On 2020-02-10 at 22:19:50 +0530, Ramalingam C wrote:
> As per the HDCP2.2 compliance test 1B-10 expectation, when stream
> management for a repeater fails, HDCP2.2 reauthentication stops at
> kernel.
Shall i drop my patch now and continue with reviewing this patch.
one comment below.
>
> Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_hdcp.c | 55 ++++++++++++++---------
> 1 file changed, 34 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 4d1a33d13105..5ab35484da93 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -1380,7 +1380,7 @@ static int hdcp2_session_key_exchange(struct intel_connector *connector)
> }
>
> static
> -int hdcp2_propagate_stream_management_info(struct intel_connector *connector)
> +int _hdcp2_propagate_stream_management_info(struct intel_connector *connector)
> {
> struct intel_digital_port *intel_dig_port = intel_attached_dig_port(connector);
> struct intel_hdcp *hdcp = &connector->hdcp;
> @@ -1492,17 +1492,6 @@ int hdcp2_authenticate_repeater_topology(struct intel_connector *connector)
> return 0;
> }
>
> -static int hdcp2_authenticate_repeater(struct intel_connector *connector)
> -{
> - int ret;
> -
> - ret = hdcp2_authenticate_repeater_topology(connector);
> - if (ret < 0)
> - return ret;
> -
> - return hdcp2_propagate_stream_management_info(connector);
> -}
> -
> static int hdcp2_authenticate_sink(struct intel_connector *connector)
> {
> struct intel_digital_port *intel_dig_port = intel_attached_dig_port(connector);
> @@ -1537,18 +1526,13 @@ static int hdcp2_authenticate_sink(struct intel_connector *connector)
> }
>
> if (hdcp->is_repeater) {
> - ret = hdcp2_authenticate_repeater(connector);
> + ret = hdcp2_authenticate_repeater_topology(connector);
> if (ret < 0) {
> DRM_DEBUG_KMS("Repeater Auth Failed. Err: %d\n", ret);
> return ret;
> }
> }
>
> - hdcp->port_data.streams[0].stream_type = hdcp->content_type;
> - ret = hdcp2_authenticate_port(connector);
> - if (ret < 0)
> - return ret;
> -
> return ret;
> }
>
> @@ -1626,14 +1610,43 @@ static int hdcp2_disable_encryption(struct intel_connector *connector)
> return ret;
> }
>
> +static int
> +hdcp2_propagate_stream_management_info(struct intel_connector *connector)
> +{
> + int i, tries = 3, ret;
> +
> + if (!connector->hdcp.is_repeater)
> + return 0;
> +
> + for (i = 0; i < tries; i++) {
> + ret = _hdcp2_propagate_stream_management_info(connector);
> + if (!ret)
> + break;
> + }
> +
> + return ret;
> +}
> +
> static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
> {
> + struct intel_hdcp *hdcp = &connector->hdcp;
> int ret, i, tries = 3;
>
> for (i = 0; i < tries; i++) {
> ret = hdcp2_authenticate_sink(connector);
> - if (!ret)
> - break;
> + if (!ret) {
> + ret = hdcp2_propagate_stream_management_info(connector);
we need to increment seq_num_m fo every retry of stream management.
Thanks,
Anshuman Gupta.
> + if (!ret) {
> + hdcp->port_data.streams[0].stream_type =
> + hdcp->content_type;
> + ret = hdcp2_authenticate_port(connector);
> + if (!ret)
> + break;
> + } else {
> + DRM_DEBUG_KMS("HDCP2 stream management failed\n");
> + break;
> + }
> + }
>
> /* Clearing the mei hdcp session */
> DRM_DEBUG_KMS("HDCP2.2 Auth %d of %d Failed.(%d)\n",
> @@ -1642,7 +1655,7 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
> DRM_DEBUG_KMS("Port deauth failed.\n");
> }
>
> - if (i != tries) {
> + if (!ret) {
> /*
> * Ensuring the required 200mSec min time interval between
> * Session Key Exchange and encryption.
> --
> 2.20.1
>
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