radeonsi: make the DRI_PRIME dGPU -> iGPU copy async
Doing this copy using SDMA frees up the dGPU to do more
interesting things while the copy is happening; for instance
the rendering of the next frame.
hw queue activity before:
------------------------
dGPU:
gfx: [renderframe 1][copy->iGPU][renderframe 2][copy->iGPU]...
iGPU:
gfx: [Xorg] [Xorg]
hw queue activity before after:
------------------------------
dGPU:
gfx: [renderframe 1][renderframe 2][renderframe 3]....
sdma: [copy->iGPU] [copy->iGPU] [copy->iGPU]
iGPU:
gfx: [Xorg] [Xorg] ...
If SDMA isn't available or can't do the copy, use an async compute
context instead.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12763>
1 file changed
