[v4l-utils PATCH/RFC v5 09/14] mediactl: libv4l2subdev: add support for comparing mbus formats

[Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>]

This patch adds a function for checking whether two mbus formats
are compatible.

Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 utils/media-ctl/libv4l2subdev.c |   34 ++++++++++++++++++++++++++++++++++
 utils/media-ctl/v4l2subdev.h    |   12 ++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/utils/media-ctl/libv4l2subdev.c b/utils/media-ctl/libv4l2subdev.c
index dfd3bd5..b9a924c 100644
--- a/utils/media-ctl/libv4l2subdev.c
+++ b/utils/media-ctl/libv4l2subdev.c
@@ -835,6 +835,40 @@ int v4l2_subdev_validate_v4l2_ctrl(struct media_device *media,
 	return 0;
 }
 
+int v4l2_subdev_format_compare(struct v4l2_mbus_framefmt *fmt1,
+				struct v4l2_mbus_framefmt *fmt2)
+{
+	if (fmt1 == NULL || fmt2 == NULL)
+		return 0;
+
+	if (fmt1->width != fmt2->width) {
+		printf("width mismatch\n");
+		return 0;
+	}
+
+	if (fmt1->height != fmt2->height) {
+		printf("height mismatch\n");
+		return 0;
+	}
+
+	if (fmt1->code != fmt2->code) {
+		printf("mbus code mismatch\n");
+		return 0;
+	}
+
+	if (fmt1->field != fmt2->field) {
+		printf("field mismatch\n");
+		return 0;
+	}
+
+	if (fmt1->colorspace != fmt2->colorspace) {
+		printf("colorspace mismatch\n");
+		return 0;
+	}
+
+	return 1;
+}
+
 bool v4l2_subdev_has_v4l2_control_redir(struct media_device *media,
 				  struct media_entity *entity,
 				  int ctrl_id)
diff --git a/utils/media-ctl/v4l2subdev.h b/utils/media-ctl/v4l2subdev.h
index 07f9697..2f74975 100644
--- a/utils/media-ctl/v4l2subdev.h
+++ b/utils/media-ctl/v4l2subdev.h
@@ -314,6 +314,18 @@ int v4l2_subdev_validate_v4l2_ctrl(struct media_device *media,
 				   __u32 ctrl_id);
 
 /**
+ * @brief Compare mbus formats
+ * @param fmt1 - 1st mbus format to compare.
+ * @param fmt2 - 2nd mbus format to compare.
+ *
+ * Check whether two mbus formats are compatible.
+ *
+ * @return 1 if formats are compatible, 0 otherwise.
+ */
+int v4l2_subdev_format_compare(struct v4l2_mbus_framefmt *fmt1,
+	struct v4l2_mbus_framefmt *fmt2);
+
+/**
  * @brief Check if there was a v4l2_control redirection defined for the entity
  * @param media - media device.
  * @param entity - subdev-device media entity.
-- 
1.7.9.5

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