[PATCH] drm/amd/display: Fix duplicating scaling/underscan connector state

[Nicholas Kazlauskas]

[Why]
These properties aren't being carried over when the atomic state.
This tricks atomic check and commit tail into performing underscan
and scaling operations when they aren't needed.

With the patch that forced scaling/RMX_ASPECT on by default this
results in many unnecessary surface updates and hangs under certain
conditions.

[How]
Duplicate the properties.

Fixes: 91b66c47ba34 ("drm/amd/display: Set RMX_ASPECT as default")

Cc: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
Cc: Leo Li <sunpeng.li at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 23d61570df17..ddf5efd1a5f4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3242,6 +3242,10 @@ amdgpu_dm_connector_atomic_duplicate_state(struct drm_connector *connector)
 
 	new_state->freesync_capable = state->freesync_capable;
 	new_state->abm_level = state->abm_level;
+	new_state->scaling = state->scaling;
+	new_state->underscan_enable = state->underscan_enable;
+	new_state->underscan_hborder = state->underscan_hborder;
+	new_state->underscan_vborder = state->underscan_vborder;
 	new_state->max_bpc = state->max_bpc;
 
 	return &new_state->base;
-- 
2.17.1