Re: [PATCH 2/3] mfd: intel_soc_pmic: Rename pwm_backlight pwm-lookup to pwm_pmic_backlight

[Hans de Goede]

Hi Lee,

On 10-12-2019 09:51, Lee Jones wrote:
> On Tue, 19 Nov 2019, Hans de Goede wrote:
>
> > At least Bay Trail (BYT) and Cherry Trail (CHT) devices can use 1 of 2
> > different PWM controllers for controlling the LCD's backlight brightness.
> >
> > Either the one integrated into the PMIC or the one integrated into the
> > SoC (the 1st LPSS PWM controller).
> >
> > So far in the LPSS code on BYT we have skipped registering the LPSS PWM
> > controller "pwm_backlight" lookup entry when a Crystal Cove PMIC is
> > present, assuming that in this case the PMIC PWM controller will be used.
> >
> > On CHT we have been relying on only 1 of the 2 PWM controllers being
> > enabled in the DSDT at the same time; and always registered the lookup.
> >
> > So far this has been working, but the correct way to determine which PWM
> > controller needs to be used is by checking a bit in the VBT table and
> > recently I've learned about 2 different BYT devices:
> > Point of View MOBII TAB-P800W
> > Acer Switch 10 SW5-012
> >
> > Which use a Crystal Cove PMIC, yet the LCD is connected to the SoC/LPSS
> > PWM controller (and the VBT correctly indicates this), so here our old
> > heuristics fail.
> >
> > Since only the i915 driver has access to the VBT, this commit renames
> > the "pwm_backlight" lookup entries for the Crystal Cove PMIC's PWM
> > controller to "pwm_pmic_backlight" so that the i915 driver can do a
> > pwm_get() for the right controller depending on the VBT bit, instead of
> > the i915 driver relying on a "pwm_backlight" lookup getting registered
> > which magically points to the right controller.
> >
> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> > ---
> >   drivers/mfd/intel_soc_pmic_core.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
>
> For my own reference:
>    Acked-for-MFD-by: Lee Jones <lee.jones@xxxxxxxxxx>

As mentioned in the cover-letter, to avoid breaking bi-sectability
as well as to avoid breaking the intel-gfx CI we need to merge this series
in one go through one tree. Specifically through the drm-intel tree.
Is that ok with you ?

If this is ok with you, then you do not have to do anything, I will just push
the entire series to drm-intel. drivers/mfd/intel_soc_pmic_core.c
does not see much changes so I do not expect this to lead to any conflicts.

Regards,

Hans