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 <hdegoede@redhat.com>
[Modified to use Link function in WHENCE by Josh Boyer <jwboyer@kernel.org]
Signed-off-by: Josh Boyer <jwboyer@kernel.org>
Driver: BCM-0bb4-0306 Cypress Bluetooth firmware for HTC Vive
File: brcm/BCM-0bb4-0306.hcd
+Link: brcm/BCM-0a5c-6410.hcd -> BCM-0bb4-0306.hcd
Licence: Redistributable. See LICENCE.cypress for details.