The plane's opacity should be reseted while the plane
is disabled. It prevents from seeing a possible global
or layer background color set earlier.
Signed-off-by: Yannick Fertre <yannick.fer...@foss.st.com>
---
drivers/gpu/drm/stm/ltdc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 5576fdae4962..cb4f08673a64 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -1514,6 +1514,9 @@ static void ltdc_plane_atomic_disable(struct drm_plane
*plane,
/* Disable layer */
regmap_write_bits(ldev->regmap, LTDC_L1CR + lofs, LXCR_LEN |
LXCR_CLUTEN | LXCR_HMEN, 0);
+ /* Reset the layer transparency to hide any related background color */
+ regmap_write_bits(ldev->regmap, LTDC_L1CACR + lofs, LXCACR_CONSTA,
0x00);
+
/* Commit shadow registers = update plane at next vblank */
if (ldev->caps.plane_reg_shadow)
regmap_write_bits(ldev->regmap, LTDC_L1RCR + lofs,
--
2.34.1
