drm/i915/hdcp: Convert intel_hdcp_enable to a blanket function

Let's convert intel_hdcp_enable to a blanket function
which just has some conditions which needs to be checked
before connectors enable hdcp.
This cleans up code and avoids code duplication.

--v3
-Keep function name as intel_hdcp_enable() [Jani]
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231026121139.987437-3-suraj.kandpal@intel.com

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -3259,9 +3259,6 @@ static void intel_enable_ddi(struct intel_atomic_state *state,
 	else
 		intel_enable_ddi_dp(state, encoder, crtc_state, conn_state);
 
-	/* Enable hdcp if it's desired */
-	if (conn_state->content_protection ==
-	    DRM_MODE_CONTENT_PROTECTION_DESIRED)
 	intel_hdcp_enable(state, encoder, crtc_state, conn_state);
 }
 

drivers/gpu/drm/i915/display/intel_dp_mst.c

@@ -836,9 +836,6 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state,
 
 	intel_audio_codec_enable(encoder, pipe_config, conn_state);
 
-	/* Enable hdcp if it's desired */
-	if (conn_state->content_protection ==
-	    DRM_MODE_CONTENT_PROTECTION_DESIRED)
 	intel_hdcp_enable(state, encoder, pipe_config, conn_state);
 }
 

drivers/gpu/drm/i915/display/intel_hdcp.c

@@ -2324,7 +2324,7 @@ intel_hdcp_set_streams(struct intel_digital_port *dig_port,
 	return 0;
 }
 
-int intel_hdcp_enable(struct intel_atomic_state *state,
+static int _intel_hdcp_enable(struct intel_atomic_state *state,
 			      struct intel_encoder *encoder,
 			      const struct intel_crtc_state *pipe_config,
 			      const struct drm_connector_state *conn_state)
@@ -2404,6 +2404,17 @@ int intel_hdcp_enable(struct intel_atomic_state *state,
 	return ret;
 }
 
+void intel_hdcp_enable(struct intel_atomic_state *state,
+		       struct intel_encoder *encoder,
+		       const struct intel_crtc_state *crtc_state,
+		       const struct drm_connector_state *conn_state)
+{
+	/* Enable hdcp if it's desired */
+	if (conn_state->content_protection ==
+	    DRM_MODE_CONTENT_PROTECTION_DESIRED)
+		_intel_hdcp_enable(state, encoder, crtc_state, conn_state);
+}
+
 int intel_hdcp_disable(struct intel_connector *connector)
 {
 	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
@@ -2491,7 +2502,7 @@ void intel_hdcp_update_pipe(struct intel_atomic_state *state,
 	}
 
 	if (desired_and_not_enabled || content_protection_type_changed)
-		intel_hdcp_enable(state, encoder, crtc_state, conn_state);
+		_intel_hdcp_enable(state, encoder, crtc_state, conn_state);
 }
 
 void intel_hdcp_component_fini(struct drm_i915_private *i915)

drivers/gpu/drm/i915/display/intel_hdcp.h

@@ -28,7 +28,7 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 int intel_hdcp_init(struct intel_connector *connector,
 		    struct intel_digital_port *dig_port,
 		    const struct intel_hdcp_shim *hdcp_shim);
-int intel_hdcp_enable(struct intel_atomic_state *state,
+void intel_hdcp_enable(struct intel_atomic_state *state,
 		       struct intel_encoder *encoder,
 		       const struct intel_crtc_state *pipe_config,
 		       const struct drm_connector_state *conn_state);