Commit 3b03cc5b authored Feb 16, 2009 by Joris van Rantwijk Committed by Takashi Iwai Feb 16, 2009

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



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>

parent 0412558c

sound/usb/usbaudio.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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;

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