[Intel-gfx] [PATCH 02/10] drm/i915/psr: program vsc header for psr2

[Rodrigo Vivi]

patch merged to dinq. thanks for patch and review.

On Wed, Jan 4, 2017 at 3:48 PM Jim Bride <jim.bride at linux.intel.com> wrote:

> On Mon, Jan 02, 2017 at 05:00:55PM +0530, vathsala nagaraju wrote:
> > Function hsw_psr_setup handles vsc header setup for psr1 and
> > skl_psr_setup_vsc handles vsc header setup for psr2.
> >
> > Setup VSC header in function skl_psr_setup_vsc for psr2 support,
> > as per edp 1.4 spec, table 6-11:VSC SDP HEADER Extension for psr2
> > operation.
> >
> > v2: (Jani)
> > - Initialize variables to 0
> > - intel_dp_get_y_cord_status and intel_dp_get_y_cord_status made static
> > - Correct indentation for continuation lines
> > - Change DP_PSR_Y_COORDINATE to  DP_PSR2_SU_Y_COORDINATE_REQUIRED
> > - Change DPRX_FEATURE_ENUMERATION_LIST to DP_DPRX_*
> > - Change VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED to DP_VSC_*
> >
> > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > Cc: Jim Bride <jim.bride at linux.intel.com>
> > Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju at intel.com>
> > Signed-off-by: Patil Deepti <deepti.patil at intel.com>
>
> Reviewed-by: Jim Bride <jim.bride at linux.intel.com>
>
> > ---
> >  drivers/gpu/drm/i915/i915_drv.h  |  2 ++
> >  drivers/gpu/drm/i915/intel_dp.c  | 26 ++++++++++++++++++++++++++
> >  drivers/gpu/drm/i915/intel_psr.c | 17 +++++++++++++++--
> >  3 files changed, 43 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h
> > index 22d3f61..36dc835 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -1164,6 +1164,8 @@ struct i915_psr {
> >       bool psr2_support;
> >       bool aux_frame_sync;
> >       bool link_standby;
> > +     bool y_cord_support;
> > +     bool colorimetry_support;
> >  };
> >
> >  enum intel_pch {
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> b/drivers/gpu/drm/i915/intel_dp.c
> > index fb12896..da577c9 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -3042,6 +3042,24 @@ static void chv_dp_post_pll_disable(struct
> intel_encoder *encoder,
> >                               DP_LINK_STATUS_SIZE) ==
> DP_LINK_STATUS_SIZE;
> >  }
> >
> > +static bool intel_dp_get_y_cord_status(struct intel_dp *intel_dp)
> > +{
> > +     uint8_t psr_caps = 0;
> > +
> > +     drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_CAPS, &psr_caps);
> > +     return psr_caps & DP_PSR2_SU_Y_COORDINATE_REQUIRED;
> > +}
> > +
> > +static bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
> > +{
> > +     uint8_t dprx = 0;
> > +
> > +     drm_dp_dpcd_readb(&intel_dp->aux,
> > +                     DP_DPRX_FEATURE_ENUMERATION_LIST,
> > +                     &dprx);
> > +     return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED;
> > +}
> > +
> >  /* These are source-specific values. */
> >  uint8_t
> >  intel_dp_voltage_max(struct intel_dp *intel_dp)
> > @@ -3620,6 +3638,14 @@ void intel_dp_set_idle_link_train(struct intel_dp
> *intel_dp)
> >               dev_priv->psr.psr2_support = dev_priv->psr.aux_frame_sync;
> >               DRM_DEBUG_KMS("PSR2 %s on sink",
> >                             dev_priv->psr.psr2_support ? "supported" :
> "not supported");
> > +
> > +             if (dev_priv->psr.psr2_support) {
> > +                     dev_priv->psr.y_cord_support =
> > +                             intel_dp_get_y_cord_status(intel_dp);
> > +                     dev_priv->psr.colorimetry_support =
> > +                             intel_dp_get_colorimetry_status(intel_dp);
> > +             }
> > +
> >       }
> >
> >       /* Read the eDP Display control capabilities registers */
> > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> > index 6aca8ff..c3aa649 100644
> > --- a/drivers/gpu/drm/i915/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > @@ -122,13 +122,26 @@ static void vlv_psr_setup_vsc(struct intel_dp
> *intel_dp)
> >  static void skl_psr_setup_su_vsc(struct intel_dp *intel_dp)
> >  {
> >       struct edp_vsc_psr psr_vsc;
> > +     struct intel_digital_port *intel_dig_port =
> dp_to_dig_port(intel_dp);
> > +     struct drm_device *dev = intel_dig_port->base.base.dev;
> > +     struct drm_i915_private *dev_priv = to_i915(dev);
> >
> >       /* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */
> >       memset(&psr_vsc, 0, sizeof(psr_vsc));
> >       psr_vsc.sdp_header.HB0 = 0;
> >       psr_vsc.sdp_header.HB1 = 0x7;
> > -     psr_vsc.sdp_header.HB2 = 0x3;
> > -     psr_vsc.sdp_header.HB3 = 0xb;
> > +     if (dev_priv->psr.colorimetry_support &&
> > +             dev_priv->psr.y_cord_support) {
> > +             psr_vsc.sdp_header.HB2 = 0x5;
> > +             psr_vsc.sdp_header.HB3 = 0x13;
> > +     } else if (dev_priv->psr.y_cord_support) {
> > +             psr_vsc.sdp_header.HB2 = 0x4;
> > +             psr_vsc.sdp_header.HB3 = 0xe;
> > +     } else {
> > +             psr_vsc.sdp_header.HB2 = 0x3;
> > +             psr_vsc.sdp_header.HB3 = 0xc;
> > +     }
> > +
> >       intel_psr_write_vsc(intel_dp, &psr_vsc);
> >  }
> >
> > --
> > 1.9.1
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