From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 833D0C43381 for ; Sat, 30 Mar 2019 01:54:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5050E2184C for ; Sat, 30 Mar 2019 01:54:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553910880; bh=kGlzYNvnx2j57Yy5KzGg35jicf7vTPu7Xw0BB8/0CGk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=RHmIS8UjEognDNa9mR2i2QtmifnETX5f1TGTBIFH02VIkZGLoCHHlcvQCXAGVPhqd J6gqijzI7P/DufD6GZs+B+7vr5xVgCsk8Vzw767rCJ+euEUPGKxvVpFpSDpI/8AL4c sfi9qFjptNZsubHgmQOlycNieWOYyuMoNi7BiKVo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730649AbfC3Byj (ORCPT ); Fri, 29 Mar 2019 21:54:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:52306 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730104AbfC3ByG (ORCPT ); Fri, 29 Mar 2019 21:54:06 -0400 Received: from shuah-t480s.internal (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 3B3D4218E2; Sat, 30 Mar 2019 01:54:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553910845; bh=kGlzYNvnx2j57Yy5KzGg35jicf7vTPu7Xw0BB8/0CGk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gRkJzDGx350qAirDmrkO10Sv2ihYHeIYd5mF20cIkDaJz4ScFrm4e8aFKA/GfgPxA Yut9g62P6N6gAwcp7J8xaK43gxumY375NJknyNvauCrdo23B/P+l2/AV6b5NEL0lof 462SaNeCYM9DdPp5xg0mG9DnsA4h2Lj8MGuxKhdA= From: Shuah Khan To: mchehab@kernel.org, perex@perex.cz, tiwai@suse.com, hverkuil@xs4all.nl Cc: Shuah Khan , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org Subject: [PATCH v14 2/6] media: change au0828 to use Media Device Allocator API Date: Fri, 29 Mar 2019 19:53:57 -0600 Message-Id: X-Mailer: git-send-email 2.19.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Media Device Allocator API to allows multiple drivers share a media device. This API solves a very common use-case for media devices where one physical device (an USB stick) provides both audio and video. When such media device exposes a standard USB Audio class, a proprietary Video class, two or more independent drivers will share a single physical USB bridge. In such cases, it is necessary to coordinate access to the shared resource. 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. 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/Kconfig | 2 ++ drivers/media/usb/au0828/au0828-core.c | 13 +++++-------- drivers/media/usb/au0828/au0828.h | 1 + 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/media/usb/au0828/Kconfig b/drivers/media/usb/au0828/Kconfig index 65fc067eb864..98de6e24329e 100644 --- a/drivers/media/usb/au0828/Kconfig +++ b/drivers/media/usb/au0828/Kconfig @@ -2,6 +2,8 @@ config VIDEO_AU0828 tristate "Auvitek AU0828 support" depends on I2C && INPUT && DVB_CORE && USB && VIDEO_V4L2 + select MEDIA_CONTROLLER + select MEDIA_CONTROLLER_DVB select I2C_ALGOBIT select VIDEO_TVEEPROM select VIDEOBUF2_VMALLOC if VIDEO_V4L2 diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c index 3f8c92a70116..4f8ba6f64d3c 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, THIS_MODULE); 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, THIS_MODULE); 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; @@ -480,6 +474,9 @@ 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, + THIS_MODULE); + 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 425c35d16057..57b00de8d3f2 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 -- 2.17.1