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drm/i915/hdcp: MST streams support in hdcp port_data
Add support for multiple mst stream in hdcp port data which will be used by RepeaterAuthStreamManage msg and HDCP 2.2 security f/w for m' validation. Security f/w doesn't have any provision to mark the stream_type for each stream separately, it just take single input of stream_type while authenticating the port and applies the same stream_type to all streams. So driver mark each stream_type with common highest supported content type for all streams in DP MST Topology. Security f/w supports RepeaterAuthStreamManage msg and m' validation only once during port authentication and encryption. Though it is not compulsory, security fw should support dynamic update of content_type and should support RepeaterAuthStreamManage msg and m' validation whenever required. v2: - Init the hdcp port data k for HDMI/DP SST stream. v3: - Cosmetic changes. [Uma] v4: - 's/port_auth/hdcp_port_auth'. [Ram] - Commit log improvement. v5: - Comment and commit log improvement. [Ram] v6: - Check first connector connected status before intel_encoder_is_mst to avoid any NULL pointer dereference. Cc: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Reviewed-by: Ramalingam C <ramalingam.c@intel.com> Tested-by: Karthik B S <karthik.b.s@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Tested-by: Juston Li <juston.li@intel.com> Acked-by: Juston Li <juston.li@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210111081120.28417-15-anshuman.gupta@intel.com
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90103622c3
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e03187e12c
@ -1516,10 +1516,12 @@ struct intel_digital_port {
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enum phy_fia tc_phy_fia;
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u8 tc_phy_fia_idx;
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/* protects num_hdcp_streams reference count, hdcp_port_data */
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/* protects num_hdcp_streams reference count, hdcp_port_data and hdcp_auth_status */
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struct mutex hdcp_mutex;
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/* the number of pipes using HDCP signalling out of this port */
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unsigned int num_hdcp_streams;
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/* port HDCP auth status */
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bool hdcp_auth_status;
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/* HDCP port data need to pass to security f/w */
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struct hdcp_port_data hdcp_port_data;
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@ -26,6 +26,74 @@
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#define KEY_LOAD_TRIES 5
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#define HDCP2_LC_RETRY_CNT 3
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static int intel_conn_to_vcpi(struct intel_connector *connector)
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{
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/* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */
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return connector->port ? connector->port->vcpi.vcpi : 0;
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}
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/*
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* intel_hdcp_required_content_stream selects the most highest common possible HDCP
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* content_type for all streams in DP MST topology because security f/w doesn't
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* have any provision to mark content_type for each stream separately, it marks
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* all available streams with the content_type proivided at the time of port
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* authentication. This may prohibit the userspace to use type1 content on
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* HDCP 2.2 capable sink because of other sink are not capable of HDCP 2.2 in
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* DP MST topology. Though it is not compulsory, security fw should change its
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* policy to mark different content_types for different streams.
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*/
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static int
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intel_hdcp_required_content_stream(struct intel_digital_port *dig_port)
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{
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struct drm_connector_list_iter conn_iter;
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struct intel_digital_port *conn_dig_port;
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struct intel_connector *connector;
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struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
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struct hdcp_port_data *data = &dig_port->hdcp_port_data;
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bool enforce_type0 = false;
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int k;
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if (dig_port->hdcp_auth_status)
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return 0;
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drm_connector_list_iter_begin(&i915->drm, &conn_iter);
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for_each_intel_connector_iter(connector, &conn_iter) {
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if (connector->base.status == connector_status_disconnected)
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continue;
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if (!intel_encoder_is_mst(intel_attached_encoder(connector)))
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continue;
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conn_dig_port = intel_attached_dig_port(connector);
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if (conn_dig_port != dig_port)
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continue;
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if (!enforce_type0 && !intel_hdcp2_capable(connector))
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enforce_type0 = true;
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data->streams[data->k].stream_id = intel_conn_to_vcpi(connector);
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data->k++;
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/* if there is only one active stream */
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if (dig_port->dp.active_mst_links <= 1)
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break;
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}
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drm_connector_list_iter_end(&conn_iter);
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if (drm_WARN_ON(&i915->drm, data->k > INTEL_NUM_PIPES(i915) || data->k == 0))
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return -EINVAL;
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/*
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* Apply common protection level across all streams in DP MST Topology.
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* Use highest supported content type for all streams in DP MST Topology.
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*/
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for (k = 0; k < data->k; k++)
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data->streams[k].stream_type =
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enforce_type0 ? DRM_MODE_HDCP_CONTENT_TYPE0 : DRM_MODE_HDCP_CONTENT_TYPE1;
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return 0;
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}
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static
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bool intel_hdcp_is_ksv_valid(u8 *ksv)
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{
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@ -1471,13 +1539,14 @@ static
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int _hdcp2_propagate_stream_management_info(struct intel_connector *connector)
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{
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struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
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struct hdcp_port_data *data = &dig_port->hdcp_port_data;
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struct intel_hdcp *hdcp = &connector->hdcp;
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union {
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struct hdcp2_rep_stream_manage stream_manage;
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struct hdcp2_rep_stream_ready stream_ready;
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} msgs;
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const struct intel_hdcp_shim *shim = hdcp->shim;
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int ret;
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int ret, streams_size_delta, i;
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if (connector->hdcp.seq_num_m > HDCP_2_2_SEQ_NUM_MAX)
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return -ERANGE;
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@ -1486,16 +1555,18 @@ int _hdcp2_propagate_stream_management_info(struct intel_connector *connector)
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msgs.stream_manage.msg_id = HDCP_2_2_REP_STREAM_MANAGE;
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drm_hdcp_cpu_to_be24(msgs.stream_manage.seq_num_m, hdcp->seq_num_m);
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/* K no of streams is fixed as 1. Stored as big-endian. */
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msgs.stream_manage.k = cpu_to_be16(1);
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msgs.stream_manage.k = cpu_to_be16(data->k);
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/* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */
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msgs.stream_manage.streams[0].stream_id = 0;
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msgs.stream_manage.streams[0].stream_type = hdcp->content_type;
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for (i = 0; i < data->k; i++) {
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msgs.stream_manage.streams[i].stream_id = data->streams[i].stream_id;
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msgs.stream_manage.streams[i].stream_type = data->streams[i].stream_type;
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}
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streams_size_delta = (HDCP_2_2_MAX_CONTENT_STREAMS_CNT - data->k) *
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sizeof(struct hdcp2_streamid_type);
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/* Send it to Repeater */
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ret = shim->write_2_2_msg(dig_port, &msgs.stream_manage,
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sizeof(msgs.stream_manage));
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sizeof(msgs.stream_manage) - streams_size_delta);
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if (ret < 0)
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goto out;
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@ -1504,8 +1575,7 @@ int _hdcp2_propagate_stream_management_info(struct intel_connector *connector)
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if (ret < 0)
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goto out;
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dig_port->hdcp_port_data.seq_num_m = hdcp->seq_num_m;
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dig_port->hdcp_port_data.streams[0].stream_type = hdcp->content_type;
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data->seq_num_m = hdcp->seq_num_m;
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ret = hdcp2_verify_mprime(connector, &msgs.stream_ready);
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@ -1666,6 +1736,7 @@ static int hdcp2_enable_encryption(struct intel_connector *connector)
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port),
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LINK_ENCRYPTION_STATUS,
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HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS);
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dig_port->hdcp_auth_status = true;
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return ret;
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}
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@ -1740,11 +1811,9 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
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{
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struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
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struct drm_i915_private *i915 = to_i915(connector->base.dev);
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struct hdcp_port_data *data = &dig_port->hdcp_port_data;
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struct intel_hdcp *hdcp = &connector->hdcp;
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int ret, i, tries = 3;
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int ret = 0, i, tries = 3;
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for (i = 0; i < tries; i++) {
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for (i = 0; i < tries && !dig_port->hdcp_auth_status; i++) {
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ret = hdcp2_authenticate_sink(connector);
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if (!ret) {
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ret = hdcp2_propagate_stream_management_info(connector);
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@ -1754,7 +1823,7 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
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ret);
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break;
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}
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data->streams[0].stream_type = hdcp->content_type;
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ret = hdcp2_authenticate_port(connector);
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if (!ret)
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break;
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@ -1789,7 +1858,9 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
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static int _intel_hdcp2_enable(struct intel_connector *connector)
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{
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struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
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struct drm_i915_private *i915 = to_i915(connector->base.dev);
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struct hdcp_port_data *data = &dig_port->hdcp_port_data;
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struct intel_hdcp *hdcp = &connector->hdcp;
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int ret;
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@ -1797,6 +1868,16 @@ static int _intel_hdcp2_enable(struct intel_connector *connector)
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connector->base.name, connector->base.base.id,
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hdcp->content_type);
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/* Stream which requires encryption */
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if (!intel_encoder_is_mst(intel_attached_encoder(connector))) {
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data->k = 1;
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data->streams[0].stream_type = hdcp->content_type;
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} else {
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ret = intel_hdcp_required_content_stream(dig_port);
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if (ret)
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return ret;
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}
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ret = hdcp2_authenticate_and_encrypt(connector);
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if (ret) {
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drm_dbg_kms(&i915->drm, "HDCP2 Type%d Enabling Failed. (%d)\n",
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@ -1814,7 +1895,9 @@ static int _intel_hdcp2_enable(struct intel_connector *connector)
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static int _intel_hdcp2_disable(struct intel_connector *connector)
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{
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struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
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struct drm_i915_private *i915 = to_i915(connector->base.dev);
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struct hdcp_port_data *data = &dig_port->hdcp_port_data;
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int ret;
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drm_dbg_kms(&i915->drm, "[%s:%d] HDCP2.2 is being Disabled\n",
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@ -1826,6 +1909,8 @@ static int _intel_hdcp2_disable(struct intel_connector *connector)
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drm_dbg_kms(&i915->drm, "Port deauth failed.\n");
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connector->hdcp.hdcp2_encrypted = false;
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dig_port->hdcp_auth_status = false;
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data->k = 0;
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return ret;
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}
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