Messages in this thread | | | Date | Wed, 18 Oct 2023 13:21:43 -0700 | Subject | Re: [PATCH v9 20/34] ALSA: usb-audio: Check for support for requested audio format | From | Wesley Cheng <> |
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Hi Pierre,
On 10/17/2023 3:29 PM, Pierre-Louis Bossart wrote: > > > On 10/17/23 15:00, Wesley Cheng wrote: >> Allow for checks on a specific USB audio device to see if a requested PCM >> format is supported. This is needed for support for when playback is > > This is needed for support when playback is >
Will fix this typo
>> initiated by the ASoC USB backend path. >> >> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> >> --- >> sound/usb/card.c | 40 ++++++++++++++++++++++++++++++++++++++++ >> sound/usb/card.h | 11 +++++++++++ >> 2 files changed, 51 insertions(+) >> >> diff --git a/sound/usb/card.c b/sound/usb/card.c >> index c0b312e264bf..88f431917c15 100644 >> --- a/sound/usb/card.c >> +++ b/sound/usb/card.c >> @@ -162,6 +162,46 @@ int snd_usb_unregister_platform_ops(void) >> } >> EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); >> >> +/* >> + * Checks to see if requested audio profile, i.e sample rate, # of >> + * channels, etc... is supported by the substream associated to the >> + * USB audio device. >> + */ >> +struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, >> + struct snd_pcm_hw_params *params, int direction) >> +{ >> + struct snd_usb_audio *chip; >> + struct snd_usb_substream *subs = NULL; > > useless init? >
Agreed.
Thanks Wesley Cheng
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