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| author | Jernej Skrabec <jernej.skrabec@gmail.com> | 2026-08-03 18:10:41 +0200 |
|---|---|---|
| committer | Chen-Yu Tsai <wens@kernel.org> | 2026-08-06 14:22:50 +0800 |
| commit | 583d99165a85c3aaee924078c0f03c72e25644ac (patch) | |
| tree | 13faf9e487ddd44c1b4ea016b672dcc47407b872 /tools/perf/scripts/python/netdev-times.py | |
| parent | 5c31990b21f0b535732deb2b658b78b07464f56c (diff) | |
drm/sun4i: vi scaler: Restore opaque alpha in video modes
The DE3 mixer initialization clears the entire mixer register space. This
also clears VSU_GLOBAL_ALPHA, despite its hardware reset value being 0xff.
The VI scaler uses Video Normal mode for subsampled YUV formats. In this
mode, VSU_GLOBAL_ALPHA provides the scaler output alpha. Leaving the
register at zero causes the scaler to produce fully transparent output.
Set VSU_GLOBAL_ALPHA to 0xff whenever configuring a DE3 or newer VI
scaler. The register is ignored in UI scaling mode.
Fixes: c50519e6db4d ("drm/sun4i: Add basic support for DE3")
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Chen-Yu Tsai <wens@kernel.org>
Link: https://patch.msgid.link/c48ba85b9e4478d51afde4f36839fd1c1d363b23.1785772659.git.jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions