drm/nouveau/kms/gv100-: add support for plane zpos property

Has a nice side-effect that we only update HW for this when it changes now,
rather than every time we do a page flip.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/dispnv50/atom.h

@@ -221,6 +221,10 @@ struct nv50_wndw_atom {
 		u16 y;
 	} point;
 
+	struct {
+		u8 depth;
+	} blend;
+
 	union nv50_wndw_atom_mask {
 		struct {
 			bool ntfy:1;
@@ -230,6 +234,7 @@ struct nv50_wndw_atom {
 			bool image:1;
 			bool scale:1;
 			bool point:1;
+			bool blend:1;
 		};
 		u8 mask;
 	} set, clr;

drivers/gpu/drm/nouveau/dispnv50/wndw.c

@@ -150,6 +150,7 @@ nv50_wndw_flush_set(struct nv50_wndw *wndw, u32 *interlock,
 
 	if (asyw->set.csc  ) wndw->func->csc_set  (wndw, asyw);
 	if (asyw->set.scale) wndw->func->scale_set(wndw, asyw);
+	if (asyw->set.blend) wndw->func->blend_set(wndw, asyw);
 	if (asyw->set.point) {
 		if (asyw->set.point = false, asyw->set.mask)
 			interlock[wndw->interlock.type] |= wndw->interlock.data;
@@ -285,6 +286,12 @@ nv50_wndw_atomic_check_acquire(struct nv50_wndw *wndw, bool modeset,
 			asyw->set.scale = true;
 	}
 
+	if (wndw->func->blend_set) {
+		asyw->blend.depth = 255 - asyw->state.normalized_zpos;
+		if (memcmp(&armw->blend, &asyw->blend, sizeof(asyw->blend)))
+			asyw->set.blend = true;
+	}
+
 	if (wndw->immd) {
 		asyw->point.x = asyw->state.crtc_x;
 		asyw->point.y = asyw->state.crtc_y;
@@ -644,7 +651,12 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
 
 	wndw->notify.func = nv50_wndw_notify;
 
-	if (1) {
+	if (wndw->func->blend_set) {
+		ret = drm_plane_create_zpos_property(&wndw->plane,
+				nv50_wndw_zpos_default(&wndw->plane), 0, 254);
+		if (ret)
+			return ret;
+	} else {
 		ret = drm_plane_create_zpos_immutable_property(&wndw->plane,
 				nv50_wndw_zpos_default(&wndw->plane));
 		if (ret)

drivers/gpu/drm/nouveau/dispnv50/wndw.h

@@ -76,6 +76,7 @@ struct nv50_wndw_func {
 	void (*image_set)(struct nv50_wndw *, struct nv50_wndw_atom *);
 	void (*image_clr)(struct nv50_wndw *);
 	void (*scale_set)(struct nv50_wndw *, struct nv50_wndw_atom *);
+	void (*blend_set)(struct nv50_wndw *, struct nv50_wndw_atom *);
 
 	void (*update)(struct nv50_wndw *, u32 *interlock);
 };
@@ -110,6 +111,7 @@ void wndwc37e_sema_clr(struct nv50_wndw *);
 void wndwc37e_ntfy_set(struct nv50_wndw *, struct nv50_wndw_atom *);
 void wndwc37e_ntfy_clr(struct nv50_wndw *);
 void wndwc37e_image_clr(struct nv50_wndw *);
+void wndwc37e_blend_set(struct nv50_wndw *, struct nv50_wndw_atom *);
 void wndwc37e_update(struct nv50_wndw *, u32 *);
 
 int wndwc57e_new(struct nouveau_drm *, enum drm_plane_type, int, s32,

drivers/gpu/drm/nouveau/dispnv50/wndwc37e.c

@@ -81,6 +81,23 @@ wndwc37e_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
 	asyw->xlut.i.load = head907d_olut_load;
 }
 
+void
+wndwc37e_blend_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
+{
+	u32 *push;
+	if ((push = evo_wait(&wndw->wndw, 8))) {
+		evo_mthd(push, 0x02ec, 7);
+		evo_data(push, asyw->blend.depth << 4);
+		evo_data(push, 0x000000ff);
+		evo_data(push, 0x00007722);
+		evo_data(push, 0xffff0000);
+		evo_data(push, 0xffff0000);
+		evo_data(push, 0xffff0000);
+		evo_data(push, 0xffff0000);
+		evo_kick(push, &wndw->wndw);
+	}
+}
+
 void
 wndwc37e_image_clr(struct nv50_wndw *wndw)
 {
@@ -99,7 +116,7 @@ wndwc37e_image_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
 {
 	u32 *push;
 
-	if (!(push = evo_wait(&wndw->wndw, 25)))
+	if (!(push = evo_wait(&wndw->wndw, 17)))
 		return;
 
 	evo_mthd(push, 0x0308, 1);
@@ -124,16 +141,6 @@ wndwc37e_image_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
 	evo_mthd(push, 0x02a4, 1);
 	evo_data(push, asyw->state.crtc_h << 16 |
 		       asyw->state.crtc_w);
-
-	/*XXX: Composition-related stuff.  Need to implement properly. */
-	evo_mthd(push, 0x02ec, 7);
-	evo_data(push, (2 - (wndw->id & 1)) << 4);
-	evo_data(push, 0x000000ff);
-	evo_data(push, 0x00007722);
-	evo_data(push, 0xffff0000);
-	evo_data(push, 0xffff0000);
-	evo_data(push, 0xffff0000);
-	evo_data(push, 0xffff0000);
 	evo_kick(push, &wndw->wndw);
 }
 
@@ -258,6 +265,7 @@ wndwc37e = {
 	.csc_clr = wndwc37e_csc_clr,
 	.image_set = wndwc37e_image_set,
 	.image_clr = wndwc37e_image_clr,
+	.blend_set = wndwc37e_blend_set,
 	.update = wndwc37e_update,
 };
 

drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c

@@ -190,6 +190,7 @@ wndwc57e = {
 	.csc_clr = wndwc57e_csc_clr,
 	.image_set = wndwc57e_image_set,
 	.image_clr = wndwc37e_image_clr,
+	.blend_set = wndwc37e_blend_set,
 	.update = wndwc37e_update,
 };