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From: Hans de Goede <>
To: Josh Boyer <>
Cc: Linux Firmware <>
Subject: Re: [PATCH] Add symlink for Dell XPS 15 9550 Broadcom Bluetooth patch-ram file
Date: Tue, 21 Apr 2020 09:46:31 +0200
Message-ID: <> (raw)
In-Reply-To: <>


On 4/21/20 12:31 AM, Josh Boyer wrote:
> On Fri, Apr 17, 2020 at 12:20 PM Hans de Goede <> wrote:
>> The linux-firmware repo does not contain many Broadcom (now Cypress)
>> Bluetooth patch-ram files, because we have never been able to get
>> permission to re-distribute those.
>> We do have one file for the for HTC Vive, which was submitted by HTC
>> themselves with permission from Cypress.
>> That file contain a "BCM20703A1 Generic USB 20Mhz fcbga_BU" patch-ram
>> build. The patch-ram files used by Windows for the Bluetooth module
>> in the XPS 15 9550, USB-id 0a5c:6410 is also a "BCM20703A1 Generic
>> USB 20Mhz fcbga_BU" patch-ram build. Since the build-parameters
>> (crystal MHz, package/module type used) between the 2 builds are an
>> exact match we can also use the HTC submitted patch-ram for the
>> XPS 15 9550. So lets add a symlink for this.
>> This will make the Bluetooth on the XPS 15 9550 work out of the box,
>> when linux-firmware is installed, without the user needing to go and
>> find a suitable patch-ram file themselves.
>> This has been tested on a XPS 15 9550 with both Bluetooth HID and
>> Bluetooth audio devices.
>> Signed-off-by: Hans de Goede <>
>> ---
>>   WHENCE                 | 1 +
>>   brcm/BCM-0a5c-6410.hcd | 1 +
>>   2 files changed, 2 insertions(+)
>>   create mode 120000 brcm/BCM-0a5c-6410.hcd
> It should be possible to do this by simply using the Link directive in
> the WHENCE file.  That will create the symlink at installation time.
> It's a fairly recent enhancement.  I'll look at it tomorrow and adjust
> if so.

Nice, that would indeed be an improvement as in the past make install
turned the symlinks into file copies IIRC.

Perhaps you can also convert the brcm/brcmfmac43362-sdio.lemaker,bananapro.txt
symlink to use this new method?

Thank you for taking care of adjusting the patch.



  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-17 16:20 Hans de Goede
2020-04-20 22:31 ` Josh Boyer
2020-04-21  7:46   ` Hans de Goede [this message]
2020-04-21 11:47     ` Josh Boyer

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