From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Linux ACPI <linux-acpi@vger.kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>,
x86 Maintainers <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Bjorn Helgaas <helgaas@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Len Brown <len.brown@intel.com>
Subject: Re: [PATCH v1 1/5] PCI: PM: x86: Drop Intel MID PCI PM support
Date: Tue, 21 Sep 2021 15:16:17 +0300 [thread overview]
Message-ID: <CAHp75VdE3gNXy+p=8iyqyY0Ja+AHjv6zFEGwWJSXQwz+A0X1TQ@mail.gmail.com> (raw)
In-Reply-To: <CAJZ5v0iRviZkLzRP0t2f4q5oY9y6CxRotDnyBVBt-QBt-uYReQ@mail.gmail.com>
On Mon, Sep 20, 2021 at 1:57 PM Rafael J. Wysocki <rafael@kernel.org> wrote:
> On Sun, Sep 19, 2021 at 10:32 PM Andy Shevchenko
> <andy.shevchenko@gmail.com> wrote:
> > On Sun, Sep 19, 2021 at 9:01 AM Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
...
> > > I am going to post patches removing the rest of MID support from arch/x86/
> > > and elsewhere, but that is still quite a bit of stuff and I don't want this
> > > simple PCI PM series to depend on that work.
> >
> > This is still being used by MID with ACPI assisted (*) support.
> > Hence, not ack.
> >
> > *) ACPI layer is provided by U-Boot and can't fulfill all possible
> > features that ACPI may use in the Linux kernel.
>
> OK, good to know.
>
> I'm not sure how this PCI PM stuff works with ACPI.
It doesn't that is the point. The PCI is very interesting there and
what I meant is that the ACPI implementation I have provided via
U-Boot does not cover these. If you have any hints/ideas how it may be
handled, I am all ears!
> It looks like
> this relies on a specific ordering of arch_initcall() calls for
> correctness which is sort of fragile.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-09-21 12:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8003272.NyiUUSuA9g@kreacher>
2021-09-18 13:21 ` [PATCH v1 1/5] PCI: PM: x86: Drop Intel MID PCI PM support Rafael J. Wysocki
2021-09-19 20:31 ` Andy Shevchenko
2021-09-20 10:57 ` Rafael J. Wysocki
2021-09-21 12:16 ` Andy Shevchenko [this message]
2021-09-21 14:23 ` Rafael J. Wysocki
2021-09-19 21:11 ` Ferry Toth
2021-09-20 10:58 ` Rafael J. Wysocki
2021-09-18 13:23 ` [PATCH v1 2/5] PCI: ACPI: PM: Do not use pci_platform_pm_ops for ACPI Rafael J. Wysocki
2021-09-18 13:24 ` [PATCH v1 3/5] PCI: PM: Rearrange code in pci_target_state() Rafael J. Wysocki
2021-09-18 13:26 ` [PATCH v1 4/5] PCI: PM: Make pci_choose_state() call pci_target_state() Rafael J. Wysocki
2021-09-18 13:27 ` [PATCH v1 5/5] PCI: PM: ACPI: Drop unnecessary acpi_pci_power_manageable() calls Rafael J. Wysocki
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