Re: [PATCH 1/3] drm/i915: Refactor code to select the DDI buf translation table

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On Thu, Feb 23, 2017 at 07:49:21PM +0200, David Weinehall wrote:
> On Thu, Feb 23, 2017 at 07:35:05PM +0200, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > 
> > Split the code to select the correct trasnslation table into  DP,
> 
> translations, superfluous space before DP

Fixed. And series pushed to dinq. Thanks for the review.

> 
> > eDP and FDI specific helpers. This reduces the clutter in
> > intel_prepare_dp_ddi_buffers(), and we'll have other uses for some
> > of these new helper functions later on.
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> 
> Reviewed-by: David Weinehall <david.weinehall@xxxxxxxxxxxxxxx>
> 
> > ---
> >  drivers/gpu/drm/i915/intel_ddi.c | 126 +++++++++++++++++++++++----------------
> >  1 file changed, 73 insertions(+), 53 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> > index cd6fedd229a0..5e4b0172810d 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -468,6 +468,59 @@ static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port por
> >  	return hdmi_level;
> >  }
> >  
> > +static const struct ddi_buf_trans *
> > +intel_ddi_get_buf_trans_dp(struct drm_i915_private *dev_priv,
> > +			   int *n_entries)
> > +{
> > +	if (IS_KABYLAKE(dev_priv)) {
> > +		return kbl_get_buf_trans_dp(dev_priv, n_entries);
> > +	} else if (IS_SKYLAKE(dev_priv)) {
> > +		return skl_get_buf_trans_dp(dev_priv, n_entries);
> > +	} else if (IS_BROADWELL(dev_priv)) {
> > +		*n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
> > +		return  bdw_ddi_translations_dp;
> > +	} else if (IS_HASWELL(dev_priv)) {
> > +		*n_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
> > +		return hsw_ddi_translations_dp;
> > +	}
> > +
> > +	*n_entries = 0;
> > +	return NULL;
> > +}
> > +
> > +static const struct ddi_buf_trans *
> > +intel_ddi_get_buf_trans_edp(struct drm_i915_private *dev_priv,
> > +			    int *n_entries)
> > +{
> > +	if (IS_KABYLAKE(dev_priv) || IS_SKYLAKE(dev_priv)) {
> > +		return skl_get_buf_trans_edp(dev_priv, n_entries);
> > +	} else if (IS_BROADWELL(dev_priv)) {
> > +		return bdw_get_buf_trans_edp(dev_priv, n_entries);
> > +	} else if (IS_HASWELL(dev_priv)) {
> > +		*n_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
> > +		return hsw_ddi_translations_dp;
> > +	}
> > +
> > +	*n_entries = 0;
> > +	return NULL;
> > +}
> > +
> > +static const struct ddi_buf_trans *
> > +intel_ddi_get_buf_trans_fdi(struct drm_i915_private *dev_priv,
> > +			    int *n_entries)
> > +{
> > +	if (IS_BROADWELL(dev_priv)) {
> > +		*n_entries = ARRAY_SIZE(hsw_ddi_translations_fdi);
> > +		return hsw_ddi_translations_fdi;
> > +	} else if (IS_HASWELL(dev_priv)) {
> > +		*n_entries = ARRAY_SIZE(hsw_ddi_translations_fdi);
> > +		return hsw_ddi_translations_fdi;
> > +	}
> > +
> > +	*n_entries = 0;
> > +	return NULL;
> > +}
> > +
> >  /*
> >   * Starting with Haswell, DDI port buffers must be programmed with correct
> >   * values in advance. This function programs the correct values for
> > @@ -477,45 +530,29 @@ void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder)
> >  {
> >  	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> >  	u32 iboost_bit = 0;
> > -	int i, n_dp_entries, n_edp_entries, size;
> > +	int i, n_entries;
> >  	enum port port = intel_ddi_get_encoder_port(encoder);
> > -	const struct ddi_buf_trans *ddi_translations_fdi;
> > -	const struct ddi_buf_trans *ddi_translations_dp;
> > -	const struct ddi_buf_trans *ddi_translations_edp;
> >  	const struct ddi_buf_trans *ddi_translations;
> >  
> >  	if (IS_GEN9_LP(dev_priv))
> >  		return;
> >  
> > -	if (IS_KABYLAKE(dev_priv)) {
> > -		ddi_translations_fdi = NULL;
> > -		ddi_translations_dp =
> > -				kbl_get_buf_trans_dp(dev_priv, &n_dp_entries);
> > -		ddi_translations_edp =
> > -				skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
> > -	} else if (IS_SKYLAKE(dev_priv)) {
> > -		ddi_translations_fdi = NULL;
> > -		ddi_translations_dp =
> > -				skl_get_buf_trans_dp(dev_priv, &n_dp_entries);
> > -		ddi_translations_edp =
> > -				skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
> > -	} else if (IS_BROADWELL(dev_priv)) {
> > -		ddi_translations_fdi = bdw_ddi_translations_fdi;
> > -		ddi_translations_dp = bdw_ddi_translations_dp;
> > -		ddi_translations_edp = bdw_get_buf_trans_edp(dev_priv, &n_edp_entries);
> > -		n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
> > -	} else if (IS_HASWELL(dev_priv)) {
> > -		ddi_translations_fdi = hsw_ddi_translations_fdi;
> > -		ddi_translations_dp = hsw_ddi_translations_dp;
> > -		ddi_translations_edp = hsw_ddi_translations_dp;
> > -		n_dp_entries = n_edp_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
> > -	} else {
> > -		WARN(1, "ddi translation table missing\n");
> > -		ddi_translations_edp = bdw_ddi_translations_dp;
> > -		ddi_translations_fdi = bdw_ddi_translations_fdi;
> > -		ddi_translations_dp = bdw_ddi_translations_dp;
> > -		n_edp_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
> > -		n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
> > +	switch (encoder->type) {
> > +	case INTEL_OUTPUT_EDP:
> > +		ddi_translations = intel_ddi_get_buf_trans_edp(dev_priv,
> > +							       &n_entries);
> > +		break;
> > +	case INTEL_OUTPUT_DP:
> > +		ddi_translations = intel_ddi_get_buf_trans_dp(dev_priv,
> > +							      &n_entries);
> > +		break;
> > +	case INTEL_OUTPUT_ANALOG:
> > +		ddi_translations = intel_ddi_get_buf_trans_fdi(dev_priv,
> > +							       &n_entries);
> > +		break;
> > +	default:
> > +		MISSING_CASE(encoder->type);
> > +		return;
> >  	}
> >  
> >  	if (IS_GEN9_BC(dev_priv)) {
> > @@ -525,28 +562,11 @@ void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder)
> >  
> >  		if (WARN_ON(encoder->type == INTEL_OUTPUT_EDP &&
> >  			    port != PORT_A && port != PORT_E &&
> > -			    n_edp_entries > 9))
> > -			n_edp_entries = 9;
> > -	}
> > -
> > -	switch (encoder->type) {
> > -	case INTEL_OUTPUT_EDP:
> > -		ddi_translations = ddi_translations_edp;
> > -		size = n_edp_entries;
> > -		break;
> > -	case INTEL_OUTPUT_DP:
> > -		ddi_translations = ddi_translations_dp;
> > -		size = n_dp_entries;
> > -		break;
> > -	case INTEL_OUTPUT_ANALOG:
> > -		ddi_translations = ddi_translations_fdi;
> > -		size = n_dp_entries;
> > -		break;
> > -	default:
> > -		BUG();
> > +			    n_entries > 9))
> > +			n_entries = 9;
> >  	}
> >  
> > -	for (i = 0; i < size; i++) {
> > +	for (i = 0; i < n_entries; i++) {
> >  		I915_WRITE(DDI_BUF_TRANS_LO(port, i),
> >  			   ddi_translations[i].trans1 | iboost_bit);
> >  		I915_WRITE(DDI_BUF_TRANS_HI(port, i),
> > -- 
> > 2.10.2
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel OTC
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