[PATCH] drm/amd/display: Fix external display detection with overlay

[Pratik Vishwakarma]

[Why]
When overlay plane is in use and external display
is connected, atomic check will fail.

[How]
Disable overlay plane on multi-monitor scenario
by tying it to single crtc.

Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 e8177656e083..e45c1176048a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3149,7 +3149,7 @@ static int initialize_plane(struct amdgpu_display_manager *dm,
 	 */
 	possible_crtcs = 1 << plane_id;
 	if (plane_id >= dm->dc->caps.max_streams)
-		possible_crtcs = 0xff;
+		possible_crtcs = 0x01;
 
 	ret = amdgpu_dm_plane_init(dm, plane, possible_crtcs, plane_cap);
 
-- 
2.17.1