[PATCH] drm/fbdev-dma: fix getting smem_start

[Thomas Zimmermann]

Hi

Am 11.06.24 um 03:00 schrieb Peng Fan:
>> Subject: Re: [PATCH] drm/fbdev-dma: fix getting smem_start
>>
>> Hi
>>
>> Am 04.06.24 um 10:03 schrieb Peng Fan (OSS):
>>> From: Peng Fan <peng.fan at nxp.com>
>>>
>>> If 'info->screen_buffer' locates in vmalloc address space,
>>> virt_to_page will not be able to get correct results. With
>>> CONFIG_DEBUG_VM and CONFIG_DEBUG_VIRTUAL enabled on ARM64,
>> there is dump below:
>>
>> Which graphics driver triggers this bug?
> It is NXP i.MX95 DPU driver which is still in NXP downstream repo.

Which DRM memory manager does that driver use?

I'm asking because if the driver allocates BOs via vmalloc(), should it 
really use fbdev-dma?

Best regards
Thomas

>
> Thanks,
> Peng.

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
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