For our application we have only one defined projector for HDMI output. So all parameters for resolution, frame rate etc. are fixed. A communication between Apalis and monitor is not necessary.
Is it possible to preset monitor settings and disable/ignore the DDC communication?
hi frank
which version of bsp are you using?
Is it possible to preset monitor settings and disable/ignore the DDC communication?
You can fix the settings in the software and it should work.
I use the linux BSP 2.7b5.
Where are the settings? Thanks.
With the Kernel you are using, the settings are not easy to do. You have to change the EDID driver and we do not have any experience doing this with TK1. There is an example to do this with i.MX6 which might be useful for you.
May I ask you, what is your use-case? Does the projector not support DDC?
We had some problems with the Apalis TK1 board (errata #7). We could implement the workaround, but without DDC we could work without HW changes.
There is hardware workaround, which you probably already tried.
I’ve ported imx6 change to tk1 kernel:
https://share.toradex.com/sjnyxhzx45tkc0c
Your EDID goes here:
arch/arm/boot/dts/tegra124-platforms/tegra124-apalis-displays.dtsi
My EDID is 256 bytes (v2.0) instead of 128 bytes in your example.
Is that a problem or is it compatible?
It should work with EDIDs up to 512 bytes.
I tested it. Works great. Thank you for your support.
Perfect. Thanks for the feedback.
