Refactor uvc_ctrl to make adding compound control easier. Currently __uvc_ctrl_get() only work for non-compound controls. Move the logic into __uvc_ctrl_std(), return error for compound controls. Make __uvc_ctrl_get() call __uvc_ctrl_std() inside. Also modify some of the callers of __uvc_ctrl_get() to call __uvc_ctrl_get_std() instead. Signed-off-by: Yunke Cao <yunkec@xxxxxxxxxx> --- Changelog since v12: - No change. Changelog since v11: - Minor change to avoid negative if statement. Changelog since v10: - Better commit message. Changelog since v9: - No change. Changelog since v8: - No change. Changelog since v7: - Newly added patch. Split the refactoring of uvc_ctrl_get from v7 3/7. drivers/media/usb/uvc/uvc_ctrl.c | 42 +++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 14 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 8d8333786333..4a685532f7eb 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1081,15 +1081,15 @@ static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, return ret; } -static int __uvc_ctrl_get(struct uvc_video_chain *chain, - struct uvc_control *ctrl, - struct uvc_control_mapping *mapping, - s32 *value) +static int __uvc_ctrl_get_std(struct uvc_video_chain *chain, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + s32 *value) { int ret; - if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) - return -EACCES; + if (uvc_ctrl_mapping_is_compound(mapping)) + return -EINVAL; ret = __uvc_ctrl_load_cur(chain, ctrl); if (ret < 0) @@ -1199,7 +1199,7 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) return 0; - ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); + ret = __uvc_ctrl_get_std(chain, master_ctrl, master_map, &val); if (ret >= 0 && val != mapping->master_manual) return -EACCES; @@ -1264,8 +1264,13 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, __uvc_find_control(ctrl->entity, mapping->master_id, &master_map, &master_ctrl, 0); if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) { - s32 val; - int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); + s32 val = 0; + int ret; + + if (uvc_ctrl_mapping_is_compound(master_map)) + return -EINVAL; + + ret = __uvc_ctrl_get_std(chain, master_ctrl, master_map, &val); if (ret < 0) return ret; @@ -1532,7 +1537,8 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, if (ctrl == NULL) return; - if (__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0) + if (uvc_ctrl_mapping_is_compound(mapping) || + __uvc_ctrl_get_std(chain, ctrl, mapping, &val) == 0) changes |= V4L2_EVENT_CTRL_CH_VALUE; uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); @@ -1703,7 +1709,8 @@ static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; s32 val = 0; - if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) + if (uvc_ctrl_mapping_is_compound(mapping) || + __uvc_ctrl_get_std(handle->chain, ctrl, mapping, &val) == 0) changes |= V4L2_EVENT_CTRL_CH_VALUE; uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, @@ -1883,7 +1890,10 @@ int uvc_ctrl_get(struct uvc_video_chain *chain, if (ctrl == NULL) return -EINVAL; - return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); + if (uvc_ctrl_mapping_is_compound(mapping)) + return -EINVAL; + else + return __uvc_ctrl_get_std(chain, ctrl, mapping, &xctrl->value); } static int __uvc_ctrl_get_boundary_std(struct uvc_video_chain *chain, @@ -2042,8 +2052,12 @@ int uvc_ctrl_set(struct uvc_fh *handle, ctrl->info.size); } - mapping->set(mapping, value, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); + if (uvc_ctrl_mapping_is_compound(mapping)) + return -EINVAL; + else + mapping->set(mapping, value, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); + if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) ctrl->handle = handle; -- 2.43.0.rc2.451.g8631bc7472-goog