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>,
<krzk+dt@kernel.org>, <gregkh@linuxfoundation.org>,
<Thinh.Nguyen@synopsys.com>, <broonie@kernel.org>,
<bgoswami@quicinc.com>, <tiwai@suse.com>, <bagasdotme@gmail.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 v21 12/39] ALSA: usb-audio: Introduce USB SND platform op callbacks
Date: Tue, 7 May 2024 12:50:49 -0700 [thread overview]
Message-ID: <20240507195116.9464-13-quic_wcheng@quicinc.com> (raw)
In-Reply-To: <20240507195116.9464-1-quic_wcheng@quicinc.com>
Allow for different platforms to be notified on USB SND connect/disconnect
seqeunces. This allows for platform USB SND modules to properly initialize
and populate internal structures with references to the USB SND chip
device.
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
---
sound/usb/card.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
sound/usb/card.h | 9 ++++++++
2 files changed, 62 insertions(+)
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 1b2edc0fd2e9..ca4f3bc1b42d 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -118,6 +118,42 @@ MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no)
static DEFINE_MUTEX(register_mutex);
static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
static struct usb_driver usb_audio_driver;
+static struct snd_usb_platform_ops *platform_ops;
+
+/*
+ * Register platform specific operations that will be notified on events
+ * which occur in USB SND. The platform driver can utilize this path to
+ * enable features, such as USB audio offloading, which allows for audio data
+ * to be queued by an audio DSP.
+ *
+ * Only one set of platform operations can be registered to USB SND. The
+ * platform register operation is protected by the register_mutex.
+ */
+int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops)
+{
+ guard(mutex)(®ister_mutex);
+ if (platform_ops)
+ return -EEXIST;
+
+ platform_ops = ops;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops);
+
+/*
+ * Unregisters the current set of platform operations. This allows for
+ * a new set to be registered if required.
+ *
+ * The platform unregister operation is protected by the register_mutex.
+ */
+int snd_usb_unregister_platform_ops(void)
+{
+ guard(mutex)(®ister_mutex);
+ platform_ops = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops);
/*
* disconnect streams
@@ -910,7 +946,11 @@ static int usb_audio_probe(struct usb_interface *intf,
chip->num_interfaces++;
usb_set_intfdata(intf, chip);
atomic_dec(&chip->active);
+
+ if (platform_ops && platform_ops->connect_cb)
+ platform_ops->connect_cb(chip);
mutex_unlock(®ister_mutex);
+
return 0;
__error:
@@ -947,6 +987,9 @@ static void usb_audio_disconnect(struct usb_interface *intf)
card = chip->card;
mutex_lock(®ister_mutex);
+ if (platform_ops && platform_ops->disconnect_cb)
+ platform_ops->disconnect_cb(chip);
+
if (atomic_inc_return(&chip->shutdown) == 1) {
struct snd_usb_stream *as;
struct snd_usb_endpoint *ep;
@@ -1090,6 +1133,11 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
chip->system_suspend = chip->num_suspended_intf;
}
+ mutex_lock(®ister_mutex);
+ if (platform_ops && platform_ops->suspend_cb)
+ platform_ops->suspend_cb(intf, message);
+ mutex_unlock(®ister_mutex);
+
return 0;
}
@@ -1130,6 +1178,11 @@ static int usb_audio_resume(struct usb_interface *intf)
snd_usb_midi_v2_resume_all(chip);
+ mutex_lock(®ister_mutex);
+ if (platform_ops && platform_ops->resume_cb)
+ platform_ops->resume_cb(intf);
+ mutex_unlock(®ister_mutex);
+
out:
if (chip->num_suspended_intf == chip->system_suspend) {
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
diff --git a/sound/usb/card.h b/sound/usb/card.h
index 6ec95b2edf86..2884912adc96 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -207,4 +207,13 @@ struct snd_usb_stream {
struct list_head list;
};
+struct snd_usb_platform_ops {
+ void (*connect_cb)(struct snd_usb_audio *chip);
+ void (*disconnect_cb)(struct snd_usb_audio *chip);
+ void (*suspend_cb)(struct usb_interface *intf, pm_message_t message);
+ void (*resume_cb)(struct usb_interface *intf);
+};
+
+int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops);
+int snd_usb_unregister_platform_ops(void);
#endif /* __USBAUDIO_CARD_H */
next prev parent reply other threads:[~2024-05-07 19:51 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-07 19:50 [PATCH v21 00/39] Introduce QC USB SND audio offloading support Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 01/39] xhci: add helper to stop endpoint and wait for completion Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 02/39] usb: host: xhci: Repurpose event handler for skipping interrupter events Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 03/39] xhci: sideband: add initial api to register a sideband entity Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 04/39] usb: xhci: Allow for secondary interrupter to set IMOD Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 05/39] usb: host: xhci-mem: Cleanup pending secondary event ring events Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 06/39] usb: host: xhci-mem: Allow for interrupter clients to choose specific index Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 07/39] ASoC: Add SOC USB APIs for adding an USB backend Wesley Cheng
2024-05-07 20:26 ` Pierre-Louis Bossart
2024-05-08 20:16 ` Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 08/39] ASoC: dt-bindings: qcom,q6dsp-lpass-ports: Add USB_RX port Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 09/39] ASoC: qcom: qdsp6: Introduce USB AFE port to q6dsp Wesley Cheng
2024-05-07 20:37 ` Pierre-Louis Bossart
2024-05-08 23:34 ` Wesley Cheng
2024-05-09 12:54 ` Pierre-Louis Bossart
2024-05-09 21:34 ` Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 10/39] ASoC: qdsp6: q6afe: Increase APR timeout Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 11/39] ASoC: qcom: qdsp6: Add USB backend ASoC driver for Q6 Wesley Cheng
2024-05-07 20:39 ` Pierre-Louis Bossart
2024-05-07 19:50 ` Wesley Cheng [this message]
2024-05-07 19:50 ` [PATCH v21 13/39] ALSA: usb-audio: Export USB SND APIs for modules Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 14/39] ALSA: usb-audio: Save UAC sample size information Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 15/39] usb: dwc3: Specify maximum number of XHCI interrupters Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 16/39] usb: host: xhci-plat: Set XHCI max interrupters if property is present Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 17/39] ALSA: usb-audio: qcom: Add USB QMI definitions Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 18/39] ALSA: usb-audio: qcom: Introduce QC USB SND offloading support Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 19/39] ALSA: usb-audio: Check for support for requested audio format Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 20/39] ASoC: usb: Add PCM format check API for USB backend Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 21/39] ASoC: qcom: qdsp6: Ensure PCM format is supported by USB audio device Wesley Cheng
2024-05-07 19:50 ` [PATCH v21 22/39] ALSA: usb-audio: Prevent starting of audio stream if in use Wesley Cheng
2024-05-07 21:20 ` Pierre-Louis Bossart
2024-05-08 23:40 ` Wesley Cheng
2024-05-09 13:01 ` Pierre-Louis Bossart
2024-05-09 21:38 ` Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 23/39] ALSA: usb-audio: Do not allow USB offload path if PCM device is " Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 24/39] ASoC: dt-bindings: Update example for enabling USB offload on SM8250 Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 25/39] ALSA: usb-audio: qcom: Populate PCM and USB chip information Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 26/39] ASoC: qcom: qdsp6: Add support to track available USB PCM devices Wesley Cheng
2024-05-07 21:23 ` Pierre-Louis Bossart
2024-05-08 23:57 ` Wesley Cheng
2024-05-09 13:02 ` Pierre-Louis Bossart
2024-05-09 21:49 ` Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 27/39] ASoC: Introduce SND kcontrols to select sound card and PCM device Wesley Cheng
2024-05-07 21:26 ` Pierre-Louis Bossart
2024-05-09 0:10 ` Wesley Cheng
2024-05-09 13:07 ` Pierre-Louis Bossart
2024-05-09 22:32 ` Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 28/39] ASoC: qcom: qdsp6: Add SOC USB offload select get/put callbacks Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 29/39] ASoC: Introduce SND kcontrols to track USB offloading state Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 30/39] ASoC: qcom: qdsp6: Add PCM ops to track current state Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 31/39] ASoC: usb: Create SOC USB SND jack kcontrol Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 32/39] ASoC: qcom: qdsp6: Add headphone jack for offload connection status Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 33/39] ASoC: usb: Fetch ASoC sound card information Wesley Cheng
2024-05-07 21:33 ` Pierre-Louis Bossart
2024-05-09 0:13 ` Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 34/39] ALSA: usb-audio: Add USB offloading capable kcontrol Wesley Cheng
2024-05-07 21:37 ` Pierre-Louis Bossart
2024-05-08 19:41 ` Wesley Cheng
2024-05-09 0:42 ` Wesley Cheng
2024-05-09 13:11 ` Pierre-Louis Bossart
2024-05-09 22:05 ` Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 35/39] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 36/39] ALSA: usb-audio: qcom: Use card and PCM index from QMI request Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 37/39] ASoC: usb: Rediscover USB SND devices on USB port add Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 38/39] ASoC: qcom: Populate SoC components string Wesley Cheng
2024-05-07 21:40 ` Pierre-Louis Bossart
2024-05-08 20:06 ` Wesley Cheng
2024-05-09 13:17 ` Pierre-Louis Bossart
2024-05-09 22:09 ` Wesley Cheng
2024-05-07 19:51 ` [PATCH v21 39/39] ASoC: doc: Add documentation for SOC USB Wesley Cheng
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