[Intel-gfx] [Intel-xe] [PATCH v2 02/27] drm/i915/lnl: Add display definitions

[Matt Roper]

On Fri, Sep 08, 2023 at 06:25:04PM -0500, Lucas De Marchi wrote:
> On Thu, Sep 07, 2023 at 09:10:44AM -0700, Matt Roper wrote:
> > On Thu, Sep 07, 2023 at 08:37:32AM -0700, Lucas De Marchi wrote:
> > > From: Balasubramani Vivekanandan <balasubramani.vivekanandan at intel.com>
> > > 
> > > Add Lunar Lake platform definitions for i915 display. The support for
> > > LNL will be added to the xe driver, with i915 only driving the display
> > > side. Therefore define IS_LUNARLAKE to 0 to disable it when building the
> > > i915 module.
> > 
> > This final sentence no longer matches the patch.  But it might be worth
> > adding a different sentence saying something like "Xe2 display is
> > derived from the Xe_LPD+ IP; additional feature deltas will be
> > introduced in subsequent patches."
> > 
> > > 
> > > v2: Use a LPDP_FEATURES macro (Matt Roper)
> > > 
> > > Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan at intel.com>
> > > Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/display/intel_display_device.c | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c b/drivers/gpu/drm/i915/display/intel_display_device.c
> > > index 089674e2f1d2..feafb0f94b06 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_display_device.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_display_device.c
> > > @@ -768,6 +768,12 @@ static const struct intel_display_device_info xe_lpdp_display = {
> > >  	.__runtime_defaults.fbc_mask = BIT(INTEL_FBC_A) | BIT(INTEL_FBC_B),
> > >  };
> > > 
> > > +static const struct intel_display_device_info xe2_lpd_display = {
> > > +	XE_LPDP_FEATURES,
> > > +
> > > +	.__runtime_defaults.ip.ver = 20,
> > 
> > There's no need to set a default value here, right?  If we've managed to
> 
> unless we have a broken check for display version before this is
> initialized. I will give it a try and see what happens.
> 
> But if we remove it here, we should also remove on previous patch.  As
> far as I can see, it's true for Xe-LPD+ too. If we have a wrong check
> for version, I'd rather prefer it broken and a loud warning than it
> matching version 14 due to using the macro above.

Agreed, we shouldn't have it on Xe_LPD+ either.  I meant to mention
that, but I guess I forgot.


Matt

> 
> Lucas De Marchi
> 
> > match this IP block, we already read out the GMD ID version and matched
> > it against the table below.  We'll be assigning the real value directly
> > and shouldn't need this for anything.
> > 
> > 
> > Matt
> > 
> > > +};
> > > +
> > >  /*
> > >   * Separate detection for no display cases to keep the display id array simple.
> > >   *
> > > @@ -847,6 +853,7 @@ static const struct {
> > >  	const struct intel_display_device_info *display;
> > >  } gmdid_display_map[] = {
> > >  	{ 14,  0, &xe_lpdp_display },
> > > +	{ 20,  0, &xe2_lpd_display },
> > >  };
> > > 
> > >  static const struct intel_display_device_info *
> > > --
> > > 2.40.1
> > > 
> > 
> > -- 
> > Matt Roper
> > Graphics Software Engineer
> > Linux GPU Platform Enablement
> > Intel Corporation

-- 
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation