[PATCH v3 03/10] drm/i915: Attach content type property

[Ramalingam C]

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.

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]

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c  | 21 +++++++++++++++------
 drivers/gpu/drm/i915/intel_drv.h  |  2 +-
 drivers/gpu/drm/i915/intel_hdcp.c | 30 +++++++++++++++++++++++++-----
 3 files changed, 41 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 933df3a57a8a..43859f126b82 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3495,7 +3495,8 @@ static void intel_enable_ddi(struct intel_encoder *encoder,
 	/* Enable hdcp if it's desired */
 	if (conn_state->content_protection ==
 	    DRM_MODE_CONTENT_PROTECTION_DESIRED)
-		intel_hdcp_enable(to_intel_connector(conn_state->connector));
+		intel_hdcp_enable(to_intel_connector(conn_state->connector),
+				  (u8)conn_state->hdcp_content_type);
 }
 
 static void intel_disable_ddi_dp(struct intel_encoder *encoder,
@@ -3558,21 +3559,29 @@ static void intel_ddi_update_pipe_dp(struct intel_encoder *encoder,
 	intel_panel_update_backlight(encoder, crtc_state, conn_state);
 }
 
-static void intel_ddi_update_pipe(struct intel_encoder *encoder,
+static void intel_ddi_update_hdcp(struct intel_encoder *encoder,
 				  const struct intel_crtc_state *crtc_state,
 				  const struct drm_connector_state *conn_state)
 {
-	if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
-		intel_ddi_update_pipe_dp(encoder, crtc_state, conn_state);
-
 	if (conn_state->content_protection ==
 	    DRM_MODE_CONTENT_PROTECTION_DESIRED)
-		intel_hdcp_enable(to_intel_connector(conn_state->connector));
+		intel_hdcp_enable(to_intel_connector(conn_state->connector),
+				  (u8)conn_state->hdcp_content_type);
 	else if (conn_state->content_protection ==
 		 DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
 		intel_hdcp_disable(to_intel_connector(conn_state->connector));
 }
 
+static void intel_ddi_update_pipe(struct intel_encoder *encoder,
+				  const struct intel_crtc_state *crtc_state,
+				  const struct drm_connector_state *conn_state)
+{
+	if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+		intel_ddi_update_pipe_dp(encoder, crtc_state, conn_state);
+
+	intel_ddi_update_hdcp(encoder, crtc_state, conn_state);
+}
+
 static void intel_ddi_set_fia_lane_count(struct intel_encoder *encoder,
 					 const struct intel_crtc_state *pipe_config,
 					 enum port port)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a37a4477994c..e387e842f414 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -2178,7 +2178,7 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 			     struct drm_connector_state *new_state);
 int intel_hdcp_init(struct intel_connector *connector,
 		    const struct intel_hdcp_shim *hdcp_shim);
-int intel_hdcp_enable(struct intel_connector *connector);
+int intel_hdcp_enable(struct intel_connector *connector, u8 content_type);
 int intel_hdcp_disable(struct intel_connector *connector);
 bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
 bool intel_hdcp_capable(struct intel_connector *connector);
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index ff9497e5c591..9b4904a62744 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1782,6 +1782,13 @@ static void intel_hdcp2_init(struct intel_connector *connector)
 		return;
 	}
 
+	ret = drm_connector_attach_hdcp_content_type_property(
+						&connector->base);
+	if (ret) {
+		kfree(hdcp->port_data.streams);
+		return;
+	}
+
 	hdcp->hdcp2_supported = true;
 }
 
@@ -1811,7 +1818,7 @@ int intel_hdcp_init(struct intel_connector *connector,
 	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;
@@ -1822,6 +1829,7 @@ 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
@@ -1833,8 +1841,12 @@ 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);
 	}
 
@@ -1901,6 +1913,8 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 {
 	u64 old_cp = old_state->content_protection;
 	u64 new_cp = new_state->content_protection;
+	u64 old_type = old_state->hdcp_content_type;
+	u64 new_type = new_state->hdcp_content_type;
 	struct drm_crtc_state *crtc_state;
 
 	if (!new_state->crtc) {
@@ -1920,8 +1934,14 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 	 */
 	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_type == new_type)
+			return;
+
+		new_state->content_protection =
+			DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		intel_hdcp_disable(to_intel_connector(connector));
+	}
 
 	crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
 						   new_state->crtc);
-- 
2.19.1