| Message ID | 20201210062640.11783-9-anshuman.gupta@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | HDCP 2.2 and HDCP 1.4 Gen12 DP MST support | expand |
On 2020-12-10 at 11:56:30 +0530, Anshuman Gupta wrote: > Enable HDCP 1.4 DP MST stream encryption. IMHO tile of "Configure HDCP1.4 MST steram encryption status" would suit more. But i leave that to your call. > > Enable stream encryption once encryption is enabled on > the DP transport driving the link for each stream which > has requested encryption. > > Disable stream encryption for each stream that no longer > requires encryption before disabling HDCP encryption on > the link. > > v2: > - Added debug print for stream encryption. > - Disable the hdcp on port after disabling last stream > encryption. > v3: > - Cosmetic change, removed the value less comment. [Uma] > v4: > - Split the Gen12 HDCP enablement patch. [Ram] > - Add connector details in drm_err. > v5: > - uniformity for connector detail in DMESG. [Ram] > - comments improvement. [Ram] > Patch LGTM. Reviewed-by: Ramalingam C <ramalingam.c@intel.com> > Cc: Ramalingam C <ramalingam.c@intel.com> > Reviewed-by: Uma Shankar <uma.shankar@intel.com> > Tested-by: Karthik B S <karthik.b.s@intel.com> > Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> > --- > drivers/gpu/drm/i915/display/intel_hdcp.c | 38 +++++++++++++++-------- > 1 file changed, 25 insertions(+), 13 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c > index 6e6465b4ecfa..fce444d69521 100644 > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c > @@ -766,10 +766,17 @@ static int intel_hdcp_auth(struct intel_connector *connector) > return -ETIMEDOUT; > } > > - /* > - * XXX: If we have MST-connected devices, we need to enable encryption > - * on those as well. > - */ > + /* DP MST Auth Part 1 Step 2.a and Step 2.b */ > + if (shim->stream_encryption) { > + ret = shim->stream_encryption(connector, true); > + if (ret) { > + drm_err(&dev_priv->drm, "[%s:%d] Failed to enable HDCP 1.4 stream enc\n", > + connector->base.name, connector->base.base.id); > + return ret; > + } > + drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encrypted\n", > + transcoder_name(hdcp->stream_transcoder)); > + } > > if (repeater_present) > return intel_hdcp_auth_downstream(connector); > @@ -791,18 +798,23 @@ static int _intel_hdcp_disable(struct intel_connector *connector) > drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n", > connector->base.name, connector->base.base.id); > > + if (hdcp->shim->stream_encryption) { > + ret = hdcp->shim->stream_encryption(connector, false); > + if (ret) { > + drm_err(&dev_priv->drm, "[%s:%d] Failed to disable HDCP 1.4 stream enc\n", > + connector->base.name, connector->base.base.id); > + return ret; > + } > + drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encryption disabled\n", > + transcoder_name(hdcp->stream_transcoder)); > + } > + > /* > - * If there are other connectors on this port using HDCP, don't disable > - * it. Instead, toggle the HDCP signalling off on that particular > - * connector/pipe and exit. > + * If there are other connectors on this port using HDCP, don't disable it > + * until it disabled HDCP encryption for all connectors in MST topology. > */ > - if (dig_port->num_hdcp_streams > 0) { > - ret = hdcp->shim->toggle_signalling(dig_port, > - cpu_transcoder, false); > - if (ret) > - DRM_ERROR("Failed to disable HDCP signalling\n"); > + if (dig_port->num_hdcp_streams > 0) > return ret; > - } > > hdcp->hdcp_encrypted = false; > intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0); > -- > 2.26.2 >
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index 6e6465b4ecfa..fce444d69521 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -766,10 +766,17 @@ static int intel_hdcp_auth(struct intel_connector *connector) return -ETIMEDOUT; } - /* - * XXX: If we have MST-connected devices, we need to enable encryption - * on those as well. - */ + /* DP MST Auth Part 1 Step 2.a and Step 2.b */ + if (shim->stream_encryption) { + ret = shim->stream_encryption(connector, true); + if (ret) { + drm_err(&dev_priv->drm, "[%s:%d] Failed to enable HDCP 1.4 stream enc\n", + connector->base.name, connector->base.base.id); + return ret; + } + drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encrypted\n", + transcoder_name(hdcp->stream_transcoder)); + } if (repeater_present) return intel_hdcp_auth_downstream(connector); @@ -791,18 +798,23 @@ static int _intel_hdcp_disable(struct intel_connector *connector) drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n", connector->base.name, connector->base.base.id); + if (hdcp->shim->stream_encryption) { + ret = hdcp->shim->stream_encryption(connector, false); + if (ret) { + drm_err(&dev_priv->drm, "[%s:%d] Failed to disable HDCP 1.4 stream enc\n", + connector->base.name, connector->base.base.id); + return ret; + } + drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encryption disabled\n", + transcoder_name(hdcp->stream_transcoder)); + } + /* - * If there are other connectors on this port using HDCP, don't disable - * it. Instead, toggle the HDCP signalling off on that particular - * connector/pipe and exit. + * If there are other connectors on this port using HDCP, don't disable it + * until it disabled HDCP encryption for all connectors in MST topology. */ - if (dig_port->num_hdcp_streams > 0) { - ret = hdcp->shim->toggle_signalling(dig_port, - cpu_transcoder, false); - if (ret) - DRM_ERROR("Failed to disable HDCP signalling\n"); + if (dig_port->num_hdcp_streams > 0) return ret; - } hdcp->hdcp_encrypted = false; intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0);