From patchwork Fri Nov 2 00:31:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah X-Patchwork-Id: 10665803 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 325F714BD for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 194012C404 for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 08FED2C25D; Fri, 2 Nov 2018 16:07:05 +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=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9EEC92C25D for ; Fri, 2 Nov 2018 16:07:03 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id BA01C2678EC; Fri, 2 Nov 2018 16:41:53 +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 8A9772678EB; Fri, 2 Nov 2018 01:31:44 +0100 (CET) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by alsa0.perex.cz (Postfix) with ESMTP id D55582678EC for ; Fri, 2 Nov 2018 01:31:41 +0100 (CET) Received: from localhost.localdomain (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8E83320837; Fri, 2 Nov 2018 00:31:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541118701; bh=BJPd9jCHKlH92kPBz/USeJlu1M4p/Avk3dvxf4Jrf7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=02xdBde/LHhJFLEaxozu3LpIdmU25DlND9+o8I2fDZoh5zyQ9OW7nLqUhN/0gNyjY 8ovn0ijXwq1uVVNUu6BjhtiUzsnKalK5TBwO1lIohLEQPI5acmCRqnsTLLV1n83TiU wCDOop8VUXAYWquyEpcY7Aj5CJDN9HwYrrGtbvWY= From: shuah@kernel.org To: mchehab@kernel.org, perex@perex.cz, tiwai@suse.com Date: Thu, 1 Nov 2018 18:31:30 -0600 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Fri, 02 Nov 2018 16:41:51 +0100 Cc: alsa-devel@alsa-project.org, Shuah Khan , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [alsa-devel] [RFC PATCH v8 1/4] media: Media Device Allocator API 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 From: Shuah Khan Media Device Allocator API to allows multiple drivers share a media device. Using this API, drivers can allocate a media device with the shared struct device as the key. Once the media device is allocated by a driver, other drivers can get a reference to it. The media device is released when all the references are released. Signed-off-by: Shuah Khan --- Documentation/media/kapi/mc-core.rst | 37 ++++++++ drivers/media/Makefile | 3 +- drivers/media/media-dev-allocator.c | 132 +++++++++++++++++++++++++++ include/media/media-dev-allocator.h | 53 +++++++++++ 4 files changed, 224 insertions(+), 1 deletion(-) create mode 100644 drivers/media/media-dev-allocator.c create mode 100644 include/media/media-dev-allocator.h diff --git a/Documentation/media/kapi/mc-core.rst b/Documentation/media/kapi/mc-core.rst index 0c05503eaf1f..d6f409598065 100644 --- a/Documentation/media/kapi/mc-core.rst +++ b/Documentation/media/kapi/mc-core.rst @@ -257,8 +257,45 @@ Subsystems should facilitate link validation by providing subsystem specific helper functions to provide easy access for commonly needed information, and in the end provide a way to use driver-specific callbacks. +Media Controller Device Allocator API +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +When media device belongs to more than one driver, the shared media device +is allocated with the shared struct device as the key for look ups. + +Shared media device should stay in registered state until the last driver +unregisters it. In addition, media device should be released when all the +references are released. Each driver gets a reference to the media device +during probe, when it allocates the media device. If media device is already +allocated, allocate API bumps up the refcount and return the existing media +device. Driver puts the reference back from its disconnect routine when it +calls :c:func:`media_device_delete()`. + +Media device is unregistered and cleaned up from the kref put handler to +ensure that the media device stays in registered state until the last driver +unregisters the media device. + +**Driver Usage** + +Drivers should use the media-core routines to get register reference and +call :c:func:`media_device_delete()` routine to make sure the shared media +device delete is handled correctly. + +**driver probe:** +Call :c:func:`media_device_usb_allocate()` to allocate or get a reference +Call :c:func:`media_device_register()`, if media devnode isn't registered + +**driver disconnect:** +Call :c:func:`media_device_delete()` to free the media_device. Free'ing is +handled by the kref put handler. + +API Definitions +^^^^^^^^^^^^^^^ + .. kernel-doc:: include/media/media-device.h .. kernel-doc:: include/media/media-devnode.h .. kernel-doc:: include/media/media-entity.h + +.. kernel-doc:: include/media/media-dev-allocator.h diff --git a/drivers/media/Makefile b/drivers/media/Makefile index 594b462ddf0e..8608f0a41dca 100644 --- a/drivers/media/Makefile +++ b/drivers/media/Makefile @@ -3,7 +3,8 @@ # Makefile for the kernel multimedia device drivers. # -media-objs := media-device.o media-devnode.o media-entity.o +media-objs := media-device.o media-devnode.o media-entity.o \ + media-dev-allocator.o # # I2C drivers should come before other drivers, otherwise they'll fail diff --git a/drivers/media/media-dev-allocator.c b/drivers/media/media-dev-allocator.c new file mode 100644 index 000000000000..262d1293dc13 --- /dev/null +++ b/drivers/media/media-dev-allocator.c @@ -0,0 +1,132 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * media-dev-allocator.c - Media Controller Device Allocator API + * + * Copyright (c) 2018 Shuah Khan + * + * Credits: Suggested by Laurent Pinchart + */ + +/* + * This file adds a global refcounted Media Controller Device Instance API. + * A system wide global media device list is managed and each media device + * includes a kref count. The last put on the media device releases the media + * device instance. + * + */ + +#include +#include +#include +#include + +#include + +static LIST_HEAD(media_device_list); +static DEFINE_MUTEX(media_device_lock); + +struct media_device_instance { + struct media_device mdev; + struct module *owner; + struct list_head list; + struct kref refcount; +}; + +static inline struct media_device_instance * +to_media_device_instance(struct media_device *mdev) +{ + return container_of(mdev, struct media_device_instance, mdev); +} + +static void media_device_instance_release(struct kref *kref) +{ + struct media_device_instance *mdi = + container_of(kref, struct media_device_instance, refcount); + + dev_dbg(mdi->mdev.dev, "%s: mdev=%p\n", __func__, &mdi->mdev); + + mutex_lock(&media_device_lock); + + media_device_unregister(&mdi->mdev); + media_device_cleanup(&mdi->mdev); + + list_del(&mdi->list); + mutex_unlock(&media_device_lock); + + kfree(mdi); +} + +/* Callers should hold media_device_lock when calling this function */ +static struct media_device *__media_device_get(struct device *dev, + char *module_name) +{ + struct media_device_instance *mdi; + + list_for_each_entry(mdi, &media_device_list, list) { + if (mdi->mdev.dev != dev) + continue; + + kref_get(&mdi->refcount); + /* get module reference for the media_device owner */ + if (find_module(module_name) != mdi->owner && + !try_module_get(mdi->owner)) + dev_err(dev, "%s: try_module_get() error\n", __func__); + dev_dbg(dev, "%s: get mdev=%p module_name %s\n", + __func__, &mdi->mdev, module_name); + return &mdi->mdev; + } + + mdi = kzalloc(sizeof(*mdi), GFP_KERNEL); + if (!mdi) + return NULL; + + mdi->owner = find_module(module_name); + kref_init(&mdi->refcount); + list_add_tail(&mdi->list, &media_device_list); + + dev_dbg(dev, "%s: alloc mdev=%p module_name %s\n", __func__, + &mdi->mdev, module_name); + return &mdi->mdev; +} + +#if IS_ENABLED(CONFIG_USB) +struct media_device *media_device_usb_allocate(struct usb_device *udev, + char *module_name) +{ + struct media_device *mdev; + + mutex_lock(&media_device_lock); + mdev = __media_device_get(&udev->dev, module_name); + if (!mdev) { + mutex_unlock(&media_device_lock); + return ERR_PTR(-ENOMEM); + } + + /* check if media device is already initialized */ + if (!mdev->dev) + __media_device_usb_init(mdev, udev, udev->product, + module_name); + mutex_unlock(&media_device_lock); + return mdev; +} +EXPORT_SYMBOL_GPL(media_device_usb_allocate); +#endif + +void media_device_delete(struct media_device *mdev, char *module_name) +{ + struct media_device_instance *mdi = to_media_device_instance(mdev); + + dev_dbg(mdi->mdev.dev, "%s: mdev=%p module_name %s\n", + __func__, &mdi->mdev, module_name); + + mutex_lock(&media_device_lock); + /* put module reference if media_device owner is not THIS_MODULE */ + if (mdi->owner != find_module(module_name)) { + module_put(mdi->owner); + dev_dbg(mdi->mdev.dev, + "%s decremented owner module reference\n", __func__); + } + mutex_unlock(&media_device_lock); + kref_put(&mdi->refcount, media_device_instance_release); +} +EXPORT_SYMBOL_GPL(media_device_delete); diff --git a/include/media/media-dev-allocator.h b/include/media/media-dev-allocator.h new file mode 100644 index 000000000000..8fbadff2cef8 --- /dev/null +++ b/include/media/media-dev-allocator.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * media-dev-allocator.h - Media Controller Device Allocator API + * + * Copyright (c) 2018 Shuah Khan + * + * Credits: Suggested by Laurent Pinchart + */ + +/* + * This file adds a global ref-counted Media Controller Device Instance API. + * A system wide global media device list is managed and each media device + * includes a kref count. The last put on the media device releases the media + * device instance. + */ + +#ifndef _MEDIA_DEV_ALLOCTOR_H +#define _MEDIA_DEV_ALLOCTOR_H + +struct usb_device; + +#ifdef CONFIG_MEDIA_CONTROLLER +/** + * media_device_usb_allocate() - Allocate and return struct &media device + * + * @udev: struct &usb_device pointer + * @module_name: should be filled with %KBUILD_MODNAME + * + * This interface should be called to allocate a Media Device when multiple + * drivers share usb_device and the media device. This interface allocates + * &media_device structure and calls media_device_usb_init() to initialize + * it. + * + */ +struct media_device *media_device_usb_allocate(struct usb_device *udev, + char *module_name); +/** + * media_device_delete() - Release media device. Calls kref_put(). + * + * @mdev: struct &media_device pointer + * @module_name: should be filled with %KBUILD_MODNAME + * + * This interface should be called to put Media Device Instance kref. + */ +void media_device_delete(struct media_device *mdev, char *module_name); +#else +static inline struct media_device *media_device_usb_allocate( + struct usb_device *udev, char *module_name) + { return NULL; } +static inline void media_device_delete( + struct media_device *mdev, char *module_name) { } +#endif /* CONFIG_MEDIA_CONTROLLER */ +#endif From patchwork Fri Nov 2 00:31:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah X-Patchwork-Id: 10665805 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 71EA614E2 for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 56F822C25D for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 48FEE2C2CD; Fri, 2 Nov 2018 16:07:05 +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=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A0CFF2C2DD for ; Fri, 2 Nov 2018 16:07:04 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id AA32B2678EB; Fri, 2 Nov 2018 16:41:58 +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 BC06F267928; Fri, 2 Nov 2018 01:31:47 +0100 (CET) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by alsa0.perex.cz (Postfix) with ESMTP id 0D0FC2678F3 for ; Fri, 2 Nov 2018 01:31:46 +0100 (CET) Received: from localhost.localdomain (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AF6BA2082E; Fri, 2 Nov 2018 00:31:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541118705; bh=05Uvfrcry3CTIRujcJGjHXPRkFbZQdevDJEoAb9ZAZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=PWpmzX3TlN2wsUHUAmCTGVwJLHRZ0IdTpiNoKuXWMSHrfUX7m1jDrOmzslf9H02qT 0oM0hwGDMur+caK+Vo3fFULEKlDS6YuaE6KG3V4AZe3YX0AM5PyeJ5pVxwIlQ8AdE+ BXYKk3WB94KdNBvExFNjcQE3900J7k/6XWkA77ks= From: shuah@kernel.org To: mchehab@kernel.org, perex@perex.cz, tiwai@suse.com Date: Thu, 1 Nov 2018 18:31:31 -0600 Message-Id: <0f9977e1d2ab39e8b8e5f0307ee89cfca012c9f3.1541109584.git.shuah@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Fri, 02 Nov 2018 16:41:51 +0100 Cc: alsa-devel@alsa-project.org, Shuah Khan , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [alsa-devel] [RFC PATCH v8 2/4] media: change au0828 to use Media Device Allocator API 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 From: Shuah Khan Change au0828 to use Media Device Allocator API to allocate media device with the parent usb struct device as the key, so it can be shared with the snd_usb_audio driver. Signed-off-by: Shuah Khan --- drivers/media/usb/au0828/au0828-core.c | 12 ++++-------- drivers/media/usb/au0828/au0828.h | 1 + 2 files changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c index cd363a2100d4..837409d190a1 100644 --- a/drivers/media/usb/au0828/au0828-core.c +++ b/drivers/media/usb/au0828/au0828-core.c @@ -155,9 +155,7 @@ static void au0828_unregister_media_device(struct au0828_dev *dev) dev->media_dev->disable_source = NULL; mutex_unlock(&mdev->graph_mutex); - media_device_unregister(dev->media_dev); - media_device_cleanup(dev->media_dev); - kfree(dev->media_dev); + media_device_delete(dev->media_dev, KBUILD_MODNAME); dev->media_dev = NULL; #endif } @@ -210,14 +208,10 @@ static int au0828_media_device_init(struct au0828_dev *dev, #ifdef CONFIG_MEDIA_CONTROLLER struct media_device *mdev; - mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); + mdev = media_device_usb_allocate(udev, KBUILD_MODNAME); if (!mdev) return -ENOMEM; - /* check if media device is already initialized */ - if (!mdev->dev) - media_device_usb_init(mdev, udev, udev->product); - dev->media_dev = mdev; #endif return 0; @@ -478,6 +472,8 @@ static int au0828_media_device_register(struct au0828_dev *dev, /* register media device */ ret = media_device_register(dev->media_dev); if (ret) { + media_device_delete(dev->media_dev, KBUILD_MODNAME); + dev->media_dev = NULL; dev_err(&udev->dev, "Media Device Register Error: %d\n", ret); return ret; diff --git a/drivers/media/usb/au0828/au0828.h b/drivers/media/usb/au0828/au0828.h index 004eadef55c7..7dbe3db15ebe 100644 --- a/drivers/media/usb/au0828/au0828.h +++ b/drivers/media/usb/au0828/au0828.h @@ -31,6 +31,7 @@ #include #include #include +#include /* DVB */ #include From patchwork Fri Nov 2 00:31:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah X-Patchwork-Id: 10665813 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 BDC914B7E for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A7A9B2C38A for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9C6D72C2CD; Fri, 2 Nov 2018 16:07:05 +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=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E80672C3D3 for ; Fri, 2 Nov 2018 16:07:04 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 0B87E2679BF; Fri, 2 Nov 2018 16:42:00 +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 A9F6C267939; Fri, 2 Nov 2018 01:31:49 +0100 (CET) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by alsa0.perex.cz (Postfix) with ESMTP id EFF9F267928 for ; Fri, 2 Nov 2018 01:31:47 +0100 (CET) Received: from localhost.localdomain (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C48D720840; Fri, 2 Nov 2018 00:31:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541118707; bh=J52tuGlXP99up45X1moW9a/M3v90My264/sTTr+JuCg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=HZcIGl3FsVoY+yKjUfuwIHJNv+NtxzUtGhvkpVbNosV5dHNk+bPypKLYZqmsyZy02 9ltIcjxLDyoAGkmWl+S4a7T7O67er+8YNnPXnWhz+gMusbjOQ8msuQUGkHdxhsEFyr SokI/2TN8CbXH1DwAAIfiHZvSdvFrf/JmhKUxyKY= From: shuah@kernel.org To: mchehab@kernel.org, perex@perex.cz, tiwai@suse.com Date: Thu, 1 Nov 2018 18:31:32 -0600 Message-Id: <0f47952fd84fd275646e3c9a18e208ced08dd6bb.1541109584.git.shuah@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Fri, 02 Nov 2018 16:41:51 +0100 Cc: alsa-devel@alsa-project.org, Shuah Khan , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [alsa-devel] [RFC PATCH v8 3/4] media: media.h: Enable ALSA MEDIA_INTF_T* interface types 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 From: Shuah Khan Move ALSA MEDIA_INTF_T* interface types back into __KERNEL__ scope to get ready for adding ALSA support to the media controller. Signed-off-by: Shuah Khan --- include/uapi/linux/media.h | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h index 36f76e777ef9..07be07263597 100644 --- a/include/uapi/linux/media.h +++ b/include/uapi/linux/media.h @@ -262,6 +262,16 @@ struct media_links_enum { #define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4) #define MEDIA_INTF_T_V4L_TOUCH (MEDIA_INTF_T_V4L_BASE + 5) +#define MEDIA_INTF_T_ALSA_BASE 0x00000300 +#define MEDIA_INTF_T_ALSA_PCM_CAPTURE (MEDIA_INTF_T_ALSA_BASE) +#define MEDIA_INTF_T_ALSA_PCM_PLAYBACK (MEDIA_INTF_T_ALSA_BASE + 1) +#define MEDIA_INTF_T_ALSA_CONTROL (MEDIA_INTF_T_ALSA_BASE + 2) +#define MEDIA_INTF_T_ALSA_COMPRESS (MEDIA_INTF_T_ALSA_BASE + 3) +#define MEDIA_INTF_T_ALSA_RAWMIDI (MEDIA_INTF_T_ALSA_BASE + 4) +#define MEDIA_INTF_T_ALSA_HWDEP (MEDIA_INTF_T_ALSA_BASE + 5) +#define MEDIA_INTF_T_ALSA_SEQUENCER (MEDIA_INTF_T_ALSA_BASE + 6) +#define MEDIA_INTF_T_ALSA_TIMER (MEDIA_INTF_T_ALSA_BASE + 7) + #if defined(__KERNEL__) /* @@ -404,21 +414,6 @@ struct media_v2_topology { #define MEDIA_ENT_F_DTV_DECODER MEDIA_ENT_F_DV_DECODER -/* - * There is still no ALSA support in the media controller. These - * defines should not have been added and we leave them here only - * in case some application tries to use these defines. - */ -#define MEDIA_INTF_T_ALSA_BASE 0x00000300 -#define MEDIA_INTF_T_ALSA_PCM_CAPTURE (MEDIA_INTF_T_ALSA_BASE) -#define MEDIA_INTF_T_ALSA_PCM_PLAYBACK (MEDIA_INTF_T_ALSA_BASE + 1) -#define MEDIA_INTF_T_ALSA_CONTROL (MEDIA_INTF_T_ALSA_BASE + 2) -#define MEDIA_INTF_T_ALSA_COMPRESS (MEDIA_INTF_T_ALSA_BASE + 3) -#define MEDIA_INTF_T_ALSA_RAWMIDI (MEDIA_INTF_T_ALSA_BASE + 4) -#define MEDIA_INTF_T_ALSA_HWDEP (MEDIA_INTF_T_ALSA_BASE + 5) -#define MEDIA_INTF_T_ALSA_SEQUENCER (MEDIA_INTF_T_ALSA_BASE + 6) -#define MEDIA_INTF_T_ALSA_TIMER (MEDIA_INTF_T_ALSA_BASE + 7) - /* Obsolete symbol for media_version, no longer used in the kernel */ #define MEDIA_API_VERSION ((0 << 16) | (1 << 8) | 0) From patchwork Fri Nov 2 00:31:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah X-Patchwork-Id: 10665807 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 8F56B3E9D for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 75A002C25D for ; Fri, 2 Nov 2018 16:07:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 698E12C2DD; Fri, 2 Nov 2018 16:07:05 +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=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E26E2A99A for ; Fri, 2 Nov 2018 16:07:03 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 5702F2679E4; Fri, 2 Nov 2018 16:42:01 +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 06C31267943; Fri, 2 Nov 2018 01:31:51 +0100 (CET) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by alsa0.perex.cz (Postfix) with ESMTP id 5829F267930 for ; Fri, 2 Nov 2018 01:31:49 +0100 (CET) Received: from localhost.localdomain (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0307920854; Fri, 2 Nov 2018 00:31:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541118708; bh=dlpQzEg9NOx58UDRhN2qpx3QN/i7xubIX9rDiEmj7Bw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=x9frNt6KdDA7KzA9i/+DaA97o/ZmPPYx0g655e0QX5WWiVvwETCDryzmcKgz366Fi 2B9tES0usHETnNcxjePjaoif8kdhpW7icQVpbCHD7grzfFaVqdkJ0JLBzuYQzqZmFG ahJdRvmJekVvK4c3xPfrcBRExZSs/taJyMis1L9E= From: shuah@kernel.org To: mchehab@kernel.org, perex@perex.cz, tiwai@suse.com Date: Thu, 1 Nov 2018 18:31:33 -0600 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Fri, 02 Nov 2018 16:41:51 +0100 Cc: alsa-devel@alsa-project.org, Shuah Khan , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [alsa-devel] [RFC PATCH v8 4/4] sound/usb: Use Media Controller API to share media resources 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 From: Shuah Khan Change ALSA driver to use Media Controller API to share media resources with DVB, and V4L2 drivers on a AU0828 media device. Media Controller specific initialization is done after sound card is registered. ALSA creates Media interface and entity function graph nodes for Control, Mixer, PCM Playback, and PCM Capture devices. snd_usb_hw_params() will call Media Controller enable source handler interface to request the media resource. If resource request is granted, it will release it from snd_usb_hw_free(). If resource is busy, -EBUSY is returned. Media specific cleanup is done in usb_audio_disconnect(). Signed-off-by: Shuah Khan --- sound/usb/Kconfig | 4 + sound/usb/Makefile | 2 + sound/usb/card.c | 14 ++ sound/usb/card.h | 3 + sound/usb/media.c | 320 +++++++++++++++++++++++++++++++++++++++ sound/usb/media.h | 73 +++++++++ sound/usb/mixer.h | 3 + sound/usb/pcm.c | 29 +++- sound/usb/quirks-table.h | 1 + sound/usb/stream.c | 2 + sound/usb/usbaudio.h | 6 + 11 files changed, 453 insertions(+), 4 deletions(-) create mode 100644 sound/usb/media.c create mode 100644 sound/usb/media.h diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig index f61b5662bb89..6319b544ba3a 100644 --- a/sound/usb/Kconfig +++ b/sound/usb/Kconfig @@ -15,6 +15,7 @@ config SND_USB_AUDIO select SND_RAWMIDI select SND_PCM select BITREVERSE + select SND_USB_AUDIO_USE_MEDIA_CONTROLLER if MEDIA_CONTROLLER && (MEDIA_SUPPORT=y || MEDIA_SUPPORT=SND_USB_AUDIO) help Say Y here to include support for USB audio and USB MIDI devices. @@ -22,6 +23,9 @@ config SND_USB_AUDIO To compile this driver as a module, choose M here: the module will be called snd-usb-audio. +config SND_USB_AUDIO_USE_MEDIA_CONTROLLER + bool + config SND_USB_UA101 tristate "Edirol UA-101/UA-1000 driver" select SND_PCM diff --git a/sound/usb/Makefile b/sound/usb/Makefile index d330f74c90e6..e1ce257ab705 100644 --- a/sound/usb/Makefile +++ b/sound/usb/Makefile @@ -18,6 +18,8 @@ snd-usb-audio-objs := card.o \ quirks.o \ stream.o +snd-usb-audio-$(CONFIG_SND_USB_AUDIO_USE_MEDIA_CONTROLLER) += media.o + snd-usbmidi-lib-objs := midi.o # Toplevel Module Dependency diff --git a/sound/usb/card.c b/sound/usb/card.c index 2bfe4e80a6b9..d9ae331280a2 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -68,6 +68,7 @@ #include "format.h" #include "power.h" #include "stream.h" +#include "media.h" MODULE_AUTHOR("Takashi Iwai "); MODULE_DESCRIPTION("USB Audio"); @@ -673,6 +674,11 @@ static int usb_audio_probe(struct usb_interface *intf, if (err < 0) goto __error; + if (quirk && quirk->media_device) { + /* don't want to fail when media_snd_device_create() fails */ + media_snd_device_create(chip, intf); + } + usb_chip[chip->index] = chip; chip->num_interfaces++; usb_set_intfdata(intf, chip); @@ -729,6 +735,14 @@ static void usb_audio_disconnect(struct usb_interface *intf) list_for_each(p, &chip->midi_list) { snd_usbmidi_disconnect(p); } + /* + * Nice to check quirk && quirk->media_device and + * then call media_snd_device_delete(). Don't have + * access to quirk here. media_snd_device_delete() + * acceses mixer_list + */ + media_snd_device_delete(chip); + /* release mixer resources */ list_for_each_entry(mixer, &chip->mixer_list, list) { snd_usb_mixer_disconnect(mixer); diff --git a/sound/usb/card.h b/sound/usb/card.h index ac785d15ced4..5dd3538ed6b5 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -108,6 +108,8 @@ struct snd_usb_endpoint { struct list_head list; }; +struct media_ctl; + struct snd_usb_substream { struct snd_usb_stream *stream; struct usb_device *dev; @@ -160,6 +162,7 @@ struct snd_usb_substream { } dsd_dop; bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */ + struct media_ctl *media_ctl; }; struct snd_usb_stream { diff --git a/sound/usb/media.c b/sound/usb/media.c new file mode 100644 index 000000000000..140a98eed294 --- /dev/null +++ b/sound/usb/media.c @@ -0,0 +1,320 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * media.c - Media Controller specific ALSA driver code + * + * Copyright (c) 2018 Shuah Khan + * + */ + +/* + * This file adds Media Controller support to ALSA driver + * to use the Media Controller API to share tuner with DVB + * and V4L2 drivers that control media device. Media device + * is created based on existing quirks framework. Using this + * approach, the media controller API usage can be added for + * a specific device. + */ + +#include +#include +#include +#include +#include + +#include +#include + +#include "usbaudio.h" +#include "card.h" +#include "mixer.h" +#include "media.h" + +int media_snd_stream_init(struct snd_usb_substream *subs, struct snd_pcm *pcm, + int stream) +{ + struct media_device *mdev; + struct media_ctl *mctl; + struct device *pcm_dev = &pcm->streams[stream].dev; + u32 intf_type; + int ret = 0; + u16 mixer_pad; + struct media_entity *entity; + + mdev = subs->stream->chip->media_dev; + if (!mdev) + return 0; + + if (subs->media_ctl) + return 0; + + /* allocate media_ctl */ + mctl = kzalloc(sizeof(*mctl), GFP_KERNEL); + if (!mctl) + return -ENOMEM; + + mctl->media_dev = mdev; + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + intf_type = MEDIA_INTF_T_ALSA_PCM_PLAYBACK; + mctl->media_entity.function = MEDIA_ENT_F_AUDIO_PLAYBACK; + mctl->media_pad.flags = MEDIA_PAD_FL_SOURCE; + mixer_pad = 1; + } else { + intf_type = MEDIA_INTF_T_ALSA_PCM_CAPTURE; + mctl->media_entity.function = MEDIA_ENT_F_AUDIO_CAPTURE; + mctl->media_pad.flags = MEDIA_PAD_FL_SINK; + mixer_pad = 2; + } + mctl->media_entity.name = pcm->name; + media_entity_pads_init(&mctl->media_entity, 1, &mctl->media_pad); + ret = media_device_register_entity(mctl->media_dev, + &mctl->media_entity); + if (ret) + goto free_mctl; + + mctl->intf_devnode = media_devnode_create(mdev, intf_type, 0, + MAJOR(pcm_dev->devt), + MINOR(pcm_dev->devt)); + if (!mctl->intf_devnode) { + ret = -ENOMEM; + goto unregister_entity; + } + mctl->intf_link = media_create_intf_link(&mctl->media_entity, + &mctl->intf_devnode->intf, + MEDIA_LNK_FL_ENABLED); + if (!mctl->intf_link) { + ret = -ENOMEM; + goto devnode_remove; + } + + /* create link between mixer and audio */ + media_device_for_each_entity(entity, mdev) { + switch (entity->function) { + case MEDIA_ENT_F_AUDIO_MIXER: + ret = media_create_pad_link(entity, mixer_pad, + &mctl->media_entity, 0, + MEDIA_LNK_FL_ENABLED); + if (ret) + goto remove_intf_link; + break; + } + } + + subs->media_ctl = mctl; + return 0; + +remove_intf_link: + media_remove_intf_link(mctl->intf_link); +devnode_remove: + media_devnode_remove(mctl->intf_devnode); +unregister_entity: + media_device_unregister_entity(&mctl->media_entity); +free_mctl: + kfree(mctl); + return ret; +} + +void media_snd_stream_delete(struct snd_usb_substream *subs) +{ + struct media_ctl *mctl = subs->media_ctl; + + if (mctl) { + struct media_device *mdev; + + mdev = mctl->media_dev; + if (mdev && media_devnode_is_registered(mdev->devnode)) { + media_devnode_remove(mctl->intf_devnode); + media_device_unregister_entity(&mctl->media_entity); + media_entity_cleanup(&mctl->media_entity); + } + kfree(mctl); + subs->media_ctl = NULL; + } +} + +int media_snd_start_pipeline(struct snd_usb_substream *subs) +{ + struct media_ctl *mctl = subs->media_ctl; + int ret = 0; + + if (!mctl) + return 0; + + mutex_lock(&mctl->media_dev->graph_mutex); + if (mctl->media_dev->enable_source) + ret = mctl->media_dev->enable_source(&mctl->media_entity, + &mctl->media_pipe); + mutex_unlock(&mctl->media_dev->graph_mutex); + return ret; +} + +void media_snd_stop_pipeline(struct snd_usb_substream *subs) +{ + struct media_ctl *mctl = subs->media_ctl; + + if (!mctl) + return; + + mutex_lock(&mctl->media_dev->graph_mutex); + if (mctl->media_dev->disable_source) + mctl->media_dev->disable_source(&mctl->media_entity); + mutex_unlock(&mctl->media_dev->graph_mutex); +} + +static int media_snd_mixer_init(struct snd_usb_audio *chip) +{ + struct device *ctl_dev = &chip->card->ctl_dev; + struct media_intf_devnode *ctl_intf; + struct usb_mixer_interface *mixer; + struct media_device *mdev = chip->media_dev; + struct media_mixer_ctl *mctl; + u32 intf_type = MEDIA_INTF_T_ALSA_CONTROL; + int ret; + + if (!mdev) + return -ENODEV; + + ctl_intf = chip->ctl_intf_media_devnode; + if (!ctl_intf) { + ctl_intf = media_devnode_create(mdev, intf_type, 0, + MAJOR(ctl_dev->devt), + MINOR(ctl_dev->devt)); + if (!ctl_intf) + return -ENOMEM; + chip->ctl_intf_media_devnode = ctl_intf; + } + + list_for_each_entry(mixer, &chip->mixer_list, list) { + + if (mixer->media_mixer_ctl) + continue; + + /* allocate media_mixer_ctl */ + mctl = kzalloc(sizeof(*mctl), GFP_KERNEL); + if (!mctl) + return -ENOMEM; + + mctl->media_dev = mdev; + mctl->media_entity.function = MEDIA_ENT_F_AUDIO_MIXER; + mctl->media_entity.name = chip->card->mixername; + mctl->media_pad[0].flags = MEDIA_PAD_FL_SINK; + mctl->media_pad[1].flags = MEDIA_PAD_FL_SOURCE; + mctl->media_pad[2].flags = MEDIA_PAD_FL_SOURCE; + media_entity_pads_init(&mctl->media_entity, MEDIA_MIXER_PAD_MAX, + mctl->media_pad); + ret = media_device_register_entity(mctl->media_dev, + &mctl->media_entity); + if (ret) { + kfree(mctl); + return ret; + } + + mctl->intf_link = media_create_intf_link(&mctl->media_entity, + &ctl_intf->intf, + MEDIA_LNK_FL_ENABLED); + if (!mctl->intf_link) { + media_device_unregister_entity(&mctl->media_entity); + media_entity_cleanup(&mctl->media_entity); + kfree(mctl); + return -ENOMEM; + } + mctl->intf_devnode = ctl_intf; + mixer->media_mixer_ctl = mctl; + } + return 0; +} + +static void media_snd_mixer_delete(struct snd_usb_audio *chip) +{ + struct usb_mixer_interface *mixer; + struct media_device *mdev = chip->media_dev; + + if (!mdev) + return; + + list_for_each_entry(mixer, &chip->mixer_list, list) { + struct media_mixer_ctl *mctl; + + mctl = mixer->media_mixer_ctl; + if (!mixer->media_mixer_ctl) + continue; + + if (media_devnode_is_registered(mdev->devnode)) { + media_device_unregister_entity(&mctl->media_entity); + media_entity_cleanup(&mctl->media_entity); + } + kfree(mctl); + mixer->media_mixer_ctl = NULL; + } + if (media_devnode_is_registered(mdev->devnode)) + media_devnode_remove(chip->ctl_intf_media_devnode); + chip->ctl_intf_media_devnode = NULL; +} + +int media_snd_device_create(struct snd_usb_audio *chip, + struct usb_interface *iface) +{ + struct media_device *mdev; + struct usb_device *usbdev = interface_to_usbdev(iface); + int ret; + + /* usb-audio driver is probed for each usb interface, and + * there are multiple interfaces per device. Avoid calling + * media_device_usb_allocate() each time usb_audio_probe() + * is called. Do it only once. + */ + if (chip->media_dev) + goto snd_mixer_init; + + mdev = media_device_usb_allocate(usbdev, KBUILD_MODNAME); + if (!mdev) + return -ENOMEM; + + if (!media_devnode_is_registered(mdev->devnode)) { + /* register media_device */ + ret = media_device_register(mdev); + if (ret) { + media_device_delete(mdev, KBUILD_MODNAME); + dev_err(&usbdev->dev, + "Couldn't register media device. Error: %d\n", + ret); + return ret; + } + } + + /* save media device - avoid lookups */ + chip->media_dev = mdev; + +snd_mixer_init: + /* Create media entities for mixer and control dev */ + ret = media_snd_mixer_init(chip); + if (ret) { + dev_err(&usbdev->dev, + "Couldn't create media mixer entities. Error: %d\n", + ret); + + /* clear saved media_dev */ + chip->media_dev = NULL; + + return ret; + } + return 0; +} + +void media_snd_device_delete(struct snd_usb_audio *chip) +{ + struct media_device *mdev = chip->media_dev; + struct snd_usb_stream *stream; + + /* release resources */ + list_for_each_entry(stream, &chip->pcm_list, list) { + media_snd_stream_delete(&stream->substream[0]); + media_snd_stream_delete(&stream->substream[1]); + } + + media_snd_mixer_delete(chip); + + if (mdev) { + media_device_delete(mdev, KBUILD_MODNAME); + chip->media_dev = NULL; + } +} diff --git a/sound/usb/media.h b/sound/usb/media.h new file mode 100644 index 000000000000..fbefa9cad215 --- /dev/null +++ b/sound/usb/media.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * media.h - Media Controller specific ALSA driver code + * + * Copyright (c) 2018 Shuah Khan + * + */ + +/* + * This file adds Media Controller support to ALSA driver + * to use the Media Controller API to share tuner with DVB + * and V4L2 drivers that control media device. Media device + * is created based on existing quirks framework. Using this + * approach, the media controller API usage can be added for + * a specific device. + */ +#ifndef __MEDIA_H + +#ifdef CONFIG_SND_USB_AUDIO_USE_MEDIA_CONTROLLER + +#include +#include +#include +#include +#include + +struct media_ctl { + struct media_device *media_dev; + struct media_entity media_entity; + struct media_intf_devnode *intf_devnode; + struct media_link *intf_link; + struct media_pad media_pad; + struct media_pipeline media_pipe; +}; + +/* + * One source pad each for SNDRV_PCM_STREAM_CAPTURE and + * SNDRV_PCM_STREAM_PLAYBACK. One for sink pad to link + * to AUDIO Source + */ +#define MEDIA_MIXER_PAD_MAX (SNDRV_PCM_STREAM_LAST + 2) + +struct media_mixer_ctl { + struct media_device *media_dev; + struct media_entity media_entity; + struct media_intf_devnode *intf_devnode; + struct media_link *intf_link; + struct media_pad media_pad[MEDIA_MIXER_PAD_MAX]; + struct media_pipeline media_pipe; +}; + +int media_snd_device_create(struct snd_usb_audio *chip, + struct usb_interface *iface); +void media_snd_device_delete(struct snd_usb_audio *chip); +int media_snd_stream_init(struct snd_usb_substream *subs, struct snd_pcm *pcm, + int stream); +void media_snd_stream_delete(struct snd_usb_substream *subs); +int media_snd_start_pipeline(struct snd_usb_substream *subs); +void media_snd_stop_pipeline(struct snd_usb_substream *subs); +#else +static inline int media_snd_device_create(struct snd_usb_audio *chip, + struct usb_interface *iface) + { return 0; } +static inline void media_snd_device_delete(struct snd_usb_audio *chip) { } +static inline int media_snd_stream_init(struct snd_usb_substream *subs, + struct snd_pcm *pcm, int stream) + { return 0; } +static inline void media_snd_stream_delete(struct snd_usb_substream *subs) { } +static inline int media_snd_start_pipeline(struct snd_usb_substream *subs) + { return 0; } +static inline void media_snd_stop_pipeline(struct snd_usb_substream *subs) { } +#endif +#endif /* __MEDIA_H */ diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h index 3d12af8bf191..394cd9107507 100644 --- a/sound/usb/mixer.h +++ b/sound/usb/mixer.h @@ -4,6 +4,8 @@ #include +struct media_mixer_ctl; + struct usb_mixer_interface { struct snd_usb_audio *chip; struct usb_host_interface *hostif; @@ -23,6 +25,7 @@ struct usb_mixer_interface { struct urb *rc_urb; struct usb_ctrlrequest *rc_setup_packet; u8 rc_buffer[6]; + struct media_mixer_ctl *media_mixer_ctl; bool disconnected; }; diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 382847154227..a1971a87c613 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -35,6 +35,7 @@ #include "pcm.h" #include "clock.h" #include "power.h" +#include "media.h" #define SUBSTREAM_FLAG_DATA_EP_STARTED 0 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 @@ -776,6 +777,10 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream, struct audioformat *fmt; int ret; + ret = media_snd_start_pipeline(subs); + if (ret) + return ret; + if (snd_usb_use_vmalloc) ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); @@ -783,7 +788,7 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream, ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (ret < 0) - return ret; + goto stop_pipeline; subs->pcm_format = params_format(hw_params); subs->period_bytes = params_period_bytes(hw_params); @@ -797,12 +802,13 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream, dev_dbg(&subs->dev->dev, "cannot set format: format = %#x, rate = %d, channels = %d\n", subs->pcm_format, subs->cur_rate, subs->channels); - return -EINVAL; + ret = -EINVAL; + goto stop_pipeline; } ret = snd_usb_lock_shutdown(subs->stream->chip); if (ret < 0) - return ret; + goto stop_pipeline; ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); if (ret < 0) @@ -818,6 +824,12 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream, unlock: snd_usb_unlock_shutdown(subs->stream->chip); + if (ret < 0) + goto stop_pipeline; + return ret; + + stop_pipeline: + media_snd_stop_pipeline(subs); return ret; } @@ -830,6 +842,7 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs = substream->runtime->private_data; + media_snd_stop_pipeline(subs); subs->cur_audiofmt = NULL; subs->cur_rate = 0; subs->period_bytes = 0; @@ -1302,6 +1315,7 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream) struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = &as->substream[direction]; + int ret; subs->interface = -1; subs->altset_idx = 0; @@ -1315,7 +1329,13 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream) subs->dsd_dop.channel = 0; subs->dsd_dop.marker = 1; - return setup_hw_info(runtime, subs); + ret = setup_hw_info(runtime, subs); + if (ret == 0) { + ret = media_snd_stream_init(subs, as->pcm, direction); + if (ret) + snd_usb_autosuspend(subs->stream->chip); + } + return ret; } static int snd_usb_pcm_close(struct snd_pcm_substream *substream) @@ -1326,6 +1346,7 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream) int ret; stop_endpoints(subs, true); + media_snd_stop_pipeline(subs); if (!as->chip->keep_iface && subs->interface >= 0 && diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h index 08aa78007020..02789d1b2fec 100644 --- a/sound/usb/quirks-table.h +++ b/sound/usb/quirks-table.h @@ -2887,6 +2887,7 @@ YAMAHA_DEVICE(0x7010, "UB99"), .product_name = pname, \ .ifnum = QUIRK_ANY_INTERFACE, \ .type = QUIRK_AUDIO_ALIGN_TRANSFER, \ + .media_device = 1, \ } \ } diff --git a/sound/usb/stream.c b/sound/usb/stream.c index 67cf849aa16b..5439dd2e6980 100644 --- a/sound/usb/stream.c +++ b/sound/usb/stream.c @@ -38,6 +38,7 @@ #include "clock.h" #include "stream.h" #include "power.h" +#include "media.h" /* * free a substream @@ -55,6 +56,7 @@ static void free_substream(struct snd_usb_substream *subs) } kfree(subs->rate_list.list); kfree(subs->str_pd); + media_snd_stream_delete(subs); } diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index b9faeca645fd..72bdae5ca54a 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -30,6 +30,9 @@ * */ +struct media_device; +struct media_intf_devnode; + struct snd_usb_audio { int index; struct usb_device *dev; @@ -66,6 +69,8 @@ struct snd_usb_audio { */ struct usb_host_interface *ctrl_intf; /* the audio control interface */ + struct media_device *media_dev; + struct media_intf_devnode *ctl_intf_media_devnode; }; #define usb_audio_err(chip, fmt, args...) \ @@ -117,6 +122,7 @@ struct snd_usb_audio_quirk { const char *profile_name; /* override the card->longname */ int16_t ifnum; uint16_t type; + bool media_device; const void *data; };