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Subject[PATCH] drm/omap: Add 'alpha' and 'pixel blend mode' plane properties
Date
Add the following properties for planes:
* alpha
* pixel blend mode. Only "Pre-multiplied" and "Coverage" are supported

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
---
drivers/gpu/drm/omapdrm/omap_plane.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
index 84e1be981cfe..73ec99819a3d 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -53,8 +53,12 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
memset(&info, 0, sizeof(info));
info.rotation_type = OMAP_DSS_ROT_NONE;
info.rotation = DRM_MODE_ROTATE_0;
- info.global_alpha = 0xff;
+ info.global_alpha = state->alpha >> 8;
info.zorder = state->normalized_zpos;
+ if (state->pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
+ info.pre_mult_alpha = 1;
+ else
+ info.pre_mult_alpha = 0;

/* update scanout: */
omap_framebuffer_update_scanout(state->fb, state, &info);
@@ -285,6 +289,9 @@ struct drm_plane *omap_plane_init(struct drm_device *dev,

omap_plane_install_properties(plane, &plane->base);
drm_plane_create_zpos_property(plane, 0, 0, num_planes - 1);
+ drm_plane_create_alpha_property(plane);
+ drm_plane_create_blend_mode_property(plane, BIT(DRM_MODE_BLEND_PREMULTI) |
+ BIT(DRM_MODE_BLEND_COVERAGE));

return plane;

--
2.17.1
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