Hi! I have an old tv that only works well with FullRGB HDMI signals. If YCbCr is used then the tv interrupts the hdmi link every few minutes and after a new hdmi negotiation the screen turns greenish. So I have to switch to another hdmi input and switch back to force a new negotiation which maybe works- very annoying. Running Windows I can switch the output to FullRGB in AMD Radeon Software Adrenalin edition and everything is fine, so I assume that in Linux YCbCr is used by default (too). In X.Org log file I find "AMDGPU(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4" so it seems to be possible. But X.Org config: Option "ColorRange""Full" Option "ColorSpace""RGB" Is ignored.
This needs to be supported by the kernel driver (first), reassigning. (In reply to Heiko Lechner from comment #0) > In X.Org log file I find "AMDGPU(0): Supported color encodings: RGB 4:4:4 > YCrCb 4:4:4" so it seems to be possible. That's just Xorg itself printing information from EDID.
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