R-Car DU supports different blend modes via VSP1. Add DRM blend mode
supports to make it configurable.
As drm_plane_create_blend_mode_property() creates the blend mode
property with the default value of DRM_MODE_BLEND_PREMULTI, it changes
the default blending behavior on R-Car DU. The rcar-du's blend mode was
same as DRM_MODE_BLEND_COVERAGE, i.e., pixel color values have not been
pre-multitplied.
Signed-off-by: Takanari Hayama <taki@xxxxxxxxxx>
---
drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index 8eb9b2b097ae..283327046aa5 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -170,6 +170,18 @@ static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
format = rcar_du_format_info(state->format->fourcc);
cfg.pixelformat = format->v4l2;
+ switch (state->state.pixel_blend_mode) {
+ case DRM_MODE_BLEND_PREMULTI:
+ cfg.blend_mode = VSP1_DU_BLEND_MODE_PREMULTI;
+ break;
+ case DRM_MODE_BLEND_COVERAGE:
+ cfg.blend_mode = VSP1_DU_BLEND_MODE_COVERAGE;
+ break;
+ case DRM_MODE_BLEND_PIXEL_NONE:
+ cfg.blend_mode = VSP1_DU_BLEND_MODE_PIXEL_NONE;
+ break;
+ }
+
vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
plane->index, &cfg);
}
@@ -444,6 +456,11 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
num_planes - 1);
}
+ drm_plane_create_blend_mode_property(&plane->plane,
+ BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+ BIT(DRM_MODE_BLEND_PREMULTI) |
+ BIT(DRM_MODE_BLEND_COVERAGE));
+
vsp->num_planes++;
}
--
2.25.1
