Difference between revisions of "How to Config Multi-Display for RK3399 RSB4710"
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<pre>setenv prmry_screen lvds-g070vw01 | <pre>setenv prmry_screen lvds-g070vw01 | ||
− | + | setenv extend_screen hdmi-default | |
saveenv | saveenv | ||
reset | reset |
Revision as of 08:58, 27 August 2021
Contents
RSB-4710 surport 4 display ports : eDP、LVDS(mipi to LVDS)、HDMI、DP (DP to HDMI). Only two ports work at the same time .
You can config Multi-Display to eDP + HDMI 、eDP + LVDS、LVDS + HDMI 、eDP + DP、LVDS + DP、HDMI + DP.
NOTE:
Android distinguish the primary and the extend screen.
Contents
[hide]
- 1 Enter U-boot interrupt mode
- 2 eDP + HDMI
- 3 eDP + LVDS
- 4 LVDS + HDMI
- 5 eDP + DP
- 6 LVDS + DP
- 7 HDMI + DP
- 8 Default Support Display
Enter U-boot interrupt mode
Connect device to debug port, and open debug console. See more : How_to_debug.
Press "ctrl + c" key before power up the device, until get the following information on debug console :
Hit any key to stop autoboot: 0 => <INTERRUPT> =>
Then you can input the following cammand to config Multi-Display.
eDP + HDMI
setenv prmry_screen edp-1920x1080 setenv extend_screen hdmi-default saveenv reset
or
setenv prmry_screen hdmi-default setenv extend_screen edp-1920x1080 saveenv reset
eDP + LVDS
setenv prmry_screen edp-1920x1080 setenv extend_screen lvds-g070vw01 saveenv reset
or
setenv prmry_screen lvds-g070vw01 setenv extend_screen edp-1920x1080 saveenv reset
LVDS + HDMI
setenv prmry_screen hdmi-default setenv extend_screen lvds-g070vw01 saveenv reset
or
setenv prmry_screen lvds-g070vw01 setenv extend_screen hdmi-default saveenv reset
eDP + DP
setenv prmry_screen edp-1920x1080 setenv extend_screen dp-default saveenv reset
or
setenv prmry_screen dp-default setenv extend_screen edp-1920x1080 saveenv reset
LVDS + DP
setenv prmry_screen dp-default setenv extend_screen lvds-g070vw01 saveenv reset
or
setenv prmry_screen lvds-g070vw01 setenv extend_screen dp-default saveenv reset
HDMI + DP
setenv prmry_screen hdmi-default setenv extend_screen dp-default saveenv reset
or
setenv prmry_screen dp-fefault setenv extend_screen hdmi-default saveenv reset
Default Support Display
Port | RSB4710 |
edp | edp-1920x1080 edp-1366x768 |
lvds | lvds-g070vw01 lvds-g150xgel05 lvds-g215hvn01 |
hdmi | hdmi-default |
dp | dp-default |
NOTE :
1. The name of the panel must begin with "edp-"、"lvds-" 、"hdmi-" or “dp-”.
And it can be found in "kernel/include/dt-bindings/display/screen-timing/{LCDNAME}.dtsi" like :
lvds_g070vw01: lvds-g070vw01
2. If there is no configuration, you will get default setting :
hdmi-default and dp-default as default setting.
3. Check your configuration in Terminal or debug console.
cat /proc/cmdline ... prmry_screen=hdmi-default extend_screen=dp-default
LVDS Name | Resolution |
lvds-g070vw01 |
800x480 |
lvds-g150xgel05 |
1024x768 |
lvds-g215hvn01 |
1920x1080 |
Using envtools in Debian/Android
Using envtools to setup envs in Debian/Android OS is very similar in uboot.
Take “eDP+HDMI”for example :
In uboot | In Debian/Android |
setenv prmry_screen hdmi-default |
fw_setenv prmry_screen hdmi-default |
setenv extend_screen edp-1920x1080 | fw_setenv extend_screen edp-1920x1080 |
saveenv | |
reset | reboot |
Note :
The tool "fw_setenv" will save envs automatically in Debian/Android OS, so it isn't necessary to saveen manually.