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Tue, 13 Feb 2024 00:54:45 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; Mon, 12 Feb 2024 16:54:45 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Wesley Cheng Subject: [PATCH v15 45/50] ASoC: usb: Fetch ASoC sound card information Date: Mon, 12 Feb 2024 16:54:17 -0800 Message-ID: <20240213005422.3121-46-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240213005422.3121-1-quic_wcheng@quicinc.com> References: <20240213005422.3121-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: eo9G6cgPzrv80LvHTH8TiioBPqrI4_An X-Proofpoint-ORIG-GUID: eo9G6cgPzrv80LvHTH8TiioBPqrI4_An X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-12_20,2024-02-12_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 clxscore=1015 adultscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402130005 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790745683567358127 X-GMAIL-MSGID: 1790745683567358127 For USB sound to expose mixer controls to fetch information about the ASoC sound card, add an API that returns the platform sound card number that is registered with SOC USB. Knowing this allows for applications to further query about the offload status. Signed-off-by: Wesley Cheng --- include/sound/soc-usb.h | 6 ++++++ sound/soc/soc-usb.c | 26 ++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h index b75a48986b6e..e864a44e7cfa 100644 --- a/include/sound/soc-usb.h +++ b/include/sound/soc-usb.h @@ -74,6 +74,7 @@ int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params, int snd_soc_usb_connect(struct device *usbdev, struct snd_soc_usb_device *sdev); int snd_soc_usb_disconnect(struct device *usbdev, struct snd_soc_usb_device *sdev); void *snd_soc_usb_find_priv_data(struct device *dev); +int snd_soc_usb_device_offload_available(struct device *dev); int snd_soc_usb_prepare_session(struct snd_soc_usb *usb, int card_idx, int pcm_idx); int snd_soc_usb_shutdown_session(struct snd_soc_usb *usb, int session_id); @@ -117,6 +118,11 @@ static inline void *snd_soc_usb_find_priv_data(struct device *dev) return NULL; } +static inline int snd_soc_usb_device_offload_available(struct device *dev) +{ + return -ENODEV; +} + static inline int snd_soc_usb_prepare_session(struct snd_soc_usb *usb, int card_idx, int pcm_idx) { diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c index f2e83c2d68fd..9de5b9ed0cea 100644 --- a/sound/soc/soc-usb.c +++ b/sound/soc/soc-usb.c @@ -339,6 +339,32 @@ int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params, } EXPORT_SYMBOL_GPL(snd_soc_usb_find_format); +/** + * snd_soc_usb_device_offload_available() - Fetch BE DAI link sound card + * @dev: the device to find in SOC USB + * + * Finds the component linked to a specific SOC USB instance, and returns + * the sound card number for the platform card supporting offloading. + * + */ +int snd_soc_usb_device_offload_available(struct device *dev) +{ + struct snd_soc_usb *ctx; + struct device_node *node; + + node = snd_soc_find_phandle(dev); + if (IS_ERR(node)) + return -ENODEV; + + ctx = snd_soc_find_usb_ctx(node); + of_node_put(node); + if (!ctx) + return -ENODEV; + + return ctx->component->card->snd_card->number; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_device_offload_available); + /** * snd_soc_usb_allocate_port() - allocate a SOC USB device * @component: USB DPCM backend DAI component