diff options
| author | Ramalingam C <ramalingam.c@intel.com> | 2018-02-03 03:39:09 +0530 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2018-02-05 12:59:23 -0500 |
| commit | 6d983946513b05102e1c41ea195ce7f7a65e7047 (patch) | |
| tree | 6b021fa82f69e622c1ac2038671c94ae2b17b1ed /drivers/gpu/drm/i915/intel_hdcp.c | |
| parent | 791a98dd9bcfd214d8ef51d248f377354a9ea683 (diff) | |
drm/i915: Reauthenticate HDCP on failure
Incase of HDCP authentication failure, HDCP spec expects
reauthentication. Hence this patch adds the reauthentications
to be compliance with spec.
v2:
do-while to for loop for simplicity. [Seanpaul]
v3:
positioning the logs effectively. [Seanpaul]
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1517609350-10698-8-git-send-email-ramalingam.c@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_hdcp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_hdcp.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c index d8c0202cf0c0..14ca5d3057a7 100644 --- a/drivers/gpu/drm/i915/intel_hdcp.c +++ b/drivers/gpu/drm/i915/intel_hdcp.c @@ -575,7 +575,7 @@ static int _intel_hdcp_disable(struct intel_connector *connector) static int _intel_hdcp_enable(struct intel_connector *connector) { struct drm_i915_private *dev_priv = connector->base.dev->dev_private; - int i, ret; + int i, ret, tries = 3; DRM_DEBUG_KMS("[%s:%d] HDCP is being enabled...\n", connector->base.name, connector->base.base.id); @@ -596,17 +596,21 @@ static int _intel_hdcp_enable(struct intel_connector *connector) return ret; } - ret = intel_hdcp_auth(conn_to_dig_port(connector), - connector->hdcp_shim); - if (ret) { - DRM_ERROR("Failed to authenticate HDCP (%d)\n", ret); + /* Incase of authentication failures, HDCP spec expects reauth. */ + for (i = 0; i < tries; i++) { + ret = intel_hdcp_auth(conn_to_dig_port(connector), + connector->hdcp_shim); + if (!ret) + return 0; + + DRM_DEBUG_KMS("HDCP Auth failure (%d)\n", ret); /* Ensuring HDCP encryption and signalling are stopped. */ _intel_hdcp_disable(connector); - return ret; } - return 0; + DRM_ERROR("HDCP authentication failed (%d tries/%d)\n", tries, ret); + return ret; } static void intel_hdcp_check_work(struct work_struct *work) |