linux-kernel - Re: [PATCH v6 00/12] platform/x86: introduce p2sb

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Date:   Wed, 29 Jun 2022 19:39:58 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Lee Jones <lee.jones@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Tony Luck <tony.luck@...el.com>, Wolfram Sang <wsa@...nel.org>,
        Jean Delvare <jdelvare@...e.de>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Henning Schild <henning.schild@...mens.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jonathan Yong <jonathan.yong@...el.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-edac@...r.kernel.org, linux-i2c <linux-i2c@...r.kernel.org>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        LINUXWATCHDOG <linux-watchdog@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        James Morse <james.morse@....com>,
        Robert Richter <rric@...nel.org>,
        Jean Delvare <jdelvare@...e.com>, Pavel Machek <pavel@....cz>,
        Peter Tyser <ptyser@...-inc.com>,
        Andy Shevchenko <andy@...nel.org>,
        Mark Gross <markgross@...nel.org>
Subject: Re: [PATCH v6 00/12] platform/x86: introduce p2sb_bar() helper

+Cc: Rafael

On Tue, Jun 21, 2022 at 02:58:16PM +0300, Andy Shevchenko wrote:
> On Wed, Jun 08, 2022 at 12:50:44PM +0200, Andy Shevchenko wrote:
> > On Wed, Jun 8, 2022 at 9:42 AM Lee Jones <lee.jones@...aro.org> wrote:
> > > On Mon, 06 Jun 2022, Andy Shevchenko wrote:
> > >
> > > > There are a few users that would like to utilize P2SB mechanism of hiding
> > > > and unhiding a device from the PCI configuration space.
> > > >
> > > > Here is the series to consolidate p2sb handling code for existing users
> > > > and to provide a generic way for new comer(s).
> > > >
> > > > It also includes a patch to enable GPIO controllers on Apollo Lake
> > > > when it's used with ABL bootloader w/o ACPI support.
> > > >
> > > > The patch that brings the helper ("platform/x86/intel: Add Primary to
> > > > Sideband (P2SB) bridge support") has a commit message that sheds a light
> > > > on what the P2SB is and why this is needed.
> > > >
> > > > I have tested this on Apollo Lake platform (I'm able to see SPI NOR and
> > > > since we have an ACPI device for GPIO I do not see any attempts to recreate
> > > > one).
> > > >
> > > > The series is ready to be merged via MFD tree, but see below.
> > > >
> > > > The series also includes updates for Simatic IPC drivers that partially
> > > > tagged by respective maintainers (the main question is if Pavel is okay
> > > > with the last three patches, since I believe Hans is okay with removing
> > > > some code under PDx86). Hence the first 8 patches can be merged right
> > > > away and the rest when Pavel does his review.
> > >
> > > Can we just wait for Pavel's review, then merge them all at once?
> > 
> > Sure, it would be the best course of action.
> 
> Pavel, do you have a chance to review the patches (last three) that touch
> LED drivers? What would be your verdict?

Lee, Rafael,

It seems quite hard to get Pavel's attention to this series [1]. It's already
passed more than 3 weeks for any sign of review of three top patches of the
series that touched LED subsystem. The entire series has all necessary tags,
but for LED changes.

Note, that the top of this series is not done by me and was sent for
preliminary review much earlier [2], altogether it makes months of no response from
the maintainer.

The nature of patches is pretty simple and doesn't touch any of other than Simatic LED
drivers nor LED core. Moreover, it was written by Siemens, who produces the H/W in
question and very well tested as a separate change and as part of the series.

I think to move forward we may ask Rafael to review it on behalf of good maintainer
and with his approval apply entire series.

Thoughts?

[1]: https://lore.kernel.org/all/20220606164138.66535-1-andriy.shevchenko@linux.intel.com/
[2]: https://lore.kernel.org/linux-leds/20220513083652.974-1-henning.schild@siemens.com/

-- 
With Best Regards,
Andy Shevchenko