Implements a sequence of enabling and disabling the HDCP2.2 (auth and encryption).
v2: Rebased.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/gpu/drm/i915/intel_hdcp.c | 75 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c index 38cecf533cb9..41915d626d20 100644 --- a/drivers/gpu/drm/i915/intel_hdcp.c +++ b/drivers/gpu/drm/i915/intel_hdcp.c @@ -21,6 +21,9 @@ #define HDCP2_LC_RETRY_CNT 3 #define TIME_FOR_ENCRYPT_STATUS_CHANGE 32
+static int _intel_hdcp2_enable(struct intel_connector *connector); +static int _intel_hdcp2_disable(struct intel_connector *connector); + static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port, const struct intel_hdcp_shim *shim) { @@ -1384,3 +1387,75 @@ static int hdcp2_disable_encryption(struct intel_connector *connector)
return ret; } + +static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) +{ + int ret, i, tries = 3; + + for (i = 0; i < tries; i++) { + ret = hdcp2_authenticate_sink(connector); + if (!ret) + break; + + /* Clearing the mei hdcp session */ + hdcp2_deauthenticate_port(&connector->hdcp); + DRM_DEBUG_KMS("HDCP2.2 Auth %d of %d Failed.(%d)\n", + i + 1, tries, ret); + } + + if (i != tries) { + + /* + * Ensuring the required 200mSec min time interval between + * Session Key Exchange and encryption. + */ + msleep(HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN); + ret = hdcp2_enable_encryption(connector); + if (ret < 0) { + DRM_DEBUG_KMS("Encryption Enable Failed.(%d)\n", ret); + hdcp2_deauthenticate_port(&connector->hdcp); + } + } + + return ret; +} + +static int _intel_hdcp2_disable(struct intel_connector *connector) +{ + int ret; + + DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being Disabled\n", + connector->base.name, connector->base.base.id); + + ret = hdcp2_disable_encryption(connector); + + hdcp2_deauthenticate_port(&connector->hdcp); + + return ret; +} + +static int _intel_hdcp2_enable(struct intel_connector *connector) +{ + struct intel_hdcp *hdcp = &connector->hdcp; + int ret; + + DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being enabled. Type: %d\n", + connector->base.name, connector->base.base.id, + hdcp->content_type); + + ret = hdcp2_authenticate_and_encrypt(connector); + if (ret) { + DRM_ERROR("HDCP2 Type%d Enabling Failed. (%d)\n", + hdcp->content_type, ret); + return ret; + } + + DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is enabled. Type %d\n", + connector->base.name, connector->base.base.id, + hdcp->content_type); + + hdcp->hdcp_value = DRM_MODE_CONTENT_PROTECTION_ENABLED; + schedule_work(&hdcp->hdcp_prop_work); + + return 0; +}