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sun8i alpha-related issues #1

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rsglobal opened this issue Jun 2, 2022 · 1 comment
Open

sun8i alpha-related issues #1

rsglobal opened this issue Jun 2, 2022 · 1 comment

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@rsglobal
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rsglobal commented Jun 2, 2022 •
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  1. Most bottom layer alpha doesn't work
    Test source code: Link
alpha_most_bottom_broken.mp4
  1. Multi-stage blending result is invalid
    Test source code: Link
alpha_overlap_broken.mp4
@rsglobal
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rsglobal commented Jun 2, 2022 •
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After output premultiplication enabled:
https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/

  1. Most bottom layer alpha doesn't work (fixed)
alpha_most_bottom_fixed.mp4
  1. Multi-stage blending result is invalid (fixed)
alpha_overlapping_fixed.mp4

intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this issue Jun 2, 2022
@rsglobal @intel-lab-lkp
drm/sun4i: Enable output signal premultiplication for DE2/DE3
fd85750 
Otherwise alpha value is discarded, resulting incorrect pixel
apperance on the display.

This also fixes missing transparency for the most bottom layer.

Test applications and videos w/ w/o this patch are available at [1].

[1]: GloDroid/glodroid_tests#1
Signed-off-by: Roman Stratiienko <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this issue Jun 5, 2022
@rsglobal @intel-lab-lkp
drm/sun4i: Enable output signal premultiplication for DE2/DE3
8eec0dd 
Otherwise alpha value is discarded, resulting incorrect pixel
apperance on the display.

This also fixes missing transparency for the most bottom layer.

Test applications and videos w/ w/o this patch are available at [1].

[1]: GloDroid/glodroid_tests#1
Signed-off-by: Roman Stratiienko <[email protected]>
rsglobal added a commit to GloDroid/glodroid_forks that referenced this issue Jun 10, 2022
@rsglobal
drm/sun4i: Enable output signal premultiplication for DE2/DE3
566b20b 
Otherwise alpha value is discarded, resulting incorrect pixel
apperance on the display.

This also fixes missing transparency for the most bottom layer.

Test applications and videos w/ w/o this patch are available at [1].

[1]: GloDroid/glodroid_tests#1
Signed-off-by: Roman Stratiienko <[email protected]>

---
Changelog:

V2: Added code hunk missing in v1
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@rsglobal