[media] cec: add cec_s_phys_addr_from_edid helper function

This function simplifies the integration of CEC in DRM drivers.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

include/media/cec.h

@@ -206,6 +206,8 @@ static inline bool cec_is_sink(const struct cec_adapter *adap)
 #define cec_phys_addr_exp(pa) \
 	((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf
 
+struct edid;
+
 #if IS_ENABLED(CONFIG_CEC_CORE)
 struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
 		void *priv, const char *name, u32 caps, u8 available_las);
@@ -217,6 +219,8 @@ int cec_s_log_addrs(struct cec_adapter *adap, struct cec_log_addrs *log_addrs,
 		    bool block);
 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);
 int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
 		     bool block);
 
@@ -326,6 +330,11 @@ static inline void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr,
 {
 }
 
+static inline void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
+					     const struct edid *edid)
+{
+}
+
 static inline u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
 					 unsigned int *offset)
 {