From patchwork Fri Oct 19 15:50:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Felsch X-Patchwork-Id: 10649699 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 BFF3114E2 for ; Fri, 19 Oct 2018 15:50:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AE9AE28498 for ; Fri, 19 Oct 2018 15:50:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A318B284A3; Fri, 19 Oct 2018 15:50:45 +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 4DB16284AF for ; Fri, 19 Oct 2018 15:50:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727738AbeJSX5Y (ORCPT ); Fri, 19 Oct 2018 19:57:24 -0400 Received: from metis.ext.pengutronix.de ([85.220.165.71]:41499 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727724AbeJSX5X (ORCPT ); Fri, 19 Oct 2018 19:57:23 -0400 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gDX2r-0005FY-MJ; Fri, 19 Oct 2018 17:50:37 +0200 Received: from mfe by dude.hi.pengutronix.de with local (Exim 4.91) (envelope-from ) id 1gDX2p-0000aM-QS; Fri, 19 Oct 2018 17:50:35 +0200 From: Marco Felsch To: mchehab@kernel.org, sakari.ailus@linux.intel.com Cc: akinobu.mita@gmail.com, enrico.scholz@sigma-chemnitz.de, linux-media@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH 1/4] media: mt9m111: add s_stream callback Date: Fri, 19 Oct 2018 17:50:24 +0200 Message-Id: <20181019155027.28682-2-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20181019155027.28682-1-m.felsch@pengutronix.de> References: <20181019155027.28682-1-m.felsch@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-media@vger.kernel.org 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 Add callback to check if we are already streaming. Now other callbacks can check the state and return -EBUSY if we already streaming. Signed-off-by: Marco Felsch --- drivers/media/i2c/mt9m111.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/media/i2c/mt9m111.c b/drivers/media/i2c/mt9m111.c index efda1aa95ca0..78d08a81e0e2 100644 --- a/drivers/media/i2c/mt9m111.c +++ b/drivers/media/i2c/mt9m111.c @@ -217,6 +217,7 @@ struct mt9m111 { int power_count; const struct mt9m111_datafmt *fmt; int lastpage; /* PageMap cache value */ + bool is_streaming; #ifdef CONFIG_MEDIA_CONTROLLER struct media_pad pad; #endif @@ -880,6 +881,14 @@ static int mt9m111_enum_mbus_code(struct v4l2_subdev *sd, return 0; } +static int mt9m111_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev); + + mt9m111->is_streaming = !!enable; + return 0; +} + static int mt9m111_g_mbus_config(struct v4l2_subdev *sd, struct v4l2_mbus_config *cfg) { @@ -893,6 +902,7 @@ static int mt9m111_g_mbus_config(struct v4l2_subdev *sd, static const struct v4l2_subdev_video_ops mt9m111_subdev_video_ops = { .g_mbus_config = mt9m111_g_mbus_config, + .s_stream = mt9m111_s_stream, }; static const struct v4l2_subdev_pad_ops mt9m111_subdev_pad_ops = {