View source for How to Config Multi-Display RK3568


RK3568 has 3 VPorts.&nbsp;

[[File:RK3568 Vport.png|RTENOTITLE]]

RSB-4810/ROM-5880 surport 4 types&nbsp;display&nbsp;: eDP、LVDS、HDMI、MIPI.&nbsp;

'''Note：'''

1. HDMI、eDP、MIPI MUST be set to port 0 and port 1.

2. LVDS MUST be set to port 1&nbsp;and port 2.

3.&nbsp; LVDS and MIPI are alternative.

&nbsp;

&nbsp;

== Enter U-boot interrupt mode ==

Connect device to debug port, and open debug console. See more&nbsp;: [http://ess-wiki.advantech.com.tw/view/How_to_debug_RK3568 How_to_debug].

Press&nbsp;"ctrl + c" key before power up the device, until get the following information on debug console&nbsp;:&nbsp;
<pre>Hit any key to stop autoboot: 0
=> <INTERRUPT>
=>
</pre>

Then you can&nbsp;input the following cammand to config Multi-Display.

{| border="1" cellpadding="0" cellspacing="0" style="width: 655px;" width="494"
|-
| height="20" width="72" | Module
| width="133" | Sub Module
| width="289" | Step
| style="width: 326px;" width="289" | In Uboot
|-
| height="240" rowspan="4" width="72" | Single
| width="133" | HDMI
| width="289" | fw_setenv display0 hdmi-default<br/> fw_setenv display1<br/> fw_setenv display2
| style="width: 326px;" width="289" | 
setenv display0 hdmi-default<br/> setenv display1<br/> setenv display2

|-
| height="60" width="133" | LVDS
| width="289" | fw_setenv display0<br/> fw_setenv display1 lvds-g070vw01<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0<br/> setenv display1 lvds-g070vw01<br/> setenv display2
|-
| height="60" width="133" | eDP
| width="289" | fw_setenv display0 edp-1366x768<br/> fw_setenv display1<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 edp-1366x768<br/> setenv display1<br/> setenv display2
|-
| height="60" width="133" | MIPI
| width="289" | fw_setenv display0 mipi-gl0uan<br/> fw_setenv display1<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 mipi-gl0uan<br/> setenv display1<br/> setenv display2
|-
| height="300" rowspan="5" width="72" | Dual
| width="133" | HDMI+LVDS
| width="289" | fw_setenv display0 hdmi-default<br/> fw_setenv display1 lvds-g070vw01<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 hdmi-default<br/> setenv display1 lvds-g070vw01<br/> setenv display2
|-
| height="60" width="133" | HDMI+eDP
| width="289" | fw_setenv display0 hdmi-default<br/> fw_setenv display1 edp-1366x768<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 hdmi-default<br/> setenv display1 edp-1366x768<br/> setenv display2
|-
| height="60" width="133" | eDP+LVDS
| width="289" | fw_setenv display0 edp-1366x768<br/> fw_setenv display1 lvds-g070vw01<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 edp-1366x768<br/> setenv display1 lvds-g070vw01<br/> setenv display2
|-
| height="60" width="133" | HDMI+MIPI
| width="289" | fw_setenv display0 hdmi-default<br/> fw_setenv display1 mipi-gl0uan<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 hdmi-default<br/> setenv display1 mipi-gl0uan<br/> setenv display2
|-
| height="60" width="133" | eDP+MIPI
| width="289" | fw_setenv display0 edp-1366x768<br/> fw_setenv display1 mipi-gl0uan<br/> fw_setenv display2
| style="width: 326px;" width="289" | setenv display0 edp-1366x768<br/> setenv display1 mipi-gl0uan<br/> setenv display2
|}

'''Note&nbsp;:'''

LVDS panel support 4 bus format: rgb666_vesa、rgb888_vesa、rgb666_jeida、rgb888_jeida.

If lvds panel is not the default format of&nbsp;rgb888_vesa, Must set lvds format&nbsp;:
<pre>fw_setenv lvds_format rgb666_vesa
or
fw_setenv lvds_format rgb666_jeida
or
fw_setenv lvds_format rgb888_jeida

</pre>

== Default Support Display ==

{| border="1" cellpadding="1" cellspacing="1"
|-
| '''Port'''
| 
'''RSB-4810'''

'''ROM-5880'''

|-
| edp
| edp-1920x1080<br/> edp-1366x768
|-
| lvds
| 
lvds-g070vw01<br/> lvds-g150xgel05

lvds-800x480

lvds-1024x768

lvds-1280x720

lvds-1280x768

lvds-1280x800

lvds-1366x768

|-
| dual-lvds
| lvdsdual-1920x1080
|-
| hdmi
| hdmi-default
|-
| mipi
| mipi-gl0uan
|}

<br/> '''NOTE&nbsp;:&nbsp;'''

1. The name of the panel must begin with "edp-"、"lvds-" 、"hdmi-"&nbsp; or “dp-”.

And it can be found in "kernel/include/dt-bindings/display/screen-timing/{LCDNAME}.dtsi" like&nbsp;:

lvds_g070vw01:&nbsp;'''lvds-g070vw01'''

2. If there is no configuration, you will get default setting&nbsp;:

hdmi-default&nbsp; and&nbsp;edp-1366x768 as default setting.

3. Check your configuration in Terminal or debug console.
<pre>fw_printenv | grep display
... 
display0=hdmi-default
display1=edp-1366x768
...
</pre>

{| border="1" cellpadding="1" cellspacing="1"
|-
| LVDS Name
| Resolution
|-
| lvds-g070vw01
| 800x480
|-
| lvds-g150xgel05
| 1024x768
|}

== Using envtools in Debian/Android ==

Using envtools to setup envs in Debian/Android OS is very similar in uboot.

Take “eDP+HDMI”for example&nbsp;:

{| border="1" cellpadding="1" cellspacing="1"
|-
| '''In uboot'''
| '''In Debian/Android'''
|-
| setenv display0 hdmi-default
| fw_setenv display0&nbsp;hdmi-default
|-
| setenv display1 edp-1920x1080
| fw_setenv display0 edp-1920x1080
|-
| saveenv
| &nbsp;
|-
| reset
| reboot
|}

'''Note&nbsp;:'''

The tool "fw_setenv" will save envs automatically in Debian/Android OS, so it isn't necessary to saveenv manually.