Implements a sequence of enabling and disabling the HDCP2.2
(auth and encryption).
v2:
Rebased.
v3:
No Changes.
v4:
No Changes.
v5:
Rebased as part of the patch reordering.
HDCP2 encryption status is tracked.
Signed-off-by: Ramalingam C <ramalinga...@intel.com>
---
drivers/gpu/drm/i915/intel_hdcp.c | 105 +++++++++++++++++++++++++++++++++++++-
1 file changed, 104 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c
b/drivers/gpu/drm/i915/intel_hdcp.c
index 34bafc2025f7..f72684488bc7 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -994,14 +994,117 @@ int intel_hdcp_check_link(struct intel_connector
*connector)
return ret;
}
+static int hdcp2_close_mei_session(struct intel_connector *connector)
+{
+ struct mei_hdcp_data *data = &connector->hdcp.mei_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_hdcp_component *comp = dev_priv->hdcp_comp;
+ int ret;
+
+ if (!comp)
+ return -EINVAL;
+
+ mutex_lock(&comp->mutex);
+ if (!comp->ops || !comp->mei_cldev || data->port == INVALID_PORT) {
+ mutex_unlock(&comp->mutex);
+ return -EINVAL;
+ }
+ ret = comp->ops->close_hdcp_session(comp->mei_cldev, data);
+ mutex_unlock(&comp->mutex);
+
+ return ret;
+}
+
+static int hdcp2_deauthenticate_port(struct intel_connector *connector)
+{
+ return hdcp2_close_mei_session(connector);
+}
+
+static int hdcp2_authenticate_sink(struct intel_connector *connector)
+{
+ return 0;
+}
+
+static int hdcp2_enable_encryption(struct intel_connector *connector)
+{
+ return 0;
+}
+
+static int hdcp2_disable_encryption(struct intel_connector *connector)
+{
+ return 0;
+}
+
+static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
+{
+ int ret, i, tries = 3;
+
+ for (i = 0; i < tries; i++) {
+ ret = hdcp2_authenticate_sink(connector);
+ if (!ret)
+ break;
+
+ /* Clearing the mei hdcp session */
+ hdcp2_deauthenticate_port(connector);
+ DRM_DEBUG_KMS("HDCP2.2 Auth %d of %d Failed.(%d)\n",
+ i + 1, tries, ret);
+ }
+
+ if (i != tries) {
+ /*
+ * Ensuring the required 200mSec min time interval between
+ * Session Key Exchange and encryption.
+ */
+ msleep(HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN);
+ ret = hdcp2_enable_encryption(connector);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("Encryption Enable Failed.(%d)\n", ret);
+ hdcp2_deauthenticate_port(connector);
+ }
+ }
+
+ return ret;
+}
+
static int _intel_hdcp2_enable(struct intel_connector *connector)
{
+ struct intel_hdcp *hdcp = &connector->hdcp;
+ int ret;
+
+ DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being enabled. Type: %d\n",
+ connector->base.name, connector->base.base.id,
+ hdcp->content_type);
+
+ ret = hdcp2_authenticate_and_encrypt(connector);
+ if (ret) {
+ DRM_ERROR("HDCP2 Type%d Enabling Failed. (%d)\n",
+ hdcp->content_type, ret);
+ return ret;
+ }
+
+ DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is enabled. Type %d\n",
+ connector->base.name, connector->base.base.id,
+ hdcp->content_type);
+
+ hdcp->hdcp2_in_use = true;
+ hdcp->hdcp_value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+ schedule_work(&hdcp->hdcp_prop_work);
return 0;
}
static int _intel_hdcp2_disable(struct intel_connector *connector)
{
- return 0;
+ int ret;
+
+ DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being Disabled\n",
+ connector->base.name, connector->base.base.id);
+
+ ret = hdcp2_disable_encryption(connector);
+
+ hdcp2_deauthenticate_port(connector);
+ connector->hdcp.hdcp2_in_use = false;
+
+ return ret;
}
static int i915_hdcp_component_master_bind(struct device *dev)
--
2.7.4
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