drm/connector: add CEC-related fields

As a preparation to adding HDMI CEC helper code, add CEC-related fields
to the struct drm_connector. The callbacks abstract CEC infrastructure
in order to support CEC adapters and CEC notifiers in a universal way.

CEC data is a void pointer as it allows us to make CEC data
helper-specific. For example, currently it will be either cec_notifier
or cec_adapter + drm_connector_hdmi_cec_funcs. Later cec-pin might store
platform callbacks here. DP CEC might need to store AUX pointer, etc.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250517-drm-hdmi-connector-cec-v6-3-35651db6f19b@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index f13d597370a3..73903c3c842f 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1191,6 +1191,29 @@ struct drm_connector_hdmi_audio_funcs {
 			   bool enable, int direction);
 };
 
+void drm_connector_cec_phys_addr_invalidate(struct drm_connector *connector);
+void drm_connector_cec_phys_addr_set(struct drm_connector *connector);
+
+/**
+ * struct drm_connector_cec_funcs - drm_hdmi_connector control functions
+ */
+struct drm_connector_cec_funcs {
+	/**
+	 * @phys_addr_invalidate: mark CEC physical address as invalid
+	 *
+	 * The callback to mark CEC physical address as invalid, abstracting
+	 * the operation.
+	 */
+	void (*phys_addr_invalidate)(struct drm_connector *connector);
+
+	/**
+	 * @phys_addr_set: set CEC physical address
+	 *
+	 * The callback to set CEC physical address, abstracting the operation.
+	 */
+	void (*phys_addr_set)(struct drm_connector *connector, u16 addr);
+};
+
 /**
  * struct drm_connector_hdmi_funcs - drm_hdmi_connector control functions
  */
@@ -1833,6 +1856,26 @@ struct drm_connector_hdmi {
 };
 
 /**
+ * struct drm_connector_cec - DRM Connector CEC-related structure
+ */
+struct drm_connector_cec {
+	/**
+	 * @mutex: protects all fields in this structure.
+	 */
+	struct mutex mutex;
+
+	/**
+	 * @funcs: CEC Control Functions
+	 */
+	const struct drm_connector_cec_funcs *funcs;
+
+	/**
+	 * @data: CEC implementation-specific data
+	 */
+	void *data;
+};
+
+/**
  * struct drm_connector - central DRM connector control structure
  *
  * Each connector may be connected to one or more CRTCs, or may be clonable by
@@ -2253,6 +2296,11 @@ struct drm_connector {
 	 * @hdmi_audio: HDMI codec properties and non-DRM state.
 	 */
 	struct drm_connector_hdmi_audio hdmi_audio;
+
+	/**
+	 * @cec: CEC-related data.
+	 */
+	struct drm_connector_cec cec;
 };
 
 #define obj_to_connector(x) container_of(x, struct drm_connector, base)