[PATCH AUTOSEL 6.2 28/45] drm/amd/display: Fix HDCP failing to enable after suspend

[Sasha Levin]

From: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>

[ Upstream commit 728cefa53a36ba378ed4a7f31a0c08289687d824 ]

[Why]
On resume some displays are not ready for HDCP, so they will fail if we
start the hdcp authentintication too soon.

Add a delay so that the displays can be ready before we start.

NOTE: Previoulsy this delay was set to 3 seconds but it was causing
issues with compliance, 2 seconds should enough for compliance and the
s3 resume case.

[How]
Change the Delay to 2 seconds.

Reviewed-by: Aurabindo Pillai <Aurabindo.Pillai at amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo at amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
index a7fd98f57f94c..dc62375a8e2c4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
@@ -495,7 +495,7 @@ static void update_config(void *handle, struct cp_psp_stream_config *config)
 	link->dp.mst_enabled = config->mst_enabled;
 	link->dp.usb4_enabled = config->usb4_enabled;
 	display->adjust.disable = MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION;
-	link->adjust.auth_delay = 0;
+	link->adjust.auth_delay = 2;
 	link->adjust.hdcp1.disable = 0;
 	conn_state = aconnector->base.state;
 
-- 
2.39.2