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ALSA: usb-audio - Workaround for misdetected sample rate with CM6207

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The CM6207 incorrectly advertises its 96 kHz playback setting as 48 kHz
in its USB device descriptor. This patch extends an existing workaround
in usbaudio.c to also cover the CM6207.

This resolves issue 0004249 in the ALSA bug tracker.

Signed-off-by: Joris van Rantwijk <jorispubl@xs4all.nl>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Joris van Rantwijk 2009-02-16 22:58:23 +01:00 committed by Takashi Iwai
parent 0412558c87
commit 3b03cc5b86
1 changed files with 2 additions and 1 deletions
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3
sound/usb/usbaudio.c
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@ -2539,7 +2539,8 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
continue;
/* C-Media CM6501 mislabels its 96 kHz altsetting */
if (rate == 48000 && nr_rates == 1 &&
chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
(chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
fp->altsetting == 5 && fp->maxpacksize == 392)
rate = 96000;
fp->rate_table[fp->nr_rates] = rate;