I have been working to get the MIPI to HDMI adapter working with L4.9.88_2.0.0 (stock image). When going into u-boot it could not find fsl-imx8mq-evk-dcss-adv7535.dtb. It is not installed in the stock image.
I found in the Linux Binary Demo Images - i.MX 8MQuad EVK folder several .dtb files one if which included Image-fsl-imx8mq-evk-dcss-adv7535.dtb. I copied this to the same directly I found he default dtb file ( /run/media/mmcblk0p1 ). Once this was installed I was able to set in u-boot to this dtb and ran fine.
HDMI output functioned properly before and now it should display the incoming HDMI input the HDMI-MIPI adapter. I have an HDMI signal generator and have tried several video formats, resolutions, and frame rates but cannot get it to display anything. I do see the monitoring trying to display but cannot seem to get an image through.
The adapter is plugged into J1501 as instructed.
Is there a list of acceptable HDMI resolutions and frame rates? Is it HDCP compatible?