diff options
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-ctrls.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index f40003550b60..631cdc0e0bda 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -1687,7 +1687,8 @@ EXPORT_SYMBOL(v4l2_ctrl_add_ctrl); /* Add the controls from another handler to our own. */ int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, - struct v4l2_ctrl_handler *add) + struct v4l2_ctrl_handler *add, + bool (*filter)(const struct v4l2_ctrl *ctrl)) { struct v4l2_ctrl_ref *ref; int ret = 0; @@ -1707,6 +1708,9 @@ int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, /* And control classes */ if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) continue; + /* Filter any unwanted controls */ + if (filter && !filter(ctrl)) + continue; ret = handler_new_ref(hdl, ctrl); if (ret) break; @@ -1716,6 +1720,25 @@ int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, } EXPORT_SYMBOL(v4l2_ctrl_add_handler); +bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl) +{ + if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX) + return true; + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + case V4L2_CID_AUDIO_VOLUME: + case V4L2_CID_AUDIO_BALANCE: + case V4L2_CID_AUDIO_BASS: + case V4L2_CID_AUDIO_TREBLE: + case V4L2_CID_AUDIO_LOUDNESS: + return true; + default: + break; + } + return false; +} +EXPORT_SYMBOL(v4l2_ctrl_radio_filter); + /* Cluster controls */ void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls) { |
