drm/amdgpu/gfx: keep all compute queues on the same pipe

Spreading them causes performance regressions using compute
queues on Polaris 11.

Cc: Jim Qu <jim.qu@amd.com>
Acked-by: Jim Qu <Jim.Qu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index e26108aad3fe246bfd12d9e1417c91a353cef5e3..4f6c68fc1dd91a43813a2782bbc9cf3dbbf43ded 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -125,7 +125,8 @@ void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
                if (mec >= adev->gfx.mec.num_mec)
                        break;
 
-               if (adev->gfx.mec.num_mec > 1) {
+               /* FIXME: spreading the queues across pipes causes perf regressions */
+               if (0) {
                        /* policy: amdgpu owns the first two queues of the first MEC */
                        if (mec == 0 && queue < 2)
                                set_bit(i, adev->gfx.mec.queue_bitmap);