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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2018-02-03 08:24:44 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-02-26 09:33:39 -0500 |
| commit | f437a7cb87b2814bba4f334fe97d0f02e7ed6079 (patch) | |
| tree | 4ae1c1b18af732473e3ead3bc530bd4036e9ec8d /drivers/media/v4l2-core/v4l2-subdev.c | |
| parent | 3103c7b4ad08d813ec5c8187f7a9ddea55acf027 (diff) | |
| download | lwn-f437a7cb87b2814bba4f334fe97d0f02e7ed6079.tar.gz lwn-f437a7cb87b2814bba4f334fe97d0f02e7ed6079.zip | |
media: v4l2-subdev: implement VIDIOC_DBG_G_CHIP_INFO ioctl
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>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-subdev.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index ec0bd6411aa7..f9eed938d348 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -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: { |