On 2020-11-05 at 22:04:15 +0530, Ramalingam C wrote:
> On 2020-10-27 at 22:12:04 +0530, Anshuman Gupta wrote:
> > 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.
> >
> > v2:
> > Init the hdcp port data k for HDMI/DP SST strem.
> >
> > v3:
> > Cosmetic changes. [Uma]
> >
> > Cc: Ramalingam C <ramalinga...@intel.com>
> > Signed-off-by: Anshuman Gupta <anshuman.gu...@intel.com>
> > ---
> > .../drm/i915/display/intel_display_types.h | 4 +-
> > drivers/gpu/drm/i915/display/intel_hdcp.c | 103 +++++++++++++++---
> > 2 files changed, 92 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> > b/drivers/gpu/drm/i915/display/intel_display_types.h
> > index 749c3a7e0b45..24e0067c2e7c 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> > @@ -1445,10 +1445,12 @@ struct intel_digital_port {
> > enum phy_fia tc_phy_fia;
> > u8 tc_phy_fia_idx;
> >
> > - /* protects num_hdcp_streams reference count, port_data */
> > + /* protects num_hdcp_streams reference count, port_data and port_auth */
> > struct mutex hdcp_mutex;
> > /* the number of pipes using HDCP signalling out of this port */
> > unsigned int num_hdcp_streams;
> > + /* port HDCP auth status */
> > + bool port_auth;
> > /* HDCP port data need to pass to security f/w */
> > struct hdcp_port_data port_data;
> since this is no more in hdcp related struct, it will be better to be named as
> hdcp_auth_status and hdcp_port_data !?
sure i will do this chnage.
Thanks,
Anshuman Gupta.
>
> -Ram
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > index a5ec4f72f50f..1df6d4a23476 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -26,6 +26,64 @@
> > #define KEY_LOAD_TRIES 5
> > #define HDCP2_LC_RETRY_CNT 3
> >
> > +static int intel_conn_to_vcpi(struct intel_connector *connector)
> > +{
> > + /* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */
> > + return connector->port ? connector->port->vcpi.vcpi : 0;
> > +}
> > +
> > +static int
> > +intel_hdcp_required_content_stream(struct intel_digital_port *dig_port)
> > +{
> > + struct drm_connector_list_iter conn_iter;
> > + struct intel_digital_port *conn_dig_port;
> > + struct intel_connector *connector;
> > + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > + struct hdcp_port_data *data = &dig_port->port_data;
> > + bool enforce_type0 = false;
> > + int k;
> > +
> > + if (dig_port->port_auth)
> > + return 0;
> > +
> > + drm_connector_list_iter_begin(&i915->drm, &conn_iter);
> > + for_each_intel_connector_iter(connector, &conn_iter) {
> > + if (!intel_encoder_is_mst(intel_attached_encoder(connector)))
> > + continue;
> > +
> > + conn_dig_port = intel_attached_dig_port(connector);
> > + if (conn_dig_port != dig_port)
> > + continue;
> > +
> > + if (connector->base.status == connector_status_disconnected)
> > + continue;
> > +
> > + if (!enforce_type0 && !intel_hdcp2_capable(connector))
> > + enforce_type0 = true;
> > +
> > + data->streams[data->k].stream_id =
> > intel_conn_to_vcpi(connector);
> > + data->k++;
> > +
> > + /* if there is only one active stream */
> > + if (dig_port->dp.active_mst_links <= 1)
> > + break;
> > + }
> > + drm_connector_list_iter_end(&conn_iter);
> > +
> > + if (drm_WARN_ON(&i915->drm, data->k > INTEL_NUM_PIPES(i915) || data->k
> > == 0))
> > + return -EINVAL;
> > +
> > + /*
> > + * Apply common protection level across all streams in DP MST Topology.
> > + * Use highest supported content type for all streams in DP MST
> > Topology.
> > + */
> > + for (k = 0; k < data->k; k++)
> > + data->streams[k].stream_type =
> > + enforce_type0 ? DRM_MODE_HDCP_CONTENT_TYPE0 :
> > DRM_MODE_HDCP_CONTENT_TYPE1;
> > +
> > + return 0;
> > +}
> > +
> > static
> > bool intel_hdcp_is_ksv_valid(u8 *ksv)
> > {
> > @@ -1474,13 +1532,14 @@ static
> > int _hdcp2_propagate_stream_management_info(struct intel_connector
> > *connector)
> > {
> > struct intel_digital_port *dig_port =
> > intel_attached_dig_port(connector);
> > + struct hdcp_port_data *data = &dig_port->port_data;
> > struct intel_hdcp *hdcp = &connector->hdcp;
> > union {
> > struct hdcp2_rep_stream_manage stream_manage;
> > struct hdcp2_rep_stream_ready stream_ready;
> > } msgs;
> > const struct intel_hdcp_shim *shim = hdcp->shim;
> > - int ret;
> > + int ret, streams_size_delta, i;
> >
> > if (connector->hdcp.seq_num_m > HDCP_2_2_SEQ_NUM_MAX)
> > return -ERANGE;
> > @@ -1489,16 +1548,18 @@ int _hdcp2_propagate_stream_management_info(struct
> > intel_connector *connector)
> > msgs.stream_manage.msg_id = HDCP_2_2_REP_STREAM_MANAGE;
> > drm_hdcp_cpu_to_be24(msgs.stream_manage.seq_num_m, hdcp->seq_num_m);
> >
> > - /* K no of streams is fixed as 1. Stored as big-endian. */
> > - msgs.stream_manage.k = cpu_to_be16(1);
> > + msgs.stream_manage.k = cpu_to_be16(data->k);
> >
> > - /* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */
> > - msgs.stream_manage.streams[0].stream_id = 0;
> > - msgs.stream_manage.streams[0].stream_type = hdcp->content_type;
> > + for (i = 0; i < data->k; i++) {
> > + msgs.stream_manage.streams[i].stream_id =
> > data->streams[i].stream_id;
> > + msgs.stream_manage.streams[i].stream_type =
> > data->streams[i].stream_type;
> > + }
> >
> > + streams_size_delta = (HDCP_2_2_MAX_CONTENT_STREAMS_CNT - data->k) *
> > + sizeof(struct hdcp2_streamid_type);
> > /* Send it to Repeater */
> > ret = shim->write_2_2_msg(dig_port, &msgs.stream_manage,
> > - sizeof(msgs.stream_manage));
> > + sizeof(msgs.stream_manage) -
> > streams_size_delta);
> > if (ret < 0)
> > goto out;
> >
> > @@ -1507,8 +1568,7 @@ int _hdcp2_propagate_stream_management_info(struct
> > intel_connector *connector)
> > if (ret < 0)
> > goto out;
> >
> > - dig_port->port_data.seq_num_m = hdcp->seq_num_m;
> > - dig_port->port_data.streams[0].stream_type = hdcp->content_type;
> > + data->seq_num_m = hdcp->seq_num_m;
> >
> > ret = hdcp2_verify_mprime(connector, &msgs.stream_ready);
> >
> > @@ -1669,6 +1729,7 @@ static int hdcp2_enable_encryption(struct
> > intel_connector *connector)
> > port),
> > LINK_ENCRYPTION_STATUS,
> > HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS);
> > + dig_port->port_auth = true;
> >
> > return ret;
> > }
> > @@ -1743,11 +1804,9 @@ static int hdcp2_authenticate_and_encrypt(struct
> > intel_connector *connector)
> > {
> > struct intel_digital_port *dig_port =
> > intel_attached_dig_port(connector);
> > struct drm_i915_private *i915 = to_i915(connector->base.dev);
> > - struct hdcp_port_data *data = &dig_port->port_data;
> > - struct intel_hdcp *hdcp = &connector->hdcp;
> > - int ret, i, tries = 3;
> > + int ret = 0, i, tries = 3;
> >
> > - for (i = 0; i < tries; i++) {
> > + for (i = 0; i < tries && !dig_port->port_auth; i++) {
> > ret = hdcp2_authenticate_sink(connector);
> > if (!ret) {
> > ret = hdcp2_propagate_stream_management_info(connector);
> > @@ -1757,7 +1816,7 @@ static int hdcp2_authenticate_and_encrypt(struct
> > intel_connector *connector)
> > ret);
> > break;
> > }
> > - data->streams[0].stream_type = hdcp->content_type;
> > +
> > ret = hdcp2_authenticate_port(connector);
> > if (!ret)
> > break;
> > @@ -1792,7 +1851,9 @@ static int hdcp2_authenticate_and_encrypt(struct
> > intel_connector *connector)
> >
> > static int _intel_hdcp2_enable(struct intel_connector *connector)
> > {
> > + struct intel_digital_port *dig_port =
> > intel_attached_dig_port(connector);
> > struct drm_i915_private *i915 = to_i915(connector->base.dev);
> > + struct hdcp_port_data *data = &dig_port->port_data;
> > struct intel_hdcp *hdcp = &connector->hdcp;
> > int ret;
> >
> > @@ -1800,6 +1861,16 @@ static int _intel_hdcp2_enable(struct
> > intel_connector *connector)
> > connector->base.name, connector->base.base.id,
> > hdcp->content_type);
> >
> > + /* Stream which requires encryption */
> > + if (!intel_encoder_is_mst(intel_attached_encoder(connector))) {
> > + data->k = 1;
> > + data->streams[0].stream_type = hdcp->content_type;
> > + } else {
> > + ret = intel_hdcp_required_content_stream(dig_port);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > ret = hdcp2_authenticate_and_encrypt(connector);
> > if (ret) {
> > drm_dbg_kms(&i915->drm, "HDCP2 Type%d Enabling Failed. (%d)\n",
> > @@ -1817,7 +1888,9 @@ static int _intel_hdcp2_enable(struct intel_connector
> > *connector)
> >
> > static int _intel_hdcp2_disable(struct intel_connector *connector)
> > {
> > + struct intel_digital_port *dig_port =
> > intel_attached_dig_port(connector);
> > struct drm_i915_private *i915 = to_i915(connector->base.dev);
> > + struct hdcp_port_data *data = &dig_port->port_data;
> > int ret;
> >
> > drm_dbg_kms(&i915->drm, "[%s:%d] HDCP2.2 is being Disabled\n",
> > @@ -1829,6 +1902,8 @@ static int _intel_hdcp2_disable(struct
> > intel_connector *connector)
> > drm_dbg_kms(&i915->drm, "Port deauth failed.\n");
> >
> > connector->hdcp.hdcp2_encrypted = false;
> > + dig_port->port_auth = false;
> > + data->k = 0;
> >
> > return ret;
> > }
> > --
> > 2.26.2
> >
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