linux-kernel - Re: [PATCH] ALSA: usb-audio: Add support for Lenovo ThinkStation P620

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Date:   Mon, 03 Aug 2020 16:41:31 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     tiwai@...e.com, Jaroslav Kysela <perex@...ex.cz>,
        Hui Peng <benquike@...il.com>,
        Andrew Oakley <andrew@...akley.name>,
        Chris Boyle <chris@...le.name>,
        Alexander Tsoy <alexander@...y.me>,
        Dmitry Panchenko <dmitry@...ystems.ee>,
        Gregor Pintar <grpintar@...il.com>,
        Ard van Breemen <ard@...ak.net>,
        Hector Martin <marcan@...can.st>,
        František Kučera 
        <franta-linux@...ntovo.cz>,
        alsa-devel@...a-project.org (moderated list:SOUND),
        linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH] ALSA: usb-audio: Add support for Lenovo ThinkStation P620

On Mon, 03 Aug 2020 16:26:08 +0200,
Kai-Heng Feng wrote:
> 
> Lenovo ThinkStation P620 is like other TRX40 boards, is equipped with
> two USB audio cards.
> 
> USB device (17aa:104d) provides functionality for Internal Speaker and
> Front Headset. It's UAC v2, so it supports insertion control (jack
> detection). However, when trying to get the connector status of the
> speaker, an error occurs:
> [    5.787405] usb 3-1: cannot get connectors status: req = 0x81, wValue = 0x200, wIndex = 0x1000, type = 0
> 
> Since the insertion control works perfectly for the headset, the error
> for speaker is probably casued by connecting internally. So let's relax
> the error for a bit if it's a speaker, and always reports it's connected.
> 
> USB device (17aa:1046) is for rear Line-in, Line-out and Microphone.
> The insertion control works for all three jacks. However, there's an
> Function Unit that doesn't work:
> [    5.905415] usb 3-6: cannot get ctl value: req = 0x83, wValue = 0xc00, wIndex = 0x1300, type = 4
> [    5.905418] usb 3-6: 19:0: cannot get min/max values for control 12 (id 19)
> 
> So turn off the FU to avoid the error.
> 
> Also, add specific card name for both devices, so userspace can easily
> indentify both cards.
> 
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>

Thanks, applied.


Takashi