The tuner->decoder needs to be enabled when we're about to
start streaming.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
diff --git a/drivers/media/usb/cx231xx/cx231xx-video.c b/drivers/media/usb/cx231xx/cx231xx-video.c
index f3d1a488dfa7..634763535d60 100644
--- a/drivers/media/usb/cx231xx/cx231xx-video.c
+++ b/drivers/media/usb/cx231xx/cx231xx-video.c
@@ -703,6 +703,74 @@ static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf)
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
+static int cx231xx_enable_analog_tuner(struct cx231xx *dev)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER
+ struct media_device *mdev = dev->media_dev;
+ struct media_entity *entity, *decoder = NULL, *source;
+ struct media_link *link, *found_link = NULL;
+ int i, ret, active_links = 0;
+
+ if (!mdev)
+ return 0;
+
+/*
+ * This will find the tuner that it is connected into the decoder.
+ * Technically, this is not 100% correct, as the device may be using an
+ * analog input instead of the tuner. However, we can't use the DVB for dvb
+ * while the DMA engine is being used for V4L2.
+ */
+ media_device_for_each_entity(entity, mdev) {
+ if (entity->type == MEDIA_ENT_T_V4L2_SUBDEV_DECODER) {
+ decoder = entity;
+ break;
+ }
+ }
+ if (!decoder)
+ return 0;
+
+ for (i = 0; i < decoder->num_links; i++) {
+ link = &decoder->links[i];
+ if (link->sink->entity == decoder) {
+ found_link = link;
+ if (link->flags & MEDIA_LNK_FL_ENABLED)
+ active_links++;
+ break;
+ }
+ }
+
+ if (active_links == 1 || !found_link)
+ return 0;
+
+ source = found_link->source->entity;
+ for (i = 0; i < source->num_links; i++) {
+ struct media_entity *sink;
+ int flags = 0;
+
+ link = &source->links[i];
+ sink = link->sink->entity;
+
+ if (sink == entity)
+ flags = MEDIA_LNK_FL_ENABLED;
+
+ ret = media_entity_setup_link(link, flags);
+ if (ret) {
+ dev_err(dev->dev,
+ "Couldn't change link %s->%s to %s. Error %d\n",
+ source->name, sink->name,
+ flags ? "enabled" : "disabled",
+ ret);
+ return ret;
+ } else
+ dev_dbg(dev->dev,
+ "link %s->%s was %s\n",
+ source->name, sink->name,
+ flags ? "ENABLED" : "disabled");
+ }
+#endif
+ return 0;
+}
+
static int
buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
enum v4l2_field field)
@@ -756,6 +824,9 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
}
buf->vb.state = VIDEOBUF_PREPARED;
+
+ cx231xx_enable_analog_tuner(dev);
+
return 0;
fail:
--
2.1.0
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