[PATCH 37/43] drm/i915: Initialize HDCP2.2 and its MEI interface

Ramalingam C
2018-02-14T14:21:14Z

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

Signed-off-by: Ramalingam C <ramalingam.c@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");
}