1 // SPDX-License-Identifier: GPL-2.0
3  * NewVision NV3052C IPS LCD panel driver
12 #include <linux/media-bus-format.h>
35 	struct regulator *supply;  member
244 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_prepare()
248 	err = regulator_enable(priv->supply);  in nv3052c_prepare()
250 		dev_err(priv->dev, "Failed to enable power supply: %d\n", err);  in nv3052c_prepare()
255 	gpiod_set_value_cansleep(priv->reset_gpio, 1);  in nv3052c_prepare()
257 	gpiod_set_value_cansleep(priv->reset_gpio, 0);  in nv3052c_prepare()
265 			dev_err(priv->dev, "Unable to set register: %d\n", err);  in nv3052c_prepare()
272 		dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);  in nv3052c_prepare()
279 	regulator_disable(priv->supply);  in nv3052c_prepare()
286 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_unprepare()
291 		dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);  in nv3052c_unprepare()
293 	gpiod_set_value_cansleep(priv->reset_gpio, 1);  in nv3052c_unprepare()
294 	regulator_disable(priv->supply);  in nv3052c_unprepare()
302 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_enable()
307 		dev_err(priv->dev, "Unable to enable display: %d\n", err);  in nv3052c_enable()
311 	if (panel->backlight) {  in nv3052c_enable()
322 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_disable()
327 		dev_err(priv->dev, "Unable to disable display: %d\n", err);  in nv3052c_disable()
338 	const struct nv3052c_panel_info *panel_info = priv->panel_info;  in nv3052c_get_modes()
342 	for (i = 0; i < panel_info->num_modes; i++) {  in nv3052c_get_modes()
343 		mode = drm_mode_duplicate(connector->dev,  in nv3052c_get_modes()
344 					  &panel_info->display_modes[i]);  in nv3052c_get_modes()
346 			return -ENOMEM;  in nv3052c_get_modes()
350 		mode->type = DRM_MODE_TYPE_DRIVER;  in nv3052c_get_modes()
351 		if (panel_info->num_modes == 1)  in nv3052c_get_modes()
352 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in nv3052c_get_modes()
357 	connector->display_info.bpc = 8;  in nv3052c_get_modes()
358 	connector->display_info.width_mm = panel_info->width_mm;  in nv3052c_get_modes()
359 	connector->display_info.height_mm = panel_info->height_mm;  in nv3052c_get_modes()
361 	drm_display_info_set_bus_formats(&connector->display_info,  in nv3052c_get_modes()
362 					 &panel_info->bus_format, 1);  in nv3052c_get_modes()
363 	connector->display_info.bus_flags = panel_info->bus_flags;  in nv3052c_get_modes()
365 	return panel_info->num_modes;  in nv3052c_get_modes()
378 	struct device *dev = &spi->dev;  in nv3052c_probe()
384 		return -ENOMEM;  in nv3052c_probe()
386 	priv->dev = dev;  in nv3052c_probe()
388 	priv->panel_info = of_device_get_match_data(dev);  in nv3052c_probe()
389 	if (!priv->panel_info)  in nv3052c_probe()
390 		return -EINVAL;  in nv3052c_probe()
392 	priv->supply = devm_regulator_get(dev, "power");  in nv3052c_probe()
393 	if (IS_ERR(priv->supply))  in nv3052c_probe()
394 		return dev_err_probe(dev, PTR_ERR(priv->supply), "Failed to get power supply\n");  in nv3052c_probe()
396 	priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in nv3052c_probe()
397 	if (IS_ERR(priv->reset_gpio))  in nv3052c_probe()
398 		return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), "Failed to get reset GPIO\n");  in nv3052c_probe()
400 	err = mipi_dbi_spi_init(spi, &priv->dbi, NULL);  in nv3052c_probe()
404 	priv->dbi.read_commands = NULL;  in nv3052c_probe()
408 	drm_panel_init(&priv->panel, dev, &nv3052c_funcs,  in nv3052c_probe()
411 	err = drm_panel_of_backlight(&priv->panel);  in nv3052c_probe()
415 	drm_panel_add(&priv->panel);  in nv3052c_probe()
424 	drm_panel_remove(&priv->panel);  in nv3052c_remove()
425 	drm_panel_disable(&priv->panel);  in nv3052c_remove()
426 	drm_panel_unprepare(&priv->panel);  in nv3052c_remove()