IMX8QXP MEK HDMI ISSUE

lars_r_andersso — Mon, 27 Jan 2020 15:02:45 GMT

Hi,

I'm trying to connect an HDMI touch screen with an unusual resolution (1544x720) to my IMX8QXP MEK devkit, using the IMX-LVDS-HDMI adapter.

Looking at the EDID reported by the screen, it prefers the following modeline:

Modeline "Mode 0" 150.00 1544 1552 1902 3190 720 728 732 764 -hsync -vsync

I'm running Weston under Yocto Warrior, kernel imx8qxpmek 4.19.35-1.1.0+g0f9917c56d59.

I do get an image on the touch screen, but it's shifted about 1026 pixels to the right, leaving the leftmost 1026 pixels on the screen blank and the remaining 1544-1026=518 rightmost pixels showing the wayland desktop:

This screen works fine on all PC desktop and laptops we have tested, but also fails (with a corrupt image) on a Raspberry Pi 3B+.

Any idea how to fix this?

Re: IMX8QXP MEK HDMI ISSUE

igorpadykov — Mon, 27 Jan 2020 23:36:41 GMT

Hi Lars

one can try patch provided on

iMX8QM/QXP Reference Patch to Map Bridge Chip t... | NXP Community

Best regards
igor
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topic Re: IMX8QXP MEK HDMI ISSUE in i.MX Processors

IMX8QXP MEK HDMI ISSUE

Re: IMX8QXP MEK HDMI ISSUE