This is a note to let you know that I've just added the patch titled drm/meson: fix 1px pink line on GXM when scaling video overlay to the 6.2-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-fix-1px-pink-line-on-gxm-when-scaling-vide.patch and it can be found in the queue-6.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit d48b5f4010a78ceaf33a6c06cde7010f56f9e352 Author: Christian Hewitt <christianshewitt@xxxxxxxxx> Date: Fri Mar 3 12:33:12 2023 +0000 drm/meson: fix 1px pink line on GXM when scaling video overlay [ Upstream commit 5c8cf1664f288098a971a1d1e65716a2b6a279e1 ] Playing media with a resolution smaller than the crtc size requires the video overlay to be scaled for output and GXM boards display a 1px pink line on the bottom of the scaled overlay. Comparing with the downstream vendor driver revealed VPP_DUMMY_DATA not being set [0]. Setting VPP_DUMMY_DATA prevents the 1px pink line from being seen. [0] https://github.com/endlessm/linux-s905x/blob/master/drivers/amlogic/amports/video.c#L7869 Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller") Suggested-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> Signed-off-by: Christian Hewitt <christianshewitt@xxxxxxxxx> Acked-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20230303123312.155164-1-christianshewitt@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/meson/meson_vpp.c b/drivers/gpu/drm/meson/meson_vpp.c index 154837688ab0d..5df1957c8e41f 100644 --- a/drivers/gpu/drm/meson/meson_vpp.c +++ b/drivers/gpu/drm/meson/meson_vpp.c @@ -100,6 +100,8 @@ void meson_vpp_init(struct meson_drm *priv) priv->io_base + _REG(VPP_DOLBY_CTRL)); writel_relaxed(0x1020080, priv->io_base + _REG(VPP_DUMMY_DATA1)); + writel_relaxed(0x42020, + priv->io_base + _REG(VPP_DUMMY_DATA)); } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) writel_relaxed(0xf, priv->io_base + _REG(DOLBY_PATH_CTRL));