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drm/nouveau/fifo/gk104-: poll for runlist update completion

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[ Upstream commit 4f2fc25c0f ]

Newer HW doesn't appear to send this event, which will cause long delays
in runlist updates if they don't complete immediately.

RM doesn't use these events anywhere, and an NVGPU commit message notes
that polling is the preferred method even on HW that supports the event.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Skeggs
2018-05-08 20:39:46 +10:00
committed by Greg Kroah-Hartman
parent fdb5207dc1
commit 33775b0742
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
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@@ -155,10 +155,10 @@ gk104_fifo_runlist_commit(struct gk104_fifo *fifo, int runl)
(target << 28));
nvkm_wr32(device, 0x002274, (runl << 20) | nr);
if (wait_event_timeout(fifo->runlist[runl].wait,
!(nvkm_rd32(device, 0x002284 + (runl * 0x08))
& 0x00100000),
msecs_to_jiffies(2000)) == 0)
if (nvkm_msec(device, 2000,
if (!(nvkm_rd32(device, 0x002284 + (runl * 0x08)) & 0x00100000))
break;
) < 0)
nvkm_error(subdev, "runlist %d update timeout\n", runl);
unlock:
mutex_unlock(&subdev->mutex);