背光电压5V，低，不知道在哪里提高电压，系统参数如下，请教下是背光问题吗？

pinctrl-0 = <&dsi4lane_pins_a>;
pinctrl-1 = <&dsi4lane_pins_b>;

PIO里需要改吗？
dsi4lane_pins_a: dsi4lane@0 {
allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
allwinner,function = "dsi";
allwinner,muxsel = <5>;
allwinner,drive = <3>;
allwinner,pull = <0>;
};

	dsi4lane_pins_b: dsi4lane@1 {
    	allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
    	allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "DP11";
    	allwinner,function = "io_disabled";
    	allwinner,muxsel = <0xf>;
    	allwinner,drive = <1>;
    	allwinner,pull = <0>;
};


显示屏驱动文件如下：
/* drivers/video/sunxi/disp2/disp/lcd/ST7796S.c
*

• Copyright (c) 2017 Allwinnertech Co., Ltd.
• Author: zhengxiaobin zhengxiaobin@allwinnertech.com
• he0801a-068 panel driver
• This program is free software; you can redistribute it and/or modify
• it under the terms of the GNU General Public License version 2 as
• published by the Free Software Foundation.

[lcd0]

• lcd_used = 1
• lcd_driver_name = "st7701s"
• lcd_bl_0_percent = 0
• lcd_bl_40_percent = 23
• lcd_bl_100_percent = 100
• lcd_backlight = 88
• lcd_if = 4
• lcd_x = 480
• lcd_y = 640
• lcd_width = 36
• lcd_height = 65
• lcd_dclk_freq = 25
• lcd_pwm_used = 1
• lcd_pwm_ch = 8
• lcd_pwm_freq = 50000
• lcd_pwm_pol = 1
• lcd_pwm_max_limit = 255
• lcd_hbp = 70
• lcd_ht = 615
• lcd_hspw = 8
• lcd_vbp = 30
• lcd_vt = 690
• lcd_vspw = 10
• lcd_dsi_if = 0
• lcd_dsi_lane = 2
• lcd_dsi_format = 0
• lcd_dsi_te = 0
• lcd_dsi_eotp = 0
• lcd_frm = 0
• lcd_io_phase = 0x0000
• lcd_hv_clk_phase = 0
• lcd_hv_sync_polarity= 0
• lcd_gamma_en = 0
• lcd_bright_curve_en = 0
• lcd_cmap_en = 0
• lcdgamma4iep = 22
• ;lcd_bl_en = port:PD09<1><0><default><1>
• lcd_power = "vcc-lcd"
• lcd_pin_power = "vcc18-dsi"
• lcd_pin_power1 = "vcc-pd"
• ;reset
• lcd_gpio_0 = port:PD09<1><0><default><1>
  */
  // written by Miller 2024-4-1
  #include "st7701s.h"

static void lcd_power_on(u32 sel);
static void lcd_power_off(u32 sel);
static void lcd_bl_open(u32 sel);
static void lcd_bl_close(u32 sel);

static void lcd_panel_init(u32 sel);
static void lcd_panel_exit(u32 sel);

#define panel_reset(sel, val) sunxi_lcd_gpio_set_value(sel, 0, val)

static void lcd_cfg_panel_info(struct panel_extend_para *info)
{
u32 i = 0, j = 0;
u32 items;
u8 lcd_gamma_tbl[][2] = {
{0, 0}, {15, 15}, {30, 30}, {45, 45}, {60, 60},
{75, 75}, {90, 90}, {105, 105}, {120, 120}, {135, 135},
{150, 150}, {165, 165}, {180, 180}, {195, 195}, {210, 210},
{225, 225}, {240, 240}, {255, 255},
};

u32 lcd_cmap_tbl[2][3][4] = {
    {
	{LCD_CMAP_G0, LCD_CMAP_B1, LCD_CMAP_G2, LCD_CMAP_B3},
	{LCD_CMAP_B0, LCD_CMAP_R1, LCD_CMAP_B2, LCD_CMAP_R3},
	{LCD_CMAP_R0, LCD_CMAP_G1, LCD_CMAP_R2, LCD_CMAP_G3},
    },
    {
	{LCD_CMAP_B3, LCD_CMAP_G2, LCD_CMAP_B1, LCD_CMAP_G0},
	{LCD_CMAP_R3, LCD_CMAP_B2, LCD_CMAP_R1, LCD_CMAP_B0},
	{LCD_CMAP_G3, LCD_CMAP_R2, LCD_CMAP_G1, LCD_CMAP_R0},
    },
};

items = sizeof(lcd_gamma_tbl) / 2;
for (i = 0; i < items - 1; i++) {
	u32 num = lcd_gamma_tbl[i + 1][0] - lcd_gamma_tbl[i][0];

	for (j = 0; j < num; j++) {
		u32 value = 0;

		value =
		    lcd_gamma_tbl[i][1] +
		    ((lcd_gamma_tbl[i + 1][1] - lcd_gamma_tbl[i][1]) *
		     j) /
			num;
		info->lcd_gamma_tbl[lcd_gamma_tbl[i][0] + j] =
		    (value << 16) + (value << 8) + value;
	}
}
info->lcd_gamma_tbl[255] = (lcd_gamma_tbl[items - 1][1] << 16) +
			   (lcd_gamma_tbl[items - 1][1] << 8) +
			   lcd_gamma_tbl[items - 1][1];

memcpy(info->lcd_cmap_tbl, lcd_cmap_tbl, sizeof(lcd_cmap_tbl));

}

static s32 lcd_open_flow(u32 sel)
{
LCD_OPEN_FUNC(sel, lcd_power_on, 0);
LCD_OPEN_FUNC(sel, lcd_panel_init, 120); //miller change 10-->120
LCD_OPEN_FUNC(sel, sunxi_lcd_tcon_enable, 10);
LCD_OPEN_FUNC(sel, lcd_bl_open, 200); //miller change 0--200
return 0;
}

static s32 lcd_close_flow(u32 sel)
{
LCD_CLOSE_FUNC(sel, lcd_bl_close, 0);
LCD_CLOSE_FUNC(sel, lcd_panel_exit, 10);
LCD_CLOSE_FUNC(sel, sunxi_lcd_tcon_disable, 0);
LCD_CLOSE_FUNC(sel, lcd_power_off, 0);

return 0;

}

static void lcd_power_on(u32 sel)
{
sunxi_lcd_pin_cfg(sel, 1);
sunxi_lcd_power_enable(sel, 0);
// sunxi_lcd_power_enable(sel, 1);
sunxi_lcd_delay_ms(40); //Miller change 10--->40

/* reset lcd by gpio */
panel_reset(sel, 1);
sunxi_lcd_delay_ms(5);  //Miller change 1--->5
panel_reset(sel, 0);
sunxi_lcd_delay_ms(30);   //Miller change 1--->30
panel_reset(sel, 1);
sunxi_lcd_delay_ms(10);

}

static void lcd_power_off(u32 sel)
{
sunxi_lcd_pin_cfg(sel, 0);
sunxi_lcd_delay_ms(1);
panel_reset(sel, 0);
sunxi_lcd_delay_ms(1);
sunxi_lcd_power_disable(sel, 0);
}

static void lcd_bl_open(u32 sel)
{
sunxi_lcd_pwm_enable(sel);
sunxi_lcd_backlight_enable(sel);
}

static void lcd_bl_close(u32 sel)
{
sunxi_lcd_backlight_disable(sel);
sunxi_lcd_pwm_disable(sel);
}

#define REGFLAG_DELAY 0XFE
#define REGFLAG_END_OF_TABLE 0xFC /* END OF REGISTERS MARKER */

struct LCM_setting_table {
u8 cmd;
u32 count;
u8 para_list[18];
};

static struct LCM_setting_table lcm_initialization_setting[] = {
{0x11, 1, {0x00} }, //miller turns off sleep
{REGFLAG_DELAY, 60, {} },

{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x13} },//miller add
{0xef, 1, {0x08} }, //Miller add
{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x10} }, //Miller 这里采用第二个0xFF
{0xc0, 2, {0x63, 0x00} }, //Miller change 0x4f-->0x63
{0xc1, 2, {0x0A, 0x0C} }, //Miller change 07 02 -->0a 0c
{0xc2, 2, {0x31, 0x08} }, //miller 31 05 --> 31 08
{0xcc, 1, {0x18} },       //miller 10  -->18

{0xb0, 16, {0x00, 0x08, 0x10, 0x0E, 0x11, 0x07, 0x08, 0x08, 0x08, 0x25,
	   0x04, 0x12, 0x0F, 0x2C, 0x30, 0x1F} },//Miller change

{0xb1, 16, {0x00, 0x11, 0x18, 0x0c, 0x10, 0x05, 0x07, 0x09, 0x08, 0x24,
	    0x04, 0x11, 0x10, 0x2B, 0x30, 0x1F} },

{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x11} },

{0xb0, 1, {0x4D} },//Miller 0x53-->0x4D
{0xb1, 1, {0x39} },// Miller 0x60-->0x39
{0xb2, 1, {0x87} },//miller 0x07--> 0x87
{0xb3, 1, {0x80} },//miller 0x08-->0x80
{0xb5, 1, {0x47} },//miller 0x49-->0x47
{0xb7, 1, {0x8A} },//miller 85--> 8A
{0xb8, 1, {0x20} },//miller 21---20
{0xb9, 2, {0x10, 0x13} },//miller
    {0xc0, 1, {0x09} }, //miller add
{0xc1, 1, {0x78} },
{0xc2, 1, {0x78} },// miller add
//{REGFLAG_DELAY, 50, {} }, //miller delete

{0xd0, 1, {0x88} },
    {REGFLAG_DELAY, 100, {} },  // miller add
{0xe0, 3, {0x00, 0x00, 0x02} },
{0xe1, 11, {0x04, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x20,
	    0x20} }, //miller
{0xe2, 13, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	    0x00, 0x00, 0x00} },//miller
{0xe3, 4, {0x00, 0x00, 0x33, 0x00} },//miller
{0xe4, 2, {0x22, 0x00} },//miller
{0xe5, 16, {0x04, 0x34, 0xaa, 0xaa, 0x06, 0x34, 0xaa, 0xaa, 0x00, 0x00,
	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },//miller

{0xe6, 4, {0x00, 0x00, 0x43, 0x00} }, //miller
{0xe7, 2, {0x22, 0x00} },  //miller
{0xe8, 16, {0x05, 0x35, 0xaa, 0xaa, 0x07, 0x35, 0xaa, 0xaa, 0x00, 0x00,
	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },//miller
{0xeb, 7, {0x02, 0x00, 0x40, 0x40, 0x00, 0x00, 0x00} },//miller

{0xec, 2, {0x00, 0x00} },//miller
{0xed, 16, {0xfa, 0x46, 0x0c, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	    0xff, 0xff, 0xff, 0xb1, 0x44, 0xbf} },//miller
{0xef, 6, {0x10, 0x0d, 0x04, 0x08, 0x3f, 0x1f} }, //Miller
{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x13} },       //miller
//{REGFLAG_DELAY, 50, {} },//miller delete
{0xe8, 2, {0x00, 0x0e} }, //miller add
{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x00} },       //miller add
{0x11, 1, {0x00} }, //miller add
{REGFLAG_DELAY, 120, {} },//miller add
{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x13} },       //miller add
{0xe8, 2, {0x00, 0x0c} }, //miller add
{REGFLAG_DELAY, 10, {} },//miller add
{0xe8, 2, {0x00, 0x00} }, //miller add
{0xff, 5, {0x77, 0x01, 0x00, 0x00, 0x00} },       //miller add
{0x29, 1, {0x00} },
{REGFLAG_DELAY, 20, {} },//miller add
{REGFLAG_END_OF_TABLE, 0x00, {} }

};

static void lcd_panel_init(u32 sel)
{
u32 i = 0;

sunxi_lcd_dsi_clk_enable(sel);
sunxi_lcd_delay_ms(10);

for (i = 0;; i++) {
	if (lcm_initialization_setting[i].cmd == REGFLAG_END_OF_TABLE)
		break;
	else if (lcm_initialization_setting[i].cmd == REGFLAG_DELAY)
		sunxi_lcd_delay_ms(lcm_initialization_setting[i].count);
	else {
		dsi_dcs_wr(0, lcm_initialization_setting[i].cmd,
			   lcm_initialization_setting[i].para_list,
			   lcm_initialization_setting[i].count);
	}
}

}

static void lcd_panel_exit(u32 sel)
{
sunxi_lcd_dsi_dcs_write_0para(sel, 0x28);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_dcs_write_0para(sel, 0x10);
sunxi_lcd_delay_ms(10);
}

/sel: 0:lcd0; 1:lcd1/
static s32 lcd_user_defined_func(u32 sel, u32 para1, u32 para2, u32 para3)
{
return 0;
}

struct __lcd_panel st7701s_panel = {
/* panel driver name, must mach the name of
* lcd_drv_name in sys_config.fex
*/
.name = "st7701s",
.func = {
.cfg_panel_info = lcd_cfg_panel_info,
.cfg_open_flow = lcd_open_flow,
.cfg_close_flow = lcd_close_flow,
.lcd_user_defined_func = lcd_user_defined_func,
},
};

dts 改动如下
&lcd0{

base_config_start   = <1>;
lcd_used            = <1>;

lcd_driver_name     = "st7701s";

lcd_bl_0_percent    = <0>;
lcd_bl_40_percent   = <23>;
lcd_bl_100_percent  = <100>;
lcd_backlight       = <150>;

lcd_if              = <4>;
lcd_x               = <800>;
lcd_y               = <480>;
lcd_width           = <94>;
lcd_height          = <56>;
lcd_dclk_freq       = <24>; //HT*VT*fps 

lcd_pwm_used        = <1>;
lcd_pwm_ch          = <9>;
lcd_pwm_freq        = <50000>;
lcd_pwm_pol         = <0>; // 0 active high
lcd_pwm_max_limit   = <255>;

lcd_hbp             = <86>;
lcd_ht              = <966>;
lcd_hspw            = <6>;
lcd_vbp             = <36>;
lcd_vt              = <546>;
lcd_vspw            = <6>;

lcd_dsi_if          = <0>;
lcd_dsi_lane        = <2>;
lcd_dsi_format      = <0>; //RGB888
lcd_dsi_te          = <0>;
lcd_dsi_eotp        = <0>;

lcd_frm             = <0>;
lcd_io_phase        = <0x0000>;
lcd_hv_clk_phase    = <0>;
lcd_hv_sync_polarity= <0>;
lcd_gamma_en        = <0>;
lcd_bright_curve_en = <0>;
lcd_cmap_en         = <0>;

lcdgamma4iep        = <22>;

lcd_gpio_0          = <&pio PD 19 1 0 3 1>;
lcd_gpio_1          = <&pio PD 20 1 0 3 1>;
pinctrl-0           = <&dsi2lane_pins_a>;
pinctrl-1           = <&dsi2lane_pins_b>;
base_config_end     = <1>;

};

&pio{
dsi2lane_pins_a: dsi2lane@0 {
allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6";
allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6";
allwinner,function = "dsi";
allwinner,muxsel = <5>;
allwinner,drive = <3>;
allwinner,pull = <0>;
};

dsi2lane_pins_b: dsi2lane@1 {
    allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6";
    allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6";
    allwinner,function = "io_disabled";
    allwinner,muxsel = <0xf>;
    allwinner,drive = <1>;
    allwinner,pull = <0>;
};

};

开发板：V853 vision
程序： LCD 驱动（ST7701S）
函数：static struct LCM_setting_table lcm_initialization_setting[] = {
如果只发命令： WriteComm (0x29);
可以写成 {0x29, 1, {0x00} },吗？

目录 /v853-sdk/package/gui/littlevgl-8/lv_g2d_test
主板 853 vision
函数
static void lv_g2d_test_bmp(char *path) {
static lv_obj_t *bmp_img;
bmp_img = lv_img_create(lv_scr_act());
lv_img_set_src(bmp_img, path);
lv_obj_center(bmp_img);

if (strcmp(lv_img_get_src(bmp_img), "A:/usr/share/lv_g2d_test/no.bmp")
        != 0) {
    static lv_anim_t bmp_anim;
    lv_anim_init(&bmp_anim);
    lv_anim_set_var(&bmp_anim, bmp_img);
    lv_anim_set_time(&bmp_anim, 3000);
    lv_anim_set_playback_time(&bmp_anim, 500);
    lv_anim_set_repeat_count(&bmp_anim, LV_ANIM_REPEAT_INFINITE);

    lv_anim_set_exec_cb(&bmp_anim, ofs_x_anim);
    lv_anim_set_values(&bmp_anim, 0, lv_obj_get_self_width(bmp_img));
    lv_anim_start(&bmp_anim);

    lv_anim_set_exec_cb(&bmp_anim, ofs_y_anim);
    lv_anim_set_values(&bmp_anim, 0, lv_obj_get_self_height(bmp_img));
    lv_anim_start(&bmp_anim);
}

}

@miller370321 不需要，V853 vision直接把helloworld 文件夹加在package 目录下，然后，source build/envsetup.sh lunch 16, make menuconfig 就可以看到hello world 了

板子 V853 visison ,按https://v853.docs.aw-ol.com/soft/soft_start/ 增加hellowrold，但找不到openwrt/package 目录啊