diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0345-drm-vc4-Check-if-plane-requires-background-fill.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0345-drm-vc4-Check-if-plane-requires-background-fill.patch | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0345-drm-vc4-Check-if-plane-requires-background-fill.patch b/target/linux/brcm2708/patches-4.14/950-0345-drm-vc4-Check-if-plane-requires-background-fill.patch new file mode 100644 index 0000000000..709af646b4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0345-drm-vc4-Check-if-plane-requires-background-fill.patch @@ -0,0 +1,63 @@ +From 7771310ee7e9b7291e549e36771de6176d57e24b Mon Sep 17 00:00:00 2001 +From: Stefan Schake <stschake@gmail.com> +Date: Fri, 9 Mar 2018 01:53:35 +0100 +Subject: [PATCH 345/454] drm/vc4: Check if plane requires background fill + +commit 3d67b68a6a3c2deb689c29759a20150c668c286e upstream. + +Considering a single plane only, we have to enable background color +when the plane has an alpha format and could be blending from the +background or when it doesn't cover the entire screen. + +Changes from v1: + - Drop unrelated change + - Move needs_bg_fill to plane state + +Signed-off-by: Stefan Schake <stschake@gmail.com> +Signed-off-by: Eric Anholt <eric@anholt.net> +Reviewed-by: Eric Anholt <eric@anholt.net> +Link: https://patchwork.freedesktop.org/patch/msgid/1520556817-97297-3-git-send-email-stschake@gmail.com +--- + drivers/gpu/drm/vc4/vc4_plane.c | 17 +++++++++++++++++ + 1 file changed, 17 insertions(+) + +--- 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 + 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; +@@ -704,6 +711,16 @@ static int vc4_plane_mode_set(struct drm + 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 = format->has_alpha || !covers_screen; ++ + return 0; + } + |