ALSA: usb-audio - Workaround for misdetected sample rate with CM6207
Joris van Rantwijk [Mon, 16 Feb 2009 21:58:23 +0000 (22:58 +0100)]
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>

sound/usb/usbaudio.c

index 8086309..19e3745 100644 (file)
@@ -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;