Re: [PATCH 05/13] wifi: brcmfmac: Negotiate PCIe mailbox transport with firmware

[Arend van Spriel]

Op 6 november 2026 19:18:32 schreef André Eikmeyer <dev@deq.rocks>:

> On Fri, 06 Nov 2026 18:36:52 +0100
> Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx> wrote:
>
> > Sorry, you lost me there. What is the relation between the patch in
> > this subject and D3 ack.
>
> Hi Arend,
>
> D3_INFORM and D3_ACK are mailbox messages, and 05 changes how they are
> exchanged. Without 05 brcmfmac writes D3_INFORM to the TCM mailbox
> and our cursed Apple 4377 firmware on the 9,1 doesn't read it.
>
> That is why I mentioned the D3 ACK timeout handling patch. I
> submitted that because I was sure the firmware wouldn't send it.
> But actually the transport was broken.
>
> https://lore.kernel.org/all/20261001085308.1688049-1-dev@deq.rocks/
>
> which was superseded by Sebastian's patch here:
>
> https://lore.kernel.org/linux-wireless/20260915-brcmfmac-bcm43752-suspend-fix-v2-1-1bd84914998b@xxxxxxxxxxxxx/
>
> So probably for addressing Sebastian's issue this needs to stay
> anyways. My memory served me wrong. I just read that his device is not
> an Apple product, but his patch incidentally worked around the same
> problem. Sorry if i was causing unneccessary noise.

No problem. Thanks for helping me unclutter my head.

Regards,
Arend
>