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V4L/DVB (5306): Add support for VIDIOC_G_CHIP_IDENT

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VIDIOC_G_CHIP_IDENT improves debugging of card problems: it can be
used to detect which chips are on the board and based on that information
selected register dumps can be made, making it easy to debug complicated
media chips containing tens or hundreds of registers.
This ioctl replaces the internal VIDIOC_INT_G_CHIP_IDENT ioctl.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2007-04-27 12:31:08 -03:00 • committed by Mauro Carvalho Chehab
parent ced80c67cd
commit 3434eb7e14
12 changed files with 130 additions and 57 deletions
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10
include/linux/videodev2.h
View file

@ -1398,6 +1398,14 @@ struct v4l2_register {
__u64 val;
};
/* VIDIOC_G_CHIP_IDENT */
struct v4l2_chip_ident {
__u32 match_type; /* Match type */
__u32 match_chip; /* Match this chip, meaning determined by match_type */
__u32 ident; /* chip identifier as specified in <media/v4l2-chip-ident.h> */
__u32 revision; /* chip revision, chip specific */
};
/*
* I O C T L C O D E S F O R V I D E O D E V I C E S
*
@ -1471,6 +1479,8 @@ struct v4l2_register {
/* Experimental, only implemented if CONFIG_VIDEO_ADV_DEBUG is defined */
#define VIDIOC_DBG_S_REGISTER _IOW ('V', 79, struct v4l2_register)
#define VIDIOC_DBG_G_REGISTER _IOWR ('V', 80, struct v4l2_register)
#define VIDIOC_G_CHIP_IDENT _IOWR ('V', 81, struct v4l2_chip_ident)
#endif
#ifdef __OLD_VIDIOC_