1 // SPDX-License-Identifier: GPL-2.0
5  * Found in the Samsung Galaxy Beam GT-I8350 mobile phone.
16 #include <linux/media-bus-format.h>
49  * struct db7430 - state container for a panel controlled by the DB7430
89 static int db7430_power_on(struct db7430 *db)  in db7430_power_on()  argument
91 	struct mipi_dbi *dbi = &db->dbi;  in db7430_power_on()
95 	ret = regulator_bulk_enable(ARRAY_SIZE(db->regulators),  in db7430_power_on()
96 				    db->regulators);  in db7430_power_on()
98 		dev_err(db->dev, "failed to enable regulators: %d\n", ret);  in db7430_power_on()
104 	gpiod_set_value_cansleep(db->reset, 1);  in db7430_power_on()
106 	/* De-assert reset */  in db7430_power_on()
107 	gpiod_set_value_cansleep(db->reset, 0);  in db7430_power_on()
110 	dev_dbg(db->dev, "de-asserted RESET\n");  in db7430_power_on()
164 static int db7430_power_off(struct db7430 *db)  in db7430_power_off()  argument
167 	gpiod_set_value_cansleep(db->reset, 1);  in db7430_power_off()
168 	return regulator_bulk_disable(ARRAY_SIZE(db->regulators),  in db7430_power_off()
169 				      db->regulators);  in db7430_power_off()
179 	struct db7430 *db = to_db7430(panel);  in db7430_disable()  local
180 	struct mipi_dbi *dbi = &db->dbi;  in db7430_disable()
185 	msleep(120);  in db7430_disable()
197 	struct db7430 *db = to_db7430(panel);  in db7430_enable()  local
198 	struct mipi_dbi *dbi = &db->dbi;  in db7430_enable()
204 	/* NVM (non-volatile memory) load sequence */  in db7430_enable()
223  * db7430_get_modes() - return the mode
230 	struct db7430 *db = to_db7430(panel);  in db7430_get_modes()  local
234 	mode = drm_mode_duplicate(connector->dev, &db7430_480_800_mode);  in db7430_get_modes()
236 		dev_err(db->dev, "failed to add mode\n");  in db7430_get_modes()
237 		return -ENOMEM;  in db7430_get_modes()
240 	connector->display_info.bpc = 8;  in db7430_get_modes()
241 	connector->display_info.width_mm = mode->width_mm;  in db7430_get_modes()
242 	connector->display_info.height_mm = mode->height_mm;  in db7430_get_modes()
243 	connector->display_info.bus_flags =  in db7430_get_modes()
245 	drm_display_info_set_bus_formats(&connector->display_info,  in db7430_get_modes()
249 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in db7430_get_modes()
266 	struct device *dev = &spi->dev;  in db7430_probe()
267 	struct db7430 *db;  in db7430_probe()  local
270 	db = devm_kzalloc(dev, sizeof(*db), GFP_KERNEL);  in db7430_probe()
271 	if (!db)  in db7430_probe()
272 		return -ENOMEM;  in db7430_probe()
273 	db->dev = dev;  in db7430_probe()
279 	db->regulators[0].supply = "vci";  in db7430_probe()
280 	db->regulators[1].supply = "vccio";  in db7430_probe()
282 				      ARRAY_SIZE(db->regulators),  in db7430_probe()
283 				      db->regulators);  in db7430_probe()
287 	db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in db7430_probe()
288 	if (IS_ERR(db->reset)) {  in db7430_probe()
289 		ret = PTR_ERR(db->reset);  in db7430_probe()
293 	ret = mipi_dbi_spi_init(spi, &db->dbi, NULL);  in db7430_probe()
297 	drm_panel_init(&db->panel, dev, &db7430_drm_funcs,  in db7430_probe()
301 	ret = drm_panel_of_backlight(&db->panel);  in db7430_probe()
305 	spi_set_drvdata(spi, db);  in db7430_probe()
307 	drm_panel_add(&db->panel);  in db7430_probe()
315 	struct db7430 *db = spi_get_drvdata(spi);  in db7430_remove()  local
317 	drm_panel_remove(&db->panel);  in db7430_remove()
322  * so list the different variants here and add per-variant data if needed.
341 		.name	= "db7430-panel",