On 02/09/16 10:17 AM, Michel Dänzer wrote: > On 02/09/16 12:58 AM, Leo Liu wrote: >> On 09/01/2016 11:54 AM, Nayan Deshmukh wrote: >>> >>> I saw the code in dri3_glx.c and I could somewhat relate some basic >>> code structure to the vl_winsys_dri3.c. But I am new to this and not aware >>> of the >>> terminology that you used about the buffers. Could you please explain what >>> needs >>> to be done in more detail or point me to where I can read about it. >> >> I believe it's from loader_dri3_helper.c with "is_different_gpu" >> condition true, that will include back buffer and front buffer case. >> you could try only back buffer case for now. > > From a high level, PRIME mainly affects presentation, not so much the > video decoding / rendering. The important thing is that the buffer used > for presentation via the Present extension is linear, not tiled. I'm not > sure whether it makes more sense to allocate a separate linear buffer > for this purpose, as is done for GLX, or for the vl code to make the > corresponding back (or front?) buffer linear in the first place.
A separate linear buffer is probably better, actually, since it will also be pinned to system memory while it's being shared with another GPU. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
