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

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Date:	Fri, 8 Jan 2016 09:08:08 -0800
From:	Laura Abbott <labbott@...hat.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
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 01/07/2016 04:03 PM, Rafael J. Wysocki wrote:
> 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
>

I'll see if I can help the reporter bisect although it looks like Hans
has an idea about what might be failing.

Thanks,
Laura