While the omap_plane_init() function calls drm_plane_create_zpos_property() with an initial value of 0, omap_plane_reset() will force it to another value depending on the plane type.
Fix the discrepancy by setting the initial zpos value to the same value in the drm_plane_create_zpos_property() call.
Reviewed-by: Tomi Valkeinen tomba@kernel.org Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/omapdrm/omap_plane.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c index b35205c4e979..e67baf9a942c 100644 --- a/drivers/gpu/drm/omapdrm/omap_plane.c +++ b/drivers/gpu/drm/omapdrm/omap_plane.c @@ -533,6 +533,7 @@ struct drm_plane *omap_plane_init(struct drm_device *dev, unsigned int num_planes = dispc_get_num_ovls(priv->dispc); struct drm_plane *plane; struct omap_plane *omap_plane; + unsigned int zpos; int ret; u32 nformats; const u32 *formats; @@ -564,7 +565,16 @@ struct drm_plane *omap_plane_init(struct drm_device *dev, drm_plane_helper_add(plane, &omap_plane_helper_funcs);
omap_plane_install_properties(plane, &plane->base); - drm_plane_create_zpos_property(plane, 0, 0, num_planes - 1); + + /* + * Set the zpos default depending on whether we are a primary or overlay + * plane. + */ + if (plane->type == DRM_PLANE_TYPE_PRIMARY) + zpos = 0; + else + zpos = omap_plane->id; + drm_plane_create_zpos_property(plane, zpos, 0, num_planes - 1); drm_plane_create_alpha_property(plane); drm_plane_create_blend_mode_property(plane, BIT(DRM_MODE_BLEND_PREMULTI) | BIT(DRM_MODE_BLEND_COVERAGE));