From patchwork Mon Apr 22 22:48:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13639069 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 31625154BF7; Mon, 22 Apr 2024 22:50:05 +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=1713826208; cv=none; b=SG6FPx0mIiE4QVej/Av4fGDnOPlnZEqcYrZbdDVkUnoLAtWW9lK49nBd1DQ9hWPjeE4SmK4jAL1z8Z+1Cvulhv4y9KpRWzkPh5+e7I9XMwXBMmGno55T4LCjkZlyDDdFzJcLajfV6BKkuhcZTylzWJw+53+cN66IOJ5Mp9Qghv4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713826208; c=relaxed/simple; bh=IQZWERZG+85eUZHZ4qNMhcg3Lt1vXI3rCcAPxn3UFc0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=aMJ3tQ10gr4/ti8XrsYozt7lBFTEZIgeHCnsmGAgJz5u2u63yLIPTT0VMLME4OU0mDGogz+zqR4oT8/CqCqtzpmSnSzqn1F4ZMPRk84O9Su4z7I+Y8KR7G/6WFvos/zaw1C/xhyeSqVK3MhHWsFWHyRw+ChItaVVZm8T+lHt44s= 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=g1NeCzY+; 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="g1NeCzY+" Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 43MLwYEf023308; Mon, 22 Apr 2024 22:49:49 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=uxQbOrCLKFSBlEbrW7J9 0CdIysG93sYR5VFMrTIX9B0=; b=g1NeCzY+WW4airexzzqOa2rsSoxOmt3L9298 U0Uyb2b/QjxSIg7mMQe6TOHaOSXhFdIIzefEFzbKPB53+IqrlN29Zx0xPvWWy0Zn fE4332f2zBw4fIH13815BIRws9ux1apC1hk5vASEez2UykhBubBZbT3jO9Y9nUeD JCT4MPmJ7k+yltuUGL4Fg5zxWkn1N41NtVj6Fsa7XXh9xAf3oujfKR1oXTARWODl WqqfXuz7LYiduwaVAbm3wAEvO+qz1EEZ5INa57QIpDQWetgFvK0ooVh0vCCeRUoN hcu0YZ/j8v16lrOhMOay/UzHSMI7xicDTfY8hcEKhvs7rQKrvg== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xnr0mha56-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 Apr 2024 22:49:49 +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 43MMnMR7022887 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 Apr 2024 22:49:22 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, 22 Apr 2024 15:49:22 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v19 21/41] ALSA: usb-audio: Check for support for requested audio format Date: Mon, 22 Apr 2024 15:48:46 -0700 Message-ID: <20240422224906.15868-22-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240422224906.15868-1-quic_wcheng@quicinc.com> References: <20240422224906.15868-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-sound@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: HQoC6wkU6s5X3dF5TVRp_7qkHyr_HLtJ X-Proofpoint-ORIG-GUID: HQoC6wkU6s5X3dF5TVRp_7qkHyr_HLtJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-04-22_16,2024-04-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 bulkscore=0 mlxscore=0 spamscore=0 priorityscore=1501 phishscore=0 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2404220096 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 7dc8007ba839..1ad99a462038 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 */