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Tue, 25 Jul 2023 02:34:43 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 36P2Yheh015135 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Jul 2023 02:34:43 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Mon, 24 Jul 2023 19:34:41 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , , CC: , , , , , , , , , , , Wesley Cheng Subject: [PATCH v4 19/32] sound: usb: card: Check for support for requested audio format Date: Mon, 24 Jul 2023 19:34:03 -0700 Message-ID: <20230725023416.11205-20-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230725023416.11205-1-quic_wcheng@quicinc.com> References: <20230725023416.11205-1-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 nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 1R-QArTOF-M_YbbnYKbt_CoeiCY3Buee X-Proofpoint-ORIG-GUID: 1R-QArTOF-M_YbbnYKbt_CoeiCY3Buee X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-24_18,2023-07-24_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 mlxlogscore=999 phishscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 suspectscore=0 malwarescore=0 mlxscore=0 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307250021 Message-ID-Hash: N66R5WKRDUAHJIXK5AFPL7VACIOW3OET X-Message-ID-Hash: N66R5WKRDUAHJIXK5AFPL7VACIOW3OET X-MailFrom: quic_wcheng@quicinc.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Allow for checks on a specific USB audio device to see if a requested PCM format is supported. This is needed for support for when playback is initiated by the ASoC USB backend path. Signed-off-by: Wesley Cheng --- sound/usb/card.c | 28 ++++++++++++++++++++++++++++ sound/usb/card.h | 8 ++++++++ 2 files changed, 36 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index a3fad66a3337..365f6d978608 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -142,6 +142,34 @@ int snd_usb_unregister_platform_ops(void) } EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction) +{ + struct snd_usb_audio *chip = usb_chip[card_idx]; + struct snd_usb_substream *subs = NULL; + struct snd_usb_stream *as; + const struct audioformat *fmt; + + if (!chip) + return NULL; + + mutex_lock(&chip->mutex); + if (enable[card_idx]) { + list_for_each_entry(as, &chip->pcm_list, list) { + subs = &as->substream[direction]; + fmt = find_substream_format(subs, params); + if (fmt) { + mutex_unlock(&chip->mutex); + return as; + } + } + } + mutex_unlock(&chip->mutex); + + return NULL; +} +EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream); + /* * disconnect streams * called from usb_audio_disconnect() diff --git a/sound/usb/card.h b/sound/usb/card.h index c48744724f7d..6d0f76ffec9d 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -216,6 +216,8 @@ struct snd_usb_platform_ops { #if IS_ENABLED(CONFIG_SND_USB_AUDIO) int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction); #else static int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops) { @@ -226,5 +228,11 @@ static int snd_usb_unregister_platform_ops(void) { return -EOPNOTSUPP; } + +static struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction) +{ + return NULL; +} #endif /* IS_ENABLED(CONFIG_SND_USB_AUDIO) */ #endif /* __USBAUDIO_CARD_H */