On 2020-02-06 at 20:34:42 +0530, Anshuman Gupta wrote:
> 1B-10 HDCP Comp test verifies that source DUT reattempts
> Content Stream Management following a failure of Content
> Stream Management, 1B-10 test fail if source DUT tries
> reauthentication following a Content Stream Management
> failure.
> Fixing this broken test.
We could explain what we do in brief?
>
> Cc: Ramalingam C <[email protected]>
> Signed-off-by: Anshuman Gupta <[email protected]>
> ---
> .../drm/i915/display/intel_display_types.h | 3 ++
> drivers/gpu/drm/i915/display/intel_hdcp.c | 32 ++++++++++++++++---
> 2 files changed, 31 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 2ae540e986ba..9232c4e0e42e 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -363,6 +363,9 @@ struct intel_hdcp {
> /* Flag indicate if it is a first ReceiverID_List msg after AKE_Init */
> bool first_recvid_msg;
>
> + /* Flag indicate whether reauth retries req */
> + bool reauth_req;
Personally I would try to avoid extra flags here. See if you could.
> +
> /*
> * Content Stream Type defined by content owner. TYPE0(0x0) content can
> * flow in the link protected by HDCP2.2 or HDCP1.4, where as TYPE1(0x1)
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 3e24a6df503a..ed523de20eac 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -1507,13 +1507,35 @@ int hdcp2_authenticate_repeater_topology(struct
> intel_connector *connector)
>
> static int hdcp2_authenticate_repeater(struct intel_connector *connector)
> {
> - int ret;
> + int ret, i, tries = 3;
> + struct intel_hdcp *hdcp = &connector->hdcp;
> + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
Preferred to sort the lengthiest line first.
>
> ret = hdcp2_authenticate_repeater_topology(connector);
> if (ret < 0)
> return ret;
>
> - return hdcp2_propagate_stream_management_info(connector);
> + /*
> + * HDCP 2.2 HDCP Spec Stream Managemnt pass/fail transition
> + * to HDCP authticate state i.e. A9->A5.
> + * if it fails, retry for stream managemnt again and skip the reauth.
> + */
> + for (i = 0; i < tries; i++) {
> + ret = hdcp2_propagate_stream_management_info(connector);
> + if (!ret) {
> + hdcp->reauth_req = true;
this is not required. hence {}.
> + break;
> + }
> +
> + hdcp->seq_num_m++;
> + drm_dbg_kms(&dev_priv->drm, "HDCP2.2 stream management %d of %d
> Failed.(%d)\n",
This can be wrapped to 80char without any loss of readability.
-Ram
> + i + 1, tries, ret);
> + }
> +
> + if (ret)
> + hdcp->reauth_req = false;
> +
> + return ret;
> }
>
> static int hdcp2_authenticate_sink(struct intel_connector *connector)
> @@ -1642,10 +1664,11 @@ static int hdcp2_disable_encryption(struct
> intel_connector *connector)
> static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
> {
> int ret, i, tries = 3;
> + struct intel_hdcp *hdcp = &connector->hdcp;
>
> for (i = 0; i < tries; i++) {
> ret = hdcp2_authenticate_sink(connector);
> - if (!ret)
> + if (!ret || !hdcp->reauth_req)
> break;
>
> /* Clearing the mei hdcp session */
> @@ -1655,7 +1678,7 @@ 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.
> @@ -1681,6 +1704,7 @@ static int _intel_hdcp2_enable(struct intel_connector
> *connector)
> connector->base.name, connector->base.base.id,
> hdcp->content_type);
>
> + hdcp->reauth_req = true;
> ret = hdcp2_authenticate_and_encrypt(connector);
> if (ret) {
> DRM_DEBUG_KMS("HDCP2 Type%d Enabling Failed. (%d)\n",
> --
> 2.24.0
>
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