1 // SPDX-License-Identifier: GPL-2.0
3  * NewVision NV3052C IPS LCD panel driver
12 #include <linux/media-bus-format.h>
16 #include <linux/spi/spi.h>
31 	struct drm_panel panel;  member
32 	struct mipi_dbi dbi;  member
235 static inline struct nv3052c *to_nv3052c(struct drm_panel *panel)  in to_nv3052c()  argument
237 	return container_of(panel, struct nv3052c, panel);  in to_nv3052c()
240 static int nv3052c_prepare(struct drm_panel *panel)  in nv3052c_prepare()  argument
242 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_prepare()
243 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_prepare()  local
247 	err = regulator_enable(priv->supply);  in nv3052c_prepare()
249 		dev_err(priv->dev, "Failed to enable power supply: %d\n", err);  in nv3052c_prepare()
254 	gpiod_set_value_cansleep(priv->reset_gpio, 1);  in nv3052c_prepare()
256 	gpiod_set_value_cansleep(priv->reset_gpio, 0);  in nv3052c_prepare()
260 		err = mipi_dbi_command(dbi, nv3052c_panel_regs[i].cmd,  in nv3052c_prepare()
264 			dev_err(priv->dev, "Unable to set register: %d\n", err);  in nv3052c_prepare()
269 	err = mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);  in nv3052c_prepare()
271 		dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);  in nv3052c_prepare()
278 	regulator_disable(priv->supply);  in nv3052c_prepare()
282 static int nv3052c_unprepare(struct drm_panel *panel)  in nv3052c_unprepare()  argument
284 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_unprepare()
285 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_unprepare()  local
288 	err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);  in nv3052c_unprepare()
290 		dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);  in nv3052c_unprepare()
292 	gpiod_set_value_cansleep(priv->reset_gpio, 1);  in nv3052c_unprepare()
293 	regulator_disable(priv->supply);  in nv3052c_unprepare()
298 static int nv3052c_enable(struct drm_panel *panel)  in nv3052c_enable()  argument
300 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_enable()
301 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_enable()  local
304 	err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);  in nv3052c_enable()
306 		dev_err(priv->dev, "Unable to enable display: %d\n", err);  in nv3052c_enable()
310 	if (panel->backlight) {  in nv3052c_enable()
318 static int nv3052c_disable(struct drm_panel *panel)  in nv3052c_disable()  argument
320 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_disable()
321 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_disable()  local
324 	err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);  in nv3052c_disable()
326 		dev_err(priv->dev, "Unable to disable display: %d\n", err);  in nv3052c_disable()
333 static int nv3052c_get_modes(struct drm_panel *panel,  in nv3052c_get_modes()  argument
336 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_get_modes()
337 	const struct nv3052c_panel_info *panel_info = priv->panel_info;  in nv3052c_get_modes()
341 	for (i = 0; i < panel_info->num_modes; i++) {  in nv3052c_get_modes()
342 		mode = drm_mode_duplicate(connector->dev,  in nv3052c_get_modes()
343 					  &panel_info->display_modes[i]);  in nv3052c_get_modes()
345 			return -ENOMEM;  in nv3052c_get_modes()
349 		mode->type = DRM_MODE_TYPE_DRIVER;  in nv3052c_get_modes()
350 		if (panel_info->num_modes == 1)  in nv3052c_get_modes()
351 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in nv3052c_get_modes()
356 	connector->display_info.bpc = 8;  in nv3052c_get_modes()
357 	connector->display_info.width_mm = panel_info->width_mm;  in nv3052c_get_modes()
358 	connector->display_info.height_mm = panel_info->height_mm;  in nv3052c_get_modes()
360 	drm_display_info_set_bus_formats(&connector->display_info,  in nv3052c_get_modes()
361 					 &panel_info->bus_format, 1);  in nv3052c_get_modes()
362 	connector->display_info.bus_flags = panel_info->bus_flags;  in nv3052c_get_modes()
364 	return panel_info->num_modes;  in nv3052c_get_modes()
375 static int nv3052c_probe(struct spi_device *spi)  in nv3052c_probe()  argument
377 	struct device *dev = &spi->dev;  in nv3052c_probe()
383 		return -ENOMEM;  in nv3052c_probe()
385 	priv->dev = dev;  in nv3052c_probe()
387 	priv->panel_info = of_device_get_match_data(dev);  in nv3052c_probe()
388 	if (!priv->panel_info)  in nv3052c_probe()
389 		return -EINVAL;  in nv3052c_probe()
391 	priv->supply = devm_regulator_get(dev, "power");  in nv3052c_probe()
392 	if (IS_ERR(priv->supply))  in nv3052c_probe()
393 		return dev_err_probe(dev, PTR_ERR(priv->supply), "Failed to get power supply\n");  in nv3052c_probe()
395 	priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in nv3052c_probe()
396 	if (IS_ERR(priv->reset_gpio))  in nv3052c_probe()
397 		return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), "Failed to get reset GPIO\n");  in nv3052c_probe()
399 	err = mipi_dbi_spi_init(spi, &priv->dbi, NULL);  in nv3052c_probe()
401 		return dev_err_probe(dev, err, "MIPI DBI init failed\n");  in nv3052c_probe()
403 	priv->dbi.read_commands = NULL;  in nv3052c_probe()
405 	spi_set_drvdata(spi, priv);  in nv3052c_probe()
407 	drm_panel_init(&priv->panel, dev, &nv3052c_funcs,  in nv3052c_probe()
410 	err = drm_panel_of_backlight(&priv->panel);  in nv3052c_probe()
414 	drm_panel_add(&priv->panel);  in nv3052c_probe()
419 static void nv3052c_remove(struct spi_device *spi)  in nv3052c_remove()  argument
421 	struct nv3052c *priv = spi_get_drvdata(spi);  in nv3052c_remove()
423 	drm_panel_remove(&priv->panel);  in nv3052c_remove()
424 	drm_panel_disable(&priv->panel);  in nv3052c_remove()
425 	drm_panel_unprepare(&priv->panel);  in nv3052c_remove()