From: Hyungwon Hwang <human.hwang@samsung.com>
Date: Fri, 2 Aug 2013 08:09:48 +0000 (+0900)
Subject: DT: support l5f31188 panel
X-Git-Tag: submit/tizen/20141121.110247~3344
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a76b1878856e6fdea50085adea1d155c4159e991;p=platform%2Fkernel%2Flinux-3.10.git

DT: support l5f31188 panel

Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
---

diff --git a/arch/arm/boot/dts/exynos4412-redwoodlte.dts b/arch/arm/boot/dts/exynos4412-redwoodlte.dts
index 86fa455..a846ea9 100644
--- a/arch/arm/boot/dts/exynos4412-redwoodlte.dts
+++ b/arch/arm/boot/dts/exynos4412-redwoodlte.dts
@@ -574,6 +574,61 @@
 		regulator-always-on;
 	};
 
+	fimd0_lcd: panel {
+		compatible = "samsung,l5f31188";
+		width = <720>;
+		height = <1280>;
+		reset-gpio = <&gpf2 1 0>;
+		reset-delay1 = <15>;
+		reset-delay2 = <180>;
+		power-on-delay = <120>;
+		power-off-delay1 = <100>;
+		power-off-delay2 = <200>;
+		vdd-supply = <&ldo25_reg>;
+		vddi-supply = <&ldo5_reg>;
+		video-source = <&dsi_0>;
+		samsung,panel-width-mm = <59>; /* FIXME */
+		samsung,panel-height-mm = <105>; /* FIXME */
+
+		display-timings {
+			native-mode = <&timing0>;
+
+			timing0: timing-0 {
+				clock-frequency = <0>;
+				hactive = <720>;
+				vactive = <1280>;
+				hfront-porch = <81>;
+				hback-porch = <81>;
+				hsync-len = <27>;
+				vfront-porch = <11>;
+				vback-porch = <4>;
+				vsync-len = <2>;
+			};
+		};
+	};
+
+	dsi_0: dsi@11C80000 {
+		samsung,pll-stable-time = <500>;
+		samsung,stop-holding-count = <0x7ff>;
+		samsung,bta-timeout = <0xff>;
+		samsung,rx-timeout = <0xffff>;
+		samsung,pll-clk-freq = <24000000>;
+		samsung,cmd-allow = <0xf>;
+		vdd11-supply = <&ldo8_reg>;
+		vdd18-supply = <&ldo10_reg>;
+		status = "okay";
+	};
+
+	fimd@11c00000 {
+		samsung,fimd-display = <&fimd0_lcd>;
+		samsung,fimd-vidout-rgb;
+		samsung,fimd-inv-vclk;
+		samsung,fimd-frame-rate = <60>;
+		samsung,default-window = <3>;
+		samsung,fimd-win-bpp = <32>;
+		status = "okay";
+	};
+
 	vidi {
 		compatible = "samsung,exynos-drm-vidi";
 	};
diff --git a/arch/arm/configs/tizen_defconfig b/arch/arm/configs/tizen_defconfig
index 7bc6e6e..481ffe7 100644
--- a/arch/arm/configs/tizen_defconfig
+++ b/arch/arm/configs/tizen_defconfig
@@ -2149,6 +2149,7 @@ CONFIG_BACKLIGHT_GENERIC=y
 CONFIG_DISPLAY_CORE=y
 CONFIG_DISPLAY_PANEL_S6D6AA1=y
 CONFIG_DISPLAY_PANEL_S6E8AA0=y
+CONFIG_DISPLAY_PANEL_L5F31188=y
 CONFIG_DISPLAY_SOURCE_EXYNOS_DSI=y
 
 #
diff --git a/drivers/video/display/Kconfig b/drivers/video/display/Kconfig
index 49f6dab..f0ab8d2 100644
--- a/drivers/video/display/Kconfig
+++ b/drivers/video/display/Kconfig
@@ -13,6 +13,11 @@ config DISPLAY_PANEL_S6E8AA0
 	tristate "S6E8AA0 DSI video mode panel"
 	select OF_VIDEOMODE
 
+config DISPLAY_PANEL_L5F31188
+	tristate "L5F31188 DSI video mode panel"
+	depends on OF
+	select VIDEOMODE_HELPERS
+
 config DISPLAY_SOURCE_EXYNOS_DSI
 	tristate "Samsung SoC MIPI DSI Master"
 
diff --git a/drivers/video/display/Makefile b/drivers/video/display/Makefile
index 55ab711..4cfab97 100644
--- a/drivers/video/display/Makefile
+++ b/drivers/video/display/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_DISPLAY_CORE) += display-core.o
 obj-$(CONFIG_DISPLAY_PANEL_S6D6AA1) += panel-s6d6aa1.o
 obj-$(CONFIG_DISPLAY_PANEL_S6E8AA0) += panel-s6e8aa0.o
+obj-$(CONFIG_DISPLAY_PANEL_L5F31188) += panel-l5f31188.o
 obj-$(CONFIG_DISPLAY_SOURCE_EXYNOS_DSI) += source-exynos_dsi.o
diff --git a/drivers/video/display/panel-l5f31188.c b/drivers/video/display/panel-l5f31188.c
new file mode 100644
index 0000000..4330a68
--- /dev/null
+++ b/drivers/video/display/panel-l5f31188.c
@@ -0,0 +1,674 @@
+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd. All rights reserved.
+ * Hyungwon Hwang <human.hwang@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/delay.h>
+#include <linux/lcd.h>
+#include <linux/fb.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/display.h>
+#include <video/mipi_display.h>
+#include <video/videomode.h>
+#include <video/of_videomode.h>
+
+#define NUM_REGULATOR_CONSUMERS	2
+
+#define MIN_BRIGHTNESS		(0)
+#define MAX_BRIGHTNESS		(255)
+
+#define SCAN_FROM_LEFT_TO_RIGHT 0
+#define SCAN_FROM_RIGHT_TO_LEFT 1
+#define SCAN_FROM_TOP_TO_BOTTOM 0
+#define SCAN_FROM_BOTTOM_TO_TOP 1
+
+#define to_panel(p)	container_of(p, struct l5f31188, entity)
+
+enum cabc_mode {
+	CABC_OFF,
+	USER_INTERFACE_IMAGE,
+	STILL_PICTURE,
+	MOVING_IMAGE
+};
+
+struct l5f31188_platform_data {
+	unsigned long width;		/* Panel width in mm */
+	unsigned long height;		/* Panel height in mm */
+	struct videomode mode;
+
+	/* time needed while resetting */
+	unsigned int reset_delay1;
+
+	/* time needed after reset */
+	unsigned int reset_delay2;
+
+	/* stable time needing to become panel power on. */
+	unsigned int power_on_delay;
+
+	/* time needed after display off */
+	unsigned int power_off_delay1;
+
+	/* time needed after sleep off */
+	unsigned int power_off_delay2;
+};
+
+struct l5f31188 {
+	struct display_entity entity;
+	struct device *dev;
+
+	struct l5f31188_platform_data *pdata;
+	struct backlight_device *bd;
+	struct regulator_bulk_data regs[NUM_REGULATOR_CONSUMERS];
+
+	unsigned int power;
+	enum cabc_mode cabc_mode;
+
+	unsigned int reset_gpio;
+};
+
+static void l5f31188_delay(unsigned int msecs)
+{
+	/* refer from documentation/timers/timers-howto.txt */
+	if (msecs < 20)
+		usleep_range(msecs * 1000, (msecs + 1) * 1000);
+	else
+		msleep(msecs);
+}
+
+static void l5f31188_sleep_in(struct video_source *source)
+{
+
+	const unsigned char data_to_send[] = {
+		0x10, 0x00
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_sleep_out(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0x11, 0x00
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_gamma(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0x26, 0x00
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_display_off(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0x28, 0x00
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_display_on(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0x29, 0x00
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_ctl_memory_access(struct video_source *source,
+		int h_direction, int v_direction)
+{
+	const unsigned char data_to_send[] = {
+		0x36, ((h_direction & 0x1) << 1) | (v_direction & 0x1)
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_pixel_format(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0x3A, 0x70
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_write_disbv(struct video_source *source,
+		unsigned int brightness)
+{
+	const unsigned char data_to_send[] = {
+		0x51, brightness
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_write_ctrld(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0x53, 0x2C
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_write_cabc(struct video_source *source,
+		enum cabc_mode cabc_mode)
+{
+	const unsigned char data_to_send[] = {
+		0x55, cabc_mode
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_write_cabcmb(struct video_source *source,
+		unsigned int min_brightness)
+{
+	const unsigned char data_to_send[] = {
+		0x5E, min_brightness
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_extension(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0xB9, 0xFF, 0x83, 0x94
+	};
+
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_dgc_lut(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0xC1, 0x01, 0x00, 0x04, 0x0E, 0x18, 0x1E,
+		0x26, 0x2F, 0x36, 0x3E, 0x47, 0x4E, 0x56,
+		0x5D, 0x65, 0x6D, 0x75, 0x7D, 0x84, 0x8C,
+		0x94, 0x9C, 0xA4, 0xAD, 0xB5, 0xBD, 0xC5,
+		0xCC, 0xD4, 0xDE, 0xE5, 0xEE, 0xF7, 0xFF,
+		0x3F, 0x9A, 0xCE, 0xD4, 0x21, 0xA1, 0x26,
+		0x54, 0x00, 0x00, 0x04, 0x0E, 0x19, 0x1F,
+		0x27, 0x30, 0x37, 0x40, 0x48, 0x50, 0x58,
+		0x60, 0x67, 0x6F, 0x77, 0x7F, 0x87, 0x8F,
+		0x97, 0x9F, 0xA7, 0xB0, 0xB8, 0xC0, 0xC8,
+		0xCE, 0xD8, 0xE0, 0xE7, 0xF0, 0xF7, 0xFF,
+		0x3C, 0xEB, 0xFD, 0x2F, 0x66, 0xA8, 0x2C,
+		0x46, 0x00, 0x00, 0x04, 0x0E, 0x18, 0x1E,
+		0x26, 0x30, 0x38, 0x41, 0x4A, 0x52, 0x5A,
+		0x62, 0x6B, 0x73, 0x7B, 0x83, 0x8C, 0x94,
+		0x9C, 0xA5, 0xAD, 0xB6, 0xBD, 0xC5, 0xCC,
+		0xD4, 0xDD, 0xE3, 0xEB, 0xF2, 0xF9, 0xFF,
+		0x3F, 0xA4, 0x8A, 0x8F, 0xC7, 0x33, 0xF5,
+		0xE9, 0x00
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_tcon(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0xC7, 0x00, 0x20
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_ptba(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0xBF, 0x06, 0x10
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static void l5f31188_set_eco(struct video_source *source)
+{
+	const unsigned char data_to_send[] = {
+		0xC6, 0x0C
+	};
+	dsi_dcs_write(source, 0,
+			data_to_send, ARRAY_SIZE(data_to_send));
+}
+
+static int l5f31188_get_brightness(struct backlight_device *bd)
+{
+	return bd->props.brightness;
+}
+
+
+static int l5f31188_set_brightness(struct backlight_device *bd)
+{
+	int brightness = bd->props.brightness;
+	struct l5f31188 *panel = bl_get_data(bd);
+	enum display_entity_state state;
+	int ret;
+
+	if (bd->props.power == FB_BLANK_POWERDOWN
+			|| bd->props.state & BL_CORE_SUSPENDED)
+		state = DISPLAY_ENTITY_STATE_OFF;
+	else if (bd->props.power != FB_BLANK_UNBLANK)
+		state = DISPLAY_ENTITY_STATE_STANDBY;
+	else
+		state = DISPLAY_ENTITY_STATE_ON;
+
+	if (panel->power == FB_BLANK_POWERDOWN) {
+		dev_err(panel->dev,
+				"panel off: brightness set failed.\n");
+		return -EINVAL;
+	}
+
+	if (brightness < 0 || brightness > bd->props.max_brightness) {
+		dev_err(panel->dev, "panel brightness should be 0 to %d.\n",
+				MAX_BRIGHTNESS);
+		return -EINVAL;
+	}
+
+	ret = display_entity_set_state(&panel->entity, state);
+	if (ret)
+		return ret;
+
+	if (state == DISPLAY_ENTITY_STATE_OFF)
+		return 0;
+
+	l5f31188_write_disbv(panel->entity.source, brightness);
+
+	return 0;
+}
+
+static const struct backlight_ops l5f31188_backlight_ops = {
+	.get_brightness = l5f31188_get_brightness,
+	.update_status = l5f31188_set_brightness,
+};
+
+static void l5f31188_set_sequence(struct l5f31188 *panel)
+{
+	int brightness = panel->bd->props.brightness;
+	struct video_source *source = panel->entity.source;
+
+	l5f31188_set_extension(source);
+	l5f31188_set_dgc_lut(source);
+
+	l5f31188_set_eco(source);
+	l5f31188_set_tcon(source);
+	l5f31188_set_ptba(source);
+	l5f31188_set_gamma(source);
+	l5f31188_ctl_memory_access(source, SCAN_FROM_LEFT_TO_RIGHT,
+			SCAN_FROM_TOP_TO_BOTTOM);
+	l5f31188_set_pixel_format(source);
+	l5f31188_write_disbv(source, brightness);
+	l5f31188_write_ctrld(source);
+	l5f31188_write_cabc(source, 0x0);
+	l5f31188_write_cabcmb(source, 0x0);
+
+	l5f31188_sleep_out(source);
+	l5f31188_delay(panel->pdata->power_on_delay);
+	l5f31188_display_on(source);
+
+	dev_info(panel->dev, "%s:done.\n", __func__);
+}
+
+#ifdef CONFIG_OF
+static int l5f31188_reset(struct device *dev)
+{
+	struct l5f31188 *panel = dev_get_drvdata(dev);
+
+	gpio_set_value(panel->reset_gpio, 0);
+	l5f31188_delay(panel->pdata->reset_delay1);
+	gpio_set_value(panel->reset_gpio, 1);
+	l5f31188_delay(panel->pdata->reset_delay2);
+
+	return 0;
+}
+
+static struct l5f31188_platform_data *l5f31188_parse_dt(struct l5f31188 *panel)
+{
+	struct device_node *node = panel->dev->of_node;
+	struct l5f31188_platform_data *data;
+	const __be32 *prop_data;
+
+	data = devm_kzalloc(panel->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		dev_err(panel->dev, "failed to allocate platform data.\n");
+		return NULL;
+	}
+
+	if (of_get_videomode(node, &data->mode, 0)) {
+		dev_err(panel->dev, "failed to read video mode from DT\n");
+		return NULL;
+	}
+
+	panel->reset_gpio = of_get_named_gpio(node, "reset-gpio", 0);
+	if (panel->reset_gpio < 0)
+		return NULL;
+
+	prop_data = of_get_property(node, "width", NULL);
+	if (!prop_data)
+		return NULL;
+	data->width = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "height", NULL);
+	if (!prop_data)
+		return NULL;
+	data->height = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "reset-delay1", NULL);
+	if (!prop_data)
+		return NULL;
+	data->reset_delay1 = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "reset-delay2", NULL);
+	if (!prop_data)
+		return NULL;
+	data->reset_delay2 = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "power-on-delay", NULL);
+	if (!prop_data)
+		return NULL;
+	data->power_on_delay = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "power-off-delay1", NULL);
+	if (!prop_data)
+		return NULL;
+	data->power_off_delay1 = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "power-off-delay2", NULL);
+	if (!prop_data)
+		return NULL;
+	data->power_off_delay2 = be32_to_cpu(*prop_data);
+
+	prop_data = of_get_property(node, "vdd-supply", NULL);
+	if (!prop_data)
+		return NULL;
+
+	return data;
+}
+
+static struct of_device_id l5f31188_of_match[] = {
+	{ .compatible = "samsung,l5f31188" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, l5f31188_of_match);
+#else
+static struct l5f31188_platform_data *l5f31188_parse_dt(struct l5f31188 *panel)
+{
+	return NULL;
+}
+#endif
+
+static const struct display_entity_interface_params l5f31188_params = {
+	.type = DISPLAY_ENTITY_INTERFACE_DSI,
+	.p.dsi = {
+		.format = DSI_FMT_RGB888,
+		.mode = DSI_MODE_VIDEO | DSI_MODE_VIDEO_BURST
+			| DSI_MODE_VIDEO_HFP | DSI_MODE_VIDEO_HBP
+			| DSI_MODE_VIDEO_HSA | DSI_MODE_EOT_PACKET
+			| DSI_MODE_VSYNC_FLUSH,
+		.data_lanes = 0xf,
+		.hs_clk_freq = 500000000,
+		.esc_clk_freq = 10000000,
+	},
+};
+
+static void l5f31188_power_on(struct l5f31188 *panel)
+{
+	struct video_source *src = panel->entity.source;
+	int ret;
+
+	ret = regulator_bulk_enable(NUM_REGULATOR_CONSUMERS,
+			panel->regs);
+	if (ret != 0) {
+		dev_err(panel->dev, "failed to enable regulators (%d)\n", ret);
+		return;
+	}
+
+	/* panel reset */
+	l5f31188_reset(panel->dev);
+
+	src->ops.dsi->enable(src);
+
+	l5f31188_set_sequence(panel);
+
+	return;
+}
+
+static void l5f31188_power_off(struct l5f31188 *panel)
+{
+	struct video_source *src = panel->entity.source;
+
+	l5f31188_display_off(src);
+	l5f31188_delay(panel->pdata->power_off_delay1);
+	l5f31188_sleep_in(src);
+	l5f31188_delay(panel->pdata->power_off_delay2);
+
+	src->ops.dsi->disable(src);
+
+	regulator_bulk_disable(NUM_REGULATOR_CONSUMERS,
+			panel->regs);
+}
+
+static int l5f31188_set_state(struct display_entity *entity,
+		enum display_entity_state state)
+{
+	struct l5f31188 *panel = to_panel(entity);
+	struct video_source *src = panel->entity.source;
+
+	switch (state) {
+	case DISPLAY_ENTITY_STATE_OFF:
+		if (entity->state == DISPLAY_ENTITY_STATE_ON)
+			src->common_ops->set_stream(src,
+					DISPLAY_ENTITY_STREAM_STOPPED);
+
+		l5f31188_power_off(panel);
+		break;
+	case DISPLAY_ENTITY_STATE_ON:
+		if (entity->state == DISPLAY_ENTITY_STATE_OFF)
+			l5f31188_power_on(panel);
+
+		src->common_ops->set_stream(src,
+				DISPLAY_ENTITY_STREAM_CONTINUOUS);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int l5f31188_get_modes(struct display_entity *entity,
+		const struct videomode **modes)
+{
+	struct l5f31188 *panel = to_panel(entity);
+
+	*modes = &panel->pdata->mode;
+	return 1;
+}
+
+static int l5f31188_get_size(struct display_entity *entity,
+		unsigned int *width, unsigned int *height)
+{
+	struct l5f31188 *panel = to_panel(entity);
+
+	*width = panel->pdata->width;
+	*height = panel->pdata->height;
+	return 0;
+}
+
+static int l5f31188_get_params(struct display_entity *entity,
+		struct display_entity_interface_params *params)
+{
+	*params = l5f31188_params;
+	return 0;
+}
+
+static const struct display_entity_control_ops l5f31188_control_ops = {
+	.set_state = l5f31188_set_state,
+	.get_modes = l5f31188_get_modes,
+	.get_size = l5f31188_get_size,
+	.get_params = l5f31188_get_params,
+};
+
+static void l5f31188_release(struct display_entity *entity)
+{
+	struct l5f31188 *panel = to_panel(entity);
+
+	backlight_device_unregister(panel->bd);
+	regulator_bulk_free(NUM_REGULATOR_CONSUMERS, panel->regs);
+	kfree(panel);
+}
+
+static int l5f31188_probe(struct platform_device *pdev)
+{
+	struct l5f31188 *panel;
+	int ret;
+
+	panel = kzalloc(sizeof(struct l5f31188), GFP_KERNEL);
+	if (!panel) {
+		dev_err(&pdev->dev,
+				"failed to allocate l5f31188 structure.\n");
+		return -ENOMEM;
+	}
+
+	panel->dev = &pdev->dev;
+	panel->pdata = 
+		(struct l5f31188_platform_data *)pdev->dev.platform_data;
+
+	if (!panel->pdata) {
+		panel->pdata = l5f31188_parse_dt(panel);
+		if (!panel->pdata) {
+			dev_err(&pdev->dev, "failed to find platform data\n");
+			return -ENODEV;
+		}
+	}
+
+	panel->regs[0].supply = "vddi";
+	panel->regs[1].supply = "vdd";
+
+	ret = regulator_bulk_get(&pdev->dev, NUM_REGULATOR_CONSUMERS,
+			panel->regs);
+	if (ret != 0) {
+		dev_err(panel->dev, "failed to get regulators (%d)\n", ret);
+		goto err_regulator_bulk_get;
+	}
+
+	panel->bd = backlight_device_register("l5f31188_bd", &pdev->dev, panel,
+			&l5f31188_backlight_ops, NULL);
+	if (IS_ERR(panel->bd)) {
+		dev_err(&pdev->dev, "failed to register backlight ops.\n");
+		ret = PTR_ERR(panel->bd);
+		goto err_backlight_register;
+	}
+
+	panel->cabc_mode = CABC_OFF;
+	panel->bd->props.max_brightness = MAX_BRIGHTNESS;
+	panel->bd->props.brightness = MAX_BRIGHTNESS;
+
+	panel->entity.of_node = pdev->dev.of_node;
+	panel->entity.dev = &pdev->dev;
+	panel->entity.release = l5f31188_release;
+	panel->entity.ops = &l5f31188_control_ops;
+
+	platform_set_drvdata(pdev, panel);
+
+	ret = display_entity_register(&panel->entity);
+	if (ret < 0)
+		goto err_display_register;
+
+	display_entity_set_state(&panel->entity, DISPLAY_ENTITY_STATE_ON);
+
+	dev_dbg(&pdev->dev, "probed l5f31188 panel driver.\n");
+
+
+	return 0;
+
+err_display_register:
+	backlight_device_unregister(panel->bd);
+err_backlight_register:
+	regulator_bulk_free(NUM_REGULATOR_CONSUMERS, panel->regs);
+err_regulator_bulk_get:
+	kfree(panel);
+
+	return ret;
+}
+
+static int l5f31188_remove(struct platform_device *pdev)
+{
+	struct l5f31188 *panel = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+	display_entity_unregister(&panel->entity);
+
+	return 0;
+}
+
+static int l5f31188_suspend(struct device *dev)
+{
+	struct l5f31188 *panel = dev_get_drvdata(dev);
+
+	if (panel->power != FB_BLANK_UNBLANK)
+		return 0;
+
+	return display_entity_set_state(&panel->entity,
+			DISPLAY_ENTITY_STATE_OFF);
+}
+
+static int l5f31188_resume(struct device *dev)
+{
+	struct l5f31188 *panel = dev_get_drvdata(dev);
+
+	if (panel->power != FB_BLANK_UNBLANK)
+		return 0;
+
+	return display_entity_set_state(&panel->entity,
+			DISPLAY_ENTITY_STATE_ON);
+}
+
+static const struct dev_pm_ops l5f31188_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(l5f31188_suspend, l5f31188_resume)
+};
+
+static struct platform_driver l5f31188_driver = {
+	.probe = l5f31188_probe,
+	.remove = l5f31188_remove,
+	.driver = {
+		.name = "panel_l5f31188",
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(l5f31188_of_match),
+		.pm = &l5f31188_pm_ops,
+	}
+};
+
+module_platform_driver(l5f31188_driver);
+
+MODULE_AUTHOR("Hyungwon Hwang<human.hwang@samsung.com>");
+MODULE_DESCRIPTION("MIPI-DSI based l5f31188 TFT-LCD Panel Driver");
+MODULE_LICENSE("GPL");