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Fri, 23 Dec 2022 23:32:44 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 15.2.986.36; Fri, 23 Dec 2022 15:32:44 -0800 From: Wesley Cheng To: , , , , , , , , , , , , Subject: [RFC PATCH 04/14] sound: usb: card: Introduce USB SND vendor op callbacks Date: Fri, 23 Dec 2022 15:31:50 -0800 Message-ID: <20221223233200.26089-5-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221223233200.26089-1-quic_wcheng@quicinc.com> References: <20221223233200.26089-1-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-ORIG-GUID: kfEueJdQT5jZwiwFMYsDioxhTJ9T-uCV X-Proofpoint-GUID: kfEueJdQT5jZwiwFMYsDioxhTJ9T-uCV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-23_08,2022-12-23_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 bulkscore=0 adultscore=0 impostorscore=0 mlxlogscore=906 lowpriorityscore=0 suspectscore=0 mlxscore=0 phishscore=0 clxscore=1015 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212230197 X-Mailman-Approved-At: Sun, 25 Dec 2022 19:49:45 +0100 X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Wesley Cheng , quic_jackp@quicinc.com, quic_plai@quicinc.com Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Allow for different vendors to be notified on USB SND connect/disconnect seqeunces. This allows for vendor 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 | 22 ++++++++++++++++++++++ sound/usb/card.h | 7 +++++++ 2 files changed, 29 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index 26268ffb8274..212f55a7683c 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -117,6 +117,21 @@ 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_vendor_ops *vendor_ops; + +int snd_usb_register_vendor_ops(struct snd_usb_vendor_ops *ops) +{ + vendor_ops = ops; + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_register_vendor_ops); + +int snd_usb_unregister_vendor_ops(void) +{ + vendor_ops = NULL; + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_unregister_vendor_ops); /* * disconnect streams @@ -910,6 +925,10 @@ static int usb_audio_probe(struct usb_interface *intf, usb_set_intfdata(intf, chip); atomic_dec(&chip->active); mutex_unlock(®ister_mutex); + + if (vendor_ops->connect_cb) + vendor_ops->connect_cb(intf, chip); + return 0; __error: @@ -943,6 +962,9 @@ static void usb_audio_disconnect(struct usb_interface *intf) if (chip == USB_AUDIO_IFACE_UNUSED) return; + if (vendor_ops->disconnect_cb) + vendor_ops->disconnect_cb(intf); + card = chip->card; mutex_lock(®ister_mutex); diff --git a/sound/usb/card.h b/sound/usb/card.h index 40061550105a..a785bb256b0d 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -206,4 +206,11 @@ struct snd_usb_stream { struct list_head list; }; +struct snd_usb_vendor_ops { + void (*connect_cb)(struct usb_interface *intf, struct snd_usb_audio *chip); + void (*disconnect_cb)(struct usb_interface *intf); +}; + +int snd_usb_register_vendor_ops(struct snd_usb_vendor_ops *ops); +int snd_usb_unregister_vendor_ops(void); #endif /* __USBAUDIO_CARD_H */