RK3588-MIPI屏幕调试笔记:RK3588-MIPI-DSI之LCD上电初始化时序

一. 简介

mipi屏调试一般都要在RK平台的dts中配置屏幕上电初始化时序 ：panel-init-sequence和下电初始化时序：panel-exit-sequence。本文讲解如何配置屏幕的这些初始化时序。

二. 数据类型：Data Type

2.1 常见数据类型 1 ：DCS Write

注意：这里的parameter并不是指数据字节个数

0x05 命令类型: 单字节数据    (DCS Short Write, no parameters)
	
0x15 命令类型: 双字节数据    (DCS Short Write, 1 parameter)
	
0x39 命令类型: 多字节数据    (DCS Long Write, n parameters n > 2)

0x05 命令类型：(DCS Short Write, no parameters)

05 95 01 11
05 95 01 29

0x15 命令类型：(DCS Short Write, 1 parameter)

15 00 02 80 77
|  |  | |  |
|  |  | |  数据
|  |  | | 寄存器地址
|  |  数据长度
|  延时
命令类型（0x05: 单字节数据 0x15: 双字节数据 0x39: 多字节数据）
	
解析：
Data Type：0x15       ( 0x15格式的数据类型 DCS Short Write, 1 parameter)
Delay：0x00           ( 延时，表示当前 Packet 发送完成之后，需要延时多少 ms，再开始发送下一条命令 )
Payload Length：0x02  ( Packet 的有效负载长度为2 Bytes，数据字节个数为2 )
Payload: 0x80 0x77    ( Payload 数据 )

0x39 命令类型是带多个参数,大于两个参数 (DCS Long Write / write_LUT Command Packet)

39 00 06 FF 77 01 00 00 10
39 00 03 C0 63 00
39 00 03 C1 11 02	

2.2 常见数据类型 2 ：Generic Write

注意：这里的parameter并不是指数据字节个数

0x03 命令类型：  单字节数据 (Generic Short Write, no parameters)
	
0x13 命令类型：  双字节数据 (Generic Short Write, 1 parameter)
	
0x23 命令类型：  三字节数据 (Generic Short Write, 2 parameters)
	
0x29 命令类型：  多字节数据 (Generic Long Write, n parameters n > 2)

三. RK平台上电初始化时序配置

屏厂给的MIPI屏初始化代码：

params->dsi.vertical_sync_active=2
params->dsi.vertical_backporch=10
params->dsi.vertical_frontporch=14
params->dsi.horizontal_sync_active=24
params->dsi.horizontal_backporch=80
params->dsi.horizontal_frontporch=60
params->dsi.PLL_CLOCK=478
 
LCD_nReset=1;
Delayms(5);
LCD_nReset=0;
Delayms(20);//10
LCD_nReset=1;
Delayms(200);//120

Generic_Short_Write_1P(0xB0,0x01);	
Generic_Short_Write_1P(0xC0,0x26);	
Generic_Short_Write_1P(0xC1,0x10);	
Generic_Short_Write_1P(0xC2,0x0E);	
Generic_Short_Write_1P(0xC3,0x00);	
Generic_Short_Write_1P(0xC4,0x00);	
Generic_Short_Write_1P(0xC5,0x23);	
Generic_Short_Write_1P(0xC6,0x11);	
Generic_Short_Write_1P(0xC7,0x22);	
Generic_Short_Write_1P(0xC8,0x20);	
Generic_Short_Write_1P(0xC9,0x1E);	
Generic_Short_Write_1P(0xCA,0x1C);	
Generic_Short_Write_1P(0xCB,0x0C);	
Generic_Short_Write_1P(0xCC,0x0A);	
Generic_Short_Write_1P(0xCD,0x08);	
Generic_Short_Write_1P(0xCE,0x06);	
Generic_Short_Write_1P(0xCF,0x18);	
Generic_Short_Write_1P(0xD0,0x02);	
Generic_Short_Write_1P(0xD1,0x00);	
Generic_Short_Write_1P(0xD2,0x00);	
Generic_Short_Write_1P(0xD3,0x00);	
Generic_Short_Write_1P(0xD4,0x26);	
Generic_Short_Write_1P(0xD5,0x0F);	
Generic_Short_Write_1P(0xD6,0x0D);	
Generic_Short_Write_1P(0xD7,0x00);	
Generic_Short_Write_1P(0xD8,0x00);	
Generic_Short_Write_1P(0xD9,0x23);	
Generic_Short_Write_1P(0xDA,0x11);	
Generic_Short_Write_1P(0xDB,0x21);	
Generic_Short_Write_1P(0xDC,0x1F);	
Generic_Short_Write_1P(0xDD,0x1D);	
Generic_Short_Write_1P(0xDE,0x1B);	
Generic_Short_Write_1P(0xDF,0x0B);	
Generic_Short_Write_1P(0xE0,0x09);	
Generic_Short_Write_1P(0xE1,0x07);	
Generic_Short_Write_1P(0xE2,0x05);	
Generic_Short_Write_1P(0xE3,0x17);	
Generic_Short_Write_1P(0xE4,0x01);	
Generic_Short_Write_1P(0xE5,0x00);	
Generic_Short_Write_1P(0xE6,0x00);	
Generic_Short_Write_1P(0xE7,0x00);	
Generic_Short_Write_1P(0xB0,0x03);	
Generic_Short_Write_1P(0xBE,0x04);	
Generic_Short_Write_1P(0xB9,0x40);	
Generic_Short_Write_1P(0xCC,0x88);	
Generic_Short_Write_1P(0xC8,0x0C);	
Generic_Short_Write_1P(0xC9,0x07);	
Generic_Short_Write_1P(0xCD,0x01);	
Generic_Short_Write_1P(0xCA,0x40);	
Generic_Short_Write_1P(0xCE,0x1A);	
Generic_Short_Write_1P(0xCF,0x60);	
Generic_Short_Write_1P(0xD2,0x08);	
Generic_Short_Write_1P(0xD3,0x08);	
Generic_Short_Write_1P(0xDB,0x01);	
Generic_Short_Write_1P(0xD9,0x06);	
Generic_Short_Write_1P(0xD4,0x00);	
Generic_Short_Write_1P(0xD5,0x01);	
Generic_Short_Write_1P(0xD6,0x04);	
Generic_Short_Write_1P(0xD7,0x03);	
Generic_Short_Write_1P(0xC2,0x00);	
Generic_Short_Write_1P(0xC3,0x0E);	
Generic_Short_Write_1P(0xC4,0x00);	
Generic_Short_Write_1P(0xC5,0x0E);	
Generic_Short_Write_1P(0xDD,0x00);	
Generic_Short_Write_1P(0xDE,0x0E);	
Generic_Short_Write_1P(0xE6,0x00);	
Generic_Short_Write_1P(0xE7,0x0E);	
Generic_Short_Write_1P(0xC2,0x00);	
Generic_Short_Write_1P(0xC3,0x0E);	
Generic_Short_Write_1P(0xC4,0x00);	
Generic_Short_Write_1P(0xC5,0x0E);	
Generic_Short_Write_1P(0xDD,0x00);	
Generic_Short_Write_1P(0xDE,0x0E);	
Generic_Short_Write_1P(0xE6,0x00);	
Generic_Short_Write_1P(0xE7,0x0E);	
Generic_Short_Write_1P(0xB0,0x06);	
Generic_Short_Write_1P(0xC0,0xA5);	
Generic_Short_Write_1P(0xD5,0x1C);	
Generic_Short_Write_1P(0xC0,0x00);	
Generic_Short_Write_1P(0xB0,0x00);
Generic_Short_Write_1P(0xBD,0x30);//VCOM	  37
	
Generic_Short_Write_1P(0xF9,0x5C);	
Generic_Short_Write_1P(0xC2,0x14);	
Generic_Short_Write_1P(0xC4,0x14);	
Generic_Short_Write_1P(0xBF,0x15);	
Generic_Short_Write_1P(0xC0,0x0C);	


Generic_Short_Write_1P(0xB0,0x00);
Generic_Short_Write_1P(0xB1,0x79);
Generic_Short_Write_1P(0xBA,0x8F);//

     DCS_Short_Write_NP(0x11);	
     Delay(200);
     DCS_Short_Write_NP(0x29);
     Delay(50);

3.1 分析客户给的mipi屏初始化代码：

Generic_Short_Write_1P(0xBA,0x8F);

Generic_Short_Write_1P表示：发送Generic命令，带1个参数，数据字节个数为2(Generic Short Write, 1 parameter)
0xBA：寄存器地址
0x8F：数据1为0x8F

• 在DTS上转成RK上的mipi屏初始化格式

13 00 02 BA 8F

解析：
13 表示0x13数据类型的指令
00 表示没有延时
02 表示两个数据长度 ：0xBA,0x8F
BA 表示寄存器地址0xBA
8F 表示0x8F这个数据

• 分析客户给的mipi屏初始化代码：

 DCS_Short_Write_NP(0x11);	
 Delay(200);
 DCS_Short_Write_NP(0x29);
 Delay(50);
 
 解析：
 DCS_Short_Write_NP表示：只发送DCS命令，不带参数，数据字节个数为1。(DCS Short Write, no parameters)
 0x11：数据1为0x11
 Delay(200)：延迟为200

• 在DTS上转成RK上的mipi屏初始化格式

05 C8 01 11
05 32 01 29

解析：
05 表示0x05数据类型的指令
C8 表示延时为200 转换成16进制为0xC8
01 表示1个数据长度 ：0x11
11 表示数据：0x11

3.2 将屏厂的初始化代码转换成RK平台的屏幕上电初始化时序DTS配置：

panel-init-sequence = [
			13 00 02 B0 01
			13 00 02 C0 26
			13 00 02 C1 10
			13 00 02 C2 0E
			13 00 02 C3 00
			13 00 02 C4 00
			13 00 02 C5 23
			13 00 02 C6 11
			13 00 02 C7 22
			13 00 02 C8 20
			13 00 02 C9 1E
			13 00 02 CA 1C
			13 00 02 CB 0C
			13 00 02 CC 0A
			13 00 02 CD 08
			13 00 02 CE 06
			13 00 02 CF 18
			13 00 02 D0 02
			13 00 02 D1 00
			13 00 02 D2 00
			13 00 02 D3 00
			13 00 02 D4 26
			13 00 02 D5 0F
			13 00 02 D6 0D
			13 00 02 D7 00
			13 00 02 D8 00
			13 00 02 D9 23
			13 00 02 DA 11
			13 00 02 DB 21
			13 00 02 DC 1F
			13 00 02 DD 1D
			13 00 02 DE 1B
			13 00 02 DF 0B
			13 00 02 E0 09
			13 00 02 E1 07
			13 00 02 E2 05
			13 00 02 E3 17
			13 00 02 E4 01
			13 00 02 E5 00
			13 00 02 E6 00
			13 00 02 E7 00
			13 00 02 B0 03
			13 00 02 BE 04
			13 00 02 B9 40
			13 00 02 CC 88
			13 00 02 C8 0C
			13 00 02 C9 07
			13 00 02 CD 01
			13 00 02 CA 40
			13 00 02 CE 1A
			13 00 02 CF 60
			13 00 02 D2 08
			13 00 02 D3 08
			13 00 02 DB 01
			13 00 02 D9 06
			13 00 02 D4 00
			13 00 02 D5 01
			13 00 02 D6 04
			13 00 02 D7 03
			13 00 02 C2 00
			13 00 02 C3 0E
			13 00 02 C4 00
			13 00 02 C5 0E
			13 00 02 DD 00
			13 00 02 DE 0E
			13 00 02 E6 00
			13 00 02 E7 0E
			13 00 02 C2 00
			13 00 02 C3 0E
			13 00 02 C4 00
			13 00 02 C5 0E
			13 00 02 DD 00
			13 00 02 DE 0E
			13 00 02 E6 00
			13 00 02 E7 0E
			13 00 02 B0 06
			13 00 02 C0 A5
			13 00 02 D5 1C
			13 00 02 C0 00
			13 00 02 B0 00
			13 00 02 BD 30

			13 00 02 F9 5C
			13 00 02 C2 14
			13 00 02 C4 14
			13 00 02 BF 15
			13 00 02 C0 0C


			13 00 02 B0 00
			13 00 02 B1 79
			13 00 02 BA 8F

			05 C8 01 11
			05 32 01 29
		];

		panel-exit-sequence = [
			05 00 01 28
			05 00 01 10
		];