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[media] v4l2-device.h: add v4l2_device_mask_ variants 

The v4l2_device_call_* defines filter subdevs based on the grp_id value.
But some drivers use a bitmask, so instead of filtering by grp_id == value,
you want to filter by grp_id & value.

Make variants of these defines to do this.

The 'has_op' define has been extended to have a grp_id argument as well, and
a mask variant has been added.

This extra argument required a change to go7007.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2016-04-03 17:44:16 -03:00 committed by Mauro Carvalho Chehab
parent bae4c757a5
commit 96655553e5
2 changed files with 55 additions and 2 deletions
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2
drivers/media/usb/go7007/go7007-v4l2.c
View File

@ -1125,7 +1125,7 @@ int go7007_v4l2_init(struct go7007 *go)
vdev->queue = &go->vidq;
video_set_drvdata(vdev, go);
vdev->v4l2_dev = &go->v4l2_dev;
if (!v4l2_device_has_op(&go->v4l2_dev, video, querystd))
if (!v4l2_device_has_op(&go->v4l2_dev, 0, video, querystd))
v4l2_disable_ioctl(vdev, VIDIOC_QUERYSTD);
if (!(go->board_info->flags & GO7007_BOARD_HAS_TUNER)) {
v4l2_disable_ioctl(vdev, VIDIOC_S_FREQUENCY);

55
include/media/v4l2-device.h
View File

@ -196,11 +196,64 @@ static inline void v4l2_subdev_notify(struct v4l2_subdev *sd,
##args); \
})
#define v4l2_device_has_op(v4l2_dev, o, f) \
/*
* Call the specified callback for all subdevs where grp_id & grpmsk != 0
* (if grpmsk == `0, then match them all). Ignore any errors. Note that you
* cannot add or delete a subdev while walking the subdevs list.
*/
#define v4l2_device_mask_call_all(v4l2_dev, grpmsk, o, f, args...) \
do { \
struct v4l2_subdev *__sd; \
\
__v4l2_device_call_subdevs_p(v4l2_dev, __sd, \
!(grpmsk) || (__sd->grp_id & (grpmsk)), o, f , \
##args); \
} while (0)
/*
* Call the specified callback for all subdevs where grp_id & grpmsk != 0
* (if grpmsk == `0, then match them all). If the callback returns an error
* other than 0 or -ENOIOCTLCMD, then return with that error code. Note that
* you cannot add or delete a subdev while walking the subdevs list.
*/
#define v4l2_device_mask_call_until_err(v4l2_dev, grpmsk, o, f, args...) \
({ \
struct v4l2_subdev *__sd; \
__v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \
!(grpmsk) || (__sd->grp_id & (grpmsk)), o, f , \
##args); \
})
/*
* Does any subdev with matching grpid (or all if grpid == 0) has the given
* op?
*/
#define v4l2_device_has_op(v4l2_dev, grpid, o, f) \
({ \
struct v4l2_subdev *__sd; \
bool __result = false; \
list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \
if ((grpid) && __sd->grp_id != (grpid)) \
continue; \
if (v4l2_subdev_has_op(__sd, o, f)) { \
__result = true; \
break; \
} \
} \
__result; \
})
/*
* Does any subdev with matching grpmsk (or all if grpmsk == 0) has the given
* op?
*/
#define v4l2_device_mask_has_op(v4l2_dev, grpmsk, o, f) \
({ \
struct v4l2_subdev *__sd; \
bool __result = false; \
list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \
if ((grpmsk) && !(__sd->grp_id & (grpmsk))) \
continue; \
if (v4l2_subdev_has_op(__sd, o, f)) { \
__result = true; \
break; \