kernel_samsung_a34x-permissive/drivers/gpu/drm/panel/panel-sc-nt36672c-vdo-60hz.c

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2019 MediaTek Inc.
*/

#include <linux/backlight.h>
#include <drm/drmP.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>

#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>

#include <video/mipi_display.h>
#include <video/of_videomode.h>
#include <video/videomode.h>

#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>

#define CONFIG_MTK_PANEL_EXT
#if defined(CONFIG_MTK_PANEL_EXT)
#include "../mediatek/mtk_panel_ext.h"
#include "../mediatek/mtk_log.h"
#include "../mediatek/mtk_drm_graphics_base.h"
#endif

#ifdef CONFIG_MTK_ROUND_CORNER_SUPPORT
#include "../mediatek/mtk_corner_pattern/mtk_data_hw_roundedpattern.h"
#endif

struct lcm {
	struct device *dev;
	struct drm_panel panel;
	struct backlight_device *backlight;
	struct gpio_desc *reset_gpio;

	bool prepared;
	bool enabled;

	int error;
};

#define lcm_dcs_write_seq(ctx, seq...) \
({\
	const u8 d[] = { seq };\
	BUILD_BUG_ON_MSG(ARRAY_SIZE(d) > 64, "DCS sequence too big for stack");\
	lcm_dcs_write(ctx, d, ARRAY_SIZE(d));\
})

#define lcm_dcs_write_seq_static(ctx, seq...) \
({\
	static const u8 d[] = { seq };\
	lcm_dcs_write(ctx, d, ARRAY_SIZE(d));\
})

static inline struct lcm *panel_to_lcm(struct drm_panel *panel)
{
	return container_of(panel, struct lcm, panel);
}

static void lcm_dcs_write(struct lcm *ctx, const void *data, size_t len)
{
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	ssize_t ret;
	char *addr;

	if (ctx->error < 0)
		return;

	addr = (char *)data;
	if ((int)*addr < 0xB0)
		ret = mipi_dsi_dcs_write_buffer(dsi, data, len);
	else
		ret = mipi_dsi_generic_write(dsi, data, len);
	if (ret < 0) {
		dev_info(ctx->dev, "error %zd writing seq: %ph\n", ret, data);
		ctx->error = ret;
	}
}

#ifdef PANEL_SUPPORT_READBACK
static int lcm_dcs_read(struct lcm *ctx, u8 cmd, void *data, size_t len)
{
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	ssize_t ret;

	if (ctx->error < 0)
		return 0;

	ret = mipi_dsi_dcs_read(dsi, cmd, data, len);
	if (ret < 0) {
		dev_info(ctx->dev, "error %d reading dcs seq:(%#x)\n",
		ret, cmd);
		ctx->error = ret;
	}

	return ret;
}

static void lcm_panel_get_data(struct lcm *ctx)
{
	u8 buffer[3] = {0};
	static int ret;

	if (ret == 0) {
		ret = lcm_dcs_read(ctx,  0x0A, buffer, 1);
		dev_info(ctx->dev, "return %d data(0x%08x) to dsi engine\n",
			ret, buffer[0] | (buffer[1] << 8));
	}
}
#endif

#if defined(CONFIG_RT5081_PMU_DSV) || defined(CONFIG_MT6370_PMU_DSV)
static struct regulator *disp_bias_pos;
static struct regulator *disp_bias_neg;


static int lcm_panel_bias_regulator_init(void)
{
	static int regulator_inited;
	int ret = 0;

	if (regulator_inited)
		return ret;

	/* please only get regulator once in a driver */
	disp_bias_pos = regulator_get(NULL, "dsv_pos");
	if (IS_ERR(disp_bias_pos)) { /* handle return value */
		ret = PTR_ERR(disp_bias_pos);
		dev_info("get dsv_pos fail, error: %d\n", ret);
		return ret;
	}

	disp_bias_neg = regulator_get(NULL, "dsv_neg");
	if (IS_ERR(disp_bias_neg)) { /* handle return value */
		ret = PTR_ERR(disp_bias_neg);
		dev_info("get dsv_neg fail, error: %d\n", ret);
		return ret;
	}

	regulator_inited = 1;
	return ret; /* must be 0 */

}

static int lcm_panel_bias_enable(void)
{
	int ret = 0;
	int retval = 0;

	lcm_panel_bias_regulator_init();

	/* set voltage with min & max*/
	ret = regulator_set_voltage(disp_bias_pos, 5400000, 5400000);
	if (ret < 0)
		dev_info("set voltage disp_bias_pos fail, ret = %d\n", ret);
	retval |= ret;

	ret = regulator_set_voltage(disp_bias_neg, 5400000, 5400000);
	if (ret < 0)
		dev_info("set voltage disp_bias_neg fail, ret = %d\n", ret);
	retval |= ret;

	/* enable regulator */
	ret = regulator_enable(disp_bias_pos);
	if (ret < 0)
		dev_info("enable regulator disp_bias_pos fail, ret = %d\n",
			ret);
	retval |= ret;

	ret = regulator_enable(disp_bias_neg);
	if (ret < 0)
		dev_info("enable regulator disp_bias_neg fail, ret = %d\n",
			ret);
	retval |= ret;

	return retval;
}

static int lcm_panel_bias_disable(void)
{
	int ret = 0;
	int retval = 0;

	lcm_panel_bias_regulator_init();

	ret = regulator_disable(disp_bias_neg);
	if (ret < 0)
		dev_info("disable regulator disp_bias_neg fail, ret = %d\n",
			ret);
	retval |= ret;

	ret = regulator_disable(disp_bias_pos);
	if (ret < 0)
		dev_info("disable regulator disp_bias_pos fail, ret = %d\n",
			ret);
	retval |= ret;

	return retval;
}
#endif

static void lcm_panel_init(struct lcm *ctx)
{
	ctx->reset_gpio =
		devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(ctx->reset_gpio)) {
		dev_info(ctx->dev, "%s: cannot get reset-gpios %ld\n",
			__func__, PTR_ERR(ctx->reset_gpio));
		return;
	}
	gpiod_set_value(ctx->reset_gpio, 0);
	udelay(15 * 1000);
	gpiod_set_value(ctx->reset_gpio, 1);
	udelay(10 * 1000);
	gpiod_set_value(ctx->reset_gpio, 0);
	udelay(10 * 1000);
	gpiod_set_value(ctx->reset_gpio, 1);
	udelay(10 * 1000);
	devm_gpiod_put(ctx->dev, ctx->reset_gpio);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X10);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	//DSC ON && set PPS
	lcm_dcs_write_seq_static(ctx, 0xC0, 0x03);
	lcm_dcs_write_seq_static(ctx, 0xC1, 0x89, 0x28, 0x00, 0x08, 0x00, 0xAA,
				0x02, 0x0E, 0x00, 0x2B, 0x00, 0x07, 0x0D, 0xB7,
				0x0C, 0xB7);
	lcm_dcs_write_seq_static(ctx, 0xC2, 0x1B, 0XA0);

	lcm_dcs_write_seq_static(ctx, 0xFF, 0X20);
	lcm_dcs_write_seq_static(ctx, 0xFB, 0x01);
	lcm_dcs_write_seq_static(ctx, 0X01, 0X66);
	lcm_dcs_write_seq_static(ctx, 0X32, 0X4D);
	lcm_dcs_write_seq_static(ctx, 0X69, 0XD1);
	lcm_dcs_write_seq_static(ctx, 0XF2, 0X64);
	lcm_dcs_write_seq_static(ctx, 0XF4, 0X64);
	lcm_dcs_write_seq_static(ctx, 0XF6, 0X64);
	lcm_dcs_write_seq_static(ctx, 0XF9, 0X64);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X26);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X81, 0X0E);
	lcm_dcs_write_seq_static(ctx, 0X84, 0X03);
	lcm_dcs_write_seq_static(ctx, 0X86, 0X03);
	lcm_dcs_write_seq_static(ctx, 0X88, 0X07);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X27);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0XE3, 0X01);
	lcm_dcs_write_seq_static(ctx, 0XE4, 0XEC);
	lcm_dcs_write_seq_static(ctx, 0XE5, 0X02);
	lcm_dcs_write_seq_static(ctx, 0XE6, 0XE3);
	lcm_dcs_write_seq_static(ctx, 0XE7, 0X01);
	lcm_dcs_write_seq_static(ctx, 0XE8, 0XEC);
	lcm_dcs_write_seq_static(ctx, 0XE9, 0X02);
	lcm_dcs_write_seq_static(ctx, 0XEA, 0X22);
	lcm_dcs_write_seq_static(ctx, 0XEB, 0X03);
	lcm_dcs_write_seq_static(ctx, 0XEC, 0X32);
	lcm_dcs_write_seq_static(ctx, 0XED, 0X02);
	lcm_dcs_write_seq_static(ctx, 0XEE, 0X22);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X2A);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X0C, 0X04);
	lcm_dcs_write_seq_static(ctx, 0X0F, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X11, 0XE0);
	lcm_dcs_write_seq_static(ctx, 0X15, 0X0E);
	lcm_dcs_write_seq_static(ctx, 0X16, 0X78);
	lcm_dcs_write_seq_static(ctx, 0X19, 0X0D);
	lcm_dcs_write_seq_static(ctx, 0X1A, 0XF4);
	lcm_dcs_write_seq_static(ctx, 0X37, 0X6E);
	lcm_dcs_write_seq_static(ctx, 0X88, 0X76);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X2C);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X4D, 0X1E);
	lcm_dcs_write_seq_static(ctx, 0X4E, 0X04);
	lcm_dcs_write_seq_static(ctx, 0X4F, 0X00);
	lcm_dcs_write_seq_static(ctx, 0X9D, 0X1E);
	lcm_dcs_write_seq_static(ctx, 0X9E, 0X04);
	lcm_dcs_write_seq_static(ctx, 0X9F, 0X17);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0XF0);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X5A, 0X00);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0XE0);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X25, 0X02);
	lcm_dcs_write_seq_static(ctx, 0X4E, 0X02);
	lcm_dcs_write_seq_static(ctx, 0X85, 0X02);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0XD0);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X09, 0XAD);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X20);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0XF8, 0X64);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X2A);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X1A, 0XF0);
	lcm_dcs_write_seq_static(ctx, 0X30, 0X5E);
	lcm_dcs_write_seq_static(ctx, 0X31, 0XCA);
	lcm_dcs_write_seq_static(ctx, 0X34, 0XFE);
	lcm_dcs_write_seq_static(ctx, 0X35, 0X35);
	lcm_dcs_write_seq_static(ctx, 0X36, 0XA2);
	lcm_dcs_write_seq_static(ctx, 0X37, 0XF8);
	lcm_dcs_write_seq_static(ctx, 0X38, 0X37);
	lcm_dcs_write_seq_static(ctx, 0X39, 0XA0);
	lcm_dcs_write_seq_static(ctx, 0X3A, 0X5E);
	lcm_dcs_write_seq_static(ctx, 0X53, 0XD7);
	lcm_dcs_write_seq_static(ctx, 0X88, 0X72);
	lcm_dcs_write_seq_static(ctx, 0X88, 0X72);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X24);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0XC6, 0XC0);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0XE0);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X25, 0X00);
	lcm_dcs_write_seq_static(ctx, 0X4E, 0X02);
	lcm_dcs_write_seq_static(ctx, 0X35, 0X82);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0XC0);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X9C, 0X11);
	lcm_dcs_write_seq_static(ctx, 0X9D, 0X11);
	//60HZ
	lcm_dcs_write_seq_static(ctx, 0XFF, 0X25);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0X18, 0X22);

	lcm_dcs_write_seq_static(ctx, 0XFF, 0X10);
	lcm_dcs_write_seq_static(ctx, 0XFB, 0X01);
	lcm_dcs_write_seq_static(ctx, 0XC0, 0X03);
	lcm_dcs_write_seq_static(ctx, 0x51, 0x00);
	lcm_dcs_write_seq_static(ctx, 0x35, 0x00);
	lcm_dcs_write_seq_static(ctx, 0x53, 0x24);
	lcm_dcs_write_seq_static(ctx, 0x55, 0x00);
	lcm_dcs_write_seq_static(ctx, 0xFF, 0x10);

	lcm_dcs_write_seq_static(ctx, 0x11);
	msleep(140);
	lcm_dcs_write_seq_static(ctx, 0x29);
	msleep(40);
}

static int lcm_disable(struct drm_panel *panel)
{
	struct lcm *ctx = panel_to_lcm(panel);

	if (!ctx->enabled)
		return 0;

	if (ctx->backlight) {
		ctx->backlight->props.power = FB_BLANK_POWERDOWN;
		backlight_update_status(ctx->backlight);
	}

	ctx->enabled = false;

	return 0;
}

static int lcm_unprepare(struct drm_panel *panel)
{
	struct lcm *ctx = panel_to_lcm(panel);

	if (!ctx->prepared)
		return 0;

	lcm_dcs_write_seq_static(ctx, 0x28);
	lcm_dcs_write_seq_static(ctx, 0x10);
	msleep(120);
	lcm_dcs_write_seq_static(ctx, 0x4F, 0x01);
	msleep(120);

	ctx->error = 0;
	ctx->prepared = false;
#if defined(CONFIG_RT5081_PMU_DSV) || defined(CONFIG_MT6370_PMU_DSV)
	lcm_panel_bias_disable();
#endif

	return 0;
}

static int lcm_prepare(struct drm_panel *panel)
{
	struct lcm *ctx = panel_to_lcm(panel);
	int ret;

	pr_info("%s\n", __func__);
	if (ctx->prepared)
		return 0;

#if defined(CONFIG_RT5081_PMU_DSV) || defined(CONFIG_MT6370_PMU_DSV)
	lcm_panel_bias_enable();
#endif

	lcm_panel_init(ctx);

	ret = ctx->error;
	if (ret < 0)
		lcm_unprepare(panel);

	ctx->prepared = true;

#if defined(CONFIG_MTK_PANEL_EXT)
	mtk_panel_tch_rst(panel);
#endif
#ifdef PANEL_SUPPORT_READBACK
	lcm_panel_get_data(ctx);
#endif

	return ret;
}

static int lcm_enable(struct drm_panel *panel)
{
	struct lcm *ctx = panel_to_lcm(panel);

	if (ctx->enabled)
		return 0;

	if (ctx->backlight) {
		ctx->backlight->props.power = FB_BLANK_UNBLANK;
		backlight_update_status(ctx->backlight);
	}

	ctx->enabled = true;

	return 0;
}

#define VAC (2400)
#define HAC (1080)
#define HFP (165)
#define HSA (22)
#define HBP (22)
#define VFP (54)
#define VSA (10)
#define VBP (10)

static u32 fake_heigh = 2400;
static u32 fake_width = 1080;
static bool need_fake_resolution;

static struct drm_display_mode default_mode = {
	.clock = 172329,
	.hdisplay = 1080,
	.hsync_start = 1080 + HFP,
	.hsync_end = 1080 + HFP + HSA,
	.htotal = 1080 + HFP + HSA + HBP,
	.vdisplay = 2400,
	.vsync_start = 2400 + VFP,
	.vsync_end = 2400 + VFP + VSA,
	.vtotal = 2400 + VFP + VSA + VBP,
	.vrefresh = 60,
};

#if defined(CONFIG_MTK_PANEL_EXT)
static struct mtk_panel_params ext_params = {
	.vfp_low_power = 876,//45hz
	.cust_esd_check = 0,
	.esd_check_enable = 1,
	.lcm_esd_check_table[0] = {
		.cmd = 0x0A, .count = 1, .para_list[0] = 0x9C,
	},
	.data_rate = 548,
	.output_mode = MTK_PANEL_DSC_SINGLE_PORT,
	.dsc_params = {
		.enable = 1,
		.ver = 17,
		.slice_mode = 1,
		.rgb_swap = 0,
		.dsc_cfg = 34,
		.rct_on = 1,
		.bit_per_channel = 8,
		.dsc_line_buf_depth = 9,
		.bp_enable = 1,
		.bit_per_pixel = 128,
		.pic_height = 2400,
		.pic_width = 1080,
		.slice_height = 8,
		.slice_width = 540,
		.chunk_size = 540,
		.xmit_delay = 170,
		.dec_delay = 526,
		.scale_value = 32,
		.increment_interval = 43,
		.decrement_interval = 7,
		.line_bpg_offset = 12,
		.nfl_bpg_offset = 3511,
		.slice_bpg_offset = 3255,
		.initial_offset = 6144,
		.final_offset = 7072,
		.flatness_minqp = 3,
		.flatness_maxqp = 12,
		.rc_model_size = 8192,
		.rc_edge_factor = 6,
		.rc_quant_incr_limit0 = 11,
		.rc_quant_incr_limit1 = 11,
		.rc_tgt_offset_hi = 3,
		.rc_tgt_offset_lo = 3,
		},
};

static int panel_ext_reset(struct drm_panel *panel, int on)
{
	struct lcm *ctx = panel_to_lcm(panel);

	ctx->reset_gpio =
		devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(ctx->reset_gpio)) {
		dev_info(ctx->dev, "%s: cannot get reset-gpios %ld\n",
			__func__, PTR_ERR(ctx->reset_gpio));
		return PTR_ERR(ctx->reset_gpio);
	}
	gpiod_set_value(ctx->reset_gpio, on);
	devm_gpiod_put(ctx->dev, ctx->reset_gpio);

	return 0;
}

static int panel_ata_check(struct drm_panel *panel)
{
	pr_info("%s success\n", __func__);
	return 1;
}

static int lcm_setbacklight_cmdq(void *dsi, dcs_write_gce cb,
	void *handle, unsigned int level)
{
	char bl_tb0[] = {0x51, 0xFF};

	bl_tb0[1] = level;

	if (!cb)
		return -1;

	cb(dsi, handle, bl_tb0, ARRAY_SIZE(bl_tb0));

	return 0;
}

static int lcm_get_virtual_heigh(void)
{
	return VAC;
}

static int lcm_get_virtual_width(void)
{
	return HAC;
}

static struct mtk_panel_funcs ext_funcs = {
	.reset = panel_ext_reset,
	.set_backlight_cmdq = lcm_setbacklight_cmdq,
	.ata_check = panel_ata_check,
	.get_virtual_heigh = lcm_get_virtual_heigh,
	.get_virtual_width = lcm_get_virtual_width,
};
#endif

struct panel_desc {
	const struct drm_display_mode *modes;
	unsigned int num_modes;

	unsigned int bpc;

	struct {
		unsigned int width;
		unsigned int height;
	} size;

	struct {
		unsigned int prepare;
		unsigned int enable;
		unsigned int disable;
		unsigned int unprepare;
	} delay;
};

static void change_drm_disp_mode_params(struct drm_display_mode *mode)
{
	if (fake_heigh > 0 && fake_heigh < VAC) {
		mode->vsync_start = mode->vsync_start - mode->vdisplay
					+ fake_heigh;
		mode->vsync_end = mode->vsync_end - mode->vdisplay + fake_heigh;
		mode->vtotal = mode->vtotal - mode->vdisplay + fake_heigh;
		mode->vdisplay = fake_heigh;
	}
	if (fake_width > 0 && fake_width < HAC) {
		mode->hsync_start = mode->hsync_start - mode->hdisplay
					+ fake_width;
		mode->hsync_end = mode->hsync_end - mode->hdisplay + fake_width;
		mode->htotal = mode->htotal - mode->hdisplay + fake_width;
		mode->hdisplay = fake_width;
	}
}

static int lcm_get_modes(struct drm_panel *panel)
{
	struct drm_display_mode *mode;

	if (need_fake_resolution)
		change_drm_disp_mode_params(&default_mode);

	mode = drm_mode_duplicate(panel->drm, &default_mode);
	if (!mode) {
		dev_info(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
			default_mode.hdisplay, default_mode.vdisplay,
			default_mode.vrefresh);
		return -ENOMEM;
	}

	drm_mode_set_name(mode);
	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
	drm_mode_probed_add(panel->connector, mode);

	panel->connector->display_info.width_mm = 64;
	panel->connector->display_info.height_mm = 129;

	return 1;
}

static const struct drm_panel_funcs lcm_drm_funcs = {
	.disable = lcm_disable,
	.unprepare = lcm_unprepare,
	.prepare = lcm_prepare,
	.enable = lcm_enable,
	.get_modes = lcm_get_modes,
};

static void check_is_need_fake_resolution(struct device *dev)
{
	unsigned int ret = 0;

	ret = of_property_read_u32(dev->of_node, "fake_heigh", &fake_heigh);
	if (ret)
		need_fake_resolution = false;
	ret = of_property_read_u32(dev->of_node, "fake_width", &fake_width);
	if (ret)
		need_fake_resolution = false;
	if (fake_heigh > 0 && fake_heigh < VAC)
		need_fake_resolution = true;
	if (fake_width > 0 && fake_width < HAC)
		need_fake_resolution = true;
}

static int lcm_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct lcm *ctx;
	struct device_node *backlight;
	int ret;
	struct device_node *dsi_node, *remote_node = NULL, *endpoint = NULL;

	dsi_node = of_get_parent(dev->of_node);
	if (dsi_node) {
		endpoint = of_graph_get_next_endpoint(dsi_node, NULL);
		if (endpoint) {
			remote_node = of_graph_get_remote_port_parent(endpoint);
			if (!remote_node) {
				pr_info("No panel connected,skip probe lcm\n");
				return -ENODEV;
			}
			pr_info("device node name:%s\n", remote_node->name);
		}
	}
	if (remote_node != dev->of_node) {
		pr_info("%s+ skip probe due to not current lcm\n", __func__);
		return -ENODEV;
	}

	ctx = devm_kzalloc(dev, sizeof(struct lcm), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	mipi_dsi_set_drvdata(dsi, ctx);

	ctx->dev = dev;
	dsi->lanes = 4;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO
					| MIPI_DSI_MODE_VIDEO_SYNC_PULSE
					| MIPI_DSI_MODE_LPM
					| MIPI_DSI_MODE_EOT_PACKET
					| MIPI_DSI_CLOCK_NON_CONTINUOUS;

	backlight = of_parse_phandle(dev->of_node, "backlight", 0);
	if (backlight) {
		ctx->backlight = of_find_backlight_by_node(backlight);
		of_node_put(backlight);

		if (!ctx->backlight)
			return -EPROBE_DEFER;
	}

	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(ctx->reset_gpio)) {
		dev_info(dev, "cannot get reset-gpios %ld\n",
			PTR_ERR(ctx->reset_gpio));
		return PTR_ERR(ctx->reset_gpio);
	}
	devm_gpiod_put(dev, ctx->reset_gpio);
	ctx->prepared = true;
	ctx->enabled = true;

	drm_panel_init(&ctx->panel);
	ctx->panel.dev = dev;
	ctx->panel.funcs = &lcm_drm_funcs;

	ret = drm_panel_add(&ctx->panel);
	if (ret < 0)
		return ret;

	ret = mipi_dsi_attach(dsi);
	if (ret < 0)
		drm_panel_remove(&ctx->panel);

#if defined(CONFIG_MTK_PANEL_EXT)
	mtk_panel_tch_handle_reg(&ctx->panel);
	ret = mtk_panel_ext_create(dev, &ext_params, &ext_funcs, &ctx->panel);
	if (ret < 0)
		return ret;
#endif
	check_is_need_fake_resolution(dev);
	pr_info("%s-\n", __func__);

	return ret;
}

static int lcm_remove(struct mipi_dsi_device *dsi)
{
	struct lcm *ctx = mipi_dsi_get_drvdata(dsi);

	mipi_dsi_detach(dsi);
	drm_panel_remove(&ctx->panel);

	return 0;
}

static const struct of_device_id lcm_of_match[] = {
	{ .compatible = "sc,nt36672c,dphy,vdo,60hz", },
	{ }
};

MODULE_DEVICE_TABLE(of, lcm_of_match);

static struct mipi_dsi_driver lcm_driver = {
	.probe = lcm_probe,
	.remove = lcm_remove,
	.driver = {
		.name = "panel-sc-nt36672c-dphy-vdo-60hz",
		.owner = THIS_MODULE,
		.of_match_table = lcm_of_match,
	},
};

module_mipi_dsi_driver(lcm_driver);

MODULE_AUTHOR("MEDIATEK");
MODULE_DESCRIPTION("sc nt36672c VDO LCD Panel Driver");
MODULE_LICENSE("GPL v2");