drm/i915: Attach content type property

Attaches the content type property for HDCP2.2 capable connectors.

Implements the update of content type from property and apply the
restriction on HDCP version selection.

Need ACK for content type property from userspace consumer.

v2:
  s/cp_content_type/content_protection_type [daniel]
  disable at hdcp_atomic_check to avoid check at atomic_set_property
	[Maarten]
v3:
  s/content_protection_type/hdcp_content_type [Pekka]
v4:
  hdcp disable incase of type change is moved into commit [daniel].
v5:
  Simplified the Type change procedure. [Daniel]
v6:
  Type change with UNDESIRED state is ignored.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/320959/?series=57232&rev=14

1 files changed, 28 insertions, 15 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 2a4d10952b74..4580af57bddb 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -1748,14 +1748,15 @@ static const struct component_ops i915_hdcp_component_ops = {
 	.unbind = i915_hdcp_component_unbind,
 };
 
-static inline int initialize_hdcp_port_data(struct intel_connector *connector)
+static inline int initialize_hdcp_port_data(struct intel_connector *connector,
+					    const struct intel_hdcp_shim *shim)
 {
 	struct intel_hdcp *hdcp = &connector->hdcp;
 	struct hdcp_port_data *data = &hdcp->port_data;
 
 	data->port = connector->encoder->port;
 	data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
-	data->protocol = (u8)hdcp->shim->protocol;
+	data->protocol = (u8)shim->protocol;
 
 	data->k = 1;
 	if (!data->streams)
@@ -1805,12 +1806,13 @@ void intel_hdcp_component_init(struct drm_i915_private *dev_priv)
 	}
 }
 
-static void intel_hdcp2_init(struct intel_connector *connector)
+static void intel_hdcp2_init(struct intel_connector *connector,
+			     const struct intel_hdcp_shim *shim)
 {
 	struct intel_hdcp *hdcp = &connector->hdcp;
 	int ret;
 
-	ret = initialize_hdcp_port_data(connector);
+	ret = initialize_hdcp_port_data(connector, shim);
 	if (ret) {
 		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
 		return;
@@ -1829,25 +1831,28 @@ int intel_hdcp_init(struct intel_connector *connector,
 	if (!shim)
 		return -EINVAL;
 
+	if (is_hdcp2_supported(dev_priv))
+		intel_hdcp2_init(connector, shim);
+
 	ret =
 	drm_connector_attach_content_protection_property(&connector->base,
-							 false);
-	if (ret)
+							 hdcp->hdcp2_supported);
+	if (ret) {
+		hdcp->hdcp2_supported = false;
+		kfree(hdcp->port_data.streams);
 		return ret;
+	}
 
 	hdcp->shim = shim;
 	mutex_init(&hdcp->mutex);
 	INIT_DELAYED_WORK(&hdcp->check_work, intel_hdcp_check_work);
 	INIT_WORK(&hdcp->prop_work, intel_hdcp_prop_work);
-
-	if (is_hdcp2_supported(dev_priv))
-		intel_hdcp2_init(connector);
 	init_waitqueue_head(&hdcp->cp_irq_queue);
 
 	return 0;
 }
 
-int intel_hdcp_enable(struct intel_connector *connector)
+int intel_hdcp_enable(struct intel_connector *connector, u8 content_type)
 {
 	struct intel_hdcp *hdcp = &connector->hdcp;
 	unsigned long check_link_interval = DRM_HDCP_CHECK_PERIOD_MS;
@@ -1858,6 +1863,7 @@ int intel_hdcp_enable(struct intel_connector *connector)
 
 	mutex_lock(&hdcp->mutex);
 	WARN_ON(hdcp->value == DRM_MODE_CONTENT_PROTECTION_ENABLED);
+	hdcp->content_type = content_type;
 
 	/*
 	 * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
@@ -1869,8 +1875,12 @@ int intel_hdcp_enable(struct intel_connector *connector)
 			check_link_interval = DRM_HDCP2_CHECK_PERIOD_MS;
 	}
 
-	/* When HDCP2.2 fails, HDCP1.4 will be attempted */
-	if (ret && intel_hdcp_capable(connector)) {
+	/*
+	 * When HDCP2.2 fails and Content Type is not Type1, HDCP1.4 will
+	 * be attempted.
+	 */
+	if (ret && intel_hdcp_capable(connector) &&
+	    hdcp->content_type != DRM_MODE_HDCP_CONTENT_TYPE1) {
 		ret = _intel_hdcp_enable(connector);
 	}
 
@@ -1952,12 +1962,15 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 
 	/*
 	 * Nothing to do if the state didn't change, or HDCP was activated since
-	 * the last commit
+	 * the last commit. And also no change in hdcp content type.
 	 */
 	if (old_cp == new_cp ||
 	    (old_cp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
-	     new_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED))
-		return;
+	     new_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED)) {
+		if (old_state->hdcp_content_type ==
+				new_state->hdcp_content_type)
+			return;
+	}
 
 	crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
 						   new_state->crtc);