From: Kristian H. Kristensen Date: Wed, 18 Apr 2018 17:31:52 +0000 (-0700) Subject: drm/rockchip: Disable blending for win0 X-Git-Tag: android-x86-8.1-r1~365^2~45^2~142 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=58badaa7783dc341daa1586235823fff94d3f96a;p=android-x86%2Fkernel.git drm/rockchip: Disable blending for win0 Blending win0 with the background color doesn't seem to work correctly. We only get the background color, no matter the contents of the win0 framebuffer. However, blending pre-multiplied color with the default opaque black default background color is a no-op, so we can just disable blending to get the correct result. Signed-off-by: Kristian H. Kristensen Cc: Sandy Huang Cc: Sean Paul Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20180418173152.93246-1-hoegsberg@chromium.org --- diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index fe3faa7c38d9..2121345a61af 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -76,6 +76,9 @@ #define VOP_WIN_GET_YRGBADDR(vop, win) \ vop_readl(vop, win->base + win->phy->yrgb_mst.offset) +#define VOP_WIN_TO_INDEX(vop_win) \ + ((vop_win) - (vop_win)->vop->win) + #define to_vop(x) container_of(x, struct vop, crtc) #define to_vop_win(x) container_of(x, struct vop_win, base) @@ -708,6 +711,7 @@ static void vop_plane_atomic_update(struct drm_plane *plane, dma_addr_t dma_addr; uint32_t val; bool rb_swap; + int win_index = VOP_WIN_TO_INDEX(vop_win); int format; /* @@ -777,7 +781,14 @@ static void vop_plane_atomic_update(struct drm_plane *plane, rb_swap = has_rb_swapped(fb->format->format); VOP_WIN_SET(vop, win, rb_swap, rb_swap); - if (fb->format->has_alpha) { + /* + * Blending win0 with the background color doesn't seem to work + * correctly. We only get the background color, no matter the contents + * of the win0 framebuffer. However, blending pre-multiplied color + * with the default opaque black default background color is a no-op, + * so we can just disable blending to get the correct result. + */ + if (fb->format->has_alpha && win_index > 0) { VOP_WIN_SET(vop, win, dst_alpha_ctl, DST_FACTOR_M0(ALPHA_SRC_INVERSE)); val = SRC_ALPHA_EN(1) | SRC_COLOR_M0(ALPHA_SRC_PRE_MUL) |