linux-kernel - [PATCH] drm/meson: Add zpos immutable property to planes

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Message-Id: <20190429075247.7946-1-narmstrong@baylibre.com>
Date:   Mon, 29 Apr 2019 09:52:47 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/meson: Add zpos immutable property to planes

Add immutable zpos property to primary and overlay planes to specify
the current fixed zpos position.

Fixes: f9a2348196d1 ("drm/meson: Support Overlay plane for video rendering")
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/gpu/drm/meson/meson_overlay.c | 3 +++
 drivers/gpu/drm/meson/meson_plane.c   | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index bdbf925ff3e8..dceb3df5e652 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -578,6 +578,9 @@ int meson_overlay_create(struct meson_drm *priv)
 
 	drm_plane_helper_add(plane, &meson_overlay_helper_funcs);
 
+	/* For now, VD Overlay plane is always on the back */
+	drm_plane_create_zpos_immutable_property(plane, 0);
+
 	priv->overlay_plane = plane;
 
 	DRM_DEBUG_DRIVER("\n");
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index b8f6b08a89a6..2f7f4dfce45b 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -399,6 +399,9 @@ int meson_plane_create(struct meson_drm *priv)
 
 	drm_plane_helper_add(plane, &meson_plane_helper_funcs);
 
+	/* For now, OSD Primary plane is always on the front */
+	drm_plane_create_zpos_immutable_property(plane, 1);
+
 	priv->primary_plane = plane;
 
 	return 0;
-- 
2.21.0