[PATCH] drm: atomic: fix legacy gamma set helper

[Lionel Landwerlin]

Color management properties are a bit of an odd use case because
they're not marked as atomic properties. Currently we're not updating
the non atomic values so the drm_crtc_state is out of sync with the
values stored in the crtc object.

v2: Update non atomic values only if commit succeeds (Bob Paauwe)

v3: Do not access crtc_state after commit, use crtc->state (Maarten
    Lankhorst)

Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Bob Paauwe <bob.j.paauwe at intel.com>
Cc: <dri-devel at lists.freedesktop.org>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 7bf678e..13b86cf 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2979,6 +2979,14 @@ retry:
 	if (ret)
 		goto fail;
 
+	drm_object_property_set_value(&crtc->base,
+			config->degamma_lut_property, 0);
+	drm_object_property_set_value(&crtc->base,
+			config->ctm_property, 0);
+	drm_object_property_set_value(&crtc->base,
+			config->gamma_lut_property,
+			crtc->state->gamma_lut->base.id);
+
 	/* Driver takes ownership of state on successful commit. */
 
 	drm_property_unreference_blob(blob);
-- 
2.8.0.rc3