RE: [PATCH v3 09/16] drm/i915/hdcp: Encapsulate hdcp_port_data to dig_port

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> -----Original Message-----
> From: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> Sent: Friday, October 23, 2020 5:51 PM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: seanpaul@xxxxxxxxxxxx; Nikula, Jani <jani.nikula@xxxxxxxxx>; C,
> Ramalingam <ramalingam.c@xxxxxxxxx>; Li, Juston <juston.li@xxxxxxxxx>;
> Shankar, Uma <uma.shankar@xxxxxxxxx>; Gupta, Anshuman
> <anshuman.gupta@xxxxxxxxx>
> Subject: [PATCH v3 09/16] drm/i915/hdcp: Encapsulate hdcp_port_data to
> dig_port
> 
> hdcp_port_data is specific to a port on which HDCP encryption is getting
> enabled, so encapsulate it to intel_digital_port.
> This will be required to enable HDCP 2.2 stream encryption.

Looks Good to me.
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>

> Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/display/intel_ddi.c      |  2 +
>  .../drm/i915/display/intel_display_types.h    |  5 +-
>  drivers/gpu/drm/i915/display/intel_hdcp.c     | 56 +++++++++++--------
>  3 files changed, 39 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index fbeffdfd1a0d..a46ba4e6a835 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -4746,6 +4746,8 @@ static void intel_ddi_encoder_destroy(struct
> drm_encoder *encoder)
>  	intel_dp_encoder_flush_work(encoder);
> 
>  	drm_encoder_cleanup(encoder);
> +	if (dig_port)
> +		kfree(dig_port->port_data.streams);
>  	kfree(dig_port);
>  }
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 59b8fc21e3e8..749c3a7e0b45 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -402,7 +402,6 @@ struct intel_hdcp {
>  	 * content can flow only through a link protected by HDCP2.2.
>  	 */
>  	u8 content_type;
> -	struct hdcp_port_data port_data;
> 
>  	bool is_paired;
>  	bool is_repeater;
> @@ -1446,10 +1445,12 @@ struct intel_digital_port {
>  	enum phy_fia tc_phy_fia;
>  	u8 tc_phy_fia_idx;
> 
> -	/* protects num_hdcp_streams reference count */
> +	/* protects num_hdcp_streams reference count, port_data */
>  	struct mutex hdcp_mutex;
>  	/* the number of pipes using HDCP signalling out of this port */
>  	unsigned int num_hdcp_streams;
> +	/* HDCP port data need to pass to security f/w */
> +	struct hdcp_port_data port_data;
> 
>  	void (*write_infoframe)(struct intel_encoder *encoder,
>  				const struct intel_crtc_state *crtc_state, diff --git
> a/drivers/gpu/drm/i915/display/intel_hdcp.c
> b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 10770bf0e85e..207fa17129ae 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -15,6 +15,7 @@
>  #include <drm/drm_hdcp.h>
>  #include <drm/i915_component.h>
> 
> +#include "i915_drv.h"
>  #include "i915_reg.h"
>  #include "intel_display_power.h"
>  #include "intel_display_types.h"
> @@ -1031,7 +1032,8 @@ static int
>  hdcp2_prepare_ake_init(struct intel_connector *connector,
>  		       struct hdcp2_ake_init *ake_data)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1060,7 +1062,8 @@ hdcp2_verify_rx_cert_prepare_km(struct
> intel_connector *connector,
>  				struct hdcp2_ake_no_stored_km *ek_pub_km,
>  				size_t *msg_sz)
>  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1087,7 +1090,8 @@ hdcp2_verify_rx_cert_prepare_km(struct
> intel_connector *connector,  static int hdcp2_verify_hprime(struct
> intel_connector *connector,
>  			       struct hdcp2_ake_send_hprime *rx_hprime)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1112,7 +1116,8 @@ static int
>  hdcp2_store_pairing_info(struct intel_connector *connector,
>  			 struct hdcp2_ake_send_pairing_info *pairing_info)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1138,7 +1143,8 @@ static int
>  hdcp2_prepare_lc_init(struct intel_connector *connector,
>  		      struct hdcp2_lc_init *lc_init)
>  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1164,7 +1170,8 @@ static int
>  hdcp2_verify_lprime(struct intel_connector *connector,
>  		    struct hdcp2_lc_send_lprime *rx_lprime)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1189,7 +1196,8 @@ hdcp2_verify_lprime(struct intel_connector
> *connector,  static int hdcp2_prepare_skey(struct intel_connector *connector,
>  			      struct hdcp2_ske_send_eks *ske_data)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1217,7 +1225,8 @@ hdcp2_verify_rep_topology_prepare_ack(struct
> intel_connector *connector,
>  								*rep_topology,
>  				      struct hdcp2_rep_send_ack *rep_send_ack)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1245,7 +1254,8 @@ static int
>  hdcp2_verify_mprime(struct intel_connector *connector,
>  		    struct hdcp2_rep_stream_ready *stream_ready)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1268,7 +1278,8 @@ hdcp2_verify_mprime(struct intel_connector
> *connector,
> 
>  static int hdcp2_authenticate_port(struct intel_connector *connector)  {
> -	struct hdcp_port_data *data = &connector->hdcp.port_data;
> +	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1292,6 +1303,7 @@ static int hdcp2_authenticate_port(struct
> intel_connector *connector)
> 
>  static int hdcp2_close_mei_session(struct intel_connector *connector)  {
> +	struct intel_digital_port *dig_port =
> +intel_attached_dig_port(connector);
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct i915_hdcp_comp_master *comp;
>  	int ret;
> @@ -1305,7 +1317,7 @@ static int hdcp2_close_mei_session(struct
> intel_connector *connector)
>  	}
> 
>  	ret = comp->ops->close_hdcp_session(comp->mei_dev,
> -					     &connector->hdcp.port_data);
> +					     &dig_port->port_data);
>  	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> 
>  	return ret;
> @@ -1498,8 +1510,9 @@ int
> _hdcp2_propagate_stream_management_info(struct intel_connector
> *connector)
>  	if (ret < 0)
>  		goto out;
> 
> -	hdcp->port_data.seq_num_m = hdcp->seq_num_m;
> -	hdcp->port_data.streams[0].stream_type = hdcp->content_type;
> +	dig_port->port_data.seq_num_m = hdcp->seq_num_m;
> +	dig_port->port_data.streams[0].stream_type = hdcp->content_type;
> +
>  	ret = hdcp2_verify_mprime(connector, &msgs.stream_ready);
> 
>  out:
> @@ -1731,7 +1744,9 @@ hdcp2_propagate_stream_management_info(struct
> intel_connector *connector)
> 
>  static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)  {
> +	struct intel_digital_port *dig_port =
> +intel_attached_dig_port(connector);
>  	struct drm_i915_private *i915 = to_i915(connector->base.dev);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	struct intel_hdcp *hdcp = &connector->hdcp;
>  	int ret, i, tries = 3;
> 
> @@ -1745,8 +1760,7 @@ static int hdcp2_authenticate_and_encrypt(struct
> intel_connector *connector)
>  					    ret);
>  				break;
>  			}
> -			hdcp->port_data.streams[0].stream_type =
> -							hdcp->content_type;
> +			data->streams[0].stream_type = hdcp->content_type;
>  			ret = hdcp2_authenticate_port(connector);
>  			if (!ret)
>  				break;
> @@ -1989,8 +2003,8 @@ static int initialize_hdcp_port_data(struct
> intel_connector *connector,
>  				     const struct intel_hdcp_shim *shim)  {
>  	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> +	struct hdcp_port_data *data = &dig_port->port_data;
>  	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)
> @@ -2012,16 +2026,15 @@ static int initialize_hdcp_port_data(struct
> intel_connector *connector,
>  	data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
>  	data->protocol = (u8)shim->protocol;
> 
> -	data->k = 1;
>  	if (!data->streams)
> -		data->streams = kcalloc(data->k,
> +		data->streams = kcalloc(INTEL_NUM_PIPES(dev_priv),
>  					sizeof(struct hdcp2_streamid_type),
>  					GFP_KERNEL);
>  	if (!data->streams) {
>  		drm_err(&dev_priv->drm, "Out of Memory\n");
>  		return -ENOMEM;
>  	}
> -
> +	/* For SST */
>  	data->streams[0].stream_id = 0;
>  	data->streams[0].stream_type = hdcp->content_type;
> 
> @@ -2100,7 +2113,7 @@ int intel_hdcp_init(struct intel_connector *connector,
>  							 hdcp-
> >hdcp2_supported);
>  	if (ret) {
>  		hdcp->hdcp2_supported = false;
> -		kfree(hdcp->port_data.streams);
> +		kfree(dig_port->port_data.streams);
>  		return ret;
>  	}
> 
> @@ -2140,7 +2153,7 @@ int intel_hdcp_enable(struct intel_connector
> *connector,
>  	}
> 
>  	if (INTEL_GEN(dev_priv) >= 12)
> -		hdcp->port_data.fw_tc = intel_get_mei_fw_tc(hdcp-
> >cpu_transcoder);
> +		dig_port->port_data.fw_tc =
> +intel_get_mei_fw_tc(hdcp->cpu_transcoder);
> 
>  	/*
>  	 * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
> @@ -2307,7 +2320,6 @@ void intel_hdcp_cleanup(struct intel_connector
> *connector)
>  	drm_WARN_ON(connector->base.dev, work_pending(&hdcp-
> >prop_work));
> 
>  	mutex_lock(&hdcp->mutex);
> -	kfree(hdcp->port_data.streams);
>  	hdcp->shim = NULL;
>  	mutex_unlock(&hdcp->mutex);
>  }
> --
> 2.26.2

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