From patchwork Sat Aug 4 12:44:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 10555749 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 54B9B1822 for ; Sat, 4 Aug 2018 12:45:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 480732A13A for ; Sat, 4 Aug 2018 12:45:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C6272A146; Sat, 4 Aug 2018 12:45:57 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EB24E2A13A for ; Sat, 4 Aug 2018 12:45:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728723AbeHDOqb (ORCPT ); Sat, 4 Aug 2018 10:46:31 -0400 Received: from lb2-smtp-cloud7.xs4all.net ([194.109.24.28]:42240 "EHLO lb2-smtp-cloud7.xs4all.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727592AbeHDOqJ (ORCPT ); Sat, 4 Aug 2018 10:46:09 -0400 Received: from tschai.fritz.box ([212.251.195.8]) by smtp-cloud7.xs4all.net with ESMTPA id lvvyfCzUl6brUlvw3fFM4Q; Sat, 04 Aug 2018 14:45:31 +0200 From: Hans Verkuil To: linux-media@vger.kernel.org Cc: Hans Verkuil Subject: [PATCHv17 07/34] v4l2-device.h: add v4l2_device_supports_requests() helper Date: Sat, 4 Aug 2018 14:44:59 +0200 Message-Id: <20180804124526.46206-8-hverkuil@xs4all.nl> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180804124526.46206-1-hverkuil@xs4all.nl> References: <20180804124526.46206-1-hverkuil@xs4all.nl> X-CMAE-Envelope: MS4wfGvL6nGROrBfAI6uzSUG74PO1F28yBICiIKix5kL/k1KsW3y82qtpgIJNvqH6JlXWHSa8XtBWuiHUBQSAxqv1uvdeQXyOqnbtPhzH12lklUmUBU71v7u hpGinD4j06koiQwoBqPnUd1EqjyH7wpJUlZcHbXYAzlobJP7Z4/232i1bYIDfRAQ4pxw7lWoQRPRzNn+lQq6o0Z+V12MxO9hdqM= Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hans Verkuil Add a simple helper function that tests if the driver supports the request API. Signed-off-by: Hans Verkuil Reviewed-by: Mauro Carvalho Chehab --- include/media/v4l2-device.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h index b330e4a08a6b..ac7677a183ff 100644 --- a/include/media/v4l2-device.h +++ b/include/media/v4l2-device.h @@ -211,6 +211,17 @@ static inline void v4l2_subdev_notify(struct v4l2_subdev *sd, sd->v4l2_dev->notify(sd, notification, arg); } +/** + * v4l2_device_supports_requests - Test if requests are supported. + * + * @v4l2_dev: pointer to struct v4l2_device + */ +static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev) +{ + return v4l2_dev->mdev && v4l2_dev->mdev->ops && + v4l2_dev->mdev->ops->req_queue; +} + /* Helper macros to iterate over all subdevs. */ /**