[media] cec: improve debug messages

- use __func__ instead of writing the full function name
- drop debug message in cec_config_log_addr since the same information
  will be reported later
- use debug level 1 for errors and infrequent events, use level 2 for
  debugging CEC message traffic
- log when a transmit is retried, very useful to know when debugging
- debug messages now all start with lower case

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

drivers/media/cec/cec-adap.c

@@ -392,7 +392,7 @@ int cec_thread_func(void *_adap)
 			 * happen and is an indication of a faulty CEC adapter
 			 * driver, or the CEC bus is in some weird state.
 			 */
-			dprintk(0, "message %*ph timed out!\n",
+			dprintk(0, "%s: message %*ph timed out!\n", __func__,
 				adap->transmitting->msg.len,
 				adap->transmitting->msg.msg);
 			/* Just give up on this. */
@@ -468,7 +468,7 @@ void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
 	struct cec_msg *msg;
 	u64 ts = ktime_get_ns();
 
-	dprintk(2, "cec_transmit_done %02x\n", status);
+	dprintk(2, "%s: status %02x\n", __func__, status);
 	mutex_lock(&adap->lock);
 	data = adap->transmitting;
 	if (!data) {
@@ -477,7 +477,8 @@ void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
 		 * unplugged while the transmit is ongoing. Ignore this
 		 * transmit in that case.
 		 */
-		dprintk(1, "cec_transmit_done without an ongoing transmit!\n");
+		dprintk(1, "%s was called without an ongoing transmit!\n",
+			__func__);
 		goto unlock;
 	}
 
@@ -504,6 +505,12 @@ void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
 	    !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) {
 		/* Retry this message */
 		data->attempts--;
+		if (msg->timeout)
+			dprintk(2, "retransmit: %*ph (attempts: %d, wait for 0x%02x)\n",
+				msg->len, msg->msg, data->attempts, msg->reply);
+		else
+			dprintk(2, "retransmit: %*ph (attempts: %d)\n",
+				msg->len, msg->msg, data->attempts);
 		/* Add the message in front of the transmit queue */
 		list_add(&data->list, &adap->transmit_queue);
 		adap->transmit_queue_sz++;
@@ -911,7 +918,7 @@ void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg)
 	memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
 
 	mutex_lock(&adap->lock);
-	dprintk(2, "cec_received_msg: %*ph\n", msg->len, msg->msg);
+	dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
 
 	/* Check if this message was for us (directed or broadcast). */
 	if (!cec_msg_is_broadcast(msg))
@@ -1112,9 +1119,6 @@ static int cec_config_log_addr(struct cec_adapter *adap,
 	las->log_addr[idx] = log_addr;
 	las->log_addr_mask |= 1 << log_addr;
 	adap->phys_addrs[log_addr] = adap->phys_addr;
-
-	dprintk(2, "claimed addr %d (%d)\n", log_addr,
-		las->primary_device_type[idx]);
 	return 1;
 }
 
@@ -1300,7 +1304,7 @@ static int cec_config_thread_func(void *arg)
 		/* Report Physical Address */
 		cec_msg_report_physical_addr(&msg, adap->phys_addr,
 					     las->primary_device_type[i]);
-		dprintk(2, "config: la %d pa %x.%x.%x.%x\n",
+		dprintk(1, "config: la %d pa %x.%x.%x.%x\n",
 			las->log_addr[i],
 			cec_phys_addr_exp(adap->phys_addr));
 		cec_transmit_msg_fh(adap, &msg, NULL, false);
@@ -1534,12 +1538,12 @@ int __cec_s_log_addrs(struct cec_adapter *adap,
 		if (log_addrs->num_log_addrs == 2) {
 			if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_AUDIOSYSTEM) |
 					   (1 << CEC_LOG_ADDR_TYPE_TV)))) {
-				dprintk(1, "Two LAs is only allowed for audiosystem and TV\n");
+				dprintk(1, "two LAs is only allowed for audiosystem and TV\n");
 				return -EINVAL;
 			}
 			if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_PLAYBACK) |
 					   (1 << CEC_LOG_ADDR_TYPE_RECORD)))) {
-				dprintk(1, "An audiosystem/TV can only be combined with record or playback\n");
+				dprintk(1, "an audiosystem/TV can only be combined with record or playback\n");
 				return -EINVAL;
 			}
 		}
@@ -1653,7 +1657,7 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 	bool from_unregistered = init_laddr == 0xf;
 	struct cec_msg tx_cec_msg = { };
 
-	dprintk(1, "cec_receive_notify: %*ph\n", msg->len, msg->msg);
+	dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
 
 	/* If this is a CDC-Only device, then ignore any non-CDC messages */
 	if (cec_is_cdc_only(&adap->log_addrs) &&
@@ -1722,7 +1726,7 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 
 		if (!from_unregistered)
 			adap->phys_addrs[init_laddr] = pa;
-		dprintk(1, "Reported physical address %x.%x.%x.%x for logical address %d\n",
+		dprintk(1, "reported physical address %x.%x.%x.%x for logical address %d\n",
 			cec_phys_addr_exp(pa), init_laddr);
 		break;
 	}