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32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
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From c0169f2c197d005aff8acfbc618de6e7f6b1ab94 Mon Sep 17 00:00:00 2001
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From: Florian Wesch <fw@dividuum.de>
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Date: Tue, 5 Mar 2024 15:17:56 +0100
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Subject: [PATCH 1285/1295] vc4/hvs: Fix lbm size calculation for yuv (#6012)
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The code was reducing the number of components by one when we were not
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blending with alpha. But that only makes sense if the components include
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alpha.
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For YUV, we were reducing the number of components for Y from one to zero
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which resulted in no lbm space being allocated.
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Fixes: https://github.com/raspberrypi/linux/issues/5912
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Signed-off-by: Dom Cobley <popcornmix@gmail.com>
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Co-authored-by: Dom Cobley <popcornmix@gmail.com>
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---
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drivers/gpu/drm/vc4/vc4_plane.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/gpu/drm/vc4/vc4_plane.c
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+++ b/drivers/gpu/drm/vc4/vc4_plane.c
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@@ -733,7 +733,7 @@ static unsigned int vc4_lbm_channel_size
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if (!components)
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return 0;
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- if (state->alpha != DRM_BLEND_ALPHA_OPAQUE)
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+ if (state->alpha != DRM_BLEND_ALPHA_OPAQUE && info->has_alpha)
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components -= 1;
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words = width * wpc * components;
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