RG280M (and possibly other devices) panel driver settings

drivers/gpu/drm/ingenic/ingenic-drm-drv.c

@@ -669,6 +669,8 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
 			}
 		}
 	}
+
+	regmap_write(priv->map, 0x90, 0x33);
 
 	regmap_write(priv->map, JZ_REG_LCD_CFG, cfg);
 }

drivers/gpu/drm/panel/Kconfig

@@ -390,6 +390,14 @@ config DRM_PANEL_SHARP_LS043T1LE01
 	  Say Y here if you want to enable support for Sharp LS043T1LE01 qHD
 	  (540x960) DSI panel as found on the Qualcomm APQ8074 Dragonboard
 
+config DRM_PANEL_SHARP_Y030XX067A
+	tristate "Sharp Y030XX067A 320x480 LCD panel"
+	depends on OF && SPI
+	select REGMAP_SPI
+	help
+	  Say Y here to enable support for the Sharp Y030XX067A 320x480 3.0"
+	  panel as found on the YLM RG-99 handheld gaming console.
+
 config DRM_PANEL_SITRONIX_ST7701
 	tristate "Sitronix ST7701 panel driver"
 	depends on OF

drivers/gpu/drm/panel/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
+obj-$(CONFIG_DRM_PANEL_SHARP_Y030XX067A) += panel-sharp-y030xx067a.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o

drivers/gpu/drm/panel/panel-sharp-y030xx067a.c

@@ -0,0 +1,343 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sharp Y030XX067A IPS LCD panel driver
+ *
+ * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#define REG00_VBRT_CTRL(val)		(val)
+
+#define REG01_COM_DC(val)		(val)
+
+#define REG02_DA_CONTRAST(val)		(val)
+#define REG02_VESA_SEL(val)		((val) << 5)
+#define REG02_COMDC_SW			BIT(7)
+
+#define REG03_VPOSITION(val)		(val)
+#define REG03_BSMOUNT			BIT(5)
+#define REG03_COMTST			BIT(6)
+#define REG03_HPOSITION1		BIT(7)
+
+#define REG04_HPOSITION1(val)		(val)
+
+#define REG05_CLIP			BIT(0)
+#define REG05_NVM_VREFRESH		BIT(1)
+#define REG05_SLFR			BIT(2)
+#define REG05_SLBRCHARGE(val)		((val) << 3)
+#define REG05_PRECHARGE_LEVEL(val)	((val) << 6)
+
+#define REG06_TEST5			BIT(0)
+#define REG06_SLDWN			BIT(1)
+#define REG06_SLRGT			BIT(2)
+#define REG06_TEST2			BIT(3)
+#define REG06_XPSAVE			BIT(4)
+#define REG06_GAMMA_SEL(val)		((val) << 5)
+#define REG06_NT			BIT(7)
+
+#define REG07_TEST1			BIT(0)
+#define REG07_HDVD_POL			BIT(1)
+#define REG07_CK_POL			BIT(2)
+#define REG07_TEST3			BIT(3)
+#define REG07_TEST4			BIT(4)
+#define REG07_480_LINEMASK		BIT(5)
+#define REG07_AMPTST(val)		((val) << 6)
+
+#define REG08_SLHRC(val)		(val)
+#define REG08_CLOCK_DIV(val)		((val) << 2)
+#define REG08_PANEL(val)		((val) << 5)
+
+#define REG09_SUB_BRIGHT_R(val)		(val)
+#define REG09_NW_NB			BIT(6)
+#define REG09_IPCON			BIT(7)
+
+#define REG0A_SUB_BRIGHT_B(val)		(val)
+#define REG0A_PAIR			BIT(6)
+#define REG0A_DE_SEL			BIT(7)
+
+#define REG0B_MBK_POSITION(val)		(val)
+#define REG0B_HD_FREERUN		BIT(4)
+#define REG0B_VD_FREERUN		BIT(5)
+#define REG0B_YUV2BIN(val)		((val) << 6)
+
+#define REG0C_CONTRAST_R(val)		(val)
+#define REG0C_DOUBLEREAD		BIT(7)
+
+#define REG0D_CONTRAST_G(val)		(val)
+#define REG0D_RGB_YUV			BIT(7)
+
+#define REG0E_CONTRAST_B(val)		(val)
+#define REG0E_PIXELCOLORWIRE		BIT(7)
+
+#define REG0F_ASPECT			BIT(0)
+#define REG0F_OVERSCAN(val)		((val) << 1)
+#define REG0F_FRAMEWIDTH(val)		((val) << 3)
+
+#define REG10_BRIGHT(val)		(val)
+
+#define REG11_SIG_GAIN(val)		(val)
+#define REG11_SIGC_CNTL			BIT(6)
+#define REG11_SIGC_POL			BIT(7)
+
+#define REG12_COLOR(val)		(val)
+#define REG12_PWCKSEL(val)		((val) << 6)
+
+#define REG13_4096LEVEL_CNTL(val)	(val)
+#define REG13_SL4096(val)		((val) << 4)
+#define REG13_LIMITER_CONTROL		BIT(7)
+
+#define REG14_PANEL_TEST(val)		(val)
+
+#define REG15_NVM_LINK0			BIT(0)
+#define REG15_NVM_LINK1			BIT(1)
+#define REG15_NVM_LINK2			BIT(2)
+#define REG15_NVM_LINK3			BIT(3)
+#define REG15_NVM_LINK4			BIT(4)
+#define REG15_NVM_LINK5			BIT(5)
+#define REG15_NVM_LINK6			BIT(6)
+#define REG15_NVM_LINK7			BIT(7)
+
+struct y030xx067a_info {
+	const struct drm_display_mode *display_modes;
+	unsigned int num_modes;
+	u16 width_mm, height_mm;
+	u32 bus_format, bus_flags;
+};
+
+struct y030xx067a {
+	struct drm_panel panel;
+	struct spi_device *spi;
+	struct regmap *map;
+
+	const struct y030xx067a_info *panel_info;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+};
+
+static inline struct y030xx067a *to_y030xx067a(struct drm_panel *panel)
+{
+	return container_of(panel, struct y030xx067a, panel);
+}
+
+static const struct reg_sequence y030xx067a_init_sequence[] = {
+	{ 0x00, REG00_VBRT_CTRL(0x7f) },	
+	{ 0x02, REG02_DA_CONTRAST(0x1f) | REG02_VESA_SEL(0x3) },
+	{ 0x03, REG03_VPOSITION(0x0a) },
+	{ 0x04, REG04_HPOSITION1(0x40) },
+	{ 0x06, REG06_XPSAVE | REG06_NT },
+	{ 0x08, REG08_PANEL(0x1) | REG08_CLOCK_DIV(0x2) },
+	{ 0x09, REG09_SUB_BRIGHT_R(0x20) },
+	{ 0x0a, REG0A_SUB_BRIGHT_B(0x20) },
+	{ 0x0c, REG0C_CONTRAST_R(0x10) },
+	{ 0x0d, REG0D_CONTRAST_G(0x10) },
+	{ 0x0e, REG0E_CONTRAST_B(0x10) | REG0E_PIXELCOLORWIRE },
+	{ 0x10, REG10_BRIGHT(0x80) },
+	{ 0x11, REG11_SIG_GAIN(0x3f) },
+};
+
+static int y030xx067a_prepare(struct drm_panel *panel)
+{
+	struct y030xx067a *priv = to_y030xx067a(panel);
+	struct device *dev = &priv->spi->dev;
+	int err;
+
+	err = regulator_enable(priv->supply);
+	if (err) {
+		dev_err(dev, "Failed to enable power supply: %d\n", err);
+		return err;
+	}
+
+	/* Reset the chip */
+	gpiod_set_value_cansleep(priv->reset_gpio, 1);
+	usleep_range(1000, 20000);
+	gpiod_set_value_cansleep(priv->reset_gpio, 0);
+	usleep_range(1000, 20000);
+
+	err = regmap_multi_reg_write(priv->map, y030xx067a_init_sequence,
+				     ARRAY_SIZE(y030xx067a_init_sequence));
+	if (err) {
+		dev_err(dev, "Failed to init registers: %d\n", err);
+		goto err_disable_regulator;
+	}
+
+	return 0;
+
+err_disable_regulator:
+	regulator_disable(priv->supply);
+	return err;
+}
+
+static int y030xx067a_unprepare(struct drm_panel *panel)
+{
+	struct y030xx067a *priv = to_y030xx067a(panel);
+
+	gpiod_set_value_cansleep(priv->reset_gpio, 1);
+	regulator_disable(priv->supply);
+
+	return 0;
+}
+
+static int y030xx067a_get_modes(struct drm_panel *panel,
+				struct drm_connector *connector)
+{
+	struct y030xx067a *priv = to_y030xx067a(panel);
+	const struct y030xx067a_info *panel_info = priv->panel_info;
+	struct drm_display_mode *mode;
+	unsigned int i;
+
+	for (i = 0; i < panel_info->num_modes; i++) {
+		mode = drm_mode_duplicate(connector->dev,
+					  &panel_info->display_modes[i]);
+		if (!mode)
+			return -ENOMEM;
+
+		drm_mode_set_name(mode);
+
+		mode->type = DRM_MODE_TYPE_DRIVER;
+		if (panel_info->num_modes == 1)
+			mode->type |= DRM_MODE_TYPE_PREFERRED;
+
+		drm_mode_probed_add(connector, mode);
+	}
+
+	connector->display_info.bpc = 8;
+	connector->display_info.width_mm = panel_info->width_mm;
+	connector->display_info.height_mm = panel_info->height_mm;
+
+	drm_display_info_set_bus_formats(&connector->display_info,
+					 &panel_info->bus_format, 1);
+	connector->display_info.bus_flags = panel_info->bus_flags;
+
+	return panel_info->num_modes;
+}
+
+static const struct drm_panel_funcs y030xx067a_funcs = {
+	.prepare	= y030xx067a_prepare,
+	.unprepare	= y030xx067a_unprepare,
+	.get_modes	= y030xx067a_get_modes,
+};
+
+static const struct regmap_config y030xx067a_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x15,
+};
+
+static int y030xx067a_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct y030xx067a *priv;
+	int err;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->spi = spi;
+	spi_set_drvdata(spi, priv);
+
+	priv->map = devm_regmap_init_spi(spi, &y030xx067a_regmap_config);
+	if (IS_ERR(priv->map)) {
+		dev_err(dev, "Unable to init regmap\n");
+		return PTR_ERR(priv->map);
+	}
+
+	priv->panel_info = of_device_get_match_data(dev);
+	if (!priv->panel_info)
+		return -EINVAL;
+
+	priv->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(priv->supply)) {
+		dev_err(dev, "Failed to get power supply\n");
+		return PTR_ERR(priv->supply);
+	}
+
+	priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(priv->reset_gpio)) {
+		dev_err(dev, "Failed to get reset GPIO\n");
+		return PTR_ERR(priv->reset_gpio);
+	}
+
+	drm_panel_init(&priv->panel, dev, &y030xx067a_funcs,
+		       DRM_MODE_CONNECTOR_DPI);
+
+	err = drm_panel_of_backlight(&priv->panel);
+	if (err)
+		return err;
+
+	err = drm_panel_add(&priv->panel);
+	if (err < 0) {
+		dev_err(dev, "Failed to add panel\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int y030xx067a_remove(struct spi_device *spi)
+{
+	struct y030xx067a *priv = spi_get_drvdata(spi);
+
+	drm_panel_remove(&priv->panel);
+	drm_panel_disable(&priv->panel);
+	drm_panel_unprepare(&priv->panel);
+
+	return 0;
+}
+
+static const struct drm_display_mode y030xx067a_modes[] = {
+	{
+		.clock = 43200,
+		.hdisplay = 320,
+		.hsync_start = 320 + 100,
+		.hsync_end = 320 + 100 + 30,
+		.htotal = 320 + 100 + 30 + 35,
+		.vdisplay = 480,
+		.vsync_start = 480 + 124,
+		.vsync_end = 480 + 124 + 20,
+		.vtotal = 480 + 124 + 20 + 16,
+		.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	},
+};
+
+static const struct y030xx067a_info y030xx067a_info = {
+	.display_modes = y030xx067a_modes,
+	.num_modes = ARRAY_SIZE(y030xx067a_modes),
+	.width_mm = 69,
+	.height_mm = 51,
+	.bus_format = MEDIA_BUS_FMT_RGB888_3X8,
+	.bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE | DRM_BUS_FLAG_DE_LOW,
+};
+
+static const struct of_device_id y030xx067a_of_match[] = {
+	{ .compatible = "sharp,y030xx067a", .data = &y030xx067a_info },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, y030xx067a_of_match);
+
+static struct spi_driver y030xx067a_driver = {
+	.driver = {
+		.name = "sharp-y030xx067a",
+		.of_match_table = y030xx067a_of_match,
+	},
+	.probe = y030xx067a_probe,
+	.remove = y030xx067a_remove,
+};
+module_spi_driver(y030xx067a_driver);
+
+MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
+MODULE_LICENSE("GPL v2");