From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([85.220.165.71]:59819 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728315AbeJ3DOR (ORCPT ); Mon, 29 Oct 2018 23:14:17 -0400 From: Marco Felsch To: mchehab@kernel.org, sakari.ailus@linux.intel.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: enrico.scholz@sigma-chemnitz.de, akinobu.mita@gmail.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, graphics@pengutronix.de Subject: [PATCH v2 1/6] media: mt9m111: add s_stream callback Date: Mon, 29 Oct 2018 19:24:05 +0100 Message-Id: <20181029182410.18783-2-m.felsch@pengutronix.de> In-Reply-To: <20181029182410.18783-1-m.felsch@pengutronix.de> References: <20181029182410.18783-1-m.felsch@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: 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 1395986a07bb..e0ac5aa6ea64 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 @@ -879,6 +880,14 @@ 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) { @@ -892,6 +901,7 @@ 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 = { -- 2.19.1