[PATCH v6 09/35] drm/i915: Initialize HDCP2.2 and its MEI interface
Ramalingam C
ramalingam.c at intel.com
Sat Jul 14 03:14:51 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]
Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 3 +-
drivers/gpu/drm/i915/intel_drv.h | 23 +++++++++++-
drivers/gpu/drm/i915/intel_hdcp.c | 77 ++++++++++++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
include/drm/i915_component.h | 60 ++++++++++++++++++++++++++++++
5 files changed, 161 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 5be07e1d816d..12eb5bd33b7e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6406,7 +6406,8 @@ 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 c32665136d5d..38262792813a 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>
@@ -376,6 +377,9 @@ 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 {
@@ -385,6 +389,20 @@ struct intel_hdcp {
uint64_t 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 {
@@ -1903,11 +1921,14 @@ 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);
+int intel_hdcp_component_init(struct drm_i915_private *dev_priv);
+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 55bc4d423187..cfe915c3f336 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -8,13 +8,19 @@
#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 int intel_hdcp2_init(struct intel_connector *connector);
static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port,
const struct intel_hdcp_shim *shim)
@@ -744,11 +750,15 @@ bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port)
}
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)
@@ -758,6 +768,10 @@ 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;
}
@@ -895,3 +909,64 @@ int intel_hdcp_check_link(struct intel_connector *connector)
mutex_unlock(&hdcp->mutex);
return ret;
}
+
+static int i915_hdcp_component_match(struct device *dev, void *data)
+{
+ return !strcmp(dev->driver->name, "mei_hdcp");
+}
+
+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 int 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)
+ goto exit;
+
+ component_match_add(dev_priv->drm.dev, &dev_priv->master_match,
+ i915_hdcp_component_match, dev_priv);
+
+ hdcp->hdcp2_supported = true;
+
+exit:
+ return ret;
+}
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 8363fbd18ee8..7988f958d835 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2366,7 +2366,7 @@ 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 52313bc227b2..f208a83ea2c9 100644
--- a/include/drm/i915_component.h
+++ b/include/drm/i915_component.h
@@ -24,6 +24,10 @@
#ifndef _I915_COMPONENT_H_
#define _I915_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
*/
@@ -121,6 +125,54 @@ struct i915_audio_component {
const struct i915_audio_component_audio_ops *audio_ops;
};
+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_component_master - Used for communication between i915
* and any other drivers for the services of different feature.
@@ -131,6 +183,14 @@ struct i915_component_master {
* removing the reference to mei_cldev.
*/
struct device *i915_kdev;
+ /**
+ * @mei_cldev: mei client device, used as parameter for ops
+ */
+ struct mei_cl_device *mei_cldev;
+ /**
+ * @ops: Ops implemented by mei_hdcp driver, used by i915 driver.
+ */
+ const struct i915_hdcp_component_ops *hdcp_ops;
/*
* Add here the interface details between I915 and interested modules.
--
2.7.4
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