[alsa-devel] [PATCH] teac ud-501/ud-503 usb delay

[Takashi Iwai]

On Tue, 26 Jan 2016 00:28:27 +0100,
Guillaume Fougnies wrote:
> 
> ALSA: usb: Fix TEAC UD-501/UD-503/NT-503 usb delay
> 
> TEAC UD-501/UD-503/NT-503 fail to switch properly between different rate/format.
> Similar to 'Playback Design', this patch corrects the invalid clock source error
> for TEAC products and avoids complete freeze of the usb interface of 503 series.
> 
> Signed-off-by: Guillaume Fougnies <guillaume at eulerian.com>

Applied, thanks.


Takashi

> ---
>  sound/usb/quirks.c | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
> index 23ea6d8..a75d9ce 100644
> --- a/sound/usb/quirks.c
> +++ b/sound/usb/quirks.c
> @@ -1205,8 +1205,12 @@ void snd_usb_set_interface_quirk(struct usb_device *dev)
>  	 * "Playback Design" products need a 50ms delay after setting the
>  	 * USB interface.
>  	 */
> -	if (le16_to_cpu(dev->descriptor.idVendor) == 0x23ba)
> +	switch (le16_to_cpu(dev->descriptor.idVendor)) {
> +	case 0x23ba: /* Playback Design */
> +	case 0x0644: /* TEAC Corp. */
>  		mdelay(50);
> +		break;
> +	}
>  }
>  
>  void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
> @@ -1221,6 +1225,14 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
>  	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
>  		mdelay(20);
>  
> +	/*
> +	 * "TEAC Corp." products need a 20ms delay after each
> +	 * class compliant request
> +	 */
> +	if ((le16_to_cpu(dev->descriptor.idVendor) == 0x0644) &&
> +	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
> +		mdelay(20);
> +
>  	/* Marantz/Denon devices with USB DAC functionality need a delay
>  	 * after each class compliant request
>  	 */
> -- 
> 2.7.0.rc3
>