diff options
author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2010-01-23 09:30:20 (GMT) |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-02-26 18:11:04 (GMT) |
commit | 59529081e092506edb81a42d914e2d0522f65ca7 (patch) | |
tree | 237632dbcf3c1da3443b316a3b66969c9db8514a /drivers | |
parent | 8a4e76c14cbe0609fdb5c558f867fe7c556bb1c7 (diff) | |
download | linux-fsl-qoriq-59529081e092506edb81a42d914e2d0522f65ca7.tar.xz |
V4L/DVB: uvcvideo: Cache control min, max, res and def query results
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/media/video/uvc/uvc_ctrl.c | 120 | ||||
-rw-r--r-- | drivers/media/video/uvc/uvcvideo.h | 3 |
2 files changed, 74 insertions, 49 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c index f4e5ba2..5ff5013 100644 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -23,9 +23,13 @@ #include "uvcvideo.h" -#define UVC_CTRL_NDATA 2 #define UVC_CTRL_DATA_CURRENT 0 #define UVC_CTRL_DATA_BACKUP 1 +#define UVC_CTRL_DATA_MIN 2 +#define UVC_CTRL_DATA_MAX 3 +#define UVC_CTRL_DATA_RES 4 +#define UVC_CTRL_DATA_DEF 5 +#define UVC_CTRL_DATA_LAST 6 /* ------------------------------------------------------------------------ * Controls @@ -755,6 +759,49 @@ struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, return ctrl; } +static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, + struct uvc_control *ctrl) +{ + int ret; + + if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { + ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), + ctrl->info->size); + if (ret < 0) + return ret; + } + + if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { + ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), + ctrl->info->size); + if (ret < 0) + return ret; + } + if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { + ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), + ctrl->info->size); + if (ret < 0) + return ret; + } + if (ctrl->info->flags & UVC_CONTROL_GET_RES) { + ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), + ctrl->info->size); + if (ret < 0) + return ret; + } + + ctrl->cached = 1; + return 0; +} + int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl) { @@ -762,17 +809,12 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct uvc_control_mapping *mapping; struct uvc_menu_info *menu; unsigned int i; - __u8 *data; int ret; ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); if (ctrl == NULL) return -EINVAL; - data = kmalloc(ctrl->info->size, GFP_KERNEL); - if (data == NULL) - return -ENOMEM; - memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); v4l2_ctrl->id = mapping->id; v4l2_ctrl->type = mapping->v4l2_type; @@ -782,14 +824,15 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR)) v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; - if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, - chain->dev->intfnum, ctrl->info->selector, - data, ctrl->info->size); + if (!ctrl->cached) { + ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) - goto out; - v4l2_ctrl->default_value = - mapping->get(mapping, UVC_GET_DEF, data); + return ret; + } + + if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { + v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); } switch (mapping->v4l2_type) { @@ -806,56 +849,37 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, } } - ret = 0; - goto out; + return 0; case V4L2_CTRL_TYPE_BOOLEAN: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = 1; v4l2_ctrl->step = 1; - ret = 0; - goto out; + return 0; case V4L2_CTRL_TYPE_BUTTON: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = 0; v4l2_ctrl->step = 0; - ret = 0; - goto out; + return 0; default: break; } - if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, - chain->dev->intfnum, ctrl->info->selector, - data, ctrl->info->size); - if (ret < 0) - goto out; - v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, data); - } - if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, - chain->dev->intfnum, ctrl->info->selector, - data, ctrl->info->size); - if (ret < 0) - goto out; - v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, data); - } - if (ctrl->info->flags & UVC_CONTROL_GET_RES) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, - chain->dev->intfnum, ctrl->info->selector, - data, ctrl->info->size); - if (ret < 0) - goto out; - v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, data); - } + if (ctrl->info->flags & UVC_CONTROL_GET_MIN) + v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); - ret = 0; -out: - kfree(data); - return ret; + if (ctrl->info->flags & UVC_CONTROL_GET_MAX) + v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); + + if (ctrl->info->flags & UVC_CONTROL_GET_RES) + v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); + + return 0; } @@ -1246,7 +1270,7 @@ static void uvc_ctrl_add_ctrl(struct uvc_device *dev, } ctrl->info = info; - ctrl->data = kmalloc(ctrl->info->size * UVC_CTRL_NDATA, GFP_KERNEL); + ctrl->data = kmalloc(ctrl->info->size * UVC_CTRL_DATA_LAST, GFP_KERNEL); uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " "entity %u\n", ctrl->info->entity, ctrl->info->selector, dev->udev->devpath, entity->id); diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index 0c7966f..2bba059 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -245,7 +245,8 @@ struct uvc_control { uvc_control_info. */ __u8 dirty : 1, loaded : 1, - modified : 1; + modified : 1, + cached : 1; __u8 *data; }; |