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media: v4l2: Make colorspace validity checks more future-proof

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The helper functions that test validity of colorspace-related fields
use the last value of the corresponding enums. This isn't very
future-proof, as there's a high chance someone adding a new value may
forget to update the helpers. Add new "LAST" entries to the enumerations
to improve this, and keep them private to the kernel.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Laurent Pinchart 2022-03-17 12:37:12 +00:00 • committed by Mauro Carvalho Chehab
parent b0afed239a
commit 718d2153ad
2 changed files with 25 additions and 3 deletions
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22
include/uapi/linux/videodev2.h
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@ -245,6 +245,14 @@ enum v4l2_colorspace {
/* DCI-P3 colorspace, used by cinema projectors */
V4L2_COLORSPACE_DCI_P3 = 12,
#ifdef __KERNEL__
/*
* Largest supported colorspace value, assigned by the compiler, used
* by the framework to check for invalid values.
*/
V4L2_COLORSPACE_LAST,
#endif
};
/*
@ -283,6 +291,13 @@ enum v4l2_xfer_func {
V4L2_XFER_FUNC_NONE = 5,
V4L2_XFER_FUNC_DCI_P3 = 6,
V4L2_XFER_FUNC_SMPTE2084 = 7,
#ifdef __KERNEL__
/*
* Largest supported transfer function value, assigned by the compiler,
* used by the framework to check for invalid values.
*/
V4L2_XFER_FUNC_LAST,
#endif
};
/*
@ -343,6 +358,13 @@ enum v4l2_ycbcr_encoding {
/* SMPTE 240M -- Obsolete HDTV */
V4L2_YCBCR_ENC_SMPTE240M = 8,
#ifdef __KERNEL__
/*
* Largest supported encoding value, assigned by the compiler, used by
* the framework to check for invalid values.
*/
V4L2_YCBCR_ENC_LAST,
#endif
};
/*