From patchwork Fri Dec 13 23:53:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13908173 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 4052F1F7079; Fri, 13 Dec 2024 23:54:40 +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=1734134083; cv=none; b=YVQohqohCVt5fXMkJqdEltx/1EUrDqQ70T/iSm9ybpCrqbTEF7wNa1W/qO5jgI4xSTyLhUnY7GEe4VCHiH3BOLn3HXMRVQo5MSTXdzYvVmQvLWv2AKvEcnd1VGfBMmNnv19Hy9gtxafepBDa8qkRfuhJatPBQTrVn1BQDvHN0Mo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734134083; c=relaxed/simple; bh=j/c6lBUb/+5zMcmoE9IPvHYGY8MPsPKhxhlYshndOKA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uHGXoUVMun5qIcIFxf41XySFZzBmU8q7rxwa4j21eNKsUa0iaje30h/1f9wP6rGvW3cdE/bRzeReLyXC/Yd2XaBAlxWDUy5AU19kxfnzvvb7nh5zOvQ7L3ssQtMpXVy+AnAyEoOziPgT1hwUmAbDeRxAURhEqnnjF6LJUBP7TGw= 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=Z5hixBNI; 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="Z5hixBNI" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4BDEWluZ018037; Fri, 13 Dec 2024 23:54:19 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= 9t+5MC6CtzjYmpWFQEWwq0uUNuZ/YS/w2dz1hCFRDhs=; b=Z5hixBNICU0whIug 0mg9K/mEKcWfMR0vqGV9a5fCo/x6lfG7sxr/KGtmPrw+GSm6Lw+U8NAAl3PHQRFg dq0VrSWrUMf0gWqa0Iy++j8/qKRz9gHsgHYoA+IPMTncPaxuUi8AaKIxtxViWO4W qXs/9+FKl2eoba6TlTPpiX80IWeUeadfDd2BQaXoxz4VHjw1xCZwmalT3YdF4UDL 5I0a9hBqJF5Klt9+xB79VmQehdoj9UIUiojcvvk0fJuBY7NzVoakyKr0qJg69rEZ doHUrOrc+n3Wg0kh2KY4cHk/AXCCkZC7RyoKS2Sby7YAbJWqe19Ft9A81R6DGiw8 DWs4Hw== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43gdkn2r7s-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Dec 2024 23:54:19 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA02.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4BDNsI3r007227 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Dec 2024 23:54:18 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; Fri, 13 Dec 2024 15:54:17 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v31 14/32] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Date: Fri, 13 Dec 2024 15:53:45 -0800 Message-ID: <20241213235403.4109199-15-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241213235403.4109199-1-quic_wcheng@quicinc.com> References: <20241213235403.4109199-1-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: XLDoJB7V1aLNI0uOXwiT56-c7dEzJfds X-Proofpoint-ORIG-GUID: XLDoJB7V1aLNI0uOXwiT56-c7dEzJfds 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 spamscore=0 mlxlogscore=999 impostorscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 phishscore=0 bulkscore=0 suspectscore=0 mlxscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412130170 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 ++ 2 files changed, 23 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); +/* + * 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); + /* * 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 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 */