[PATCH 08/13] media: v4l2-subdev: Print early in v4l2_subdev_{enable,disable}_streams()

[Sakari Ailus <sakari.ailus@linux.intel.com>]

Print debug messages early in v4l2_subdev_enable_streams() and
v4l2_subdev_disable_streams(), before sanity checks take place. This can
help figuring out why something goes wrong, in driver development or
otherwise.

Also print the name of the sub-device where streaming is to be enabled or
disabled.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/v4l2-core/v4l2-subdev.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 5afdd9d548b5..6bc855058ca6 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -2273,6 +2273,9 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
 	bool use_s_stream;
 	int ret;
 
+	dev_dbg(dev, "enable streams %s:%u/%#llx\n", sd->entity.name, pad,
+		streams_mask);
+
 	/* A few basic sanity checks first. */
 	if (pad >= sd->entity.num_pads)
 		return -EINVAL;
@@ -2320,8 +2323,6 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
 		goto done;
 	}
 
-	dev_dbg(dev, "enable streams %u:%#llx\n", pad, streams_mask);
-
 	already_streaming = v4l2_subdev_is_streaming(sd);
 
 	if (!use_s_stream) {
@@ -2373,6 +2374,9 @@ int v4l2_subdev_disable_streams(struct v4l2_subdev *sd, u32 pad,
 	bool use_s_stream;
 	int ret;
 
+	dev_dbg(dev, "disable streams %s:%u/%#llx\n", sd->entity.name, pad,
+		streams_mask);
+
 	/* A few basic sanity checks first. */
 	if (pad >= sd->entity.num_pads)
 		return -EINVAL;
@@ -2420,8 +2424,6 @@ int v4l2_subdev_disable_streams(struct v4l2_subdev *sd, u32 pad,
 		goto done;
 	}
 
-	dev_dbg(dev, "disable streams %u:%#llx\n", pad, streams_mask);
-
 	if (!use_s_stream) {
 		/* Call the .disable_streams() operation. */
 		ret = v4l2_subdev_call(sd, pad, disable_streams, state, pad,
-- 
2.39.5