From patchwork Fri Aug 23 20:00:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13775889 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 8F290192B91; Fri, 23 Aug 2024 20:01:53 +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=1724443315; cv=none; b=FBjbqAH1enPDxQvpaPZxk7uJgPzVLQ1hR2oh7gsYEz1FCZUj8EGklw0JXxeJwHgkSUxAhHM6IBw6OAYMDKyJ5t+AM/ZVhQEUAi3IDd7JFSIQu9CZKeDqPfuYcDUwTlsabGpx8jcnpK1Z3OMoDraQGbxcm8UJD2iDOQBct+u0dJ0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724443315; c=relaxed/simple; bh=GCHhDH93tEzc6aJAY4WyIAsLqMNS7Wdd5LM2j47ccyc=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Hj0BcDZ6ErR18GsR1tH1JlaHtjDDFPZZp08dk6XaoMBVs0km6Fy0yCAeJmSvdKqOp7QU882ak9hIS6s0j/xmRn77lD/ucE3pdifHP0/9ZLzRNm+tnunDytafGx9N7CWlZxk29c6QJ12DMerBgq757RMwiQUKGq2r1GdBwwhE3wc= 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=DWjCCnVh; 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="DWjCCnVh" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47NAQ9vO019828; Fri, 23 Aug 2024 20:01:18 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=DxpdgXMEdQe12k/++CAWQQ9P 0/ROYKPrtDwkT0lWl+k=; b=DWjCCnVha3AYAlTG33vw9M9vphuAfxRgptculjes keqF1mlA95VLNor6Fub6bd6B0Xd7NIpJptFgF3KLvZ7sYsTxOdJT/bcyyk6enQcq RagKGcWOkJvQrwU9lDe2t+CM+ho4uouycZiVdao62Y6X01gUn1boQsgDlXe5Xjk5 egRh5I99JSgxY0s2/2XqPOP6SuVUGtwF8DMqEecOWLP3LFJpcTJjPXYrD2OTJK33 0N6ruxByAM6qqyKe1p8pwv7KTAlglNrXNtLiS8l1WHdX++u+s8oLUqoUIKUoZxqz 6ISLaV6U1V/Y1hgcYaqIVOulU7A0c84aEqXjDs0ln+NMbQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 415bkwgy6g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 23 Aug 2024 20:01:17 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 47NK1GJ2001640 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 23 Aug 2024 20:01:16 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; Fri, 23 Aug 2024 13:01:16 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , CC: , , , , , , , , Wesley Cheng Subject: [PATCH v25 11/33] ALSA: usb-audio: Check for support for requested audio format Date: Fri, 23 Aug 2024 13:00:39 -0700 Message-ID: <20240823200101.26755-12-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240823200101.26755-1-quic_wcheng@quicinc.com> References: <20240823200101.26755-1-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: LoMLfcCW2DUgt6yo-RTIx0IRG9-1qysr X-Proofpoint-GUID: LoMLfcCW2DUgt6yo-RTIx0IRG9-1qysr 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=2024-08-23_16,2024-08-23_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 bulkscore=0 malwarescore=0 priorityscore=1501 adultscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408230147 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 | 2 ++ 2 files changed, 33 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index c6d9d8d548b4..4f9f5a87fb79 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -119,6 +119,37 @@ static DEFINE_MUTEX(register_mutex); static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; static struct usb_driver usb_audio_driver; +/* + * 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 6ec95b2edf86..62302d15e18f 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -207,4 +207,6 @@ struct snd_usb_stream { struct list_head list; }; +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction); #endif /* __USBAUDIO_CARD_H */