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media: v4l2-subdev: implement VIDIOC_DBG_G_CHIP_INFO ioctl

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The VIDIOC_DBG_G/S_REGISTER ioctls imply that VIDIOC_DBG_G_CHIP_INFO is also
present, since without that you cannot use v4l2-dbg.

Just like the implementation in v4l2-ioctl.c this can be implemented in the
core and no drivers need to be modified.

It also makes it possible for v4l2-compliance to properly test the
VIDIOC_DBG_G/S_REGISTER ioctls.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2018-02-03 08:24:44 -05:00 committed by Mauro Carvalho Chehab
parent 3103c7b4ad
commit f437a7cb87
1 changed files with 13 additions and 0 deletions
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13
drivers/media/v4l2-core/v4l2-subdev.c
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@ -263,6 +263,19 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
return -EPERM;
return v4l2_subdev_call(sd, core, s_register, p);
}
case VIDIOC_DBG_G_CHIP_INFO:
{
struct v4l2_dbg_chip_info *p = arg;
if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr)
return -EINVAL;
if (sd->ops->core && sd->ops->core->s_register)
p->flags |= V4L2_CHIP_FL_WRITABLE;
if (sd->ops->core && sd->ops->core->g_register)
p->flags |= V4L2_CHIP_FL_READABLE;
strlcpy(p->name, sd->name, sizeof(p->name));
return 0;
}
#endif
case VIDIOC_LOG_STATUS: {