Re: [PATCH v2 4/9] drm/i915: Add reverse mapping between port and intel_encoder

[Daniel Vetter <daniel@ffwll.ch>]

On Fri, Dec 04, 2015 at 03:40:03PM +0100, Takashi Iwai wrote:
> On Tue, 01 Dec 2015 17:09:53 +0100,
> Takashi Iwai wrote:
> > 
> > This patch adds a reverse mapping from a digital port number to
> > intel_encoder object containing the corresponding intel_digital_port.
> > It simplifies the query of the encoder a lot.
> 
> While this is good for a code reduction, I guess it's better to leave
> away for now, as there will be more changes there for MST support.
> It may put yet another loop, and the mapping implemented here might
> not be the best way.  So I'm going to drop this from the next
> patchset.
> 
> If anyone still thinks this is worth to include, let me know.  I'll
> re-add this.

Yeah I think this looks good. Fixing up conflicts with MST shouldn't be
that much trouble really.
-Daniel

> 
> 
> thanks,
> 
> Takashi
> 
> > 
> > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > ---
> >  drivers/gpu/drm/i915/i915_drv.h    |  2 ++
> >  drivers/gpu/drm/i915/intel_audio.c | 22 ++--------------------
> >  drivers/gpu/drm/i915/intel_ddi.c   |  1 +
> >  drivers/gpu/drm/i915/intel_dp.c    |  1 +
> >  drivers/gpu/drm/i915/intel_hdmi.c  |  2 ++
> >  5 files changed, 8 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index 95bb27de774f..3483d8125eac 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -1955,6 +1955,8 @@ struct drm_i915_private {
> >  	/* perform PHY state sanity checks? */
> >  	bool chv_phy_assert[2];
> >  
> > +	struct intel_encoder *dig_port_map[I915_MAX_PORTS];
> > +
> >  	/*
> >  	 * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
> >  	 * will be rejected. Instead look for a better place.
> > diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> > index 19958bdb9bd0..67ee99f00ddd 100644
> > --- a/drivers/gpu/drm/i915/intel_audio.c
> > +++ b/drivers/gpu/drm/i915/intel_audio.c
> > @@ -630,28 +630,10 @@ static int i915_audio_component_get_cdclk_freq(struct device *dev)
> >  	return ret;
> >  }
> >  
> > -static struct intel_encoder *audio_port_to_encoder(struct drm_device *drm_dev,
> > -						   int port)
> > -{
> > -	struct intel_encoder *intel_encoder;
> > -	struct intel_digital_port *intel_dig_port;
> > -
> > -	for_each_intel_encoder(drm_dev, intel_encoder) {
> > -		if (intel_encoder->type != INTEL_OUTPUT_HDMI &&
> > -		    intel_encoder->type != INTEL_OUTPUT_DISPLAYPORT)
> > -			continue;
> > -		intel_dig_port = enc_to_dig_port(&intel_encoder->base);
> > -		if (port == intel_dig_port->port)
> > -			return intel_encoder;
> > -	}
> > -	return NULL;
> > -}
> > -
> >  static int i915_audio_component_sync_audio_rate(struct device *dev,
> >  						int port, int rate)
> >  {
> >  	struct drm_i915_private *dev_priv = dev_to_i915(dev);
> > -	struct drm_device *drm_dev = dev_priv->dev;
> >  	struct intel_encoder *intel_encoder;
> >  	struct intel_crtc *crtc;
> >  	struct drm_display_mode *mode;
> > @@ -668,7 +650,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
> >  
> >  	mutex_lock(&dev_priv->av_mutex);
> >  	/* 1. get the pipe */
> > -	intel_encoder = audio_port_to_encoder(drm_dev, port);
> > +	intel_encoder = dev_priv->dig_port_map[port];
> >  	if (!intel_encoder || intel_encoder->type != INTEL_OUTPUT_HDMI) {
> >  		DRM_DEBUG_KMS("no pipe for the port %c\n", port_name(port));
> >  		mutex_unlock(&dev_priv->av_mutex);
> > @@ -725,7 +707,7 @@ static int i915_audio_component_get_eld(struct device *dev, int port,
> >  	int ret = -EINVAL;
> >  
> >  	drm_modeset_lock_all(drm_dev);
> > -	intel_encoder = audio_port_to_encoder(drm_dev, port);
> > +	intel_encoder = dev_priv->dig_port_map[port];
> >  	if (intel_encoder) {
> >  		ret = 0;
> >  		intel_dig_port = enc_to_dig_port(&intel_encoder->base);
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> > index a6752a61d99f..6770110a4075 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -3285,6 +3285,7 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
> >  	intel_encoder->get_config = intel_ddi_get_config;
> >  
> >  	intel_dig_port->port = port;
> > +	dev_priv->dig_port_map[port] = intel_encoder;
> >  	intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
> >  					  (DDI_BUF_PORT_REVERSAL |
> >  					   DDI_A_4_LANES);
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> > index 09bdd94ca3ba..1c02c6466f30 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -6201,6 +6201,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> >  	}
> >  
> >  	intel_dig_port->port = port;
> > +	dev_priv->dig_port_map[port] = intel_encoder;
> >  	intel_dig_port->dp.output_reg = output_reg;
> >  
> >  	intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
> > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> > index 9eafa191cee2..1d9f522a6679 100644
> > --- a/drivers/gpu/drm/i915/intel_hdmi.c
> > +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> > @@ -2133,6 +2133,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> >  
> >  void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
> >  {
> > +	struct drm_i915_private *dev_priv = dev->dev_private;
> >  	struct intel_digital_port *intel_dig_port;
> >  	struct intel_encoder *intel_encoder;
> >  	struct intel_connector *intel_connector;
> > @@ -2201,6 +2202,7 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
> >  		intel_encoder->cloneable |= 1 << INTEL_OUTPUT_HDMI;
> >  
> >  	intel_dig_port->port = port;
> > +	dev_priv->dig_port_map[port] = intel_encoder;
> >  	intel_dig_port->hdmi.hdmi_reg = hdmi_reg;
> >  	intel_dig_port->dp.output_reg = 0;
> >  
> > -- 
> > 2.6.3
> > 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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