[PATCH resend 2/4] backlight: Add backlight device (un)registration notification

[Lee Jones]

> On 05/26/2014 01:03 PM, Rafael J. Wysocki wrote:
> > On Monday, May 26, 2014 12:03:43 PM Jingoo Han wrote:
> >> On Thursday, May 22, 2014 6:02 PM, Lee Jones wrote:
> >>> On Thursday, May 22, 2014 5:45 PM, Hans de Goede wrote:
> >>>> On Thursday, May 22, 2014 8:31 AM, Rafael J. Wysocki wrote:
> >>>>> On Wednesday, May 21, 2014 10:40 PM, Hans de Goede wrote:
> >>>>>> Some firmware drivers, ie acpi-video want to get themselves out of the
> >>>>>> way (in some cases) when their also is a raw backlight device available.
> >>>>>>
> >>>>>> Due to module loading ordering being unknown, acpi-video cannot be certain
> >>>>>> that the backlight_device_registered(BACKLIGHT_RAW) it does for this is
> >>>>>> the final verdict wrt there being a BACKLIGHT_RAW device.
> >>>>>>
> >>>>>> By adding notification acpi-video can listen for backlight devices showing
> >>>>>> up after it has loaded, and unregister its backlight device if desired.
> >>>>>>
> >>>>>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> >>>>>
> >>>>> Backlight maintainer's ACK is requisite here.
> >>>>
> >>>> Agreed, which is why I send this set to all 3 the backlight maintainers
> >>>> directly on both postings.
> >>>>
> >>>> What may be helpful for them is to hear from you if you're ok with the
> >>>> acpi-video bits which are actually going to use this, since those will
> >>>> be the only user of the new backlight api (for now).
> >>>
> >>> I'm happy to apply any Backlight patches which have either Bryan or
> >>> Jingoo's Ack, as they are the reviewers for the BL subsystem.
> >>
> >> Acked-by: Jingoo Han <jg1.han at samsung.com>
> >>
> >> Lee Jones,
> >> Would you merge this patch into your backlight git tree?
> > 
> > Hans, does this series depend on things that I've applied already?  If so,
> > I'd very much prefer to take this series too as a whole.
> 
> The 3th patch in this series:
> " acpi-video: Unregister the backlight device if a raw one shows up later"
> depends on my "acpi-video: Add an acpi_video_unregister_backlight function"
> patch, which you've applied to your linux-next branch already.
> 
> As well as on the 2nd patch in this series:
> "backlight: Add backlight device (un)registration notification"
> 
> So I agree that it is a good idea to take the whole series through your tree.

I'm fine with that.

Rafael, could you apply the set onto an immutable branch and send me a
signed pull-request please?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
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