AnsweredAssumed Answered

IMX8QXP MEK HDMI ISSUE

Question asked by Lars Andersson on Jan 27, 2020
Latest reply on Jan 27, 2020 by igorpadykov

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?

Outcomes