diff options
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_plane.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c index 831e1959e64d..8be9a876fa17 100644 --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -73,6 +73,12 @@ struct vc4_plane_state { /* Our allocation in LBM for temporary storage during scaling. */ struct drm_mm_node lbm; + + /* Set when the plane has per-pixel alpha content or does not cover + * the entire screen. This is a hint to the CRTC that it might need + * to enable background color fill. + */ + bool needs_bg_fill; }; static inline struct vc4_plane_state * @@ -521,6 +527,7 @@ static int vc4_plane_mode_set(struct drm_plane *plane, u32 ctl0_offset = vc4_state->dlist_count; const struct hvs_format *format = vc4_get_hvs_format(fb->format->format); int num_planes = drm_format_num_planes(format->drm); + bool covers_screen; u32 scl0, scl1, pitch0; u32 lbm_size, tiling; unsigned long irqflags; @@ -701,6 +708,16 @@ static int vc4_plane_mode_set(struct drm_plane *plane, vc4_state->dlist[ctl0_offset] |= VC4_SET_FIELD(vc4_state->dlist_count, SCALER_CTL0_SIZE); + /* crtc_* are already clipped coordinates. */ + covers_screen = vc4_state->crtc_x == 0 && vc4_state->crtc_y == 0 && + vc4_state->crtc_w == state->crtc->mode.hdisplay && + vc4_state->crtc_h == state->crtc->mode.vdisplay; + /* Background fill might be necessary when the plane has per-pixel + * alpha content and blends from the background or does not cover + * the entire screen. + */ + vc4_state->needs_bg_fill = fb->format->has_alpha || !covers_screen; + return 0; } |