[PATCH v10 06/40] drm/i915: MEI interface definition
Ramalingam C
ramalingam.c at intel.com
Wed Jan 2 06:10:44 UTC 2019
Defining the mei-i915 interface functions and initialization of
the interface.
v2:
Adjust to the new interface changes. [Tomas]
Added further debug logs for the failures at MEI i/f.
port in hdcp_port data is equipped to handle -ve values.
v3:
mei comp is matched for global i915 comp master. [Daniel]
In hdcp_shim hdcp_protocol() is replaced with const variable. [Daniel]
mei wrappers are adjusted as per the i/f change [Daniel]
v4:
port initialization is done only at hdcp2_init only [Danvet]
Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/intel_drv.h | 5 +
drivers/gpu/drm/i915/intel_hdcp.c | 246 +++++++++++++++++++++++++++++++++++++-
include/drm/i915_component.h | 7 ++
3 files changed, 257 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 11db4cb70dad..3c08c26c33ce 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -39,6 +39,7 @@
#include <drm/drm_dp_mst_helper.h>
#include <drm/drm_rect.h>
#include <drm/drm_atomic.h>
+#include <drm/i915_mei_hdcp_interface.h>
#include <media/cec-notifier.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);
+
+ /* HDCP adaptation(DP/HDMI) required on the port */
+ enum hdcp_wired_protocol protocol;
};
struct intel_hdcp {
@@ -399,6 +403,7 @@ struct intel_hdcp {
* content can flow only through a link protected by HDCP2.2.
*/
u8 content_type;
+ struct hdcp_port_data port_data;
};
struct intel_connector {
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index d5843e1b1408..cd5dd4025742 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -8,8 +8,10 @@
#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"
@@ -833,6 +835,230 @@ bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port)
return INTEL_GEN(dev_priv) >= 9 && port < PORT_E;
}
+static __attribute__((unused)) int
+hdcp2_prepare_ake_init(struct intel_connector *connector,
+ struct hdcp2_ake_init *ake_data)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->initiate_hdcp2_session(comp->mei_dev,
+ data, ake_data);
+ if (ret)
+ DRM_DEBUG_KMS("Prepare_ake_init failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_verify_rx_cert_prepare_km(struct intel_connector *connector,
+ struct hdcp2_ake_send_cert *rx_cert,
+ bool *paired,
+ struct hdcp2_ake_no_stored_km *ek_pub_km,
+ size_t *msg_sz)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->verify_receiver_cert_prepare_km(comp->mei_dev,
+ data, rx_cert,
+ paired, ek_pub_km,
+ msg_sz);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Verify rx_cert failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_verify_hprime(struct intel_connector *connector,
+ struct hdcp2_ake_send_hprime *rx_hprime)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->verify_hprime(comp->mei_dev, data, rx_hprime);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Verify hprime failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_store_pairing_info(struct intel_connector *connector,
+ struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->store_pairing_info(comp->mei_dev, data,
+ pairing_info);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Store pairing info failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_prepare_lc_init(struct intel_connector *connector,
+ struct hdcp2_lc_init *lc_init)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->initiate_locality_check(comp->mei_dev, data,
+ lc_init);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Prepare lc_init failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_verify_lprime(struct intel_connector *connector,
+ struct hdcp2_lc_send_lprime *rx_lprime)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->verify_lprime(comp->mei_dev, data, rx_lprime);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Verify L_Prime failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused))
+int hdcp2_prepare_skey(struct intel_connector *connector,
+ struct hdcp2_ske_send_eks *ske_data)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->get_session_key(comp->mei_dev, data, ske_data);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Get session key failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_verify_rep_topology_prepare_ack(struct intel_connector *connector,
+ struct hdcp2_rep_send_receiverid_list
+ *rep_topology,
+ struct hdcp2_rep_send_ack *rep_send_ack)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->repeater_check_flow_prepare_ack(comp->mei_dev,
+ data,
+ rep_topology,
+ rep_send_ack);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Verify rep topology failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused)) int
+hdcp2_verify_mprime(struct intel_connector *connector,
+ struct hdcp2_rep_stream_ready *stream_ready)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->verify_mprime(comp->mei_dev, data, stream_ready);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Verify mprime failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused))
+int hdcp2_authenticate_port(struct intel_connector *connector)
+{
+ struct hdcp_port_data *data = &connector->hdcp.port_data;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+ int ret;
+
+ ret = comp->hdcp_ops->enable_hdcp_authentication(comp->mei_dev, data);
+ if (ret < 0)
+ DRM_DEBUG_KMS("Enable hdcp auth failed. %d\n", ret);
+
+ return ret;
+}
+
+static __attribute__((unused))
+int hdcp2_close_mei_session(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct i915_component_master *comp = dev_priv->comp_master;
+
+ return comp->hdcp_ops->close_hdcp_session(comp->mei_dev,
+ &connector->hdcp.port_data);
+}
+
+static __attribute__((unused))
+int hdcp2_deauthenticate_port(struct intel_connector *connector)
+{
+ return hdcp2_close_mei_session(connector);
+}
+
+static int i915_hdcp_component_match(struct device *dev, void *data)
+{
+ if (!dev && !dev->driver) {
+ DRM_DEBUG_KMS("device without driver\n");
+ return false;
+ }
+
+ return !strcmp(dev->driver->name, "mei_hdcp");
+}
+
+static int initialize_hdcp_port_data(struct intel_connector *connector)
+{
+ struct intel_hdcp *hdcp = &connector->hdcp;
+ struct hdcp_port_data *data = &hdcp->port_data;
+
+ data->port = connector->encoder->port;
+ data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
+ data->protocol = (u8)hdcp->shim->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)
{
if (!IS_ENABLED(CONFIG_INTEL_MEI_HDCP))
@@ -846,10 +1072,28 @@ 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;
+ static bool comp_match_added;
+ int ret;
WARN_ON(!is_hdcp2_supported(dev_priv));
- /* TODO: MEI interface needs to be initialized here */
+ ret = initialize_hdcp_port_data(connector);
+ if (ret) {
+ DRM_DEBUG_KMS("Mei hdcp data init failed\n");
+ return;
+ }
+
+ /*
+ * Component for mei is common across the connector.
+ * Adding the match once is sufficient.
+ * TODO: Instead of static bool, do we need flag in dev_priv?.
+ */
+ if (!comp_match_added) {
+ component_match_add(dev_priv->drm.dev, &dev_priv->master_match,
+ i915_hdcp_component_match, dev_priv);
+ comp_match_added = true;
+ }
+
hdcp->hdcp2_supported = true;
}
diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
index 6f94ddd3f2c2..7a7201374cfe 100644
--- a/include/drm/i915_component.h
+++ b/include/drm/i915_component.h
@@ -24,6 +24,8 @@
#ifndef _I915_COMPONENT_H_
#define _I915_COMPONENT_H_
+#include <drm/i915_mei_hdcp_interface.h>
+
#include "drm_audio_component.h"
/* MAX_PORT is the number of port
@@ -50,8 +52,13 @@ struct i915_audio_component {
* struct i915_component_master - Used for communication between i915
* and any other drivers for the services
* of different feature.
+ * @mei_dev: device that provide the HDCP2.2 service from MEI Bus.
+ * @hdcp_ops: Ops implemented by mei_hdcp driver, used by i915 driver.
*/
struct i915_component_master {
+ struct device *mei_dev;
+ 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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