How could I change 1080p display to 720p display on i.MX 8QuadXPlus MEK Board

[xinchuan]

Hello,

Board: i.MX 8QuadXPlus  MEK Board

Version: android_O8.1.0_1.1.0_AUTO-EAR

Display:LVDS to HDMI with IT6263

How can I change the 1080p display to 720p display.

I noticed that there is a "video=HDMI-A-1:1920x1080-32@60" arg on i.MX8QuadMax MEK board.

but this arg does not work on i.MX 8QuadXPlus  MEK Board.

please help me.

thanks a lot.

[b36401]

You can change this option in u-boot configuration accordingly to actual display resolution.
I mean you can enter u-boot command prompt then overwrite the option and then perform "saveenv" to save the configuration.

Have a great day,
Victor

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[xinchuan]

Hi Victor,

    Thanks for your reply.

    But I am not sure about the ‘video=’ part in the u-boot cmdline.

    If I set it "video=HDMI-A-1:1280x720-32@60",

    cat /sys/class/graphics/fb0/modes

    U:1280x720p-0

    But the display resolution is still 1080p.

    If I set it "video=mxcfb0:dev=ldb,1280x720-32@60" ,

    the kernel log showed "drm_helper_probe_add_cmdline_mode cmdline_mode->specified ==0 ",the display resolution is still 1080p.

   Can you give some details?

Thanks a lot.

Nice day.

XinChuan