[media] tuner-core: add an input pad

Tuners actually have at least one connector on its input.

Add a PAD to connect it.
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-core/dvbdev.c

@@ -34,6 +34,9 @@
 #include <linux/mutex.h>
 #include "dvbdev.h"
 
+/* Due to enum tuner_pad_index */
+#include <media/tuner.h>
+
 static DEFINE_MUTEX(dvbdev_mutex);
 static int dvbdev_debug;
 
@@ -552,7 +555,7 @@ void dvb_create_media_graph(struct dvb_adapter *adap)
 	}
 
 	if (tuner && demod)
-		media_create_pad_link(tuner, 0, demod, 0, 0);
+		media_create_pad_link(tuner, TUNER_PAD_IF_OUTPUT, demod, 0, 0);
 
 	if (demod && demux)
 		media_create_pad_link(demod, 1, demux, 0, MEDIA_LNK_FL_ENABLED);

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

@@ -27,6 +27,9 @@
 #include <media/v4l2-common.h>
 #include <linux/mutex.h>
 
+/* Due to enum tuner_pad_index */
+#include <media/tuner.h>
+
 /*
  * 1 = General debug messages
  * 2 = USB handling
@@ -260,7 +263,7 @@ static void au0828_create_media_graph(struct au0828_dev *dev)
 		return;
 
 	if (tuner)
-		media_create_pad_link(tuner, 0, decoder, 0,
+		media_create_pad_link(tuner, TUNER_PAD_IF_OUTPUT, decoder, 0,
 				      MEDIA_LNK_FL_ENABLED);
 	media_create_pad_link(decoder, 1, &dev->vdev.entity, 0,
 			      MEDIA_LNK_FL_ENABLED);

drivers/media/usb/cx231xx/cx231xx-cards.c

@@ -1264,7 +1264,7 @@ static void cx231xx_create_media_graph(struct cx231xx *dev)
 		return;
 
 	if (tuner)
-		media_create_pad_link(tuner, 0, decoder, 0,
+		media_create_pad_link(tuner, TUNER_PAD_IF_OUTPUT, decoder, 0,
 					 MEDIA_LNK_FL_ENABLED);
 	media_create_pad_link(decoder, 1, &dev->vdev.entity, 0,
 				 MEDIA_LNK_FL_ENABLED);

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

@@ -134,8 +134,9 @@ struct tuner {
 	unsigned int        type; /* chip type id */
 	void                *config;
 	const char          *name;
+
 #if defined(CONFIG_MEDIA_CONTROLLER)
-	struct media_pad	pad;
+	struct media_pad	pad[TUNER_NUM_PADS];
 #endif
 };
 
@@ -695,11 +696,12 @@ static int tuner_probe(struct i2c_client *client,
 	/* Should be just before return */
 register_client:
 #if defined(CONFIG_MEDIA_CONTROLLER)
-	t->pad.flags = MEDIA_PAD_FL_SOURCE;
+	t->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
+	t->pad[TUNER_PAD_IF_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
 	t->sd.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_TUNER;
 	t->sd.entity.name = t->name;
 
-	ret = media_entity_init(&t->sd.entity, 1, &t->pad);
+	ret = media_entity_init(&t->sd.entity, TUNER_NUM_PADS, &t->pad[0]);
 	if (ret < 0) {
 		tuner_err("failed to initialize media entity!\n");
 		kfree(t);

include/media/tuner.h

@@ -21,6 +21,14 @@
 
 #include <linux/videodev2.h>
 
+/* Tuner PADs */
+/* FIXME: is this the right place for it? */
+enum tuner_pad_index {
+	TUNER_PAD_RF_INPUT,
+	TUNER_PAD_IF_OUTPUT,
+	TUNER_NUM_PADS
+};
+
 #define ADDR_UNSET (255)
 
 #define TUNER_TEMIC_PAL			0        /* 4002 FH5 (3X 7756, 9483) */