[Intel-gfx] [PATCH 2/2] drm/i915/ehl/dsi: Enable AFE over PPI strap

[Souza, Jose]

On Wed, 2019-06-19 at 15:52 -0700, Matt Roper wrote:
> On Tue, Jun 18, 2019 at 01:00:00PM -0700, José Roberto de Souza
> wrote:
> > The other additional step in the DSI sequqence for EHL.
> > 
> > BSpec: 20597
> > Cc: Uma Shankar <uma.shankar at intel.com>
> > Cc: Jani Nikula <jani.nikula at intel.com>
> > Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/icl_dsi.c | 8 ++++++++
> >  drivers/gpu/drm/i915/i915_reg.h        | 4 ++++
> >  2 files changed, 12 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c
> > b/drivers/gpu/drm/i915/display/icl_dsi.c
> > index ee85428b309f..3a601c739fc6 100644
> > --- a/drivers/gpu/drm/i915/display/icl_dsi.c
> > +++ b/drivers/gpu/drm/i915/display/icl_dsi.c
> > @@ -542,6 +542,14 @@ static void
> > gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder)
> >  			I915_WRITE(DSI_TA_TIMING_PARAM(port), tmp);
> >  		}
> >  	}
> > +
> > +	if (IS_ELKHARTLAKE(dev_priv)) {
> > +		for_each_dsi_port(port, intel_dsi->ports) {
> > +			tmp = I915_READ(ICL_DPHY_CHKN(port));
> > +			tmp |= ICL_DPHY_CHKN_AFE_OVER_PPI_STRAP;
> > +			I915_WRITE(ICL_DPHY_CHKN(port), tmp);
> > +		}
> > +	}
> >  }
> >  
> >  static void gen11_dsi_gate_clocks(struct intel_encoder *encoder)
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> > b/drivers/gpu/drm/i915/i915_reg.h
> > index 1f2c3ebdf87b..dc7b34cf8b42 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -1993,6 +1993,10 @@ enum i915_power_well_id {
> >  #define   N_SCALAR(x)			((x) << 24)
> >  #define   N_SCALAR_MASK			(0x7F << 24)
> >  
> > +#define _ICL_DPHY_CHKN_REG			0x194
> > +#define ICL_DPHY_CHKN(port)			_MMIO(_ICL_COMB
> > OPHY(port) + _ICL_DPHY_CHKN_REG)
> > +#define   ICL_DPHY_CHKN_AFE_OVER_PPI_STRAP	(1 << 7)
> > +
> 
> Since this is a new register, should we be using REG_BIT() for the
> bit
> definition as described at the top of the file?

I will do that.
Thanks

> 
> Other than that, this all matches the bspec so
> 
> Reviewed-by: Matt Roper <matthew.d.roper at intel.com>
> 
> 
> >  #define MG_PHY_PORT_LN(ln, port, ln0p1, ln0p2, ln1p1) \
> >  	_MMIO(_PORT((port) - PORT_C, ln0p1, ln0p2) + (ln) * ((ln1p1) -
> > (ln0p1)))
> >  
> > -- 
> > 2.22.0
> > 
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