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| author | Julian Scheel <julian@jusst.de> | 2022-01-21 18:53:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-26 16:06:08 +0300 |
| commit | a7339e4f5788bd088bb0be1f96a6cce459676ed0 (patch) | |
| tree | 18e6f798108563a7e475508e7bb2ba382f848712 /Documentation/usb | |
| parent | eb3a1ce6f5ed2c047bcae4aad76b7ee711715c7d (diff) | |
| download | linux-a7339e4f5788bd088bb0be1f96a6cce459676ed0.tar.xz | |
usb: gadget: f_uac2: Support multiple sampling rates
A list of sampling rates can be specified via configfs. All enabled
sampling rates are sent to the USB host on request. When the host
selects a sampling rate, the internal active rate (stored in
struct f_uac2) is updated.
The gadget no longer supports only one frequency. Therefore USB strings
corresponding to the clock sources are renamed from specific Hz value to
general names Input clock/Output clock.
Config strings with single value stay compatible with the previous
version.
Multiple samplerates passed as configuration arrays to g_audio module
when built for f_uac2.
Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20220121155308.48794-6-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/usb')
| -rw-r--r-- | Documentation/usb/gadget-testing.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst index cbbd948c626f..419f6e5e890a 100644 --- a/Documentation/usb/gadget-testing.rst +++ b/Documentation/usb/gadget-testing.rst @@ -726,7 +726,7 @@ The uac2 function provides these attributes in its function directory: ================ ==================================================== c_chmask capture channel mask - c_srate capture sampling rate + c_srate list of capture sampling rates (comma-separated) c_ssize capture sample size (bytes) c_sync capture synchronization type (async/adaptive) c_mute_present capture mute control enable @@ -736,7 +736,7 @@ The uac2 function provides these attributes in its function directory: c_volume_res capture volume control resolution (in 1/256 dB) fb_max maximum extra bandwidth in async mode p_chmask playback channel mask - p_srate playback sampling rate + p_srate list of playback sampling rates (comma-separated) p_ssize playback sample size (bytes) p_mute_present playback mute control enable p_volume_present playback volume control enable |