From patchwork Thu Aug 1 01:17:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 816217 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 AC375153BD7; Thu, 1 Aug 2024 01:18:34 +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=1722475116; cv=none; b=fXY/vKnoYC7wVMob/Dv9rCSoK3UYkLA5jt6BFnZfrR3aLbv+GDtMUUzjhddD6u+pvXzm5mriPeKy/J2BJGYxzItGeTebW27sCitO0D4Cgh4GkzxqpY/sALbsdCchk25EcobD/IouVYB8sjrltV0+oo/2YOtsMBVOkwt0/k5IzO4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722475116; c=relaxed/simple; bh=nbpzghXoozOSKRfY4X/efc5Vvr75u27iINS2af+nHL0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=C/jvvpxWPtMSs3oBuzghZx7EtBeSXw3f78iDkXFNckRE0eLCckE8dCIjYjP6Lfm6cwZcppt+euQWBqxQIsM6ppmQjDy0mU+lz5iKLZ98YFzu7j8UNq7Ocor7z7Ki4LEWkZW3Z753my/WucIzZs+9ThDuQZqIcV+Jn5Vco1vSJWI= 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=HEeyU4JC; 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="HEeyU4JC" Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46VF2WmX021468; Thu, 1 Aug 2024 01:17:51 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=9a7035xQ2oD3K2KYVWK3JXn2 oRFgQXUvTYxERWW8hWM=; b=HEeyU4JCmldJXQlsD9YYIzitVI9NC4AzkZOdnj3P 6S7pufN4pa1nvHwuTZuLPXwl7jOs8KXUa2uy/IXpWBkemToSuFroGtJMhMdB/rCJ HZTLP3R/mmqd8h2EiAPpYweGzZfjjp5FNZWmNUEU/NUZVsssJ6/SokC3yX1JZGnX 7eemXCe6J9U8X7u5sqaqSHStm6fFacYE5QuoWq6U5iGbU3Cuu6FctQ5EzXFqJ5k7 rhEWnDxUmG4wHSDzntqer9hOHRzMkh2UNS2Cohl6uyaad67tYKuCKO0bsSZ4qngc +3gVtSK4SHSnOQvikhHoUmLXfUO2yuW/zH2//cVRuY4WEQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 40ms43d1t3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Aug 2024 01:17:50 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 4711HooP020179 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 1 Aug 2024 01:17:50 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, 31 Jul 2024 18:17:49 -0700 From: Wesley Cheng To: , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v24 30/34] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Date: Wed, 31 Jul 2024 18:17:26 -0700 Message-ID: <20240801011730.4797-31-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240801011730.4797-1-quic_wcheng@quicinc.com> References: <20240801011730.4797-1-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: 9S_P9pn8659PSrOAQXeQjyZHGgMI6Ucx X-Proofpoint-ORIG-GUID: 9S_P9pn8659PSrOAQXeQjyZHGgMI6Ucx 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=2024-07-31_11,2024-07-31_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 mlxlogscore=999 suspectscore=0 phishscore=0 priorityscore=1501 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408010004 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 8f1051e1716e..70b7f22ff495 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); +/* + * 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 = 0; i < SNDRV_CARDS; i++) { + if (usb_chip[i]) + platform_ops->connect_cb(usb_chip[i]); + } +} +EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices); + /* * disconnect streams * called from usb_audio_disconnect() diff --git a/sound/usb/card.h b/sound/usb/card.h index e98883785301..f0794aa06cd7 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -218,4 +218,6 @@ struct snd_usb_platform_ops { 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_offload.c index b862aa15aa37..3a89dedfd9ac 100644 --- a/sound/usb/qcom/qc_audio_offload.c +++ b/sound/usb/qcom/qc_audio_offload.c @@ -1898,6 +1898,8 @@ static int __init qc_usb_audio_offload_init(void) if (ret < 0) goto release_qmi; + snd_usb_rediscover_devices(); + return 0; release_qmi: