From patchwork Fri Dec 15 21:49:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13494980 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 605ED83B18; Fri, 15 Dec 2023 21:50:36 +0000 (UTC) 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="mzi9aYAG" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BFLhEe1027871; Fri, 15 Dec 2023 21:50:17 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=q0GglkH9BL8jSD9jhaM5 z3Dn/n42ehxtc0NGsMRWhxo=; b=mzi9aYAG5qD58hSnr1ZVLs3A/3jPOzHLlhZ0 C05qgNE8/VuQZu/HjbpI3knBD15KiPnoM453IMvd/UDNJ9equoKaez4q8aTTIAip nCsnhbLJvV1vYzfL8S/LNg0aalri0vKa9k+i9sf+s0sRWdE5JREhMHC+U9bZ+xqA OAtQIRobRNylyhZsdJBMhpjDWxVCEHcW0nHpH3vDpP93PPC7NmfIGQKMMWvL8l9X +dR5xF5kVn744sQ5KmEj/RMwLKlS3/rEbDptwYUWkY7i98/lz59J/3KfFetA1YCG sL2O4uQQcDquvvlwcZronAAZOvZfpLX7i9bACpXgAPtkvAPIoQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v0hqcj7bh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 Dec 2023 21:50:17 +0000 (GMT) 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 3BFLoHUj008375 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 Dec 2023 21:50:17 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 15.2.1118.40; Fri, 15 Dec 2023 13:50:16 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v10 36/41] ALSA: usb-audio: mixer: Add USB offloading mixer control Date: Fri, 15 Dec 2023 13:49:50 -0800 Message-ID: <20231215214955.12110-37-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231215214955.12110-1-quic_wcheng@quicinc.com> References: <20231215214955.12110-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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-ORIG-GUID: 5sllbosxZp1nfvEBdRKH7bgJ4xXZhrzJ X-Proofpoint-GUID: 5sllbosxZp1nfvEBdRKH7bgJ4xXZhrzJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxscore=0 phishscore=0 adultscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 suspectscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312150152 In order to allow userspace/applications know about USB offloading status, expose a sound kcontrol that fetches information about which sound card index is associated with the ASoC platform card supporting offloading. In the USB audio offloading framework, the ASoC BE DAI link is the entity responsible for registering to the SOC USB layer. SOC USB will expose more details about the current offloading status, which includes the USB sound card and USB PCM device indexes currently being used. Signed-off-by: Wesley Cheng --- sound/usb/Kconfig | 4 ++ sound/usb/Makefile | 1 + sound/usb/mixer.c | 5 +++ sound/usb/mixer_usb_offload.c | 82 +++++++++++++++++++++++++++++++++++ sound/usb/mixer_usb_offload.h | 14 ++++++ 5 files changed, 106 insertions(+) create mode 100644 sound/usb/mixer_usb_offload.c create mode 100644 sound/usb/mixer_usb_offload.h diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig index 4c842fbe6365..3e7be258d0e3 100644 --- a/sound/usb/Kconfig +++ b/sound/usb/Kconfig @@ -176,10 +176,14 @@ config SND_BCD2000 To compile this driver as a module, choose M here: the module will be called snd-bcd2000. +config SND_USB_OFFLOAD_MIXER + bool + config SND_USB_AUDIO_QMI tristate "Qualcomm Audio Offload driver" depends on QCOM_QMI_HELPERS && SND_USB_AUDIO && USB_XHCI_SIDEBAND select SND_PCM + select SND_USB_OFFLOAD_MIXER help Say Y here to enable the Qualcomm USB audio offloading feature. diff --git a/sound/usb/Makefile b/sound/usb/Makefile index 246788268ddd..8c54660a11b0 100644 --- a/sound/usb/Makefile +++ b/sound/usb/Makefile @@ -22,6 +22,7 @@ snd-usb-audio-objs := card.o \ stream.o \ validate.o +snd-usb-audio-$(CONFIG_SND_USB_OFFLOAD_MIXER) += mixer_usb_offload.o snd-usb-audio-$(CONFIG_SND_USB_AUDIO_MIDI_V2) += midi2.o snd-usb-audio-$(CONFIG_SND_USB_AUDIO_USE_MEDIA_CONTROLLER) += media.o diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 409fc1164694..09229e623469 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -48,6 +48,7 @@ #include "mixer.h" #include "helper.h" #include "mixer_quirks.h" +#include "mixer_usb_offload.h" #include "power.h" #define MAX_ID_ELEMS 256 @@ -3609,6 +3610,10 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif) if (err < 0) goto _error; + err = snd_usb_offload_init_mixer(mixer); + if (err < 0) + goto _error; + err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops); if (err < 0) goto _error; diff --git a/sound/usb/mixer_usb_offload.c b/sound/usb/mixer_usb_offload.c new file mode 100644 index 000000000000..a6e99982b97c --- /dev/null +++ b/sound/usb/mixer_usb_offload.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include + +#include +#include +#include + +#include "card.h" +#include "mixer.h" +#include "usbaudio.h" + +static int +snd_usb_offload_create_mixer(struct usb_mixer_interface *mixer, + const struct snd_kcontrol_new *new_kctl) +{ + struct snd_kcontrol *kctl; + struct usb_mixer_elem_info *elem; + + elem = kzalloc(sizeof(struct usb_mixer_elem_info), GFP_KERNEL); + if (!elem) + return -ENOMEM; + + elem->head.mixer = mixer; + elem->val_type = USB_MIXER_S32; + elem->control = 0; + elem->head.id = 0; + elem->channels = 1; + + kctl = snd_ctl_new1(new_kctl, elem); + if (!kctl) { + kfree(elem); + return -ENOMEM; + } + kctl->private_free = snd_usb_mixer_elem_free; + + return snd_usb_mixer_add_control(&elem->head, kctl); +} + +static int +snd_usb_offload_available_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol); + struct usb_mixer_interface *mixer = list->mixer; + struct snd_usb_audio *chip = mixer->chip; + struct usb_device *udev = chip->dev; + int ret; + + ret = snd_soc_usb_device_offload_available(udev->bus->sysdev); + ucontrol->value.integer.value[0] = ret < 0 ? -1 : ret; + + return ret < 0 ? ret : 0; +} + +static int snd_usb_offload_available_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = -1; + uinfo->value.integer.max = SNDRV_CARDS; + + return 0; +} + +static const struct snd_kcontrol_new snd_usb_offload_available_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .name = "SNDUSB OFFLD playback available", + .info = snd_usb_offload_available_info, + .get = snd_usb_offload_available_get, +}; + +int snd_usb_offload_init_mixer(struct usb_mixer_interface *mixer) +{ + return snd_usb_offload_create_mixer(mixer, &snd_usb_offload_available_ctl); +} +EXPORT_SYMBOL_GPL(snd_usb_offload_init_mixer); + diff --git a/sound/usb/mixer_usb_offload.h b/sound/usb/mixer_usb_offload.h new file mode 100644 index 000000000000..5289d54575a4 --- /dev/null +++ b/sound/usb/mixer_usb_offload.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __USB_OFFLOAD_MIXER_H +#define __USB_OFFLOAD_MIXER_H + +#if IS_ENABLED(CONFIG_SND_USB_OFFLOAD_MIXER) +int snd_usb_offload_init_mixer(struct usb_mixer_interface *mixer); +#else +static int snd_usb_offload_init_mixer(struct usb_mixer_interface *mixer) +{ + return 0; +} +#endif +#endif /* __USB_OFFLOAD_MIXER_H */