On 2020-04-29 at 15:55:02 -0400, Sean Paul wrote: > From: Sean Paul <seanpaul@xxxxxxxxxxxx> > > Now that all the groundwork has been laid, we can turn on HDCP 1.4 over > MST. Everything except for toggling the HDCP signalling and HDCP 2.2 > support is the same as the DP case, so we'll re-use those callbacks > > Cc: Juston Li <juston.li@xxxxxxxxx> > Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> > Link: https://patchwork.freedesktop.org/patch/msgid/20191203173638.94919-12-sean@xxxxxxxxxx #v1 > Link: https://patchwork.freedesktop.org/patch/msgid/20191212190230.188505-13-sean@xxxxxxxxxx #v2 > Link: https://patchwork.freedesktop.org/patch/msgid/20200117193103.156821-13-sean@xxxxxxxxxx #v3 > Link: https://patchwork.freedesktop.org/patch/msgid/20200218220242.107265-15-sean@xxxxxxxxxx #v4 > Link: https://patchwork.freedesktop.org/patch/msgid/20200305201236.152307-17-sean@xxxxxxxxxx #v5 > > Changes in v2: > -Toggle HDCP from encoder disable/enable > -Don't disable HDCP on MST connector destroy, leave that for encoder > disable, just ensure the check_work routine isn't running any longer > Changes in v3: > -Place the shim in the new intel_dp_hdcp.c file (Ville) > Changes in v4: > -Actually use the mst shim for mst connections (Juston) > -Use QUERY_STREAM_ENC_STATUS MST message to verify channel is encrypted > Changes in v5: > -Add sleep on disable signalling to match hdmi delay > Changes in v6: > -Disable HDCP over MST on GEN12+ since I'm unsure how it should work and I > don't have hardware to test it > --- > drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 107 ++++++++++++++++++- > drivers/gpu/drm/i915/display/intel_dp_mst.c | 18 ++++ > 2 files changed, 124 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > index 4e3dafbea1f9..331fdb312e05 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > @@ -7,10 +7,12 @@ > */ > > #include <drm/drm_dp_helper.h> > +#include <drm/drm_dp_mst_helper.h> > #include <drm/drm_hdcp.h> > #include <drm/drm_print.h> > > #include "intel_display_types.h" > +#include "intel_ddi.h" > #include "intel_dp.h" > #include "intel_hdcp.h" > > @@ -618,6 +620,106 @@ static const struct intel_hdcp_shim intel_dp_hdcp_shim = { > .protocol = HDCP_PROTOCOL_DP, > }; > > +static int > +intel_dp_mst_hdcp_toggle_signalling(struct intel_digital_port *intel_dig_port, > + enum transcoder cpu_transcoder, > + bool enable) > +{ > + struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); > + int ret; > + > + if (!enable) > + usleep_range(6, 60); /* Bspec says >= 6us */ > + > + ret = intel_ddi_toggle_hdcp_signalling(&intel_dig_port->base, > + cpu_transcoder, enable); Sean, The bit configured here is meant for HDMI and DVI only. Ignore for DP. Thanks anshuman for pointing that out. > + if (ret) > + drm_dbg_kms(&i915->drm, "%s HDCP signalling failed (%d)\n", > + enable ? "Enable" : "Disable", ret); > + return ret; > +} > + > +static > +int intel_dp_mst_hdcp2_write_msg(struct intel_digital_port *intel_dig_port, > + void *buf, size_t size) > +{ > + return -EOPNOTSUPP; > +} > + > +static > +int intel_dp_mst_hdcp2_read_msg(struct intel_digital_port *intel_dig_port, > + u8 msg_id, void *buf, size_t size) > +{ > + return -EOPNOTSUPP; > +} > + > +static int > +intel_dp_mst_hdcp2_config_stream_type(struct intel_digital_port *intel_dig_port, > + bool is_repeater, u8 content_type) > +{ > + return -EOPNOTSUPP; > +} > + > +static > +int intel_dp_mst_hdcp2_check_link(struct intel_digital_port *intel_dig_port) > +{ > + return -EOPNOTSUPP; > +} > + > +static > +int intel_dp_mst_hdcp2_capable(struct intel_digital_port *intel_dig_port, > + bool *capable) > +{ > + *capable = false; > + return 0; > +} > + > +static > +bool intel_dp_mst_hdcp_check_link(struct intel_digital_port *intel_dig_port, > + struct intel_connector *connector) > +{ > + struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); > + struct intel_dp *intel_dp = &intel_dig_port->dp; > + struct drm_dp_query_stream_enc_status_ack_reply reply; > + int ret; > + > + if (!intel_dp_hdcp_check_link(intel_dig_port, connector)) > + return false; > + > + ret = drm_dp_send_query_stream_enc_status(&intel_dp->mst_mgr, > + connector->port, &reply); > + if (ret) { > + drm_dbg_kms(&i915->drm, > + "[CONNECTOR:%d:%s] failed QSES ret=%d\n", > + connector->base.base.id, connector->base.name, ret); > + return false; > + } > + > + return reply.auth_completed && reply.encryption_enabled; > +} > + > +static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = { > + .write_an_aksv = intel_dp_hdcp_write_an_aksv, > + .read_bksv = intel_dp_hdcp_read_bksv, > + .read_bstatus = intel_dp_hdcp_read_bstatus, > + .repeater_present = intel_dp_hdcp_repeater_present, > + .read_ri_prime = intel_dp_hdcp_read_ri_prime, > + .read_ksv_ready = intel_dp_hdcp_read_ksv_ready, > + .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo, > + .read_v_prime_part = intel_dp_hdcp_read_v_prime_part, > + .toggle_signalling = intel_dp_mst_hdcp_toggle_signalling, > + .check_link = intel_dp_mst_hdcp_check_link, > + .hdcp_capable = intel_dp_hdcp_capable, > + > + .write_2_2_msg = intel_dp_mst_hdcp2_write_msg, > + .read_2_2_msg = intel_dp_mst_hdcp2_read_msg, > + .config_stream_type = intel_dp_mst_hdcp2_config_stream_type, > + .check_2_2_link = intel_dp_mst_hdcp2_check_link, > + .hdcp_2_2_capable = intel_dp_mst_hdcp2_capable, IMO, we dont need to introduce dummy functions for HDCP2.2 on MST shim, when we are not enabling HDCP2.2 on it. At is_hdcp2_supported() just add if (connector->mst_port) return false; > + > + .protocol = HDCP_PROTOCOL_DP, > +}; > + > int intel_dp_init_hdcp(struct intel_digital_port *intel_dig_port, > struct intel_connector *intel_connector) > { > @@ -630,7 +732,10 @@ int intel_dp_init_hdcp(struct intel_digital_port *intel_dig_port, > if (!is_hdcp_supported(dev_priv, port)) > return 0; > > - if (!intel_dp_is_edp(intel_dp)) > + if (intel_connector->mst_port) > + return intel_hdcp_init(intel_connector, port, > + &intel_dp_mst_hdcp_shim); > + else if (!intel_dp_is_edp(intel_dp)) > return intel_hdcp_init(intel_connector, port, > &intel_dp_hdcp_shim); > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c > index d9dc4dc6ea92..ab24e5057c60 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c > +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c > @@ -36,6 +36,7 @@ > #include "intel_dp.h" > #include "intel_dp_mst.h" > #include "intel_dpio_phy.h" > +#include "intel_hdcp.h" > > static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, > struct intel_crtc_state *crtc_state, > @@ -332,6 +333,8 @@ static void intel_mst_disable_dp(struct intel_atomic_state *state, > drm_dbg_kms(&i915->drm, "active links %d\n", > intel_dp->active_mst_links); > > + intel_hdcp_disable(intel_mst->connector); > + > drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); > > ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); > @@ -526,6 +529,13 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state, > drm_dp_update_payload_part2(&intel_dp->mst_mgr); > if (pipe_config->has_audio) > intel_audio_codec_enable(encoder, pipe_config, conn_state); > + > + /* Enable hdcp if it's desired */ > + if (conn_state->content_protection == > + DRM_MODE_CONTENT_PROTECTION_DESIRED) > + intel_hdcp_enable(to_intel_connector(conn_state->connector), > + pipe_config->cpu_transcoder, > + (u8)conn_state->hdcp_content_type); I am afraid I am not seeing the stream level HDCP encryption set anywhere. How the userspace will indicate the streams that needs to be hdcp encrypted? Thanks, -Ram > } > > static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, > @@ -748,6 +758,14 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo > intel_attach_force_audio_property(connector); > intel_attach_broadcast_rgb_property(connector); > > + > + /* TODO: Figure out how to make HDCP work on GEN12+ */ > + if (INTEL_GEN(dev_priv) < 12) { > + ret = intel_dp_init_hdcp(intel_dig_port, intel_connector); > + if (ret) > + DRM_DEBUG_KMS("HDCP init failed, skipping.\n"); > + } > + > /* > * Reuse the prop from the SST connector because we're > * not allowed to create new props after device registration. > -- > Sean Paul, Software Engineer, Google / Chromium OS > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
