From f009cbcd26dddb1b567fcba9fee79005afac1517 Mon Sep 17 00:00:00 2001
From: Stuart Menefy <stuart.menefy@mathembedded.com>
Date: Thu, 8 Sep 2022 16:51:03 +0100
Subject: drm/meson: Correct OSD1 global alpha value
Git-commit: 6836829c8ea453c9e3e518e61539e35881c8ed5f
Patch-mainline: v6.0-rc6
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
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: bbbe775ec5b5 ("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
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/meson/meson_plane.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index b9ac932af8d0..03acc68abf2c 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -170,7 +170,7 @@ 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 +
--
2.38.1