@@ -2253,8 +2253,15 @@ device_setup
22532253 Default: 0x0000
22542254ignore_ctl_error
22552255 Ignore any USB-controller regarding mixer interface (default: no)
2256+ ``ignore_ctl_error=1 `` may help when you get an error at accessing
2257+ the mixer element such as URB error -22. This happens on some
2258+ buggy USB device or the controller. This workaround corresponds to
2259+ the ``quirk_flags `` bit 14, too.
22562260autoclock
22572261 Enable auto-clock selection for UAC2 devices (default: yes)
2262+ lowlatency
2263+ Enable low latency playback mode (default: yes).
2264+ Could disable it to switch back to the old mode if face a regression.
22582265quirk_alias
22592266 Quirk alias list, pass strings like ``0123abcd:5678beef ``, which
22602267 applies the existing quirk for the device 5678:beef to a new
@@ -2284,6 +2291,11 @@ delayed_register
22842291 The driver prints a message like "Found post-registration device
22852292 assignment: 1234abcd:04" for such a device, so that user can
22862293 notice the need.
2294+ skip_validation
2295+ Skip unit descriptor validation (default: no).
2296+ The option is used to ignores the validation errors with the hexdump
2297+ of the unit descriptor instead of a driver probe error, so that we
2298+ can check its details.
22872299quirk_flags
22882300 Contains the bit flags for various device specific workarounds.
22892301 Applied to the corresponding card index.
@@ -2307,17 +2319,26 @@ quirk_flags
23072319 * bit 16: Set up the interface at first like UAC1
23082320 * bit 17: Apply the generic implicit feedback sync mode
23092321 * bit 18: Don't apply implicit feedback sync mode
2322+ * bit 19: Don't closed interface during setting sample rate
2323+ * bit 20: Force an interface reset whenever stopping & restarting
2324+ a stream
2325+ * bit 21: Do not set PCM rate (frequency) when only one rate is
2326+ available for the given endpoint.
2327+ * bit 22: Set the fixed resolution 16 for Mic Capture Volume
2328+ * bit 23: Set the fixed resolution 384 for Mic Capture Volume
2329+ * bit 24: Set minimum volume control value as mute for devices
2330+ where the lowest playback value represents muted state instead
2331+ of minimum audible volume
23102332
23112333This module supports multiple devices, autoprobe and hotplugging.
23122334
23132335NB: ``nrpacks `` parameter can be modified dynamically via sysfs.
23142336Don't put the value over 20. Changing via sysfs has no sanity
23152337check.
23162338
2317- NB: ``ignore_ctl_error=1 `` may help when you get an error at accessing
2318- the mixer element such as URB error -22. This happens on some
2319- buggy USB device or the controller. This workaround corresponds to
2320- the ``quirk_flags `` bit 14, too.
2339+ NB: ``ignore_ctl_error=1 `` just provides a quick way to work around the
2340+ issues. If you have a buggy device that requires these quirks, please
2341+ report it to the upstream.
23212342
23222343NB: ``quirk_alias `` option is provided only for testing / development.
23232344If you want to have a proper support, contact to upstream for
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