[PATCH v4 08/16] drm/i915/hdcp: Pass dig_port to intel_hdcp_init

[Anshuman Gupta]

On 2020-11-05 at 22:09:12 +0530, Ramalingam C wrote:
> On 2020-10-27 at 22:12:00 +0530, Anshuman Gupta wrote:
> > Pass dig_port as an argument to intel_hdcp_init()
> > and intel_hdcp2_init().
> > This will be required for HDCP 2.2 stream encryption.
> > 
> > Cc: Ramalingam C <ramalingam.c at intel.com>
> > Reviewed-by: Uma Shankar <uma.shankar at intel.com>
> > Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_dp_hdcp.c |  4 ++--
> >  drivers/gpu/drm/i915/display/intel_hdcp.c    | 12 +++++++-----
> >  drivers/gpu/drm/i915/display/intel_hdcp.h    |  4 +++-
> >  drivers/gpu/drm/i915/display/intel_hdmi.c    |  2 +-
> >  4 files changed, 13 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > index 6dcbfaffd2c5..591b68e5de48 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > @@ -751,10 +751,10 @@ int intel_dp_init_hdcp(struct intel_digital_port *dig_port,
> >  		return 0;
> >  
> >  	if (intel_connector->mst_port)
> > -		return intel_hdcp_init(intel_connector, port,
> > +		return intel_hdcp_init(intel_connector, dig_port,
> cant we retrieve the dig_port from connector?
No, actually intel_hdcp_init get called for DP MST in atomic check phase,
in atomic check phase DP MST connector->encoder is not initialize  yet,
it initialize  with DP MST encoder in commit phase.
so using intel_attached_dig_port(connector) results in OOPS in intel_hdcp_init().
Thanks,
Anshuman Gupta.
> 
> -Ram
> >  				       &intel_dp_mst_hdcp_shim);
> >  	else if (!intel_dp_is_edp(intel_dp))
> > -		return intel_hdcp_init(intel_connector, port,
> > +		return intel_hdcp_init(intel_connector, dig_port,
> >  				       &intel_dp_hdcp_shim);
> >  
> >  	return 0;
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > index 937af4aeaac2..b0f47687bc59 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -1982,12 +1982,13 @@ static enum mei_fw_tc intel_get_mei_fw_tc(enum transcoder cpu_transcoder)
> >  }
> >  
> >  static int initialize_hdcp_port_data(struct intel_connector *connector,
> > -				     enum port port,
> > +				     struct intel_digital_port *dig_port,
> >  				     const struct intel_hdcp_shim *shim)
> >  {
> >  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> >  	struct intel_hdcp *hdcp = &connector->hdcp;
> >  	struct hdcp_port_data *data = &hdcp->port_data;
> > +	enum port port = dig_port->base.port;
> >  
> >  	if (INTEL_GEN(dev_priv) < 12)
> >  		data->fw_ddi = intel_get_mei_fw_ddi_index(port);
> > @@ -2060,14 +2061,15 @@ void intel_hdcp_component_init(struct drm_i915_private *dev_priv)
> >  	}
> >  }
> >  
> > -static void intel_hdcp2_init(struct intel_connector *connector, enum port port,
> > +static void intel_hdcp2_init(struct intel_connector *connector,
> > +			     struct intel_digital_port *dig_port,
> >  			     const struct intel_hdcp_shim *shim)
> >  {
> >  	struct drm_i915_private *i915 = to_i915(connector->base.dev);
> >  	struct intel_hdcp *hdcp = &connector->hdcp;
> >  	int ret;
> >  
> > -	ret = initialize_hdcp_port_data(connector, port, shim);
> > +	ret = initialize_hdcp_port_data(connector, dig_port, shim);
> >  	if (ret) {
> >  		drm_dbg_kms(&i915->drm, "Mei hdcp data init failed\n");
> >  		return;
> > @@ -2077,7 +2079,7 @@ static void intel_hdcp2_init(struct intel_connector *connector, enum port port,
> >  }
> >  
> >  int intel_hdcp_init(struct intel_connector *connector,
> > -		    enum port port,
> > +		    struct intel_digital_port *dig_port,
> >  		    const struct intel_hdcp_shim *shim)
> >  {
> >  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > @@ -2088,7 +2090,7 @@ int intel_hdcp_init(struct intel_connector *connector,
> >  		return -EINVAL;
> >  
> >  	if (is_hdcp2_supported(dev_priv) && !connector->mst_port)
> > -		intel_hdcp2_init(connector, port, shim);
> > +		intel_hdcp2_init(connector, dig_port, shim);
> >  
> >  	ret =
> >  	drm_connector_attach_content_protection_property(&connector->base,
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h b/drivers/gpu/drm/i915/display/intel_hdcp.h
> > index b912a3a0f5b8..8f53b0c7fe5c 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.h
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
> > @@ -18,13 +18,15 @@ struct intel_connector;
> >  struct intel_crtc_state;
> >  struct intel_encoder;
> >  struct intel_hdcp_shim;
> > +struct intel_digital_port;
> >  enum port;
> >  enum transcoder;
> >  
> >  void intel_hdcp_atomic_check(struct drm_connector *connector,
> >  			     struct drm_connector_state *old_state,
> >  			     struct drm_connector_state *new_state);
> > -int intel_hdcp_init(struct intel_connector *connector, enum port port,
> > +int intel_hdcp_init(struct intel_connector *connector,
> > +		    struct intel_digital_port *dig_port,
> >  		    const struct intel_hdcp_shim *hdcp_shim);
> >  int intel_hdcp_enable(struct intel_connector *connector,
> >  		      const struct intel_crtc_state *pipe_config, u8 content_type);
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > index f58469226694..0788de04711b 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > @@ -3302,7 +3302,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *dig_port,
> >  	intel_hdmi->attached_connector = intel_connector;
> >  
> >  	if (is_hdcp_supported(dev_priv, port)) {
> > -		int ret = intel_hdcp_init(intel_connector, port,
> > +		int ret = intel_hdcp_init(intel_connector, dig_port,
> >  					  &intel_hdmi_hdcp_shim);
> >  		if (ret)
> >  			drm_dbg_kms(&dev_priv->drm,
> > -- 
> > 2.26.2
> >