[PATCH v3 08/10] drm/i915: Populate downstream info for HDCP2.2

[Ramalingam C]

Populates the downstream info for HDCP2.2 encryption also. On success
of encryption Blob is updated.

Additional two variable are added to downstream info blob. Such as
ver_in_force and content type.

v2:
  s/cp_downstream/content_protection_downstream [daniel]
v3:
  s/content_protection_downstream/hdcp_topology [daniel]

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
 drivers/gpu/drm/i915/intel_hdcp.c | 26 +++++++++++++++++++++++++-
 include/uapi/drm/drm_mode.h       |  3 +++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 0e3d7afecd5a..1eea553cdf81 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1281,6 +1281,12 @@ static int hdcp2_authentication_key_exchange(struct intel_connector *connector)
 		return -EPERM;
 	}
 
+	hdcp->topology_info->ver_in_force = DRM_MODE_HDCP22_IN_FORCE;
+	hdcp->topology_info->content_type = hdcp->content_type;
+	memcpy(hdcp->topology_info->bksv, msgs.send_cert.cert_rx.receiver_id,
+	       HDCP_2_2_RECEIVER_ID_LEN);
+	hdcp->topology_info->is_repeater = hdcp->is_repeater;
+
 	/*
 	 * Here msgs.no_stored_km will hold msgs corresponding to the km
 	 * stored also.
@@ -1472,6 +1478,11 @@ int hdcp2_authenticate_repeater_topology(struct intel_connector *connector)
 		return -EPERM;
 	}
 
+	hdcp->topology_info->device_count = device_cnt;
+	hdcp->topology_info->depth = HDCP_2_2_DEPTH(rx_info[0]);
+	memcpy(hdcp->topology_info->ksv_list, msgs.recvid_list.receiver_ids,
+	       device_cnt * HDCP_2_2_RECEIVER_ID_LEN);
+
 	ret = hdcp2_verify_rep_topology_prepare_ack(connector,
 						    &msgs.recvid_list,
 						    &msgs.rep_ack);
@@ -1658,6 +1669,12 @@ static int _intel_hdcp2_enable(struct intel_connector *connector)
 	if (ret) {
 		DRM_DEBUG_KMS("HDCP2 Type%d  Enabling Failed. (%d)\n",
 			      hdcp->content_type, ret);
+
+		memset(hdcp->topology_info, 0,
+		       sizeof(struct hdcp_topology_info));
+		drm_connector_update_hdcp_topology_property(&connector->base,
+							  hdcp->topology_info);
+
 		return ret;
 	}
 
@@ -1665,12 +1682,16 @@ static int _intel_hdcp2_enable(struct intel_connector *connector)
 		      connector->base.name, connector->base.base.id,
 		      hdcp->content_type);
 
+	drm_connector_update_hdcp_topology_property(&connector->base,
+						    hdcp->topology_info);
 	hdcp->hdcp2_encrypted = true;
+
 	return 0;
 }
 
 static int _intel_hdcp2_disable(struct intel_connector *connector)
 {
+	struct intel_hdcp *hdcp = &connector->hdcp;
 	int ret;
 
 	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being Disabled\n",
@@ -1681,8 +1702,11 @@ static int _intel_hdcp2_disable(struct intel_connector *connector)
 	if (hdcp2_deauthenticate_port(connector) < 0)
 		DRM_DEBUG_KMS("Port deauth failed.\n");
 
-	connector->hdcp.hdcp2_encrypted = false;
+	hdcp->hdcp2_encrypted = false;
 
+	memset(hdcp->topology_info, 0, sizeof(struct hdcp_topology_info));
+	drm_connector_update_hdcp_topology_property(&connector->base,
+						    hdcp->topology_info);
 	return ret;
 }
 
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 733db7283e57..22f5940a47cc 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -223,6 +223,9 @@ struct hdcp_topology_info {
 	/* Version of HDCP authenticated (1.4/2.2) */
 	__u32 ver_in_force;
 
+	/* Applicable only for HDCP2.2 */
+	__u8 content_type;
+
 	/* KSV of immediate HDCP Sink. In Little-Endian Format. */
 	char bksv[DRM_MODE_HDCP_KSV_LEN];
 
-- 
2.19.1