Fall back to legacy drm_helper_connector_dpms() call back in drm_atomic_helper_connector_dpms() if DRIVER_ATOMIC feature is not present.
Calling drm_atomic_helper_connector_dpms() from non atomic driver causes undefined behavior. This is a problem with componentized encoder/connector drivers that may be bound to both atomic and non atomic drivers. Signed-off-by: Jyri Sarha <jsarha at ti.com> --- This is just an alternative to this: https://lists.freedesktop.org/archives/dri-devel/2016-January/098867.html Either one of the patches should be taken for Beaglebone-black, or any other non atomic driver using tda998x, to work. drivers/gpu/drm/drm_atomic_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 57cccd6..6ad0303 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -2344,6 +2344,9 @@ int drm_atomic_helper_connector_dpms(struct drm_connector *connector, bool active = false; int old_mode = connector->dpms; + if (!drm_core_check_feature(connector->dev, DRIVER_ATOMIC)) + return drm_helper_connector_dpms(connector, mode); + if (mode != DRM_MODE_DPMS_ON) mode = DRM_MODE_DPMS_OFF; -- 1.9.1
