Custom Resolution Utility (CRU)

[pneumatic]

Hello,

Is it possible to force a "pixel format" setting (eg. RGB/YCbCr 4:4:4/4:2:0) for AMD GPUs, such as with a registry edit or EDID tweak?

My problem is that I cannot get my R9 380 to output 1080p YCbCr 4:4:4 over HDMI to my TV -- I'm only getting 4:2:2 even though I've selected YCbCr 4:4:4 in AMD's Radeon Software.

I am 100% certain it is not my TV's fault, as I have a set top box which outputs 1080p YCbCr 4:4:4 over HDMI and have confirmed it with Rtings test pattern on red/blue 1px lines.

I am 100% certain the GPU is capable of outputting 1080p YCbCr 4:4:4, as I have it outputting to my PC monitor right now and the test pattern is good.

I have also tried RGB 4:4:4 in Radeon Software -- still fails the test pattern on my TV.

So I think the AMD driver has a bug where it doesn't play nice with my TV and keeps insisting on downconverting it to 4:2:2. Maybe it thinks my TV isn't capable of 4:4:4 and only negotiates a 4:2:2 signal?

Any help appreciated.