From nobody Thu Nov 14 16:30:49 2024 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 B0B4F20F5AA; Wed, 6 Nov 2024 19:34:53 +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=1730921696; cv=none; b=Z9DKdAzKi2AHYdSAiUAQQ46+UNAVrd+erENMnUgiDoiF5DpV7U6mYP2do5ByYZTSd+tKSKyCWKXOHTmCatgWsLjTH4ZV34DCqM4f92kCWuD5FFdwgBqcB1Nud9J2YLp9oOjGYWAFFDGahqNuPc6Px8H02Iu+ODixMKzc36xwbf8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730921696; c=relaxed/simple; bh=+LHUSkkeb/1iSaeZg7YknRD2wJpcT86aoNyUqfpTnlk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=unLH+C/mvpu0NE/uLeO4McJzgNnBCfAsv9HyOPAl5mSAHZVx7FRTeGa3yLbqtw9BZTQGL1Hq16CMEOwno9DxCNupfIhMcpGVdX69dS2G3yLM3kY98y6TXC+hsjndFjEyFrk+qcKUL8pk2gN1Qr1KqqqSZ1EzwBoReRzgMrBXuVY= 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=Rh9Tg9o0; 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="Rh9Tg9o0" Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4A6D8PWh023163; Wed, 6 Nov 2024 19:34:39 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= N7GLtFQSWKEhUD0WleL46UpD6884e9lfBPPVwEHE//I=; b=Rh9Tg9o0ckYINe8S 03rPsFQEP/rV/RunnY6CHOFHAVNxRreJoEg/iAup/PUa7dPk+yO6ErcECa361nRa jhcDfpOIrGc8KeuNdmNHLSNCVOGOum7/AtDK65gMEYz6FDjJhLMHrexeZxLPPkAg G/uy+LvLvmzRoY6Wu1l9FYEmHrwxv5w7K/iLP6p8H/vRUrNO9/0ujBZXXriih6T+ aneF7NeV8BpL1+KLfD6G3Tt9BFMiiSBkprswwd4Y/JXMv40h4wpgz26P+lM/xYee /phLjxbXX1Voty5IpdBaQRYjX821LolrS8+watCgruWxgRGgzkovaFkbc45jF+FR yjHJWA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 42r07hjg9b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 06 Nov 2024 19:34:38 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA04.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4A6JYbRX030330 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 6 Nov 2024 19:34:37 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; Wed, 6 Nov 2024 11:34:37 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v30 29/30] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Date: Wed, 6 Nov 2024 11:34:12 -0800 Message-ID: <20241106193413.1730413-30-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241106193413.1730413-1-quic_wcheng@quicinc.com> References: <20241106193413.1730413-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: HGM0YS0YAm1CWL2zR8mC4o93ZXMecRTG X-Proofpoint-ORIG-GUID: HGM0YS0YAm1CWL2zR8mC4o93ZXMecRTG 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 clxscore=1015 impostorscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 adultscore=0 mlxscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411060149 Content-Type: text/plain; charset="utf-8" In case of notifying SND platform drivers of connection events, some of these use cases, such as offloading, require an ASoC USB backend device to be initialized before the events can be handled. If the USB backend device has not yet been probed, this leads to missing initial USB audio device connection events. Expose an API that traverses the usb_chip array for connected devices, and to call the respective connection callback registered to the SND platform driver. Signed-off-by: Wesley Cheng --- sound/usb/card.c | 21 +++++++++++++++++++++ sound/usb/card.h | 2 ++ sound/usb/qcom/qc_audio_offload.c | 2 ++ 3 files changed, 25 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 4ac7f2b8309a..9fb8726a6c93 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -155,6 +155,27 @@ int snd_usb_unregister_platform_ops(void) } EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); =20 +/* + * in case the platform driver was not ready at the time of USB SND + * device connect, expose an API to discover all connected USB devices + * so it can populate any dependent resources/structures. + */ +void snd_usb_rediscover_devices(void) +{ + int i; + + guard(mutex)(®ister_mutex); + + if (!platform_ops || !platform_ops->connect_cb) + return; + + for (i =3D 0; i < SNDRV_CARDS; i++) { + if (usb_chip[i]) + platform_ops->connect_cb(usb_chip[i]); + } +} +EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices); + /* * Checks to see if requested audio profile, i.e sample rate, # of * channels, etc... is supported by the substream associated to the diff --git a/sound/usb/card.h b/sound/usb/card.h index d8b8522e1613..94404c24d240 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -222,4 +222,6 @@ snd_usb_find_suppported_substream(int card_idx, struct = snd_pcm_hw_params *params =20 int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); + +void snd_usb_rediscover_devices(void); #endif /* __USBAUDIO_CARD_H */ diff --git a/sound/usb/qcom/qc_audio_offload.c b/sound/usb/qcom/qc_audio_of= fload.c index f78cd8c504b9..4cf63faedf45 100644 --- a/sound/usb/qcom/qc_audio_offload.c +++ b/sound/usb/qcom/qc_audio_offload.c @@ -1935,6 +1935,8 @@ static int __init qc_usb_audio_offload_init(void) if (ret < 0) goto release_qmi; =20 + snd_usb_rediscover_devices(); + return 0; =20 release_qmi: