Re: [PATCH 0/7] Move dell-led to drivers/platform/x86

Re: [PATCH 0/7] Move dell-led to drivers/platform/x86

[Michał Kępień]

> On 12 December 2016 at 01:13, <Mario.Limonciello@dell.com> wrote:
> 
> > add Anthony Wong @ Canonical.
> >
> > I'm about to go on break and won't have access to hardware for a while.
> >
> > Anthony,
> >
> > Your team has this hardware more readily available than I do. Would you be
> > able to have someone on the team verify this series?
> >
> Sorry, just back from vacation.
> 
> Yes, we can test it here some time next week.

That is great news, thanks!  I will try to post a v2 of this patch
series within the next few days, so hopefully it will be ready before
you get around to testing.  I will keep you in the loop.

-- 
Best regards,
Michał Kępień

[PATCH 0/7] Move dell-led to drivers/platform/x86

[Michał Kępień]

This patch series moves the dell-led driver from the LED subsystem to
the x86 platform driver subsystem.  I decided to also CC the sound
subsystem contacts for the whole series as
sound/pci/hda/dell_wmi_helper.c is also affected.

The original motivation behind this effort was to move all code using
the dell-smbios module to the x86 platform driver subsystem.  While I
was investigating the possibilites to do that, it quickly emerged that
dell-led can and in fact should be moved to the x86 platform driver
subsystem in its entirety.

dell-led consists of two major parts:

  - the part exposing a microphone mute LED interface, introduced in
    db6d8cc ("dell-led: add mic mute led interface"); this interface is
    used by sound/pci/hda/dell_wmi_helper.c; while the original
    implementation used a WMI interface, it was changed to use
    dell-smbios in cf0d7ea ("dell-led: use dell_smbios_find_token() for
    finding mic DMI tokens") and 0c41a08 ("dell-led: use
    dell_smbios_send_request() for performing SMBIOS calls"),

  - the part handling an activity LED present in Dell Latitude 2100
    netbooks, introduced in 72dcd8d ("leds: Add Dell Business Class
    Netbook LED driver"); it binds to a specific WMI GUID and then
    registers a LED device which is controlled using WMI (i.e. it is
    basically a WMI driver).

Patches 1-4 clean up the microphone mute LED interface to minimize the
amount of code moved around.
  
Patch 5 moves the microphone mute LED interface to
drivers/platform/x86/dell-laptop.c, effectively causing
sound/pci/hda/dell_wmi_helper.c to depend on CONFIG_DELL_LAPTOP instead
of CONFIG_LEDS_DELL_NETBOOKS.
    
Patch 6 reverts dell-led to the state it was in after its initial commit
72dcd8d ("leds: Add Dell Business Class Netbook LED driver") by removing
all remnants of the microphone mute LED handling code.

Patch 7 moves all that is left of dell-led (i.e. the activity LED part,
as originally implemented), to a new module which is placed in
drivers/platform/x86/dell-wmi-led.c.

This patch series is based on linux-leds/for-4.11 as the LED subsystem
is affected by all patches except patch 3.

If anyone reading this has access to a Dell device which has an activity
LED and/or a microphone mute LED currently supported by dell-led, I
would love to hear from you as I do not have the hardware needed to
practically test this patch series.

 drivers/leds/Kconfig                               |  9 ---
 drivers/leds/Makefile                              |  1 -
 drivers/platform/x86/Kconfig                       |  8 +++
 drivers/platform/x86/Makefile                      |  1 +
 drivers/platform/x86/dell-laptop.c                 | 28 ++++++++
 .../dell-led.c => platform/x86/dell-wmi-led.c}     | 75 +++-------------------
 include/linux/dell-led.h                           |  6 +-
 sound/pci/hda/dell_wmi_helper.c                    | 18 +++---
 8 files changed, 55 insertions(+), 91 deletions(-)
 rename drivers/{leds/dell-led.c => platform/x86/dell-wmi-led.c} (73%)

-- 
2.10.2

Re: [PATCH 0/7] Move dell-led to drivers/platform/x86

[Jacek Anaszewski]

Hi Michał,

Thanks for the patch set.

On 12/08/2016 01:36 PM, Michał Kępień wrote:
> This patch series moves the dell-led driver from the LED subsystem to
> the x86 platform driver subsystem.  I decided to also CC the sound
> subsystem contacts for the whole series as
> sound/pci/hda/dell_wmi_helper.c is also affected.
>
> The original motivation behind this effort was to move all code using
> the dell-smbios module to the x86 platform driver subsystem.  While I
> was investigating the possibilites to do that, it quickly emerged that
> dell-led can and in fact should be moved to the x86 platform driver
> subsystem in its entirety.
>
> dell-led consists of two major parts:
>
>   - the part exposing a microphone mute LED interface, introduced in
>     db6d8cc ("dell-led: add mic mute led interface"); this interface is
>     used by sound/pci/hda/dell_wmi_helper.c; while the original
>     implementation used a WMI interface, it was changed to use
>     dell-smbios in cf0d7ea ("dell-led: use dell_smbios_find_token() for
>     finding mic DMI tokens") and 0c41a08 ("dell-led: use
>     dell_smbios_send_request() for performing SMBIOS calls"),
>
>   - the part handling an activity LED present in Dell Latitude 2100
>     netbooks, introduced in 72dcd8d ("leds: Add Dell Business Class
>     Netbook LED driver"); it binds to a specific WMI GUID and then
>     registers a LED device which is controlled using WMI (i.e. it is
>     basically a WMI driver).
>
> Patches 1-4 clean up the microphone mute LED interface to minimize the
> amount of code moved around.
>
> Patch 5 moves the microphone mute LED interface to
> drivers/platform/x86/dell-laptop.c, effectively causing
> sound/pci/hda/dell_wmi_helper.c to depend on CONFIG_DELL_LAPTOP instead
> of CONFIG_LEDS_DELL_NETBOOKS.
>
> Patch 6 reverts dell-led to the state it was in after its initial commit
> 72dcd8d ("leds: Add Dell Business Class Netbook LED driver") by removing
> all remnants of the microphone mute LED handling code.
>
> Patch 7 moves all that is left of dell-led (i.e. the activity LED part,
> as originally implemented), to a new module which is placed in
> drivers/platform/x86/dell-wmi-led.c.
>
> This patch series is based on linux-leds/for-4.11 as the LED subsystem
> is affected by all patches except patch 3.
>
> If anyone reading this has access to a Dell device which has an activity
> LED and/or a microphone mute LED currently supported by dell-led, I
> would love to hear from you as I do not have the hardware needed to
> practically test this patch series.

I think that it is necessary to find someone who will give their
Tested-by.

What I can accept immediately is moving the driver in the current
shape to x86 platform drivers. I could expose a stable branch with
that patch for the x86 platform maintainers then.

>  drivers/leds/Kconfig                               |  9 ---
>  drivers/leds/Makefile                              |  1 -
>  drivers/platform/x86/Kconfig                       |  8 +++
>  drivers/platform/x86/Makefile                      |  1 +
>  drivers/platform/x86/dell-laptop.c                 | 28 ++++++++
>  .../dell-led.c => platform/x86/dell-wmi-led.c}     | 75 +++-------------------
>  include/linux/dell-led.h                           |  6 +-
>  sound/pci/hda/dell_wmi_helper.c                    | 18 +++---
>  8 files changed, 55 insertions(+), 91 deletions(-)
>  rename drivers/{leds/dell-led.c => platform/x86/dell-wmi-led.c} (73%)
>


-- 
Best regards,
Jacek Anaszewski

Re: [PATCH 0/7] Move dell-led to drivers/platform/x86

[Pali Rohár]

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On Thursday 08 December 2016 15:26:37 Jacek Anaszewski wrote:
> Hi Michał,
> 
> Thanks for the patch set.
> 
> On 12/08/2016 01:36 PM, Michał Kępień wrote:
> > This patch series moves the dell-led driver from the LED subsystem
> > to the x86 platform driver subsystem.  I decided to also CC the
> > sound subsystem contacts for the whole series as
> > sound/pci/hda/dell_wmi_helper.c is also affected.
> > 
> > The original motivation behind this effort was to move all code
> > using the dell-smbios module to the x86 platform driver subsystem.
> >  While I was investigating the possibilites to do that, it quickly
> > emerged that dell-led can and in fact should be moved to the x86
> > platform driver subsystem in its entirety.
> > 
> > dell-led consists of two major parts:
> >   - the part exposing a microphone mute LED interface, introduced
> >   in
> >   
> >     db6d8cc ("dell-led: add mic mute led interface"); this
> >     interface is used by sound/pci/hda/dell_wmi_helper.c; while
> >     the original implementation used a WMI interface, it was
> >     changed to use dell-smbios in cf0d7ea ("dell-led: use
> >     dell_smbios_find_token() for finding mic DMI tokens") and
> >     0c41a08 ("dell-led: use
> >     dell_smbios_send_request() for performing SMBIOS calls"),
> >   
> >   - the part handling an activity LED present in Dell Latitude 2100
> >   
> >     netbooks, introduced in 72dcd8d ("leds: Add Dell Business Class
> >     Netbook LED driver"); it binds to a specific WMI GUID and then
> >     registers a LED device which is controlled using WMI (i.e. it
> >     is basically a WMI driver).
> > 
> > Patches 1-4 clean up the microphone mute LED interface to minimize
> > the amount of code moved around.
> > 
> > Patch 5 moves the microphone mute LED interface to
> > drivers/platform/x86/dell-laptop.c, effectively causing
> > sound/pci/hda/dell_wmi_helper.c to depend on CONFIG_DELL_LAPTOP
> > instead of CONFIG_LEDS_DELL_NETBOOKS.
> > 
> > Patch 6 reverts dell-led to the state it was in after its initial
> > commit 72dcd8d ("leds: Add Dell Business Class Netbook LED
> > driver") by removing all remnants of the microphone mute LED
> > handling code.
> > 
> > Patch 7 moves all that is left of dell-led (i.e. the activity LED
> > part, as originally implemented), to a new module which is placed
> > in drivers/platform/x86/dell-wmi-led.c.
> > 
> > This patch series is based on linux-leds/for-4.11 as the LED
> > subsystem is affected by all patches except patch 3.
> > 
> > If anyone reading this has access to a Dell device which has an
> > activity LED and/or a microphone mute LED currently supported by
> > dell-led, I would love to hear from you as I do not have the
> > hardware needed to practically test this patch series.
> 
> I think that it is necessary to find someone who will give their
> Tested-by.
> 
> What I can accept immediately is moving the driver in the current
> shape to x86 platform drivers. I could expose a stable branch with
> that patch for the x86 platform maintainers then.

Adding Mario Limonciello from @dell to discussion.

Mario, any chance you could be able to test this patch series?

> >  drivers/leds/Kconfig                               |  9 ---
> >  drivers/leds/Makefile                              |  1 -
> >  drivers/platform/x86/Kconfig                       |  8 +++
> >  drivers/platform/x86/Makefile                      |  1 +
> >  drivers/platform/x86/dell-laptop.c                 | 28 ++++++++
> >  .../dell-led.c => platform/x86/dell-wmi-led.c}     | 75
> >  +++------------------- include/linux/dell-led.h                  
> >          |  6 +- sound/pci/hda/dell_wmi_helper.c                  
> >   | 18 +++--- 8 files changed, 55 insertions(+), 91 deletions(-)
> >  rename drivers/{leds/dell-led.c => platform/x86/dell-wmi-led.c}
> >  (73%)

-- 
Pali Rohár
pali.rohar@gmail.com

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