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docs: media: v4l2-ioctl.h: document two global variables

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The media kAPI has two global variables at v4l2-ioctl.h. Document
them.

Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <8ebe25ff579962fec09b586f00e77fae7802985f.1765894964.git.mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2025-12-16 15:26:14 +01:00 • committed by Jonathan Corbet
parent bdd1cf8784
commit bea467aa5d
1 changed files with 15 additions and 0 deletions
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15
include/media/v4l2-ioctl.h
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@ -663,7 +663,22 @@ void v4l_printk_ioctl(const char *prefix, unsigned int cmd);
struct video_device;
/* names for fancy debug output */
/**
* var v4l2_field_names - Helper array mapping ``V4L2_FIELD_*`` to strings.
*
* Specially when printing debug messages, it is interesting to output
* the field order at the V4L2 buffers. This array associates all possible
* values of field pix format from V4L2 API into a string.
*/
extern const char *v4l2_field_names[];
/**
* var v4l2_type_names - Helper array mapping ``V4L2_BUF_TYPE_*`` to strings.
*
* When printing debug messages, it is interesting to output the V4L2 buffer
* type number with a name that represents its content.
*/
extern const char *v4l2_type_names[];
#ifdef CONFIG_COMPAT