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Wed, 08 Mar 2023 23:58:08 +0000 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 328Nw77E016251 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 8 Mar 2023 23:58:07 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 15.2.986.41; Wed, 8 Mar 2023 15:58:07 -0800 From: Wesley Cheng To: , , , , , , , , , , , , Subject: [PATCH v3 09/28] sound: usb: card: Introduce USB SND platform op callbacks Date: Wed, 8 Mar 2023 15:57:32 -0800 Message-ID: <20230308235751.495-10-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230308235751.495-1-quic_wcheng@quicinc.com> References: <20230308235751.495-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] 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: QhlpnzS6zR--RLwvHnutrroaI93Myt97 X-Proofpoint-ORIG-GUID: QhlpnzS6zR--RLwvHnutrroaI93Myt97 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-08_15,2023-03-08_03,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 malwarescore=0 spamscore=0 phishscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 bulkscore=0 mlxlogscore=879 suspectscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2303080200 Message-ID-Hash: YOCOM5HU7HQVGRRXW6X2UKOJL2FRUBC2 X-Message-ID-Hash: YOCOM5HU7HQVGRRXW6X2UKOJL2FRUBC2 X-MailFrom: quic_wcheng@quicinc.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, quic_jackp@quicinc.com, quic_plai@quicinc.com, Wesley Cheng X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Allow for different platforms to be notified on USB SND connect/disconnect seqeunces. This allows for platform USB SND modules to properly initialize and populate internal structures with references to the USB SND chip device. Signed-off-by: Wesley Cheng --- sound/usb/card.c | 36 ++++++++++++++++++++++++++++++++++++ sound/usb/card.h | 20 ++++++++++++++++++++ 2 files changed, 56 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 26268ffb8274..9bcbaa0c0a55 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -117,6 +117,30 @@ MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no) static DEFINE_MUTEX(register_mutex); static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; static struct usb_driver usb_audio_driver; +static struct snd_usb_platform_ops *platform_ops; + +int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops) +{ + if (platform_ops) + return -EEXIST; + + mutex_lock(®ister_mutex); + platform_ops = ops; + mutex_unlock(®ister_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops); + +int snd_usb_unregister_platform_ops(void) +{ + mutex_lock(®ister_mutex); + platform_ops = NULL; + mutex_unlock(®ister_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); /* * disconnect streams @@ -909,7 +933,11 @@ static int usb_audio_probe(struct usb_interface *intf, chip->num_interfaces++; usb_set_intfdata(intf, chip); atomic_dec(&chip->active); + + if (platform_ops && platform_ops->connect_cb) + platform_ops->connect_cb(chip); mutex_unlock(®ister_mutex); + return 0; __error: @@ -946,6 +974,9 @@ static void usb_audio_disconnect(struct usb_interface *intf) card = chip->card; mutex_lock(®ister_mutex); + if (platform_ops && platform_ops->disconnect_cb) + platform_ops->disconnect_cb(chip); + if (atomic_inc_return(&chip->shutdown) == 1) { struct snd_usb_stream *as; struct snd_usb_endpoint *ep; @@ -1087,6 +1118,11 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) chip->system_suspend = chip->num_suspended_intf; } + mutex_lock(®ister_mutex); + if (platform_ops && platform_ops->suspend_cb) + platform_ops->suspend_cb(intf, message); + mutex_unlock(®ister_mutex); + return 0; } diff --git a/sound/usb/card.h b/sound/usb/card.h index 6ec95b2edf86..94c3ae7bb4a5 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -207,4 +207,24 @@ struct snd_usb_stream { struct list_head list; }; +struct snd_usb_platform_ops { + void (*connect_cb)(struct snd_usb_audio *chip); + void (*disconnect_cb)(struct snd_usb_audio *chip); + void (*suspend_cb)(struct usb_interface *intf, pm_message_t message); +}; + +#if IS_ENABLED(CONFIG_SND_USB_AUDIO) +int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); +int snd_usb_unregister_platform_ops(void); +#else +int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops) +{ + return -EOPNOTSUPP; +} + +int snd_usb_unregister_platform_ops(void) +{ + return -EOPNOTSUPP; +} +#endif /* IS_ENABLED(CONFIG_SND_USB_AUDIO) */ #endif /* __USBAUDIO_CARD_H */