From nobody Wed Nov 27 12:40:20 2024 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 1C0521CFED5; Fri, 11 Oct 2024 00:07:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728605262; cv=none; b=CwEJXBGFJNL9cW7gi80OGG44kgpjqEngEzJuW8S18aDFkuJBPKSYWxyHL990+pVSv8Vr2o6z69Ak3LCe/IgRqy6FueVWAMbi59/ss+YgbbD+Jh4G308sfd5oeOr2b8etzWBcQ+pckY3sl+SutkEYwtFPNjm7Tuey6+F8Pp+R4Qg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728605262; c=relaxed/simple; bh=ZXPbpHEzwKIgrv8Ky4uyBr9mDKAN3LmnyDxkuOBUr+s=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=FEdRbeCcLCDhcXRKXcCEPP/RPgLGq7I4gpfp0KQ40YaJ4u+Rw/pawOJMc/xLdtZn50jbLy3eCXLS7Q1ODWsRiASctdS/r7X18C9qzLlKDUtXDmlhnmqVcU+jeBBz6qeHkPu45UlBhmUtIFoGPNSI0Qqqeh2cVsQuEzTg1rMYEhA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=TKlJAW0p; arc=none smtp.client-ip=205.220.180.131 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="TKlJAW0p" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49AGbQGQ024152; Fri, 11 Oct 2024 00:07:18 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= sppKnQ9mP7I1PHGy+WP4+a8FkaLJq9uw25XgiNX7C7I=; b=TKlJAW0paHHrMFmC iH28LJZ3rA/xZHfrTCd9V23/bd1DvNzAqrROKMe3V7T+Dh4k4eQPuGZdYRHGh8hY vmP2+X5jdOVtZb2Jvx2BNniOOq4Q1aEmCmenno6lR+zMmSg8sBMZleetE+tGcI/n g18Gn7e+upsv9lxizIUJVw+W1vf1Wis2rXiKO1YJjgRQLj9nZ30iMWCx2PvK3ivp Z8IgDa/YrMiHf4OF/ztaNaIP660dx6a0YGOb+4zMLutnOq1S8q1I5s9A/V7NLPkY K5GuWSIeVzbmL766w/8LXZg8l5UMv2o8a9cslhkOVDuXYvvfqjbyHyHCZny6xxJb HZCD9A== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 426adhjdp1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 11 Oct 2024 00:07:18 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA01.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 49B07Hfk020133 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 11 Oct 2024 00:07:17 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 15.2.1544.9; Thu, 10 Oct 2024 17:07:16 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , , Wesley Cheng Subject: [PATCH v28 25/32] ASoC: qcom: qdsp6: Fetch USB offload mapped card and PCM device Date: Thu, 10 Oct 2024 17:06:35 -0700 Message-ID: <20241011000650.2585600-51-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241011000650.2585600-1-quic_wcheng@quicinc.com> References: <20241011000650.2585600-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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-GUID: qB2Ab7SDMfFupZW7bGv9ymMt7dgCVV4l X-Proofpoint-ORIG-GUID: qB2Ab7SDMfFupZW7bGv9ymMt7dgCVV4l X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=999 clxscore=1015 mlxscore=0 impostorscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 suspectscore=0 priorityscore=1501 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410100159 Content-Type: text/plain; charset="utf-8" The USB SND path may need to know how the USB offload path is routed, so that applications can open the proper sound card and PCM device. The implementation for the QC ASoC design has a "USB Mixer" kcontrol for each possible FE (Q6ASM) DAI, which can be utilized to know which front end link is enabled. When an application/userspace queries for the mapped offload devices, the logic will lookup the USB mixer status though the following path: MultiMedia* <-> MM_DL* <-> USB Mixer* The "USB Mixer" is a DAPM widget, and the q6routing entity will set the DAPM connect status accordingly if the USB mixer is enabled. If enabled, the Q6USB backend link can fetch the PCM device number from the FE DAI link (Multimedia*). With respects to the card number, that is straightforward, as the ASoC components have direct references to the ASoC platform sound card. An example output can be shown below: Number of controls: 9 name value Capture Channel Map 0, 0 (range 0->36) Playback Channel Map 0, 0 (range 0->36) Headset Capture Switch On Headset Capture Volume 1 (range 0->4) Sidetone Playback Switch On Sidetone Playback Volume 4096 (range 0->8192) Headset Playback Switch On Headset Playback Volume 20, 20 (range 0->24) USB Offload Playback Route PCM#0 0, 1 (range -1->255) The "USB Offload Playback Route PCM#*" kcontrol will signify the corresponding card and pcm device it is offload to. (card#0 pcm - device#1) If the USB SND device supports multiple audio interfaces, then it will contain several PCM streams, hence in those situations, it is expected that there will be multiple playback route kcontrols created. Signed-off-by: Wesley Cheng --- sound/soc/qcom/qdsp6/q6usb.c | 104 +++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c index aacbe3bced99..b55e4c457128 100644 --- a/sound/soc/qcom/qdsp6/q6usb.c +++ b/sound/soc/qcom/qdsp6/q6usb.c @@ -132,6 +132,109 @@ static int q6usb_audio_ports_of_xlate_dai_name(struct= snd_soc_component *compone return ret; } =20 +static int q6usb_get_pcm_id_from_widget(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai *dai; + + for_each_card_rtds(w->dapm->card, rtd) { + dai =3D snd_soc_rtd_to_cpu(rtd, 0); + /* + * Only look for playback widget. RTD number carries the assigned + * PCM index. + */ + if (dai->stream[0].widget =3D=3D w) + return rtd->num; + } + + return -1; +} + +static int q6usb_usb_mixer_enabled(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_path *p; + + /* Checks to ensure USB path is enabled/connected */ + snd_soc_dapm_widget_for_each_sink_path(w, p) + if (!strcmp(p->sink->name, "USB Mixer") && p->connect) + return 1; + + return 0; +} + +static int q6usb_get_pcm_id(struct snd_soc_component *component) +{ + struct snd_soc_dapm_widget *w; + struct snd_soc_dapm_path *p; + int pidx; + + /* + * Traverse widgets to find corresponding FE widget. The DAI links are + * built like the following: + * MultiMedia* <-> MM_DL* <-> USB Mixer* + */ + for_each_card_widgets(component->card, w) { + if (!strncmp(w->name, "MultiMedia", 10)) { + /* + * Look up all paths associated with the FE widget to see if + * the USB BE is enabled. The sink widget is responsible to + * link with the USB mixers. + */ + snd_soc_dapm_widget_for_each_sink_path(w, p) { + if (q6usb_usb_mixer_enabled(p->sink)) { + pidx =3D q6usb_get_pcm_id_from_widget(w); + return pidx; + } + } + } + } + + return -1; +} + +static int q6usb_update_offload_route(struct snd_soc_component *component,= int card, + int pcm, int direction, long *route) +{ + struct q6usb_port_data *data =3D dev_get_drvdata(component->dev); + struct snd_soc_usb_device *sdev; + int ret =3D 0; + int cidx =3D -1; + int pidx =3D -1; + + mutex_lock(&data->mutex); + + if (list_empty(&data->devices) || + direction =3D=3D SNDRV_PCM_STREAM_CAPTURE) { + ret =3D -ENODEV; + goto out; + } + + sdev =3D list_last_entry(&data->devices, struct snd_soc_usb_device, list); + + /* + * Will always look for last PCM device discovered/probed as the + * active offload index. + */ + if (card =3D=3D sdev->card_idx && + pcm =3D=3D sdev->ppcm_idx[sdev->num_playback - 1]) { + cidx =3D component->card->snd_card->number; + pidx =3D q6usb_get_pcm_id(component); + } + + if (cidx < 0 || pidx < 0) { + cidx =3D -1; + pidx =3D -1; + } + +out: + route[0] =3D cidx; + route[1] =3D pidx; + + mutex_unlock(&data->mutex); + + return ret; +} + static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, struct snd_soc_usb_device *sdev, bool connected) { @@ -202,6 +305,7 @@ static int q6usb_component_probe(struct snd_soc_compone= nt *component) return -ENOMEM; =20 usb->connection_status_cb =3D q6usb_alsa_connection_cb; + usb->update_offload_route_info =3D q6usb_update_offload_route; =20 snd_soc_usb_add_port(usb); data->usb =3D usb;