Re: [Intel-gfx] [PATCH 1/5] drm/i915: Call hsw_fdi_link_train() directly()

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Mon, Dec 16, 2019 at 08:37:28PM +0000, Souza, Jose wrote:
> On Fri, 2019-12-13 at 21:52 +0200, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > 
> > Remove the pointless vfunc detour for hsw_fdi_link_train()
> > and just call it directly. Also pass the encoder in so we
> > can nuke the silly encoder loop within.
> > 
> > Cc: José Roberto de Souza <jose.souza@intel.com>
> > Cc: Manasi Navare <manasi.d.navare@intel.com>
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_crt.c     |  2 +-
> >  drivers/gpu/drm/i915/display/intel_ddi.c     | 12 ++++--------
> >  drivers/gpu/drm/i915/display/intel_ddi.h     |  2 +-
> >  drivers/gpu/drm/i915/display/intel_display.c |  2 --
> >  4 files changed, 6 insertions(+), 12 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_crt.c
> > b/drivers/gpu/drm/i915/display/intel_crt.c
> > index 7a2d36905155..50624b8f064d 100644
> > --- a/drivers/gpu/drm/i915/display/intel_crt.c
> > +++ b/drivers/gpu/drm/i915/display/intel_crt.c
> > @@ -278,7 +278,7 @@ static void hsw_pre_enable_crt(struct
> > intel_encoder *encoder,
> >  
> >  	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
> >  
> > -	dev_priv->display.fdi_link_train(crtc, crtc_state);
> > +	hsw_fdi_link_train(encoder, crtc_state);
> >  
> >  	intel_ddi_enable_pipe_clock(crtc_state);
> >  }
> > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> > b/drivers/gpu/drm/i915/display/intel_ddi.c
> > index 5b6f32517c75..94f8bc4cd335 100644
> > --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> > @@ -1107,18 +1107,14 @@ static u32 icl_pll_to_ddi_clk_sel(struct
> > intel_encoder *encoder,
> >   * DDI A (which is used for eDP)
> >   */
> >  
> > -void hsw_fdi_link_train(struct intel_crtc *crtc,
> > +void hsw_fdi_link_train(struct intel_encoder *encoder,
> >  			const struct intel_crtc_state *crtc_state)
> >  {
> > -	struct drm_device *dev = crtc->base.dev;
> > -	struct drm_i915_private *dev_priv = to_i915(dev);
> > -	struct intel_encoder *encoder;
> > +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> > +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> >  	u32 temp, i, rx_ctl_val, ddi_pll_sel;
> >  
> > -	for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
> > -		WARN_ON(encoder->type != INTEL_OUTPUT_ANALOG);
> > -		intel_prepare_dp_ddi_buffers(encoder, crtc_state);
> > -	}
> > +	intel_prepare_dp_ddi_buffers(encoder, crtc_state);
> >  
> >  	/* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed
> > at the
> >  	 * mode set "sequence for CRT port" document:
> > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h
> > b/drivers/gpu/drm/i915/display/intel_ddi.h
> > index 19aeab1246ee..167c6579d972 100644
> > --- a/drivers/gpu/drm/i915/display/intel_ddi.h
> > +++ b/drivers/gpu/drm/i915/display/intel_ddi.h
> > @@ -22,7 +22,7 @@ struct intel_encoder;
> >  void intel_ddi_fdi_post_disable(struct intel_encoder *intel_encoder,
> >  				const struct intel_crtc_state
> > *old_crtc_state,
> >  				const struct drm_connector_state
> > *old_conn_state);
> > -void hsw_fdi_link_train(struct intel_crtc *crtc,
> > +void hsw_fdi_link_train(struct intel_encoder *encoder,
> >  			const struct intel_crtc_state *crtc_state);
> >  void intel_ddi_init(struct drm_i915_private *dev_priv, enum port
> > port);
> >  bool intel_ddi_get_hw_state(struct intel_encoder *encoder, enum pipe
> > *pipe);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index 0f37f1d2026d..8aed67d2c105 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -16673,8 +16673,6 @@ void intel_init_display_hooks(struct
> > drm_i915_private *dev_priv)
> >  	} else if (IS_IVYBRIDGE(dev_priv)) {
> >  		/* FIXME: detect B0+ stepping and use auto training */
> >  		dev_priv->display.fdi_link_train =
> > ivb_manual_fdi_link_train;
> > -	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> > -		dev_priv->display.fdi_link_train = hsw_fdi_link_train;
> 
> Just missing the chunk removing fdi_link_train from
> drm_i915_display_funcs.

Still need it for pre-hsw.

> 
> With that:
> 
> Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
> 
> >  	}
> >  
> >  	if (INTEL_GEN(dev_priv) >= 9)

-- 
Ville Syrjälä
Intel
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