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 37/41] ALSA: usb-audio: Allow for rediscovery of connected USB SND devices
Date: Mon, 22 Apr 2024 15:49:02 -0700 [thread overview]
Message-ID: <20240422224906.15868-38-quic_wcheng@quicinc.com> (raw)
In-Reply-To: <20240422224906.15868-1-quic_wcheng@quicinc.com>
In case of notifying SND platform drivers of connection events, some of
these use cases, such as offloading, require an ASoC USB backend device to
be initialized before the events can be handled. If the USB backend device
has not yet been probed, this leads to missing initial USB audio device
connection events.
Expose an API that traverses the usb_chip array for connected devices, and
to call the respective connection callback registered to the SND platform
driver.
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
---
sound/usb/card.c | 21 +++++++++++++++++++++
sound/usb/card.h | 1 +
sound/usb/qcom/qc_audio_offload.c | 2 ++
3 files changed, 24 insertions(+)
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 1ad99a462038..8364c5b8fbbf 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -186,6 +186,27 @@ struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx,
}
EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream);
+/*
+ * in case the platform driver was not ready at the time of USB SND
+ * device connect, expose an API to discover all connected USB devices
+ * so it can populate any dependent resources/structures.
+ */
+void snd_usb_rediscover_devices(void)
+{
+ int i;
+
+ guard(mutex)(®ister_mutex);
+
+ if (!platform_ops || !platform_ops->connect_cb)
+ return;
+
+ for (i = 0; i < SNDRV_CARDS; i++) {
+ if (usb_chip[i])
+ platform_ops->connect_cb(usb_chip[i]);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices);
+
/*
* disconnect streams
* called from usb_audio_disconnect()
diff --git a/sound/usb/card.h b/sound/usb/card.h
index 3c900e5afbce..140928dd9d63 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -221,4 +221,5 @@ 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);
+void snd_usb_rediscover_devices(void);
#endif /* __USBAUDIO_CARD_H */
diff --git a/sound/usb/qcom/qc_audio_offload.c b/sound/usb/qcom/qc_audio_offload.c
index 6a25a390f8ae..9695bf0ac1cd 100644
--- a/sound/usb/qcom/qc_audio_offload.c
+++ b/sound/usb/qcom/qc_audio_offload.c
@@ -1879,6 +1879,8 @@ static int __init qc_usb_audio_offload_init(void)
if (ret < 0)
goto release_qmi;
+ snd_usb_rediscover_devices();
+
return 0;
release_qmi:
next prev parent reply other threads:[~2024-04-22 22:49 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 ` [PATCH v19 21/41] ALSA: usb-audio: Check for support for requested audio format Wesley Cheng
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 ` Wesley Cheng [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240422224906.15868-38-quic_wcheng@quicinc.com \
--to=quic_wcheng@quicinc.com \
--cc=Thinh.Nguyen@synopsys.com \
--cc=alsa-devel@alsa-project.org \
--cc=andersson@kernel.org \
--cc=bgoswami@quicinc.com \
--cc=broonie@kernel.org \
--cc=conor+dt@kernel.org \
--cc=corbet@lwn.net \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=konrad.dybcio@linaro.org \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=lgirdwood@gmail.com \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sound@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mathias.nyman@intel.com \
--cc=perex@perex.cz \
--cc=robh@kernel.org \
--cc=srinivas.kandagatla@linaro.org \
--cc=tiwai@suse.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).