drm/nv31/mpeg: support for a single class3174 user
Uncertain if/how the hw does multiple PMPEG channels, supporting one is
better than none however.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv31_mpeg.c b/drivers/gpu/drm/nouveau/nv31_mpeg.c
index 72e8666..6f06a07 100644
--- a/drivers/gpu/drm/nouveau/nv31_mpeg.c
+++ b/drivers/gpu/drm/nouveau/nv31_mpeg.c
@@ -28,8 +28,30 @@
struct nv31_mpeg_engine {
struct nouveau_exec_engine base;
+ atomic_t refcount;
};
+
+static int
+nv31_mpeg_context_new(struct nouveau_channel *chan, int engine)
+{
+ struct nv31_mpeg_engine *pmpeg = nv_engine(chan->dev, engine);
+
+ if (!atomic_add_unless(&pmpeg->refcount, 1, 1))
+ return -EBUSY;
+
+ chan->engctx[engine] = (void *)0xdeadcafe;
+ return 0;
+}
+
+static void
+nv31_mpeg_context_del(struct nouveau_channel *chan, int engine)
+{
+ struct nv31_mpeg_engine *pmpeg = nv_engine(chan->dev, engine);
+ atomic_dec(&pmpeg->refcount);
+ chan->engctx[engine] = NULL;
+}
+
static int
nv40_mpeg_context_new(struct nouveau_channel *chan, int engine)
{
@@ -121,7 +143,7 @@
/* PMPEG init */
nv_wr32(dev, 0x00b32c, 0x00000000);
nv_wr32(dev, 0x00b314, 0x00000100);
- nv_wr32(dev, 0x00b220, 0x00000044);
+ nv_wr32(dev, 0x00b220, nv44_graph_class(dev) ? 0x00000044 : 0x00000031);
nv_wr32(dev, 0x00b300, 0x02001ec1);
nv_mask(dev, 0x00b32c, 0x00000001, 0x00000001);
@@ -191,6 +213,10 @@
unsigned long flags;
int i;
+ /* hardcode drm channel id on nv3x, so swmthd lookup works */
+ if (dev_priv->card_type < NV_40)
+ return 0;
+
spin_lock_irqsave(&dev_priv->channels.lock, flags);
for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
if (!dev_priv->channels.ptr[i])
@@ -275,17 +301,24 @@
int
nv31_mpeg_create(struct drm_device *dev)
{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv31_mpeg_engine *pmpeg;
pmpeg = kzalloc(sizeof(*pmpeg), GFP_KERNEL);
if (!pmpeg)
return -ENOMEM;
+ atomic_set(&pmpeg->refcount, 0);
pmpeg->base.destroy = nv31_mpeg_destroy;
pmpeg->base.init = nv31_mpeg_init;
pmpeg->base.fini = nv31_mpeg_fini;
- pmpeg->base.context_new = nv40_mpeg_context_new;
- pmpeg->base.context_del = nv40_mpeg_context_del;
+ if (dev_priv->card_type < NV_40) {
+ pmpeg->base.context_new = nv31_mpeg_context_new;
+ pmpeg->base.context_del = nv31_mpeg_context_del;
+ } else {
+ pmpeg->base.context_new = nv40_mpeg_context_new;
+ pmpeg->base.context_del = nv40_mpeg_context_del;
+ }
pmpeg->base.object_new = nv31_mpeg_object_new;
/* ISR vector, PMC_ENABLE bit, and TILE regs are shared between