On 2019-08-27 at 10:49:25 +0530, Sharma, Shashank wrote:
> Regards
>
> Shashank
>
> On 8/22/2019 8:49 PM, Ramalingam C wrote:
> > 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]
> >
> > Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> > Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> > ---
> > .../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 | 49 ++++++++++++++++++-
> > drivers/gpu/drm/i915/display/intel_hdcp.h | 3 ++
> > drivers/gpu/drm/i915/display/intel_hdmi.c | 3 ++
> > 5 files changed, 64 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 449abaea619f..fc85b3e284d4 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;
> attached_transcoder to be inline with MEI counterpart of the code ?
This is needed so that we can use this to get the offset of register.
Need not be inline with MEI.
> > };
> > struct intel_connector {
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> > index 921ad0a2f7ba..ba5317d56da7 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > @@ -2244,6 +2244,9 @@ 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 534832f435dc..1e5548833e8f 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -1762,13 +1762,60 @@ 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);
> Again, as this is in context of HDCP, we should not entertain transcoders
> below. Or we should move this function in a more generic file like
> intel_display.c or intel_ddi.c
This is specific to hdcp. So let it be here. We will fill invalid
TRANSCODER for all non HDCO capable transcoders. Hope that works for
you.
> > + case TRANSCODER_EDP:
> > + return MEI_TC_EDP;
> > + case TRANSCODER_DSI_0:
> > + return MEI_TC_DSI0;
> > + case TRANSCODER_DSI_1:
> > + return MEI_TC_DSI1;
> > + default:
> > + 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) {
> Ah, so this is the gen_check which I was talking about in previous patch :-)
> > + 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;
> > + struct intel_crtc *crtc;
> > +
> > + if (INTEL_GEN(dev_priv) < 12) {
> > + data->fw_ddi =
> > + intel_get_mei_fw_ddi_index(connector->encoder->port);
> > + } else {
> > + crtc = to_intel_crtc(connector->base.state->crtc);
> > + if (crtc) {
> > + hdcp->cpu_transcoder = crtc->config->cpu_transcoder;
> > + data->fw_tc = intel_get_mei_fw_tc(hdcp->cpu_transcoder);
> > + }
> > + data->fw_ddi = intel_get_mei_fw_ddi_index(PORT_NONE);
>
> I dint understand this, why PORT_NONE ?
ME FW API expects invalid PORT for GEN12+. Hence we assign the required
value here. May be I will add that info as doc here.
-Ram
>
> - Shashank
>
> > + }
> > - data->fw_ddi = intel_get_mei_fw_ddi_index(connector->encoder->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;
> > }
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