屏幕翻转

in the build.prop ：

persist.panel.mountflip

值为：

 3 – Panel flipped both horizontally and vertically 面板水平和垂直翻转
 2 – Panel is flipped vertically 面板垂直翻转
 1 – Panel is flipped horizontally 面板水平翻转
 0 – Default, no flip 默认，无翻转

&&&：

由于UEFI（引导徽标）中仅显示一个图像，因此可以反转源图像，然后在显示器上显示。

确保时钟输出：

a. Use the following adb command:

adb root
adb remount
adb shell
#mount -t debugfs none /sys/kernel/debug
#cd /sys/kernel/debug/clk/ mmss_mdss_esc0_clk
#cat measure

see Display Drivers (ACPI and XML) Configuration Guide (80-NB116-2).

uefi

power supplies:

boot_images/qcompkg//settings/pmic/core/pm_config_appsbl_npa_node_rsrcs.c.

PanelOrientation :

器件翻转：

 2 – Panel is flipped vertically 垂直翻转
 0 – Default, no flip 默认，不翻转

某些面板需要DSI TLpx参数的特定值，因此需要不同的转义时钟值，而不是19.2 MHz的标准转义时钟值。

9600000

Figure B-1 DisplayDxe program flow ：

adb shell cat /firmware/verinfo/ver_info.txt

C:\Windows\SysWOW64\adb>adb shell cat /firmware/verinfo/ver_info.txt
{
“Image_Build_IDs”: {
“adsp”: “ADSP.VT.4.0-00341-SDM660-1”,
“apps”: “LA.UM.6.2.r1-08900-sdm660.0-1”,
“boot”: “BOOT.XF.1.4-00256-S660LZB-1”,
“btfm”: “BTFM.CHE.2.1.1.c2-00156-QCACHROMZ-1”,
“common”: “SDM636.LA.2.1-21292-STD.PROD-1”,
“cpev2”: “CPE.TSF.2.0-00006-W9335AAAAAAAZQ-1”,
“glue”: “GLUE.SDM660_LA.2.0-00042-NOOP_TEST-1”,
“modem”: “MPSS.AT.3.1-00742-SDM660_GEN_PACK-1”,
“rpm”: “RPM.BF.1.8-00052-SDM660AAAAANAZR-1”,
“tz”: “TZ.BF.4.0.7-00093-S660AAAAANAZT-1”,
“video”: “VIDEO.VE.4.4-00039-PROD-1”,
“wdsp”: “WDSP.9340.1.0.c1-00008-W9340AAAAAAAZQ-1”,
“wlan”: “WLAN.HL.1.0.1.c2-00436-QCAHLSWMTPLZ-1”
},
“Metabuild_Info”: {
“Meta_Build_ID”: “SDM636.LA.2.1-21292-STD.PROD-1”,
“Product_Flavor”: “asic”,
“Time_Stamp”: “2018-06-26 02:05:21”
},
“Version”: “1.0”
}

设置默认屏：

fastboot oem select-display-panel none