Hi, mið., 10. jan. 2024 kl. 09:27 skrifaði Maxime Ripard <mripard@xxxxxxxxxx>: > On Tue, Jan 09, 2024 at 06:11:02PM +0000, Andri Yngvason wrote: > > From: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx> > > > > Add a new general drm property "preferred color format" which can be used > > by userspace to tell the graphic drivers to which color format to use. > > > > Possible options are: > > - auto (default/current behaviour) > > - rgb > > - ycbcr444 > > - ycbcr422 (not supported by both amdgpu and i915) > > - ycbcr420 > > > > In theory the auto option should choose the best available option for the > > current setup, but because of bad internal conversion some monitors look > > better with rgb and some with ycbcr444. > > I looked at the patch and I couldn't find what is supposed to happen if > you set it to something else than auto, and the driver can't match that. > Are we supposed to fallback to the "auto" behaviour, or are we suppose > to reject the mode entirely? > > The combination with the active output format property suggests the > former, but we should document it explicitly. It is also my understanding that it should fall back to the "auto" behaviour. I will add this to the documentation. Thanks, Andri
