media: rc: per-protocol repeat period and minimum keyup timer

Each IR protocol has its own repeat period. We can minimise the keyup
timer to be the protocol period + IR timeout. This makes keys less
"sticky" and makes IR more reactive and nicer to use.

This feature was previously attempted in commit d57ea877af ("media: rc:
per-protocol repeat period"), but that did not take the IR timeout into
account, and had to be reverted.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/cec/cec-core.c

@@ -322,7 +322,7 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
 	adap->rc->allowed_protocols = RC_PROTO_BIT_CEC;
 	adap->rc->priv = adap;
 	adap->rc->map_name = RC_MAP_CEC;
-	adap->rc->timeout = MS_TO_NS(100);
+	adap->rc->timeout = MS_TO_NS(550);
 #endif
 	return adap;
 }