drm/mediatek: Plumb supported rotation values from components to plane init

This patch adds the ability for components to expose supported rotations
which will be exposed to userspace via a plane rotation property.

No functional changes in this patch.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

drivers/gpu/drm/mediatek/mtk_drm_crtc.c

@@ -600,13 +600,15 @@ static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
 					 int comp_idx, int pipe)
 {
 	int num_planes = mtk_drm_crtc_num_comp_planes(mtk_crtc, comp_idx);
+	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[comp_idx];
 	int i, ret;
 
 	for (i = 0; i < num_planes; i++) {
 		ret = mtk_plane_init(drm_dev,
 				&mtk_crtc->planes[mtk_crtc->layer_nr],
 				BIT(pipe),
-				mtk_drm_crtc_plane_type(mtk_crtc->layer_nr));
+				mtk_drm_crtc_plane_type(mtk_crtc->layer_nr),
+				mtk_ddp_comp_supported_rotations(comp));
 		if (ret)
 			return ret;
 

drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h

@@ -77,6 +77,7 @@ struct mtk_ddp_comp_funcs {
 	void (*stop)(struct mtk_ddp_comp *comp);
 	void (*enable_vblank)(struct mtk_ddp_comp *comp, struct drm_crtc *crtc);
 	void (*disable_vblank)(struct mtk_ddp_comp *comp);
+	unsigned int (*supported_rotations)(struct mtk_ddp_comp *comp);
 	unsigned int (*layer_nr)(struct mtk_ddp_comp *comp);
 	void (*layer_on)(struct mtk_ddp_comp *comp, unsigned int idx);
 	void (*layer_off)(struct mtk_ddp_comp *comp, unsigned int idx);
@@ -133,6 +134,15 @@ static inline void mtk_ddp_comp_disable_vblank(struct mtk_ddp_comp *comp)
 		comp->funcs->disable_vblank(comp);
 }
 
+static inline
+unsigned int mtk_ddp_comp_supported_rotations(struct mtk_ddp_comp *comp)
+{
+	if (comp->funcs && comp->funcs->supported_rotations)
+		return comp->funcs->supported_rotations(comp);
+
+	return 0;
+}
+
 static inline unsigned int mtk_ddp_comp_layer_nr(struct mtk_ddp_comp *comp)
 {
 	if (comp->funcs && comp->funcs->layer_nr)

drivers/gpu/drm/mediatek/mtk_drm_plane.c

@@ -144,6 +144,7 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
 	state->pending.y = plane->state->dst.y1;
 	state->pending.width = drm_rect_width(&plane->state->dst);
 	state->pending.height = drm_rect_height(&plane->state->dst);
+	state->pending.rotation = plane->state->rotation;
 	wmb(); /* Make sure the above parameters are set before update */
 	state->pending.dirty = true;
 }
@@ -166,7 +167,8 @@ static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 };
 
 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
-		   unsigned long possible_crtcs, enum drm_plane_type type)
+		   unsigned long possible_crtcs, enum drm_plane_type type,
+		   unsigned int supported_rotations)
 {
 	int err;
 
@@ -178,6 +180,14 @@ int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 		return err;
 	}
 
+	if (supported_rotations & ~DRM_MODE_ROTATE_0) {
+		err = drm_plane_create_rotation_property(plane,
+							 DRM_MODE_ROTATE_0,
+							 supported_rotations);
+		if (err)
+			DRM_INFO("Create rotation property failed\n");
+	}
+
 	drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 
 	return 0;

drivers/gpu/drm/mediatek/mtk_drm_plane.h

@@ -20,6 +20,7 @@ struct mtk_plane_pending_state {
 	unsigned int			y;
 	unsigned int			width;
 	unsigned int			height;
+	unsigned int			rotation;
 	bool				dirty;
 };
 
@@ -35,6 +36,7 @@ to_mtk_plane_state(struct drm_plane_state *state)
 }
 
 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
-		   unsigned long possible_crtcs, enum drm_plane_type type);
+		   unsigned long possible_crtcs, enum drm_plane_type type,
+		   unsigned int supported_rotations);
 
 #endif