In order to be more obvious in fg_alpha / bg_alpha handling during the blending programming drop the default setting for background alpha value and set it explicitly in all cases.
Signed-off-by: Dmitry Baryshkov <[email protected]> --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index d4b545448d74657aafc96e9042c7756654b4f0e7..651159e8731194d75b52c05158bfd1c9bad8b10c 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -335,13 +335,13 @@ static void _dpu_crtc_setup_blend_cfg(struct dpu_crtc_mixer *mixer, max_alpha = 0x3ff; fg_alpha = pstate->base.alpha >> 6; } - bg_alpha = max_alpha - fg_alpha; /* default to opaque blending */ if (pstate->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE || !format->alpha_enable) { blend_op = DPU_BLEND_FG_ALPHA_FG_CONST | DPU_BLEND_BG_ALPHA_BG_CONST; + bg_alpha = max_alpha - fg_alpha; } else if (pstate->base.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI) { blend_op = DPU_BLEND_FG_ALPHA_FG_CONST | DPU_BLEND_BG_ALPHA_FG_PIXEL; @@ -350,6 +350,7 @@ static void _dpu_crtc_setup_blend_cfg(struct dpu_crtc_mixer *mixer, blend_op |= DPU_BLEND_BG_MOD_ALPHA | DPU_BLEND_BG_INV_MOD_ALPHA; } else { + bg_alpha = 0; blend_op |= DPU_BLEND_BG_INV_ALPHA; } } else { @@ -363,6 +364,7 @@ static void _dpu_crtc_setup_blend_cfg(struct dpu_crtc_mixer *mixer, DPU_BLEND_BG_MOD_ALPHA | DPU_BLEND_BG_INV_MOD_ALPHA; } else { + bg_alpha = 0; blend_op |= DPU_BLEND_BG_INV_ALPHA; } } -- 2.47.3
