Re: [PATCH v3 05/10] drm/i915/psr/cnl: Enable Y-coordinate support in source

["Souza, Jose" <jose.souza@intel.com>]

On Fri, 2018-03-30 at 10:36 -0700, Pandiyan, Dhinakaran wrote:
> 
> 
> On Wed, 2018-03-28 at 15:30 -0700, José Roberto de Souza wrote:
> > For Geminilake and Cannonlake+ the Y-coordinate support must be
> > enabled in PSR2_CTL too.
> > 
> > Spec: 7713 and 7720
> > 
> > Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
> > Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> > Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
> > ---
> > 
> > v3: rebased
> > 
> >  drivers/gpu/drm/i915/i915_reg.h  |  3 +++
> >  drivers/gpu/drm/i915/intel_psr.c | 16 ++++++++++++----
> >  2 files changed, 15 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> > b/drivers/gpu/drm/i915/i915_reg.h
> > index 33e52cc98d99..9d61ab1288d3 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -4058,6 +4058,8 @@ enum {
> >  #define EDP_PSR2_CTL			_MMIO(0x6f900)
> >  #define   EDP_PSR2_ENABLE		(1<<31)
> >  #define   EDP_SU_TRACK_ENABLE		(1<<30)
> > +#define   EDP_Y_COORDINATE_VALID	(1<<26) /* GLK and CNL+ */
> > +#define   EDP_Y_COORDINATE_ENABLE	(1<<25) /* GLK and CNL+
> > */
> >  #define   EDP_MAX_SU_DISABLE_TIME(t)	((t)<<20)
> >  #define   EDP_MAX_SU_DISABLE_TIME_MASK	(0x1f<<20)
> >  #define   EDP_PSR2_TP2_TIME_500		(0<<8)
> > @@ -7064,6 +7066,7 @@ enum {
> >  #define CHICKEN_TRANS_A         0x420c0
> >  #define CHICKEN_TRANS_B         0x420c4
> >  #define CHICKEN_TRANS(trans) _MMIO_TRANS(trans, CHICKEN_TRANS_A,
> > CHICKEN_TRANS_B)
> > +#define  VSC_DATA_SEL_SOFTWARE_CONTROL	(1<<25) /* GLK and
> > CNL+ */
> >  #define  DDI_TRAINING_OVERRIDE_ENABLE	(1<<19)
> >  #define  DDI_TRAINING_OVERRIDE_VALUE	(1<<18)
> >  #define  DDIE_TRAINING_OVERRIDE_ENABLE	(1<<17) /*
> > CHICKEN_TRANS_A only */
> > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> > b/drivers/gpu/drm/i915/intel_psr.c
> > index fb2d0fe7106b..84e1f8be5c48 100644
> > --- a/drivers/gpu/drm/i915/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > @@ -386,8 +386,10 @@ static void hsw_activate_psr2(struct intel_dp
> > *intel_dp)
> >  	/* FIXME: selective update is probably totally broken
> > because it doesn't
> >  	 * mesh at all with our frontbuffer tracking. And the hw
> > alone isn't
> >  	 * good enough. */
> > -	val |= EDP_PSR2_ENABLE |
> > -		EDP_SU_TRACK_ENABLE;
> > +	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
> > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> > {
> > +		val |= EDP_Y_COORDINATE_VALID |
> > EDP_Y_COORDINATE_ENABLE;
> 
> Bspecs says Bit 26 : Y-coordinate valid
> 1b stands for "Do not include Y-coordinate valid eDP 1.4".
> 
> Was "val |= EDP_Y_COORDINATE_VALID" intended?

Hum not intended, I will send a patch fixing it.
Thanks

> 
> 
> > +	}
> >  
> >  	if (drm_dp_dpcd_readb(&intel_dp->aux,
> >  				DP_SYNCHRONIZATION_LATENCY_IN_SINK
> > ,
> > @@ -569,8 +571,14 @@ static void hsw_psr_enable_source(struct
> > intel_dp *intel_dp,
> >  		hsw_psr_setup_aux(intel_dp);
> >  
> >  	if (dev_priv->psr.psr2_support) {
> > -		u32 chicken = PSR2_VSC_ENABLE_PROG_HEADER
> > -			      | PSR2_ADD_VERTICAL_LINE_COUNT;
> > +		u32 chicken =
> > I915_READ(CHICKEN_TRANS(cpu_transcoder));
> > +
> > +		if (INTEL_GEN(dev_priv) == 9 &&
> > !IS_GEMINILAKE(dev_priv))
> > +			chicken |= (PSR2_VSC_ENABLE_PROG_HEADER
> > +				   |
> > PSR2_ADD_VERTICAL_LINE_COUNT);
> > +
> > +		else
> > +			chicken &= ~VSC_DATA_SEL_SOFTWARE_CONTROL;
> >  		I915_WRITE(CHICKEN_TRANS(cpu_transcoder),
> > chicken);
> >  
> >  		I915_WRITE(EDP_PSR_DEBUG,
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