drm/nvc0: support for sw methods + enable page flipping

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_display.c

@@ -224,6 +224,7 @@ nouveau_page_flip_emit(struct nouveau_channel *chan,
 		       struct nouveau_page_flip_state *s,
 		       struct nouveau_fence **pfence)
 {
+	struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
 	struct drm_device *dev = chan->dev;
 	unsigned long flags;
 	int ret;
@@ -243,9 +244,12 @@ nouveau_page_flip_emit(struct nouveau_channel *chan,
 	if (ret)
 		goto fail;
 
+	if (dev_priv->card_type < NV_C0)
 		BEGIN_RING(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
-	OUT_RING(chan, 0);
-	FIRE_RING(chan);
+	else
+		BEGIN_NVC0(chan, 2, NvSubM2MF, 0x0500, 1);
+	OUT_RING  (chan, 0);
+	FIRE_RING (chan);
 
 	ret = nouveau_fence_new(chan, pfence, true);
 	if (ret)

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -1118,7 +1118,7 @@ int nouveau_ioctl_getparam(struct drm_device *dev, void *data,
 		getparam->value = 1;
 		break;
 	case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
-		getparam->value = (dev_priv->card_type < NV_C0) ? 1 : 0;
+		getparam->value = 1;
 		break;
 	case NOUVEAU_GETPARAM_GRAPH_UNITS:
 		/* NV40 and NV50 versions are quite different, but register

drivers/gpu/drm/nouveau/nvc0_graph.c

@@ -298,6 +298,14 @@ nvc0_graph_takedown(struct drm_device *dev)
 	nvc0_graph_destroy(dev);
 }
 
+static int
+nvc0_graph_mthd_page_flip(struct nouveau_channel *chan,
+			  u32 class, u32 mthd, u32 data)
+{
+	nouveau_finish_page_flip(chan, NULL);
+	return 0;
+}
+
 static int
 nvc0_graph_create(struct drm_device *dev)
 {
@@ -395,6 +403,7 @@ nvc0_graph_create(struct drm_device *dev)
 	nouveau_irq_register(dev, 25, nvc0_runk140_isr);
 	NVOBJ_CLASS(dev, 0x902d, GR); /* 2D */
 	NVOBJ_CLASS(dev, 0x9039, GR); /* M2MF */
+	NVOBJ_MTHD (dev, 0x9039, 0x0500, nvc0_graph_mthd_page_flip);
 	NVOBJ_CLASS(dev, 0x9097, GR); /* 3D */
 	NVOBJ_CLASS(dev, 0x90c0, GR); /* COMPUTE */
 	return 0;
@@ -728,9 +737,12 @@ nvc0_graph_isr(struct drm_device *dev)
 	u32 class = nv_rd32(dev, 0x404200 + (subc * 4));
 
 	if (stat & 0x00000010) {
-		NV_INFO(dev, "PGRAPH: ILLEGAL_MTHD ch %d [0x%010llx] subc %d "
-			     "class 0x%04x mthd 0x%04x data 0x%08x\n",
+		if (nouveau_gpuobj_mthd_call2(dev, chid, class, mthd, data)) {
+			NV_INFO(dev, "PGRAPH: ILLEGAL_MTHD ch %d [0x%010llx] "
+				     "subc %d class 0x%04x mthd 0x%04x "
+				     "data 0x%08x\n",
 				chid, inst, subc, class, mthd, data);
+		}
 		nv_wr32(dev, 0x400100, 0x00000010);
 		stat &= ~0x00000010;
 	}