[PATCH 18/21] drm/amd/display: Fixed corruption on 4K tvs

[Qingqing Zhuo]

From: Harry VanZyllDeJong <hvanzyll at amd.com>

[WHY]
When on the desktop freesync is not enabled,
doing a frame stretch causes the TV to display
undesired output.

[HOW]
By changing the logic so that when ever fresync
is supported the TV is notified we are in fressync
instead on a non fresync state.

Signed-off-by: Harry VanZyllDeJong <hvanzyll at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Anthony Koo <Anthony.Koo at amd.com>
Acked-by: Jun Lei <Jun.Lei at amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo at amd.com>
---
 drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 4287be79c11a..3f4f44b44e6a 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -543,8 +543,8 @@ static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr,
 		infopacket->sb[6] |= 0x02;
 
 	/* PB6 = [Bit 2 = FreeSync Active] */
-	if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
-			vrr->state == VRR_STATE_ACTIVE_FIXED)
+	if (vrr->state != VRR_STATE_DISABLED &&
+			vrr->state != VRR_STATE_UNSUPPORTED)
 		infopacket->sb[6] |= 0x04;
 
 	// For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range
-- 
2.17.1