将全志R16平台上的MIPI屏迁移到全志R40平台上（草稿）

将全志R16平台上的MIPI屏迁移到全志R40平台上
2017/11/3 20:29
版本：V1.0




0、
在全志R16平台，MIPI屏幕同事在DragonBorad（DragonMate）/Android4.4.2（Parrot V1.1）下已经点亮！
uboot中就算你不配置MIPI屏幕，在lichee中编译就可以让MIPI屏幕显示了。








1、
在全志R40的android6.0/tinav2.1的SDK中默认配置
W:\lcd_r40_tianv2.1\target\allwinner\azalea-m2ultra\configs\sys_config.fex
[lcd0]
lcd_used            = 1


lcd_driver_name     = "S070WV20_MIPI_RGB"








W:\r40-android-6.0\lichee\tools\pack\chips\sun8iw11p1\configs\m2ultra\sys_config.fex
[lcd0]
lcd_used            = 1


lcd_driver_name     = "S070WV20_MIPI_RGB"




也就是LCD屏的名称就是S070WV20_MIPI_RGB，很容易找到驱动程序为：


rootroot@cm-System-Product-Name:~$ cd /home/wwt/lcd_r40_tianv2.1/
rootroot@cm-System-Product-Name:/home/wwt/lcd_r40_tianv2.1$ ll
总用量 96
drwxrwxr-x  5 rootroot rootroot  4096 10月 31 22:07 build
drwxrwxr-x  3 rootroot rootroot  4096  1月 12  2017 config
-r--r--r--  1 rootroot rootroot   609  1月 12  2017 Config.in
drwxrwxr-x  3 rootroot rootroot 24576  1月 12  2017 dl
drwxrwxr-x  3 rootroot rootroot  4096  1月 12  2017 docs
drwxrwxr-x  4 rootroot rootroot  4096  1月 12  2017 lichee
-r--r--r--  1 rootroot rootroot    82  1月 12  2017 Makefile
drwxrwxr-x  4 rootroot rootroot  4096 10月 31 21:47 out
drwxrwxr-x 19 rootroot rootroot  4096  1月 12  2017 package
drwxrwxr-x  4 rootroot rootroot  4096  1月 12  2017 prebuilt
-r--r--r--  1 rootroot rootroot 13360  1月 12  2017 rules.mk
drwxrwxr-x  6 rootroot rootroot  4096  1月 12  2017 scripts
drwxrwxr-x  7 rootroot rootroot  4096  1月 12  2017 target
drwxrwxr-x  3 rootroot rootroot  4096 11月  1 17:08 tmp
drwxrwxr-x 12 rootroot rootroot  4096  1月 12  2017 toolchain
drwxrwxr-x 60 rootroot rootroot  4096  1月 12  2017 tools
rootroot@cm-System-Product-Name:/home/wwt/lcd_r40_tianv2.1$ cd lichee/linux-3.10/drivers/video/sunxi/disp2/disp/
rootroot@cm-System-Product-Name:/home/wwt/lcd_r40_tianv2.1/lichee/linux-3.10/drivers/video/sunxi/disp2/disp$ ll
总用量 13240
-rw-r--r-- 1 rootroot rootroot       8 10月 31 21:57 built-in.o
drwxrwxr-x 6 rootroot rootroot    4096 10月 31 21:52 de
-rw-rw-r-- 1 rootroot rootroot   20535  1月 12  2017 dev_composer.c
-rw-r--r-- 1 rootroot rootroot  132656 10月 31 21:52 dev_composer.o
-rw-rw-r-- 1 rootroot rootroot   65586  1月 12  2017 dev_disp.c
-rwxrwxr-x 1 rootroot rootroot   19901  1月 12  2017 dev_disp_debugfs.c
-rwxrwxr-x 1 rootroot rootroot     615  1月 12  2017 dev_disp_debugfs.h
-rw-r--r-- 1 rootroot rootroot  127012 10月 31 21:52 dev_disp_debugfs.o
-rw-rw-r-- 1 rootroot rootroot    6623  1月 12  2017 dev_disp.h
-rw-r--r-- 1 rootroot rootroot  215060 10月 31 21:52 dev_disp.o
-rw-rw-r-- 1 rootroot rootroot   48495  1月 12  2017 dev_fb.c
-rw-r--r-- 1 rootroot rootroot  165440 10月 31 21:52 dev_fb.o
-rw-r--r-- 1 rootroot rootroot 6275992 10月 31 21:52 disp.ko
-rw-r--r-- 1 rootroot rootroot     471 10月 31 21:52 disp.mod.c
-rw-r--r-- 1 rootroot rootroot   17488 10月 31 21:52 disp.mod.o
-rw-r--r-- 1 rootroot rootroot 6262228 10月 31 21:52 disp.o
-rw-rw-r-- 1 rootroot rootroot   17295  1月 12  2017 disp_sys_intf.c
-rw-rw-r-- 1 rootroot rootroot    2998  1月 12  2017 disp_sys_intf.h
-rw-r--r-- 1 rootroot rootroot  116596 10月 31 21:52 disp_sys_intf.o
drwxrwxr-x 2 rootroot rootroot    4096 10月 31 21:52 lcd
-rwxrwxr-x 1 rootroot rootroot     802  1月 12  2017 Makefile
-rw-r--r-- 1 rootroot rootroot      46 11月  1 17:08 modules.order
rootroot@cm-System-Product-Name:/home/wwt/lcd_r40_tianv2.1/lichee/linux-3.10/drivers/video/sunxi/disp2/disp$ 
rootroot@cm-System-Product-Name:/home/wwt/lcd_r40_tianv2.1/lichee/linux-3.10/drivers/video/sunxi/disp2/disp$ 
rootroot@cm-System-Product-Name:/home/wwt/lcd_r40_tianv2.1/lichee/linux-3.10/drivers/video/sunxi/disp2/disp$ grep S070WV20_MIPI_RGB . -R
./.disp.o.cmd:cmd_drivers/video/sunxi/disp2/disp/disp.o := arm-openwrt-linux-muslgnueabi-ld -EL    -r -o drivers/video/sunxi/disp2/disp/disp.o drivers/video/sunxi/disp2/disp/dev_disp.o drivers/video/sunxi/disp2/disp/dev_fb.o drivers/video/sunxi/disp2/disp/dev_disp_debugfs.o drivers/video/sunxi/disp2/disp/disp_sys_intf.o drivers/video/sunxi/disp2/disp/dev_composer.o drivers/video/sunxi/disp2/disp/de/disp_display.o drivers/video/sunxi/disp2/disp/de/disp_features.o drivers/video/sunxi/disp2/disp/de/disp_device.o drivers/video/sunxi/disp2/disp/de/disp_lcd.o drivers/video/sunxi/disp2/disp/de/disp_manager.o drivers/video/sunxi/disp2/disp/de/disp_private.o drivers/video/sunxi/disp2/disp/de/disp_smart_backlight.o drivers/video/sunxi/disp2/disp/de/disp_enhance.o drivers/video/sunxi/disp2/disp/de/disp_capture.o drivers/video/sunxi/disp2/disp/de/disp_hdmi.o drivers/video/sunxi/disp2/disp/de/disp_tv.o drivers/video/sunxi/disp2/disp/de/disp_vdevice.o drivers/video/sunxi/disp2/disp/de/disp_eink_manager.o drivers/video/sunxi/disp2/disp/de/eink_buffer_manager.o drivers/video/sunxi/disp2/disp/de/eink_pipeline_manager.o drivers/video/sunxi/disp2/disp/de/disp_format_convert.o drivers/video/sunxi/disp2/disp/de/disp_vga.o drivers/video/sunxi/disp2/disp/lcd/panels.o drivers/video/sunxi/disp2/disp/lcd/lcd_source.o drivers/video/sunxi/disp2/disp/lcd/default_panel.o drivers/video/sunxi/disp2/disp/lcd/lt070me05000.o drivers/video/sunxi/disp2/disp/lcd/wtq05027d01.o drivers/video/sunxi/disp2/disp/lcd/t27p06.o drivers/video/sunxi/disp2/disp/lcd/dx0960be40a1.o drivers/video/sunxi/disp2/disp/lcd/tft720x1280.o drivers/video/sunxi/disp2/disp/lcd/S6D7AA0X01.o drivers/video/sunxi/disp2/disp/lcd/default_eink.o drivers/video/sunxi/disp2/disp/lcd/cpu_gg1p4062utsw.o drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_fcc.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_gsu.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_hal.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/disp_al.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_peak.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_rtmx.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_scaler_table.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_vep_table.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_vsu.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_feat.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_lcd.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_lti.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_fce.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_ase.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_bws.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_enhance.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_smbl.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_ccsc.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_dcsc.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_wb.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_clock.o drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_dsi.o 
匹配到二进制文件 ./disp.o
./lcd/S070WV20_MIPI_RGB.h:#ifndef  __S070WV20_MIPI_RGB_PANEL_H__
./lcd/S070WV20_MIPI_RGB.h:#define  __S070WV20_MIPI_RGB_PANEL_H__
./lcd/S070WV20_MIPI_RGB.h:extern __lcd_panel_t S070WV20_MIPI_RGB_panel;
./lcd/S070WV20_MIPI_RGB.c:#include "S070WV20_MIPI_RGB.h"
./lcd/S070WV20_MIPI_RGB.c:__lcd_panel_t S070WV20_MIPI_RGB_panel = {
./lcd/S070WV20_MIPI_RGB.c: .name = "S070WV20_MIPI_RGB",




很容易确认默认的MIPI屏的驱动就是：S070WV20_MIPI_RGB.c
W:\lcd_r40_tianv2.1\lichee\linux-3.10\drivers\video\sunxi\disp2\disp\lcd\S070WV20_MIPI_RGB.c




为了防止平台的不同所导致的移植的问题（全志的每一个平台的驱动都是有点细微的差别，貌似就是要给你找难受的！）
我还是决定拿S070WV20_MIPI_RGB.c开刀，替换其中的配置参数！








3、分析源码：头文件分析
MIPI屏幕的额控制引脚确认让我看了好久好久！
W:\lcd_r40_tianv2.1\lichee\linux-3.10\drivers\video\sunxi\disp2\disp\lcd\S070WV20_MIPI_RGB.h
/*
 *
 * Copyright (c) 2016 Allwinnertech Co., Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */
#ifndef  __S070WV20_MIPI_RGB_PANEL_H__
#define  __S070WV20_MIPI_RGB_PANEL_H__


#include "panels.h"


#define icn_en(val) sunxi_lcd_gpio_set_value(sel, 0, val)
#define power_en(val)  sunxi_lcd_gpio_set_value(sel, 1, val)


extern __lcd_panel_t S070WV20_MIPI_RGB_panel;


#endif




忽然之间发现：sys_config.fex中有配置GPIO0和GPIO1的，但是没有注释它们是做啥用的！


W:\lcd_r40_tianv2.1\target\allwinner\azalea-m2ultra\configs\sys_config.fex
;BPI-M2U
;lcd_bl_en           = port:PH16<1><0><2><1>
;CB-S
lcd_bl_en           = port:PB10<1><0><2><1>
lcd_power           = "vcc-3v"
;lcd_power           = "vcc-mipi"


;BPI-M2U
;LCD-RST
;lcd_gpio_0    = port:PH17<1><0><2><1>
;LCD-PWR-EN
;lcd_gpio_1    = port:PH18<1><0><2><1>


;CB-S
;LCD-RST
lcd_gpio_0    = port:PB09<1><0><2><1>
;LCD-PWR-EN
lcd_gpio_1    = port:PB11<1><0><2><1>
;lcd_io_regluator1   = "vcc-pd"




对照BPI M2U的原始图，根据引脚定义，很容易发现GPIO0是RESET复位引脚，GPIO1是电源使能引脚。不过我们我们的全志R40开发板设计的时候LCD始终供电，那就是不用考虑供电的配置了。简化了一点！
根据全志R16的经验，只要要RESET引脚拉高（置1）就可以显示了！


/*
 *
 * Copyright (c) 2016 Allwinnertech Co., Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */
#ifndef  __S070WV20_MIPI_RGB_PANEL_H__
#define  __S070WV20_MIPI_RGB_PANEL_H__


#include "panels.h"


//;CB-S
//;LCD-RST
//lcd_gpio_0    = port:PB09<1><0><2><1>
//;LCD-PWR-EN
//lcd_gpio_1    = port:PB11<1><0><2><1>
//;lcd_io_regluator1   = "vcc-pd"


//SET GPIO0
#define icn_en(val) sunxi_lcd_gpio_set_value(sel, 0, val)
//SET GPIO1
#define power_en(val)  sunxi_lcd_gpio_set_value(sel, 1, val)


//R16
//#define panel_rst(v)    (sunxi_lcd_gpio_set_value(0, 0, v))


extern __lcd_panel_t S070WV20_MIPI_RGB_panel;


#endif








4、更新sys_config.fex
比对全志R16的可以使用的参数。对于全志R40没有但是全志R16有的，拷贝并标记。
对于全志R40有但是全志R16不涉及的配置暂时也不动（动了怕出错！）








5、
更新驱动部分（参照全志R16平台已经调通的驱动程序，具体不详细叙述了）
W:\lcd_r40_tianv2.1\lichee\linux-3.10\drivers\video\sunxi\disp2\disp\lcd\S070WV20_MIPI_RGB.c
#define REGFLAG_END_OF_TABLE 0x102
#define REGFLAG_DELAY 0x101


struct lcd_setting_table {
u16 cmd;
u32 count;
u8 para_list[64];
};


static struct lcd_setting_table hx050bh12a04_init_setting[] = {
//JD9365 initial code
//Page0
{0xE0,01,{0x00}},

//--- PASSWORD  ----//
{0xE1,01,{0x93}},
{0xE2,01,{0x65}},
{0xE3,01,{0xF8}},
{0x80,01,{0x03}},

//Page0
{0xE0,01,{0x04}},
{0x2D,01,{0x03}},

//--- Sequence Ctrl  ----//
//{0x70,01,{0x10}},//DC0,01,{DC1 10 20
//{0x71,01,{0x13}},//DC2,01,{DC3  13 13
//{0x72,01,{0x06}},//DC7  06 06
//{0x75,01,{0x03}},// 03 04

//--- Page1  ----//
{0xE0,01,{0x01}},
//{0x4A,01,{0x30}},

//Set VCOM
{0x00,01,{0x00}},
{0x01,01,{0x8E}},//A0
{0x03,01,{0x00}},
{0x04,01,{0x8E}},//A0

//Set Gamma Power,01,{ VGMP,01,{VGMN,01,{VGSP,01,{VGSN
//{0x0A,01,{0x07}},
//{0x0C,01,{0x74}},

//Set Gamma Power,01,{ VGMP,01,{VGMN,01,{VGSP,01,{VGSN
{0x17,01,{0x00}},
{0x18,01,{0xD8}},//D7
{0x19,01,{0x01}},//00
{0x1A,01,{0x00}},
{0x1B,01,{0xD8}},
{0x1C,01,{0x01}},//00

//Set Gate Power
{0x1F,01,{0x74}},//VGH_REG=17V 6A VGH_REG=15V
{0x20,01,{0x19}},//VGL_REG=-8V 23 VGL_REG=-10V
{0x21,01,{0x19}},//VGL_REG2=-8V 23 VGL_REG2=-10V
{0x22,01,{0x0E}},


//SET RGBCYC
{0x37,01,{0x29}},//SS=1,01,{ BGR=1
{0x38,01,{0x05}},//JDT=101 Zig-zag
{0x39,01,{0x08}},//RGB_N_EQ1,01,{ modify 20140806
{0x3A,01,{0x18}},//12 modify 15/05/06RGB_N_EQ2,01,{ modify 20140806
{0x3B,01,{0x18}},//modify 15/05/06
{0x3C,01,{0x72}},//78 modify 15/05/06SET EQ3 for TE_H
{0x3D,01,{0xFF}},//SET CHGEN_ON,01,{ modify 20140827 
{0x3E,01,{0xFF}},//SET CHGEN_OFF,01,{ modify 20140827 
{0x3F,01,{0xFF}},//SET CHGEN_OFF2,01,{ modify 20140827


//Set TCON
{0x40,01,{0x06}},//RSO 04h=720,01,{ 05h=768,01,{ 06h=800
{0x41,01,{0xA0}},//LN=640->1280 line

{0x43,01,{0x10}},//VFP
{0x44,01,{0x0E}},//VBP
{0x45,01,{0x3C}},//HBP

//--- power voltage  ----//
{0x55,01,{0x0F}},//DCDCM=0011,01,{ HX PWR_IC
{0x56,01,{0x01}},
{0x57,01,{0x64}},//65 modify 15/05/06
{0x58,01,{0x0A}},//AVDD
{0x59,01,{0x0A}},//VCL &AVEE
{0x5A,01,{0x28}},//VGH ,01,{15V
{0x5B,01,{0x10}},//VGL,01,{-10V 

//--- Gamma  ----//
{0x5D,01,{0x7C}},//70
{0x5E,01,{0x60}},  //56
{0x5F,01,{0x4E}},//45
{0x60,01,{0x40}},//39
{0x61,01,{0x39}},  //35
{0x62,01,{0x28}},  //26
{0x63,01,{0x2A}},  //2A
{0x64,01,{0x11}},  //14
{0x65,01,{0x27}},  //2E
{0x66,01,{0x23}},  //2D
{0x67,01,{0x21}},  //2D
{0x68,01,{0x3D}},  //4C
{0x69,01,{0x2B}},  //3A
{0x6A,01,{0x33}},  //45
{0x6B,01,{0x26}},  //38
{0x6C,01,{0x24}},  //36
{0x6D,01,{0x18}},  //2B
{0x6E,01,{0x0A}},  //1C
{0x6F,01,{0x00}},  //00

{0x70,01,{0x7C}},  //70
{0x71,01,{0x60}},  //56
{0x72,01,{0x4E}},  //45
{0x73,01,{0x40}},  //39
{0x74,01,{0x39}},  //35
{0x75,01,{0x29}},  //26
{0x76,01,{0x2B}},  //2A
{0x77,01,{0x12}},  //14
{0x78,01,{0x27}},  //2E
{0x79,01,{0x24}},  //2D
{0x7A,01,{0x21}},  //2D
{0x7B,01,{0x3E}},  //4C
{0x7C,01,{0x2B}},  //3A
{0x7D,01,{0x33}},  //45
{0x7E,01,{0x26}},  //38
{0x7F,01,{0x24}},  //36
{0x80,01,{0x19}},  //2B
{0x81,01,{0x0A}},  //1C
{0x82,01,{0x00}},  //00

//Page2,01,{ for GIP 
{0xE0,01,{0x02}},
 
//GIP_L Pin mapping  
{0x00,01,{0x0E}},//L1/CK2BO/CKV10
{0x01,01,{0x06}},  //L2/CK2O/CKV2 
{0x02,01,{0x0C}},  //L3/CK1BO/CKV8 
{0x03,01,{0x04}},  //L4/CK1O/CKV0 
{0x04,01,{0x08}},  //L5/CK3O/CKV4 
{0x05,01,{0x19}},  //L6/CK3BO/CKV2 
{0x06,01,{0x0A}},  //L7/CK4O/CKV6  
{0x07,01,{0x1B}},  //L8/CK4BO/CKV14
{0x08,01,{0x00}},  //L9/STVO/STV0
{0x09,01,{0x1D}},  //L10 
{0x0A,01,{0x1F}},  //L11/VGL 
{0x0B,01,{0x1F}},  //L12/VGL 
{0x0C,01,{0x1D}},  //L13 
{0x0D,01,{0x1D}},  //L14 
{0x0E,01,{0x1D}},  //L15 
{0x0F,01,{0x17}},  //L16/V1_O/FLM1
{0x10,01,{0x37}},  //L17/V2_O/FLM1_INV
{0x11,01,{0x1D}},  //L18 
{0x12,01,{0x1F}},  //L19/BW/VGL 
{0x13,01,{0x1E}},  //L20/FW/VGH 
{0x14,01,{0x10}},  //L21/RST_O/ETV0
{0x15,01,{0x1D}},  //L22 

//GIP_R Pin mapping
{0x16,01,{0x0F}},  //R1/CK2BE/CKV11
{0x17,01,{0x07}},  //R2/CK2E/CKV3 
{0x18,01,{0x0D}},  //R3/CK1BE/CKV9 
{0x19,01,{0x05}},  //R4/CK1E/CKV1 
{0x1A,01,{0x09}},  //R5/CK3E/CKV5 
{0x1B,01,{0x1A}},  //R6/CK3BE/CKV13
{0x1C,01,{0x0B}},  //R7/CK4E/CKV7  
{0x1D,01,{0x1C}},  //R8/CK4BE/CKV15
{0x1E,01,{0x01}},  //R9/STVE/STV1  
{0x1F,01,{0x1D}},  //R10 
{0x20,01,{0x1F}},  //R11/VGL 
{0x21,01,{0x1F}},  //R12/VGL 
{0x22,01,{0x1D}},  //R13 
{0x23,01,{0x1D}},  //R14 
{0x24,01,{0x1D}},  //R15 
{0x25,01,{0x18}},  //R16/V1_E/FLM2 
{0x26,01,{0x38}},  //R17/V2_E/FLM2_INV
{0x27,01,{0x1D}},  //R18 
{0x28,01,{0x1F}},  //R19/BW/VGL 
{0x29,01,{0x1E}},  //R20/FW/VGH 
{0x2A,01,{0x11}},  //R21/RST_E/ETV1
{0x2B,01,{0x1D}},  //R22 

//GIP_L_GS Pin mapping
{0x2C,01,{0x09}},  //L1/CK2BO/CKV5
{0x2D,01,{0x1A}},  //L2/CK2O/CKV13  
{0x2E,01,{0x0B}},  //L3/CK1BO/CKV7 
{0x2F,01,{0x1C}},  //L4/CK1O/CKV15
{0x30,01,{0x0F}},  //L5/CK3O/CKV11
{0x31,01,{0x07}},  //L6/CK3BO/CKV3
{0x32,01,{0x0D}},  //L7/CK4O/CKV9
{0x33,01,{0x05}},  //L8/CK4BO/CKV1
{0x34,01,{0x11}},  //L9/STVO/ETV1
{0x35,01,{0x1D}},  //L10 
{0x36,01,{0x1F}},  //L11/VGL 
{0x37,01,{0x1F}},  //L12/VGL 
{0x38,01,{0x1D}},  //L13 
{0x39,01,{0x1D}},  //L14 
{0x3A,01,{0x1D}},  //L15 
{0x3B,01,{0x18}},  //L16/V1_O/FLM2
{0x3C,01,{0x38}},  //L17/V2_O/?
{0x3D,01,{0x1D}},  //L18 
{0x3E,01,{0x1E}},  //L19/BW/VGH 
{0x3F,01,{0x1F}},  //L20/FW/VGL 
{0x40,01,{0x01}},  //L21/RST_O/STV1
{0x41,01,{0x1D}},  //L22 

//GIP_R_GS Pin mapping
{0x42,01,{0x08}},  //R1/CK2BE/CKV4
{0x43,01,{0x19}},  //R2/CK2E/CKV12  
{0x44,01,{0x0A}},  //R3/CK1BE/CKV6 
{0x45,01,{0x1B}},  //R4/CK1E/CKV14 
{0x46,01,{0x0E}},  //R5/CK3E/CKV10 
{0x47,01,{0x06}},  //R6/CK3BE/CKV2
{0x48,01,{0x0C}},  //R7/CK4E/CKV8  
{0x49,01,{0x04}},  //R8/CK4BE/CKV0
{0x4A,01,{0x10}},  //R9/STVE/ETV0
{0x4B,01,{0x1D}},  //R10 
{0x4C,01,{0x1F}},  //R11/VGL 
{0x4D,01,{0x1F}},  //R12/VGL 
{0x4E,01,{0x1D}},  //R13 
{0x4F,01,{0x1D}},  //R14 
{0x50,01,{0x1D}},  //R15 
{0x51,01,{0x17}},  //R16/V1_E/FLM1 
{0x52,01,{0x37}},  //R17/V2_E/?
{0x53,01,{0x1D}},  //R18 
{0x54,01,{0x1E}},  //R19/BW/VGH 
{0x55,01,{0x1F}},  //R20/FW/VGL
{0x56,01,{0x00}},  //R21/RST_E/STV0
{0x57,01,{0x1D}},  //R22 

//GIP Timing  
{0x58,01,{0x10}}, 
{0x59,01,{0x00}}, 
{0x5A,01,{0x00}}, 
{0x5B,01,{0x10}}, 
{0x5C,01,{0x00}},  //01
{0x5D,01,{0xD0}},  //50 
{0x5E,01,{0x01}},
{0x5F,01,{0x02}},
{0x60,01,{0x60}},
{0x61,01,{0x01}},
{0x62,01,{0x02}},
{0x63,01,{0x06}},
{0x64,01,{0x6A}},
{0x65,01,{0x55}}, 
{0x66,01,{0x0F}}, //2C
{0x67,01,{0xF7}},  //73
{0x68,01,{0x08}},  //05
{0x69,01,{0x08}},  
{0x6A,01,{0x6A}},  //66_by Max_20151029
{0x6B,01,{0x10}},//dummy clk
{0x6C,01,{0x00}}, 
{0x6D,01,{0x00}}, 
{0x6E,01,{0x00}}, 
{0x6F,01,{0x88}}, 
{0x70,01,{0x00}},  //00
{0x71,01,{0x17}},  //00
{0x72,01,{0x06}}, 
{0x73,01,{0x7B}}, 
{0x74,01,{0x00}}, 
{0x75,01,{0x80}},  //80
{0x76,01,{0x01}},  
{0x77,01,{0x5D}},  //0D
{0x78,01,{0x18}},  //18
{0x79,01,{0x00}}, 
{0x7A,01,{0x00}}, 
{0x7B,01,{0x00}}, 
{0x7C,01,{0x00}}, 
{0x7D,01,{0x03}}, 
{0x7E,01,{0x7B}}, 

//Page4
{0xE0,01,{0x04}},
//{0x04,01,{0x01}},//00 modify 15/05/06
{0x09,01,{0x10}},// modify 15/05/06
{0x0E,01,{0x38}},// modify 15/05/06

//ESD Check & lane number
{0x2B,01,{0x2B}},
{0x2D,01,{0x03}},
{0x2E,01,{0x44}},

//Page0
{0xE0,01,{0x00}},

//Watch dog
{0xE6,01,{0x02}},
{0xE7,01,{0x06}},

{0x11,01,{0x00}},


{REGFLAG_DELAY, 20, {}}, 

{0x29,01,{0x00}},

{REGFLAG_DELAY, 200, {}}, 

{REGFLAG_END_OF_TABLE, 0x00, {}},
};


static void LCD_panel_init(u32 sel)
{
/*


dprintk("***LCD_panel_init_kernel:Begin!!!\n");
sunxi_lcd_dsi_gen_write_1para(sel,0x7A,0xC1);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x20,0x20);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x21,0xE0);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x22,0x13);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x23,0x28);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x24,0x30);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x25,0x28);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x26,0x00);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x27,0x0D);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x28,0x03);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x29,0x1D);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x34,0x80);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x36,0x28);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0xB5,0xA0);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x5C,0xFF);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x2A,0x01);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x56,0x92);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x6B,0x71);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x69,0x2B);//2B
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x10,0x40);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x11,0x98);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0xB6,0x20);
sunxi_lcd_delay_ms(10);
sunxi_lcd_dsi_gen_write_1para(sel,0x51,0x20);
sunxi_lcd_delay_ms(10);
#if Bist_mode
sunxi_lcd_dsi_gen_write_1para(sel,0x14,0x43);
sunxi_lcd_dsi_gen_write_1para(sel,0x2A,0x49);
#endif
sunxi_lcd_dsi_gen_write_1para(sel,0x09,0x10);
sunxi_lcd_delay_ms(10);
*/



u32 i;
printk(KERN_ERR "**** wyb %s-%d-%s \n", __FILE__, __LINE__, __func__);
printk("raoyiming +++ LCD_panel_init\n");

/*R16*/
//panel_rst(1);
//sunxi_lcd_delay_ms(10);
//panel_rst(0);
//sunxi_lcd_delay_ms(50);
//panel_rst(1);
//sunxi_lcd_delay_ms(200);

/*R40*/
icn_en(1);
sunxi_lcd_delay_ms(10);
icn_en(0);
sunxi_lcd_delay_ms(50);
icn_en(1);
sunxi_lcd_delay_ms(200);


for (i = 0; ; i++) {
if(hx050bh12a04_init_setting[i].cmd == REGFLAG_END_OF_TABLE) {
break;
} else if (hx050bh12a04_init_setting[i].cmd == REGFLAG_DELAY) {
sunxi_lcd_delay_ms(hx050bh12a04_init_setting[i].count);
} else {
dsi_dcs_wr(sel, (u8)hx050bh12a04_init_setting[i].cmd, hx050bh12a04_init_setting[i].para_list, hx050bh12a04_init_setting[i].count);
}
}

sunxi_lcd_dsi_clk_enable(sel);


dprintk("***LCD_panel_init_kernel:End!!!\n");
printk(KERN_ERR "**** wyb %s-%d-%s \n", __FILE__, __LINE__, __func__);

return;
}


dsi_dcs_wr(sel, (u8)hx050bh12a04_init_setting[i].cmd, hx050bh12a04_init_setting[i].para_list, hx050bh12a04_init_setting[i].count);


dsi_dcs_wr函数可以用熟悉的I2C（读）写类比。
sel就是设备ID。（哪一条I2C总线，哪一个从机地址！）
(u8)hx050bh12a04_init_setting[i].cmd就是寄存器号码！
hx050bh12a04_init_setting[i].para_list就是寄存器值。
hx050bh12a04_init_setting[i].count计算器。定义它是因为有些I2C设备支持以块为单位的连续（读）写！^_（融会贯通了）








6、奇葩的事情：
驱动程序貌似没有反应！
就算你给驱动程序的每一个函数都加了打印，貌似驱动程序就根本没有进去过！蒙圈了。
因为全志R16平台的tinav2.1系统/android4.4.2系统都是在内核里面加载好MIPI屏幕的驱动就可以工作了，当时对于uboot也没有多想！（这里就是问题的关键所在了！）
不过reboot的时候，S070WV20_MIPI_RGB.c这个屏的退出会退出一下！使用BPI M2U调试的开发板的时候也是这样的！


加班到晚上22点，忽然想起来，还有uboot呢！司马当活马医了！把uboot配置一下试试！
当把BPI-M2U的uboot的驱动每一个函数都加打印之后，马上启动的时候一长串打印就出来！
U-Boot 2014.07 (Nov 02 2017 - 22:05:34) Allwinner Technology 


uboot commit : 66f890531bb93547478b60b27f30e9cad626dc63
 
i2c_init: by cpux
i2c_init ok
[      0.568]pmbus:   ready
[      0.589]PMU: AXP221
[      0.589]PMU: AXP22x found
[      0.590]PMU: dcdc2 1160
[      0.592]PMU: cpux 1008 Mhz,AXI=336 Mhz
PLL6=600 Mhz,AHB1=200 Mhz, APB1=100Mhz  MBus=400Mhz
set power on vol to default
dcdc1_vol = 3300, onoff=1
dcdc2_vol = 1160, onoff=1
dcdc3_vol = 1100, onoff=1
dcdc4_vol = 1100, onoff=0
aldo1_vol = 2800, onoff=0
aldo2_vol = 2500, onoff=0
aldo3_vol = 3000, onoff=1
dc1sw_vol = 3300, onoff=0
dc5ldo_vol = 1100, onoff=0
dldo1_vol = 3300, onoff=0
dldo2_vol = 3300, onoff=0
dldo3_vol = 3300, onoff=0
dldo4_vol = 2500, onoff=0
eldo1_vol = 2800, onoff=0
eldo2_vol = 1500, onoff=0
eldo3_vol = 1200, onoff=0
gpio0_vol = 3300, onoff=0
gpio1_vol = 1800, onoff=0
find power_sply to end
vbus exist
DRAM:  2 GiB
fdt addr: 0xb6dd3678
gd->fdt_size: 0x16400
Relocation Offset is: 75f15000
In:    serial
Out:   serial
Err:   serial
gic: normal mode
[      0.717]display init start
drv_disp_init
init_clocks: finish init_clocks.
pwm_request: reg = 0x1c23400. pwm = 0.
request pwm success, pwm = 0.
tv_init:
tv_init:
drv_disp_init finish
boot_disp.output_disp=0
boot_disp.output_type=1
boot_disp.output_mode=10
boot_disp.auto_hpd=1
disp0 device type(1) enable
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-75-LCD_cfg_panel_info 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-105-LCD_cfg_panel_info 
disp 0, clk: pll(120000000),clk(120000000),dclk(20000000) dsi_rate(20000000)
     clk real:pll(118800000),clk(118800000),dclk(29700000) dsi_rate(148500000)
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-138-LCD_power_on 
enable power vcc-3v, ret=0
***LCD_power_on_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-156-LCD_power_on 
[      0.951]display init end
[      0.953]flash init start
workmode = 0,storage type = 2
[      0.958]MMC: 2
[mmc]: mmc driver ver 2016-09-19 14:00:00
[mmc]: get sdc_ex_dly_used 2, use auto tuning sdly
SUNXI SD/MMC: 2
[mmc]: 50 MHz...
[mmc]: sample: 50 - 200(ps)
[mmc]: ds: 52 - 192(ps)
[mmc]: 100 MHz...
[mmc]: sample: 25 - 200(ps)
[mmc]: ds: 25 - 200(ps)
[mmc]: 200 MHz...
[mmc]: sample: 13 - 192(ps)
[mmc]: ds: 13 - 192(ps)
[mmc]: media type 0x8000000
[mmc]: ************Try MMC card 2************
[mmc]: host caps: 0x6f
[mmc]: MID 000015 PSN 5ca94221
[mmc]: PNM 8WPD3R -- 0x38-57-50-44-33
[mmc]: PRV 0.0
[mmc]: MDT m-12 y-2016
[mmc]: MMC v5.0
[mmc]: speed mode     : HSSDR52/SDR25 
[mmc]: clock          : 50000000 Hz
[mmc]: bus_width      : 8 bit
[mmc]: user capacity  : 7456 MB
[mmc]: boot capacity  : 4096 KB
[mmc]: rpmb capacity  : 512 KB
[mmc]: ************SD/MMC 2 init OK!!!************
[mmc]: mmc_init_boot: tuning procedure is executed!
[mmc]: ========best spd md: 2-HSDDR52/DDR50, freq: 2-50000000
[mmc]: already at HSSDR52_SDR25 mode
[mmc]: erase_grp_size      : 0x400WrBlk*0x200=0x80000 Byte
[mmc]: secure_feature      : 0x55
[mmc]: secure_removal_type : 0x9
[mmc]: EOL Info(Rev blks): Normal
[mmc]: Wear out(type A): 0%-10% life time used
[mmc]: Wear out(type B): 0%-10% life time used
[      1.086]sunxi flash init ok
[      1.090]flash init end
try to burn key
sunxi secure storage is not supported
[      1.097]usb burn from boot
delay time 0
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-383-LCD_panel_init 
***LCD_panel_init_kernel:Begin!!!
***LCD_panel_init_kernel:End!!!
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-482-LCD_panel_init 
[      1.436]usb prepare ok
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
usb sof ok
[      1.660]usb probe ok
[      1.660]usb setup ok
set address 0xb
set address 0xb ok
sunxi usb error: received bytes 0x20 is not equal cbw struct size 0x1f
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-177-LCD_bl_open 
***LCD_bl_open_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-182-LCD_bl_open 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-110-LCD_open_flow 
***LCD_open_flow_kernel
**** wyb drivers/video/sunxi/disp2/disp/lcd/S070WV20_MIPI_RGB.c-119-LCD_open_flow 
[      4.691]do_burn_from_boot usb : have no handshake
--------fastboot partitions--------
-total partitions:9-
-name-        -start-       -size-      
boot-res    : 1000000       100000      
env         : 1100000       100000      
boot        : 1200000       400000      
rootfs      : 1600000       1000000     
rootfs_data : 2600000       3000000     
private     : 5600000       100000      
recovery    : 5700000       1000000     
misc        : 6700000       100000      
UDISK       : 6800000       0           
-----------------------------------
base bootcmd=run setargs_nand boot_normal
bootcmd set setargs_mmc
key 0
cant find rcvy value
cant find fstbt value
misc partition found
[      4.747]to be run cmd=run setargs_mmc boot_normal
[mmc]: hsddr 2-50000000
[mmc]: get max-frequency ok 50000000 Hz
[mmc]: 1 1 0: 1 1 0
[mmc]: no mmc-hs400-1_8v!
[mmc]: no mmc-hs200-1_8v!
[      4.766]update dtb dram start
[      4.768]update dtb dram  end
sunxi_serial: serial_feature is not exist
serial is: 140050370310601f074e
PowerBus = 2( 2:vBus 3:acBus other: not exist)
no battery, limit to dc
no battery exist
sunxi_bmp_logo_display
reading bootlogo.bmp
38454 bytes read in 3 ms (12.2 MiB/s)
bmp file buffer: 0x40000000, bmp_info.buffer: 46400000
screen_id =0, screen_width =800, screen_height =480
frame buffer address 46400036
[      4.805]inter uboot shell
Hit any key to stop autoboot:  0 
fatload partition name: boot -> 2
reading uImage
3198328 bytes read in 39 ms (78.2 MiB/s)
## Booting kernel from Legacy Image at 43800000 ...
   Image Name:   ARM OpenWrt Linux-3.10.65
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3198264 Bytes = 3.1 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
   reserving fdt memory region: addr=43000000 size=800
   Using Device Tree in place at 45000000, end 450193ff
prepare for kernel
[mmc]: mmc exit start
[mmc]: 50 MHz...
[mmc]: sample: 24 - 416(ps)
[mmc]: ds: 24 - 416(ps)
[mmc]: 100 MHz...
[mmc]: sample: 12 - 416(ps)
[mmc]: ds: 12 - 416(ps)
[mmc]: 200 MHz...
[mmc]: sample: 8 - 312(ps)
[mmc]: ds: 8 - 312(ps)
[mmc]: mmc 2 exit ok
[      4.963]
Starting kernel ...


[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.10.65 (rootroot@cm-System-Product-Name) (gcc version 5.2.1 (OpenWrt/Linaro GCC 5.2-2015.11-2 2016-11-07) ) #4 SMP Thu Nov 2 13:49:17 UTC 2017
[    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c53c7d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] Machine: sun8iw11p1, model: sun8iw11p1
[    0.000000] cma: CMA: reserved 256 MiB at 5f800000






后来想想在BPI-M2U的Android启动的时候在kernel启动LCD的阶段也是一长串的挂载失败。（lichee使用的是：linux-3.10）
在全志R40平台的tinav2.1系统下，大概是在内核时间为4秒钟前后就会出现挂载LCD失败的信息：
全志R18的Android6.0在在kernel启动LCD的时候同样也是失败！（lichee使用的是：linux-3.10）
[    3.184454] VFS: Mounted root (squashfs filesystem) readonly on device 179:7.
[    3.192686] Freeing unused kernel memory: 192K (c05b3000 - c05e3000)
[    3.411993] init: Console is alive
[    3.415849] init: - watchdog -
[    3.419584] init: - preinit -
/dev/by-name/UDISK: UUID="5a892e64-cdd0-4602-a34c-889869fb4545" NAME="EXT_JOURNAL" VERSION="1.0" TYPE="ext4"
/dev/by-name/UDISK already format by ext4
/dev/by-name/rootfs_data: UUID="710b3ebd-d6d2-4a18-ab4e-eece2968625d" NAME="EXT_JOURNAL" VERSION="1.0" TYPE="ext4"
/dev/by-name/rootfs_data already format by ext4
[    4.001864] mount_root: mounting /dev/root
[    4.006691] mount_root: loading kmods from internal overlay
[    4.032696] [DISP]disp_module_init
[    4.037247] [DISP] boot_disp:0x10a
[    4.065335] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.076102] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.086751] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.097395] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.108040] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.118685] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.129329] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.140272] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.151085] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.161767] [DISP] disp_sys_script_get_item,line:203:of_find_compatible_node allwinner,sunxi-lcd1 fail
[    4.172121] [DISP] fb_base:0x46400000
[    4.185379] axp22_dcdc1: Failed to create debugfs directory
[    4.192594] [DISP]disp_module_init finish
[    4.206332] dhd_module_init: in
[    4.209773] ======== bcm_wlan_set_plat_data ========
[    4.215417] dhd_wifi_platform_load: Enter
[    4.219857] Power-up adapter 'DHD generic adapter'
[    4.225745] wifi_platform_set_power = 1




在全志R16的tianv2.1的系统中：
W:\lcd_r40_tianv2.1\lichee\linux-3.10\drivers\video\sunxi\disp2\disp\lcd\panels.c
struct sunxi_lcd_drv g_lcd_drv;


__lcd_panel_t* panel_array[] = {
&default_eink,
&default_panel,
&lt070me05000_panel,
&wtq05027d01_panel,
&t27p06_panel,
&dx0960be40a1_panel,
&tft720x1280_panel,
&S6D7AA0X01_panel,
&gg1p4062utsw_panel,
/* add new panel below */
//&S070WV20_MIPI_RGB_panel,
NULL,
};


panel_array数组中设置都没有S070WV20_MIPI_RGB_panel。也就是根本就不打算初始化它，也许全部关闭可以节省启动的时间！^_




那就对了。对于全志平台的MIPI屏幕驱动，linux-3.10内核的系统在uboot阶段初始化，比如：全志R40/R18。
linux-3.4的内核的系统在kernel/BOOT阶段初始化。（uboot是否有初始化过没有测试过！）比如：全志R16。
不过在编译uboot的时候，LCD的驱动会被编译，但是很快就会被删除掉！（你在SDK的相应的目录下是看不到的*.o这种临时文件的）
原因不得而知！


不过最好调试全志R40平台的时候还出现了一个奇葩的事情，背光的控制GPIO：PB10已经拉高了，但是背光不亮！
硬件检测了半个小时，最后说是一个电阻的阻值小了一点！^_

改完之后屏幕就显示uboot的开机画面了！不过那个时候，我都已经调的怀疑人生了！