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

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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>
This commit is contained in:
Ben Skeggs 2018-05-08 20:39:46 +10:00
parent 665870837a
commit 4f2fc25c0f
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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@ -170,10 +170,10 @@ 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);