From patchwork Thu Sep 21 21:48:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 725312 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51337E7D0B0 for ; Thu, 21 Sep 2023 22:02:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231180AbjIUWCi (ORCPT ); Thu, 21 Sep 2023 18:02:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232892AbjIUWCW (ORCPT ); Thu, 21 Sep 2023 18:02:22 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54113421C; Thu, 21 Sep 2023 14:49:42 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 38LLiGB2019880; Thu, 21 Sep 2023 21:49:19 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=LBxkFDyqOnh2+G6P+KTcb0gzdJn618PndBANwN/CVtk=; b=I+jNnHit2LxmqN8VEUft9gqZVi7hbmZFzNcpZ0DQv4WktqNlVS9e4MPzIBCtbfCIMIfI M5VsiST9xXf+YQwNdupPP2usJayAqpbBqq2anWLEGFP5ZYWCDGxu00AUgIwolfHPt/SH B/lpReZiXW7JpthiCYYz+KTcHzn0L0cIld+h0iSY7W2SoOGBuXuNXclT6lGjE7IofwL2 sq46/a8DK8+tk3FrVuKMXQhTv14VaMJnkdLBWT64AIU43mXqQsTHIlejkaoGE6SS+ZZt i+lfZLdC5/O+0hibdabsVn+eMxQHmoViwtRR7rp6jk9VsCOqK7rxIcVwQ532pck0Iv7F Dw== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3t8u5n0bq8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Sep 2023 21:49:18 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 38LLn2R6009064 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Sep 2023 21:49:02 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 15.2.1118.36; Thu, 21 Sep 2023 14:49:01 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , Wesley Cheng Subject: [PATCH v7 29/33] ASoC: qcom: qdsp6: Add SND kcontrol for fetching offload status Date: Thu, 21 Sep 2023 14:48:39 -0700 Message-ID: <20230921214843.18450-30-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230921214843.18450-1-quic_wcheng@quicinc.com> References: <20230921214843.18450-1-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: vJ-NoKu2mpKjLq4o2KPodOmXsZNFOqTT X-Proofpoint-GUID: vJ-NoKu2mpKjLq4o2KPodOmXsZNFOqTT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-09-21_19,2023-09-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 priorityscore=1501 malwarescore=0 spamscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 clxscore=1015 adultscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2309210189 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add a kcontrol to the platform sound card to fetch the current offload status. This can allow for userspace to ensure/check which USB SND resources are actually busy versus having to attempt opening the USB SND devices, which will result in an error if offloading is active. Signed-off-by: Wesley Cheng --- sound/soc/qcom/qdsp6/q6usb.c | 104 ++++++++++++++++++++++++++++++++++- 1 file changed, 101 insertions(+), 3 deletions(-) diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c index a95276b7d91d..d2f60ce66cf3 100644 --- a/sound/soc/qcom/qdsp6/q6usb.c +++ b/sound/soc/qcom/qdsp6/q6usb.c @@ -30,6 +30,8 @@ struct q6usb_status { unsigned int num_pcm; unsigned int chip_index; unsigned int pcm_index; + bool prepared; + bool running; }; struct q6usb_port_data { @@ -52,6 +54,17 @@ static const struct snd_soc_dapm_route q6usb_dapm_routes[] = { {"USB Playback", NULL, "USB_RX_BE"}, }; +static int q6usb_find_running(struct q6usb_port_data *data) +{ + int i; + + for (i = 0; i < SNDRV_CARDS; i++) { + if (data->status[i].running) + return i; + } + return -ENODEV; +} + static int q6usb_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) @@ -81,14 +94,40 @@ static int q6usb_hw_params(struct snd_pcm_substream *substream, goto out; data->status[data->sel_card_idx].pcm_index = data->sel_pcm_idx; + data->status[data->sel_card_idx].prepared = true; out: mutex_unlock(&data->mutex); return ret; } +static int q6usb_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct q6usb_port_data *data = dev_get_drvdata(dai->dev); + + mutex_lock(&data->mutex); + data->status[data->sel_card_idx].running = true; + mutex_unlock(&data->mutex); + + return 0; +} + +static void q6usb_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct q6usb_port_data *data = dev_get_drvdata(dai->dev); + + mutex_lock(&data->mutex); + data->status[data->sel_card_idx].running = false; + data->status[data->sel_card_idx].prepared = false; + mutex_unlock(&data->mutex); +} + static const struct snd_soc_dai_ops q6usb_ops = { .hw_params = q6usb_hw_params, + .prepare = q6usb_prepare, + .shutdown = q6usb_shutdown, }; static struct snd_soc_dai_driver q6usb_be_dais[] = { @@ -148,10 +187,15 @@ static int q6usb_put_offload_dev(struct snd_kcontrol *kcontrol, int pcmidx; int cardidx; + mutex_lock(&data->mutex); + + /* Don't allow changes to the offloading devices if session is busy */ + if (data->sel_card_idx >= 0 && data->status[data->sel_card_idx].prepared) + goto out; + cardidx = ucontrol->value.integer.value[0]; pcmidx = ucontrol->value.integer.value[1]; - mutex_lock(&data->mutex); if ((cardidx >= 0 && test_bit(cardidx, &data->available_card_slot))) { data->sel_card_idx = cardidx; changed = 1; @@ -162,6 +206,8 @@ static int q6usb_put_offload_dev(struct snd_kcontrol *kcontrol, data->idx_valid = true; changed = 1; } + +out: mutex_unlock(&data->mutex); return changed; @@ -187,11 +233,59 @@ static const struct snd_kcontrol_new q6usb_offload_dev_ctrl = { .put = q6usb_put_offload_dev, }; +static int q6usb_mixer_get_offload_status(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); + struct q6usb_port_data *data = dev_get_drvdata(component->dev); + int running; + int card_idx; + int pcm_idx; + + running = q6usb_find_running(data); + if (running < 0) { + card_idx = -1; + pcm_idx = -1; + } else { + card_idx = running; + pcm_idx = data->status[running].pcm_index; + } + + ucontrol->value.integer.value[0] = card_idx; + ucontrol->value.integer.value[1] = pcm_idx; + return 0; +} + +static int q6usb_offload_ctl_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 = 0; + uinfo->value.integer.max = SNDRV_CARDS; + + return 0; +} + +static const struct snd_kcontrol_new q6usb_offload_control = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .name = "Q6USB offload status", + .info = q6usb_offload_ctl_info, + .get = q6usb_mixer_get_offload_status, + .put = NULL, +}; + /* Build a mixer control for a UAC connector control (jack-detect) */ static void q6usb_connector_control_init(struct snd_soc_component *component) { int ret; + ret = snd_ctl_add(component->card->snd_card, + snd_ctl_new1(&q6usb_offload_control, component)); + if (ret < 0) + return; + ret = snd_ctl_add(component->card->snd_card, snd_ctl_new1(&q6usb_offload_dev_ctrl, component)); if (ret < 0) @@ -229,8 +323,12 @@ static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, mutex_lock(&data->mutex); if (connected) { - /* We only track the latest USB headset plugged in */ - if (!data->idx_valid || data->sel_card_idx < 0) + /* + * Update the latest USB headset plugged in, if session is + * idle. + */ + if ((!data->idx_valid || data->sel_card_idx < 0) && + !data->status[data->sel_card_idx].prepared) data->sel_card_idx = sdev->card_idx; set_bit(sdev->card_idx, &data->available_card_slot);