path: root/drivers/gpu
diff options
authorBhawanpreet Lakha <>2020-03-30 13:43:23 -0400
committerAlex Deucher <>2020-03-31 12:44:29 -0400
commitd6e7042f4e80f2f139c23237da63ffcb060b0710 (patch)
treef8d1f3052367ea673b3dc2dab5860bfa58b0f873 /drivers/gpu
parent2ebbe7c9d11d7fea296c4997b80d2590a0928424 (diff)
drm/amd/display: increase HDCP authentication delay
[Why] Some displays have an issue where the hdcp chips are initialized after the display has already lit up. This means we can sometimes authentication too early and cause authentication failures. This happens when HDCP is enabled and the display is power cycled. Normally we will authenticate 2 seconds after the display is lit, but some displays need a bit more time. [How] Increase delay to 3 second before we start authentication. Signed-off-by: Bhawanpreet Lakha <> Reviewed-by: Nicholas Kazlauskas <> Signed-off-by: Alex Deucher <>
Diffstat (limited to 'drivers/gpu')
1 files changed, 1 insertions, 1 deletions
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 39804d2df9df..78e1c11d4ae5 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
@@ -419,7 +419,7 @@ static void update_config(void *handle, struct cp_psp_stream_config *config)
link->dp.rev = aconnector->dc_link->dpcd_caps.dpcd_rev.raw;
link->dp.mst_supported = config->mst_supported;
display->adjust.disable = 1;
- link->adjust.auth_delay = 2;
+ link->adjust.auth_delay = 3;
link->adjust.hdcp1.disable = 0;
hdcp_update_display(hdcp_work, link_index, aconnector, DRM_MODE_HDCP_CONTENT_TYPE0, false);