From patchwork Wed Sep 25 00:59:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13811510 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 472FE13AA38; Wed, 25 Sep 2024 01:00:55 +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=1727226056; cv=none; b=oRe1aI94shRGp2Q8w8YUV1oFybkMVOGQmvsmTNdUf5DTGBtVbClaQ+3RiHNMmSbzaNGuGjgO0KEafwE8qjwNL5bKTigjdstNoV+yX5Kve2WUEHEhK4bi+AIVKbYSVac9uBHyl329Fi94Ott2HREF5jPoB5wFwv3aToR80rgDK6k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727226056; c=relaxed/simple; bh=29VWA0DxT8hK6fkCwQrxvdJBmifY1Kc1/JCR3kgrfD8=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=B3llOX+ecSi2JoOW0e4e36eTBS6CNuroMorbGHdp2kQHibiBZ27V7kfgKsz+2CF/Xn820ut1iidO1Bg81s5NR5nWBjwOwJYtWPBeBzfHzYpFQqPbJ5fomMgvlP2XS9TkJX9PAMeVEoBqiHCdC5ABS4zvQPPurbYk9QL6B1xZuMc= 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=Ykb8MUlM; 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="Ykb8MUlM" Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 48OIkFbR032044; Wed, 25 Sep 2024 01:00:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= s/OTeliDf1Ah9/XP4Pomi7vIYaEPF2MJpZ2JrUJEjg8=; b=Ykb8MUlMoJgYtCKg y78goUlRE7E/PoPFVIaONXzaCJD66JJBy1Z8c/aH0nG3pYivrhDsStcwtHbsJVmH WQTJgloNw7ybp157II9MMw92ZEH0LYk06uUMhRy5/jr0aEg3kjOWegoTS29VUWol Y82bD94eSFOVXtzgVJk2mTDw0K4SHJT+IH/aUSqBD/6n3xjtqWXLsngpi18GuZ83 NRnh8s2Cb/m+QqYKCS+LZf3yUOYp7UDdikoc9l2mKxRBX6B3cqx/KnLktUZ7M4A1 ab47tPoMG0FsGpSoiZ0QgwBJoomWrO56BjTXmP51OaoYe3tJ3uyoKzUDNhIiOphQ jcYrhg== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 41sp7ujj7q-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 25 Sep 2024 01:00:15 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 48P10E1h018666 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 25 Sep 2024 01:00:14 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; Tue, 24 Sep 2024 18:00:14 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , , Wesley Cheng Subject: [PATCH v28 11/32] ALSA: usb-audio: Check for support for requested audio format Date: Tue, 24 Sep 2024 17:59:39 -0700 Message-ID: <20240925010000.2231406-12-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240925010000.2231406-1-quic_wcheng@quicinc.com> References: <20240925010000.2231406-1-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: nalasex01c.na.qualcomm.com (10.47.97.35) 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: _dI47_NJLD4LSXMEyzRgsKR6LCjuzCS2 X-Proofpoint-ORIG-GUID: _dI47_NJLD4LSXMEyzRgsKR6LCjuzCS2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1015 bulkscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 suspectscore=0 impostorscore=0 spamscore=0 malwarescore=0 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409250005 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. Reviewed-by: Pierre-Louis Bossart Signed-off-by: Wesley Cheng --- sound/usb/card.c | 32 ++++++++++++++++++++++++++++++++ sound/usb/card.h | 3 +++ 2 files changed, 35 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index c6d9d8d548b4..1f9dfcd8f336 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -119,6 +119,38 @@ 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..4f4f3f39b7fa 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -207,4 +207,7 @@ 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 */