[Intel-gfx] [PATCH v3 30/40] drm/i915: Initialize HDCP2.2 and its MEI interface
Ramalingam C
ramalingam.c at intel.com
Tue Apr 3 13:57:43 UTC 2018
Initialize HDCP2.2 support. This includes the mei interface
initialization along with required notifier registration.
v2:
mei interface handle is protected with mutex. [Chris Wilson]
v3:
Notifiers are used for the mei interface state.
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 | 5 +-
drivers/gpu/drm/i915/intel_hdcp.c | 104 +++++++++++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
4 files changed, 109 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9a4a51e79fa1..955a20208097 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6381,7 +6381,8 @@ 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 ca06d9a158f6..2f14756b4b0e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -442,7 +442,7 @@ struct intel_hdcp {
/* mei interface related information */
struct mei_cl_device *cldev;
struct mei_hdcp_data mei_data;
-
+ struct notifier_block mei_cldev_nb;
struct delayed_work hdcp2_check_work;
};
@@ -1928,7 +1928,8 @@ 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);
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 53d35ee8f683..6eb58a833c7d 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -11,6 +11,7 @@
#include <linux/i2c.h>
#include <linux/random.h>
#include <linux/mei_hdcp.h>
+#include <linux/notifier.h>
#include "intel_drv.h"
#include "i915_reg.h"
@@ -25,6 +26,7 @@ static int _intel_hdcp2_enable(struct intel_connector *connector);
static int _intel_hdcp2_disable(struct intel_connector *connector);
static void intel_hdcp2_check_work(struct work_struct *work);
static int intel_hdcp2_check_link(struct intel_connector *connector);
+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)
@@ -686,11 +688,15 @@ 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 *hdcp_shim)
+ const struct intel_hdcp_shim *hdcp_shim,
+ bool hdcp2_supported)
{
struct intel_hdcp *hdcp = &connector->hdcp;
int ret;
+ if (!hdcp_shim)
+ return -EINVAL;
+
ret = drm_connector_attach_content_protection_property(
&connector->base);
if (ret)
@@ -699,7 +705,12 @@ int intel_hdcp_init(struct intel_connector *connector,
hdcp->hdcp_shim = hdcp_shim;
mutex_init(&hdcp->hdcp_mutex);
INIT_DELAYED_WORK(&hdcp->hdcp_check_work, intel_hdcp_check_work);
+ INIT_DELAYED_WORK(&hdcp->hdcp2_check_work, intel_hdcp2_check_work);
INIT_WORK(&hdcp->hdcp_prop_work, intel_hdcp_prop_work);
+
+ if (hdcp2_supported)
+ intel_hdcp2_init(connector);
+
return 0;
}
@@ -1565,3 +1576,94 @@ static void intel_hdcp2_check_work(struct work_struct *work)
schedule_delayed_work(&hdcp->hdcp2_check_work,
DRM_HDCP2_CHECK_PERIOD_MS);
}
+
+static inline 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->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)
+ return -ENOMEM;
+
+ data->streams[0].stream_id = 0;
+ data->streams[0].stream_type = hdcp->content_type;
+
+ return 0;
+}
+
+static void intel_hdcp2_exit(struct intel_connector *connector)
+{
+ intel_hdcp_disable(connector);
+ kfree(connector->hdcp.mei_data.streams);
+}
+
+static int mei_cldev_notify(struct notifier_block *nb, unsigned long event,
+ void *cldev)
+{
+ struct intel_hdcp *hdcp = container_of(nb, struct intel_hdcp,
+ mei_cldev_nb);
+ struct intel_connector *intel_connector = container_of(hdcp,
+ struct intel_connector,
+ hdcp);
+
+ DRM_ERROR("MEI_HDCP Notification. Interface: %s\n",
+ cldev ? "UP" : "Down");
+
+ if (event == MEI_CLDEV_ENABLED) {
+ hdcp->cldev = cldev;
+ initialize_mei_hdcp_data(intel_connector);
+ } else {
+ hdcp->cldev = NULL;
+ intel_hdcp2_exit(intel_connector);
+ }
+ return NOTIFY_OK;
+}
+
+static inline
+bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
+{
+ return (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv) ||
+ IS_KABYLAKE(dev_priv));
+}
+
+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;
+
+ if (!is_hdcp2_supported(dev_priv))
+ return -EINVAL;
+
+ hdcp->hdcp2_supported = true;
+
+ hdcp->mei_cldev_nb.notifier_call = mei_cldev_notify;
+ ret = mei_cldev_register_notify(&hdcp->mei_cldev_nb);
+ if (ret) {
+ DRM_ERROR("mei_cldev not available. %d\n", ret);
+ goto exit;
+ }
+
+ ret = initialize_mei_hdcp_data(connector);
+ if (ret)
+ mei_cldev_unregister_notify(&hdcp->mei_cldev_nb);
+
+exit:
+ if (ret)
+ hdcp->hdcp2_supported = false;
+ return ret;
+}
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1baef4ac7ecb..b8b1086c0cbd 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2342,7 +2342,7 @@ 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");
}
--
2.7.4
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