On 10/15/2024 2:28 PM, Wesley Cheng wrote: > Requesting to see if we can get some Acked-By tags, and merge on usb-next. Would really appreciate if we can start getting some more traction on these changes, since Pierre spent a lot of time already giving some good feedback and reviews, and I think we're in much better shape now than the initial series. With regards to the side discussion with Greg, I did not rebase this series submission on the tip, but I gave it a try offline and the patches apply cleanly to the usb-next tip, meaning no major rework needs to be done when rebased. Thanks Wesley Cheng > Several Qualcomm based chipsets can support USB audio offloading to a > dedicated audio DSP, which can take over issuing transfers to the USB > host controller. The intention is to reduce the load on the main > processors in the SoC, and allow them to be placed into lower power modes. > There are several parts to this design: > 1. Adding ASoC binding layer > 2. Create a USB backend for Q6DSP > 3. Introduce XHCI interrupter support > 4. Create vendor ops for the USB SND driver > > USB | ASoC > -------------------------------------------------------------------- > | _________________________ > | |sm8250 platform card | > | |_________________________| > | | | > | ___V____ ____V____ > | |Q6USB | |Q6AFE | > | |"codec" | |"cpu" | > | |________| |_________| > | ^ ^ ^ > | | |________| > | ___V____ | > | |SOC-USB | | > ________ ________ | | | > |USB SND |<--->|QC offld|<------------>|________| | > |(card.c)| | |<---------- | > |________| |________|___ | | | > ^ ^ | | | ____________V_________ > | | | | | |APR/GLINK | > __ V_______________V_____ | | | |______________________| > |USB SND (endpoint.c) | | | | ^ > |_________________________| | | | | > ^ | | | ___________V___________ > | | | |->|audio DSP | > ___________V_____________ | | |_______________________| > |XHCI HCD |<- | > |_________________________| | > > > Adding ASoC binding layer > ========================= > soc-usb: Intention is to treat a USB port similar to a headphone jack. > The port is always present on the device, but cable/pin status can be > enabled/disabled. Expose mechanisms for USB backend ASoC drivers to > communicate with USB SND. > > Create a USB backend for Q6DSP > ============================== > q6usb: Basic backend driver that will be responsible for maintaining the > resources needed to initiate a playback stream using the Q6DSP. Will > be the entity that checks to make sure the connected USB audio device > supports the requested PCM format. If it does not, the PCM open call will > fail, and userspace ALSA can take action accordingly. > > Introduce XHCI interrupter support > ================================== > XHCI HCD supports multiple interrupters, which allows for events to be routed > to different event rings. This is determined by "Interrupter Target" field > specified in Section "6.4.1.1 Normal TRB" of the XHCI specification. > > Events in the offloading case will be routed to an event ring that is assigned > to the audio DSP. > > Create vendor ops for the USB SND driver > ======================================== > qc_audio_offload: This particular driver has several components associated > with it: > - QMI stream request handler > - XHCI interrupter and resource management > - audio DSP memory management > > When the audio DSP wants to enable a playback stream, the request is first > received by the ASoC platform sound card. Depending on the selected route, > ASoC will bring up the individual DAIs in the path. The Q6USB backend DAI > will send an AFE port start command (with enabling the USB playback path), and > the audio DSP will handle the request accordingly. > > Part of the AFE USB port start handling will have an exchange of control > messages using the QMI protocol. The qc_audio_offload driver will populate the > buffer information: > - Event ring base address > - EP transfer ring base address > > and pass it along to the audio DSP. All endpoint management will now be handed > over to the DSP, and the main processor is not involved in transfers. > > Overall, implementing this feature will still expose separate sound card and PCM > devices for both the platform card and USB audio device: > 0 [SM8250MTPWCD938]: sm8250 - SM8250-MTP-WCD9380-WSA8810-VA-D > SM8250-MTP-WCD9380-WSA8810-VA-DMIC > 1 [Audio ]: USB-Audio - USB Audio > Generic USB Audio at usb-xhci-hcd.1.auto-1.4, high speed > > This is to ensure that userspace ALSA entities can decide which route to take > when executing the audio playback. In the above, if card#1 is selected, then > USB audio data will take the legacy path over the USB PCM drivers, etc... > > The current limitation is that the latest USB audio device that is identified > will be automatically selected by the Q6USB BE DAI for offloading. Future > patches can be added to possibly add for more flexibility, but until the userpace > applications can be better defined, having these mechanisms will complicate the > overall implementation. > > USB offload Kcontrols > ===================== > Part of the vendor offload package will have a mixer driver associated with it > (mixer_usb_offload.c). This entity will be responsible for coordinating with > SOC USB and the Q6USB backend DAI to fetch information about the sound card > and PCM device indices associated with the offload path. The logic is done > based on the current implementation of how paths are controlled within the QC > ASoC implementation. > > QC ASoC Q6Routing > ----------------- > Within the Q6 ASOC design, the registered ASoC platform card will expose a set > of kcontrols for enabling the BE DAI links to the FE DAI link. For example: > > tinymix -D 0 contents > Number of controls: 1033 > ctl type num name value > ... > 1025 BOOL 1 USB Mixer MultiMedia1 Off > 1026 BOOL 1 USB Mixer MultiMedia2 Off > 1027 BOOL 1 USB Mixer MultiMedia3 Off > 1028 BOOL 1 USB Mixer MultiMedia4 Off > 1029 BOOL 1 USB Mixer MultiMedia5 Off > 1030 BOOL 1 USB Mixer MultiMedia6 Off > 1031 BOOL 1 USB Mixer MultiMedia7 Off > 1032 BOOL 1 USB Mixer MultiMedia8 Off > > Each of these kcontrols will enable the USB BE DAI link (q6usb) to be connected > to a FE DAI link (q6asm). Since each of these controls are DAPM widgets, when > it is enabled, the DAPM widget's "connect" flag is updated accordingly. > > USB Offload Mapping > ------------------- > Based on the Q6routing, the USB BE DAI link can determine which sound card and > PCM device is enabled for offloading. Fetching the ASoC platform sound card's > information is fairly straightforward, and the bulk of the work goes to finding > the corresponding PCM device index. As mentioned above, the USB BE DAI can > traverse the DAPM widgets to find the DAPM path that is related to the control > for the "USB Mixer." Based on which "USB Mixer" is enabled, it can find the > corresponding DAPM widget associated w/ the FE DAI link (Multimedia*). From there > it can find the PCM device created for the Multimedia* stream. > > Only one BE DAI link can be enabled per FE DAI. For example, if the HDMI path is > enabled for Multimedia1, the USB Mixer will be disabled and switched over. > > Examples of kcontrol > -------------------- > tinymix -D 0 contents > Number of controls: 1033 > ctl type num name > ... > 1025 BOOL 1 USB Mixer MultiMedia1 Off > 1026 BOOL 1 USB Mixer MultiMedia2 On > 1027 BOOL 1 USB Mixer MultiMedia3 Off > 1028 BOOL 1 USB Mixer MultiMedia4 Off > 1029 BOOL 1 USB Mixer MultiMedia5 Off > 1030 BOOL 1 USB Mixer MultiMedia6 Off > 1031 BOOL 1 USB Mixer MultiMedia7 Off > 1032 BOOL 1 USB Mixer MultiMedia8 Off > > tinymix -D 2 contents > Number of controls: 7 > ctl type num name value > 0 INT 2 Playback Channel Map 0, 0 (range 0->36) > 1 BOOL 2 MDR-1ADAC Playback Switch On, On > 2 BOOL 1 MDR-1ADAC Playback Switch On > 3 INT 2 MDR-1ADAC Playback Volume 127, 127 (range 0->127) > 4 INT 1 MDR-1ADAC Playback Volume 127 (range 0->127) > 5 BOOL 1 Sony Internal Clock Validity On > 6 INT 2 USB Offload Playback Route PCM#0 0, 1 (range -1->255) > > The example highlights that the userspace/application can utilize the offload path > for the USB device on card#0 PCM device#1. > > When dealing with multiple USB audio devices, only the latest USB device identified > is going to be selected for offload capable. > > tinymix -D 1 contents > Number of controls: 9 > ctl type num name value > 0 INT 2 Capture Channel Map 0, 0 (range 0->36) > 1 INT 2 Playback Channel Map 0, 0 (range 0->36) > 2 BOOL 1 Headset Capture Switch On > 3 INT 1 Headset Capture Volume 1 (range 0->4) > 4 BOOL 1 Sidetone Playback Switch On > 5 INT 1 Sidetone Playback Volume 4096 (range 0->8192) > 6 BOOL 1 Headset Playback Switch On > 7 INT 2 Headset Playback Volume 20, 20 (range 0->24) > 8 INT 2 USB Offload Playback Route PCM#0 -1, -1 (range -1->255) > > "-1, -1" shows that this device has no route to the offload path. > > This feature was validated using: > - tinymix: set/enable the multimedia path to route to USB backend > - tinyplay: issue playback on platform card > > Changelog > -------------------------------------------- > Changes in v29: > - Fixed some phrases/wording within the SOC USB documentation, and also added an output > with aplay -l for the example output. > - Fixed allocated string buffer for creating the USB SND offload mixer, and added > a PCM index check to ensure that the pcm index is less than the expected number. > - Added a complement enable jack call if USB backend DAI link drivers need access > to it. > > Changes in v28: > - Updated comments and commit log in the stop endpoint sync patch. Clarified that > the default stop endpoint completion routine won't fully run as expected since it > has a completion associated w/ the command. > - Added a null check for sb->xhci within xhci_sideband_create_interrupter(). This > is to just ensure that caller has registered sideband before calling create > interrupter. > > Changes in v27: > - Added some comments and notes about the offload design. Enforcing the q6routing > to only allow one USB mixer (PCM device) to be enabled at a time. > - Modified SND_JACK_USB notifications for all USB audio offloadable devices plugged > in > - Rebased on latest XHCI secondary interrupter IMOD changes upstream. Modified the > change in this series to allow for XHCI sideband to set the IMOD for sideband > clients. > - Updated documentation on how USB SND kcontrols are involved in the overall design. > - Remove mutex locking from suspend/resume platform ops, as USB core ensures that the > interface and device are in the RPM_ACTIVE state while disconnect is handled. > > Changes in v26: > - Cleaned up drivers based on errors from checkpatch > - Fixed several typos using codespell > - Removed any vendor specific notation from USB SND offload mixer patch > > Changes in v25: > - Cleanups on typos mentioned within the xHCI layers > - Modified the xHCI interrupter search if clients specify interrupter index > - Moved mixer_usb_offload into its own module, so that other vendor offload USB > modules can utilize it also. > - Added support for USB audio devices that may have multiple PCM streams, as > previous implementation only assumed a single PCM device. SOC USB will be > able to handle an array of PCM indexes supported by the USB audio device. > - Added some additional checks in the QC USB offload driver to check that device > has at least one playback stream before allowing to bind > - Reordered DT bindings to fix the error found by Rob's bot. The patch that > added USB_RX was after the example was updated. > - Updated comments within SOC USB to clarify terminology and to keep it consistent > - Added SND_USB_JACK type for notifying of USB device audio connections > > Changes in v24: > - Simplified the kcontrols involved in determining how to utilize the offload > path. > - There is one kcontrol registered to each USB audio device that will > output which card/pcm device it is mapped to for the offload route. > - Removed kcontrols to track offload status and device selection. > - Default to last USB audio device plugged in as offload capable. > - kcontrol will reside on USB SND device. > - Reworked the tracking of connected USB devices from the Q6USB BE DAI link. > Previously, it was convoluted by doing it over an array, but moved to using > a list made it much simpler. Logic is still unchanged in that the last USB > headset plugged in will be selected for offloading. > - Updated the USB SOC RST documentation accordingly with new kcontrol updates. > - Added logic to fetch mapped ASoC card and pcm device index that the offload > path is mapped to for the USB SND kcontrol (for offload route). > - Re-ordered series to hopefully make reviews more readable by combining > patches based on the layer modified (ie QC ASoC, ASoC, USB sound, and USB XHCI). > > Changes in v23: > - Added MODULE_DESCRIPTION() fields to drivers that needed it. > > Changes in v22: > - Removed components tag for the ASoC platform card, as the USB SND kcontrol for > notifying userspace of offload capable card achieves similar results. > - Due to the above, had to remove the review-by tag for the RST documentation, > as changes were made to remove the components tag section. > - Took in feedback to make the SOC USB add/remove ports void. > - Fixed an issue w/ the USB SND kcontrol management for devices that have multi > UAC interfaces. (would attempt to create the kcontrol more than once) > - Modified SOC USB card and PCM index select to be based off the num_supported > streams that is specified by the USB BE DAI. > - Modified comments on selecting the latest USB headset for offloading. > > Changes in v21: > - Added an offload jack disable path from the ASoC platform driver and SOC USB. > - Refactored some of the existing SOC USB context look up APIs and created some > new helpers to search for the USB context. > - Renamed snd_soc_usb_find_format to snd_soc_usb_find_supported_format > - Removed some XHCI sideband calls that would allow clients to actually enable > the IRQ line associated w/ the secondary interrupter. This is removed because > there are other dependencies that are required for that to happen, which are not > covered as part of this series, and to avoid confusion. > - Due to the above, removed the need to export IMOD setting, and enable/disable > interrupter APIs. > > Changes in v20: > - Fixed up some formatting changes pointed out in the usb.rst > - Added SB null check during XHCI sideband unregister in case caller passes > improper argument (xhci_sideband_unregister()) > > Changes in v19: > - Rebased to usb-next to account for some new changes in dependent drivers. > > Changes in v18: > - Rebased to usb-next, which merged in part of the series. Removed these patches. > - Reworked Kconfigs for the ASoC USB related components from QCOM Q6DSP drivers > to keep dependencies in place for SoC USB and USB SND. > - Removed the repurposing of the stop ep sync API into existing XHCI operations. > This will be solely used by the XHCI sideband for now. > > Changes in v17: > - Fixed an issue where one patch was squashed into another. > - Re-added some kconfig checks for helpers exposed in USB SND for the soc usb > driver, after running different kconfigs. > > Changes in v16: > - Modified some code layer dependencies so that soc usb can be split as a separate > module. > - Split the kcontrols from ASoC QCOM common layer into a separate driver > - Reworked SOC USB kcontrols for controlling card + pcm offload routing and status > so that there are individual controls for card and pcm devices. > - Added a kcontrol remove API in SOC USB to remove the controls on the fly. This > required to add some kcontrol management to SOC USB. > - Removed the disconnect work and workqueue for the QC USB offload as it is not > required, since QMI interface driver ensures events are handled in its own WQ. > > Changes in v15: > - Removed some already merged XHCI changes > - Separated SOC USB driver from being always compiled into SOC core. Now > configurable from kconfig. > - Fixed up ASoC kcontrol naming to fit guidelines. > - Removed some unnecessary dummy ifdefs. > - Moved usb snd offload capable kcontrol to be initialized by the platform offloading > driver. > > Changes in v14: > - Cleaned up some USB SND related feedback: > - Renamed SNDUSB OFFLD playback available --> USB offload capable card > - Fixed locking while checking if stream is in use > - Replaced some mutex pairs with guard(mutex) > > Changes in v13: > - Pulled in secondary/primary interrupter rework from Mathias from: > https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/drivers/usb/host?h=fix_eventhandling > - Did some cleanup and commit message updates, and tested on current code base. > - Added mutex locking to xhci sideband to help prevent any race conditions, esp. for when accessing shared > references. > - Addressed concerns from Hillf about gfp_flags and locking used in qc_usb_audio_offload. > - Rebased onto usb-next > > Changes in v12: > - Updated copyright year to 2024. Happy new years! > - Fixed newline format on mixer offload driver. > > Changes in v11: > - Modified QMI format structures to be const > > Changes in v10: > - Added new mixer for exposing kcontrol for sound card created by USB SND. This > allows for applications to know which platform sound card has offload support. > Will return the card number. > - Broke down and cleaned up some functions/APIs within qc_audio_offload driver. > - Exported xhci_initialize_ring_info(), and modified XHCI makefile to allow for > the XHCI sideband to exist as a module. > - Reworked the jack registration and moved it to the QCOM platform card driver, > ie sm8250. > - Added an SOC USB API to fetch a standard component tag that can be appended to > the platform sound card. Added this tag to sm8250 if any USB path exists within > the DT node. > - Moved kcontrols that existed in the Q6USB driver, and made it a bit more generic, > so that naming can be standardized across solutions. SOC USB is now responsible > for creation of these kcontrols. > - Added a SOC USB RST document explaining some code flows and implementation details > so that other vendors can utilize the framework. > - Addressed a case where USB device connection events are lost if usb offload driver > (qc_audio_offload) is not probed when everything else has been initialized, ie > USB SND, SOC USB and ASoC sound card. Add a rediscover device call during module > init, to ensure that connection events will be propagated. > - Rebased to usb-next. > > Changes in v9: > - Fixed the dt binding check issue with regards to num-hc-interrupters. > > Changes in v8: > - Cleaned up snd_soc_usb_find_priv_data() based on Mark's feedback. Removed some of > the duplicate looping code that was present on previous patches. Also renamed the API. > - Integrated Mathias' suggestions on his new sideband changes: > https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=feature_interrupters > - Addressed some of Mathias' fixme tags, such as: > - Resetting transfer ring dequeue/enqueue pointers > - Issuing stop endpoint command during ep removal > - Reset ERDP properly to first segment ring during interrupter removal. (this is currently > just being cleared to 0, but should be pointing to a valid segment if controller is still > running. > > Changes in v7: > - Fixed dt check error for q6usb bindings > - Updated q6usb property from qcom,usb-audio-intr-num --> qcom,usb-audio-intr-idx > - Removed separate DWC3 HC interrupters num property, and place limits to XHCI one. > - Modified xhci_ring_to_sgtable() to use assigned IOVA/DMA address to fetch pages, as > it is not ensured event ring allocated is always done in the vmalloc range. > > Changes in v6: > - Fixed limits and description on several DT bindings (XHCI and Q6USB) > - Fixed patch subjects to follow other ALSA/ASoC notations. > > USB SND > - Addressed devices which expose multiple audio (UAC) interfaces. These devices will > create a single USB sound card with multiple audio streams, and receive multiple > interface probe routines. QC offload was not properly considering cases with multiple > probe calls. > - Renamed offload module name and kconfig to fit within the SND domain. > - Renamed attach/detach endpoint API to keep the hw_params notation. > > Changes in v5: > - Removed some unnecessary files that were included > - Fixed some typos mentioned > - Addressed dt-binding issues and added hc-interrupters definition to usb-xhci.yaml > > XHCI: > - Moved secondary skip events API to xhci-ring and updated implementation > - Utilized existing XHCI APIs, such as inc_deq and xhci_update_erst_dequeue() > > USB SND > - Renamed and reworked the APIs in "sound: usb: Export USB SND APIs for modules" patch to > include suggestions to utilize snd_usb_hw_params/free and to avoid generic naming. > - Added a resume_cb() op for completion sake. > - Addressed some locking concerns with regards to when registering for platform hooks. > - Added routine to disconnect all offloaded devices during module unbind. > > ASoC > - Replaced individual PCM parameter arguments in snd_soc_usb_connect() with new > snd_soc_usb_device structure to pass along PCM info. > - Modified snd_jack set report to notify HEADPHONE event, as we do not support record path. > > Changes in v4: > - Rebased to xhci/for-usb-next > - Addressed some dt-bindings comments > > XHCI: > - Pulled in latest changes from Mathias' feature_interrupters branch: > https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=feature_interrupters > > - Fixed commit text and signage for the XHCI sideband/interrupter related changes > - Added some logic to address the FIXME tags mentioned throughout the commits, such > as handling multi segment rings and building the SGT, locking concerns, and ep > cleanup operations. > - Removed some fixme tags for conditions that may not be needed/addressed. > - Repurposed the new endpoint stop sync API to be utilized in other places. > - Fixed potential compile issue if XHCI sideband config is not defined. > > ASoC: > - Added sound jack control into the Q6USB driver. Allows for userspsace to know when > an offload capable device is connected. > > USB SND: > - Avoided exporting _snd_pcm_hw_param_set based on Takashi's recommendation. > - Split USB QMI packet header definitions into a separate commit. This is used to > properly allow the QMI interface driver to parse and route QMI packets accordingly > - Added a "depends on" entry when enabling QC audio offload to avoid compile time > issues. > > Changes in v3: > - Changed prefix from RFC to PATCH > - Rebased entire series to usb-next > - Updated copyright years > > XHCI: > - Rebased changes on top of XHCI changes merged into usb-next, and only added > changes that were still under discussion. > - Added change to read in the "num-hc-interrupters" device property. > > ASoC: > - qusb6 USB backend > - Incorporated suggestions to fetch iommu information with existing APIs > - Added two new sound kcontrols to fetch offload status and offload device > selection. > - offload status - will return the card and pcm device in use > tinymix -D 0 get 1 --> 1, 0 (offload in progress on card#1 pcm#0) > > - device selection - set the card and pcm device to enable offload on. Ex.: > tinymix -D 0 set 1 2 0 --> sets offload on card#2 pcm#0 > (this should be the USB card) > > USB SND: > - Fixed up some locking related concerns for registering platform ops. > - Moved callbacks under the register_mutex, so that > - Modified APIs to properly pass more information about the USB SND device, so > that the Q6USB backend can build a device list/map, in order to monitor offload > status and device selection. > > Changes in v2: > > XHCI: > - Replaced XHCI and HCD changes with Mathias' XHCI interrupter changes > in his tree: > https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=feature_interrupters > > Adjustments made to Mathias' changes: > - Created xhci-intr.h to export/expose interrupter APIs versus exposing xhci.h. > Moved dependent structures to this file as well. (so clients can parse out > information from "struct xhci_interrupter") > - Added some basic locking when requesting interrupters. > - Fixed up some sanity checks. > - Removed clearing of the ERSTBA during freeing of the interrupter. (pending > issue where SMMU fault occurs if DMA addr returned is 64b - TODO) > > - Clean up pending events in the XHCI secondary interrupter. While testing USB > bus suspend, it was seen that on bus resume, the xHCI HC would run into a command > timeout. > - Added offloading APIs to xHCI to fetch transfer and event ring information. > > ASoC: > - Modified soc-usb to allow for multiple USB port additions. For this to work, > the USB offload driver has to have a reference to the USB backend by adding > a "usb-soc-be" DT entry to the device saved into XHCI sysdev. > - Created separate dt-bindings for defining USB_RX port. > - Increased APR timeout to accommodate the situation where the AFE port start > command could be delayed due to having to issue a USB bus resume while > handling the QMI stream start command. > > Mathias Nyman (3): > xhci: support setting interrupt moderation IMOD for secondary > interrupters > xhci: add helper to stop endpoint and wait for completion > xhci: sideband: add initial api to register a sideband entity > > Wesley Cheng (30): > usb: host: xhci: Repurpose event handler for skipping interrupter > events > usb: xhci: xhci-sideband: Set IMOD for xHCI sideband clients > usb: host: xhci-mem: Cleanup pending secondary event ring events > usb: host: xhci-mem: Allow for interrupter clients to choose specific > index > usb: host: xhci-plat: Set XHCI max interrupters if property is present > usb: dwc3: Specify maximum number of XHCI interrupters > ALSA: Add USB audio device jack type > ALSA: usb-audio: Export USB SND APIs for modules > ALSA: usb-audio: Check for support for requested audio format > ALSA: usb-audio: Save UAC sample size information > ALSA: usb-audio: Prevent starting of audio stream if in use > ASoC: Add SOC USB APIs for adding an USB backend > ASoC: usb: Add PCM format check API for USB backend > ASoC: usb: Create SOC USB SND jack kcontrol > ASoC: usb: Fetch ASoC card and pcm device information > ASoC: doc: Add documentation for SOC USB > ASoC: dt-bindings: qcom,q6dsp-lpass-ports: Add USB_RX port > ASoC: dt-bindings: Update example for enabling USB offload on SM8250 > ASoC: qcom: qdsp6: Introduce USB AFE port to q6dsp > ASoC: qcom: qdsp6: q6afe: Increase APR timeout > ASoC: qcom: qdsp6: Add USB backend ASoC driver for Q6 > ASoC: qcom: qdsp6: Add headphone jack for offload connection status > ASoC: qcom: qdsp6: Fetch USB offload mapped card and PCM device > ALSA: usb-audio: Introduce USB SND platform op callbacks > ALSA: usb-audio: qcom: Add USB QMI definitions > ALSA: usb-audio: qcom: Introduce QC USB SND offloading support > ALSA: usb-audio: qcom: Don't allow USB offload path if PCM device is > in use > ALSA: usb-audio: Add USB offload route kcontrol > ALSA: usb-audio: Allow for rediscovery of connected USB SND devices > ASoC: usb: Rediscover USB SND devices on USB port add > > .../bindings/sound/qcom,sm8250.yaml | 15 + > Documentation/sound/soc/index.rst | 1 + > Documentation/sound/soc/usb.rst | 491 ++++ > drivers/usb/dwc3/core.c | 12 + > drivers/usb/dwc3/core.h | 2 + > drivers/usb/dwc3/host.c | 3 + > drivers/usb/host/Kconfig | 9 + > drivers/usb/host/Makefile | 2 + > drivers/usb/host/xhci-mem.c | 37 +- > drivers/usb/host/xhci-plat.c | 2 + > drivers/usb/host/xhci-ring.c | 54 +- > drivers/usb/host/xhci-sideband.c | 425 ++++ > drivers/usb/host/xhci.c | 51 +- > drivers/usb/host/xhci.h | 19 +- > .../sound/qcom,q6dsp-lpass-ports.h | 1 + > include/linux/mod_devicetable.h | 2 +- > include/linux/usb/xhci-sideband.h | 70 + > include/sound/jack.h | 4 +- > include/sound/q6usboffload.h | 20 + > include/sound/soc-usb.h | 147 ++ > include/uapi/linux/input-event-codes.h | 3 +- > sound/core/jack.c | 6 +- > sound/soc/Kconfig | 10 + > sound/soc/Makefile | 2 + > sound/soc/qcom/Kconfig | 15 + > sound/soc/qcom/Makefile | 2 + > sound/soc/qcom/qdsp6/Makefile | 1 + > sound/soc/qcom/qdsp6/q6afe-dai.c | 60 + > sound/soc/qcom/qdsp6/q6afe.c | 194 +- > sound/soc/qcom/qdsp6/q6afe.h | 36 +- > sound/soc/qcom/qdsp6/q6dsp-lpass-ports.c | 23 + > sound/soc/qcom/qdsp6/q6dsp-lpass-ports.h | 1 + > sound/soc/qcom/qdsp6/q6routing.c | 32 +- > sound/soc/qcom/qdsp6/q6usb.c | 391 ++++ > sound/soc/qcom/sm8250.c | 24 +- > sound/soc/qcom/usb_offload_utils.c | 56 + > sound/soc/qcom/usb_offload_utils.h | 30 + > sound/soc/soc-usb.c | 369 +++ > sound/usb/Kconfig | 25 + > sound/usb/Makefile | 4 +- > sound/usb/card.c | 106 + > sound/usb/card.h | 17 + > sound/usb/endpoint.c | 1 + > sound/usb/format.c | 1 + > sound/usb/helper.c | 1 + > sound/usb/mixer_usb_offload.c | 102 + > sound/usb/mixer_usb_offload.h | 17 + > sound/usb/pcm.c | 104 +- > sound/usb/pcm.h | 11 + > sound/usb/qcom/Makefile | 2 + > sound/usb/qcom/qc_audio_offload.c | 1974 +++++++++++++++++ > sound/usb/qcom/usb_audio_qmi_v01.c | 863 +++++++ > sound/usb/qcom/usb_audio_qmi_v01.h | 164 ++ > 53 files changed, 5957 insertions(+), 57 deletions(-) > create mode 100644 Documentation/sound/soc/usb.rst > create mode 100644 drivers/usb/host/xhci-sideband.c > create mode 100644 include/linux/usb/xhci-sideband.h > create mode 100644 include/sound/q6usboffload.h > create mode 100644 include/sound/soc-usb.h > create mode 100644 sound/soc/qcom/qdsp6/q6usb.c > create mode 100644 sound/soc/qcom/usb_offload_utils.c > create mode 100644 sound/soc/qcom/usb_offload_utils.h > create mode 100644 sound/soc/soc-usb.c > create mode 100644 sound/usb/mixer_usb_offload.c > create mode 100644 sound/usb/mixer_usb_offload.h > create mode 100644 sound/usb/qcom/Makefile > create mode 100644 sound/usb/qcom/qc_audio_offload.c > create mode 100644 sound/usb/qcom/usb_audio_qmi_v01.c > create mode 100644 sound/usb/qcom/usb_audio_qmi_v01.h >
