[Bug 221952] New: btintel lacks firmware dependencies for several versions

[Bug 221952] New: btintel lacks firmware dependencies for several versions

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=221952

            Bug ID: 221952
           Summary: btintel lacks firmware dependencies for several
                    versions
           Product: Drivers
           Version: 2.5
          Hardware: Intel
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: jarl.gullberg@visar-systems.com
        Regression: No

I have a system with an Intel bluetooth card that requires the
intel/ibt-17-16-1.sfi firmware to properly initialize.

lsusb: Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560
Jefferson Peak 
(JfP)

The firmware is available in the kernel tree and loads fine if it is present on
module load, however, it is not declared as a dependency of btintel in
btintel.c.

This appears to be the case for several other firmware versions as well, with
the only ones listed at time of writing being

MODULE_FIRMWARE("intel/ibt-11-5.sfi");
MODULE_FIRMWARE("intel/ibt-11-5.ddc");
MODULE_FIRMWARE("intel/ibt-12-16.sfi");
MODULE_FIRMWARE("intel/ibt-12-16.ddc");

Ordinarily, this would not be an issue, but I am using mkosi-initrd which
utilizes the embedded firmware metadata for the kernel module to identify which
files it needs to copy into (or retain) in the initrd. Because the firmware
version required by this card is not listed, mkosi-initrd does not include it
in the final initrd. This causes the card to not load properly on boot,
requiring an rmmod/modprobe after the system has fully booted which lets it
load the firmware file from main storage instead of the initrd.

dmesg in the initrd:
[    5.765232] Bluetooth: hci0: Bootloader revision 0.1 build 42 week 52 2015
[    5.766307] Bluetooth: hci0: Device revision is 2
[    5.766315] Bluetooth: hci0: Secure boot is enabled
[    5.766320] Bluetooth: hci0: OTP lock is enabled
[    5.766324] Bluetooth: hci0: API lock is enabled
[    5.766327] Bluetooth: hci0: Debug lock is disabled
[    5.766331] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    5.766367] bluetooth hci0: firmware: failed to load intel/ibt-17-16-1.sfi
(-2)
[    5.766385] bluetooth hci0: firmware: failed to load intel/ibt-17-16-1.sfi
(-2)
[    5.766404] bluetooth hci0: firmware: failed to load intel/ibt-17-16-1.sfi
(-2)
[    5.766411] Bluetooth: hci0: Failed to load Intel firmware file
intel/ibt-17-16-1.sfi (-2)
[    5.767287] Bluetooth: hci0: Reading supported features failed (-56)
[    5.767296] Bluetooth: hci0: Error reading debug features
[    5.767303] Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its
usage is not supported.

dmesg on the host after boot and rmmod/modprobe:
[ 3825.660321] Bluetooth: hci0: Bootloader revision 0.1 build 42 week 52 2015
[ 3825.661260] Bluetooth: hci0: Device revision is 2
[ 3825.661276] Bluetooth: hci0: Secure boot is enabled
[ 3825.661284] Bluetooth: hci0: OTP lock is enabled
[ 3825.661290] Bluetooth: hci0: API lock is enabled
[ 3825.661295] Bluetooth: hci0: Debug lock is disabled
[ 3825.661300] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 3825.665645] Bluetooth: hci0: Found device firmware: intel/ibt-17-16-1.sfi
[ 3825.665743] Bluetooth: hci0: Boot Address: 0x40800
[ 3825.665745] Bluetooth: hci0: Firmware Version: 201-12.24
[ 3827.420681] Bluetooth: hci0: Waiting for firmware download to complete
[ 3827.421351] Bluetooth: hci0: Firmware loaded in 1714560 usecs
[ 3827.421559] Bluetooth: hci0: Waiting for device to boot
[ 3827.435417] Bluetooth: hci0: Device booted in 13654 usecs
[ 3827.435607] Bluetooth: hci0: Found Intel DDC parameters:
intel/ibt-17-16-1.ddc
[ 3827.437363] Bluetooth: hci0: Applying Intel DDC parameters completed
[ 3827.438337] Bluetooth: hci0: Firmware revision 0.1 build 201 week 12 2024
[ 3827.440365] Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its
usage is not supported.

I am not entirely familiar with how the module firmware metadata is used, but I
assume that the lack of entries for this (and other) firmware is not
intentional. In total, there are over 40 versions of the ibt firmware not
listed in btintel.c.

This behaviour was observed on kernel version 6.12.107, but the latest commit
on the kernel is still missing the applicable MODULE_FIRMWARE entries.

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