From: Wesley Cheng <quic_wcheng@quicinc.com>
To: <srinivas.kandagatla@linaro.org>, <mathias.nyman@intel.com>,
<perex@perex.cz>, <conor+dt@kernel.org>, <corbet@lwn.net>,
<lgirdwood@gmail.com>, <andersson@kernel.org>,
<krzysztof.kozlowski+dt@linaro.org>, <gregkh@linuxfoundation.org>,
<Thinh.Nguyen@synopsys.com>, <broonie@kernel.org>,
<bgoswami@quicinc.com>, <tiwai@suse.com>, <robh@kernel.org>,
<konrad.dybcio@linaro.org>
Cc: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-sound@vger.kernel.org>, <linux-usb@vger.kernel.org>,
<linux-arm-msm@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<alsa-devel@alsa-project.org>,
Wesley Cheng <quic_wcheng@quicinc.com>
Subject: [PATCH v19 21/41] ALSA: usb-audio: Check for support for requested audio format
Date: Mon, 22 Apr 2024 15:48:46 -0700 [thread overview]
Message-ID: <20240422224906.15868-22-quic_wcheng@quicinc.com> (raw)
In-Reply-To: <20240422224906.15868-1-quic_wcheng@quicinc.com>
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 <quic_wcheng@quicinc.com>
---
sound/usb/card.c | 31 +++++++++++++++++++++++++++++++
sound/usb/card.h | 3 +++
2 files changed, 34 insertions(+)
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 7dc8007ba839..1ad99a462038 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -155,6 +155,37 @@ 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;
+
+ /*
+ * Register mutex is held when populating and clearing usb_chip
+ * array.
+ */
+ guard(mutex)(®ister_mutex);
+ chip = usb_chip[card_idx];
+
+ if (chip && enable[card_idx]) {
+ list_for_each_entry(as, &chip->pcm_list, list) {
+ subs = &as->substream[direction];
+ if (snd_usb_find_substream_format(subs, params))
+ return as;
+ }
+ }
+
+ 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..d66cc0b139af 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -217,4 +217,7 @@ struct snd_usb_platform_ops {
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);
#endif /* __USBAUDIO_CARD_H */
next prev parent reply other threads:[~2024-04-22 22:50 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-22 22:48 [PATCH v19 00/41] Introduce QC USB SND audio offloading support Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 01/41] xhci: add helper to stop endpoint and wait for completion Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 02/41] usb: host: xhci: Export enable and disable interrupter APIs Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 03/41] usb: host: xhci: Repurpose event handler for skipping interrupter events Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 04/41] xhci: export XHCI IMOD setting helper for interrupters Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 05/41] xhci: sideband: add initial api to register a sideband entity Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 06/41] usb: host: xhci-sideband: Expose a sideband interrupter enable API Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 07/41] usb: host: xhci-mem: Cleanup pending secondary event ring events Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 08/41] usb: host: xhci-mem: Allow for interrupter clients to choose specific index Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 09/41] ASoC: Add SOC USB APIs for adding an USB backend Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 10/41] ASoC: dt-bindings: qcom,q6dsp-lpass-ports: Add USB_RX port Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 11/41] ASoC: qcom: qdsp6: Introduce USB AFE port to q6dsp Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 12/41] ASoC: qdsp6: q6afe: Increase APR timeout Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 13/41] ASoC: qcom: qdsp6: Add USB backend ASoC driver for Q6 Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 14/41] ALSA: usb-audio: Introduce USB SND platform op callbacks Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 15/41] ALSA: usb-audio: Export USB SND APIs for modules Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 16/41] ALSA: usb-audio: Save UAC sample size information Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 17/41] usb: dwc3: Specify maximum number of XHCI interrupters Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 18/41] usb: host: xhci-plat: Set XHCI max interrupters if property is present Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 19/41] ALSA: usb-audio: qcom: Add USB QMI definitions Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 20/41] ALSA: usb-audio: qcom: Introduce QC USB SND offloading support Wesley Cheng
2024-04-22 22:48 ` Wesley Cheng [this message]
2024-04-22 22:48 ` [PATCH v19 22/41] ASoC: usb: Add PCM format check API for USB backend Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 23/41] ASoC: qcom: qdsp6: Ensure PCM format is supported by USB audio device Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 24/41] ALSA: usb-audio: Prevent starting of audio stream if in use Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 25/41] ALSA: usb-audio: Do not allow USB offload path if PCM device is " Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 26/41] ASoC: dt-bindings: Update example for enabling USB offload on SM8250 Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 27/41] ALSA: usb-audio: qcom: Populate PCM and USB chip information Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 28/41] ASoC: qcom: qdsp6: Add support to track available USB PCM devices Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 29/41] ASoC: Introduce SND kcontrols to select sound card and PCM device Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 30/41] ASoC: qcom: qdsp6: Add SOC USB offload select get/put callbacks Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 31/41] ASoC: Introduce SND kcontrols to track USB offloading state Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 32/41] ASoC: qcom: qdsp6: Add PCM ops to track current state Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 33/41] ASoC: usb: Create SOC USB SND jack kcontrol Wesley Cheng
2024-04-22 22:48 ` [PATCH v19 34/41] ASoC: qcom: qdsp6: Add headphone jack for offload connection status Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 35/41] ASoC: usb: Fetch ASoC sound card information Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 36/41] ALSA: usb-audio: Add USB offloading capable kcontrol Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 37/41] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 38/41] ALSA: usb-audio: qcom: Use card and PCM index from QMI request Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 39/41] ASoC: usb: Rediscover USB SND devices on USB port add Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 40/41] ASoC: qcom: Populate SoC components string Wesley Cheng
2024-04-22 22:49 ` [PATCH v19 41/41] ASoC: doc: Add documentation for SOC USB Wesley Cheng
2024-04-23 1:43 ` Bagas Sanjaya
2024-04-23 22:48 ` Wesley Cheng
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