linux-kernel - [PATCH 5.14.y 1/2] ALSA: usb-audio: Add Schiit Hel device to mixer map quirk table

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Date:   Thu,  4 Nov 2021 12:23:08 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 5.14.y 1/2] ALSA: usb-audio: Add Schiit Hel device to mixer map quirk table

commit 22390ce786c59328ccd13c329959dee1e8757487 upstream.

This is a fix equivalent with the upstream commit 22390ce786c5 ("ALSA:
usb-audio: add Schiit Hel device to quirk table"), adapted to the
earlier kernels up to 5.14.y.  It adds the quirk entry with the old
ignore_ctl_error flag to the usbmix_ctl_maps, instead.

The original patch description says:
    The Shciit Hel device responds to the ctl message for the mic capture
    switch with a timeout of -EPIPE:

            usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
            usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
            usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
            usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1

    This seems safe to ignore as the device works properly with the control
    message quirk, so add it to the quirk table so all is good.

Signed-off-by: Takashi Iwai <tiwai@...e.de>
---
 sound/usb/mixer_maps.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index c5794e83fd80..809ac6d18d2b 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -538,6 +538,10 @@ static const struct usbmix_ctl_map usbmix_ctl_maps[] = {
 		.id = USB_ID(0x25c4, 0x0003),
 		.map = scms_usb3318_map,
 	},
+	{
+		.id = USB_ID(0x30be, 0x0101), /*  Schiit Hel */
+		.ignore_ctl_error = 1,
+	},
 	{
 		/* Bose Companion 5 */
 		.id = USB_ID(0x05a7, 0x1020),
-- 
2.31.1