From patchwork Wed Dec 20 22:45:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 181832 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:2483:b0:fb:cd0c:d3e with SMTP id q3csp58171dyi; Wed, 20 Dec 2023 14:59:00 -0800 (PST) X-Google-Smtp-Source: AGHT+IH4aKYqwN6+/IIyzTZXsBoiCvTJOYR9wHK+R6k5ur8nL6Cq5L211KNvbBBENTjxN8QB7zp7 X-Received: by 2002:a05:6a20:7346:b0:18f:97c:9770 with SMTP id v6-20020a056a20734600b0018f097c9770mr431160pzc.88.1703113140351; Wed, 20 Dec 2023 14:59:00 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1703113140; cv=none; d=google.com; s=arc-20160816; b=Vog2VofdlGuoz20z2ctL5zHaXASrFW5Gk1WRDGTs5KRSKYnMrHD2ebQIAHZBWnib/p +J4dnTUoAj06oCKauAIAnnHE0QBzGt4uDPz21FSqJ3GLHWPJUwG6/mnjOIEWNI7Sdn8p K3vjPi8mP/Re+WIwocE4jRr4CmPCk0fqHHS7O1qWOABkhN/tHgLiO0CEeN411eYMNnbW J5AjH0GwAkBseKCpKHws9hOD80OgsQ1U3kdNuUbEJjM7UbdiN07HS1vwO1xUznQJS7S3 KgOrw04VW2oJq98oeBjS03oeQTKepD3mQ+JzXYtuTz5iyarS/Oil6dA2tYgfGkYlp93G d3ug== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:list-unsubscribe:list-subscribe:list-id:precedence :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=soLP1wxYe/Q2Qo2eRZtDOZ0+xrFrE1vGLjGfET0ejzk=; fh=0KzismZj+xI0Z//ZGdqKIH/FO9LtSZM7Yj4P0VtrCz0=; b=zDvLhJroB91itJp+De7bV0tVxMX1TU8CQ5IDN3XdpmxuxsWxnlVMfKdZfH+te9uihK C+LTpLCsq872pB4MCDvdPIfhu7C5xeUpheNlrDhUZCHUAu/h//JzYNK/U7yb8hpGDCJP y56wRT51FzPDUeDMwN9KoyrtBYAykocoBJDVkS+QntSZGqqSKgDy6vkjWbgt5MC+BHKz XYvVCJTI1LxhEvB9cZjYoclz93y8vN4TsLSLmZkOdaE9EH8LtTMuQb3OohoGLTIf7pXp VdJxyV+CXBjlElXby9OzknSy9yVRKN5cmN6/3qGnLxlFCO1UYyXJdo57mFHFn0n6Htzv H7jg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=RGy259DZ; spf=pass (google.com: domain of linux-kernel+bounces-7551-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) smtp.mailfrom="linux-kernel+bounces-7551-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: from sy.mirrors.kernel.org (sy.mirrors.kernel.org. [147.75.48.161]) by mx.google.com with ESMTPS id z64-20020a636543000000b005cdaa0544cfsi428948pgb.670.2023.12.20.14.58.59 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Dec 2023 14:59:00 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-7551-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161; Authentication-Results: mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=RGy259DZ; spf=pass (google.com: domain of linux-kernel+bounces-7551-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) smtp.mailfrom="linux-kernel+bounces-7551-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sy.mirrors.kernel.org (Postfix) with ESMTPS id EF8A3B245FA for ; Wed, 20 Dec 2023 22:54:49 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CC09C55C09; Wed, 20 Dec 2023 22:46:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="RGy259DZ" X-Original-To: linux-kernel@vger.kernel.org Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 311E14F5F2; Wed, 20 Dec 2023 22:46:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BKMjwNH008552; Wed, 20 Dec 2023 22:45:58 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; s=qcppdkim1; bh=soLP1wxYe/Q2Qo2eRZtD OZ0+xrFrE1vGLjGfET0ejzk=; b=RGy259DZRyZG7tPISi2Lg7oUsA13s/G9ihP5 AZPDqHC7Lyc9h6KE+LyBWKy4+qhBpT0Roz/OsrV8FaBGUzOt3hlwgHkMQL7XLCVI EIoy6X3f/LRilRbSompEh6LlFzKUoBF+sKIlNMq/hfixinU7axmvzCYx8fUySFMi Z2sio7cM551LoSk5dvPRG34r+uM56uSxDYmH7sMowIlL6BETKp0yBTuNp3zbp+iX qpdmvDyJbfbfPCstKC7LGJpeZOK/3HoBO0ZtCHId18AURHFEZZwa5i2J71vzql/9 pL5eNWHEBaxVVkqaac6cciMXDfpTi6pwfChz3QRZDoKL8beXhg== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v3r6rtn58-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 20 Dec 2023 22:45:57 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BKMjvLT008292 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 20 Dec 2023 22:45:57 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Wed, 20 Dec 2023 14:45:56 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v11 11/41] ALSA: usb-audio: Introduce USB SND platform op callbacks Date: Wed, 20 Dec 2023 14:45:14 -0800 Message-ID: <20231220224544.18031-12-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231220224544.18031-1-quic_wcheng@quicinc.com> References: <20231220224544.18031-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: MIAVunCDK9-PYoYb0kfL3v8tZBMR-nkE X-Proofpoint-GUID: MIAVunCDK9-PYoYb0kfL3v8tZBMR-nkE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 mlxscore=0 mlxlogscore=921 clxscore=1015 malwarescore=0 suspectscore=0 spamscore=0 priorityscore=1501 lowpriorityscore=0 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312200163 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1785843564338361920 X-GMAIL-MSGID: 1785843564338361920 Allow for different platforms to be notified on USB SND connect/disconnect seqeunces. This allows for platform USB SND modules to properly initialize and populate internal structures with references to the USB SND chip device. Signed-off-by: Wesley Cheng --- sound/usb/card.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++ sound/usb/card.h | 9 ++++++++ 2 files changed, 69 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 1b2edc0fd2e9..1ef6d144aa51 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -118,6 +118,49 @@ MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no) static DEFINE_MUTEX(register_mutex); static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; static struct usb_driver usb_audio_driver; +static struct snd_usb_platform_ops *platform_ops; + +/* + * Register platform specific operations that will be notified on events + * which occur in USB SND. The platform driver can utilize this path to + * enable features, such as USB audio offloading, which allows for audio data + * to be queued by an audio DSP. + * + * Only one set of platform operations can be registered to USB SND. The + * platform register operation is protected by the register_mutex. + */ +int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops) +{ + int ret; + + mutex_lock(®ister_mutex); + if (platform_ops) { + ret = -EEXIST; + goto out; + } + + platform_ops = ops; +out: + mutex_unlock(®ister_mutex); + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops); + +/* + * Unregisters the current set of platform operations. This allows for + * a new set to be registered if required. + * + * The platform unregister operation is protected by the register_mutex. + */ +int snd_usb_unregister_platform_ops(void) +{ + mutex_lock(®ister_mutex); + platform_ops = NULL; + mutex_unlock(®ister_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); /* * disconnect streams @@ -910,7 +953,11 @@ static int usb_audio_probe(struct usb_interface *intf, chip->num_interfaces++; usb_set_intfdata(intf, chip); atomic_dec(&chip->active); + + if (platform_ops && platform_ops->connect_cb) + platform_ops->connect_cb(chip); mutex_unlock(®ister_mutex); + return 0; __error: @@ -947,6 +994,9 @@ static void usb_audio_disconnect(struct usb_interface *intf) card = chip->card; mutex_lock(®ister_mutex); + if (platform_ops && platform_ops->disconnect_cb) + platform_ops->disconnect_cb(chip); + if (atomic_inc_return(&chip->shutdown) == 1) { struct snd_usb_stream *as; struct snd_usb_endpoint *ep; @@ -1090,6 +1140,11 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) chip->system_suspend = chip->num_suspended_intf; } + mutex_lock(®ister_mutex); + if (platform_ops && platform_ops->suspend_cb) + platform_ops->suspend_cb(intf, message); + mutex_unlock(®ister_mutex); + return 0; } @@ -1130,6 +1185,11 @@ static int usb_audio_resume(struct usb_interface *intf) snd_usb_midi_v2_resume_all(chip); + mutex_lock(®ister_mutex); + if (platform_ops && platform_ops->resume_cb) + platform_ops->resume_cb(intf); + mutex_unlock(®ister_mutex); + out: if (chip->num_suspended_intf == chip->system_suspend) { snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); diff --git a/sound/usb/card.h b/sound/usb/card.h index 6ec95b2edf86..2884912adc96 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -207,4 +207,13 @@ struct snd_usb_stream { struct list_head list; }; +struct snd_usb_platform_ops { + void (*connect_cb)(struct snd_usb_audio *chip); + void (*disconnect_cb)(struct snd_usb_audio *chip); + void (*suspend_cb)(struct usb_interface *intf, pm_message_t message); + void (*resume_cb)(struct usb_interface *intf); +}; + +int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); +int snd_usb_unregister_platform_ops(void); #endif /* __USBAUDIO_CARD_H */