[PPC] Kernel doesn't boot after DRM updates (drm-next-2024-09-19)

[PPC] Kernel doesn't boot after DRM updates (drm-next-2024-09-19)

[Christian Zigotzky]

On 22 September 2024 at 08:48 am, Christian Zigotzky wrote:
> On 21 September 2024 at 06:15 am, Christian Zigotzky wrote:
>> Hi All,
>>
>> The lastest Git kernel doesn't boot anymore after the latest DRM 
>> updates (drm-next-2024-09-19). [1]
>>
>> I tested it with an AMD Radeon HD 6970 (Cayman XT) and with an AMD 
>> Radeon HD 5870 (Cypress XT).
>>
>> I reverted the DRM updates and after that the kernel boots without 
>> any problems.
>>
>> Please note: Due to a lack of time, I can't do a bisect.
>>
>> Please check the latest DRM updates.
>>
>> Thanks,
>> Christian
>>
>>
>> [1] 
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=de848da12f752170c2ebe114804a985314fd5a6a
>>
>>
>>
> I replaced the new Radeon DRM driver from the Git kernel with the 
> Radeon DRM driver from the kernel 6.11. (cp -R 
> linux-6.11/drivers/gpu/drm/radeon a/drivers/gpu/drm/)
>
> It compiles without any problems but unfortunately the kernel doesn't 
> boot either.
>
> Have you tested the new Radeon DRM driver with AMD Radeon graphics cards?
Maybe this is the issue (included in the latest DRM updates - 
drm-next-2024-09-19): 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/arch/powerpc/kernel/nvram_64.c?id=de848da12f752170c2ebe114804a985314fd5a6a

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