1 // SPDX-License-Identifier: GPL-2.0
3  * NewVision NV3052C IPS LCD panel driver
12 #include <linux/media-bus-format.h>
17 #include <linux/spi/spi.h>
39 	struct drm_panel panel;  member
40 	struct mipi_dbi dbi;  member
257 	{ 0x23, 0x20 }, // RGB interface control: DE MODE PCLK-N
632 static inline struct nv3052c *to_nv3052c(struct drm_panel *panel)  in to_nv3052c()  argument
634 	return container_of(panel, struct nv3052c, panel);  in to_nv3052c()
637 static int nv3052c_prepare(struct drm_panel *panel)  in nv3052c_prepare()  argument
639 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_prepare()
640 	const struct nv3052c_reg *panel_regs = priv->panel_info->panel_regs;  in nv3052c_prepare()
641 	unsigned int panel_regs_len = priv->panel_info->panel_regs_len;  in nv3052c_prepare()
642 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_prepare()  local
646 	err = regulator_enable(priv->supply);  in nv3052c_prepare()
648 		dev_err(priv->dev, "Failed to enable power supply: %d\n", err);  in nv3052c_prepare()
653 	gpiod_set_value_cansleep(priv->reset_gpio, 1);  in nv3052c_prepare()
655 	gpiod_set_value_cansleep(priv->reset_gpio, 0);  in nv3052c_prepare()
659 		err = mipi_dbi_command(dbi, panel_regs[i].cmd,  in nv3052c_prepare()
663 			dev_err(priv->dev, "Unable to set register: %d\n", err);  in nv3052c_prepare()
668 	err = mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);  in nv3052c_prepare()
670 		dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);  in nv3052c_prepare()
677 	regulator_disable(priv->supply);  in nv3052c_prepare()
681 static int nv3052c_unprepare(struct drm_panel *panel)  in nv3052c_unprepare()  argument
683 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_unprepare()
684 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_unprepare()  local
687 	err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);  in nv3052c_unprepare()
689 		dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);  in nv3052c_unprepare()
691 	gpiod_set_value_cansleep(priv->reset_gpio, 1);  in nv3052c_unprepare()
692 	regulator_disable(priv->supply);  in nv3052c_unprepare()
697 static int nv3052c_enable(struct drm_panel *panel)  in nv3052c_enable()  argument
699 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_enable()
700 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_enable()  local
703 	err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);  in nv3052c_enable()
705 		dev_err(priv->dev, "Unable to enable display: %d\n", err);  in nv3052c_enable()
709 	if (panel->backlight) {  in nv3052c_enable()
717 static int nv3052c_disable(struct drm_panel *panel)  in nv3052c_disable()  argument
719 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_disable()
720 	struct mipi_dbi *dbi = &priv->dbi;  in nv3052c_disable()  local
723 	err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);  in nv3052c_disable()
725 		dev_err(priv->dev, "Unable to disable display: %d\n", err);  in nv3052c_disable()
732 static int nv3052c_get_modes(struct drm_panel *panel,  in nv3052c_get_modes()  argument
735 	struct nv3052c *priv = to_nv3052c(panel);  in nv3052c_get_modes()
736 	const struct nv3052c_panel_info *panel_info = priv->panel_info;  in nv3052c_get_modes()
740 	for (i = 0; i < panel_info->num_modes; i++) {  in nv3052c_get_modes()
741 		mode = drm_mode_duplicate(connector->dev,  in nv3052c_get_modes()
742 					  &panel_info->display_modes[i]);  in nv3052c_get_modes()
744 			return -ENOMEM;  in nv3052c_get_modes()
748 		mode->type = DRM_MODE_TYPE_DRIVER;  in nv3052c_get_modes()
749 		if (panel_info->num_modes == 1)  in nv3052c_get_modes()
750 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in nv3052c_get_modes()
755 	connector->display_info.bpc = 8;  in nv3052c_get_modes()
756 	connector->display_info.width_mm = panel_info->width_mm;  in nv3052c_get_modes()
757 	connector->display_info.height_mm = panel_info->height_mm;  in nv3052c_get_modes()
759 	drm_display_info_set_bus_formats(&connector->display_info,  in nv3052c_get_modes()
760 					 &panel_info->bus_format, 1);  in nv3052c_get_modes()
761 	connector->display_info.bus_flags = panel_info->bus_flags;  in nv3052c_get_modes()
763 	return panel_info->num_modes;  in nv3052c_get_modes()
774 static int nv3052c_probe(struct spi_device *spi)  in nv3052c_probe()  argument
776 	struct device *dev = &spi->dev;  in nv3052c_probe()
782 		return -ENOMEM;  in nv3052c_probe()
784 	priv->dev = dev;  in nv3052c_probe()
786 	priv->panel_info = of_device_get_match_data(dev);  in nv3052c_probe()
787 	if (!priv->panel_info)  in nv3052c_probe()
788 		return -EINVAL;  in nv3052c_probe()
790 	priv->supply = devm_regulator_get(dev, "power");  in nv3052c_probe()
791 	if (IS_ERR(priv->supply))  in nv3052c_probe()
792 		return dev_err_probe(dev, PTR_ERR(priv->supply), "Failed to get power supply\n");  in nv3052c_probe()
794 	priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in nv3052c_probe()
795 	if (IS_ERR(priv->reset_gpio))  in nv3052c_probe()
796 		return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), "Failed to get reset GPIO\n");  in nv3052c_probe()
798 	err = mipi_dbi_spi_init(spi, &priv->dbi, NULL);  in nv3052c_probe()
800 		return dev_err_probe(dev, err, "MIPI DBI init failed\n");  in nv3052c_probe()
802 	priv->dbi.read_commands = NULL;  in nv3052c_probe()
804 	spi_set_drvdata(spi, priv);  in nv3052c_probe()
806 	drm_panel_init(&priv->panel, dev, &nv3052c_funcs,  in nv3052c_probe()
809 	err = drm_panel_of_backlight(&priv->panel);  in nv3052c_probe()
813 	drm_panel_add(&priv->panel);  in nv3052c_probe()
818 static void nv3052c_remove(struct spi_device *spi)  in nv3052c_remove()  argument
820 	struct nv3052c *priv = spi_get_drvdata(spi);  in nv3052c_remove()
822 	drm_panel_remove(&priv->panel);  in nv3052c_remove()
823 	drm_panel_disable(&priv->panel);  in nv3052c_remove()
824 	drm_panel_unprepare(&priv->panel);  in nv3052c_remove()
920 	{ "wl-355608-a8", },
923 MODULE_DEVICE_TABLE(spi, nv3052c_ids);
928 	{ .compatible = "anbernic,rg35xx-plus-panel", .data = &wl_355608_a8_panel_info },
947 MODULE_DESCRIPTION("NewVision NV3052C IPS LCD panel driver");