media: cec: expose the new connector info API

Until now the connector info API was a kernel-internal API only.
This moves it to the public API and adds the new ioctl to retrieve
this information.

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>

2 files changed, 40 insertions, 31 deletions

diff --git a/include/media/cec.h b/include/media/cec.h
index 4d59387bc61b..0a4f69cc9dd4 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -18,9 +18,6 @@
 #include <linux/cec-funcs.h>
 #include <media/rc-core.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)
 
@@ -147,34 +144,6 @@ 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];
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index 7a5d843af8c9..7d1a06c52469 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -317,6 +317,8 @@ static inline int cec_is_unconfigured(__u16 log_addr_mask)
 #define CEC_CAP_NEEDS_HPD	(1 << 6)
 /* Hardware can monitor CEC pin transitions */
 #define CEC_CAP_MONITOR_PIN	(1 << 7)
+/* CEC_ADAP_G_CONNECTOR_INFO is available */
+#define CEC_CAP_CONNECTOR_INFO	(1 << 8)
 
 /**
  * struct cec_caps - CEC capabilities structure.
@@ -375,6 +377,34 @@ struct cec_log_addrs {
 /* CDC-Only device: supports only CDC messages */
 #define CEC_LOG_ADDRS_FL_CDC_ONLY		(1 << 2)
 
+/**
+ * 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];
+	};
+};
+
 /* Events */
 
 /* Event that occurs when the adapter state changes */
@@ -398,10 +428,17 @@ struct cec_log_addrs {
  * struct cec_event_state_change - used when the CEC adapter changes state.
  * @phys_addr: the current physical address
  * @log_addr_mask: the current logical address mask
+ * @have_conn_info: if non-zero, then HDMI connector information is available.
+ *	This field is only valid if CEC_CAP_CONNECTOR_INFO is set. If that
+ *	capability is set and @have_conn_info is zero, then that indicates
+ *	that the HDMI connector device is not instantiated, either because
+ *	the HDMI driver is still configuring the device or because the HDMI
+ *	device was unbound.
  */
 struct cec_event_state_change {
 	__u16 phys_addr;
 	__u16 log_addr_mask;
+	__u16 have_conn_info;
 };
 
 /**
@@ -476,6 +513,9 @@ struct cec_event {
 #define CEC_G_MODE		_IOR('a',  8, __u32)
 #define CEC_S_MODE		_IOW('a',  9, __u32)
 
+/* Get the connector info */
+#define CEC_ADAP_G_CONNECTOR_INFO _IOR('a',  10, struct cec_connector_info)
+
 /*
  * The remainder of this header defines all CEC messages and operands.
  * The format matters since it the cec-ctl utility parses it to generate