From patchwork Wed Feb 28 01:35:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13574755 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 145D523777; Wed, 28 Feb 2024 01:36:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709084219; cv=none; b=Lq0JWOe50SXFPu8mHvU1w1ICUP7xN7KRuFzaBf2+42u8E8ZNPgqquxuy+ml4AYgpOsd/5g3ltJZMEnJ6tPNUfwyByiapxiqOfwZuj0V7LSXlGwuIhsZ7YRz5KyLjNaOC55BGcyGHLJ6YpsgVl0h+6fM25JrZCBcfvgbRmM620Us= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709084219; c=relaxed/simple; bh=NFb5KrutHq3DEtEEDYwpfG5twPMjHvzujusJINVO7hw=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=vFQ6NaFhF6fBtDS/7YvYlqEkqtq7ZqWHkr52jKuljhynRtOPBGOOi6aIxG4EdrQlrfIl2LkUi0paWtELQScDOmCmNPwwVUx5hRZbWkEM86wrhE5HcY+EyZqVWECxIEWqpaaVq5WrhbSJXRhPsO085EnmdFd0pqtxitDdo+RC7iU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=cTsEOo36; arc=none smtp.client-ip=205.220.168.131 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="cTsEOo36" 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 41S0VFqW016701; Wed, 28 Feb 2024 01:36:34 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=S9VTWxSz7x4qq1AeYZyZ G+OFcZ7lvmr3A4Wyz4IN404=; b=cTsEOo36OVL6tBKDKvJOME/EiZ54QdTSikaJ SPQA1U2rF15sZT2hraKdfN0zSeZQT6vjvYs2Tayhg+0SzASiOKNDkiTiUZwBeFr4 kgX1onsgCyFECRps2YvEvqrkboyY+DQvh77CBeYHWsP2rwOBZhdbmLhBiPcu7SG4 m6m1nCUGlg/wyuQ9xx+kVUDqBIXlEa5x3RX//GmGVLgC46rZ0Ml/6M1htky91ved pGIUonrch+2+0AvzHRXXfDklKmh/Ngd2DNEg7K0d/7t2Q7gTEWYYipDsuz9txyBY UMYDJgPqiUGxetiQ33E01i0EGYOp2dIKERZ3Opc6gLZAJ9D8AQ== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3whtbw836w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Feb 2024 01:36:33 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 41S1aXnj029848 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Feb 2024 01:36:33 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; Tue, 27 Feb 2024 17:36:32 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v18 14/41] ALSA: usb-audio: Introduce USB SND platform op callbacks Date: Tue, 27 Feb 2024 17:35:52 -0800 Message-ID: <20240228013619.29758-15-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240228013619.29758-1-quic_wcheng@quicinc.com> References: <20240228013619.29758-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) 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-GUID: CwA1gYqsTDfVmIlDogeRBx4E2FDuuFC6 X-Proofpoint-ORIG-GUID: CwA1gYqsTDfVmIlDogeRBx4E2FDuuFC6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-27_11,2024-02-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 spamscore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402280010 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 | 53 ++++++++++++++++++++++++++++++++++++++++++++++++ sound/usb/card.h | 9 ++++++++ 2 files changed, 62 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 1b2edc0fd2e9..ca4f3bc1b42d 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -118,6 +118,42 @@ 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) +{ + guard(mutex)(®ister_mutex); + if (platform_ops) + return -EEXIST; + + platform_ops = ops; + 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) +{ + guard(mutex)(®ister_mutex); + platform_ops = NULL; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); /* * disconnect streams @@ -910,7 +946,11 @@ 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 +987,9 @@ 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 +1133,11 @@ 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 +1178,11 @@ 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 */