - 1)
84 static inline struct d53e6ea8966 *to_d53e6ea8966(struct drm_panel *panel)  in to_d53e6ea8966()  argument
86 	return container_of(panel, struct d53e6ea8966, panel);  in to_d53e6ea8966()
150 static int ams495qa01_update_gamma(struct mipi_dbi *dbi, int brightness)  in ams495qa01_update_gamma()  argument
154 	mipi_dbi_command_buf(dbi, MCS_SET_GAMMA, ams495qa01_gamma[tmp],  in ams495qa01_update_gamma()
156 	mipi_dbi_command(dbi, MCS_SET_GAMMA, 0x00);  in ams495qa01_update_gamma()
159 	mipi_dbi_command(dbi, 0x26, 0x00);  in ams495qa01_update_gamma()
161 	mipi_dbi_command(dbi, MCS_TEMP_SWIRE, ams495qa01_elvss[tmp]);  in ams495qa01_update_gamma()
168 	struct mipi_dbi *dbi = &db->dbi;  in ams495qa01_panel_init()  local
170 	mipi_dbi_command(dbi, MCS_PASSWORD_0, 0x5a, 0x5a);  in ams495qa01_panel_init()
171 	mipi_dbi_command(dbi, MCS_PASSWORD_1, 0x5a, 0x5a);  in ams495qa01_panel_init()
174 	mipi_dbi_command(dbi, 0xb0, 0x02);  in ams495qa01_panel_init()
175 	mipi_dbi_command(dbi, 0xf3, 0x3b);  in ams495qa01_panel_init()
177 	mipi_dbi_command(dbi, MCS_ANALOG_PWR_CTL_0, 0x33, 0x42, 0x00, 0x08);  in ams495qa01_panel_init()
178 	mipi_dbi_command(dbi, MCS_ANALOG_PWR_CTL_1, 0x00, 0x06, 0x26, 0x35, 0x03);  in ams495qa01_panel_init()
181 	mipi_dbi_command(dbi, 0xf6, 0x02);  in ams495qa01_panel_init()
182 	mipi_dbi_command(dbi, 0xc6, 0x0b, 0x00, 0x00, 0x3c, 0x00, 0x22,  in ams495qa01_panel_init()
185 	mipi_dbi_command(dbi, MCS_GTCON_SET, 0x20);  in ams495qa01_panel_init()
186 	mipi_dbi_command(dbi, MCS_TEMP_SWIRE, 0x06, 0x06, 0x06, 0x06);  in ams495qa01_panel_init()
187 	mipi_dbi_command(dbi, MCS_ELVSS_ON, 0x07, 0x00, 0x10);  in ams495qa01_panel_init()
188 	mipi_dbi_command(dbi, MCS_GATELESS_SIGNAL_SET, 0x7f, 0x7a,  in ams495qa01_panel_init()
194 	mipi_dbi_command(dbi, 0xb5, 0xff, 0xef, 0x35, 0x42, 0x0d, 0xd7,  in ams495qa01_panel_init()
198 	mipi_dbi_command(dbi, 0xb4, 0x15);  in ams495qa01_panel_init()
199 	mipi_dbi_command(dbi, 0xb3, 0x00);  in ams495qa01_panel_init()
201 	ams495qa01_update_gamma(dbi, MAX_BRIGHTNESS);  in ams495qa01_panel_init()
204 static int d53e6ea8966_prepare(struct drm_panel *panel)  in d53e6ea8966_prepare()  argument
206 	struct d53e6ea8966 *db = to_d53e6ea8966(panel);  in d53e6ea8966_prepare()
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()
243 static int d53e6ea8966_enable(struct drm_panel *panel)  in d53e6ea8966_enable()  argument
245 	struct d53e6ea8966 *db = to_d53e6ea8966(panel);  in d53e6ea8966_enable()
246 	struct mipi_dbi *dbi = &db->dbi;  in d53e6ea8966_enable()  local
248 	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);  in d53e6ea8966_enable()
250 	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);  in d53e6ea8966_enable()
256 static int d53e6ea8966_disable(struct drm_panel *panel)  in d53e6ea8966_disable()  argument
258 	struct d53e6ea8966 *db = to_d53e6ea8966(panel);  in d53e6ea8966_disable()
259 	struct mipi_dbi *dbi = &db->dbi;  in d53e6ea8966_disable()  local
261 	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);  in d53e6ea8966_disable()
263 	mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);  in d53e6ea8966_disable()
269 static int d53e6ea8966_unprepare(struct drm_panel *panel)  in d53e6ea8966_unprepare()  argument
271 	struct d53e6ea8966 *db = to_d53e6ea8966(panel);  in d53e6ea8966_unprepare()
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()
287 static int d53e6ea8966_get_modes(struct drm_panel *panel,  in d53e6ea8966_get_modes()  argument
290 	struct d53e6ea8966 *db = to_d53e6ea8966(panel);  in d53e6ea8966_get_modes()
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()  local
331 	ams495qa01_update_gamma(dbi, brightness);  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()
361 static int d53e6ea8966_probe(struct spi_device *spi)  in d53e6ea8966_probe()  argument
363 	struct device *dev = &spi->dev;  in d53e6ea8966_probe()
375 		return -ENOMEM;  in d53e6ea8966_probe()
377 	spi_set_drvdata(spi, db);  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()
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()
408 		return dev_err_probe(dev, ret, "MIPI DBI init failed\n");  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()
450 static void d53e6ea8966_remove(struct spi_device *spi)  in d53e6ea8966_remove()  argument
452 	struct d53e6ea8966 *db = spi_get_drvdata(spi);  in d53e6ea8966_remove()
454 	drm_panel_remove(&db->panel);  in d53e6ea8966_remove()
506 MODULE_DEVICE_TABLE(spi, d53e6ea8966_ids);
510 		.name	= "d53e6ea8966-panel",
520 MODULE_DESCRIPTION("Magnachip d53e6ea8966 panel driver");