@@ -826,13 +826,9 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
intel_attach_force_audio_property(connector);
intel_attach_broadcast_rgb_property(connector);
-
- /* TODO: Figure out how to make HDCP work on GEN12+ */
- if (INTEL_GEN(dev_priv) < 12) {
- ret = intel_dp_init_hdcp(dig_port, intel_connector);
- if (ret)
- DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
- }
+ ret = intel_dp_init_hdcp(dig_port, intel_connector);
+ if (ret)
+ drm_dbg_kms(&dev_priv->drm, "HDCP init failed, skipping.\n");
/*
* Reuse the prop from the SST connector because we're
@@ -612,7 +612,12 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector)
return ret;
}
-/* Implements Part 1 of the HDCP authorization procedure */
+/*
+ * Implements Part 1 of the HDCP authorization procedure.
+ * Authentication Part 1 steps for Multi-stream DisplayPort.
+ * Step 1. Auth Part 1 sequence on the driving MST Trasport Link.
+ * Step 2. Enable encryption for each stream that requires encryption.
+ */
static int intel_hdcp_auth(struct intel_connector *connector)
{
struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
@@ -766,10 +771,16 @@ static int intel_hdcp_auth(struct intel_connector *connector)
return -ETIMEDOUT;
}
- /*
- * XXX: If we have MST-connected devices, we need to enable encryption
- * on those as well.
- */
+ /* DP MST Auth Part 1 Step 2.a and Step 2.b */
+ if (shim->stream_encryption) {
+ ret = shim->stream_encryption(dig_port, true);
+ if (ret) {
+ drm_err(&dev_priv->drm, "Failed to enable HDCP 1.4 stream enc\n");
+ return ret;
+ }
+ drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 tras %s stream encrypted\n",
+ transcoder_name(hdcp->stream_transcoder));
+ }
if (repeater_present)
return intel_hdcp_auth_downstream(connector);
@@ -790,19 +801,26 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n",
connector->base.name, connector->base.base.id);
+ /*
+ * Step 1: Deselect HDCP Multiplestream Bit.
+ * Step 2: poll for stream encryption status to be disable.
+ */
+ if (hdcp->shim->stream_encryption) {
+ ret = hdcp->shim->stream_encryption(dig_port, false);
+ if (ret) {
+ drm_err(&dev_priv->drm, "Failed to disable HDCP 1.4 stream enc\n");
+ return ret;
+ }
+ drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 trans %s stream encryption disabled\n",
+ transcoder_name(hdcp->stream_transcoder));
+ }
/*
- * If there are other connectors on this port using HDCP, don't disable
- * it. Instead, toggle the HDCP signalling off on that particular
- * connector/pipe and exit.
+ * If there are other connectors on this port using HDCP, don't disable it.
+ * Repeat steps 1-2 for each stream that no longer requires encryption.
*/
- if (dig_port->num_hdcp_streams > 0) {
- ret = hdcp->shim->toggle_signalling(dig_port,
- cpu_transcoder, false);
- if (ret)
- DRM_ERROR("Failed to disable HDCP signalling\n");
+ if (dig_port->num_hdcp_streams > 0)
return ret;
- }
hdcp->hdcp_encrypted = false;
intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0);
Enable HDCP 1.4 over DP MST for Gen12. This also enable the stream encryption support for older generations, which was missing earlier. v2: - Added debug print for stream encryption. - Disable the hdcp on port after disabling last stream encryption. Cc: Ramalingam C <ramalingam.c@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> --- drivers/gpu/drm/i915/display/intel_dp_mst.c | 10 ++--- drivers/gpu/drm/i915/display/intel_hdcp.c | 46 ++++++++++++++------- 2 files changed, 35 insertions(+), 21 deletions(-)