https://bugs.freedesktop.org/show_bug.cgi?id=84944
--- Comment #14 from warpme@o2.pl --- (In reply to Christian König from comment #13)
Page flipping operations are tear free, so what we see here is that without deinterlacing the graphics stack uses page flipping and with deinterlacing it uses glamor with of course results in badly tearing of the video.
Indeed - infrastructure for flipping seems to be ready:
[837858.379] (II) RADEON(0): KMS Pageflipping: enabled [837858.379] (II) RADEON(0): SwapBuffers wait for vsync: enabled [837858.389] (II) RADEON(0): Output HDMI-0 using monitor section Monitor1
The question is why the heck do we fallback to a copy operation with glamor when deinterlacing is enabled?
If You believe we should do some tests with added debug outputs - I'm more than happy to do so :-)