diff options
| -rw-r--r-- | Documentation/video4linux/v4l2-controls.txt | 6 | ||||
| -rw-r--r-- | drivers/media/pci/cx88/cx88-blackbird.c | 2 | ||||
| -rw-r--r-- | drivers/media/pci/cx88/cx88-video.c | 2 | ||||
| -rw-r--r-- | drivers/media/platform/s5p-fimc/fimc-capture.c | 2 | ||||
| -rw-r--r-- | drivers/media/platform/soc_camera/soc_camera.c | 2 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 25 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-device.c | 2 | ||||
| -rw-r--r-- | include/media/v4l2-ctrls.h | 18 |
8 files changed, 50 insertions, 9 deletions
diff --git a/Documentation/video4linux/v4l2-controls.txt b/Documentation/video4linux/v4l2-controls.txt index 43da22b89728..54270df99d5c 100644 --- a/Documentation/video4linux/v4l2-controls.txt +++ b/Documentation/video4linux/v4l2-controls.txt @@ -594,7 +594,11 @@ handler and finally add the first handler to the second. For example: v4l2_ctrl_new_std(&radio_ctrl_handler, &radio_ops, V4L2_CID_AUDIO_MUTE, ...); v4l2_ctrl_new_std(&video_ctrl_handler, &video_ops, V4L2_CID_BRIGHTNESS, ...); v4l2_ctrl_new_std(&video_ctrl_handler, &video_ops, V4L2_CID_CONTRAST, ...); - v4l2_ctrl_add_handler(&video_ctrl_handler, &radio_ctrl_handler); + v4l2_ctrl_add_handler(&video_ctrl_handler, &radio_ctrl_handler, NULL); + +The last argument to v4l2_ctrl_add_handler() is a filter function that allows +you to filter which controls will be added. Set it to NULL if you want to add +all controls. Or you can add specific controls to a handler: diff --git a/drivers/media/pci/cx88/cx88-blackbird.c b/drivers/media/pci/cx88/cx88-blackbird.c index 843ffd9e533b..def363fb71c0 100644 --- a/drivers/media/pci/cx88/cx88-blackbird.c +++ b/drivers/media/pci/cx88/cx88-blackbird.c @@ -1236,7 +1236,7 @@ static int cx8802_blackbird_probe(struct cx8802_driver *drv) err = cx2341x_handler_init(&dev->cxhdl, 36); if (err) goto fail_core; - v4l2_ctrl_add_handler(&dev->cxhdl.hdl, &core->video_hdl); + v4l2_ctrl_add_handler(&dev->cxhdl.hdl, &core->video_hdl, NULL); /* blackbird stuff */ printk("%s/2: cx23416 based mpeg encoder (blackbird reference design)\n", diff --git a/drivers/media/pci/cx88/cx88-video.c b/drivers/media/pci/cx88/cx88-video.c index f6fcc7e763ab..a146d50d7795 100644 --- a/drivers/media/pci/cx88/cx88-video.c +++ b/drivers/media/pci/cx88/cx88-video.c @@ -1795,7 +1795,7 @@ static int __devinit cx8800_initdev(struct pci_dev *pci_dev, if (vc->id == V4L2_CID_CHROMA_AGC) core->chroma_agc = vc; } - v4l2_ctrl_add_handler(&core->video_hdl, &core->audio_hdl); + v4l2_ctrl_add_handler(&core->video_hdl, &core->audio_hdl, NULL); /* load and configure helper modules */ diff --git a/drivers/media/platform/s5p-fimc/fimc-capture.c b/drivers/media/platform/s5p-fimc/fimc-capture.c index 40923885977a..ac2ca36039e4 100644 --- a/drivers/media/platform/s5p-fimc/fimc-capture.c +++ b/drivers/media/platform/s5p-fimc/fimc-capture.c @@ -472,7 +472,7 @@ int fimc_capture_ctrls_create(struct fimc_dev *fimc) return ret; return v4l2_ctrl_add_handler(&vid_cap->ctx->ctrls.handler, - fimc->pipeline.subdevs[IDX_SENSOR]->ctrl_handler); + fimc->pipeline.subdevs[IDX_SENSOR]->ctrl_handler, NULL); } static int fimc_capture_set_default_format(struct fimc_dev *fimc); diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c index f6b1c1f87761..3be92944f8e7 100644 --- a/drivers/media/platform/soc_camera/soc_camera.c +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -1184,7 +1184,7 @@ static int soc_camera_probe(struct soc_camera_device *icd) sd->grp_id = soc_camera_grp_id(icd); v4l2_set_subdev_hostdata(sd, icd); - if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler)) + if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler, NULL)) goto ectrl; /* At this point client .probe() should have run already */ 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) { diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c index 1f203b85a637..513969fa695d 100644 --- a/drivers/media/v4l2-core/v4l2-device.c +++ b/drivers/media/v4l2-core/v4l2-device.c @@ -166,7 +166,7 @@ int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev, } /* This just returns 0 if either of the two args is NULL */ - err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler); + err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler, NULL); if (err) { if (sd->internal_ops && sd->internal_ops->unregistered) sd->internal_ops->unregistered(sd); diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index 6890f5e11ad0..801adb466bd2 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -384,14 +384,28 @@ struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl, * @hdl: The control handler. * @add: The control handler whose controls you want to add to * the @hdl control handler. + * @filter: This function will filter which controls should be added. * - * Does nothing if either of the two is a NULL pointer. + * Does nothing if either of the two handlers is a NULL pointer. + * If @filter is NULL, then all controls are added. Otherwise only those + * controls for which @filter returns true will be added. * In case of an error @hdl->error will be set to the error code (if it * wasn't set already). */ 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)); +/** v4l2_ctrl_radio_filter() - Standard filter for radio controls. + * @ctrl: The control that is filtered. + * + * This will return true for any controls that are valid for radio device + * nodes. Those are all of the V4L2_CID_AUDIO_* user controls and all FM + * transmitter class controls. + * + * This function is to be used with v4l2_ctrl_add_handler(). + */ +bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl); /** v4l2_ctrl_cluster() - Mark all controls in the cluster as belonging to that cluster. * @ncontrols: The number of controls in this cluster. |