From: Yannick Fertre <yannick.fer...@foss.st.com> [ Upstream commit 02fa62d41c8abff945bae5bfc3ddcf4721496aca ]
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> Link: https://patchwork.freedesktop.org/patch/msgid/20240712131344.98113-1-yannick.fer...@foss.st.com Signed-off-by: Raphael Gallais-Pou <raphael.gallais-...@foss.st.com> Signed-off-by: Sasha Levin <sas...@kernel.org> --- 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 eeaabb4e10d3e..9e76785cb2691 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -1513,6 +1513,9 @@ 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, -- 2.43.0
