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drm/vkms: fix xrgb on compute crc

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[ Upstream commit 0986191186128b10b6bbfa5220fc587ed5725e49 ]

The previous memset operation was not correctly zeroing the alpha
channel to compute the crc, and as a result, the IGT subtest
kms_cursor_crc/pipe-A-cursor-alpha-transparent fails.

Fixes: db7f419c06d7c ("drm/vkms: Compute CRC with Cursor Plane")

Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200730202524.5upzuh4irboru7my@smtp.gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Melissa Wen 2020-07-30 17:25:24 -03:00 committed by Greg Kroah-Hartman
parent 0ae399b5da
commit e99958ec09
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/vkms/vkms_composer.c
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@ -33,7 +33,7 @@ static uint32_t compute_crc(void *vaddr_out, struct vkms_composer *composer)
+ (i * composer->pitch)
+ (j * composer->cpp);
/* XRGB format ignores Alpha channel */
memset(vaddr_out + src_offset + 24, 0, 8);
bitmap_clear(vaddr_out + src_offset, 24, 8);
crc = crc32_le(crc, vaddr_out + src_offset,
sizeof(u32));
}