[PATCH v5 10/10] [media] v4l: Forbid usage of V4L2_MBUS_FMT definitions inside the kernel

On Mon, 10 Nov 2014 12:09:19 +0100
Hans Verkuil [off-list ref] wrote:

On 11/08/2014 04:47 PM, Boris Brezillon wrote:

quoted

Place v4l2_mbus_pixelcode in a #ifndef __KERNEL__ section so that kernel
users don't have access to these definitions.

We have to keep this definition for user-space users even though they're
encouraged to move to the new media_bus_format enum.

Signed-off-by: Boris Brezillon <redacted>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 include/uapi/linux/v4l2-mediabus.h | 45 ++++++++++++++++++++++++--------------
 1 file changed, 28 insertions(+), 17 deletions(-)

diff --git a/include/uapi/linux/v4l2-mediabus.h b/include/uapi/linux/v4l2-mediabus.h
index d712df8..5c9410d 100644
--- a/include/uapi/linux/v4l2-mediabus.h
+++ b/include/uapi/linux/v4l2-mediabus.h

@@ -15,6 +15,33 @@
 #include <linux/types.h>
 #include <linux/videodev2.h>
 
+/**
+ * struct v4l2_mbus_framefmt - frame format on the media bus
+ * @width:	frame width
+ * @height:	frame height
+ * @code:	data format code (from enum v4l2_mbus_pixelcode)
+ * @field:	used interlacing type (from enum v4l2_field)
+ * @colorspace:	colorspace of the data (from enum v4l2_colorspace)
+ */
+struct v4l2_mbus_framefmt {
+	__u32			width;
+	__u32			height;
+	__u32			code;
+	__u32			field;
+	__u32			colorspace;
+	__u32			reserved[7];
+};
+
+#ifndef __KERNEL__
+/*
+ * enum v4l2_mbus_pixelcode and its definitions are now deprecated, and
+ * MEDIA_BUS_FMT_ definitions (defined in media-bus-format.h) should be
+ * used instead.
+ *
+ * New defines should only be added to media-bus-format.h. The
+ * v4l2_mbus_pixelcode enum is frozen.
+ */
+
 #define V4L2_MBUS_FROM_MEDIA_BUS_FMT(name)	\
 	MEDIA_BUS_FMT_ ## name = V4L2_MBUS_FMT_ ## name

Shouldn't this be the other way around?

  	V4L2_MBUS_FMT_ ## name = MEDIA_BUS_FMT_ ## name

Argh! Absolutely, I'll fix that.

Regards,

	Hans

quoted

@@ -102,22 +129,6 @@ enum v4l2_mbus_pixelcode {
 
 	V4L2_MBUS_FROM_MEDIA_BUS_FMT(AHSV8888_1X32),
 };
-
-/**
- * struct v4l2_mbus_framefmt - frame format on the media bus
- * @width:	frame width
- * @height:	frame height
- * @code:	data format code (from enum v4l2_mbus_pixelcode)
- * @field:	used interlacing type (from enum v4l2_field)
- * @colorspace:	colorspace of the data (from enum v4l2_colorspace)
- */
-struct v4l2_mbus_framefmt {
-	__u32			width;
-	__u32			height;
-	__u32			code;
-	__u32			field;
-	__u32			colorspace;
-	__u32			reserved[7];
-};
+#endif /* __KERNEL__ */
 
 #endif

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com