From patchwork Fri May 24 00:10:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13672545 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 113D27FB; Fri, 24 May 2024 00:11:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716509479; cv=none; b=AbGkxqRimwbkPeBypn7wxlhxY1rhOjzhcsvnHXSI9fXeAzb0dVOLjLhPw8i/fngRonkXASMdanMmb7gTrM1h0aqSyzjlhIXpUNDf+csdn0f2hyKMb7rrk3gH/cuJXMzpLBgggmNAsf/SLLPKEeXiO90QvRaIMMK51/QJsjeA+p8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716509479; 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=bgBdOlUWObc0yNShYyzNSK4Rkx1dHM8+BAB7Cbi32Yp3J5WeVi/Rq329O1h11J7FkaYGGeWxAeKYIrhJ8bTIsI6T/MH2tqK3OrG037v+wNdcjW6NxmdR7WjxtBJoe89fJFsiP3kuD5dZtghWuUqV8BGxXBt1uZCpR4aFGv4WSCQ= 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=jsrQFARZ; arc=none smtp.client-ip=205.220.180.131 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="jsrQFARZ" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 44NNPtkN013094; Fri, 24 May 2024 00:11:01 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=jsrQFARZppJOP5dHd9Q35uyCZitd+6InPFSjaY4c MQKXR/Cky864vDnAI+F/ab9MSaaU8iuA8n4WFPOB4v/FO++86gIUb81rj+5aWHwx ENRloqTV0XL2eaFJeXX2v/RV7VlrG95hfwQpeaYXpRJTeh/HNtRkUCWjiQa6tdzo UC6LTIjEH5aCTWdR3KykYpbk6JCjPSStvA9aIP7WJBvXlzNIDViI3wSxvmS68cGD WgePzW/7XHlaX3J0O9258pGgy6Ng4iIe6w1VHQMSSnUIuO0PWl2Sd9TOrwvafA2u aR64ZHZkw8bD35dlfTV0ExvCmRebqk8CljKv9HDn6uOz+w== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3yaa97rqnh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 May 2024 00:11:01 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 44O0B0EZ001747 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 May 2024 00:11:00 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; Thu, 23 May 2024 17:11:00 -0700 From: Wesley Cheng To: , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v22 19/38] ALSA: usb-audio: Check for support for requested audio format Date: Thu, 23 May 2024 17:10:24 -0700 Message-ID: <20240524001043.10141-20-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240524001043.10141-1-quic_wcheng@quicinc.com> References: <20240524001043.10141-1-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: LoWKiPBgMYcK_nyn4HwJ9WV4Id1sQkxi X-Proofpoint-ORIG-GUID: LoWKiPBgMYcK_nyn4HwJ9WV4Id1sQkxi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-05-23_13,2024-05-23_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 spamscore=0 phishscore=0 impostorscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2405230166 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 */