From c7a13264918b9796f80c634f20fea56e1612572d Mon Sep 17 00:00:00 2001 From: Jussi Laako Date: Mon, 18 Feb 2019 00:17:21 +0200 Subject: ALSA: usb-audio: Expose sample resolution through proc interface At least some USB devices use (MSB-aligned) audio format larger than the actual resolution of the device. In order to expose the actual device resolution (bBitResolution), add extra field to the procfs stream info interface. Signed-off-by: Jussi Laako Signed-off-by: Takashi Iwai --- sound/usb/format.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'sound/usb/format.c') diff --git a/sound/usb/format.c b/sound/usb/format.c index fd13ac11b136..3ee7d6f853b7 100644 --- a/sound/usb/format.c +++ b/sound/usb/format.c @@ -87,6 +87,8 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip, } } + fp->fmt_bits = sample_width; + if ((pcm_formats == 0) && (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) { /* some devices don't define this correctly... */ -- cgit v1.2.3