From patchwork Mon Jun 10 23:57:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13692676 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 C59CE155C8F; Mon, 10 Jun 2024 23:58:45 +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=1718063931; cv=none; b=cZ2tzpa0XNg8LWzdvbKm3NcaVzD/B1ZLkjVj24OaQgzXr1LAhcf9MplZ3GZFeWAACneWWTOxUsm+/l2CKv10W3KVC0gMtpkk0Tbwjv6CpRNTvrCf1Xlc10AMuyKfDMfNDuBDYQTh37tq6VO8mauvoQINI2ShMwv0SJq+1GEOwiY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718063931; c=relaxed/simple; bh=T0rbnP/f/g7Q7AIERZ2Oa2F44xR2m7fOnma3+I2NtzI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ExRIjA/cRH1LQPe4wDASbhTW4BN3F/nRQg8u3Eoz3SUZ+o0Vk42R4WGq5SKM3WCu2rX1BHxDudPyteiIhnzQJSlrwgcbHXQfVwiEgL7J842VRut5beavt+2KnJ+BiYMB+WmgUDE22nZRMOp5TOp6zl7YEXbFiVpxS07zimROyqM= 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=A59FgSUh; 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="A59FgSUh" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 45AF0XFq003385; Mon, 10 Jun 2024 23:58:24 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=qcppdkim1; bh=ALKChmnJWTQf/1MeQFcbrLDZ X14CSLUY/lp63tANbUI=; b=A59FgSUhQ6q7rSEqIGwr0m9b/RYglswFKNPRr0Ss C6Nga+D3NLxP2yrpNCbzXEtJgxJHnSXrEvxZGUFhJ0hz6VMwCRLd6wekbFHW+mgc zz9oGAb1jdiBJHsfFiQ+cqj1yX3CCUHHCSblxJbRulyxnhN9cWlopY1hWBCO3hpo LaXsGsYoQSupR3/h32zDYH3flnL5hHqzcqk+ICcraomoxKPLazotlGnWPLmD5OWm 29rHi/wiBvNvC3/bjgZNWOr1qNm+Hzn/1jls7xg3NjVigrTc1ixD7v7ZP668FMF7 12xa2VNR6WSSuZaOfwkn3yw+MO9o0r0h4izrdw8gXP4LOg== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3yme8rwbyr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Jun 2024 23:58:24 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA01.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 45ANwM25007376 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Jun 2024 23:58:23 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 15.2.1544.9; Mon, 10 Jun 2024 16:58:22 -0700 From: Wesley Cheng To: , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v23 13/32] ALSA: usb-audio: Check for support for requested audio format Date: Mon, 10 Jun 2024 16:57:49 -0700 Message-ID: <20240610235808.22173-14-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240610235808.22173-1-quic_wcheng@quicinc.com> References: <20240610235808.22173-1-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: 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: VUxvhRi21BpAVoPGIfFTy1c0dPZtyZn7 X-Proofpoint-GUID: VUxvhRi21BpAVoPGIfFTy1c0dPZtyZn7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-10_07,2024-06-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 suspectscore=0 bulkscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 mlxlogscore=999 impostorscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406100177 Allow for checks on a specific USB audio device to see if a requested PCM format is supported. This is needed for support when playback is initiated by the ASoC USB backend path. Signed-off-by: Wesley Cheng --- sound/usb/card.c | 31 +++++++++++++++++++++++++++++++ sound/usb/card.h | 3 +++ 2 files changed, 34 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 8f1051e1716e..fb548a3abcfc 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -155,6 +155,37 @@ int snd_usb_unregister_platform_ops(void) } EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); +/* + * Checks to see if requested audio profile, i.e sample rate, # of + * channels, etc... is supported by the substream associated to the + * USB audio device. + */ +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction) +{ + struct snd_usb_audio *chip; + struct snd_usb_substream *subs; + struct snd_usb_stream *as; + + /* + * Register mutex is held when populating and clearing usb_chip + * array. + */ + guard(mutex)(®ister_mutex); + chip = usb_chip[card_idx]; + + if (chip && enable[card_idx]) { + list_for_each_entry(as, &chip->pcm_list, list) { + subs = &as->substream[direction]; + if (snd_usb_find_substream_format(subs, params)) + return as; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream); + /* * disconnect streams * called from usb_audio_disconnect() diff --git a/sound/usb/card.h b/sound/usb/card.h index 02e4ea898db5..d66cc0b139af 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -217,4 +217,7 @@ struct snd_usb_platform_ops { int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); + +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction); #endif /* __USBAUDIO_CARD_H */