linux-kernel - Re: [PATCH v2 00/16] intel-lpss: support non-ACPI platforms

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Message-ID: <6535017.eZvpZdlbGL@vostro.rjw.lan>
Date:	Fri, 08 Jan 2016 01:03:52 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Laura Abbott <labbott@...hat.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	linux-i2c@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Kevin Fenzi <kevin@...ye.com>, Arnd Bergmann <arnd@...db.de>,
	Wolfram Sang <wsa@...-dreams.de>,
	Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH v2 00/16] intel-lpss: support non-ACPI platforms

On Wednesday, January 06, 2016 08:19:49 AM Laura Abbott wrote:
> On 01/05/2016 03:59 PM, Rafael J. Wysocki wrote:
> > On Tuesday, January 05, 2016 09:57:35 AM Laura Abbott wrote:
> >> On 12/06/2015 05:44 PM, Rafael J. Wysocki wrote:
> >>> On Monday, November 30, 2015 05:11:28 PM Andy Shevchenko wrote:
> >>>> This series includes few logical sets that bring a support of non-ACPI
> >>>> platforms for Intel Skylake.
> >>>>
> >>>> First part is a refactoring of built-in device properties support:
> >>>> - keep single value inside the structure
> >>>> - provide helper macros to define built-in properties
> >>>> - fall back to secondary fwnode if primary has no asked property
> >>>>
> >>>> Second is a propagating built-in device properties in platform core.
> >>>>
> >>>> Third one is modifications to MFD code and intel-lpss.c driver in particular
> >>>> to define and pass built-in properties to the individual drivers.
> >>>>
> >>>> And last part is a fix for I2C bug found on Lenovo Yoga hardware and a first
> >>>> converted user.
> >>>>
> >>>> Built-in device properties is an alternative to platform data. It provides a
> >>>> unified API that drivers can use to cover all cases at once: DT, ACPI, and
> >>>> built-in properties.
> >>>>
> >>>> With this series applied a platform data can be considered obsolete. Moreover,
> >>>> built-in device properties allow to adjust the existing configuration, for
> >>>> example, in cases when ACPI values are wrong on some platforms.
> >>>>
> >>>> The series has been tested on available hardware and doesn't break current
> >>>> behaviour. But we ask people who have the affected hardware to apply the series
> >>>> on your side and check with Lenovo hardware.
> >>>>
> >>>> Changelog v2:
> >>>> - fix isuues found by kbuild bot (kbuild)
> >>>> - append a patch to propagate device properties in polatform code (Arnd)
> >>>> - update few existing and add couple of new patches due to above
> >>>> - check with kmemleak
> >>>>
> >>>> Andy Shevchenko (9):
> >>>>     device property: always check for fwnode type
> >>>>     device property: rename helper functions
> >>>>     device property: refactor built-in properties support
> >>>>     device property: keep single value inplace
> >>>>     device property: improve readability of macros
> >>>>     device property: return -EINVAL when property isn't found in ACPI
> >>>>     device property: Fallback to secondary fwnode if primary misses the
> >>>>       property
> >>>>     mfd: core: propagate device properties to sub devices drivers
> >>>>     mfd: intel-lpss: Pass HSUART configuration via properties
> >>>>
> >>>> Heikki Krogerus (1):
> >>>>     device property: helper macros for property entry creation
> >>>>
> >>>> Mika Westerberg (6):
> >>>>     device property: Take a copy of the property set
> >>>>     driver core: platform: Add support for built-in device properties
> >>>>     driver core: Do not overwrite secondary fwnode with NULL if it is set
> >>>>     mfd: intel-lpss: Add support for passing device properties
> >>>>     mfd: intel-lpss: Pass SDA hold time to I2C host controller driver
> >>>>     i2c: designware: Convert to use unified device property API
> >>>
> >>> I'm going to queue up this series for v4.5.
> >>>
> >>> If there are any problems with it or objections from anyone, please let me know.
> >>>
> >>
> >>
> >> Raising an old thread, I pulled this series into Fedora rawhide and
> >> while it worked for Lenovo Yoga we received a report that it caused
> >> a regression on the Dell Inspiron 7559 (see
> >> https://bugzilla.redhat.com/show_bug.cgi?id=1275718#c27) . I haven't
> >> asked the reporter about bisecting to see which patch broke it.
> >> Were there any known follow up patches?
> >
> > There were a few.
> >
> > All of them are in my linux-next branch if you can try this one.
> >
> > Alternatively, I can expose a branch with these to you to test.
> >
> 
> I picked up all the patches from the device-properties merge but the
> problem still shows up. Are there others I should pick up? Hardware
> details about the touchpad are at https://bugzilla.redhat.com/show_bug.cgi?id=1275718#c34

Well, in that case can you please ask the reporter to bisect?

Rafael