这一款是720*720， 4Lane MIPI的，测试了较多参数，还是显示有点异常，看看各位友友有没有遇到类似的情况过， 请各位帮忙支招，谢谢。

规格书：
YX40005A.pdf

驱动IC：ST7703
卖家给的时序参数：

测试现象：
1、按照参数，时钟lcd_dclk_freq配置为36M，黑屏无显示。
2、降频为16M测试，可以显示画面，但拖影比较严重，显示也不清晰。
3、调节各个HBP/HFP等参数，好像无好转的迹象。

硬件上面应该没有烧坏或者其它问题。

dts:

&lcd0 {
	lcd_used            = <1>;

        lcd_driver_name     = "st7701s";
	lcd_backlight       = <100>;
	lcd_if              = <4>;

        lcd_pwm_used        = <0>;
	lcd_pwm_ch          = <7>;
	lcd_pwm_freq        = <1000>;
	lcd_pwm_pol         = <0>;
	lcd_pwm_max_limit   = <255>;

        lcd_x               = <720>;
	lcd_y               = <720>;
	lcd_width           = <72>;
	lcd_height          = <72>;
	lcd_dclk_freq       = <20>;     // lcd_ht * lcd_vt * 60
        lcd_dsi_lane        = <4>;
        pinctrl-0           = <&dsi4lane_pins_a>;
	pinctrl-1           = <&dsi4lane_pins_b>;

        lcd_hbp             = <30>;     // hsync back porch(pixel) + hsync plus width(pixel);
	lcd_ht              = <790>;    // hsync total cycle(pixel)
	lcd_hspw            = <4>;      // hsync plus width(pixel)
	lcd_vbp             = <26>;     // vsync back porch(line) + vysnc plus width(line)
	lcd_vt              = <776>;    // vysnc total cycle(line)
	lcd_vspw            = <6>;      // vysnc plus width(pixel)

        lcd_dsi_if          = <0>;
	lcd_lvds_if         = <0>;
	lcd_lvds_colordepth = <0>;
	lcd_lvds_mode       = <0>;
	lcd_frm             = <0>;
	lcd_hv_clk_phase    = <0>;
	lcd_hv_sync_polarity= <0>;
	lcd_io_phase        = <0x0000>;
	lcd_gamma_en        = <0>;
	lcd_bright_curve_en = <0>;
	lcd_cmap_en         = <0>;
	lcd_fsync_en        = <0>;
	lcd_fsync_act_time  = <1000>;
	lcd_fsync_dis_time  = <1000>;
	lcd_fsync_pol       = <0>;

	deu_mode            = <0>;
	lcdgamma4iep        = <22>;
	smart_color         = <90>;

	lcd_gpio_0 =  <&pio PB 2 GPIO_ACTIVE_HIGH>;
};

初始化参数：

static struct LCM_setting_table lcm_initialization_setting[] = {
	// {0x11, 1, {0x00} },
	{REGFLAG_DELAY, 500, {} },

    {0xB9, 3, {0xF1, 0x12, 0x83}},

    {0xBA, 27, {0x33, 0x81, 0x05, 0xF9, 0x0E, 0x0E, 0x20, 0x00, 0x00, 0x00,
                0x00, 0x00, 0x00, 0x00, 0x44, 0x25, 0x00, 0x91, 0x0A, 0x00,
                0x00, 0x02, 0x4F, 0xD1, 0x00, 0x00, 0x37}},

    {0xB8, 4,  {0x25, 0x22, 0x20, 0x03}},

    {0xBF, 3,  {0x02, 0x11, 0x00}},

    // set rgb()
    // {0xB3, 10, {0x10, 0x10, 0x0A, 0x50, 0x03, 0xFF, 0x00, 0x00, 0x00, 0x00}},

    {0xC0, 9,  {0x73, 0x73, 0x50, 0x50, 0x00, 0x00, 0x08, 0x70, 0x00}},

    {0xBC, 1,  {0x46}},

    {0xCC, 1,  {0x0B}},

    {0xB4, 1,  {0x80}},

    {0xB2, 3,  {0x3C, 0x12, 0x30}},

    {0xE3, 14, {0x07, 0x07, 0x0B, 0x0B, 0x03, 0x0B, 0x00, 0x00, 0x00, 0x00, 
                0xFF, 0x00, 0x40, 0x10}},

    {0xC1, 12, {0x65, 0x00, 0x32, 0x32, 0x77, 0xF1, 0xCC, 0xCC, 0x77, 0x77, 
                0x33, 0x33}},

    {0xB5, 2,  {0x0A, 0x0A}},

    {0xB6, 2,  {0xB7, 0xB7}},

    {0xE9, 63, {0x88, 0x10, 0x0A, 0x10, 0x0F, 0xA1, 0x80, 0x12, 0x31, 0x23, 
                0x47, 0x86, 0xA1, 0x80, 0x47, 0x08, 0x04, 0x44, 0x00, 0x00, 
                0x00, 0x00, 0x04, 0x44, 0x00, 0x00, 0x00, 0x00, 0x75, 0x31, 
                0x88, 0x88, 0x88, 0x1F, 0x88, 0x38, 0xFF, 0x58, 0x88, 0x64, 
                0x20, 0x88, 0x88, 0x88, 0x0F, 0x88, 0x28, 0xFF, 0x48, 0x88, 
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                0x00, 0x00, 0x00}},

    {0xEA, 61, {0x00, 0x1A, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 
                0x00, 0x00, 0x02, 0x46, 0x88, 0x88, 0x88, 0x28, 0x8F, 0x08, 
                0xFF, 0x48, 0x88, 0x13, 0x57, 0x88, 0x88, 0x88, 0x38, 0x8F, 
                0x18, 0xFF, 0x58, 0x88, 0x23, 0x00, 0x00, 0x01, 0x02, 0x00, 
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                0x00, 0x00, 0x00, 0x00, 0x40, 0xA1, 0x80, 0x00, 0x00, 0x00, 
                0x00}},

    {0xE0, 34, {0x00, 0x03, 0x06, 0x2D, 0x3E, 0x3F, 0x34, 0x32, 0x08, 0x0C, 
                0x0D, 0x10, 0x12, 0x11, 0x12, 0x10, 0x15, 0x00, 0x03, 0x06, 
                0x2D, 0x3E, 0x3F, 0x34, 0x32, 0x08, 0x0C, 0x0D, 0x10, 0x12, 
                0x11, 0x12, 0x10, 0x15}},

    {0x11, 1, {0x00} },
	{REGFLAG_DELAY, 300, {} },

	{0x29, 1, {0x00} },
    {REGFLAG_DELAY, 100, {} },
	{REGFLAG_END_OF_TABLE, 0x00, {}}
};

附几张异常现象的照片：