1 files changed, 72 insertions, 0 deletions
diff --git a/include/drm/display/drm_hdmi_cec_helper.h b/include/drm/display/drm_hdmi_cec_helper.h
new file mode 100644
index 000000000000..fd8f4d2f02c1
--- /dev/null
+++ b/include/drm/display/drm_hdmi_cec_helper.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef DRM_DISPLAY_HDMI_CEC_HELPER
+#define DRM_DISPLAY_HDMI_CEC_HELPER
+
+#include <linux/types.h>
+
+struct drm_connector;
+
+struct cec_msg;
+struct device;
+
+struct drm_connector_hdmi_cec_funcs {
+	/**
+	 * @init: perform hardware-specific initialization before registering the CEC adapter
+	 */
+	int (*init)(struct drm_connector *connector);
+
+	/**
+	 * @uninit: perform hardware-specific teardown for the CEC adapter
+	 */
+	void (*uninit)(struct drm_connector *connector);
+
+	/**
+	 * @enable: enable or disable CEC adapter
+	 */
+	int (*enable)(struct drm_connector *connector, bool enable);
+
+	/**
+	 * @log_addr: set adapter's logical address, can be called multiple
+	 * times if adapter supports several LAs
+	 */
+	int (*log_addr)(struct drm_connector *connector, u8 logical_addr);
+
+	/**
+	 * @transmit: start transmission of the specified CEC message
+	 */
+	int (*transmit)(struct drm_connector *connector, u8 attempts,
+			u32 signal_free_time, struct cec_msg *msg);
+};
+
+int drmm_connector_hdmi_cec_register(struct drm_connector *connector,
+				     const struct drm_connector_hdmi_cec_funcs *funcs,
+				     const char *name,
+				     u8 available_las,
+				     struct device *dev);
+
+void drm_connector_hdmi_cec_received_msg(struct drm_connector *connector,
+					 struct cec_msg *msg);
+
+void drm_connector_hdmi_cec_transmit_done(struct drm_connector *connector,
+					  u8 status,
+					  u8 arb_lost_cnt, u8 nack_cnt,
+					  u8 low_drive_cnt, u8 error_cnt);
+
+void drm_connector_hdmi_cec_transmit_attempt_done(struct drm_connector *connector,
+						  u8 status);
+
+#if IS_ENABLED(CONFIG_DRM_DISPLAY_HDMI_CEC_NOTIFIER_HELPER)
+int drmm_connector_hdmi_cec_notifier_register(struct drm_connector *connector,
+					      const char *port_name,
+					      struct device *dev);
+#else
+static inline int drmm_connector_hdmi_cec_notifier_register(struct drm_connector *connector,
+							    const char *port_name,
+							    struct device *dev)
+{
+	return 0;
+}
+#endif
+
+#endif