Enable HDCP 2.2 over DP MST.
Cc: Ramalingam C ramalingam.c@intel.com Signed-off-by: Anshuman Gupta anshuman.gupta@intel.com --- drivers/gpu/drm/i915/display/intel_hdcp.c | 46 ++++++++++++++++++++++- 1 file changed, 44 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index b5e6bcf800aa..5f1fadbc5a10 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -1696,6 +1696,32 @@ static int hdcp2_authenticate_sink(struct intel_connector *connector) return ret; }
+static int hdcp2_enable_stream_encryption(struct intel_connector *connector) +{ + struct intel_digital_port *dig_port = intel_attached_dig_port(connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_hdcp *hdcp = &connector->hdcp; + enum transcoder cpu_transcoder = hdcp->cpu_transcoder; + enum port port = dig_port->base.port; + int ret = 0; + + if (!(intel_de_read(dev_priv, HDCP2_STATUS(dev_priv, cpu_transcoder, port)) & + LINK_ENCRYPTION_STATUS)) { + drm_err(&dev_priv->drm, "HDCP 2.2 Link is not encrypted\n"); + return -EPERM; + } + + if (hdcp->shim->stream_2_2_encryption) { + ret = hdcp->shim->stream_2_2_encryption(dig_port, true); + if (ret) { + drm_err(&dev_priv->drm, "Failed to enable HDCP 2.2 stream enc\n"); + return ret; + } + } + + return ret; +} + static int hdcp2_enable_encryption(struct intel_connector *connector) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); @@ -1834,7 +1860,7 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) drm_dbg_kms(&i915->drm, "Port deauth failed.\n"); }
- if (!ret) { + if (!ret && !dig_port->port_auth) { /* * Ensuring the required 200mSec min time interval between * Session Key Exchange and encryption. @@ -1849,6 +1875,8 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) } }
+ ret = hdcp2_enable_stream_encryption(connector); + return ret; }
@@ -1893,11 +1921,23 @@ static int _intel_hdcp2_disable(struct intel_connector *connector) struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct hdcp_port_data *data = &dig_port->port_data; + struct intel_hdcp *hdcp = &connector->hdcp; int ret;
drm_dbg_kms(&i915->drm, "[%s:%d] HDCP2.2 is being Disabled\n", connector->base.name, connector->base.base.id);
+ if (hdcp->shim->stream_2_2_encryption) { + ret = hdcp->shim->stream_2_2_encryption(dig_port, false); + if (ret) { + drm_err(&i915->drm, "Failed to disable HDCP 2.2 stream enc\n"); + return ret; + } + } + + if (dig_port->num_hdcp_streams > 0) + return ret; + ret = hdcp2_disable_encryption(connector);
if (hdcp2_deauthenticate_port(connector) < 0) @@ -1921,6 +1961,7 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) int ret = 0;
mutex_lock(&hdcp->mutex); + mutex_lock(&dig_port->hdcp_mutex); cpu_transcoder = hdcp->cpu_transcoder;
/* hdcp2_check_link is expected only when HDCP2.2 is Enabled */ @@ -1998,6 +2039,7 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) }
out: + mutex_unlock(&dig_port->hdcp_mutex); mutex_unlock(&hdcp->mutex); return ret; } @@ -2179,7 +2221,7 @@ int intel_hdcp_init(struct intel_connector *connector, if (!shim) return -EINVAL;
- if (is_hdcp2_supported(dev_priv) && !connector->mst_port) + if (is_hdcp2_supported(dev_priv)) intel_hdcp2_init(connector, dig_port, shim);
ret =