IMX6QPSabresd Hdmi resolution problem

[vaudoitlaurent]

Hi,

i've build the xwayland distro for imx6qpsabresd board, based on yocto thud and 

uboot 2019-04 and kernel 4.19.35.

I have a hdmi panel plugged.

On uboot i'm able to get 1920*1080*60 resolution.

on the bootargs i have:

console=ttymxc0,115200 video=mxcfb0:dev=hdmi,1920*1080M@60,bpp=32 root=/dev/mmcblk2p2 rootwait rw

but when kernel starts, the panel switch to 640*480. I'm not able to get 1920*1080 as default.

after, when changing in /sys/class/graphics/fb0/mode, the resolution change but the display is not correct.

the same distro/kernel/uboot/display on a imx6qpwandboard works well

Any idea is welcome !

Thanks in advance

[igorpadykov]

Hi Laurent

command line arguments are described in linux documentation (Release Notes,

Linux Guide) on nxp software web page

i.MX Software | NXP 

Best regards
igor
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[vaudoitlaurent]

Hi,

my mistake,

the problem was the command line, 

we must not use * but x for the resolution

1920x1080

with this it works perfectly