第一次调试D1 MIPI DSI 发现一些奇怪问题，也不知道到底是哪里出了问题。。。

100ask LV 6

最近想给D1配一款MIPI显示屏，但是在调试过程中出现了一些很奇怪得现象，因为是第一次接触MIPI显示屏，所以有点不知所以。。

其中屏幕使用的是 ILI9806E DSI接口分辨率为480x800

目前认为主要是屏幕时序不对导致的问题，但是屏厂能提供的资料非常有限，还是需要慢慢排查....

设备树节点定义

&lcd0 {
        lcd_used            = <1>;

        lcd_driver_name     = "tft08006";
        lcd_backlight       = <100>;
        lcd_if              = <4>;

        lcd_x               = <480>;
        lcd_y               = <800>;
        lcd_width           = <52>;
        lcd_height          = <52>;
        lcd_dclk_freq       = <25>;

        lcd_pwm_used        = <1>;
        lcd_pwm_ch          = <2>;
        lcd_pwm_freq        = <1000>;
        lcd_pwm_pol         = <0>;
        lcd_pwm_max_limit   = <255>;

        lcd_hbp             = <20>;
        lcd_ht              = <835>;
        lcd_hspw            = <10>;
		
        lcd_vbp             = <20>;
        lcd_vt              = <510>;
        lcd_vspw            = <5>;

        lcd_dsi_if          = <0>;
        lcd_dsi_lane        = <2>;
        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 PG 13 GPIO_ACTIVE_HIGH>;
        pinctrl-0 = <&dsi4lane_pins_a>;
        pinctrl-1 = <&dsi4lane_pins_b>;
};

驱动示例定义

/* drivers/video/sunxi/disp2/disp/lcd/tft08006.c
 *
 * Copyright (c) 2021 Allwinnertech Co., Ltd.
 *
 * tft08006 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.
*/

#include "tft08006.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, 10);
	LCD_OPEN_FUNC(sel, lcd_panel_init, 10);
	LCD_OPEN_FUNC(sel, sunxi_lcd_tcon_enable, 50);
	LCD_OPEN_FUNC(sel, lcd_bl_open, 0);

	return 0;
}

static s32 lcd_close_flow(u32 sel)
{
	LCD_CLOSE_FUNC(sel, lcd_bl_close, 0);
	LCD_CLOSE_FUNC(sel, sunxi_lcd_tcon_disable, 0);
	LCD_CLOSE_FUNC(sel, lcd_panel_exit, 200);
	LCD_CLOSE_FUNC(sel, lcd_power_off, 500);

	return 0;
}

static void lcd_power_on(u32 sel)
{
	panel_reset(sel, 1);
	sunxi_lcd_delay_ms(10);
	panel_reset(sel, 0);
	sunxi_lcd_delay_ms(5);
	panel_reset(sel, 1);
	sunxi_lcd_delay_ms(5);
	sunxi_lcd_pin_cfg(sel, 1);

}

static void lcd_power_off(u32 sel)
{
	sunxi_lcd_pin_cfg(sel, 0);
	sunxi_lcd_delay_ms(20);
	panel_reset(sel, 0);
	sunxi_lcd_delay_ms(5);
}

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

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

#define REGFLAG_DELAY 0XFC
#define REGFLAG_END_OF_TABLE 0xFD /* END OF REGISTERS MARKER */

struct LCM_setting_table {
	u8 cmd;
	u32 count;
	u8 para_list[32];
};

static struct LCM_setting_table lcm_tft08006_setting[] = {
	{0xFF, 3, {0x98, 0x81, 0x03} },
	{0x01, 1, {0x00} },
	{0x02, 1, {0x00} },
	{0x03, 1, {0x53} },
	{0x04, 1, {0x53} },
	{0x05, 1, {0x13} },
	{0x06, 1, {0x04} },
	{0x07, 1, {0x02} },
	{0x08, 1, {0x02} },
	{0x09, 1, {0x00} },
	{0x0a, 1, {0x00} },
	{0x0b, 1, {0x00} },
	{0x0c, 1, {0x00} },
	{0x0d, 1, {0x00} },
	{0x0e, 1, {0x00} },
	{0x0f, 1, {0x00} },
	{0x10, 1, {0x00} },
	{0x11, 1, {0x00} },
	{0x12, 1, {0x00} },
	{0x13, 1, {0x00} },
	{0x14, 1, {0x00} },
	{0x15, 1, {0x00} },
	{0x16, 1, {0x00} },
	{0x17, 1, {0x00} },
	{0x18, 1, {0x00} },
	{0x19, 1, {0x00} },
	{0x1a, 1, {0x00} },
	{0x1b, 1, {0x00} },
	{0x1c, 1, {0x00} },
	{0x1d, 1, {0x00} },
	{0x1e, 1, {0xc0} },
	{0x1f, 1, {0x80} },
	{0x20, 1, {0x02} },
	{0x21, 1, {0x09} },
	{0x22, 1, {0x00} },
	{0x23, 1, {0x00} },
	{0x24, 1, {0x00} },
	{0x25, 1, {0x00} },
	{0x26, 1, {0x00} },
	{0x27, 1, {0x00} },
	{0x28, 1, {0x55} },
	{0x29, 1, {0x03} },
	{0x2a, 1, {0x00} },
	{0x2b, 1, {0x00} },
	{0x2c, 1, {0x00} },
	{0x2d, 1, {0x00} },
	{0x2e, 1, {0x00} },
	{0x2f, 1, {0x00} },
	{0x30, 1, {0x00} },
	{0x31, 1, {0x00} },
	{0x32, 1, {0x00} },
	{0x33, 1, {0x00} },
	{0x34, 1, {0x00} },
	{0x35, 1, {0x00} },
	{0x36, 1, {0x00} },
	{0x37, 1, {0x00} },
	{0x38, 1, {0x3C} },
	{0x39, 1, {0x00} },
	{0x3a, 1, {0x00} },
	{0x3b, 1, {0x00} },
	{0x3c, 1, {0x00} },
	{0x3d, 1, {0x00} },
	{0x3e, 1, {0x00} },
	{0x3f, 1, {0x00} },
	{0x40, 1, {0x00} },
	{0x41, 1, {0x00} },
	{0x42, 1, {0x00} },
	{0x43, 1, {0x00} },
	{0x44, 1, {0x00} },
	{0x50, 1, {0x01} },
	{0x51, 1, {0x23} },
	{0x52, 1, {0x45} },
	{0x53, 1, {0x67} },
	{0x54, 1, {0x89} },
	{0x55, 1, {0xab} },
	{0x56, 1, {0x01} },
	{0x57, 1, {0x23} },
	{0x58, 1, {0x45} },
	{0x59, 1, {0x67} },
	{0x5a, 1, {0x89} },
	{0x5b, 1, {0xab} },
	{0x5c, 1, {0xcd} },
	{0x5d, 1, {0xef} },
	{0x5e, 1, {0x01} },
	{0x5f, 1, {0x08} },
	{0x60, 1, {0x02} },
	{0x61, 1, {0x02} },
	{0x62, 1, {0x0A} },
	{0x63, 1, {0x15} },
	{0x64, 1, {0x14} },
	{0x65, 1, {0x02} },
	{0x66, 1, {0x11} },
	{0x67, 1, {0x10} },
	{0x68, 1, {0x02} },
	{0x69, 1, {0x0F} },
	{0x6a, 1, {0x0E} },
	{0x6b, 1, {0x02} },
	{0x6c, 1, {0x0D} },
	{0x6d, 1, {0x0C} },
	{0x6e, 1, {0x06} },
	{0x6f, 1, {0x02} },
	{0x70, 1, {0x02} },
	{0x71, 1, {0x02} },
	{0x72, 1, {0x02} },
	{0x73, 1, {0x02} },
	{0x74, 1, {0x02} },
	{0x75, 1, {0x06} },
	{0x76, 1, {0x02} },
	{0x77, 1, {0x02} },
	{0x78, 1, {0x0A} },
	{0x79, 1, {0x15} },
	{0x7a, 1, {0x14} },
	{0x7b, 1, {0x02} },
	{0x7c, 1, {0x10} },
	{0x7d, 1, {0x11} },
	{0x7e, 1, {0x02} },
	{0x7f, 1, {0x0C} },
	{0x80, 1, {0x0D} },
	{0x81, 1, {0x02} },
	{0x82, 1, {0x0E} },
	{0x83, 1, {0x0F} },
	{0x84, 1, {0x08} },
	{0x85, 1, {0x02} },
	{0x86, 1, {0x02} },
	{0x87, 1, {0x02} },
	{0x88, 1, {0x02} },
	{0x89, 1, {0x02} },
	{0x8A, 1, {0x02} },

	{0xFF, 3, {0x98, 0x81, 0x04} },
//	{0x2D, 1, {0xFF} },   //BIST
//	{0x2F, 1, {0x01} },   //BIST
	{0x6C, 1, {0x15} },
	{0x6E, 1, {0x30} },
	{0x6F, 1, {0x37} },   //3VSP    3VSN
	{0x8D, 1, {0x1F} },
	{0x87, 1, {0xBA} },
	{0x26, 1, {0x76} },
	{0xB2, 1, {0xD1} },
	{0xB5, 1, {0x07} },
	{0x35, 1, {0x17} },
	{0x33, 1, {0x14} },
	{0x31, 1, {0x75} },
	{0x3A, 1, {0x85} },
	{0x3B, 1, {0x98} },
	{0x38, 1, {0x01} },
	{0x39, 1, {0x00} },
	{0x7A, 1, {0x10} },

	{0xFF, 3, {0x98, 0x81, 0x01} },
	{0x22, 1, {0x0A} },
	{0x31, 1, {0x00} },
	{0x50, 1, {0xCF} },     //5.2V
	{0x51, 1, {0xCA} },     //-5.2V
	{0x53, 1, {0x45} },     //45   41
	{0x55, 1, {0x48} },
	{0x60, 1, {0x28} },
	{0x2E, 1, {0xC8} },
	{0x34, 1, {0x01} },

	//{0x56, 1, {0x00} },

	{0xA0, 1, {0x00} },		//VP255	Gamma P
	{0xA1, 1, {0x08} },               //VP251
	{0xA2, 1, {0x18} },               //VP247
	{0xA3, 1, {0x15} },              //VP243
	{0xA4, 1, {0x19} },               //VP239
	{0xA5, 1, {0x2D} },               //VP231
	{0xA6, 1, {0x21} },               //VP219
	{0xA7, 1, {0x23} },               //VP203
	{0xA8, 1, {0x74} },               //VP175
	{0xA9, 1, {0x1C} },               //VP144
	{0xAA, 1, {0x26} },               //VP111
	{0xAB, 1, {0x64} },               //VP80
	{0xAC, 1, {0x1A} },               //VP52
	{0xAD, 1, {0x1C} },               //VP36
	{0xAE, 1, {0x50} },               //VP24
	{0xAF, 1, {0x25} },               //VP16
	{0xB0, 1, {0x2A} },               //VP12
	{0xB1, 1, {0x4C} },              //VP8
	{0xB2, 1, {0x5D} },               //VP4
	{0xB3, 1, {0x23} },               //VP0

	{0xC0, 1, {0x00} },	//VN255 GAMMA N
	{0xC1, 1, {0x1B} },              //VN251
	{0xC2, 1, {0x27} },              //VN247
	{0xC3, 1, {0x13} },              //VN243
	{0xC4, 1, {0x16} },              //VN239
	{0xC5, 1, {0x28} },              //VN231
	{0xC6, 1, {0x1E} },              //VN219
	{0xC7, 1, {0x20} },              //VN203
	{0xC8, 1, {0x7D} },              //VN175
	{0xC9, 1, {0x19} },              //VN144
	{0xCA, 1, {0x27} },              //VN111
	{0xCB, 1, {0x65} },              //VN80
	{0xCC, 1, {0x1D} },              //VN52
	{0xCD, 1, {0x1D} },              //VN36
	{0xCE, 1, {0x52} },              //VN24
	{0xCF, 1, {0x26} },              //VN16
	{0xD0, 1, {0x2C} },              //VN12
	{0xD1, 1, {0x4E} },              //VN8
	{0xD2, 1, {0x59} },              //VN4
	{0xD3, 1, {0x23} },              //VN0

	//{0xFF, 3, {0x98, 0x81, 0x04} },
	//{0x2F, 1, {0x01} },

	{0xFF, 3, {0x98, 0x81, 0x00} },
	{0x35, 1, {0x00} },

	{0x11, 0, {}},
	{REGFLAG_DELAY, REGFLAG_DELAY, {120}},

	{0x29, 0, {}},
	{REGFLAG_DELAY, REGFLAG_DELAY, {20}},

	{REGFLAG_END_OF_TABLE, REGFLAG_END_OF_TABLE, {}}
};

static void lcd_panel_init(u32 sel)
{
	__u32 i;
	sunxi_lcd_dsi_clk_enable(sel);
	sunxi_lcd_delay_ms(20);
	for (i = 0;; i++) {
		if (lcm_tft08006_setting[i].count == REGFLAG_END_OF_TABLE)
			break;
		else if (lcm_tft08006_setting[i].count == REGFLAG_DELAY) {
			sunxi_lcd_delay_ms(lcm_tft08006_setting[i].para_list[0]);
		} else {
			dsi_gen_wr(sel, lcm_tft08006_setting[i].cmd,
				   lcm_tft08006_setting[i].para_list,
				   lcm_tft08006_setting[i].count);
		}
		/* break; */
	}
}

static void lcd_panel_exit(u32 sel)
{
	sunxi_lcd_dsi_dcs_write_0para(sel, 0x10);
	sunxi_lcd_delay_ms(80);
	sunxi_lcd_dsi_dcs_write_0para(sel, 0x28);
	sunxi_lcd_delay_ms(50);
}

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

struct __lcd_panel tft08006_panel = {
	/* panel driver name, must mach the name of
	 * lcd_drv_name in sys_config.fex
	 */
	.name = "tft08006",
	.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,
	},
};

aozima LV 7

把MIPI的时钟线用示波器测一下看看有没有输出

whycan晕哥 LV 9

我前面驱动mipi屏也出现这个问题，后来发现是排线拔插次数多废了，换一根新排线就好了。

dream LV 6

没遇到过，坐等结论。

mangogeek LV 8

gamma偏差太大，导致液晶“极化”

100ask LV 6

亮屏成功，这个时钟和时序真的是离谱，错一个都不行，试了两天，自己粗心误把HBP认为HeightBP，另外接下来我们将提供带电容触摸版本以及不带电容触摸版本，可直接连接到 MangoPI MQ-Pro AW-OL NeZha公板，T113等版本，为大家提供一个高性价比的双LANE 480x800的MIPI屏模块。

dream LV 6

@allwinnertech 666