From: Macpaul Lin <macpaul.lin@mediatek.com>
To: Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Alexander Tsoy <alexander@tsoy.me>,
Jussi Laako <jussi@sonarnerd.net>,
Nick Kossifidis <mickflemm@gmail.com>,
Dmitry Panchenko <dmitry@d-systems.ee>,
Chris Wulff <crwulff@gmail.com>,
Jesus Ramos <jesus-ramos@live.com>, <alsa-devel@alsa-project.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>
Cc: Mediatek WSD Upstream <wsd_upstream@mediatek.com>,
Macpaul Lin <macpaul.lin@mediatek.com>,
Macpaul Lin <macpaul.lin@gmail.com>, <linux-usb@vger.kernel.org>,
Chihhao Chen <chihhao.chen@mediatek.com>,
<stable@vger.kernel.org>
Subject: [PATCH] sound: usb: quirks: add quirk for Samsung USBC Headset (AKG)
Date: Tue, 23 Jun 2020 19:03:23 +0800 [thread overview]
Message-ID: <1592910203-24035-1-git-send-email-macpaul.lin@mediatek.com> (raw)
We've found Samsung USBC Headset (AKG) (VID: 0x04e8, PID: 0xa051)
need a tiny delay after each class compliant request.
Otherwise the device might not be able to be recognized each times.
Signed-off-by: Chihhao Chen <chihhao.chen@mediatek.com>
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Cc: stable@vger.kernel.org
---
sound/usb/quirks.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index bca0179..ebba29a 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1673,6 +1673,14 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
chip->usb_id == USB_ID(0x0951, 0x16ad)) &&
(requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
usleep_range(1000, 2000);
+
+ /*
+ * Samsung USBC Headset (AKG) need a tiny delay after each
+ * class compliant request. (Model number: AAM625R or AAM627R)
+ */
+ if (chip->usb_id == USB_ID(0x04e8, 0xa051) &&
+ (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
+ usleep_range(5000, 6000);
}
/*
--
1.7.9.5
next reply other threads:[~2020-06-23 11:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 11:03 Macpaul Lin [this message]
2020-06-23 14:14 ` Takashi Iwai
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