From patchwork Tue Jan 2 21:45:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 759588 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 D6C901775A; Tue, 2 Jan 2024 21:46:43 +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="Ph2qna9x" Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 402Le26F023563; Tue, 2 Jan 2024 21:46:27 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=7VZfx/Bay9jjE9Iv4MJz JiR4uxKr/xQofmWH8gbXo0Y=; b=Ph2qna9xBoJl6YL77Th0Lp61grYLQge7duQM nIIQ3z8VoXARGKI0SPxuBPhe3KFZwjBYxa6UZi7ppY+rzCp75wnP6pq14M8S1+8I KEpXfV/cdPWKxXX1HSoeCD2UHoKW2l/DCWdhzf0wATgEqoRkKGYiKzQL9PyvGpTU BXU57BmQiN6qHbxmAd9A4pMVX4MbMELFwVFTKJXviiKSgH3N+aR9DIL55paNVubq eS56cHZr95r0ZdO5SDQ+nOPmEq8LKrjpmVcwXxyNNOLIePMGdD9dMhwdgVPCfeQY vvmpmlkYStO3NXzePezmRXpNd5yfx3FruvI64xd/syZcBP6HLQ== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3vcg419bb2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jan 2024 21:46:27 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 402LkQbU011486 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 2 Jan 2024 21:46:26 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; Tue, 2 Jan 2024 13:46:26 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v12 29/41] ASoC: Introduce SND kcontrols to select sound card and PCM device Date: Tue, 2 Jan 2024 13:45:37 -0800 Message-ID: <20240102214549.22498-30-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240102214549.22498-1-quic_wcheng@quicinc.com> References: <20240102214549.22498-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-usb@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-GUID: nt0UPwSkqlW0t-yOlFqvntCZEUnYWc20 X-Proofpoint-ORIG-GUID: nt0UPwSkqlW0t-yOlFqvntCZEUnYWc20 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 clxscore=1015 mlxscore=0 phishscore=0 spamscore=0 bulkscore=0 adultscore=0 priorityscore=1501 impostorscore=0 mlxlogscore=999 malwarescore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401020161 Add SND kcontrol to SOC USB, which will allow for userpsace to determine which USB card number and PCM device to offload. This allows for userspace to potentially tag an alternate path for a specific USB SND card and PCM device. Previously, control was absent, and the offload path would be enabled on the last USB SND device which was connected. This logic will continue to be applicable if no mixer input is received for specific device selection. An example to configure the offload device using tinymix: tinymix -D 0 set 'SNDUSB OFFLD device select' 1 0 The above command will configure the offload path to utilize card#1 and PCM stream#0. Signed-off-by: Wesley Cheng --- include/sound/soc-usb.h | 7 ++++- sound/soc/soc-usb.c | 65 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 71 insertions(+), 1 deletion(-) diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h index d9fc83180c56..20d7b32bba07 100644 --- a/include/sound/soc-usb.h +++ b/include/sound/soc-usb.h @@ -26,14 +26,19 @@ struct snd_soc_usb_device { * @dev - USB backend device reference * @component - reference to ASoC component * @connection_status_cb - callback to notify connection events + * @put_offload_dev - callback to select USB sound card/PCM device + * @get_offload_dev - callback to fetch selected USB sound card/PCM device * @priv_data - driver data **/ struct snd_soc_usb { struct list_head list; - struct device *dev; struct snd_soc_component *component; int (*connection_status_cb)(struct snd_soc_usb *usb, struct snd_soc_usb_device *sdev, bool connected); + int (*put_offload_dev)(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol); + int (*get_offload_dev)(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol); void *priv_data; }; diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c index cad8e1d798e4..c568c67e3e4a 100644 --- a/sound/soc/soc-usb.c +++ b/sound/soc/soc-usb.c @@ -15,6 +15,9 @@ static struct device_node *snd_soc_find_phandle(struct device *dev) { struct device_node *node; + if (!dev) + return ERR_PTR(-ENODEV); + node = of_parse_phandle(dev->of_node, "usb-soc-be", 0); if (!node) return ERR_PTR(-ENODEV); @@ -38,6 +41,64 @@ static struct snd_soc_usb *snd_soc_find_usb_ctx(struct device_node *node) return NULL; } +/* SOC USB sound kcontrols */ +static int soc_usb_put_offload_dev(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); + struct snd_soc_usb *ctx = snd_soc_usb_find_priv_data(component->dev); + int ret = 0; + + mutex_lock(&ctx_mutex); + if (ctx && ctx->put_offload_dev) + ret = ctx->put_offload_dev(kcontrol, ucontrol); + mutex_unlock(&ctx_mutex); + + return ret; +} + +static int soc_usb_get_offload_dev(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); + struct snd_soc_usb *ctx = snd_soc_usb_find_priv_data(component->dev); + int ret = 0; + + mutex_lock(&ctx_mutex); + if (ctx && ctx->get_offload_dev) + ret = ctx->get_offload_dev(kcontrol, ucontrol); + mutex_unlock(&ctx_mutex); + + return ret; + +} + +static int soc_usb_offload_dev_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + uinfo->value.integer.min = -1; + uinfo->value.integer.max = SNDRV_CARDS; + + return 0; +} + +static const struct snd_kcontrol_new soc_usb_dev_ctrl = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .name = "SNDUSB OFFLD device select", + .info = soc_usb_offload_dev_info, + .get = soc_usb_get_offload_dev, + .put = soc_usb_put_offload_dev, +}; + +static int snd_soc_usb_control_init(struct snd_soc_component *component) +{ + return snd_ctl_add(component->card->snd_card, + snd_ctl_new1(&soc_usb_dev_ctrl, component)); +} + /** * snd_soc_usb_get_components_tag() - Retrieve SOC USB component tag * @playback: direction of audio stream @@ -157,7 +218,11 @@ EXPORT_SYMBOL_GPL(snd_soc_usb_free_port); */ int snd_soc_usb_add_port(struct snd_soc_usb *usb) { + int ret; + ret = snd_soc_usb_control_init(usb->component); + if (ret < 0) + return ret; mutex_lock(&ctx_mutex); list_add_tail(&usb->list, &usb_ctx_list);