[PATCH 2/2] drm/imx: ipuv3-plane: support underlay plane
From: Michael Tretter <m.tretter@pengutronix.de>
Date: 2026-02-16 12:45:00
Also in:
dri-devel, imx
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for freescale imx 5/6, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Philipp Zabel, Linus Torvalds
The IPUv3 overlay plane may be placed over or under the primary plane. Use an immutable position of 1 for the primary plane and a mutable position including 0 and 2 for the overlay plane, to allow placing the overlay plane over and under the primary plane. Signed-off-by: Michael Tretter <m.tretter@pengutronix.de> --- drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
index dfd036f3195e..ddad5ea92aad 100644
--- a/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c@@ -890,7 +890,7 @@ struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu, { struct ipu_plane *ipu_plane; const uint64_t *modifiers = ipu_format_modifiers; - unsigned int zpos = (type == DRM_PLANE_TYPE_PRIMARY) ? 0 : 1; + unsigned int primary_zpos = 1; unsigned int format_count; const uint32_t *formats; int ret;
@@ -928,12 +928,14 @@ struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu, else drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs); - if (dp == IPU_DP_FLOW_SYNC_BG || dp == IPU_DP_FLOW_SYNC_FG) - ret = drm_plane_create_zpos_property(&ipu_plane->base, zpos, 0, - 1); + if ((dp == IPU_DP_FLOW_SYNC_BG || dp == IPU_DP_FLOW_SYNC_FG) && + type != DRM_PLANE_TYPE_PRIMARY) + ret = drm_plane_create_zpos_property(&ipu_plane->base, + primary_zpos + 1, 0, + primary_zpos + 1); else ret = drm_plane_create_zpos_immutable_property(&ipu_plane->base, - 0); + primary_zpos); if (ret) return ERR_PTR(ret);
--
2.47.3