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Date:   Sat, 12 Aug 2023 18:57:58 +0800
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Subject: Re: Firmware for MT7922 missing in initrd; bluetooth disabled after
 update
To:     Paul Menzel <pmenzel@molgen.mpg.de>,
        =?UTF-8?Q?J=C3=BCrgen_Hofmann?= <hofmann@shiphrah.com>
Cc:     linux-bluetooth@vger.kernel.org, Takashi Iwai <tiwai@suse.com>,
        Chris Lu <chris.lu@mediatek.com>
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On 2023/8/12 17:02, Paul Menzel wrote:
> [Cc: +Qu, +Chris]
> 
> Dear Jürgen,
> 
> 
> Am 10.08.23 um 22:24 schrieb Jürgen Hofmann:
> 
>> I updated openSuse Tumbleweed 20230806 with a bluetooth keyboard 
>> attached to the PC. After the update to 20230808 and rebooting 
>> bluetooth was disabled and it was impossible to enable it again. 
>> Before the update bluetooth was working fine.
> 
> Sorry, I do not know what software versions changed updating to openSUSE 
> Tumbleweed. Could you please mention that for the Linux kernel and BlueZ 
> and the initrd generator?
> 
>> The attached bluetooth keyboard caused the bluetooth module being 
>> added to initrd. However, the corresponding firmware for MT7922 is not 
>> added.
>>
>> dmesg shows:
>>
>> [    4.368031] bluetooth hci0: Direct firmware load for 
>> mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin failed with error -2
>>
>> In fact the file is present on the system
>>
>> ls -l /usr/lib/firmware/mediatek/BT_RAM_CODE*
>> -rw-r--r-- 1 root root 512104  3. Aug 17:36 
>> /usr/lib/firmware/mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin.xz
>> -rw-r--r-- 1 root root 343052  3. Aug 17:36 
>> /usr/lib/firmware/mediatek/BT_RAM_CODE_MT7961_1_2_hdr.bin.xz
>>
>> but missing in initrd
>>
>> lsinitrd | grep BT_RAM_CODE
>> -rw-r--r--   1 root     root       343052 Aug  3 17:36 
>> usr/lib/firmware/mediatek/BT_RAM_CODE_MT7961_1_2_hdr.bin.xz
>>
>> Manually adding the file to initrd makes bluetooth work again.
>>
>> I reported the bug here
>> https://bugzilla.suse.com/show_bug.cgi?id=1214133
>> and was requested to report here.
>>
>> If I can be of any help or you need further information please let me
>> know.
>  From Qu’s answer in the thread *[PATCH v3 1/2] Bluetooth: btusb: Add 
> new VID/PID 0489/e102 for MT7922* [1] it sounds to me, support for chip 
> was only added recently, and is going to be in Linux v6.6.

I think this is a different one.

The new pid (0xe102) is only introduced in some recent laptops (with 
ryzen 7040 series CPUs I guess?).

Unless the user is compiling a custom kernel with the extra vid/pid 
added, it should not work from the very beginning.
Thus I believe it's something different.

Thanks,
Qu
> 
> 
> Kind regards,
> 
> Paul
> 
> 
> [1]: 
> https://lore.kernel.org/linux-bluetooth/8a261418-17ca-405f-b340-7e6634c169bc@suse.com/