[PATCH 19/20] lib: image-formats: Add more functions

[Maxime Ripard]

V4L2 drivers typically need a few more helpers compared to DRM drivers, so
let's add them.

Signed-off-by: Maxime Ripard <maxime.ripard at bootlin.com>
---
 include/linux/image-formats.h | 42 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+)

diff --git a/include/linux/image-formats.h b/include/linux/image-formats.h
index b78b8e861fc9..a2cf3528bd31 100644
--- a/include/linux/image-formats.h
+++ b/include/linux/image-formats.h
@@ -388,6 +388,48 @@ uint64_t image_format_info_min_pitch(const struct image_format_info *info,
 			    image_format_info_block_height(info, plane));
 }
 
+/**
+ * image_format_info_plane_stride - determine the stride value
+ * @format: pointer to the image_format_info
+ * @width: plane width
+ * @plane: plane index
+ *
+ * Returns:
+ * The bytes per pixel value for the specified plane.
+ */
+static inline
+unsigned int image_format_info_plane_stride(const struct image_format_info *format,
+					    unsigned int width, int plane)
+{
+	if (!format || plane >= format->num_planes)
+		return 0;
+
+	return image_format_info_plane_width(format, width, plane) *
+		image_format_info_plane_cpp(format, plane);
+}
+
+/**
+ * image_format_info_plane_size - determine the size value
+ * @format: pointer to the image_format_info
+ * @width: plane width
+ * @height: plane width
+ * @plane: plane index
+ *
+ * Returns:
+ * The size of the plane buffer.
+ */
+static inline
+unsigned int image_format_info_plane_size(const struct image_format_info *format,
+					  unsigned int width, unsigned int height,
+					  int plane)
+{
+	if (!format || plane >= format->num_planes)
+		return 0;
+
+	return image_format_info_plane_stride(format, width, plane) *
+		image_format_info_plane_height(format, height, plane);
+}
+
 const struct image_format_info *__image_format_drm_lookup(u32 drm);
 const struct image_format_info *__image_format_v4l2_lookup(u32 v4l2);
 const struct image_format_info *image_format_drm_lookup(u32 drm);
-- 
git-series 0.9.1