This is a note to let you know that I've just added the patch titled
ALSA: usb-audio: Fix TEAC UD-501/UD-503/NT-503 usb delay
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-usb-audio-fix-teac-ud-501-ud-503-nt-503-usb-delay.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5a4ff9ec8d6edd2ab1cfe8ce6a080d6e57cbea9a Mon Sep 17 00:00:00 2001
From: Guillaume Fougnies <guillaume@xxxxxxxxxxxx>
Date: Tue, 26 Jan 2016 00:28:27 +0100
Subject: ALSA: usb-audio: Fix TEAC UD-501/UD-503/NT-503 usb delay
From: Guillaume Fougnies <guillaume@xxxxxxxxxxxx>
commit 5a4ff9ec8d6edd2ab1cfe8ce6a080d6e57cbea9a upstream.
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@xxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/usb/quirks.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1128,8 +1128,12 @@ void snd_usb_set_interface_quirk(struct
* "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,
@@ -1144,6 +1148,14 @@ void snd_usb_ctl_msg_quirk(struct usb_de
(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
*/
Patches currently in stable-queue which might be from guillaume@xxxxxxxxxxxx are
queue-3.14/alsa-usb-audio-fix-teac-ud-501-ud-503-nt-503-usb-delay.patch
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