[PATCH 09/17] media: bcm2835-unicam: Use v4l2_subdev_get_frame_desc()

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

Call v4l2_subdev_get_frame_desc() to obtain the frame descriptor. This is
preferred over calling the get_frame_desc() pad operation directly.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 .../media/platform/broadcom/bcm2835-unicam.c  | 20 +++++++++----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/media/platform/broadcom/bcm2835-unicam.c b/drivers/media/platform/broadcom/bcm2835-unicam.c
index 8d28ba0b59a3..2e78b16bf18c 100644
--- a/drivers/media/platform/broadcom/bcm2835-unicam.c
+++ b/drivers/media/platform/broadcom/bcm2835-unicam.c
@@ -888,7 +888,8 @@ static int unicam_get_image_vc_dt(struct unicam_device *unicam,
 				  struct v4l2_subdev_state *state,
 				  u8 *vc, u8 *dt)
 {
-	struct v4l2_mbus_frame_desc fd;
+	struct v4l2_mbus_frame_desc *fd __free(v4l2_subdev_free_frame_desc) =
+		NULL;
 	u32 stream;
 	int ret;
 
@@ -898,17 +899,14 @@ static int unicam_get_image_vc_dt(struct unicam_device *unicam,
 	if (ret)
 		return ret;
 
-	ret = v4l2_subdev_call(unicam->sensor.subdev, pad, get_frame_desc,
-			       unicam->sensor.pad->index, &fd);
-	if (ret)
-		return ret;
-
-	/* Only CSI-2 supports DTs. */
-	if (fd.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2)
-		return -EINVAL;
+	fd = v4l2_subdev_get_frame_desc(unicam->sensor.subdev,
+					unicam->sensor.pad->index,
+					V4L2_MBUS_FRAME_DESC_TYPE_CSI2);
+	if (IS_ERR(fd))
+		return PTR_ERR(fd);
 
-	for (unsigned int i = 0; i < fd.num_entries; ++i) {
-		const struct v4l2_mbus_frame_desc_entry *fde = &fd.entry[i];
+	for (unsigned int i = 0; i < fd->num_entries; ++i) {
+		const struct v4l2_mbus_frame_desc_entry *fde = &fd->entry[i];
 
 		if (fde->stream == stream) {
 			*vc = fde->bus.csi2.vc;
-- 
2.47.3