[PATCH 04/18] media: v4l: async: Make V4L2 async match information a struct

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

Make V4L2 async match information a struct, making it easier to use it
elsewhere outside the scope of struct v4l2_async_subdev.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/v4l2-core/v4l2-async.c  | 18 ++++++-------
 drivers/media/v4l2-core/v4l2-fwnode.c |  2 +-
 include/media/v4l2-async.h            | 39 ++++++++++++++++-----------
 3 files changed, 33 insertions(+), 26 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 13fe0bdc70b6..bb78e3618ab5 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -147,7 +147,7 @@ v4l2_async_find_match(struct v4l2_async_notifier *notifier,
 
 	list_for_each_entry(asd, &notifier->waiting, list) {
 		/* bus_type has been verified valid before */
-		switch (asd->match_type) {
+		switch (asd->match.type) {
 		case V4L2_ASYNC_MATCH_I2C:
 			match = match_i2c;
 			break;
@@ -172,10 +172,10 @@ v4l2_async_find_match(struct v4l2_async_notifier *notifier,
 static bool asd_equal(struct v4l2_async_subdev *asd_x,
 		      struct v4l2_async_subdev *asd_y)
 {
-	if (asd_x->match_type != asd_y->match_type)
+	if (asd_x->match.type != asd_y->match.type)
 		return false;
 
-	switch (asd_x->match_type) {
+	switch (asd_x->match.type) {
 	case V4L2_ASYNC_MATCH_I2C:
 		return asd_x->match.i2c.adapter_id ==
 			asd_y->match.i2c.adapter_id &&
@@ -494,7 +494,7 @@ static int v4l2_async_nf_asd_valid(struct v4l2_async_notifier *notifier,
 	if (!asd)
 		return -EINVAL;
 
-	switch (asd->match_type) {
+	switch (asd->match.type) {
 	case V4L2_ASYNC_MATCH_I2C:
 	case V4L2_ASYNC_MATCH_FWNODE:
 		if (v4l2_async_nf_has_async_subdev(notifier, asd, this_index)) {
@@ -504,7 +504,7 @@ static int v4l2_async_nf_asd_valid(struct v4l2_async_notifier *notifier,
 		break;
 	default:
 		dev_err(dev, "Invalid match type %u on %p\n",
-			asd->match_type, asd);
+			asd->match.type, asd);
 		return -EINVAL;
 	}
 
@@ -630,7 +630,7 @@ static void __v4l2_async_nf_cleanup(struct v4l2_async_notifier *notifier)
 		return;
 
 	list_for_each_entry_safe(asd, tmp, &notifier->asd_list, asd_list) {
-		switch (asd->match_type) {
+		switch (asd->match.type) {
 		case V4L2_ASYNC_MATCH_FWNODE:
 			fwnode_handle_put(asd->match.fwnode);
 			break;
@@ -685,7 +685,7 @@ __v4l2_async_nf_add_fwnode(struct v4l2_async_notifier *notifier,
 	if (!asd)
 		return ERR_PTR(-ENOMEM);
 
-	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+	asd->match.type = V4L2_ASYNC_MATCH_FWNODE;
 	asd->match.fwnode = fwnode_handle_get(fwnode);
 
 	ret = __v4l2_async_nf_add_subdev(notifier, asd);
@@ -732,7 +732,7 @@ __v4l2_async_nf_add_i2c(struct v4l2_async_notifier *notifier, int adapter_id,
 	if (!asd)
 		return ERR_PTR(-ENOMEM);
 
-	asd->match_type = V4L2_ASYNC_MATCH_I2C;
+	asd->match.type = V4L2_ASYNC_MATCH_I2C;
 	asd->match.i2c.adapter_id = adapter_id;
 	asd->match.i2c.address = address;
 
@@ -850,7 +850,7 @@ EXPORT_SYMBOL(v4l2_async_unregister_subdev);
 static void print_waiting_subdev(struct seq_file *s,
 				 struct v4l2_async_subdev *asd)
 {
-	switch (asd->match_type) {
+	switch (asd->match.type) {
 	case V4L2_ASYNC_MATCH_I2C:
 		seq_printf(s, " [i2c] dev=%d-%04x\n", asd->match.i2c.adapter_id,
 			   asd->match.i2c.address);
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index 3d9533c1b202..e6bd63364bed 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -811,7 +811,7 @@ v4l2_async_nf_fwnode_parse_endpoint(struct device *dev,
 	if (!asd)
 		return -ENOMEM;
 
-	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+	asd->match.type = V4L2_ASYNC_MATCH_FWNODE;
 	asd->match.fwnode =
 		fwnode_graph_get_remote_port_parent(endpoint);
 	if (!asd->match.fwnode) {
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index 25eb1d138c06..0c4cffd081c9 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -34,23 +34,38 @@ enum v4l2_async_match_type {
 };
 
 /**
- * struct v4l2_async_subdev - sub-device descriptor, as known to a bridge
+ * struct v4l2_async_match - async sub-device match information
  *
- * @match_type:	type of match that will be used
- * @match:	union of per-bus type matching data sets
- * @match.fwnode:
+ * @type:	type of match that will be used
+ * @fwnode:
  *		pointer to &struct fwnode_handle to be matched.
  *		Used if @match_type is %V4L2_ASYNC_MATCH_FWNODE.
- * @match.i2c:	embedded struct with I2C parameters to be matched.
+ * @i2c:	embedded struct with I2C parameters to be matched.
  *		Both @match.i2c.adapter_id and @match.i2c.address
  *		should be matched.
  *		Used if @match_type is %V4L2_ASYNC_MATCH_I2C.
- * @match.i2c.adapter_id:
+ * @i2c.adapter_id:
  *		I2C adapter ID to be matched.
  *		Used if @match_type is %V4L2_ASYNC_MATCH_I2C.
- * @match.i2c.address:
+ * @i2c.address:
  *		I2C address to be matched.
  *		Used if @match_type is %V4L2_ASYNC_MATCH_I2C.
+ */
+struct v4l2_async_match {
+	enum v4l2_async_match_type type;
+	union {
+		struct fwnode_handle *fwnode;
+		struct {
+			int adapter_id;
+			unsigned short address;
+		} i2c;
+	};
+};
+
+/**
+ * struct v4l2_async_subdev - sub-device descriptor, as known to a bridge
+ *
+ * @match:	struct of match type and per-bus type matching data sets
  * @asd_list:	used to add struct v4l2_async_subdev objects to the
  *		master notifier @asd_list
  * @list:	used to link struct v4l2_async_subdev objects, waiting to be
@@ -61,15 +76,7 @@ enum v4l2_async_match_type {
  * v4l2_async_subdev as its first member.
  */
 struct v4l2_async_subdev {
-	enum v4l2_async_match_type match_type;
-	union {
-		struct fwnode_handle *fwnode;
-		struct {
-			int adapter_id;
-			unsigned short address;
-		} i2c;
-	} match;
-
+	struct v4l2_async_match match;
 	/* v4l2-async core private: not to be used by drivers */
 	struct list_head list;
 	struct list_head asd_list;
-- 
2.30.2