summaryrefslogtreecommitdiff
authorMaxim Levitsky <maximlevitsky@gmail.com>2012-08-13 23:22:07 (GMT)
committer Ben Skeggs <bskeggs@redhat.com>2012-08-13 23:36:53 (GMT)
commit2064db725cc6d4ea19a24c138bc37939b63e3ae6 (patch) (side-by-side diff)
tree5e55c8a87408bfc2382676a763021842f70ed286
parentfe0aac129c247be62fd8ad697ff510523fd71f74 (diff)
downloadlinux-2.6-2064db725cc6d4ea19a24c138bc37939b63e3ae6.zip
linux-2.6-2064db725cc6d4ea19a24c138bc37939b63e3ae6.tar.gz
drm/nv86/fifo: suspend fix
This fix is a backport from the reworked nouveau driver. It masks off the engines we're not expecting to use before attempting a channel kickoff. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--drivers/gpu/drm/nouveau/nv84_fifo.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv84_fifo.c b/drivers/gpu/drm/nouveau/nv84_fifo.c
index cc82d79..c564c5e 100644
--- a/drivers/gpu/drm/nouveau/nv84_fifo.c
+++ b/drivers/gpu/drm/nouveau/nv84_fifo.c
@@ -117,17 +117,22 @@ nv84_fifo_context_del(struct nouveau_channel *chan, int engine)
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
unsigned long flags;
+ u32 save;
/* remove channel from playlist, will context switch if active */
spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
nv_mask(dev, 0x002600 + (chan->id * 4), 0x80000000, 0x00000000);
nv50_fifo_playlist_update(dev);
+ save = nv_mask(dev, 0x002520, 0x0000003f, 0x15);
+
/* tell any engines on this channel to unload their contexts */
nv_wr32(dev, 0x0032fc, chan->ramin->vinst >> 12);
if (!nv_wait_ne(dev, 0x0032fc, 0xffffffff, 0xffffffff))
NV_INFO(dev, "PFIFO: channel %d unload timeout\n", chan->id);
+ nv_wr32(dev, 0x002520, save);
+
nv_wr32(dev, 0x002600 + (chan->id * 4), 0x00000000);
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
@@ -184,10 +189,13 @@ nv84_fifo_fini(struct drm_device *dev, int engine, bool suspend)
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv84_fifo_priv *priv = nv_engine(dev, engine);
int i;
+ u32 save;
/* set playlist length to zero, fifo will unload context */
nv_wr32(dev, 0x0032ec, 0);
+ save = nv_mask(dev, 0x002520, 0x0000003f, 0x15);
+
/* tell all connected engines to unload their contexts */
for (i = 0; i < priv->base.channels; i++) {
struct nouveau_channel *chan = dev_priv->channels.ptr[i];
@@ -199,6 +207,7 @@ nv84_fifo_fini(struct drm_device *dev, int engine, bool suspend)
}
}
+ nv_wr32(dev, 0x002520, save);
nv_wr32(dev, 0x002140, 0);
return 0;
}