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nv50: when destroying a channel make sure it's not still current on PFIFO 

We won't get a PFIFO context switch when the same channel ID is recreated if
the hw still thinks the channel is already active, which causes fun issues.

Should allow X to be stopped and started without tearing down the entire
card state in lastclose().
main
Ben Skeggs 2008-06-25 16:45:41 +10:00 committed by Maarten Maathuis
parent 5a0164d1e1
commit be72762816
1 changed files with 4 additions and 0 deletions
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4
shared-core/nv50_fifo.c
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@ -289,6 +289,7 @@ void
nv50_fifo_destroy_context(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
DRM_DEBUG("ch%d\n", chan->id);
@ -298,6 +299,9 @@ nv50_fifo_destroy_context(struct nouveau_channel *chan)
if (chan->id == 0)
nv50_fifo_channel_disable(dev, 127, 0);
if ((NV_READ(NV03_PFIFO_CACHE1_PUSH1) & 0xffff) == chan->id)
NV_WRITE(NV03_PFIFO_CACHE1_PUSH1, 127);
nouveau_gpuobj_ref_del(dev, &chan->ramfc);
}