From patchwork Sat Feb 3 02:36:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 769824 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 9005832C89; Sat, 3 Feb 2024 02:37:58 +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=1706927881; cv=none; b=B7BXHyzTapqh4EZw/34bsdz03I9Qc5pV6kKNdlqCPaWmelJvJK1NbcPfD7d3QfqwyGf/fQNxchid1cUSiiqXgUVMf7DcV49UU4ezXx7TzO+77psE5zMJQJUwhfT9CIHRLd0PJHARwUGnyOvEz+G1nJpuBnFTVKjiukkhVSIQFPk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706927881; c=relaxed/simple; bh=pekBx9Zz/pOLaGxUwdYxxqcLu65gS4YFA/x5Z2U98yU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=XL7RjqfHl+6ugoVWBdvjjjvEzTgMXvmI1J4H2aZa+dPWAwmPpuF+uedJz95TRaoWlc8xF3Mx4Yh+AprHQxmb1puzoRjmK4zG4Kva8jGm8jmsPQRrUqvVHCUINxnBbeRdzME+Jp3+S4ID+NkaBRIIGBU5b1OKj6BWTG6kE7zyByc= 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=f6eoXVcF; 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="f6eoXVcF" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 4132CgTF023147; Sat, 3 Feb 2024 02:37:41 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=E7ozCBUEd5eMhyDHRgWt lAvFMDO6aFPFBgk1S/Zoj9c=; b=f6eoXVcFnWPm/qm6kxCj+kBJJoVDPsz5LAGS +5LaDI7VcB4V0CM0iAdZ2vn7yni7ZrgXhBG2CRJecne6O64IwcaFAX1L3KATIBmi +Cm54ry4zlKOElqldyejdlkWpk94FZ2o0wiXsSJHPVneF9uC+VmyOCzo7uLF7Pdb VqS4l/zzTPR0obOS9mc7WGddEGJsqchTd9gxhkEv/gtByolcvkToDJi/IGSBWM4i bt9nizN24WsVC/+OausAEDhkdYWLNA/b0rpwL5WBdIBHs3A257eLM+8Uglq9v43t I5XzRA2g6h5+NWcpvwhSZ9iIbVQt65bQKinPbYiXJ6PYxwbtSg== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3w1cgcg0rb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 03 Feb 2024 02:37:41 +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 4132bRrG024783 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 3 Feb 2024 02:37:27 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 15.2.1118.40; Fri, 2 Feb 2024 18:37:26 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v13 32/53] ALSA: usb-audio: Check for support for requested audio format Date: Fri, 2 Feb 2024 18:36:24 -0800 Message-ID: <20240203023645.31105-33-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240203023645.31105-1-quic_wcheng@quicinc.com> References: <20240203023645.31105-1-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: 5y5MFhsC9QNCqKRa2c4_NvkOp3nW3noM X-Proofpoint-ORIG-GUID: 5y5MFhsC9QNCqKRa2c4_NvkOp3nW3noM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-02_16,2024-01-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 spamscore=0 suspectscore=0 mlxscore=0 malwarescore=0 clxscore=1015 phishscore=0 priorityscore=1501 bulkscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402030015 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 | 40 ++++++++++++++++++++++++++++++++++++++++ sound/usb/card.h | 11 +++++++++++ 2 files changed, 51 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index c0b312e264bf..11b827b7a2a5 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -162,6 +162,46 @@ 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; + const struct audioformat *fmt; + + /* + * Register mutex is held when populating and clearing usb_chip + * array. + */ + mutex_lock(®ister_mutex); + chip = usb_chip[card_idx]; + if (!chip) { + mutex_unlock(®ister_mutex); + return NULL; + } + + if (enable[card_idx]) { + list_for_each_entry(as, &chip->pcm_list, list) { + subs = &as->substream[direction]; + fmt = snd_usb_find_substream_format(subs, params); + if (fmt) { + mutex_unlock(®ister_mutex); + return as; + } + } + } + mutex_unlock(®ister_mutex); + + 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..ed4a664e24e5 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -217,4 +217,15 @@ struct snd_usb_platform_ops { int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); + +#if IS_ENABLED(CONFIG_SND_USB_AUDIO) +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction); +#else +static struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction) +{ + return NULL; +} +#endif /* IS_ENABLED(CONFIG_SND_USB_AUDIO) */ #endif /* __USBAUDIO_CARD_H */