How to force RGB colorspace for KMS display?

[whoman321]

How can I force the framebuffer / kernel display to RGB mode instead of YCbCr?

Here's the problem:

I'm using RK3328 with Gstreamer, MPP, and KMSsink to output video to a screen with HDMI.

Some older screens/TVs/etc incorrectly report EDID that they can use YCbCr etc, but really they only support RGB limited.

The kernel then boots the display into YCbCr, and the display looks green (wrong colorspace).

How can I force the kernel to boot into RGB colorspace?

Please Note: I'm not using X. I'm using Gstreamer with Rockchip's KMSsink.

Thank you.

[whoman321]

Not needed any longer