Re: [Intel-gfx] [PATCH v6 2/6] drm/i915: hdmi: add CEC notifier to intel_hdmi

[Rodrigo Vivi <rodrigo.vivi@intel.com>]

On Wed, May 30, 2018 at 06:29:36PM +0300, Ville Syrjälä wrote:
> On Thu, May 24, 2018 at 11:57:17AM +0200, Neil Armstrong wrote:
> > This patchs adds the cec_notifier feature to the intel_hdmi part
> > of the i915 DRM driver. It uses the HDMI DRM connector name to differentiate
> > between each HDMI ports.
> > The changes will allow the i915 HDMI code to notify EDID and HPD changes
> > to an eventual CEC adapter.
> > 
> > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> > Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
> > ---
> >  drivers/gpu/drm/i915/Kconfig         |  1 +
> >  drivers/gpu/drm/i915/intel_display.h | 20 ++++++++++++++++++++
> >  drivers/gpu/drm/i915/intel_drv.h     |  2 ++
> >  drivers/gpu/drm/i915/intel_hdmi.c    | 13 +++++++++++++
> >  4 files changed, 36 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
> > index dfd9588..2d65d56 100644
> > --- a/drivers/gpu/drm/i915/Kconfig
> > +++ b/drivers/gpu/drm/i915/Kconfig
> > @@ -23,6 +23,7 @@ config DRM_I915
> >  	select SYNC_FILE
> >  	select IOSF_MBI
> >  	select CRC32
> > +	select CEC_CORE if CEC_NOTIFIER
> >  	help
> >  	  Choose this option if you have a system that has "Intel Graphics
> >  	  Media Accelerator" or "HD Graphics" integrated graphics,
> > diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
> > index 4e7418b..c68d1c8 100644
> > --- a/drivers/gpu/drm/i915/intel_display.h
> > +++ b/drivers/gpu/drm/i915/intel_display.h
> > @@ -126,6 +126,26 @@ enum port {
> >  
> >  #define port_name(p) ((p) + 'A')
> >  
> > +static inline const char *port_identifier(enum port port)
> > +{
> > +	switch (port) {
> > +	case PORT_A:
> > +		return "Port A";
> > +	case PORT_B:
> > +		return "Port B";
> > +	case PORT_C:
> > +		return "Port C";
> > +	case PORT_D:
> > +		return "Port D";
> > +	case PORT_E:
> > +		return "Port E";
> > +	case PORT_F:
> > +		return "Port F";
> > +	default:
> > +		return "<invalid>";
> > +	}
> > +}
> 
> Could use a comment to make it clear that this identifier is
> expected to remain stable since it's referenced from other drivers.
> 
> > +
> >  enum dpio_channel {
> >  	DPIO_CH0,
> >  	DPIO_CH1
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> > index d436858..b50e51b 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -39,6 +39,7 @@
> >  #include <drm/drm_dp_mst_helper.h>
> >  #include <drm/drm_rect.h>
> >  #include <drm/drm_atomic.h>
> > +#include <media/cec-notifier.h>
> >  
> >  /**
> >   * __wait_for - magic wait macro
> > @@ -1001,6 +1002,7 @@ struct intel_hdmi {
> >  	bool has_audio;
> >  	bool rgb_quant_range_selectable;
> >  	struct intel_connector *attached_connector;
> > +	struct cec_notifier *notifier;
> 
> "notifier" seems a bit too generic a name. "cec_notifier" would be
> better.
> 
> Apart from that this seems OK to me
> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

It seems that you will need to push this to other trees right?
Feel free to use:

Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

> 
> >  };
> >  
> >  struct intel_dp_mst_encoder;
> > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> > index 1baef4a..d522b5b 100644
> > --- a/drivers/gpu/drm/i915/intel_hdmi.c
> > +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> > @@ -1868,6 +1868,8 @@ intel_hdmi_set_edid(struct drm_connector *connector)
> >  		connected = true;
> >  	}
> >  
> > +	cec_notifier_set_phys_addr_from_edid(intel_hdmi->notifier, edid);
> > +
> >  	return connected;
> >  }
> >  
> > @@ -1876,6 +1878,7 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
> >  {
> >  	enum drm_connector_status status;
> >  	struct drm_i915_private *dev_priv = to_i915(connector->dev);
> > +	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
> >  
> >  	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> >  		      connector->base.id, connector->name);
> > @@ -1891,6 +1894,9 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
> >  
> >  	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
> >  
> > +	if (status != connector_status_connected)
> > +		cec_notifier_phys_addr_invalidate(intel_hdmi->notifier);
> > +
> >  	return status;
> >  }
> >  
> > @@ -2031,6 +2037,8 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
> >  
> >  static void intel_hdmi_destroy(struct drm_connector *connector)
> >  {
> > +	if (intel_attached_hdmi(connector)->notifier)
> > +		cec_notifier_put(intel_attached_hdmi(connector)->notifier);
> >  	kfree(to_intel_connector(connector)->detect_edid);
> >  	drm_connector_cleanup(connector);
> >  	kfree(connector);
> > @@ -2358,6 +2366,11 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> >  		u32 temp = I915_READ(PEG_BAND_GAP_DATA);
> >  		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
> >  	}
> > +
> > +	intel_hdmi->notifier = cec_notifier_get_conn(dev->dev,
> > +						     port_identifier(port));
> > +	if (!intel_hdmi->notifier)
> > +		DRM_DEBUG_KMS("CEC notifier get failed\n");
> >  }
> >  
> >  void intel_hdmi_init(struct drm_i915_private *dev_priv,
> > -- 
> > 2.7.4
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Ville Syrjälä
> Intel
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