Re: QCA6390 broken in current kernel

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On Thu, 1 Aug 2024 at 10:36, Wren Turkal <wt@xxxxxxxxxxxxxxxx> wrote:
>
> On 8/1/24 1:09 AM, Bartosz Golaszewski wrote:
> > On Thu, 1 Aug 2024 at 09:59, Wren Turkal <wt@xxxxxxxxxxxxxxxx> wrote:
> >>>
> >>> Indeed. I don't know why I assumed it must be an ARM laptop. I will
> >>> come up with a fix shortly.
> >>
> >> I have a question, does this fact have anything to do with the problem
> >> with failing to initialize the QCA6390 BT hardware on my laptop after a
> >> warm reboot? As I didn't understand the connection to DT in that other
> >> issue, does this fact change anything about how to approach that issue?
> >> I only ask because that issue still very much exists.
> >>
> >
> > Can you remind me if you had bisected it to a specific offending commit?
>
> I don't think I was able to fully bisect that one. I was more focused on
> the fact that the BT hardware didn't work at all even after a cold boot
> in that previous issue.
>
> Zijun suggested a fix in
> https://lore.kernel.org/linux-bluetooth/1715866294-1549-1-git-send-email-quic_zijuhu@xxxxxxxxxxx/.
>
> That fix was landed (mainline commit
> 88e72239ead9814b886db54fc4ee39ef3c2b8f26) and reverted for regression
> (revert part of merge 033771c085c2ed73cb29dd25e1ec8c4b2991cad9).
>
> I do not know how to move that one forward. I was hoping that this
> pwrseq work and the fact that this laptop doesn't use DT might be new
> facts that make it easier to move forward.
>

With the fixes from this series the driver should theoretically go
back to the behavior pre-pwrseq on your hardware. Is there a specific
kernel version where it still works?

Bart




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