When repeater notifies a downstream topology change, this patch
reauthenticate the repeater alone without disabling the hdcp
encryption. If that fails then complete reauthentication is executed.
v2:
Rebased.
v3:
No Changes.
v4:
Typo in commit msg is fixed [Uma]
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_hdcp.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index a0f97a980606..61e1aa8ea26e 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1567,8 +1567,23 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
goto out;
}
- DRM_INFO("[%s:%d] HDCP2.2 link failed, retrying authentication\n",
- connector->base.name, connector->base.base.id);
+ if (ret == DRM_HDCP_TOPOLOGY_CHANGE) {
+ if (hdcp->hdcp_value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+ goto out;
+
+ DRM_DEBUG_KMS("HDCP2.2 Downstream topology change\n");
+ ret = hdcp2_authenticate_repeater_topology(connector);
+ if (!ret) {
+ hdcp->hdcp_value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+ schedule_work(&hdcp->hdcp_prop_work);
+ goto out;
+ }
+ DRM_ERROR("[%s:%d] Repeater topology auth failed.(%d)\n",
+ connector->base.name, connector->base.base.id, ret);
+ } else {
+ DRM_ERROR("[%s:%d] HDCP2.2 link failed, retrying auth\n",
+ connector->base.name, connector->base.base.id);
+ }
ret = _intel_hdcp2_disable(connector);
if (ret) {
--
2.7.4
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