[PATCH] drm/tegra: Add blend mode properties

[Thierry Reding <thierry.reding@kernel.org>]

From: Thierry Reding <treding@nvidia.com>

The default programming in the driver matches the "coverage" blend mode,
so add the corresponding pixel blend mode property to let userspace know
about it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/tegra/dc.c  | 6 ++++++
 drivers/gpu/drm/tegra/hub.c | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 0b3fcc7011b35..fefc3761a4bc7 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -904,6 +904,7 @@ static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
 						    struct tegra_dc *dc)
 {
 	unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
+	unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
 	enum drm_plane_type type = DRM_PLANE_TYPE_PRIMARY;
 	struct tegra_plane *plane;
 	unsigned int num_formats;
@@ -939,6 +940,7 @@ static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
 	}
 
 	drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
+	drm_plane_create_blend_mode_property(&plane->base, blend_caps);
 	drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
 
 	err = drm_plane_create_rotation_property(&plane->base,
@@ -1209,6 +1211,7 @@ static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
 						      struct tegra_dc *dc)
 {
 	unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
+	unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
 	struct tegra_plane *plane;
 	unsigned int num_formats;
 	const u32 *formats;
@@ -1252,6 +1255,7 @@ static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
 	}
 
 	drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs);
+	drm_plane_create_blend_mode_property(&plane->base, blend_caps);
 	drm_plane_create_zpos_immutable_property(&plane->base, 255);
 
 	return &plane->base;
@@ -1356,6 +1360,7 @@ static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
 						       bool cursor)
 {
 	unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
+	unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
 	struct tegra_plane *plane;
 	unsigned int num_formats;
 	enum drm_plane_type type;
@@ -1394,6 +1399,7 @@ static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
 	}
 
 	drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
+	drm_plane_create_blend_mode_property(&plane->base, blend_caps);
 	drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
 
 	err = drm_plane_create_rotation_property(&plane->base,
diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index bd442bfd45407..448f49f3a7d7e 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -759,6 +759,7 @@ struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
 					    unsigned int index,
 					    enum drm_plane_type type)
 {
+	unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
 	struct tegra_drm *tegra = drm->dev_private;
 	struct tegra_display_hub *hub = tegra->hub;
 	struct tegra_shared_plane *plane;
@@ -797,6 +798,7 @@ struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
 	}
 
 	drm_plane_helper_add(p, &tegra_shared_plane_helper_funcs);
+	drm_plane_create_blend_mode_property(p, blend_caps);
 	drm_plane_create_zpos_property(p, 0, 0, 255);
 
 	return p;
-- 
2.55.0