Implements the init and exit for hdcp2.2 support. This includes the
mei interface initialization also.

Signed-off-by: Ramalingam C <ramalinga...@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c   |   3 +-
 drivers/gpu/drm/i915/intel_drv.h  |   3 +-
 drivers/gpu/drm/i915/intel_hdcp.c | 145 +++++++++++++++++++++++++++++++++++++-
 drivers/gpu/drm/i915/intel_hdmi.c |   2 +-
 4 files changed, 147 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 8847f1a36504..6f6b4c8e3a42 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6463,7 +6463,8 @@ intel_dp_init_connector(struct intel_digital_port 
*intel_dig_port,
        intel_dp_add_properties(intel_dp, connector);
 
        if (is_hdcp_supported(dev_priv, port) && !intel_dp_is_edp(intel_dp)) {
-               int ret = intel_hdcp_init(intel_connector, &intel_dp_hdcp_shim);
+               int ret = intel_hdcp_init(intel_connector, &intel_dp_hdcp_shim,
+                                         NULL);
                if (ret)
                        DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
        }
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 9c05049c25d5..842a22502763 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1950,7 +1950,8 @@ void intel_hdcp_atomic_check(struct drm_connector 
*connector,
                             struct drm_connector_state *old_state,
                             struct drm_connector_state *new_state);
 int intel_hdcp_init(struct intel_connector *connector,
-                   const struct intel_hdcp_shim *hdcp_shim);
+                   const struct intel_hdcp_shim *hdcp_shim,
+                   const struct intel_hdcp2_shim *hdcp2_shim);
 int intel_hdcp_enable(struct intel_connector *connector);
 int intel_hdcp_disable(struct intel_connector *connector);
 int intel_hdcp_check_link(struct intel_hdcp *hdcp);
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c 
b/drivers/gpu/drm/i915/intel_hdcp.c
index 9d01d1ff8c73..bb56e4e595d8 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -26,6 +26,7 @@ static int _intel_hdcp2_enable(struct intel_hdcp *hdcp);
 static int _intel_hdcp2_disable(struct intel_hdcp *hdcp);
 static void intel_hdcp2_check_work(struct work_struct *work);
 static int intel_hdcp2_check_link(struct intel_hdcp *hdcp);
+static void intel_hdcp2_exit(struct intel_connector *connector);
 
 static inline bool intel_hdcp1_supported(struct intel_hdcp *hdcp)
 {
@@ -738,11 +739,136 @@ bool is_hdcp_supported(struct drm_i915_private 
*dev_priv, enum port port)
                !IS_CHERRYVIEW(dev_priv) && port < PORT_E);
 }
 
-int intel_hdcp_init(struct intel_connector *connector,
-                   const struct intel_hdcp_shim *hdcp_shim)
+static inline int initialize_mei_hdcp_data(struct intel_hdcp *hdcp)
+{
+       struct intel_connector *connector = hdcp->connector;
+       struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+       struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+       enum port port;
+
+       data->cldev = dev_priv->mei_cldev;
+
+       if (connector->encoder) {
+               port = connector->encoder->port;
+               data->port = GET_MEI_DDI_INDEX(port);
+       }
+
+       data->port_type = INTEGRATED;
+       data->protocol = hdcp->hdcp2_shim->hdcp_protocol();
+
+       data->k = 1;
+       if (!data->streams)
+               data->streams = kcalloc(data->k,
+                                       sizeof(struct hdcp2_streamid_type),
+                                       GFP_KERNEL);
+       if (!data->streams)
+               return -ENOMEM;
+
+       data->streams[0].stream_id = 0;
+       data->streams[0].stream_type = hdcp->content_type;
+
+       return 0;
+}
+
+void intel_mei_cldev_reference_notify(void *client,
+                                     struct mei_cl_device *cldev)
+{
+       struct drm_i915_private *dev_priv = client;
+       struct drm_device *dev = &dev_priv->drm;
+       struct intel_connector *intel_connector;
+       struct drm_connector *connector;
+       struct drm_connector_list_iter conn_iter;
+
+       DRM_INFO("MEI_HDCP Notification. Interface: %s\n",
+                 cldev ? "UP" : "Down");
+       dev_priv->mei_cldev = cldev;
+
+       drm_connector_list_iter_begin(dev, &conn_iter);
+       drm_for_each_connector_iter(connector, &conn_iter) {
+               intel_connector = to_intel_connector(connector);
+               if (!intel_connector->hdcp ||
+                   !(intel_connector->hdcp->plat_cap & HDCP2_CAPABILITY))
+                       continue;
+               if (cldev)
+                       initialize_mei_hdcp_data(intel_connector->hdcp);
+               else
+                       intel_hdcp2_exit(intel_connector);
+       }
+       drm_connector_list_iter_end(&conn_iter);
+}
+
+static int intel_hdcp2_init(struct intel_hdcp *hdcp,
+                           const struct intel_hdcp2_shim *shim)
 {
+       struct intel_connector *connector = hdcp->connector;
+       struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
        int ret;
+
+       if (INTEL_GEN(dev_priv) < 10 && !IS_GEMINILAKE(dev_priv) &&
+           !IS_KABYLAKE(dev_priv))
+               return -EINVAL;
+
+       if (!dev_priv->mei_cldev && !dev_priv->mei_ref_cnt) {
+               ret = mei_hdcp_cldev_get_reference((void *)dev_priv,
+                                       &dev_priv->mei_cldev,
+                                       intel_mei_cldev_reference_notify);
+               if (ret < 0)
+                       return ret;
+       }
+
+       dev_priv->mei_ref_cnt++;
+
+       hdcp->hdcp2_shim = shim;
+       hdcp->mei_hdcp_data = kzalloc(sizeof(struct mei_hdcp_data), GFP_KERNEL);
+       if (!hdcp->mei_hdcp_data) {
+               ret = -ENOMEM;
+               goto err_exit;
+       }
+
+       ret = initialize_mei_hdcp_data(hdcp);
+       if (ret)
+               goto err2_exit;
+
+       INIT_DELAYED_WORK(&hdcp->hdcp2_check_work, intel_hdcp2_check_work);
+       hdcp->plat_cap |= HDCP2_CAPABILITY;
+       return 0;
+
+err2_exit:
+       kfree(hdcp->mei_hdcp_data);
+err_exit:
+       if (!(--dev_priv->mei_ref_cnt)) {
+               mei_hdcp_cldev_put_reference(dev_priv->mei_cldev);
+               dev_priv->mei_cldev = NULL;
+       }
+       return ret;
+}
+
+static void intel_hdcp2_exit(struct intel_connector *connector)
+{
+       struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+       struct intel_hdcp *hdcp = connector->hdcp;
+
+       intel_hdcp_disable(connector);
+
+       if (dev_priv->mei_cldev && !(--dev_priv->mei_ref_cnt)) {
+               mei_hdcp_cldev_put_reference(dev_priv->mei_cldev);
+               dev_priv->mei_cldev = NULL;
+       }
+
+       kfree(hdcp->mei_hdcp_data->streams);
+       kfree(hdcp->mei_hdcp_data);
+       hdcp->plat_cap &= ~HDCP2_CAPABILITY;
+}
+
+int intel_hdcp_init(struct intel_connector *connector,
+                   const struct intel_hdcp_shim *hdcp_shim,
+                   const struct intel_hdcp2_shim *hdcp2_shim)
+{
        struct intel_hdcp *hdcp;
+       int ret;
+
+       if (!hdcp_shim && !hdcp2_shim)
+               return -EINVAL;
 
        hdcp = kzalloc(sizeof(struct intel_hdcp), GFP_KERNEL);
        if (!hdcp) {
@@ -750,6 +876,20 @@ int intel_hdcp_init(struct intel_connector *connector,
                goto err;
        }
 
+       hdcp->connector = connector;
+       if (hdcp_shim) {
+
+               /* Initialize HDCP1.4 */
+               INIT_DELAYED_WORK(&hdcp->hdcp_check_work,
+                                 intel_hdcp_check_work);
+               hdcp->hdcp_shim = hdcp_shim;
+
+               hdcp->plat_cap |= HDCP_CAPABILITY;
+       }
+
+       if (hdcp2_shim)
+               intel_hdcp2_init(hdcp, hdcp2_shim);
+
        ret = drm_connector_attach_content_protection_property(
                        &connector->base);
        if (ret)
@@ -757,7 +897,6 @@ int intel_hdcp_init(struct intel_connector *connector,
 
        hdcp->hdcp_shim = hdcp_shim;
        mutex_init(&hdcp->hdcp_mutex);
-       INIT_DELAYED_WORK(&hdcp->hdcp_check_work, intel_hdcp_check_work);
        INIT_WORK(&hdcp->hdcp_prop_work, intel_hdcp_prop_work);
        INIT_WORK(&hdcp->hdcp_enable_work, intel_hdcp_enable_work);
 
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c 
b/drivers/gpu/drm/i915/intel_hdmi.c
index f5d7bfb43006..23986c02dd41 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2342,7 +2342,7 @@ void intel_hdmi_init_connector(struct intel_digital_port 
*intel_dig_port,
 
        if (is_hdcp_supported(dev_priv, port)) {
                int ret = intel_hdcp_init(intel_connector,
-                                         &intel_hdmi_hdcp_shim);
+                                         &intel_hdmi_hdcp_shim, NULL);
                if (ret)
                        DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
        }
-- 
2.7.4

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