From patchwork Thu Feb 4 04:03:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah Khan X-Patchwork-Id: 8214251 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 14D79BEEE5 for ; Thu, 4 Feb 2016 07:27:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2E9C72037F for ; Thu, 4 Feb 2016 07:27:38 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 8333D2037C for ; Thu, 4 Feb 2016 07:27:36 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 981C62667DC; Thu, 4 Feb 2016 08:27:35 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 9B24B265DEF; Thu, 4 Feb 2016 08:20:37 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 1D0CB265DB5; Thu, 4 Feb 2016 05:04:33 +0100 (CET) Received: from mailout.easymail.ca (mailout.easymail.ca [64.68.201.169]) by alsa0.perex.cz (Postfix) with ESMTP id 4AF59261A76 for ; Thu, 4 Feb 2016 05:04:12 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id A6034EA0D; Wed, 3 Feb 2016 23:04:11 -0500 (EST) X-Quarantine-ID: X-Virus-Scanned: Debian amavisd-new at mailout.easymail.ca X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (easymail-mailout.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id g-EQnh1-PJib; Wed, 3 Feb 2016 23:04:11 -0500 (EST) Received: from mail.gonehiking.org (c-73-181-52-62.hsd1.co.comcast.net [73.181.52.62]) by mailout.easymail.ca (Postfix) with ESMTPA id F2DD8E9FC; Wed, 3 Feb 2016 23:04:10 -0500 (EST) Received: from lorien.internal (lorien-wl.internal [192.168.1.40]) by mail.gonehiking.org (Postfix) with ESMTP id 148249F184; Wed, 3 Feb 2016 21:04:10 -0700 (MST) From: Shuah Khan To: mchehab@osg.samsung.com, tiwai@suse.com, clemens@ladisch.de, hans.verkuil@cisco.com, laurent.pinchart@ideasonboard.com, sakari.ailus@linux.intel.com, javier@osg.samsung.com Date: Wed, 3 Feb 2016 21:03:39 -0700 Message-Id: <7df34ecdf35d473535abefa6643b2db24457b8e6.1454557589.git.shuahkh@osg.samsung.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Thu, 04 Feb 2016 08:20:29 +0100 Cc: klock.android@gmail.com, k.kozlowski@samsung.com, alsa-devel@alsa-project.org, prabhakar.csengg@gmail.com, normalperson@yhbt.net, ricardo.ribalda@gmail.com, elfring@users.sourceforge.net, m.szyprowski@samsung.com, pierre-louis.bossart@linux.intel.com, arnd@arndb.de, corbet@lwn.net, Shuah Khan , j.anaszewski@samsung.com, crope@iki.fi, linuxbugs@vittgam.net, takamichiho@gmail.com, jh1009.sung@samsung.com, dan.carpenter@oracle.com, linux-media@vger.kernel.org, julian@jusst.de, ricard.wanderlof@axis.com, pawel@osciak.com, misterpib@gmail.com, tvboxspy@gmail.com, linux-kernel@vger.kernel.org, inki.dae@samsung.com, geliangtang@163.com, nenggun.kim@samsung.com, joe@oampo.co.uk, dominic.sacre@gmx.de, chehabrafael@gmail.com, labbott@fedoraproject.org, linux-api@vger.kernel.org, sw0312.kim@samsung.com, ruchandani.tina@gmail.com, gtmkramer@xs4all.nl, kyungmin.park@samsung.com, stefanr@s5r6.in-berlin.de, johan@oljud.se, p.zabel@pengutronix.de, daniel@zonque.org Subject: [alsa-devel] [PATCH v2 07/22] media: v4l-core add enable/disable source common interfaces X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Add a new interfaces to be used by v4l-core to invoke enable source and disable_source handlers in the media_device. The enable_source helper function invokes the enable_source handler to find media source entity connected to the entity and check is it is available or busy. If source is available, link is activated and pipeline is started. The disable_source helper function invokes the disable_source handler to deactivate and stop the pipeline. Signed-off-by: Shuah Khan --- drivers/media/v4l2-core/Makefile | 2 +- drivers/media/v4l2-core/v4l2-mc.c | 60 +++++++++++++++++++++++++++++++++++++++ include/media/v4l2-dev.h | 1 + include/media/v4l2-mc.h | 52 +++++++++++++++++++++++++++++++++ 4 files changed, 114 insertions(+), 1 deletion(-) create mode 100644 drivers/media/v4l2-core/v4l2-mc.c diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile index 1dc8bba..c6acc01 100644 --- a/drivers/media/v4l2-core/Makefile +++ b/drivers/media/v4l2-core/Makefile @@ -6,7 +6,7 @@ tuner-objs := tuner-core.o videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o v4l2-fh.o \ v4l2-event.o v4l2-ctrls.o v4l2-subdev.o v4l2-clk.o \ - v4l2-async.o + v4l2-async.o v4l2-mc.o ifeq ($(CONFIG_COMPAT),y) videodev-objs += v4l2-compat-ioctl32.o endif diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c new file mode 100644 index 0000000..87416df --- /dev/null +++ b/drivers/media/v4l2-core/v4l2-mc.c @@ -0,0 +1,60 @@ +/* + * v4l2-mc.c - Media Controller V4L2 Common Interfaces + * + * Copyright (C) 2016 Shuah Khan + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include + +int v4l_enable_media_source(struct video_device *vdev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + struct media_device *mdev = vdev->entity.graph_obj.mdev; + int ret; + + if (!mdev || !mdev->enable_source) + return 0; + ret = mdev->enable_source(&vdev->entity, &vdev->pipe); + if (ret) + return -EBUSY; + return 0; +#endif /* CONFIG_MEDIA_CONTROLLER */ + return 0; +} +EXPORT_SYMBOL_GPL(v4l_enable_media_source); + +void v4l_disable_media_source(struct video_device *vdev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + struct media_device *mdev = vdev->entity.graph_obj.mdev; + + if (mdev && mdev->disable_source) + mdev->disable_source(&vdev->entity); +#endif /* CONFIG_MEDIA_CONTROLLER */ +} +EXPORT_SYMBOL_GPL(v4l_disable_media_source); + +int v4l_vb2q_enable_media_source(struct vb2_queue *q) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + struct v4l2_fh *fh = q->owner; + + return v4l_enable_media_source(fh->vdev); +#endif /* CONFIG_MEDIA_CONTROLLER */ + return 0; +} +EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_source); + diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index eeabf20..76056ab 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -87,6 +87,7 @@ struct video_device #if defined(CONFIG_MEDIA_CONTROLLER) struct media_entity entity; struct media_intf_devnode *intf_devnode; + struct media_pipeline pipe; #endif /* device ops */ const struct v4l2_file_operations *fops; diff --git a/include/media/v4l2-mc.h b/include/media/v4l2-mc.h index df11519..df1a98f 100644 --- a/include/media/v4l2-mc.h +++ b/include/media/v4l2-mc.h @@ -14,6 +14,11 @@ * GNU General Public License for more details. */ +#ifndef _V4L2_MC_H +#define _V4L2_MC_H + +#include + /** * enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER * @@ -89,3 +94,50 @@ enum demod_pad_index { DEMOD_PAD_VBI_OUT, DEMOD_NUM_PADS }; + +/** + * v4l_enable_media_source() - Hold media source for exclusive use + * if free + * + * @vdev - poniter to struct video_device + * + * This interface calls enable_source handler to determine if + * media source is free for use. The enable_source handler is + * responsible for checking is the media source is free and + * start a pipeline between the media source and the media + * entity associated with the video device. This interface + * should be called from v4l2-core and dvb-core interfaces + * that change the source configuration. + * + * Return: returns zero on success or a negative error code. + */ +int v4l_enable_media_source(struct video_device *vdev); + +/** + * v4l_disable_media_source() - Release media source + * + * @vdev - poniter to struct video_device + * + * This interface calls disable_source handler to release + * the media source. The disable_source handler stops the + * active media pipeline between the media source and the + * media entity associated with the video device. + * + * Return: returns zero on success or a negative error code. + */ +void v4l_disable_media_source(struct video_device *vdev); +/* + * v4l_vb2q_enable_media_tuner - Hold media source for exclusive use + * if free. + * @q - pointer to struct vb2_queue + * + * Wrapper for v4l_enable_media_source(). This function should + * be called from v4l2-core to enable the media source with + * pointer to struct vb2_queue as the input argument. Some + * v4l2-core interfaces don't have access to video device and + * this interface finds the struct video_device for the q and + * calls v4l_enable_media_source(). + */ +int v4l_vb2q_enable_media_source(struct vb2_queue *q); + +#endif /* _V4L2_MC_H */