diff options
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_planes.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c index 7bc164aa29ee..1a2992f178e5 100644 --- a/drivers/gpu/drm/arm/malidp_planes.c +++ b/drivers/gpu/drm/arm/malidp_planes.c @@ -35,6 +35,9 @@ #define LAYER_COMP_MASK (0x3 << 12) #define LAYER_COMP_PIXEL (0x3 << 12) #define LAYER_COMP_PLANE (0x2 << 12) +#define LAYER_ALPHA_OFFSET (16) +#define LAYER_ALPHA_MASK (0xff) +#define LAYER_ALPHA(x) (((x) & LAYER_ALPHA_MASK) << LAYER_ALPHA_OFFSET) #define MALIDP_LAYER_COMPOSE 0x008 #define MALIDP_LAYER_SIZE 0x00c #define LAYER_H_VAL(x) (((x) & 0x1fff) << 0) @@ -274,6 +277,7 @@ static void malidp_de_plane_update(struct drm_plane *plane, struct malidp_plane_state *ms = to_malidp_plane_state(plane->state); u32 src_w, src_h, dest_w, dest_h, val; int i; + bool format_has_alpha = plane->state->fb->format->has_alpha; mp = to_malidp_plane(plane); @@ -325,12 +329,25 @@ static void malidp_de_plane_update(struct drm_plane *plane, if (plane->state->rotation & DRM_MODE_REFLECT_Y) val |= LAYER_V_FLIP; - /* - * always enable pixel alpha blending until we have a way to change - * blend modes - */ val &= ~LAYER_COMP_MASK; - val |= LAYER_COMP_PIXEL; + if (format_has_alpha) { + + /* + * always enable pixel alpha blending until we have a way + * to change blend modes + */ + val |= LAYER_COMP_PIXEL; + } else { + + /* + * do not enable pixel alpha blending as the color channel + * does not have any alpha information + */ + val |= LAYER_COMP_PLANE; + + /* Set layer alpha coefficient to 0xff ie fully opaque */ + val |= LAYER_ALPHA(0xff); + } val &= ~LAYER_FLOWCFG(LAYER_FLOWCFG_MASK); if (plane->state->crtc) { |