AnsweredAssumed Answered

i.Mx6Q dual display with HDMI and LCD on linux QT

Question asked by nick ruan on Feb 4, 2017
Latest reply on Aug 12, 2018 by 俊凯 文

Hi supporter,

My iMx6Q board is runing linux+QT, HDMI and LCD device are connected.

I want to support dual display, and set environment in uboot as follow:

setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=lcd,TIANMA050-WVGA@60,bpp=32,if=RGB24 video=mxcfb1:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb2:off ldo_active=on'

LCD can display, but HDMI can't output.


If I change the environment:

setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb1:dev=lcd,TIANMA050-WVGA@60,bpp=32,if=RGB24 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb2:off ldo_active=on'

HDMI can output, but LCD can't display.


Dose it mean that kernel don't support dual display or dual dispaly is implmented by applicantion?