linux-kernel - [PATCH 3.13.y-ckt 103/121] ALSA: usb-audio: Add ctrl message delay quirk for Marantz/Denon devices

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Message-Id: <1417548000-1794-104-git-send-email-kamal@canonical.com>
Date:	Tue,  2 Dec 2014 11:19:42 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Jurgen Kramer <gtmkramer@...all.nl>, Takashi Iwai <tiwai@...e.de>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 103/121] ALSA: usb-audio: Add ctrl message delay quirk for Marantz/Denon devices

3.13.11-ckt12 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jurgen Kramer <gtmkramer@...all.nl>

commit 6e84a8d7ac3ba246ef44e313e92bc16a1da1b04a upstream.

This patch adds a USB control message delay quirk for a few specific Marantz/Denon
devices. Without the delay the DACs will not work properly and produces the
following type of messages:

Nov 15 10:09:21 orwell kernel: [   91.342880] usb 3-13: clock source 41 is not valid, cannot use
Nov 15 10:09:21 orwell kernel: [   91.343775] usb 3-13: clock source 41 is not valid, cannot use

There are likely other Marantz/Denon devices using the same USB module which exhibit the
same problems. But as this cannot be verified I limited the patch to the devices
I could test.

The following two devices are covered by this path:
- Marantz SA-14S1
- Marantz HD-DAC1

Signed-off-by: Jurgen Kramer <gtmkramer@...all.nl>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 sound/usb/quirks.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 0df9ede..3fbb455 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1127,6 +1127,20 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
 	if ((le16_to_cpu(dev->descriptor.idVendor) == 0x23ba) &&
 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
 		mdelay(20);
+
+	/* Marantz/Denon devices with USB DAC functionality need a delay
+	 * after each class compliant request
+	 */
+	if ((le16_to_cpu(dev->descriptor.idVendor) == 0x154e) &&
+	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) {
+
+		switch (le16_to_cpu(dev->descriptor.idProduct)) {
+		case 0x3005: /* Marantz HD-DAC1 */
+		case 0x3006: /* Marantz SA-14S1 */
+			mdelay(20);
+			break;
+		}
+	}
 }
 
 /*
-- 
1.9.1

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