media: cec: add struct cec_connector_info support

Define struct cec_connector_info in media/cec.h and define
CEC_CAP_CONNECTOR_INFO. In a later patch this will be moved to
uapi/linux/cec.h.

The CEC_CAP_CONNECTOR_INFO capability can be set by drivers, but
cec_allocate_adapter() will remove it again until the public API
for this can be enabled once all drm drivers wire this up correctly.

Also add the cec_fill_conn_info_from_drm and cec_s_conn_info functions,
which are needed by drm drivers to fill in the cec_connector info
based on a drm_connector.

The cec_notifier_(un)register and cec_register_cec_notifier
prototypes were moved from cec-notifier.h to cec.h since cec.h no longer
includes cec-notifier.h. These headers included each other before,
which caused various problems.

Due to these changes the seco-cec driver was changed as well: it
should include cec-notifier.h, not cec.h.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 97 insertions, 1 deletions

diff --git a/include/media/cec.h b/include/media/cec.h
index 707411ef8ba2..4d59387bc61b 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -17,7 +17,9 @@
 #include <linux/timer.h>
 #include <linux/cec-funcs.h>
 #include <media/rc-core.h>
-#include <media/cec-notifier.h>
+
+/* CEC_ADAP_G_CONNECTOR_INFO is available */
+#define CEC_CAP_CONNECTOR_INFO	(1 << 8)
 
 #define CEC_CAP_DEFAULTS (CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT | \
 			  CEC_CAP_PASSTHROUGH | CEC_CAP_RC)
@@ -53,6 +55,7 @@ struct cec_devnode {
 struct cec_adapter;
 struct cec_data;
 struct cec_pin;
+struct cec_notifier;
 
 struct cec_data {
 	struct list_head list;
@@ -144,6 +147,34 @@ struct cec_adap_ops {
  */
 #define CEC_MAX_MSG_TX_QUEUE_SZ		(18 * 1)
 
+/**
+ * struct cec_drm_connector_info - tells which drm connector is
+ * associated with the CEC adapter.
+ * @card_no: drm card number
+ * @connector_id: drm connector ID
+ */
+struct cec_drm_connector_info {
+	__u32 card_no;
+	__u32 connector_id;
+};
+
+#define CEC_CONNECTOR_TYPE_NO_CONNECTOR	0
+#define CEC_CONNECTOR_TYPE_DRM		1
+
+/**
+ * struct cec_connector_info - tells if and which connector is
+ * associated with the CEC adapter.
+ * @type: connector type (if any)
+ * @drm: drm connector info
+ */
+struct cec_connector_info {
+	__u32 type;
+	union {
+		struct cec_drm_connector_info drm;
+		__u32 raw[16];
+	};
+};
+
 struct cec_adapter {
 	struct module *owner;
 	char name[32];
@@ -182,6 +213,7 @@ struct cec_adapter {
 	struct cec_fh *cec_initiator;
 	bool passthrough;
 	struct cec_log_addrs log_addrs;
+	struct cec_connector_info conn_info;
 
 	u32 tx_timeouts;
 
@@ -233,6 +265,7 @@ static inline bool cec_is_registered(const struct cec_adapter *adap)
 	((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf
 
 struct edid;
+struct drm_connector;
 
 #if IS_REACHABLE(CONFIG_CEC_CORE)
 struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
@@ -247,6 +280,8 @@ void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr,
 		     bool block);
 void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
 			       const struct edid *edid);
+void cec_s_conn_info(struct cec_adapter *adap,
+		     const struct cec_connector_info *conn_info);
 int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
 		     bool block);
 
@@ -331,6 +366,9 @@ void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts);
 u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
 			   unsigned int *offset);
 
+void cec_fill_conn_info_from_drm(struct cec_connector_info *conn_info,
+				 const struct drm_connector *connector);
+
 #else
 
 static inline int cec_register_adapter(struct cec_adapter *adap,
@@ -365,6 +403,64 @@ static inline u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
 	return CEC_PHYS_ADDR_INVALID;
 }
 
+static inline void cec_s_conn_info(struct cec_adapter *adap,
+				   const struct cec_connector_info *conn_info)
+{
+}
+
+static inline void
+cec_fill_conn_info_from_drm(struct cec_connector_info *conn_info,
+			    const struct drm_connector *connector)
+{
+	memset(conn_info, 0, sizeof(*conn_info));
+}
+
+#endif
+
+#if IS_REACHABLE(CONFIG_CEC_CORE) && IS_ENABLED(CONFIG_CEC_NOTIFIER)
+
+/**
+ * cec_notifier_register - register a callback with the notifier
+ * @n: the CEC notifier
+ * @adap: the CEC adapter, passed as argument to the callback function
+ * @callback: the callback function
+ */
+void cec_notifier_register(struct cec_notifier *n,
+			   struct cec_adapter *adap,
+			   void (*callback)(struct cec_adapter *adap, u16 pa));
+
+/**
+ * cec_notifier_unregister - unregister the callback from the notifier.
+ * @n: the CEC notifier
+ */
+void cec_notifier_unregister(struct cec_notifier *n);
+
+/**
+ * cec_register_cec_notifier - register the notifier with the cec adapter.
+ * @adap: the CEC adapter
+ * @notifier: the CEC notifier
+ */
+void cec_register_cec_notifier(struct cec_adapter *adap,
+			       struct cec_notifier *notifier);
+
+#else
+
+static inline void
+cec_notifier_register(struct cec_notifier *n,
+		      struct cec_adapter *adap,
+		      void (*callback)(struct cec_adapter *adap, u16 pa))
+{
+}
+
+static inline void cec_notifier_unregister(struct cec_notifier *n)
+{
+}
+
+static inline void cec_register_cec_notifier(struct cec_adapter *adap,
+					     struct cec_notifier *notifier)
+{
+}
+
 #endif
 
 /**