[PATCH] drm: allow changing DPMS mode for non-CRTC displays

[Marta Lofstedt]

For non-CRTC displays, the drm_atomic_helper_connector_dpms
will always set the connector back the old DPMS state
before returning. This makes it impossible to change
DPMS state.

fixes: 0853695c3ba46f97dfc0b5885f7b7e640ca212dd

Signed-off-by: Marta Lofstedt <marta.lofstedt at intel.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c 
b/drivers/gpu/drm/drm_atomic_helper.c
index 494680c..6a5acb9 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2885,8 +2885,8 @@ int drm_atomic_helper_connector_dpms(struct drm_connector 
*connector,
 fail:
        if (ret == -EDEADLK)
                goto backoff;
-
-       connector->dpms = old_mode;
+       if (ret != 0)
+               connector->dpms = old_mode;
        drm_atomic_state_put(state);
        return ret;

-- 
2.9.3