media: mc: Make media_get_pad_index() use pad type flag

Use the pad flag specifying the pad type instead of a boolean in
preparation for internal source pads.

Also make the loop variable unsigned.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/dvb-core/dvbdev.c

@@ -730,7 +730,7 @@ int dvb_create_media_graph(struct dvb_adapter *adap,
 						     MEDIA_LNK_FL_ENABLED,
 						     false);
 		} else {
-			pad_sink = media_get_pad_index(tuner, true,
+			pad_sink = media_get_pad_index(tuner, MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_ANALOG);
 			if (pad_sink < 0)
 				return -EINVAL;
@@ -748,7 +748,7 @@ int dvb_create_media_graph(struct dvb_adapter *adap,
 
 	if (ntuner && ndemod) {
 		/* NOTE: first found tuner source pad presumed correct */
-		pad_source = media_get_pad_index(tuner, false,
+		pad_source = media_get_pad_index(tuner, MEDIA_PAD_FL_SOURCE,
 						 PAD_SIGNAL_ANALOG);
 		if (pad_source < 0)
 			return -EINVAL;

drivers/media/mc/mc-entity.c

@@ -1052,25 +1052,19 @@ static void __media_entity_remove_link(struct media_entity *entity,
 	kfree(link);
 }
 
-int media_get_pad_index(struct media_entity *entity, bool is_sink,
+int media_get_pad_index(struct media_entity *entity, u32 pad_type,
 			enum media_pad_signal_type sig_type)
 {
-	int i;
-	bool pad_is_sink;
+	unsigned int i;
 
 	if (!entity)
 		return -EINVAL;
 
 	for (i = 0; i < entity->num_pads; i++) {
-		if (entity->pads[i].flags & MEDIA_PAD_FL_SINK)
-			pad_is_sink = true;
-		else if (entity->pads[i].flags & MEDIA_PAD_FL_SOURCE)
-			pad_is_sink = false;
-		else
-			continue;	/* This is an error! */
-
-		if (pad_is_sink != is_sink)
+		if ((entity->pads[i].flags &
+		     (MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_SOURCE)) != pad_type)
 			continue;
+
 		if (entity->pads[i].sig_type == sig_type)
 			return i;
 	}

drivers/media/usb/au0828/au0828-core.c

@@ -250,7 +250,7 @@ static void au0828_media_graph_notify(struct media_entity *new,
 
 create_link:
 	if (decoder && mixer) {
-		ret = media_get_pad_index(decoder, false,
+		ret = media_get_pad_index(decoder, MEDIA_PAD_FL_SOURCE,
 					  PAD_SIGNAL_AUDIO);
 		if (ret >= 0)
 			ret = media_create_pad_link(decoder, ret,

drivers/media/v4l2-core/v4l2-mc.c

@@ -105,9 +105,11 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 	/* Link the tuner and IF video output pads */
 	if (tuner) {
 		if (if_vid) {
-			pad_source = media_get_pad_index(tuner, false,
+			pad_source = media_get_pad_index(tuner,
+							 MEDIA_PAD_FL_SOURCE,
 							 PAD_SIGNAL_ANALOG);
-			pad_sink = media_get_pad_index(if_vid, true,
+			pad_sink = media_get_pad_index(if_vid,
+						       MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_ANALOG);
 			if (pad_source < 0 || pad_sink < 0) {
 				dev_warn(mdev->dev, "Couldn't get tuner and/or PLL pad(s): (%d, %d)\n",
@@ -122,9 +124,11 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 				return ret;
 			}
 
-			pad_source = media_get_pad_index(if_vid, false,
+			pad_source = media_get_pad_index(if_vid,
+							 MEDIA_PAD_FL_SOURCE,
 							 PAD_SIGNAL_ANALOG);
-			pad_sink = media_get_pad_index(decoder, true,
+			pad_sink = media_get_pad_index(decoder,
+						       MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_ANALOG);
 			if (pad_source < 0 || pad_sink < 0) {
 				dev_warn(mdev->dev, "get decoder and/or PLL pad(s): (%d, %d)\n",
@@ -139,9 +143,11 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 				return ret;
 			}
 		} else {
-			pad_source = media_get_pad_index(tuner, false,
+			pad_source = media_get_pad_index(tuner,
+							 MEDIA_PAD_FL_SOURCE,
 							 PAD_SIGNAL_ANALOG);
-			pad_sink = media_get_pad_index(decoder, true,
+			pad_sink = media_get_pad_index(decoder,
+						       MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_ANALOG);
 			if (pad_source < 0 || pad_sink < 0) {
 				dev_warn(mdev->dev, "couldn't get tuner and/or decoder pad(s): (%d, %d)\n",
@@ -156,9 +162,11 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 		}
 
 		if (if_aud) {
-			pad_source = media_get_pad_index(tuner, false,
+			pad_source = media_get_pad_index(tuner,
+							 MEDIA_PAD_FL_SOURCE,
 							 PAD_SIGNAL_AUDIO);
-			pad_sink = media_get_pad_index(if_aud, true,
+			pad_sink = media_get_pad_index(if_aud,
+						       MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_AUDIO);
 			if (pad_source < 0 || pad_sink < 0) {
 				dev_warn(mdev->dev, "couldn't get tuner and/or decoder pad(s) for audio: (%d, %d)\n",
@@ -180,7 +188,8 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 
 	/* Create demod to V4L, VBI and SDR radio links */
 	if (io_v4l) {
-		pad_source = media_get_pad_index(decoder, false, PAD_SIGNAL_DV);
+		pad_source = media_get_pad_index(decoder, MEDIA_PAD_FL_SOURCE,
+						 PAD_SIGNAL_DV);
 		if (pad_source < 0) {
 			dev_warn(mdev->dev, "couldn't get decoder output pad for V4L I/O\n");
 			return -EINVAL;
@@ -195,7 +204,8 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 	}
 
 	if (io_swradio) {
-		pad_source = media_get_pad_index(decoder, false, PAD_SIGNAL_DV);
+		pad_source = media_get_pad_index(decoder, MEDIA_PAD_FL_SOURCE,
+						 PAD_SIGNAL_DV);
 		if (pad_source < 0) {
 			dev_warn(mdev->dev, "couldn't get decoder output pad for SDR\n");
 			return -EINVAL;
@@ -210,7 +220,8 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 	}
 
 	if (io_vbi) {
-		pad_source = media_get_pad_index(decoder, false, PAD_SIGNAL_DV);
+		pad_source = media_get_pad_index(decoder, MEDIA_PAD_FL_SOURCE,
+						 PAD_SIGNAL_DV);
 		if (pad_source < 0) {
 			dev_warn(mdev->dev, "couldn't get decoder output pad for VBI\n");
 			return -EINVAL;
@@ -231,7 +242,7 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 		case MEDIA_ENT_F_CONN_RF:
 			if (!tuner)
 				continue;
-			pad_sink = media_get_pad_index(tuner, true,
+			pad_sink = media_get_pad_index(tuner, MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_ANALOG);
 			if (pad_sink < 0) {
 				dev_warn(mdev->dev, "couldn't get tuner analog pad sink\n");
@@ -243,7 +254,8 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 			break;
 		case MEDIA_ENT_F_CONN_SVIDEO:
 		case MEDIA_ENT_F_CONN_COMPOSITE:
-			pad_sink = media_get_pad_index(decoder, true,
+			pad_sink = media_get_pad_index(decoder,
+						       MEDIA_PAD_FL_SINK,
 						       PAD_SIGNAL_ANALOG);
 			if (pad_sink < 0) {
 				dev_warn(mdev->dev, "couldn't get decoder analog pad sink\n");

include/media/media-entity.h

@@ -741,7 +741,7 @@ static inline void media_entity_cleanup(struct media_entity *entity) {}
  * media_get_pad_index() - retrieves a pad index from an entity
  *
  * @entity:	entity where the pads belong
- * @is_sink:	true if the pad is a sink, false if it is a source
+ * @pad_type:	the type of the pad, one of MEDIA_PAD_FL_* pad types
  * @sig_type:	type of signal of the pad to be search
  *
  * This helper function finds the first pad index inside an entity that
@@ -752,7 +752,7 @@ static inline void media_entity_cleanup(struct media_entity *entity) {}
  * On success, return the pad number. If the pad was not found or the media
  * entity is a NULL pointer, return -EINVAL.
  */
-int media_get_pad_index(struct media_entity *entity, bool is_sink,
+int media_get_pad_index(struct media_entity *entity, u32 pad_type,
 			enum media_pad_signal_type sig_type);
 
 /**