[RFC PATCH 2/9] drm/i915/spi: intel_spi_region map

[Winkler, Tomas]

> On Tue, 16 Feb 2021, Tomas Winkler <tomas.winkler at intel.com> wrote:
> > Add the dGFX spi region map and convey it via mfd cell platform data
> > to the spi child device.
> >
> > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > Cc: Lucas De Marchi <lucas.demarchi at intel.com>
> > Signed-off-by: Tomas Winkler <tomas.winkler at intel.com>
> > ---
> >  drivers/gpu/drm/i915/spi/intel_spi.c | 9 +++++++++
> > drivers/gpu/drm/i915/spi/intel_spi.h | 5 +++++
> >  2 files changed, 14 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/spi/intel_spi.c
> > b/drivers/gpu/drm/i915/spi/intel_spi.c
> > index 07da7197bd5d..6f83f24f7208 100644
> > --- a/drivers/gpu/drm/i915/spi/intel_spi.c
> > +++ b/drivers/gpu/drm/i915/spi/intel_spi.c
> > @@ -14,11 +14,20 @@ static const struct resource spi_resources[] = {
> >  	DEFINE_RES_MEM_NAMED(GEN12_GUNIT_SPI_BASE, 0x80, "i915-
> spi-mmio"),
> > };
> >
> > +static const struct i915_spi_region regions[I915_SPI_REGIONS] = {
> > +	[0] = { .name = "DESCRIPTOR", },
> > +	[2] = { .name = "GSC", },
> > +	[11] = { .name = "OptionROM", },
> > +	[12] = { .name = "DAM", },
> > +};
> > +
> >  static const struct mfd_cell intel_spi_cell = {
> >  	.id = 2,
> >  	.name = "i915-spi",
> >  	.num_resources = ARRAY_SIZE(spi_resources),
> >  	.resources = spi_resources,
> > +	.platform_data = (void *)regions,
> > +	.pdata_size    = sizeof(regions),
> >  };
> >
> >  void intel_spi_init(struct intel_spi *spi, struct drm_i915_private
> > *dev_priv) diff --git a/drivers/gpu/drm/i915/spi/intel_spi.h
> > b/drivers/gpu/drm/i915/spi/intel_spi.h
> > index 276551fed993..6b5bf053f7d3 100644
> > --- a/drivers/gpu/drm/i915/spi/intel_spi.h
> > +++ b/drivers/gpu/drm/i915/spi/intel_spi.h
> > @@ -8,6 +8,11 @@
> >
> >  struct drm_i915_private;
> >
> > +#define I915_SPI_REGIONS 13
> > +struct i915_spi_region {
> > +	const char *name;
> > +};
> 
> Does this need to be exposed to the rest of i915? 
This part is between the device which is part of i915 and the driver.
>If we're trying to isolate
> spi/, I'd prefer it if this header was the only header included from the rest of
> i915, and contained the minimum required information.

> As the driver has grown bigger, we've tried to minimize the interconnections
> between the modules, and it's slow going. Let's try to keep the new parts
> isolated.
>
So do you prefer we create another header or duplicate the structure definition? 

Thanks
Tomas