From patchwork Tue Aug 29 21:06:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 718561 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A32CCA0C13 for ; Tue, 29 Aug 2023 21:08:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240675AbjH2VIV (ORCPT ); Tue, 29 Aug 2023 17:08:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233129AbjH2VHm (ORCPT ); Tue, 29 Aug 2023 17:07:42 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B60A01A2; Tue, 29 Aug 2023 14:07:39 -0700 (PDT) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37TKTb9U012240; Tue, 29 Aug 2023 21:07:18 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=MUHE0pwz8elxP1d1ocdw5bD+H2ChU6AxcRGnDZb5p0g=; b=PHqx/BLdOUTJAhyMAe/jp8nntyG/ksrfQkaevd1ulHy9u/46evuJAncIUonycXGc9pXE lPdxipEebRSV1acwM9Nt2kzLZ+ndK3t3GfibpkqgKfcPYuqs7I2cSzhKkXBiriKnCh0O 48rSAX7OJ+axykL71zORwD51Ytez/Vx453AmlNX8fjziHtTB7wdJIosCVCPgvl/SU3iq yt2twjubL4HohXBGGQXcx/I0jMyg+2JblaVHgnFbUqet5QBFrZ42cOh7enLTGwoF5hTl ozUDG8LPaAOsTgyogAY61HN34+JhSvUtUkR7ctVJR6j7ICSUm+OYqAYkBlfxksEn45ga Ow== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3srybqbe6g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 21:07:17 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 37TL7Hdh016241 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 21:07:17 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 15.2.1118.36; Tue, 29 Aug 2023 14:07:16 -0700 From: Wesley Cheng To: , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v5 31/32] sound: usb: card: Allow for rediscovery of connected USB SND devices Date: Tue, 29 Aug 2023 14:06:56 -0700 Message-ID: <20230829210657.9904-32-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230829210657.9904-1-quic_wcheng@quicinc.com> References: <20230829210657.9904-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] 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-ORIG-GUID: Lwuvpq6w_IzhISogYx3hxbh1JzX_wjI_ X-Proofpoint-GUID: Lwuvpq6w_IzhISogYx3hxbh1JzX_wjI_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-29_15,2023-08-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 clxscore=1015 mlxlogscore=999 lowpriorityscore=0 priorityscore=1501 mlxscore=0 impostorscore=0 adultscore=0 suspectscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2308290182 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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 | 19 +++++++++++++++++++ sound/usb/card.h | 2 ++ 2 files changed, 21 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index bbcb22166d85..007cf5ef7671 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -187,6 +187,25 @@ 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; + + mutex_lock(®ister_mutex); + for (i = 0; i < SNDRV_CARDS; i++) { + if (usb_chip[i]) + if (platform_ops && platform_ops->connect_cb) + platform_ops->connect_cb(usb_chip[i]); + } + mutex_unlock(®ister_mutex); +} +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 01f7e10f30f4..c0aeda17ed69 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -221,11 +221,13 @@ int snd_usb_unregister_platform_ops(void); #if IS_ENABLED(CONFIG_SND_USB_AUDIO) 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); #else static struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params, int direction) { return NULL; } +static void snd_usb_rediscover_devices(void) { } #endif /* IS_ENABLED(CONFIG_SND_USB_AUDIO) */ #endif /* __USBAUDIO_CARD_H */