drm/i915/hdcp: update current transcoder into intel_hdcp

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]
v5:
  Few comments are improvised [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190828164216.405-6-ramalingam.c@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 96514dc..61277a8 100644 (file)
--- 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 c9986c7..aaa9099 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2261,6 +2261,9 @@ 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 e8b04cc..edcec64 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -1764,13 +1764,58 @@ 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)
+               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 zero(INVALID PORT index).
+                */
+               data->fw_ddi = MEI_DDI_INVALID_PORT;
+
+       /*
+        * As associated transcoder is set and modified at modeset, here fw_tc
+        * is initialized to zero (invalid transcoder index). This will be
+        * retained for <Gen12 forever.
+        */
+       data->fw_tc = MEI_INVALID_TRANSCODER;
+
        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 59a2b40..41c1053 100644 (file)
--- 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 e02f0fa..6e9bb6b 100644 (file)
--- 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;
 }