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drm/meson: Correct OSD1 global alpha value

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[ Upstream commit 6836829c8ea453c9e3e518e61539e35881c8ed5f ]

VIU_OSD1_CTRL_STAT.GLOBAL_ALPHA is a 9 bit field, so the maximum
value is 0x100 not 0xff.

This matches the vendor kernel.

Signed-off-by: Stuart Menefy <stuart.menefy@mathembedded.com>
Fixes: bbbe775ec5 ("drm: Add support for Amlogic Meson Graphic Controller")
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908155103.686904-1-stuart.menefy@mathembedded.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Stuart Menefy 2022-09-08 16:51:03 +01:00 committed by Greg Kroah-Hartman
parent 694fc76bfe
commit 63408525dc
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/meson/meson_plane.c
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@ -101,7 +101,7 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
/* Enable OSD and BLK0, set max global alpha */
priv->viu.osd1_ctrl_stat = OSD_ENABLE |
(0xFF << OSD_GLOBAL_ALPHA_SHIFT) |
(0x100 << OSD_GLOBAL_ALPHA_SHIFT) |
OSD_BLK0_ENABLE;
/* Set up BLK0 to point to the right canvas */