https://bugs.freedesktop.org/show_bug.cgi?id=83226
--- Comment #27 from Alex Deucher alexdeucher@gmail.com --- (In reply to Pitscho from comment #20)
I've read a lot about tvrgb here, what is about YCbCr. My Tv for example produces a better picture with this space compared to limited RGB.
If you set your TV to use YUV and set output_csc to ycbcr601 or ycbcr709, it may work. Depending on your display, you may also have to adjust the hdmi packets the driver sends.