[PATCH v5 12/12] drm/i915: Populate downstream info for HDCP
Ramalingam C
ramalingam.c at intel.com
Thu Apr 18 08:58:05 UTC 2019
Implements drm blob property content_protection_downstream_info
property on HDCP capable connectors.
Downstream topology info is gathered across authentication stages
and stored in intel_hdcp. When HDCP authentication is complete,
new blob with latest downstream topology information is updated to
content_protection_downstream_info property.
v2:
%s/cp_downstream/content_protection_downstream [daniel]
v3:
%s/content_protection_downstream/hdcp_topology [daniel]
v4:
Rebased.
v5:
Rebased.
Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
drivers/gpu/drm/i915/intel_drv.h | 2 +
drivers/gpu/drm/i915/intel_hdcp.c | 73 +++++++++++++++++++++++++++----
include/drm/drm_hdcp.h | 1 +
3 files changed, 68 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a38b9cff5cd0..b998479d89e7 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -485,6 +485,8 @@ struct intel_hdcp {
wait_queue_head_t cp_irq_queue;
atomic_t cp_irq_count;
int cp_irq_count_cached;
+
+ struct hdcp_topology_info *topology_info;
};
struct intel_connector {
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 84ac23ea75af..1c75df1ccaf5 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -496,6 +496,7 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector)
{
struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
const struct intel_hdcp_shim *shim = connector->hdcp.shim;
+ struct intel_hdcp *hdcp = &connector->hdcp;
struct drm_device *dev = connector->base.dev;
u8 bstatus[2], num_downstream, *ksv_fifo;
int ret, i, tries = 3;
@@ -527,6 +528,9 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector)
if (num_downstream == 0)
return -EINVAL;
+ hdcp->topology_info->device_count = num_downstream;
+ hdcp->topology_info->depth = DRM_HDCP_DEPTH(bstatus[1]);
+
ksv_fifo = kcalloc(DRM_HDCP_KSV_LEN, num_downstream, GFP_KERNEL);
if (!ksv_fifo)
return -ENOMEM;
@@ -540,6 +544,8 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector)
return -EPERM;
}
+ memcpy(hdcp->topology_info->ksv_list, ksv_fifo,
+ num_downstream * DRM_HDCP_KSV_LEN);
/*
* When V prime mismatches, DP Spec mandates re-read of
* V prime atleast twice.
@@ -642,15 +648,20 @@ static int intel_hdcp_auth(struct intel_connector *connector)
return -EPERM;
}
+ hdcp->topology_info->ver_in_force = DRM_MODE_HDCP14_IN_FORCE;
+ memcpy(hdcp->topology_info->bksv, bksv.shim, DRM_MODE_HDCP_KSV_LEN);
+
I915_WRITE(PORT_HDCP_BKSVLO(port), bksv.reg[0]);
I915_WRITE(PORT_HDCP_BKSVHI(port), bksv.reg[1]);
ret = shim->repeater_present(intel_dig_port, &repeater_present);
if (ret)
return ret;
- if (repeater_present)
+ if (repeater_present) {
I915_WRITE(HDCP_REP_CTL,
intel_hdcp_get_repeater_ctl(intel_dig_port));
+ hdcp->topology_info->is_repeater = true;
+ }
ret = shim->toggle_signalling(intel_dig_port, true);
if (ret)
@@ -747,13 +758,18 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
return ret;
}
+ memset(hdcp->topology_info, 0, sizeof(struct hdcp_topology_info));
+
+ if (drm_connector_update_hdcp_topology_property(&connector->base,
+ connector->hdcp.topology_info))
+ DRM_ERROR("Downstream_info update failed.\n");
+
DRM_DEBUG_KMS("HDCP is disabled\n");
return 0;
}
static int _intel_hdcp_enable(struct intel_connector *connector)
{
- struct intel_hdcp *hdcp = &connector->hdcp;
struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
int i, ret, tries = 3;
@@ -780,7 +796,11 @@ static int _intel_hdcp_enable(struct intel_connector *connector)
for (i = 0; i < tries; i++) {
ret = intel_hdcp_auth(connector);
if (!ret) {
- hdcp->hdcp_encrypted = true;
+ connector->hdcp.hdcp_encrypted = true;
+ if (drm_connector_update_hdcp_topology_property(
+ &connector->base,
+ connector->hdcp.topology_info))
+ DRM_ERROR("Downstream_info update failed.\n");
return 0;
}
@@ -1216,6 +1236,12 @@ static int hdcp2_authentication_key_exchange(struct intel_connector *connector)
return -EPERM;
}
+ hdcp->topology_info->ver_in_force = DRM_MODE_HDCP22_IN_FORCE;
+ hdcp->topology_info->content_type = hdcp->content_type;
+ memcpy(hdcp->topology_info->bksv, msgs.send_cert.cert_rx.receiver_id,
+ HDCP_2_2_RECEIVER_ID_LEN);
+ hdcp->topology_info->is_repeater = hdcp->is_repeater;
+
/*
* Here msgs.no_stored_km will hold msgs corresponding to the km
* stored also.
@@ -1408,6 +1434,11 @@ int hdcp2_authenticate_repeater_topology(struct intel_connector *connector)
return -EPERM;
}
+ hdcp->topology_info->device_count = device_cnt;
+ hdcp->topology_info->depth = HDCP_2_2_DEPTH(rx_info[0]);
+ memcpy(hdcp->topology_info->ksv_list, msgs.recvid_list.receiver_ids,
+ device_cnt * HDCP_2_2_RECEIVER_ID_LEN);
+
ret = hdcp2_verify_rep_topology_prepare_ack(connector,
&msgs.recvid_list,
&msgs.rep_ack);
@@ -1594,6 +1625,12 @@ static int _intel_hdcp2_enable(struct intel_connector *connector)
if (ret) {
DRM_DEBUG_KMS("HDCP2 Type%d Enabling Failed. (%d)\n",
hdcp->content_type, ret);
+
+ memset(hdcp->topology_info, 0,
+ sizeof(struct hdcp_topology_info));
+ drm_connector_update_hdcp_topology_property(&connector->base,
+ hdcp->topology_info);
+
return ret;
}
@@ -1601,12 +1638,16 @@ static int _intel_hdcp2_enable(struct intel_connector *connector)
connector->base.name, connector->base.base.id,
hdcp->content_type);
+ drm_connector_update_hdcp_topology_property(&connector->base,
+ hdcp->topology_info);
hdcp->hdcp2_encrypted = true;
+
return 0;
}
static int _intel_hdcp2_disable(struct intel_connector *connector)
{
+ struct intel_hdcp *hdcp = &connector->hdcp;
int ret;
DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being Disabled\n",
@@ -1617,8 +1658,11 @@ static int _intel_hdcp2_disable(struct intel_connector *connector)
if (hdcp2_deauthenticate_port(connector) < 0)
DRM_DEBUG_KMS("Port deauth failed.\n");
- connector->hdcp.hdcp2_encrypted = false;
+ hdcp->hdcp2_encrypted = false;
+ memset(hdcp->topology_info, 0, sizeof(struct hdcp_topology_info));
+ drm_connector_update_hdcp_topology_property(&connector->base,
+ hdcp->topology_info);
return ret;
}
@@ -1835,10 +1879,17 @@ int intel_hdcp_init(struct intel_connector *connector,
ret =
drm_connector_attach_content_protection_property(&connector->base,
hdcp->hdcp2_supported);
- if (ret) {
- hdcp->hdcp2_supported = false;
- kfree(hdcp->port_data.streams);
- return ret;
+ if (ret)
+ goto err_exit;
+
+ ret = drm_connector_attach_hdcp_topology_property(&connector->base);
+ if (ret)
+ goto err_exit;
+
+ hdcp->topology_info = kzalloc(sizeof(*hdcp->topology_info), GFP_KERNEL);
+ if (!hdcp->topology_info) {
+ ret = -ENOMEM;
+ goto err_exit;
}
hdcp->shim = shim;
@@ -1848,6 +1899,12 @@ int intel_hdcp_init(struct intel_connector *connector,
init_waitqueue_head(&hdcp->cp_irq_queue);
return 0;
+
+err_exit:
+ hdcp->hdcp2_supported = false;
+ kfree(hdcp->port_data.streams);
+
+ return ret;
}
int intel_hdcp_enable(struct intel_connector *connector, u8 content_type)
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index 011f35e121a5..34836d42675b 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -23,6 +23,7 @@
#define DRM_HDCP_V_PRIME_PART_LEN 4
#define DRM_HDCP_V_PRIME_NUM_PARTS 5
#define DRM_HDCP_NUM_DOWNSTREAM(x) (x & 0x7f)
+#define DRM_HDCP_DEPTH(x) ((x) & 0x7)
#define DRM_HDCP_MAX_CASCADE_EXCEEDED(x) (x & BIT(3))
#define DRM_HDCP_MAX_DEVICE_EXCEEDED(x) (x & BIT(7))
--
2.19.1
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