drm/nv50-/disp: handle supervisor tasks from workqueue

i2c_algo_bit sleeps...
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/engine/disp/nv50.c

@@ -940,7 +940,6 @@ nv50_disp_intr_unk10(struct nv50_disp_priv *priv, u32 super)
 			exec_script(priv, head, 1);
 	}
 
-	nv_wr32(priv, 0x610024, 0x00000010);
 	nv_wr32(priv, 0x610030, 0x80000000);
 }
 
@@ -1097,7 +1096,6 @@ nv50_disp_intr_unk20(struct nv50_disp_priv *priv, u32 super)
 		}
 	}
 
-	nv_wr32(priv, 0x610024, 0x00000020);
 	nv_wr32(priv, 0x610030, 0x80000000);
 }
 
@@ -1136,22 +1134,23 @@ nv50_disp_intr_unk40(struct nv50_disp_priv *priv, u32 super)
 		}
 	}
 
-	nv_wr32(priv, 0x610024, 0x00000040);
 	nv_wr32(priv, 0x610030, 0x80000000);
 }
 
-static void
-nv50_disp_intr_super(struct nv50_disp_priv *priv, u32 intr1)
+void
+nv50_disp_intr_supervisor(struct work_struct *work)
 {
+	struct nv50_disp_priv *priv =
+		container_of(work, struct nv50_disp_priv, supervisor);
 	u32 super = nv_rd32(priv, 0x610030);
 
-	nv_debug(priv, "supervisor 0x%08x 0x%08x\n", intr1, super);
+	nv_debug(priv, "supervisor 0x%08x 0x%08x\n", priv->super, super);
 
-	if (intr1 & 0x00000010)
+	if (priv->super & 0x00000010)
 		nv50_disp_intr_unk10(priv, super);
-	if (intr1 & 0x00000020)
+	if (priv->super & 0x00000020)
 		nv50_disp_intr_unk20(priv, super);
-	if (intr1 & 0x00000040)
+	if (priv->super & 0x00000040)
 		nv50_disp_intr_unk40(priv, super);
 }
 
@@ -1180,7 +1179,9 @@ nv50_disp_intr(struct nouveau_subdev *subdev)
 	}
 
 	if (intr1 & 0x00000070) {
-		nv50_disp_intr_super(priv, intr1);
+		priv->super = (intr1 & 0x00000070);
+		schedule_work(&priv->supervisor);
+		nv_wr32(priv, 0x610024, priv->super);
 		intr1 &= ~0x00000070;
 	}
 }
@@ -1202,6 +1203,7 @@ nv50_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nv50_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nv50_disp_intr;
+	INIT_WORK(&priv->supervisor, nv50_disp_intr_supervisor);
 	priv->sclass = nv50_disp_sclass;
 	priv->head.nr = 2;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/core/engine/disp/nv50.h

@@ -15,6 +15,10 @@ struct dcb_output;
 struct nv50_disp_priv {
 	struct nouveau_disp base;
 	struct nouveau_oclass *sclass;
+
+	struct work_struct supervisor;
+	u32 super;
+
 	struct {
 		int nr;
 	} head;
@@ -126,6 +130,7 @@ extern struct nouveau_ofuncs nv50_disp_oimm_ofuncs;
 extern struct nouveau_ofuncs nv50_disp_curs_ofuncs;
 extern struct nouveau_ofuncs nv50_disp_base_ofuncs;
 extern struct nouveau_oclass nv50_disp_cclass;
+void nv50_disp_intr_supervisor(struct work_struct *);
 void nv50_disp_intr(struct nouveau_subdev *);
 
 extern struct nouveau_omthds nv84_disp_base_omthds[];
@@ -139,6 +144,7 @@ extern struct nouveau_ofuncs nvd0_disp_oimm_ofuncs;
 extern struct nouveau_ofuncs nvd0_disp_curs_ofuncs;
 extern struct nouveau_ofuncs nvd0_disp_base_ofuncs;
 extern struct nouveau_oclass nvd0_disp_cclass;
+void nvd0_disp_intr_supervisor(struct work_struct *);
 void nvd0_disp_intr(struct nouveau_subdev *);
 
 #endif

drivers/gpu/drm/nouveau/core/engine/disp/nv84.c

@@ -72,6 +72,7 @@ nv84_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nv84_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nv50_disp_intr;
+	INIT_WORK(&priv->supervisor, nv50_disp_intr_supervisor);
 	priv->sclass = nv84_disp_sclass;
 	priv->head.nr = 2;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/core/engine/disp/nv94.c

@@ -78,6 +78,7 @@ nv94_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nv94_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nv50_disp_intr;
+	INIT_WORK(&priv->supervisor, nv50_disp_intr_supervisor);
 	priv->sclass = nv94_disp_sclass;
 	priv->head.nr = 2;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/core/engine/disp/nva0.c

@@ -62,6 +62,7 @@ nva0_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nva0_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nv50_disp_intr;
+	INIT_WORK(&priv->supervisor, nv50_disp_intr_supervisor);
 	priv->sclass = nva0_disp_sclass;
 	priv->head.nr = 2;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/core/engine/disp/nva3.c

@@ -79,6 +79,7 @@ nva3_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nva3_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nv50_disp_intr;
+	INIT_WORK(&priv->supervisor, nv50_disp_intr_supervisor);
 	priv->sclass = nva3_disp_sclass;
 	priv->head.nr = 2;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c

@@ -835,6 +835,26 @@ nvd0_display_unk4_handler(struct nv50_disp_priv *priv, u32 head, u32 mask)
 	nv_wr32(priv, 0x6101d0, 0x80000000);
 }
 
+void
+nvd0_disp_intr_supervisor(struct work_struct *work)
+{
+	struct nv50_disp_priv *priv =
+		container_of(work, struct nv50_disp_priv, supervisor);
+	u32 mask = 0, head = ~0;
+
+	while (!mask && ++head < priv->head.nr)
+		mask = nv_rd32(priv, 0x6101d4 + (head * 0x800));
+
+	nv_debug(priv, "supervisor %08x %08x %d\n", priv->super, mask, head);
+
+	if (priv->super & 0x00000001)
+		nvd0_display_unk1_handler(priv, head, mask);
+	if (priv->super & 0x00000002)
+		nvd0_display_unk2_handler(priv, head, mask);
+	if (priv->super & 0x00000004)
+		nvd0_display_unk4_handler(priv, head, mask);
+}
+
 void
 nvd0_disp_intr(struct nouveau_subdev *subdev)
 {
@@ -868,27 +888,11 @@ nvd0_disp_intr(struct nouveau_subdev *subdev)
 
 	if (intr & 0x00100000) {
 		u32 stat = nv_rd32(priv, 0x6100ac);
-		u32 mask = 0, crtc = ~0;
-
-		while (!mask && ++crtc < priv->head.nr)
-			mask = nv_rd32(priv, 0x6101d4 + (crtc * 0x800));
-
-		if (stat & 0x00000001) {
-			nv_wr32(priv, 0x6100ac, 0x00000001);
-			nvd0_display_unk1_handler(priv, crtc, mask);
-			stat &= ~0x00000001;
-		}
-
-		if (stat & 0x00000002) {
-			nv_wr32(priv, 0x6100ac, 0x00000002);
-			nvd0_display_unk2_handler(priv, crtc, mask);
-			stat &= ~0x00000002;
-		}
-
-		if (stat & 0x00000004) {
-			nv_wr32(priv, 0x6100ac, 0x00000004);
-			nvd0_display_unk4_handler(priv, crtc, mask);
-			stat &= ~0x00000004;
+		if (stat & 0x00000007) {
+			priv->super = (stat & 0x00000007);
+			schedule_work(&priv->supervisor);
+			nv_wr32(priv, 0x6100ac, priv->super);
+			stat &= ~0x00000007;
 		}
 
 		if (stat) {
@@ -929,6 +933,7 @@ nvd0_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nvd0_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nvd0_disp_intr;
+	INIT_WORK(&priv->supervisor, nvd0_disp_intr_supervisor);
 	priv->sclass = nvd0_disp_sclass;
 	priv->head.nr = heads;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/core/engine/disp/nve0.c

@@ -63,6 +63,7 @@ nve0_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	nv_engine(priv)->sclass = nve0_disp_base_oclass;
 	nv_engine(priv)->cclass = &nv50_disp_cclass;
 	nv_subdev(priv)->intr = nvd0_disp_intr;
+	INIT_WORK(&priv->supervisor, nvd0_disp_intr_supervisor);
 	priv->sclass = nve0_disp_sclass;
 	priv->head.nr = heads;
 	priv->dac.nr = 3;

drivers/gpu/drm/nouveau/nv50_display.c

@@ -424,7 +424,10 @@ evo_kick(u32 *push, void *evoc)
 static bool
 evo_sync_wait(void *data)
 {
-	return nouveau_bo_rd32(data, EVO_MAST_NTFY) != 0x00000000;
+	if (nouveau_bo_rd32(data, EVO_MAST_NTFY) != 0x00000000)
+		return true;
+	usleep_range(1, 2);
+	return false;
 }
 
 static int