From: Harry VanZyllDeJong <hvanzyll@amd.com>
Date: Fri, 26 Mar 2021 15:20:58 +0000 (-0400)
Subject: drm/amd/display: Fixed corruption on 4K tvs
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0774e08adf5fe789eac2f9feca9c4eab03cbbc69;p=linux.git

drm/amd/display: Fixed corruption on 4K tvs

[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@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 4287be79c11ae..3f4f44b44e6a9 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