> On gen12+ platforms, HDCP HW is associated to the transcoder.
> Hence on every modeset update associated transcoder into the intel_hdcp of
> the port.
> 
> v2:
>   s/trans/cpu_transcoder [Jani]
> v3:
>   comment is added for fw_ddi init for gen12+ [Shashank]
>   only hdcp capable transcoder is translated into fw_tc [Shashank]
> v4:
>   fw_tc initialization is kept for modeset. [Tomas]
>   few extra doc is added at port_data init [Tomas]
> 
> Signed-off-by: Ramalingam C <ramalinga...@intel.com>
> Acked-by: Jani Nikula <jani.nik...@intel.com>
> ---
>  .../drm/i915/display/intel_display_types.h    |  7 +++
>  drivers/gpu/drm/i915/display/intel_dp.c       |  3 ++
>  drivers/gpu/drm/i915/display/intel_hdcp.c     | 48 ++++++++++++++++++-
>  drivers/gpu/drm/i915/display/intel_hdcp.h     |  3 ++
>  drivers/gpu/drm/i915/display/intel_hdmi.c     |  3 ++
>  5 files changed, 63 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 96514dcc7812..61277a87dbe7 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -388,6 +388,13 @@ struct intel_hdcp {
>       wait_queue_head_t cp_irq_queue;
>       atomic_t cp_irq_count;
>       int cp_irq_count_cached;
> +
> +     /*
> +      * HDCP register access for gen12+ need the transcoder associated.
> +      * Transcoder attached to the connector could be changed at modeset.
> +      * Hence caching the transcoder here.
> +      */
> +     enum transcoder cpu_transcoder;
>  };
> 
>  struct intel_connector {
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 23908da1cd5d..e8471689f785 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2248,6 +2248,9 @@ intel_dp_compute_config(struct intel_encoder
> *encoder,
> 
>       intel_psr_compute_config(intel_dp, pipe_config);
> 
> +     intel_hdcp_transcoder_config(intel_connector,
> +                                  pipe_config->cpu_transcoder);
> +
>       return 0;
>  }
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index e8b04cc8fcb1..988d675f9f69 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -1764,13 +1764,59 @@ enum mei_fw_ddi
> intel_get_mei_fw_ddi_index(enum port port)
>       }
>  }
> 
> +static inline
> +enum mei_fw_tc intel_get_mei_fw_tc(enum transcoder cpu_transcoder) {
> +     switch (cpu_transcoder) {
> +     case TRANSCODER_A ... TRANSCODER_D:
> +             return (enum mei_fw_tc)(cpu_transcoder | 0x10);
> +     default: /* eDP, DSI TRANSCODERS are non HDCP capable */
> +             return MEI_INVALID_TRANSCODER;
> +     }
> +}
> +
> +void intel_hdcp_transcoder_config(struct intel_connector *connector,
> +                               enum transcoder cpu_transcoder)
> +{
> +     struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> +     struct intel_hdcp *hdcp = &connector->hdcp;
> +
> +     if (!hdcp->shim)
> +             return;
> +
> +     if (INTEL_GEN(dev_priv) >= 12) {
> +             mutex_lock(&hdcp->mutex);
> +             hdcp->cpu_transcoder = cpu_transcoder;
> +             hdcp->port_data.fw_tc =
> intel_get_mei_fw_tc(cpu_transcoder);
> +             mutex_unlock(&hdcp->mutex);
> +     }
> +}
> +
>  static inline 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 intel_hdcp *hdcp = &connector->hdcp;
>       struct hdcp_port_data *data = &hdcp->port_data;
> 
> -     data->fw_ddi = intel_get_mei_fw_ddi_index(connector->encoder-
> >port);
> +     if (INTEL_GEN(dev_priv) < 12) {
Now you have one liners, you should drop the brackets. 
> +             data->fw_ddi =
> +                     intel_get_mei_fw_ddi_index(connector->encoder-
> >port);
> +     } else {
> +
> +             /*
> +              * As per ME FW API expectation, for GEN 12+, fw_ddi is filled
> +              * with INVALID PORT index.
> +              */
> +             data->fw_ddi = MEI_DDI_INVALID_PORT;
In your previous patch you commented that this should be '0', need to make 
comment consistent even if MEI_DDI_INVALID_PORT is 0
> +     }
> +
> +     /*
> +      * As associated transcoder is set and modified at modeset, here fw_tc
> +      * is initialized to invalid index.
> +      */
> +     data->fw_tc = MEI_INVALID_TRANSCODER;
In your previous you commented this should be '0', as for port.

> +
>       data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
>       data->protocol = (u8)shim->protocol;
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h
> b/drivers/gpu/drm/i915/display/intel_hdcp.h
> index 59a2b40405cc..41c1053d9e38 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.h
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
> @@ -16,10 +16,13 @@ struct drm_i915_private;  struct intel_connector;  struct
> intel_hdcp_shim;  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);
> +void intel_hdcp_transcoder_config(struct intel_connector *connector,
> +                               enum transcoder cpu_transcoder);
>  int intel_hdcp_init(struct intel_connector *connector,
>                   const struct intel_hdcp_shim *hdcp_shim);  int
> intel_hdcp_enable(struct intel_connector *connector, u8 content_type); diff --
> git a/drivers/gpu/drm/i915/display/intel_hdmi.c
> b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index e02f0faecf02..6e9bb6bd1ee2 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -2431,6 +2431,9 @@ int intel_hdmi_compute_config(struct intel_encoder
> *encoder,
>               return -EINVAL;
>       }
> 
> +     intel_hdcp_transcoder_config(intel_hdmi->attached_connector,
> +                                  pipe_config->cpu_transcoder);
> +
>       return 0;
>  }
> 
> --
> 2.20.1

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