[PATCH v3 21/29] media: rzg2l-cru: Use v4l2_subdev_get_frame_desc()

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 <[email protected]>
---
 .../platform/renesas/rzg2l-cru/rzg2l-video.c  | 27 +++++--------------
 1 file changed, 7 insertions(+), 20 deletions(-)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
index 91eda5034248..90c074527e01 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
@@ -11,6 +11,7 @@
  * Copyright (C) 2008 Magnus Damm
  */
 
+#include <linux/cleanup.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/pm_runtime.h>
@@ -438,31 +439,17 @@ void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru)
 
 static int rzg2l_cru_get_virtual_channel(struct rzg2l_cru_dev *cru)
 {
-	struct v4l2_mbus_frame_desc fd = { };
 	struct media_pad *remote_pad;
-	int ret;
 
 	remote_pad = media_pad_remote_pad_unique(&cru->ip.pads[RZG2L_CRU_IP_SINK]);
-	ret = v4l2_subdev_call(cru->ip.remote, pad, get_frame_desc, remote_pad->index, &fd);
-	if (ret < 0 && ret != -ENOIOCTLCMD) {
-		dev_err(cru->dev, "get_frame_desc failed on IP remote subdev\n");
-		return ret;
-	}
-	/* If remote subdev does not implement .get_frame_desc default to VC0. */
-	if (ret == -ENOIOCTLCMD)
-		return 0;
 
-	if (fd.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
-		dev_err(cru->dev, "get_frame_desc returned invalid bus type %d\n", fd.type);
-		return -EINVAL;
-	}
-
-	if (!fd.num_entries) {
-		dev_err(cru->dev, "get_frame_desc returned zero entries\n");
-		return -EINVAL;
-	}
+	struct v4l2_mbus_frame_desc *fd __free(v4l2_subdev_free_frame_desc) =
+		v4l2_subdev_get_frame_desc(cru->ip.remote, remote_pad->index,
+					   V4L2_MBUS_FRAME_DESC_TYPE_CSI2);
+	if (IS_ERR(fd))
+		return PTR_ERR(fd);
 
-	return fd.entry[0].bus.csi2.vc;
+	return fd->entry[0].bus.csi2.vc;
 }
 
 void rzg3e_cru_enable_interrupts(struct rzg2l_cru_dev *cru)
-- 
2.47.3