From nobody Thu Sep 19 16:16:17 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 048601BDAB8; Thu, 29 Aug 2024 19:41:50 +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=1724960513; cv=none; b=Pa8n7xkxdiU+VkciI6JkrVGcZVOaXGx4ivK3+Knw9B9fPp+Yyh36JWmRveci/r/mCOFjBIqVip5mmGwxiLah69p3RT6M14qVCUUH/FaE7oHAPyRQ1ON+Ff5ZxmGh7gsuhmk9Fmud+zxhCc3Fs9DTn3ldx+FivnsXxqiWQTaZwQI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724960513; c=relaxed/simple; bh=Gx78dVZPi6zqeiFdZlVe5kyrEbBXxgAVc+WTPad6N64=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=In6q0P88U4Hr3z6596enziKvHjcaa0xn07cpjQqjnAbPzFz0iju302SdvhqYmYE9vAtGcBAgxKa0N4CFqS/h5ZDZ5P2ms+ZX23p+0esrZOvkXA2D1fUY9gWGwdzZwBfG5IEX3ieJK7AGHlaLMtedUjGQBeU2mxzS6TmlDrEO1U8= 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=eIc/WXqA; 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="eIc/WXqA" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47TH7D46023319; Thu, 29 Aug 2024 19:41:35 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= VAp/YzHcakSvk64Sq0sPNXYs9XlsMZu1xWybjwi7XY4=; b=eIc/WXqA23ka90Fb 8eo3Rmxt65xuWIkHn/jvEOz63vt3hKCOT5SwbK8F3rebkPABH6//bQWDU4g5+Umz S4qUeGZMcAm0gJumApDpqW1VV+fcuL542PO4x930JW4ZushmrHK4RawLkljZ17cm GTzVNkXXW4Mg/YxyeCL9q3bI2VZxlzsN/Oa4gKhXPCatVLZHdIvKuTlymy8bb36w VmJ8O7jLNq6XpKV1MIGz5N8hzFa5/M7qo44ffvEX0nycpitIEMbXHBYlGhz9vgx5 ROfLOxLPRr3R/iGpwH9Ehv0LDsV3YnKYhC+ik47cAnzK8Cbs/rAWQ/08I7F4ioG4 2/q9Rw== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 41a612mddm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Aug 2024 19:41:35 +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 47TJfXLc019344 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Aug 2024 19:41:33 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; Thu, 29 Aug 2024 12:41:33 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , CC: , , , , , , , , Wesley Cheng Subject: [PATCH v26 32/33] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Date: Thu, 29 Aug 2024 12:41:04 -0700 Message-ID: <20240829194105.1504814-33-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240829194105.1504814-1-quic_wcheng@quicinc.com> References: <20240829194105.1504814-1-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: nalasex01c.na.qualcomm.com (10.47.97.35) 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: 6E4MPE58EDVhReuEx7iQBcJqo_WU8u2f X-Proofpoint-ORIG-GUID: 6E4MPE58EDVhReuEx7iQBcJqo_WU8u2f 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=2024-08-29_06,2024-08-29_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 phishscore=0 spamscore=0 mlxlogscore=999 adultscore=0 impostorscore=0 mlxscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408290139 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 7f120aa006c0..b1255e7c02de 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 5b9262a116be..2dc651cd3d05 100644 --- a/sound/usb/qcom/qc_audio_offload.c +++ b/sound/usb/qcom/qc_audio_offload.c @@ -1929,6 +1929,8 @@ 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: