On Wed, 24 Apr 2024 at 15:49, Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:
>
> Hi Wren,
>
> On Wed, Apr 24, 2024 at 1:04 AM Wren Turkal <wt@xxxxxxxxxxxxxxxx> wrote:
> >
> > On 4/23/24 9:31 PM, Krzysztof Kozlowski wrote:
> > > On 24/04/2024 06:18, quic_zijuhu wrote:
> > >> On 4/24/2024 12:10 PM, Krzysztof Kozlowski wrote:
> > >>> On 24/04/2024 06:07, quic_zijuhu wrote:
> > >>>> On 4/24/2024 12:06 PM, Krzysztof Kozlowski wrote:
> > >>>>> On 24/04/2024 02:46, Zijun Hu wrote:
> > >>>>>> Commit 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL()
> > >>>>>> with gpiod_get_optional()") will cause below serious regression issue:
> > >>>>>>
> > >>>>>> BT can't be enabled any more after below steps:
> > >>>>>> cold boot -> enable BT -> disable BT -> BT enable failure
> > >>>>>> if property enable-gpios is not configured within DT|ACPI for QCA6390.
> > >>>>>>
> > >>>>>> The commit wrongly changes flag @power_ctrl_enabled set logic for this
> > >>>>>> case as shown by its below code applet and causes this serious issue.
> > >>>>>> qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
> > >>>>>> GPIOD_OUT_LOW);
> > >>>>>> - if (IS_ERR_OR_NULL(qcadev->bt_en)) {
> > >>>>>> + if (IS_ERR(qcadev->bt_en)) {
> > >>>>>> dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
> > >>>>>> power_ctrl_enabled = false;
> > >>>>>> }
> > >>>>>>
> > >>>>>> Fixed by reverting the mentioned commit for QCA6390.
> > >>>>>>
> > >>>>>> Fixes: 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()")
> > >>>>>> Reported-by: Wren Turkal <wt@xxxxxxxxxxxxxxxx>
> > >>>>>> Link: https://bugzilla.kernel.org/show_bug.cgi?id=218726
> > >>>>>> Link: https://lore.kernel.org/linux-bluetooth/ea20bb9b-6b60-47fc-ae42-5eed918ad7b4@xxxxxxxxxxx/T/#m73d6a71d2f454bb03588c66f3ef7912274d37c6f
> > >>>>>> Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
> > >>>>>> Tested-by: Wren Turkal <wt@xxxxxxxxxxxxxxxx>
> > >>>>>
> > >>>>> No, Bartosz' patch should go.
> > >>>>>
> > >>>> what is Bartosz' patch.
> > >>>
> > >>> Srsly? You were Cc'ed on it. How many upstream patches on upstream
> > >>> mailing lists do you receive that you lost track of them?
> > >>>
> > >> Bartosz' patch have basic serious mistook and logic error and have no
> > >> any help for QCA6390, and it is not suitable regarding DTS usage.
> > >
> > > Really? Why you did not respond with comments then? Considering how
> > > imprecise and vague you are in describing real issues, I have doubts in
> > > your judgment here as well.
> >
> > Please slow down here. Zijun's patch works and Bartosz's patch does not.
> > I don't think Zijun means any ill intent. I am replying to Bartosz's
> > patch right now.
>
> Ok, that is great feedback, so I might be picking up the Zijun v7 set
> if we don't find any major problems with it.
>
Luiz,
Please consider my alternative[1] also tested by Wren. Zijun's usage
of GPIO API is wrong.
Bart
[1] https://lore.kernel.org/linux-bluetooth/CAMRc=MfJ1v3pAB+Wvu1ahJAUvDfk3OsN5nieA-EYgTXPwMzqyg@xxxxxxxxxxxxxx/T/#mbf94795476d21df0a24441470ce02def9d2970a7
