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Wed, 20 Dec 2023 22:46:01 +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 3BKMk0hh013982 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 20 Dec 2023 22:46:00 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; Wed, 20 Dec 2023 14:45:59 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v11 20/41] ALSA: usb-audio: Check for support for requested audio format Date: Wed, 20 Dec 2023 14:45:23 -0800 Message-ID: <20231220224544.18031-21-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231220224544.18031-1-quic_wcheng@quicinc.com> References: <20231220224544.18031-1-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: yHRJu1Ug90JYo7bmi8nl4ZNfD5TfDBKe X-Proofpoint-GUID: yHRJu1Ug90JYo7bmi8nl4ZNfD5TfDBKe 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 impostorscore=0 spamscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 priorityscore=1501 adultscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312200162 Message-ID-Hash: VSSPV54BNAOK4RUC5NJDN3YMO3UZZRP2 X-Message-ID-Hash: VSSPV54BNAOK4RUC5NJDN3YMO3UZZRP2 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: 3.3.9 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 when playback is initiated by the ASoC USB backend path. Signed-off-by: Wesley Cheng --- sound/usb/card.c | 40 ++++++++++++++++++++++++++++++++++++++++ sound/usb/card.h | 11 +++++++++++ 2 files changed, 51 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index c0b312e264bf..11b827b7a2a5 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -162,6 +162,46 @@ int snd_usb_unregister_platform_ops(void) } EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); +/* + * Checks to see if requested audio profile, i.e sample rate, # of + * channels, etc... is supported by the substream associated to the + * USB audio device. + */ +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; + struct snd_usb_substream *subs; + struct snd_usb_stream *as; + const struct audioformat *fmt; + + /* + * Register mutex is held when populating and clearing usb_chip + * array. + */ + mutex_lock(®ister_mutex); + chip = usb_chip[card_idx]; + if (!chip) { + mutex_unlock(®ister_mutex); + return NULL; + } + + if (enable[card_idx]) { + list_for_each_entry(as, &chip->pcm_list, list) { + subs = &as->substream[direction]; + fmt = snd_usb_find_substream_format(subs, params); + if (fmt) { + mutex_unlock(®ister_mutex); + return as; + } + } + } + mutex_unlock(®ister_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 02e4ea898db5..ed4a664e24e5 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -217,4 +217,15 @@ struct snd_usb_platform_ops { int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); + +#if IS_ENABLED(CONFIG_SND_USB_AUDIO) +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, + struct snd_pcm_hw_params *params, int direction); +#else +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 */