> -----Original Message-----
> From: Anshuman Gupta <anshuman.gu...@intel.com>
> Sent: Friday, October 23, 2020 5:51 PM
> To: intel-gfx@lists.freedesktop.org; dri-de...@lists.freedesktop.org
> Cc: seanp...@chromium.org; Nikula, Jani <jani.nik...@intel.com>; C,
> Ramalingam <ramalinga...@intel.com>; Li, Juston <juston...@intel.com>;
> Shankar, Uma <uma.shan...@intel.com>; Gupta, Anshuman
> <anshuman.gu...@intel.com>
> Subject: [PATCH v3 04/16] drm/i915/hdcp: DP MST transcoder for link and stream
>
> Gen12 has H/W delta with respect to HDCP{1.x,2.x} display engine instances
> lies
> in Transcoder instead of DDI as in Gen11.
>
> This requires hdcp driver to use mst_master_transcoder for link authentication
> and stream transcoder for stream encryption separately.
>
> This will be used for both HDCP 1.4 and HDCP 2.2 over DP MST on Gen12.
Looks Good to me.
Reviewed-by: Uma Shankar <uma.shan...@intel.com>
> Cc: Ramalingam C <ramalinga...@intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gu...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 2 +-
> .../gpu/drm/i915/display/intel_display_types.h | 2 ++
> drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 +-
> drivers/gpu/drm/i915/display/intel_hdcp.c | 15 +++++++++++----
> drivers/gpu/drm/i915/display/intel_hdcp.h | 2 +-
> 5 files changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 09811be08cfe..bf8730267cfd 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -4059,7 +4059,7 @@ static void intel_enable_ddi(struct intel_atomic_state
> *state,
> if (conn_state->content_protection ==
> DRM_MODE_CONTENT_PROTECTION_DESIRED)
> intel_hdcp_enable(to_intel_connector(conn_state->connector),
> - crtc_state->cpu_transcoder,
> + crtc_state,
> (u8)conn_state->hdcp_content_type);
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index f6f0626649e0..c47124a679b6 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -432,6 +432,8 @@ struct intel_hdcp {
> * Hence caching the transcoder here.
> */
> enum transcoder cpu_transcoder;
> + /* Only used for DP MST stream encryption */
> + enum transcoder stream_transcoder;
> };
>
> struct intel_connector {
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index c8fcec4d0788..16865b200062 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -568,7 +568,7 @@ static void intel_mst_enable_dp(struct
> intel_atomic_state *state,
> if (conn_state->content_protection ==
> DRM_MODE_CONTENT_PROTECTION_DESIRED)
> intel_hdcp_enable(to_intel_connector(conn_state->connector),
> - pipe_config->cpu_transcoder,
> + pipe_config,
> (u8)conn_state->hdcp_content_type);
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 42cf91cf4f20..a9b652c6e742 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -2095,7 +2095,7 @@ int intel_hdcp_init(struct intel_connector *connector,
> }
>
> int intel_hdcp_enable(struct intel_connector *connector,
> - enum transcoder cpu_transcoder, u8 content_type)
> + const struct intel_crtc_state *pipe_config, u8
> content_type)
> {
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> struct intel_digital_port *dig_port =
> intel_attached_dig_port(connector);
> @@ -2111,10 +2111,17 @@ int intel_hdcp_enable(struct intel_connector
> *connector,
> drm_WARN_ON(&dev_priv->drm,
> hdcp->value ==
> DRM_MODE_CONTENT_PROTECTION_ENABLED);
> hdcp->content_type = content_type;
> - hdcp->cpu_transcoder = cpu_transcoder;
> +
> + if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DP_MST)) {
> + hdcp->cpu_transcoder = pipe_config->mst_master_transcoder;
> + hdcp->stream_transcoder = pipe_config->cpu_transcoder;
> + } else {
> + hdcp->cpu_transcoder = pipe_config->cpu_transcoder;
> + hdcp->stream_transcoder = INVALID_TRANSCODER;
> + }
>
> if (INTEL_GEN(dev_priv) >= 12)
> - hdcp->port_data.fw_tc = intel_get_mei_fw_tc(cpu_transcoder);
> + hdcp->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
> @@ -2231,7 +2238,7 @@ void intel_hdcp_update_pipe(struct intel_atomic_state
> *state,
>
> if (desired_and_not_enabled || content_protection_type_changed)
> intel_hdcp_enable(connector,
> - crtc_state->cpu_transcoder,
> + crtc_state,
> (u8)conn_state->hdcp_content_type);
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h
> b/drivers/gpu/drm/i915/display/intel_hdcp.h
> index 1bbf5b67ed0a..bc51c1e9b481 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.h
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
> @@ -25,7 +25,7 @@ void intel_hdcp_atomic_check(struct drm_connector
> *connector, int intel_hdcp_init(struct intel_connector *connector, enum port
> port,
> const struct intel_hdcp_shim *hdcp_shim); int
> intel_hdcp_enable(struct intel_connector *connector,
> - enum transcoder cpu_transcoder, u8 content_type);
> + const struct intel_crtc_state *pipe_config, u8
> content_type);
> int intel_hdcp_disable(struct intel_connector *connector); void
> intel_hdcp_update_pipe(struct intel_atomic_state *state,
> struct intel_encoder *encoder,
> --
> 2.26.2
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