From patchwork Tue May 7 19:51:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 795789 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 413BC17EB8F; Tue, 7 May 2024 19:52:12 +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=1715111533; cv=none; b=CsYbLV6jKtCBowMX/smGdzfAwAyJeMpLVeoYLWZZIKKzdpdqF/tUfi8xUDRCXl7FGXYol/bsoD5E9asL2qO+z3Ji1YZzd0X+qkdZmVcvMaoHuMaiRJ2TUgnHgU5yEs126BfE3hfORpTFWMq435jikTWwPcipZHxvX3opMvoTqaM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715111533; c=relaxed/simple; bh=GUbBSkWXoy3nKyyir5jzrYrO2j+5K9NzzKOAY9SHkFY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=pCBqP0sMMtJplfTpx3ymMDaFwJnu+4E43LkwIVnKR3dLGinzhwXG3m+0C98z77QHCH+EvWfkZH2ub1b7fvKReUpDq+hcWY5MPVZwnpG+bVCOdq8Kny/jLzzkys9SrVMs+cPMdIDYWfInSOhdMbYRFGk6vFW9o4H7QeXIwILgUCE= 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=g6b6YPIG; 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="g6b6YPIG" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 447Jk0t5011728; Tue, 7 May 2024 19:51:38 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=7RMyAqhUADHy1wmgVTZy 7AMWbknjET/QBX2EfhPYid8=; b=g6b6YPIGltUQfWFPguMzJcGk1QMECzWiY7q9 7GvPO9HWuhQa00jxww0mFJ+U1Xs9As8t8tFvybwn54R16xwcRpSye7/uVVPBMf5y 6grVze7p+AZxiekBO2eXejbILQy1lNckD6e6xcXjhYfgG41je+SoddpRdxheupBH Whg3hYFK0ZawRPgmAoH5kEQ4xP5ybsS8q1N7ecZzdKeU3DtA+qWlEdJJEW8G+R8P FZGhOvj+790tUrtQqK1MfIibSfgQ3/JZQje3haht51qm731IDtlErITQGq9sD7ZP KtEUWJqOkhKIULh6LU7RhJ+qjcOXoRGUmakjn6JUUXyx4D/fMA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xysgc85rf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 07 May 2024 19:51:38 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 447JpbaN019845 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 7 May 2024 19:51:37 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; Tue, 7 May 2024 12:51:36 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v21 35/39] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Date: Tue, 7 May 2024 12:51:12 -0700 Message-ID: <20240507195116.9464-36-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240507195116.9464-1-quic_wcheng@quicinc.com> References: <20240507195116.9464-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) 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: eXV9H4OtyZVAvnA2Q95k2FGRLqcFQAk6 X-Proofpoint-ORIG-GUID: eXV9H4OtyZVAvnA2Q95k2FGRLqcFQAk6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-05-07_12,2024-05-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 impostorscore=0 adultscore=0 bulkscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405010000 definitions=main-2405070138 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 | 1 + sound/usb/qcom/qc_audio_offload.c | 2 ++ 3 files changed, 24 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 1ad99a462038..8364c5b8fbbf 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -186,6 +186,27 @@ struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, } EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream); +/* + * 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 3c900e5afbce..140928dd9d63 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -221,4 +221,5 @@ 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); +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 aeea224bba70..2659d8776bed 100644 --- a/sound/usb/qcom/qc_audio_offload.c +++ b/sound/usb/qcom/qc_audio_offload.c @@ -1879,6 +1879,8 @@ static int __init qc_usb_audio_offload_init(void) if (ret < 0) goto release_qmi; + snd_usb_rediscover_devices(); + return 0; release_qmi: