Status of dma-range issues with BCM2711

Antoine Mazeas antoine at
Mon Jan 9 13:16:36 CET 2023

Dear all,

Last time Peter tested this patch, he raised the issue of also copying the CMA range of set by the firmware, this task being still outstanding today.

I’m happy to resume refining this patch accordingly, unless it could be shipped without the outstanding task.

For reference

(Yes this present patch is a resend when it shouldn’t have been and that’s my bad)

Peter, what’s your opinion?


> Le 9 janv. 2023 à 12:30, Stefan Wahren <stefan.wahren at> a écrit :
> Hi,
>> Am 09.01.23 um 08:55 schrieb Jian-Hong Pan:
>> Stefan Wahren <stefan.wahren at> 於 2023年1月8日 週日 下午8:01寫道:
>>> Hi,
>>> there has been some attempts to fix the booting issues of newer
>>> Raspberry Pi 4 (BCM2711 C0) [1] [2]. Since none of them has been applied
>>> yet, i wanted to know the status of this?
>>> Best regards
>>> [1] -
>> Endless OS chooses this patch series into downstream u-boot.  It boots
>> up Endless OS system on RPi 400 correctly.
> okay, let me rephrase my question: why haven't any of these patches been applied upstream? E.g. Arch Linux uses upstream U-Boot and periodically gets bug report about this issue.
>> Jian-Hong Pan

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