This is a note to let you know that I've just added the patch titled
drm/meson: Correct OSD1 global alpha value
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-meson-correct-osd1-global-alpha-value.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5d5080263d5f182920bf2568b13531be66805b8a
Author: Stuart Menefy <stuart.menefy@xxxxxxxxxxxxxxxx>
Date: Thu Sep 8 16:51:03 2022 +0100
drm/meson: Correct OSD1 global alpha value
[ 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@xxxxxxxxxxxxxxxx>
Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908155103.686904-1-stuart.menefy@xxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index 8640a8a8a469..44aa52629443 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -168,7 +168,7 @@ 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;
priv->viu.osd1_ctrl_stat2 = readl(priv->io_base +
