[PATCH v8 06/35] drm/i915: Initialize HDCP2.2 and its MEI interface
Ramalingam C
ramalingam.c at intel.com
Thu Oct 25 06:04:03 UTC 2018
Initialize HDCP2.2 support. This includes the mei interface
initialization along with required component registration.
v2:
mei interface handle is protected with mutex. [Chris Wilson]
v3:
Notifiers are used for the mei interface state.
v4:
Poll for mei client device state
Error msg for out of mem [Uma]
Inline req for init function removed [Uma]
v5:
Rebase as Part of reordering.
Component is used for the I915 and MEI_HDCP interface [Daniel]
v6:
HDCP2.2 uses the I915 component master to communicate with mei_hdcp
- [Daniel]
Required HDCP2.2 variables defined [Sean Paul]
v7:
intel_hdcp2.2_init returns void [Uma]
Realigning the codes.
v8:
hdcp comp master add is moved into hdcp_init
Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +
drivers/gpu/drm/i915/intel_dp.c | 3 +-
drivers/gpu/drm/i915/intel_drv.h | 22 +++-
drivers/gpu/drm/i915/intel_hdcp.c | 263 +++++++++++++++++++++++++++++---------
drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
include/drm/i915_component.h | 71 ++++++++++
6 files changed, 300 insertions(+), 63 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2d7761b8ac07..f0bdcecd0605 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2152,6 +2152,8 @@ struct drm_i915_private {
struct i915_pmu pmu;
+ struct i915_hdcp_component_master *hdcp_comp;
+
/*
* NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
* will be rejected. Instead look for a better place.
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 8e64f149ab09..81e54233ba15 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6650,7 +6650,8 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
intel_dp_add_properties(intel_dp, connector);
if (is_hdcp_supported(dev_priv, port) && !intel_dp_is_edp(intel_dp)) {
- int ret = intel_hdcp_init(intel_connector, &intel_dp_hdcp_shim);
+ int ret = intel_hdcp_init(intel_connector, &intel_dp_hdcp_shim,
+ false);
if (ret)
DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 268afb6d2746..4c546422bc65 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -29,6 +29,7 @@
#include <linux/i2c.h>
#include <linux/hdmi.h>
#include <linux/sched/clock.h>
+#include <linux/mei_hdcp.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include <drm/drm_crtc.h>
@@ -379,6 +380,9 @@ struct intel_hdcp_shim {
/* Detects panel's hdcp capability. This is optional for HDMI. */
int (*hdcp_capable)(struct intel_digital_port *intel_dig_port,
bool *hdcp_capable);
+
+ /* Detects the HDCP protocol(DP/HDMI) required on the port */
+ enum hdcp_protocol (*hdcp_protocol)(void);
};
struct intel_hdcp {
@@ -388,6 +392,20 @@ struct intel_hdcp {
u64 value;
struct delayed_work check_work;
struct work_struct prop_work;
+
+ /* HDCP2.2 related definitions */
+ /* Flag indicates whether this connector supports HDCP2.2 or not. */
+ bool hdcp2_supported;
+
+ /*
+ * 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)
+ * content can flow only through a link protected by HDCP2.2.
+ */
+ u8 content_type;
+
+ /* mei interface related information */
+ struct mei_hdcp_data mei_data;
};
struct intel_connector {
@@ -2005,12 +2023,14 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
struct drm_connector_state *old_state,
struct drm_connector_state *new_state);
int intel_hdcp_init(struct intel_connector *connector,
- const struct intel_hdcp_shim *hdcp_shim);
+ const struct intel_hdcp_shim *hdcp_shim,
+ bool hdcp2_supported);
int intel_hdcp_enable(struct intel_connector *connector);
int intel_hdcp_disable(struct intel_connector *connector);
int intel_hdcp_check_link(struct intel_connector *connector);
bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
bool intel_hdcp_capable(struct intel_connector *connector);
+bool is_hdcp2_supported(struct drm_i915_private *dev_priv);
/* intel_psr.c */
#define CAN_PSR(dev_priv) (HAS_PSR(dev_priv) && dev_priv->psr.sink_support)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 26daf54ffde9..bd29d14b1cc5 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -8,13 +8,17 @@
#include <drm/drmP.h>
#include <drm/drm_hdcp.h>
+#include <drm/i915_component.h>
#include <linux/i2c.h>
#include <linux/random.h>
+#include <linux/component.h>
#include "intel_drv.h"
#include "i915_reg.h"
#define KEY_LOAD_TRIES 5
+#define GET_MEI_DDI_INDEX(port) (((port) == PORT_A) ? DDI_A : \
+ (enum hdcp_physical_port)(port))
static
bool intel_hdcp_is_ksv_valid(u8 *ksv)
@@ -728,6 +732,65 @@ struct intel_connector *intel_hdcp_to_connector(struct intel_hdcp *hdcp)
return container_of(hdcp, struct intel_connector, hdcp);
}
+/* Implements Part 3 of the HDCP authorization procedure */
+int intel_hdcp_check_link(struct intel_connector *connector)
+{
+ struct intel_hdcp *hdcp = &connector->hdcp;
+ struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
+ struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+ enum port port = intel_dig_port->base.port;
+ int ret = 0;
+
+ if (!hdcp->shim)
+ return -ENOENT;
+
+ mutex_lock(&hdcp->mutex);
+
+ if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+ goto out;
+
+ if (!(I915_READ(PORT_HDCP_STATUS(port)) & HDCP_STATUS_ENC)) {
+ DRM_ERROR("%s:%d HDCP check failed: link is not encrypted,%x\n",
+ connector->base.name, connector->base.base.id,
+ I915_READ(PORT_HDCP_STATUS(port)));
+ ret = -ENXIO;
+ hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ schedule_work(&hdcp->prop_work);
+ goto out;
+ }
+
+ if (hdcp->shim->check_link(intel_dig_port)) {
+ if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+ hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+ schedule_work(&hdcp->prop_work);
+ }
+ goto out;
+ }
+
+ DRM_DEBUG_KMS("[%s:%d] HDCP link failed, retrying authentication\n",
+ connector->base.name, connector->base.base.id);
+
+ ret = _intel_hdcp_disable(connector);
+ if (ret) {
+ DRM_ERROR("Failed to disable hdcp (%d)\n", ret);
+ hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ schedule_work(&hdcp->prop_work);
+ goto out;
+ }
+
+ ret = _intel_hdcp_enable(connector);
+ if (ret) {
+ DRM_ERROR("Failed to enable hdcp (%d)\n", ret);
+ hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ schedule_work(&hdcp->prop_work);
+ goto out;
+ }
+
+out:
+ mutex_unlock(&hdcp->mutex);
+ return ret;
+}
+
static void intel_hdcp_check_work(struct work_struct *work)
{
struct intel_hdcp *hdcp = container_of(to_delayed_work(work),
@@ -772,12 +835,147 @@ bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port)
!IS_CHERRYVIEW(dev_priv) && port < PORT_E);
}
+static int i915_hdcp_component_master_bind(struct device *dev)
+{
+ struct drm_i915_private *dev_priv = kdev_to_i915(dev);
+ struct i915_hdcp_component_master *comp = dev_priv->hdcp_comp;
+ int ret;
+
+ mutex_lock(&comp->mutex);
+ ret = component_bind_all(dev, comp);
+ if (ret < 0)
+ return ret;
+
+ mutex_unlock(&comp->mutex);
+ return ret;
+}
+
+static void i915_hdcp_component_master_unbind(struct device *dev)
+{
+ struct drm_i915_private *dev_priv = kdev_to_i915(dev);
+ struct i915_hdcp_component_master *comp = dev_priv->hdcp_comp;
+
+ mutex_lock(&comp->mutex);
+ component_unbind_all(dev, comp);
+ WARN_ON(comp->ops);
+ mutex_unlock(&comp->mutex);
+}
+
+static const struct component_master_ops i915_hdcp_component_master_ops = {
+ .bind = i915_hdcp_component_master_bind,
+ .unbind = i915_hdcp_component_master_unbind,
+};
+
+static int i915_hdcp_component_match(struct device *dev, void *data)
+{
+ return !strcmp(dev->driver->name, "mei_hdcp");
+}
+
+static int intel_hdcp_component_init(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_hdcp_component_master *comp;
+ struct component_match *match = NULL;
+ int ret;
+
+ comp = kzalloc(sizeof(*comp), GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ mutex_init(&comp->mutex);
+ dev_priv->hdcp_comp = comp;
+
+ component_match_add(dev_priv->drm.dev, &match,
+ i915_hdcp_component_match, dev_priv);
+ ret = component_master_add_with_match(dev_priv->drm.dev,
+ &i915_hdcp_component_master_ops,
+ match);
+ if (ret < 0)
+ goto out_err;
+
+ DRM_INFO("I915 hdcp component master added.\n");
+ return ret;
+
+out_err:
+ component_master_del(dev_priv->drm.dev,
+ &i915_hdcp_component_master_ops);
+ kfree(comp);
+ dev_priv->hdcp_comp = NULL;
+ DRM_ERROR("Failed to add i915 hdcp component master (%d)\n", ret);
+
+ return ret;
+}
+
+static int initialize_mei_hdcp_data(struct intel_connector *connector)
+{
+ struct intel_hdcp *hdcp = &connector->hdcp;
+ struct mei_hdcp_data *data = &hdcp->mei_data;
+ enum port port;
+
+ if (connector->encoder) {
+ port = connector->encoder->port;
+ data->port = GET_MEI_DDI_INDEX(port);
+ }
+
+ data->port_type = INTEGRATED;
+ data->protocol = hdcp->shim->hdcp_protocol();
+
+ data->k = 1;
+ if (!data->streams)
+ data->streams = kcalloc(data->k,
+ sizeof(struct hdcp2_streamid_type),
+ GFP_KERNEL);
+ if (!data->streams) {
+ DRM_ERROR("Out of Memory\n");
+ return -ENOMEM;
+ }
+
+ data->streams[0].stream_id = 0;
+ data->streams[0].stream_type = hdcp->content_type;
+
+ return 0;
+}
+
+bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
+{
+ return ((INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv) ||
+ IS_KABYLAKE(dev_priv)) && IS_ENABLED(CONFIG_INTEL_MEI_HDCP));
+}
+
+static void intel_hdcp2_init(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct intel_hdcp *hdcp = &connector->hdcp;
+ int ret;
+
+ WARN_ON(!is_hdcp2_supported(dev_priv));
+ ret = initialize_mei_hdcp_data(connector);
+ if (ret) {
+ DRM_DEBUG_KMS("Mei hdcp data init failed\n");
+ return;
+ }
+
+ if (!dev_priv->hdcp_comp)
+ ret = intel_hdcp_component_init(connector);
+
+ if (ret) {
+ DRM_DEBUG_KMS("HDCP comp init failed\n");
+ kfree(hdcp->mei_data.streams);
+ return;
+ }
+ hdcp->hdcp2_supported = true;
+}
+
int intel_hdcp_init(struct intel_connector *connector,
- const struct intel_hdcp_shim *shim)
+ const struct intel_hdcp_shim *shim,
+ bool hdcp2_supported)
{
struct intel_hdcp *hdcp = &connector->hdcp;
int ret;
+ if (!shim)
+ return -EINVAL;
+
ret = drm_connector_attach_content_protection_property(
&connector->base);
if (ret)
@@ -787,6 +985,10 @@ int intel_hdcp_init(struct intel_connector *connector,
mutex_init(&hdcp->mutex);
INIT_DELAYED_WORK(&hdcp->check_work, intel_hdcp_check_work);
INIT_WORK(&hdcp->prop_work, intel_hdcp_prop_work);
+
+ if (hdcp2_supported)
+ intel_hdcp2_init(connector);
+
return 0;
}
@@ -865,62 +1067,3 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
new_state->crtc);
crtc_state->mode_changed = true;
}
-
-/* Implements Part 3 of the HDCP authorization procedure */
-int intel_hdcp_check_link(struct intel_connector *connector)
-{
- struct intel_hdcp *hdcp = &connector->hdcp;
- struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
- struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
- enum port port = intel_dig_port->base.port;
- int ret = 0;
-
- if (!hdcp->shim)
- return -ENOENT;
-
- mutex_lock(&hdcp->mutex);
-
- if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
- goto out;
-
- if (!(I915_READ(PORT_HDCP_STATUS(port)) & HDCP_STATUS_ENC)) {
- DRM_ERROR("%s:%d HDCP check failed: link is not encrypted,%x\n",
- connector->base.name, connector->base.base.id,
- I915_READ(PORT_HDCP_STATUS(port)));
- ret = -ENXIO;
- hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
- schedule_work(&hdcp->prop_work);
- goto out;
- }
-
- if (hdcp->shim->check_link(intel_dig_port)) {
- if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
- hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
- schedule_work(&hdcp->prop_work);
- }
- goto out;
- }
-
- DRM_DEBUG_KMS("[%s:%d] HDCP link failed, retrying authentication\n",
- connector->base.name, connector->base.base.id);
-
- ret = _intel_hdcp_disable(connector);
- if (ret) {
- DRM_ERROR("Failed to disable hdcp (%d)\n", ret);
- hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
- schedule_work(&hdcp->prop_work);
- goto out;
- }
-
- ret = _intel_hdcp_enable(connector);
- if (ret) {
- DRM_ERROR("Failed to enable hdcp (%d)\n", ret);
- hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
- schedule_work(&hdcp->prop_work);
- goto out;
- }
-
-out:
- mutex_unlock(&hdcp->mutex);
- return ret;
-}
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index d3e653640ce7..177f13093f97 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2402,7 +2402,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
if (is_hdcp_supported(dev_priv, port)) {
int ret = intel_hdcp_init(intel_connector,
- &intel_hdmi_hdcp_shim);
+ &intel_hdmi_hdcp_shim, false);
if (ret)
DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
}
diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
index fca22d463e1b..0419f157f257 100644
--- a/include/drm/i915_component.h
+++ b/include/drm/i915_component.h
@@ -26,6 +26,10 @@
#include "drm_audio_component.h"
+#include <linux/mei_cl_bus.h>
+#include <linux/mei_hdcp.h>
+#include <drm/drm_hdcp.h>
+
/* MAX_PORT is the number of port
* It must be sync with I915_MAX_PORTS defined i915_drv.h
*/
@@ -46,4 +50,71 @@ struct i915_audio_component {
int aud_sample_rate[MAX_PORTS];
};
+struct i915_hdcp_component_ops {
+ /**
+ * @owner: mei_hdcp module
+ */
+ struct module *owner;
+ int (*initiate_hdcp2_session)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_init *ake_data);
+ int
+ (*verify_receiver_cert_prepare_km)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_send_cert *rx_cert,
+ bool *km_stored,
+ struct hdcp2_ake_no_stored_km
+ *ek_pub_km,
+ size_t *msg_sz);
+ int (*verify_hprime)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_send_hprime *rx_hprime);
+ int (*store_pairing_info)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_send_pairing_info
+ *pairing_info);
+ int (*initiate_locality_check)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_lc_init *lc_init_data);
+ int (*verify_lprime)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_lc_send_lprime *rx_lprime);
+ int (*get_session_key)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ske_send_eks *ske_data);
+ int
+ (*repeater_check_flow_prepare_ack)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_rep_send_receiverid_list
+ *rep_topology,
+ struct hdcp2_rep_send_ack
+ *rep_send_ack);
+ int (*verify_mprime)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_rep_stream_ready *stream_ready);
+ int (*enable_hdcp_authentication)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data);
+ int (*close_hdcp_session)(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data);
+};
+
+/**
+ * struct i915_hdcp_component_master - Used for communication between i915
+ * and mei_hdcp for HDCP2.2 services.
+ */
+struct i915_hdcp_component_master {
+ /**
+ * @mei_cldev: mei client device, used as parameter for ops
+ */
+ struct mei_cl_device *mei_cldev;
+ /**
+ * @mutex: Mutex to protect the state of mei_cldev
+ */
+ struct mutex mutex;
+ /**
+ * @ops: Ops implemented by mei_hdcp driver, used by i915 driver.
+ */
+ const struct i915_hdcp_component_ops *ops;
+};
+
#endif /* _I915_COMPONENT_H_ */
--
2.7.4
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