kernel_samsung_a34x-permissive/drivers/gpu/drm/panel/panel-tianma-nt36672c-cphy-vdo-90hz-rt4801-hfp.c

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

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

#include <linux/gpio/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_drm_graphics_base.h"
#include "../mediatek/mtk_log.h"
#include "../mediatek/mtk_panel_ext.h"
#endif
/* enable this to check panel self -bist pattern */
/* #define PANEL_BIST_PATTERN */
/****************TPS65132***********/
#include <linux/i2c-dev.h>
#include <linux/i2c.h>
//#include "lcm_i2c.h"

#define AVDD_REG 0x00
#define AVDD_REG 0x01
#define HFP_SUPPORT 1
#if HFP_SUPPORT
static int current_fps = 60;
#endif

/* i2c control start */
#define LCM_I2C_ID_NAME "I2C_LCD_BIAS"
static struct i2c_client *_lcm_i2c_client;
static char bl_tb0[] = { 0x51, 0xff };

/*****************************************************************************
 * Function Prototype
 *****************************************************************************/
static int _lcm_i2c_probe(struct i2c_client *client,
			  const struct i2c_device_id *id);
static int _lcm_i2c_remove(struct i2c_client *client);

/*****************************************************************************
 * Data Structure
 *****************************************************************************/
struct _lcm_i2c_dev {
	struct i2c_client *client;
};

static const struct of_device_id _lcm_i2c_of_match[] = {
	{
	    .compatible = "mediatek,I2C_LCD_BIAS",
	},
	{},
};

static const struct i2c_device_id _lcm_i2c_id[] = { { LCM_I2C_ID_NAME, 0 },
						    {} };

static struct i2c_driver _lcm_i2c_driver = {
	.id_table = _lcm_i2c_id,
	.probe = _lcm_i2c_probe,
	.remove = _lcm_i2c_remove,
	/* .detect		   = _lcm_i2c_detect, */
	.driver = {
		.owner = THIS_MODULE,
		.name = LCM_I2C_ID_NAME,
		.of_match_table = _lcm_i2c_of_match,
	},
};

/*****************************************************************************
 * Function
 *****************************************************************************/

#ifdef VENDOR_EDIT
// shifan@bsp.tp 20191226 add for loading tp fw when screen lighting on
extern void lcd_queue_load_tp_fw(void);
#endif /*VENDOR_EDIT*/

static int _lcm_i2c_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	pr_debug("[LCM][I2C] %s\n", __func__);
	pr_debug("[LCM][I2C] NT: info==>name=%s addr=0x%x\n", client->name,
		 client->addr);
	_lcm_i2c_client = client;
	return 0;
}

static int _lcm_i2c_remove(struct i2c_client *client)
{
	pr_debug("[LCM][I2C] %s\n", __func__);
	_lcm_i2c_client = NULL;
	i2c_unregister_device(client);
	return 0;
}

static int _lcm_i2c_write_bytes(unsigned char addr, unsigned char value)
{
	int ret = 0;
	struct i2c_client *client = _lcm_i2c_client;
	char write_data[2] = { 0 };

	if (client == NULL) {
		pr_debug("ERROR!! _lcm_i2c_client is null\n");
		return 0;
	}

	write_data[0] = addr;
	write_data[1] = value;
	ret = i2c_master_send(client, write_data, 2);
	if (ret < 0)
		pr_info("[LCM][ERROR] _lcm_i2c write data fail !!\n");

	return ret;
}

/*
 * module load/unload record keeping
 */
static int __init _lcm_i2c_init(void)
{
	pr_debug("[LCM][I2C] %s\n", __func__);
	i2c_add_driver(&_lcm_i2c_driver);
	pr_debug("[LCM][I2C] %s success\n", __func__);
	return 0;
}

static void __exit _lcm_i2c_exit(void)
{
	pr_debug("[LCM][I2C] %s\n", __func__);
	i2c_del_driver(&_lcm_i2c_driver);
}

module_init(_lcm_i2c_init);
module_exit(_lcm_i2c_exit);
/***********************************/

struct tianma {
	struct device *dev;
	struct drm_panel panel;
	struct backlight_device *backlight;
	struct gpio_desc *reset_gpio;
	struct gpio_desc *bias_pos;
	struct gpio_desc *bias_neg;
	bool prepared;
	bool enabled;

	int error;
};

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

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

static inline struct tianma *panel_to_tianma(struct drm_panel *panel)
{
	return container_of(panel, struct tianma, panel);
}

#ifdef PANEL_SUPPORT_READBACK
static int tianma_dcs_read(struct tianma *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 tianma_panel_get_data(struct tianma *ctx)
{
	u8 buffer[3] = { 0 };
	static int ret;

	pr_info("%s+\n", __func__);

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

static void tianma_dcs_write(struct tianma *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;
	}
}

static void tianma_panel_init(struct tianma *ctx)
{
	ctx->reset_gpio = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_HIGH);
	usleep_range(10 * 1000, 15 * 1000);
	gpiod_set_value(ctx->reset_gpio, 0);
	usleep_range(10 * 1000, 15 * 1000);
	gpiod_set_value(ctx->reset_gpio, 1);
	usleep_range(10 * 1000, 15 * 1000);
	devm_gpiod_put(ctx->dev, ctx->reset_gpio);
	pr_info("%s+\n", __func__);
#if HFP_SUPPORT
	pr_info("%s, fps:%d\n", __func__, current_fps);
	tianma_dcs_write_seq_static(ctx, 0xFF, 0x25);
	tianma_dcs_write_seq_static(ctx, 0xFB, 0x01);
	if (current_fps == 60)
		tianma_dcs_write_seq_static(ctx, 0x18, 0x21);
	else if (current_fps == 90)
		tianma_dcs_write_seq_static(ctx, 0x18, 0x20);
	else
		tianma_dcs_write_seq_static(ctx, 0x18, 0x21);
#endif

	tianma_dcs_write_seq_static(ctx, 0xFF, 0x10);
	msleep(100);
	tianma_dcs_write_seq_static(ctx, 0xFB, 0x01);
	tianma_dcs_write_seq_static(ctx, 0xBA, 0x02);
	tianma_dcs_write_seq_static(ctx, 0x35, 0x00);
	tianma_dcs_write_seq_static(ctx, 0xBB, 0x03);//lane_num
	tianma_dcs_write_seq_static(ctx, 0xC0, 0x00);
	tianma_dcs_write_seq_static(ctx, 0x11);
	msleep(120);
	/* Display On*/
	tianma_dcs_write_seq_static(ctx, 0x29);
	pr_info("%s-\n", __func__);
}

static int tianma_disable(struct drm_panel *panel)
{
	struct tianma *ctx = panel_to_tianma(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 tianma_unprepare(struct drm_panel *panel)
{

	struct tianma *ctx = panel_to_tianma(panel);

	pr_info("%s++\n", __func__);

	if (!ctx->prepared)
		return 0;

	tianma_dcs_write_seq_static(ctx, MIPI_DCS_ENTER_SLEEP_MODE);
	tianma_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_OFF);
	msleep(200);
	/*
	 * ctx->reset_gpio = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_HIGH);
	 * gpiod_set_value(ctx->reset_gpio, 0);
	 * devm_gpiod_put(ctx->dev, ctx->reset_gpio);
	 */
	ctx->bias_neg =
	    devm_gpiod_get_index(ctx->dev, "bias", 1, GPIOD_OUT_HIGH);
	gpiod_set_value(ctx->bias_neg, 0);
	devm_gpiod_put(ctx->dev, ctx->bias_neg);

	usleep_range(2000, 2001);

	ctx->bias_pos =
	    devm_gpiod_get_index(ctx->dev, "bias", 0, GPIOD_OUT_HIGH);
	gpiod_set_value(ctx->bias_pos, 0);
	devm_gpiod_put(ctx->dev, ctx->bias_pos);

	ctx->error = 0;
	ctx->prepared = false;

	return 0;
}

static int tianma_prepare(struct drm_panel *panel)
{
	struct tianma *ctx = panel_to_tianma(panel);
	int ret;

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

	// lcd reset H -> L -> L
	ctx->reset_gpio = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_HIGH);
	gpiod_set_value(ctx->reset_gpio, 1);
	usleep_range(10000, 10001);
	gpiod_set_value(ctx->reset_gpio, 0);
	msleep(20);
	gpiod_set_value(ctx->reset_gpio, 1);
	devm_gpiod_put(ctx->dev, ctx->reset_gpio);
	// end
	ctx->bias_pos =
	    devm_gpiod_get_index(ctx->dev, "bias", 0, GPIOD_OUT_HIGH);
	gpiod_set_value(ctx->bias_pos, 1);
	devm_gpiod_put(ctx->dev, ctx->bias_pos);

	usleep_range(2000, 2001);
	ctx->bias_neg =
	    devm_gpiod_get_index(ctx->dev, "bias", 1, GPIOD_OUT_HIGH);
	gpiod_set_value(ctx->bias_neg, 1);
	devm_gpiod_put(ctx->dev, ctx->bias_neg);
	_lcm_i2c_write_bytes(0x0, 0xf);
	_lcm_i2c_write_bytes(0x1, 0xf);
	tianma_panel_init(ctx);

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

	ctx->prepared = true;
#ifdef PANEL_SUPPORT_READBACK
	tianma_panel_get_data(ctx);
#endif

#ifdef VENDOR_EDIT
	// shifan@bsp.tp 20191226 add for loading tp fw when screen lighting on
	lcd_queue_load_tp_fw();
#endif

	pr_info("%s-\n", __func__);
	return ret;
}

static int tianma_enable(struct drm_panel *panel)
{
	struct tianma *ctx = panel_to_tianma(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;
}
#if HFP_SUPPORT
#define HFP_60HZ (940)
#define HFP_90HZ (252)
#define HSA (20)
#define HBP (22)
#define VFP (66)
#define VFP_45HZ (870)
#define VFP_60HZ (1306)
#define VSA (10)
#define VBP (4)
#define VAC (2400)
#define HAC (1080)
static const struct drm_display_mode default_mode = {
	.clock = 306826,
	.hdisplay = HAC,
	.hsync_start = HAC + HFP_60HZ,
	.hsync_end = HAC + HFP_60HZ + HSA,
	.htotal = HAC + HFP_60HZ + HSA + HBP,
	.vdisplay = VAC,
	.vsync_start = VAC + VFP,
	.vsync_end = VAC + VFP + VSA,
	.vtotal = VAC + VFP + VSA + VBP,
	.vrefresh = 60,
};

static const struct drm_display_mode performance_mode = {
	.clock = 306677,
	.hdisplay = HAC,
	.hsync_start = HAC + HFP_90HZ,
	.hsync_end = HAC + HFP_90HZ + HSA,
	.htotal = HAC + HFP_90HZ + HSA + HBP,
	.vdisplay = VAC,
	.vsync_start = VAC + VFP,
	.vsync_end = VAC + VFP + VSA,
	.vtotal = VAC + VFP + VSA + VBP,
	.vrefresh = 90,
};
#else
#define HFP (252)
#define HSA (20)
#define HBP (22)
#define VFP_45HZ (2500)
#define VFP_60HZ (1306)
#define VFP_90HZ (66)
#define VSA (10)
#define VBP (4)
#define VAC (2400)
#define HAC (1080)
static const struct drm_display_mode default_mode = {
	.clock = 306842,
	.hdisplay = HAC,
	.hsync_start = HAC + HFP,
	.hsync_end = HAC + HFP + HSA,
	.htotal = HAC + HFP + HSA + HBP,
	.vdisplay = VAC,
	.vsync_start = VAC + VFP_60HZ,
	.vsync_end = VAC + VFP_60HZ + VSA,
	.vtotal = VAC + VFP_60HZ + VSA + VBP,
	.vrefresh = 60,
};

static const struct drm_display_mode performance_mode = {
	.clock = 306677,
	.hdisplay = HAC,
	.hsync_start = HAC + HFP,
	.hsync_end = HAC + HFP + HSA,
	.htotal = HAC + HFP + HSA + HBP,
	.vdisplay = VAC,
	.vsync_start = VAC + VFP_90HZ,
	.vsync_end = VAC + VFP_90HZ + VSA,
	.vtotal = VAC + VFP_90HZ + VSA + VBP,
	.vrefresh = 90,
};
#endif

#if defined(CONFIG_MTK_PANEL_EXT)
static struct mtk_panel_params ext_params = {
	.pll_clk = 538,
	.vfp_low_power = VFP_45HZ,
	.cust_esd_check = 0,
	.esd_check_enable = 1,
	.lcm_esd_check_table[0] = {
		.cmd = 0x0A, .count = 1, .para_list[0] = 0x9C,
	},
	.is_cphy = 1,
	.data_rate = 1076,
	.dyn_fps = {
		.switch_en = 1,
#if HFP_SUPPORT
		.dfps_cmd_table[0] = {0, 2, {0xFF, 0x25} },
		.dfps_cmd_table[1] = {0, 2, {0xFB, 0x01} },
		.dfps_cmd_table[2] = {0, 2, {0x18, 0x21} },
		/*switch page for esd check*/
		.dfps_cmd_table[3] = {0, 2, {0xFF, 0x10} },
		.dfps_cmd_table[4] = {0, 2, {0xFB, 0x01} },
#else
		.vact_timing_fps = 90,
#endif
	},
	.phy_timcon = {
		.hs_zero = 35,
		.hs_trail = 26,
	},
};

static struct mtk_panel_params ext_params_90hz = {
	.pll_clk = 538,
	.vfp_low_power = VFP_60HZ,
	.cust_esd_check = 0,
	.esd_check_enable = 1,
	.lcm_esd_check_table[0] = {

		.cmd = 0x0A, .count = 1, .para_list[0] = 0x9C,
	},
	.is_cphy = 1,
	.data_rate = 1076,
	.dyn_fps = {
		.switch_en = 1,
#if HFP_SUPPORT
		.dfps_cmd_table[0] = {0, 2, {0xFF, 0x25} },
		.dfps_cmd_table[1] = {0, 2, {0xFB, 0x01} },
		.dfps_cmd_table[2] = {0, 2, {0x18, 0x20} },
		/*switch page for esd check*/
		.dfps_cmd_table[3] = {0, 2, {0xFF, 0x10} },
		.dfps_cmd_table[4] = {0, 2, {0xFB, 0x01} },
#else
		.vact_timing_fps = 90,
#endif
	},
	.phy_timcon = {
		.hs_zero = 35,
		.hs_trail = 26,
	},
};


static int panel_ata_check(struct drm_panel *panel)
{
	/* Customer test by own ATA tool */
	return 1;
}

static int tianma_setbacklight_cmdq(void *dsi, dcs_write_gce cb, void *handle,
				 unsigned int level)
{

	if (level > 255)
		level = 255;
	pr_info("%s backlight = -%d\n", __func__, level);
	bl_tb0[1] = (u8)level;
#if 0
	char bl_tb0[] = {0x51, 0xf, 0xff};

	if (level > 255)
		level = 255;

	level = level * 4095 / 255;
	bl_tb0[1] = ((level >> 8) & 0xf);
	bl_tb0[2] = (level & 0xff);
#endif
	if (!cb)
		return -1;

	cb(dsi, handle, bl_tb0, ARRAY_SIZE(bl_tb0));
	return 0;
}

struct drm_display_mode *get_mode_by_id_hfp(struct drm_panel *panel,
	unsigned int mode)
{
	struct drm_display_mode *m;
	unsigned int i = 0;

	list_for_each_entry(m, &panel->connector->modes, head) {
		if (i == mode)
			return m;
		i++;
	}
	return NULL;
}

static int mtk_panel_ext_param_set(struct drm_panel *panel, unsigned int mode)
{
	struct mtk_panel_ext *ext = find_panel_ext(panel);
	int ret = 0;
	struct drm_display_mode *m = get_mode_by_id_hfp(panel, mode);

	if (m->vrefresh == 60) {
		ext->params = &ext_params;
#if HFP_SUPPORT
		current_fps = 60;
#endif
	} else if (m->vrefresh == 90) {
		ext->params = &ext_params_90hz;
#if HFP_SUPPORT
		current_fps = 90;
#endif
	} else
		ret = 1;

	return ret;
}

static int mtk_panel_ext_param_get(struct mtk_panel_params *ext_para,
			 unsigned int mode)
{
	int ret = 0;

	if (mode == 0)
		ext_para = &ext_params;
	else if (mode == 1)
		ext_para = &ext_params_90hz;
	else
		ret = 1;

	return ret;

}

static void mode_switch_to_90(struct drm_panel *panel)
{
	struct tianma *ctx = panel_to_tianma(panel);

	tianma_dcs_write_seq_static(ctx, 0xFF, 0x25);
	tianma_dcs_write_seq_static(ctx, 0xFB, 0x01);
	tianma_dcs_write_seq_static(ctx, 0x18, 0x20);//90hz

}

static void mode_switch_to_60(struct drm_panel *panel)
{
	struct tianma *ctx = panel_to_tianma(panel);

	tianma_dcs_write_seq_static(ctx, 0xFF, 0x25);
	tianma_dcs_write_seq_static(ctx, 0xFB, 0x01);
	tianma_dcs_write_seq_static(ctx, 0x18, 0x21);
}

static int mode_switch(struct drm_panel *panel, unsigned int cur_mode,
		unsigned int dst_mode, enum MTK_PANEL_MODE_SWITCH_STAGE stage)
{
	int ret = 0;
	//struct drm_display_mode *m = get_mode_by_id(panel, dst_mode);

	pr_info("%s cur_mode = %d dst_mode %d\n", __func__, cur_mode, dst_mode);

	if (dst_mode == 60) { /* 60 switch to 120 */
		mode_switch_to_60(panel);
	} else if (dst_mode == 90) { /* 1200 switch to 60 */
		mode_switch_to_90(panel);
	} else
		ret = 1;

	return ret;
}

static int panel_ext_reset(struct drm_panel *panel, int on)
{
	struct tianma *ctx = panel_to_tianma(panel);

	ctx->reset_gpio =
		devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_HIGH);
	gpiod_set_value(ctx->reset_gpio, on);
	devm_gpiod_put(ctx->dev, ctx->reset_gpio);

	return 0;
}

static struct mtk_panel_funcs ext_funcs = {
	.reset = panel_ext_reset,
	.set_backlight_cmdq = tianma_setbacklight_cmdq,
	.ext_param_set = mtk_panel_ext_param_set,
	.ext_param_get = mtk_panel_ext_param_get,
	.mode_switch = mode_switch,
	.ata_check = panel_ata_check,
};
#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;

	/**
	 * @prepare: the time (in milliseconds) that it takes for the panel to
	 *	   become ready and start receiving video data
	 * @enable: the time (in milliseconds) that it takes for the panel to
	 *	  display the first valid frame after starting to receive
	 *	  video data
	 * @disable: the time (in milliseconds) that it takes for the panel to
	 *	   turn the display off (no content is visible)
	 * @unprepare: the time (in milliseconds) that it takes for the panel
	 *		 to power itself down completely
	 */
	struct {
		unsigned int prepare;
		unsigned int enable;
		unsigned int disable;
		unsigned int unprepare;
	} delay;
};

static int tianma_get_modes(struct drm_panel *panel)
{
	struct drm_display_mode *mode;
	struct drm_display_mode *mode2;

	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);

	mode2 = drm_mode_duplicate(panel->drm, &performance_mode);
	if (!mode2) {
		dev_info(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
			 performance_mode.hdisplay, performance_mode.vdisplay,
			 performance_mode.vrefresh);
		return -ENOMEM;
	}

	drm_mode_set_name(mode2);
	mode2->type = DRM_MODE_TYPE_DRIVER;
	drm_mode_probed_add(panel->connector, mode2);

	panel->connector->display_info.width_mm = 70;
	panel->connector->display_info.height_mm = 152;

	return 2;
}

static const struct drm_panel_funcs tianma_drm_funcs = {
	.disable = tianma_disable,
	.unprepare = tianma_unprepare,
	.prepare = tianma_prepare,
	.enable = tianma_enable,
	.get_modes = tianma_get_modes,
};

static int tianma_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct tianma *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;
	}

	pr_info("%s+\n", __func__);
	ctx = devm_kzalloc(dev, sizeof(struct tianma), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	mipi_dsi_set_drvdata(dsi, ctx);

	ctx->dev = dev;
	dsi->lanes = 3;
	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->bias_pos = devm_gpiod_get_index(dev, "bias", 0, GPIOD_OUT_HIGH);
	if (IS_ERR(ctx->bias_pos)) {
		dev_info(dev, "cannot get bias-gpios 0 %ld\n",
			 PTR_ERR(ctx->bias_pos));
		return PTR_ERR(ctx->bias_pos);
	}
	devm_gpiod_put(dev, ctx->bias_pos);

	ctx->bias_neg = devm_gpiod_get_index(dev, "bias", 1, GPIOD_OUT_HIGH);
	if (IS_ERR(ctx->bias_neg)) {
		dev_info(dev, "cannot get bias-gpios 1 %ld\n",
			 PTR_ERR(ctx->bias_neg));
		return PTR_ERR(ctx->bias_neg);
	}
	devm_gpiod_put(dev, ctx->bias_neg);
	ctx->prepared = true;
	ctx->enabled = true;
	drm_panel_init(&ctx->panel);
	ctx->panel.dev = dev;
	ctx->panel.funcs = &tianma_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

	pr_info("%s- tianma,nt36672c,cphy,vdo,90hz,rt4801\n", __func__);

	return ret;
}

static int tianma_remove(struct mipi_dsi_device *dsi)
{
	struct tianma *ctx = mipi_dsi_get_drvdata(dsi);

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

	return 0;
}

static const struct of_device_id tianma_of_match[] = {
	{
	    .compatible = "tianma,nt36672c,cphy,vdo,90hz,rt4801,hfp",
	},
	{}
};

MODULE_DEVICE_TABLE(of, tianma_of_match);

static struct mipi_dsi_driver tianma_driver = {
	.probe = tianma_probe,
	.remove = tianma_remove,
	.driver = {
		.name = "panel-tianma-nt36672c-cphy-vdo-90hz-rt4801-hfp",
		.owner = THIS_MODULE,
		.of_match_table = tianma_of_match,
	},
};

module_mipi_dsi_driver(tianma_driver);

MODULE_AUTHOR("Cui Zhang <cui.zhang@mediatek.com>");
MODULE_DESCRIPTION("tianma r66451 VDO Panel Driver");
MODULE_LICENSE("GPL v2");