From: Ramalingam C <ramalingam.c@intel.com>
To: intel-gfx <intel-gfx@lists.freedesktop.org>,
dri-devel <dri-devel@lists.freedesktop.org>
Subject: [Intel-gfx] [PATCH v2 3/5] drm/i915: terminate reauth at stream management failure
Date: Wed, 12 Feb 2020 15:59:40 +0530 [thread overview]
Message-ID: <20200212102942.26568-4-ramalingam.c@intel.com> (raw)
In-Reply-To: <20200212102942.26568-1-ramalingam.c@intel.com>
As per the HDCP2.2 compliance test 1B-10 expectation, when stream
management for a repeater fails, we retry thrice and when it fails
in all retries, HDCP2.2 reauthentication aborted at kernel.
v2:
seq_num_m++ is extended for steam management failures too.[Anshuman]
v3:
use drm_dbg_kms instead of DRM_DEBUG_KMS [Anshuman]
v4:
dev_priv is used as i915 [JaniN]
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
drivers/gpu/drm/i915/display/intel_hdcp.c | 75 ++++++++++++++---------
1 file changed, 46 insertions(+), 29 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 30e0a3aa9d57..b24d12efae0a 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;
@@ -1406,28 +1406,25 @@ int hdcp2_propagate_stream_management_info(struct intel_connector *connector)
ret = shim->write_2_2_msg(intel_dig_port, &msgs.stream_manage,
sizeof(msgs.stream_manage));
if (ret < 0)
- return ret;
+ goto err_exit;
ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_REP_STREAM_READY,
&msgs.stream_ready, sizeof(msgs.stream_ready));
if (ret < 0)
- return ret;
+ goto err_exit;
hdcp->port_data.seq_num_m = hdcp->seq_num_m;
hdcp->port_data.streams[0].stream_type = hdcp->content_type;
-
ret = hdcp2_verify_mprime(connector, &msgs.stream_ready);
- if (ret < 0)
- return ret;
+err_exit:
hdcp->seq_num_m++;
-
if (hdcp->seq_num_m > HDCP_2_2_SEQ_NUM_MAX) {
DRM_DEBUG_KMS("seq_num_m roll over.\n");
- return -1;
+ ret = -1;
}
- return 0;
+ return ret;
}
static
@@ -1492,17 +1489,6 @@ 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 +1523,13 @@ 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 +1607,50 @@ static int hdcp2_disable_encryption(struct intel_connector *connector)
return ret;
}
+static int
+hdcp2_propagate_stream_management_info(struct intel_connector *connector)
+{
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
+ 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;
+
+ drm_dbg_kms(&i915->drm,
+ "HDCP2 stream management %d of %d Failed.(%d)\n",
+ i + 1, tries, ret);
+ }
+
+ return ret;
+}
+
static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
{
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
+ 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);
+ if (!ret) {
+ hdcp->port_data.streams[0].stream_type =
+ hdcp->content_type;
+ ret = hdcp2_authenticate_port(connector);
+ if (!ret)
+ break;
+ } else {
+ drm_dbg_kms(&i915->drm,
+ "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 +1659,7 @@ 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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next prev parent reply other threads:[~2020-02-12 10:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 10:29 [Intel-gfx] [PATCH v2 0/5] HDCP misc Ramalingam C
2020-02-12 10:29 ` [Intel-gfx] [PATCH v2 1/5] drm/hdcp: optimizing the srm handling Ramalingam C
2020-02-18 15:43 ` Sean Paul
2020-02-12 10:29 ` [Intel-gfx] [PATCH v2 2/5] drm/hdcp: fix DRM_HDCP_2_KSV_COUNT_2_LSBITS Ramalingam C
2020-02-13 11:37 ` Anshuman Gupta
2020-02-12 10:29 ` Ramalingam C [this message]
2020-02-13 8:51 ` [Intel-gfx] [PATCH v2 3/5] drm/i915: terminate reauth at stream management failure Anshuman Gupta
2020-02-18 15:34 ` Sean Paul
2020-02-12 10:29 ` [Intel-gfx] [PATCH v2 4/5] drm/i915: dont retry stream management at seq_num_m roll over Ramalingam C
2020-02-13 10:37 ` Anshuman Gupta
2020-02-18 15:40 ` Sean Paul
2020-02-12 10:29 ` [Intel-gfx] [PATCH v2 5/5] drm/i915/hdcp: conversion to struct drm_device based logging macros Ramalingam C
2020-02-12 11:31 ` Jani Nikula
2020-02-12 11:39 ` Ramalingam C
2020-02-13 0:27 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for HDCP misc (rev2) Patchwork
2020-02-13 0:53 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-02-15 23:32 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2020-03-04 1:58 ` [Intel-gfx] [PATCH v2 0/5] HDCP misc Ramalingam C
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