From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Mon, 17 Feb 2020 11:56:50 +0000 (+0100)
Subject: 4.9-stable patches
X-Git-Tag: v4.19.105~35
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=92105e8877d33188071e0904a5adcd3f853840a3;p=thirdparty%2Fkernel%2Fstable-queue.git

4.9-stable patches

added patches:
	alsa-usb-audio-apply-sample-rate-quirk-for-audioengine-d1.patch
---

diff --git a/queue-4.9/alsa-usb-audio-apply-sample-rate-quirk-for-audioengine-d1.patch b/queue-4.9/alsa-usb-audio-apply-sample-rate-quirk-for-audioengine-d1.patch
new file mode 100644
index 00000000000..4891a209a91
--- /dev/null
+++ b/queue-4.9/alsa-usb-audio-apply-sample-rate-quirk-for-audioengine-d1.patch
@@ -0,0 +1,47 @@
+From 93f9d1a4ac5930654c17412e3911b46ece73755a Mon Sep 17 00:00:00 2001
+From: Arvind Sankar <nivedita@alum.mit.edu>
+Date: Tue, 11 Feb 2020 11:22:35 -0500
+Subject: ALSA: usb-audio: Apply sample rate quirk for Audioengine D1
+
+From: Arvind Sankar <nivedita@alum.mit.edu>
+
+commit 93f9d1a4ac5930654c17412e3911b46ece73755a upstream.
+
+The Audioengine D1 (0x2912:0x30c8) does support reading the sample rate,
+but it returns the rate in byte-reversed order.
+
+When setting sampling rate, the driver produces these warning messages:
+[168840.944226] usb 3-2.2: current rate 4500480 is different from the runtime rate 44100
+[168854.930414] usb 3-2.2: current rate 8436480 is different from the runtime rate 48000
+[168905.185825] usb 3-2.1.2: current rate 30465 is different from the runtime rate 96000
+
+As can be seen from the hexadecimal conversion, the current rate read
+back is byte-reversed from the rate that was set.
+
+44100 == 0x00ac44, 4500480 == 0x44ac00
+48000 == 0x00bb80, 8436480 == 0x80bb00
+96000 == 0x017700,   30465 == 0x007701
+
+Rather than implementing a new quirk to reverse the order, just skip
+checking the rate to avoid spamming the log.
+
+Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
+Cc: <stable@vger.kernel.org>
+Link: https://lore.kernel.org/r/20200211162235.1639889-1-nivedita@alum.mit.edu
+Signed-off-by: Takashi Iwai <tiwai@suse.de>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ sound/usb/quirks.c |    1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/sound/usb/quirks.c
++++ b/sound/usb/quirks.c
+@@ -1149,6 +1149,7 @@ bool snd_usb_get_sample_rate_quirk(struc
+ 	case USB_ID(0x1de7, 0x0014): /* Phoenix Audio TMX320 */
+ 	case USB_ID(0x1de7, 0x0114): /* Phoenix Audio MT202pcs */
+ 	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
++	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
+ 		return true;
+ 	}
+ 	return false;