linux-kernel - Re: Atheros 1525/QCA6174 BT issue

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Date:   Thu, 8 Mar 2018 10:06:51 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Linux Bluetooth mailing list 
        <linux-bluetooth@...r.kernel.org>, linux-kernel@...r.kernel.org
Subject: Re: Atheros 1525/QCA6174 BT issue

Hi Takashi,

> we've got a but report about the broken Atheros BT on the recent
> kernels:
>  http://bugzilla.opensuse.org/show_bug.cgi?id=1082504
> 
> In short, btusb can't load the patch ar3k/AthrBT_0x00000200.dfu, and
> this could be worked around by the patch to move 0cf3:3004 blacklist
> entry to use BTUSB_QCA_ROM instead of BTUSB_ATH3012.
> 
> And this looks like a long-standing problem, at least for over two
> years.  Many web pages suggest the same patch, but it's never merged
> to upstream.
> 
> So this made me wonder what's going on.  I see that the BTUSB_ATH3012
> quirk was originally introduced just for this chip id (0cf3:3004).
> Is it a different variant from the original chip that causes a
> problem?

not all patches from distro kernel are sent upstream. I have not heard of this specific issues, but happy to accept patches to get it fixed.

Regards

Marcel