[PATCH v14 00/32] drm/i915: Implement HDCP2.2

[PATCH v14 00/32] drm/i915: Implement HDCP2.2

[Ramalingam C]

This series enables the HDCP2.2 Type 0 for I915. The sequence for
HDCP2.2 authentication and encryption is implemented as a generic flow
between HDMI and DP. Encoder specific implementations are moved
into hdcp_shim.

Intel HWs supports HDCP2.2 through ME FW. Hence this series
introduces a client driver for mei bus, so that for HDCP2.2
authentication, HDCP2.2 stack in I915 can avail the services from
ME FW. To enable this client driver set the config variable
CONFIG_INTEL_MEI_HDCP.

Userspace interface remains unchanged as version agnostic. When
userspace request for HDCP enable, Kernel will detect the HDCP source
and sink's HDCP version(1.4/2.2)capability and enable the best capable
version for that combination.

This series enables the HDCP2.2 for Type0 content streams.

Test-with: <1549566452-30175-1-git-send-email-ramalingam.c@intel.com>

Major changes in v14
  - enum port is moved into the drm/i915_drm.h
  - Small fixes for mei_hdcp Kernel-Doc
  - ICL device ID patch is already merged. So dropped it.
  - Couple of patches are merged already. So dropped them.

To ease the review process, series is hosted at
https://github.com/ramalingampc2008/drm-tip.git hdcp2_2_v14_rebased

Ramalingam C (30):
  drm/i915: Gathering the HDCP1.4 routines together
  drm/i915: Initialize HDCP2.2
  drm/i915: MEI interface implementation
  drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking
  drm/i915: Enable and Disable of HDCP2.2
  drm/i915: Implement HDCP2.2 receiver authentication
  drm/i915: Implement HDCP2.2 repeater authentication
  drm: HDCP2.2 link check period
  drm/i915: Implement HDCP2.2 link integrity check
  drm/i915: Handle HDCP2.2 downstream topology change
  drm: removing the DP Errata msg and its msg id
  drm/i915: Implement the HDCP2.2 support for DP
  drm/i915: Implement the HDCP2.2 support for HDMI
  drm/i915: CP_IRQ handling for DP HDCP2.2 msgs
  drm/i915: Fix KBL HDCP2.2 encrypt status signalling
  misc/mei/hdcp: Client driver for HDCP application
  misc/mei/hdcp: Define ME FW interface for HDCP2.2
  misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session
  misc/mei/hdcp: Verify Receiver Cert and prepare km
  misc/mei/hdcp: Verify H_prime
  misc/mei/hdcp: Store the HDCP Pairing info
  misc/mei/hdcp: Initiate Locality check
  misc/mei/hdcp: Verify L_prime
  misc/mei/hdcp: Prepare Session Key
  misc/mei/hdcp: Repeater topology verification and ack
  misc/mei/hdcp: Verify M_prime
  misc/mei/hdcp: Enabling the HDCP authentication
  misc/mei/hdcp: Closing wired HDCP2.2 Tx Session
  misc/mei/hdcp: Component framework for I915 Interface
  FOR_TEST_ONLY: i915/Kconfig: Select mei_hdcp by I915

Tomas Winkler (2):
  mei: bus: whitelist hdcp client
  mei: bus: export to_mei_cl_device for mei client device drivers

 drivers/gpu/drm/i915/i915_drv.c        |    1 +
 drivers/gpu/drm/i915/i915_drv.h        |    7 +
 drivers/gpu/drm/i915/intel_connector.c |    2 +
 drivers/gpu/drm/i915/intel_display.c   |    4 +
 drivers/gpu/drm/i915/intel_dp.c        |  350 ++++++++-
 drivers/gpu/drm/i915/intel_drv.h       |   83 ++-
 drivers/gpu/drm/i915/intel_hdcp.c      | 1242 +++++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/intel_hdmi.c      |  237 +++++-
 drivers/misc/mei/Kconfig               |    8 +
 drivers/misc/mei/Makefile              |    2 +
 drivers/misc/mei/bus-fixup.c           |   16 +
 drivers/misc/mei/bus.c                 |    1 -
 drivers/misc/mei/hdcp/Makefile         |    7 +
 drivers/misc/mei/hdcp/mei_hdcp.c       |  847 ++++++++++++++++++++++
 drivers/misc/mei/hdcp/mei_hdcp.h       |  377 ++++++++++
 include/drm/drm_hdcp.h                 |    7 +-
 include/linux/mei_cl_bus.h             |    2 +
 17 files changed, 3068 insertions(+), 125 deletions(-)
 create mode 100644 drivers/misc/mei/hdcp/Makefile
 create mode 100644 drivers/misc/mei/hdcp/mei_hdcp.c
 create mode 100644 drivers/misc/mei/hdcp/mei_hdcp.h

-- 
2.7.4

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[PATCH v14 01/32] drm/i915: Gathering the HDCP1.4 routines together

[Ramalingam C]

All HDCP1.4 routines are gathered together, followed by the generic
functions those can be extended for HDCP2.2 too.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/gpu/drm/i915/intel_hdcp.c | 118 +++++++++++++++++++-------------------
 1 file changed, 59 insertions(+), 59 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index ce7ba3a9c000..8cb85b07cfde 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -730,6 +730,65 @@ 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),
@@ -866,62 +925,3 @@ 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_DEBUG_KMS("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;
-}
-- 
2.7.4

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[PATCH v14 02/32] drm/i915: Initialize HDCP2.2

[Ramalingam C]

Add the HDCP2.2 initialization to the existing HDCP1.4 stack.

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:
  Avoid using bool structure members.
  MEI interface related changes are moved into separate patch.
  Commit msg is updated accordingly.
  intel_hdcp_exit is defined and used from i915_unload
v9:
  Movement of the hdcp_check_link is moved to new patch [Daniel]
  intel_hdcp2_exit is removed as mei_comp will be unbind in i915_unload.
v10:
  bool is used in struct to make coding simpler. [Daniel]
  hdmi hdcp init is placed correctly after encoder attachment.
v11:
  hdcp2_capability check is moved into hdcp.c [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_drv.h  | 11 +++++++++++
 drivers/gpu/drm/i915/intel_hdcp.c | 28 ++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_hdmi.c |  6 +++---
 3 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3398b28c053b..11c696025085 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -404,6 +404,17 @@ 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;
 };
 
 struct intel_connector {
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 8cb85b07cfde..7b1097d79fb8 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -832,14 +832,34 @@ bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port)
 	return INTEL_GEN(dev_priv) >= 9 && port < PORT_E;
 }
 
+static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
+{
+	if (!IS_ENABLED(CONFIG_INTEL_MEI_HDCP))
+		return false;
+
+	return (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv) ||
+		IS_KABYLAKE(dev_priv));
+}
+
+static void intel_hdcp2_init(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+
+	/* TODO: MEI interface needs to be initialized here */
+	hdcp->hdcp2_supported = true;
+}
+
 int intel_hdcp_init(struct intel_connector *connector,
 		    const struct intel_hdcp_shim *shim)
 {
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	struct intel_hdcp *hdcp = &connector->hdcp;
 	int ret;
 
-	ret = drm_connector_attach_content_protection_property(
-			&connector->base);
+	if (!shim)
+		return -EINVAL;
+
+	ret = drm_connector_attach_content_protection_property(&connector->base);
 	if (ret)
 		return ret;
 
@@ -847,6 +867,10 @@ 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 (is_hdcp2_supported(dev_priv))
+		intel_hdcp2_init(connector);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index f125a62eba8c..faeedf76db99 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2427,6 +2427,9 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 
 	intel_hdmi_add_properties(intel_hdmi, connector);
 
+	intel_connector_attach_encoder(intel_connector, intel_encoder);
+	intel_hdmi->attached_connector = intel_connector;
+
 	if (is_hdcp_supported(dev_priv, port)) {
 		int ret = intel_hdcp_init(intel_connector,
 					  &intel_hdmi_hdcp_shim);
@@ -2434,9 +2437,6 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 			DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
 	}
 
-	intel_connector_attach_encoder(intel_connector, intel_encoder);
-	intel_hdmi->attached_connector = intel_connector;
-
 	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 	 * 0xd.  Failure to do so will result in spurious interrupts being
 	 * generated on the port when a cable is not attached.
-- 
2.7.4

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[PATCH v14 03/32] drm/i915: MEI interface implementation

[Ramalingam C]

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]
v5:
  I915 registers a subcomponent to be matched with mei_hdcp [Daniel]
v6:
  HDCP_disable for all connectors incase of comp_unbind.
  Tear down HDCP comp interface at i915_unload [Daniel]
v7:
  Component init and fini are moved out of connector ops [Daniel]
  hdcp_disable is not called from unbind. [Daniel]
v8:
  subcomponent name is dropped as it is already merged.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> [v11]
---
 drivers/gpu/drm/i915/i915_drv.c        |   1 +
 drivers/gpu/drm/i915/i915_drv.h        |   7 +
 drivers/gpu/drm/i915/intel_connector.c |   2 +
 drivers/gpu/drm/i915/intel_display.c   |   4 +
 drivers/gpu/drm/i915/intel_drv.h       |   8 +
 drivers/gpu/drm/i915/intel_hdcp.c      | 398 ++++++++++++++++++++++++++++++++-
 6 files changed, 419 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 6630212f2faf..c6354f6cdbdb 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -906,6 +906,7 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv)
 	mutex_init(&dev_priv->av_mutex);
 	mutex_init(&dev_priv->wm.wm_mutex);
 	mutex_init(&dev_priv->pps_mutex);
+	mutex_init(&dev_priv->hdcp_comp_mutex);
 
 	i915_memcpy_init_early(dev_priv);
 	intel_runtime_pm_init_early(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 5c8d0489a1cd..d375d1cf86f5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -55,6 +55,7 @@
 #include <drm/drm_util.h>
 #include <drm/drm_dsc.h>
 #include <drm/drm_connector.h>
+#include <drm/i915_mei_hdcp_interface.h>
 
 #include "i915_fixed.h"
 #include "i915_params.h"
@@ -2052,6 +2053,12 @@ struct drm_i915_private {
 
 	struct i915_pmu pmu;
 
+	struct i915_hdcp_comp_master *hdcp_master;
+	bool hdcp_comp_added;
+
+	/* Mutex to protect the above hdcp component related values. */
+	struct mutex hdcp_comp_mutex;
+
 	/*
 	 * 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_connector.c b/drivers/gpu/drm/i915/intel_connector.c
index ee16758747c5..66ed3ee5998a 100644
--- a/drivers/gpu/drm/i915/intel_connector.c
+++ b/drivers/gpu/drm/i915/intel_connector.c
@@ -88,6 +88,8 @@ void intel_connector_destroy(struct drm_connector *connector)
 
 	kfree(intel_connector->detect_edid);
 
+	intel_hdcp_cleanup(intel_connector);
+
 	if (!IS_ERR_OR_NULL(intel_connector->edid))
 		kfree(intel_connector->edid);
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 73a107b6eb9a..acb993ce7eaa 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15453,6 +15453,8 @@ int intel_modeset_init(struct drm_device *dev)
 	intel_update_czclk(dev_priv);
 	intel_modeset_init_hw(dev);
 
+	intel_hdcp_component_init(dev_priv);
+
 	if (dev_priv->max_cdclk_freq == 0)
 		intel_update_max_cdclk(dev_priv);
 
@@ -16314,6 +16316,8 @@ void intel_modeset_cleanup(struct drm_device *dev)
 	/* flush any delayed tasks or pending work */
 	flush_scheduled_work();
 
+	intel_hdcp_component_fini(dev_priv);
+
 	drm_mode_config_cleanup(dev);
 
 	intel_overlay_cleanup(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 11c696025085..f8e8482573c8 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -41,6 +41,7 @@
 #include <drm/drm_rect.h>
 #include <drm/drm_vblank.h>
 #include <drm/drm_atomic.h>
+#include <drm/i915_mei_hdcp_interface.h>
 #include <media/cec-notifier.h>
 
 struct drm_printer;
@@ -395,6 +396,9 @@ 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 {
@@ -415,6 +419,7 @@ 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 {
@@ -2088,6 +2093,9 @@ 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);
+void intel_hdcp_component_init(struct drm_i915_private *dev_priv);
+void intel_hdcp_component_fini(struct drm_i915_private *dev_priv);
+void intel_hdcp_cleanup(struct intel_connector *connector);
 
 /* 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 7b1097d79fb8..d06bef9d1ab2 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -7,8 +7,10 @@
  */
 
 #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"
@@ -832,6 +834,347 @@ 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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->initiate_hdcp2_session(comp->mei_dev, data, ake_data);
+	if (ret)
+		DRM_DEBUG_KMS("Prepare_ake_init failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->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);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_hprime(comp->mei_dev, data, rx_hprime);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify hprime failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->store_pairing_info(comp->mei_dev, data, pairing_info);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Store pairing info failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->initiate_locality_check(comp->mei_dev, data, lc_init);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Prepare lc_init failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_lprime(comp->mei_dev, data, rx_lprime);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify L_Prime failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->get_session_key(comp->mei_dev, data, ske_data);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Get session key failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->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);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_mprime(comp->mei_dev, data, stream_ready);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify mprime failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->enable_hdcp_authentication(comp->mei_dev, data);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Enable hdcp auth failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	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_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->close_hdcp_session(comp->mei_dev,
+					     &connector->hdcp.port_data);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static __attribute__((unused))
+int hdcp2_deauthenticate_port(struct intel_connector *connector)
+{
+	return hdcp2_close_mei_session(connector);
+}
+
+static int i915_hdcp_component_bind(struct device *i915_kdev,
+				    struct device *mei_kdev, void *data)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+
+	DRM_DEBUG("I915 HDCP comp bind\n");
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	dev_priv->hdcp_master = (struct i915_hdcp_comp_master *)data;
+	dev_priv->hdcp_master->mei_dev = mei_kdev;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return 0;
+}
+
+static void i915_hdcp_component_unbind(struct device *i915_kdev,
+				       struct device *mei_kdev, void *data)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+
+	DRM_DEBUG("I915 HDCP comp unbind\n");
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	dev_priv->hdcp_master = NULL;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+}
+
+static const struct component_ops i915_hdcp_component_ops = {
+	.bind   = i915_hdcp_component_bind,
+	.unbind = i915_hdcp_component_unbind,
+};
+
+static inline 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;
+}
+
 static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
 {
 	if (!IS_ENABLED(CONFIG_INTEL_MEI_HDCP))
@@ -841,11 +1184,40 @@ static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
 		IS_KABYLAKE(dev_priv));
 }
 
+void intel_hdcp_component_init(struct drm_i915_private *dev_priv)
+{
+	int ret;
+
+	if (!is_hdcp2_supported(dev_priv))
+		return;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	WARN_ON(dev_priv->hdcp_comp_added);
+
+	dev_priv->hdcp_comp_added = true;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+	ret = component_add_typed(dev_priv->drm.dev, &i915_hdcp_component_ops,
+				  I915_COMPONENT_HDCP);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("Failed at component add(%d)\n", ret);
+		mutex_lock(&dev_priv->hdcp_comp_mutex);
+		dev_priv->hdcp_comp_added = false;
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return;
+	}
+}
+
 static void intel_hdcp2_init(struct intel_connector *connector)
 {
 	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret;
+
+	ret = initialize_hdcp_port_data(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
+		return;
+	}
 
-	/* TODO: MEI interface needs to be initialized here */
 	hdcp->hdcp2_supported = true;
 }
 
@@ -917,6 +1289,30 @@ int intel_hdcp_disable(struct intel_connector *connector)
 	return ret;
 }
 
+void intel_hdcp_component_fini(struct drm_i915_private *dev_priv)
+{
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	if (!dev_priv->hdcp_comp_added) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return;
+	}
+
+	dev_priv->hdcp_comp_added = false;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
+}
+
+void intel_hdcp_cleanup(struct intel_connector *connector)
+{
+	if (!connector->hdcp.shim)
+		return;
+
+	mutex_lock(&connector->hdcp.mutex);
+	kfree(connector->hdcp.port_data.streams);
+	mutex_unlock(&connector->hdcp.mutex);
+}
+
 void intel_hdcp_atomic_check(struct drm_connector *connector,
 			     struct drm_connector_state *old_state,
 			     struct drm_connector_state *new_state)
-- 
2.7.4

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH v14 04/32] drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking

[Ramalingam C]

"hdcp_encrypted" flag is defined to denote the HDCP1.4 encryption status.
This SW tracking is used to determine the need for real hdcp1.4 disable
and hdcp_check_link upon CP_IRQ.

On CP_IRQ we filter the CP_IRQ related to the states like Link failure
and reauthentication req etc and handle them in hdcp_check_link.
CP_IRQ corresponding to the authentication msg availability are ignored.

WARN_ON is added for the abrupt stop of HDCP encryption of a port.

v2:
  bool is used in struct for the cleaner coding. [Daniel]
  check_link work_fn is scheduled for cp_irq handling [Daniel]
v3:
  rebased.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c   |  2 +-
 drivers/gpu/drm/i915/intel_drv.h  |  5 ++-
 drivers/gpu/drm/i915/intel_hdcp.c | 73 ++++++++++++++++++++++++++++-----------
 3 files changed, 58 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index cf709835fb9a..9f73a4239574 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4780,7 +4780,7 @@ static void intel_dp_check_service_irq(struct intel_dp *intel_dp)
 		intel_dp_handle_test_request(intel_dp);
 
 	if (val & DP_CP_IRQ)
-		intel_hdcp_check_link(intel_dp->attached_connector);
+		intel_hdcp_handle_cp_irq(intel_dp->attached_connector);
 
 	if (val & DP_SINK_SPECIFIC_IRQ)
 		DRM_DEBUG_DRIVER("Sink specific irq unhandled\n");
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f8e8482573c8..df2c88877480 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -409,6 +409,9 @@ struct intel_hdcp {
 	struct delayed_work check_work;
 	struct work_struct prop_work;
 
+	/* HDCP1.4 Encryption status */
+	bool hdcp_encrypted;
+
 	/* HDCP2.2 related definitions */
 	/* Flag indicates whether this connector supports HDCP2.2 or not. */
 	bool hdcp2_supported;
@@ -2090,12 +2093,12 @@ int intel_hdcp_init(struct intel_connector *connector,
 		    const struct intel_hdcp_shim *hdcp_shim);
 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);
 void intel_hdcp_component_init(struct drm_i915_private *dev_priv);
 void intel_hdcp_component_fini(struct drm_i915_private *dev_priv);
 void intel_hdcp_cleanup(struct intel_connector *connector);
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector);
 
 /* 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 d06bef9d1ab2..66e3850a57a0 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -74,6 +74,16 @@ bool intel_hdcp_capable(struct intel_connector *connector)
 	return capable;
 }
 
+static inline bool intel_hdcp_in_use(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	enum port port = connector->encoder->port;
+	u32 reg;
+
+	reg = I915_READ(PORT_HDCP_STATUS(port));
+	return reg & HDCP_STATUS_ENC;
+}
+
 static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port,
 				    const struct intel_hdcp_shim *shim)
 {
@@ -668,6 +678,7 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 	DRM_DEBUG_KMS("[%s:%d] HDCP is being disabled...\n",
 		      connector->base.name, connector->base.base.id);
 
+	hdcp->hdcp_encrypted = false;
 	I915_WRITE(PORT_HDCP_CONF(port), 0);
 	if (intel_wait_for_register(dev_priv, PORT_HDCP_STATUS(port), ~0, 0,
 				    ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) {
@@ -713,8 +724,10 @@ static int _intel_hdcp_enable(struct intel_connector *connector)
 	/* Incase of authentication failures, HDCP spec expects reauth. */
 	for (i = 0; i < tries; i++) {
 		ret = intel_hdcp_auth(conn_to_dig_port(connector), hdcp->shim);
-		if (!ret)
+		if (!ret) {
+			hdcp->hdcp_encrypted = true;
 			return 0;
+		}
 
 		DRM_DEBUG_KMS("HDCP Auth failure (%d)\n", ret);
 
@@ -741,16 +754,17 @@ int intel_hdcp_check_link(struct intel_connector *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)
+	/* Check_link valid only when HDCP1.4 is enabled */
+	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_ENABLED ||
+	    !hdcp->hdcp_encrypted) {
+		ret = -EINVAL;
 		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",
+	if (WARN_ON(!intel_hdcp_in_use(connector))) {
+		DRM_ERROR("%s:%d HDCP link stopped encryption,%x\n",
 			  connector->base.name, connector->base.base.id,
 			  I915_READ(PORT_HDCP_STATUS(port)));
 		ret = -ENXIO;
@@ -791,18 +805,6 @@ int intel_hdcp_check_link(struct intel_connector *connector)
 	return ret;
 }
 
-static void intel_hdcp_check_work(struct work_struct *work)
-{
-	struct intel_hdcp *hdcp = container_of(to_delayed_work(work),
-					       struct intel_hdcp,
-					       check_work);
-	struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
-
-	if (!intel_hdcp_check_link(connector))
-		schedule_delayed_work(&hdcp->check_work,
-				      DRM_HDCP_CHECK_PERIOD_MS);
-}
-
 static void intel_hdcp_prop_work(struct work_struct *work)
 {
 	struct intel_hdcp *hdcp = container_of(work, struct intel_hdcp,
@@ -1120,6 +1122,18 @@ int hdcp2_deauthenticate_port(struct intel_connector *connector)
 	return hdcp2_close_mei_session(connector);
 }
 
+static void intel_hdcp_check_work(struct work_struct *work)
+{
+	struct intel_hdcp *hdcp = container_of(to_delayed_work(work),
+					       struct intel_hdcp,
+					       check_work);
+	struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
+
+	if (!intel_hdcp_check_link(connector))
+		schedule_delayed_work(&hdcp->check_work,
+				      DRM_HDCP_CHECK_PERIOD_MS);
+}
+
 static int i915_hdcp_component_bind(struct device *i915_kdev,
 				    struct device *mei_kdev, void *data)
 {
@@ -1281,7 +1295,8 @@ int intel_hdcp_disable(struct intel_connector *connector)
 
 	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
 		hdcp->value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
-		ret = _intel_hdcp_disable(connector);
+		if (hdcp->hdcp_encrypted)
+			ret = _intel_hdcp_disable(connector);
 	}
 
 	mutex_unlock(&hdcp->mutex);
@@ -1345,3 +1360,21 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 						   new_state->crtc);
 	crtc_state->mode_changed = true;
 }
+
+/* Handles the CP_IRQ raised from the DP HDCP sink */
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+
+	if (!hdcp->shim)
+		return;
+
+	/*
+	 * CP_IRQ could be triggered due to 1. HDCP2.2 auth msgs availability,
+	 * 2. link failure and 3. repeater reauth request. At present we dont
+	 * handle the CP_IRQ for the HDCP2.2 auth msg availability for read.
+	 * To handle other two causes for CP_IRQ we have the work_fn which is
+	 * scheduled here.
+	 */
+	schedule_delayed_work(&hdcp->check_work, 0);
+}
-- 
2.7.4

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[PATCH v14 05/32] drm/i915: Enable and Disable of HDCP2.2

[Ramalingam C]

Considering that HDCP2.2 is more secure than HDCP1.4, When a setup
supports HDCP2.2 and HDCP1.4, HDCP2.2 will be enabled.

When HDCP2.2 enabling fails and HDCP1.4 is supported, HDCP1.4 is
enabled.

This change implements a sequence of enabling and disabling of
HDCP2.2 authentication and HDCP2.2 port encryption.

v2:
  Included few optimization suggestions [Chris Wilson]
  Commit message is updated as per the rebased version.
  intel_wait_for_register is used instead of wait_for. [Chris Wilson]
v3:
  Extra comment added and Style issue fixed [Uma]
v4:
  Rebased as part of patch reordering.
  HDCP2 encryption status is tracked.
  HW state check is moved into WARN_ON [Daniel]
v5:
  Redefined the mei service functions as per comp redesign.
  Merged patches related to hdcp2.2 enabling and disabling [Sean Paul].
  Required shim functionality is defined [Sean Paul]
v6:
  Return values are handles [Uma]
  Realigned the code.
  Check for comp_master is removed.
v7:
  HDCP2.2 is attempted only if mei interface is up.
  Adjust to the new interface
  Avoid bool usage in struct [Tomas]
v8:
  mei_binded status check is removed.
  %s/hdcp2_in_use/hdcp2_encrypted
v9:
  bool is used in struct intel_hdcp. [Daniel]
v10:
  panel is replaced with sink [Uma]
  Mei interface decided the hdcp2_capability.
  WARN_ON if hdcp_enable is called when hdcp state is ENABLED.
  Reviewed-by Uma.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_drv.h  |   7 ++
 drivers/gpu/drm/i915/intel_hdcp.c | 212 +++++++++++++++++++++++++++++++++++---
 2 files changed, 205 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index df2c88877480..2c99f88b71a7 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -399,6 +399,10 @@ struct intel_hdcp_shim {
 
 	/* HDCP adaptation(DP/HDMI) required on the port */
 	enum hdcp_wired_protocol protocol;
+
+	/* Detects whether sink is HDCP2.2 capable */
+	int (*hdcp_2_2_capable)(struct intel_digital_port *intel_dig_port,
+				bool *capable);
 };
 
 struct intel_hdcp {
@@ -416,6 +420,9 @@ struct intel_hdcp {
 	/* Flag indicates whether this connector supports HDCP2.2 or not. */
 	bool hdcp2_supported;
 
+	/* HDCP2.2 Encryption status */
+	bool hdcp2_encrypted;
+
 	/*
 	 * 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)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 66e3850a57a0..0b6ccb3d24fe 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -74,6 +74,32 @@ bool intel_hdcp_capable(struct intel_connector *connector)
 	return capable;
 }
 
+/* Is HDCP2.2 capable on Platform and Sink */
+static bool intel_hdcp2_capable(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	bool capable = false;
+
+	/* I915 support for HDCP2.2 */
+	if (!hdcp->hdcp2_supported)
+		return false;
+
+	/* MEI interface is solid */
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+		if (!dev_priv->hdcp_comp_added ||  !dev_priv->hdcp_master) {
+			mutex_unlock(&dev_priv->hdcp_comp_mutex);
+			return false;
+		}
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	/* Sink's capability for HDCP2.2 */
+	hdcp->shim->hdcp_2_2_capable(intel_dig_port, &capable);
+
+	return capable;
+}
+
 static inline bool intel_hdcp_in_use(struct intel_connector *connector)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
@@ -1094,8 +1120,7 @@ int hdcp2_authenticate_port(struct intel_connector *connector)
 	return ret;
 }
 
-static __attribute__((unused))
-int hdcp2_close_mei_session(struct intel_connector *connector)
+static int hdcp2_close_mei_session(struct intel_connector *connector)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	struct i915_hdcp_comp_master *comp;
@@ -1116,12 +1141,157 @@ int hdcp2_close_mei_session(struct intel_connector *connector)
 	return ret;
 }
 
-static __attribute__((unused))
-int hdcp2_deauthenticate_port(struct intel_connector *connector)
+static int hdcp2_deauthenticate_port(struct intel_connector *connector)
 {
 	return hdcp2_close_mei_session(connector);
 }
 
+static int hdcp2_authenticate_sink(struct intel_connector *connector)
+{
+	DRM_ERROR("Sink authentication is done in subsequent patches\n");
+
+	return -EINVAL;
+}
+
+static int hdcp2_enable_encryption(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	enum port port = connector->encoder->port;
+	int ret;
+
+	WARN_ON(I915_READ(HDCP2_STATUS_DDI(port)) & LINK_ENCRYPTION_STATUS);
+
+	if (hdcp->shim->toggle_signalling) {
+		ret = hdcp->shim->toggle_signalling(intel_dig_port, true);
+		if (ret) {
+			DRM_ERROR("Failed to enable HDCP signalling. %d\n",
+				  ret);
+			return ret;
+		}
+	}
+
+	if (I915_READ(HDCP2_STATUS_DDI(port)) & LINK_AUTH_STATUS) {
+		/* Link is Authenticated. Now set for Encryption */
+		I915_WRITE(HDCP2_CTL_DDI(port),
+			   I915_READ(HDCP2_CTL_DDI(port)) |
+			   CTL_LINK_ENCRYPTION_REQ);
+	}
+
+	ret = intel_wait_for_register(dev_priv, HDCP2_STATUS_DDI(port),
+				      LINK_ENCRYPTION_STATUS,
+				      LINK_ENCRYPTION_STATUS,
+				      ENCRYPT_STATUS_CHANGE_TIMEOUT_MS);
+
+	return ret;
+}
+
+static int hdcp2_disable_encryption(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	enum port port = connector->encoder->port;
+	int ret;
+
+	WARN_ON(!(I915_READ(HDCP2_STATUS_DDI(port)) & LINK_ENCRYPTION_STATUS));
+
+	I915_WRITE(HDCP2_CTL_DDI(port),
+		   I915_READ(HDCP2_CTL_DDI(port)) & ~CTL_LINK_ENCRYPTION_REQ);
+
+	ret = intel_wait_for_register(dev_priv, HDCP2_STATUS_DDI(port),
+				      LINK_ENCRYPTION_STATUS, 0x0,
+				      ENCRYPT_STATUS_CHANGE_TIMEOUT_MS);
+	if (ret == -ETIMEDOUT)
+		DRM_DEBUG_KMS("Disable Encryption Timedout");
+
+	if (hdcp->shim->toggle_signalling) {
+		ret = hdcp->shim->toggle_signalling(intel_dig_port, false);
+		if (ret) {
+			DRM_ERROR("Failed to disable HDCP signalling. %d\n",
+				  ret);
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
+{
+	int ret, i, tries = 3;
+
+	for (i = 0; i < tries; i++) {
+		ret = hdcp2_authenticate_sink(connector);
+		if (!ret)
+			break;
+
+		/* Clearing the mei hdcp session */
+		DRM_DEBUG_KMS("HDCP2.2 Auth %d of %d Failed.(%d)\n",
+			      i + 1, tries, ret);
+		if (hdcp2_deauthenticate_port(connector) < 0)
+			DRM_DEBUG_KMS("Port deauth failed.\n");
+	}
+
+	if (i != tries) {
+		/*
+		 * Ensuring the required 200mSec min time interval between
+		 * Session Key Exchange and encryption.
+		 */
+		msleep(HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN);
+		ret = hdcp2_enable_encryption(connector);
+		if (ret < 0) {
+			DRM_DEBUG_KMS("Encryption Enable Failed.(%d)\n", ret);
+			if (hdcp2_deauthenticate_port(connector) < 0)
+				DRM_DEBUG_KMS("Port deauth failed.\n");
+		}
+	}
+
+	return ret;
+}
+
+static int _intel_hdcp2_enable(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret;
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being enabled. Type: %d\n",
+		      connector->base.name, connector->base.base.id,
+		      hdcp->content_type);
+
+	ret = hdcp2_authenticate_and_encrypt(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("HDCP2 Type%d  Enabling Failed. (%d)\n",
+			      hdcp->content_type, ret);
+		return ret;
+	}
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is enabled. Type %d\n",
+		      connector->base.name, connector->base.base.id,
+		      hdcp->content_type);
+
+	hdcp->hdcp2_encrypted = true;
+	return 0;
+}
+
+static int _intel_hdcp2_disable(struct intel_connector *connector)
+{
+	int ret;
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being Disabled\n",
+		      connector->base.name, connector->base.base.id);
+
+	ret = hdcp2_disable_encryption(connector);
+
+	if (hdcp2_deauthenticate_port(connector) < 0)
+		DRM_DEBUG_KMS("Port deauth failed.\n");
+
+	connector->hdcp.hdcp2_encrypted = false;
+
+	return ret;
+}
+
 static void intel_hdcp_check_work(struct work_struct *work)
 {
 	struct intel_hdcp *hdcp = container_of(to_delayed_work(work),
@@ -1263,22 +1433,34 @@ int intel_hdcp_init(struct intel_connector *connector,
 int intel_hdcp_enable(struct intel_connector *connector)
 {
 	struct intel_hdcp *hdcp = &connector->hdcp;
-	int ret;
+	int ret = -EINVAL;
 
 	if (!hdcp->shim)
 		return -ENOENT;
 
 	mutex_lock(&hdcp->mutex);
+	WARN_ON(hdcp->value == DRM_MODE_CONTENT_PROTECTION_ENABLED);
 
-	ret = _intel_hdcp_enable(connector);
-	if (ret)
-		goto out;
+	/*
+	 * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
+	 * is capable of HDCP2.2, it is preferred to use HDCP2.2.
+	 */
+	if (intel_hdcp2_capable(connector))
+		ret = _intel_hdcp2_enable(connector);
+
+	/* When HDCP2.2 fails, HDCP1.4 will be attempted */
+	if (ret && intel_hdcp_capable(connector)) {
+		ret = _intel_hdcp_enable(connector);
+		if (!ret)
+			schedule_delayed_work(&hdcp->check_work,
+					      DRM_HDCP_CHECK_PERIOD_MS);
+	}
+
+	if (!ret) {
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+		schedule_work(&hdcp->prop_work);
+	}
 
-	hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
-	schedule_work(&hdcp->prop_work);
-	schedule_delayed_work(&hdcp->check_work,
-			      DRM_HDCP_CHECK_PERIOD_MS);
-out:
 	mutex_unlock(&hdcp->mutex);
 	return ret;
 }
@@ -1295,7 +1477,9 @@ int intel_hdcp_disable(struct intel_connector *connector)
 
 	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
 		hdcp->value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
-		if (hdcp->hdcp_encrypted)
+		if (hdcp->hdcp2_encrypted)
+			ret = _intel_hdcp2_disable(connector);
+		else if (hdcp->hdcp_encrypted)
 			ret = _intel_hdcp_disable(connector);
 	}
 
-- 
2.7.4

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[PATCH v14 06/32] drm/i915: Implement HDCP2.2 receiver authentication

[Ramalingam C]

Implements HDCP2.2 authentication for hdcp2.2 receivers, with
following steps:
	Authentication and Key exchange (AKE).
	Locality Check (LC).
	Session Key Exchange(SKE).
	DP Errata for stream type configuration for receivers.

At AKE, the HDCP Receiver’s public key certificate is verified by the
HDCP Transmitter. A Master Key k m is exchanged.

At LC, the HDCP Transmitter enforces locality on the content by
requiring that the Round Trip Time (RTT) between a pair of messages
is not more than 20 ms.

At SKE, The HDCP Transmitter exchanges Session Key ks with
the HDCP Receiver.

In DP HDCP2.2 encryption and decryption logics use the stream type as
one of the parameter. So Before enabling the Encryption DP HDCP2.2
receiver needs to be communicated with stream type. This is added to
spec as ERRATA.

This generic implementation is complete only with the hdcp2 specific
functions defined at hdcp_shim.

v2: Rebased.
v3:
  %s/PARING/PAIRING
  Coding style fixing [Uma]
v4:
  Rebased as part of patch reordering.
  Defined the functions for mei services. [Daniel]
v5:
  Redefined the mei service functions as per comp redesign.
  Required intel_hdcp members are defined [Sean Paul]
v6:
  Typo of cipher is Fixed [Uma]
  %s/uintxx_t/uxx
  Check for comp_master is removed.
v7:
  Adjust to the new interface.
  Avoid using bool structure members. [Tomas]
v8: Rebased.
v9:
  bool is used in struct intel_hdcp [Daniel]
  config_stream_type is redesigned [Daniel]
  Reviewed-by Uma.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_drv.h  |  34 +++++++
 drivers/gpu/drm/i915/intel_hdcp.c | 197 +++++++++++++++++++++++++++++++++++---
 2 files changed, 216 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 2c99f88b71a7..5797ee0078f2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -403,6 +403,22 @@ struct intel_hdcp_shim {
 	/* Detects whether sink is HDCP2.2 capable */
 	int (*hdcp_2_2_capable)(struct intel_digital_port *intel_dig_port,
 				bool *capable);
+
+	/* Write HDCP2.2 messages */
+	int (*write_2_2_msg)(struct intel_digital_port *intel_dig_port,
+			     void *buf, size_t size);
+
+	/* Read HDCP2.2 messages */
+	int (*read_2_2_msg)(struct intel_digital_port *intel_dig_port,
+			    u8 msg_id, void *buf, size_t size);
+
+	/*
+	 * Implementation of DP HDCP2.2 Errata for the communication of stream
+	 * type to Receivers. In DP HDCP2.2 Stream type is one of the input to
+	 * the HDCP2.2 Cipher for En/De-Cryption. Not applicable for HDMI.
+	 */
+	int (*config_stream_type)(struct intel_digital_port *intel_dig_port,
+				  bool is_repeater, u8 type);
 };
 
 struct intel_hdcp {
@@ -430,6 +446,24 @@ struct intel_hdcp {
 	 */
 	u8 content_type;
 	struct hdcp_port_data port_data;
+
+	bool is_paired;
+	bool is_repeater;
+
+	/*
+	 * Count of ReceiverID_List received. Initialized to 0 at AKE_INIT.
+	 * Incremented after processing the RepeaterAuth_Send_ReceiverID_List.
+	 * When it rolls over re-auth has to be triggered.
+	 */
+	u32 seq_num_v;
+
+	/*
+	 * Count of RepeaterAuth_Stream_Manage msg propagated.
+	 * Initialized to 0 on AKE_INIT. Incremented after every successful
+	 * transmission of RepeaterAuth_Stream_Manage message. When it rolls
+	 * over re-Auth has to be triggered.
+	 */
+	u32 seq_num_m;
 };
 
 struct intel_connector {
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 0b6ccb3d24fe..d63f620581ad 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -17,6 +17,7 @@
 
 #define KEY_LOAD_TRIES	5
 #define ENCRYPT_STATUS_CHANGE_TIMEOUT_MS	50
+#define HDCP2_LC_RETRY_CNT			3
 
 static
 bool intel_hdcp_is_ksv_valid(u8 *ksv)
@@ -862,7 +863,7 @@ 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
+static int
 hdcp2_prepare_ake_init(struct intel_connector *connector,
 		       struct hdcp2_ake_init *ake_data)
 {
@@ -887,7 +888,7 @@ hdcp2_prepare_ake_init(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
+static int
 hdcp2_verify_rx_cert_prepare_km(struct intel_connector *connector,
 				struct hdcp2_ake_send_cert *rx_cert,
 				bool *paired,
@@ -917,9 +918,8 @@ hdcp2_verify_rx_cert_prepare_km(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
-hdcp2_verify_hprime(struct intel_connector *connector,
-		    struct hdcp2_ake_send_hprime *rx_hprime)
+static 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);
@@ -942,7 +942,7 @@ hdcp2_verify_hprime(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
+static int
 hdcp2_store_pairing_info(struct intel_connector *connector,
 			 struct hdcp2_ake_send_pairing_info *pairing_info)
 {
@@ -967,7 +967,7 @@ hdcp2_store_pairing_info(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
+static int
 hdcp2_prepare_lc_init(struct intel_connector *connector,
 		      struct hdcp2_lc_init *lc_init)
 {
@@ -992,7 +992,7 @@ hdcp2_prepare_lc_init(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
+static int
 hdcp2_verify_lprime(struct intel_connector *connector,
 		    struct hdcp2_lc_send_lprime *rx_lprime)
 {
@@ -1017,9 +1017,8 @@ hdcp2_verify_lprime(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused))
-int hdcp2_prepare_skey(struct intel_connector *connector,
-		       struct hdcp2_ske_send_eks *ske_data)
+static 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);
@@ -1096,8 +1095,7 @@ hdcp2_verify_mprime(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused))
-int hdcp2_authenticate_port(struct intel_connector *connector)
+static 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);
@@ -1146,11 +1144,180 @@ static int hdcp2_deauthenticate_port(struct intel_connector *connector)
 	return hdcp2_close_mei_session(connector);
 }
 
+/* Authentication flow starts from here */
+static int hdcp2_authentication_key_exchange(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	union {
+		struct hdcp2_ake_init ake_init;
+		struct hdcp2_ake_send_cert send_cert;
+		struct hdcp2_ake_no_stored_km no_stored_km;
+		struct hdcp2_ake_send_hprime send_hprime;
+		struct hdcp2_ake_send_pairing_info pairing_info;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	size_t size;
+	int ret;
+
+	/* Init for seq_num */
+	hdcp->seq_num_v = 0;
+	hdcp->seq_num_m = 0;
+
+	ret = hdcp2_prepare_ake_init(connector, &msgs.ake_init);
+	if (ret < 0)
+		return ret;
+
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.ake_init,
+				  sizeof(msgs.ake_init));
+	if (ret < 0)
+		return ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_AKE_SEND_CERT,
+				 &msgs.send_cert, sizeof(msgs.send_cert));
+	if (ret < 0)
+		return ret;
+
+	if (msgs.send_cert.rx_caps[0] != HDCP_2_2_RX_CAPS_VERSION_VAL)
+		return -EINVAL;
+
+	hdcp->is_repeater = HDCP_2_2_RX_REPEATER(msgs.send_cert.rx_caps[2]);
+
+	/*
+	 * Here msgs.no_stored_km will hold msgs corresponding to the km
+	 * stored also.
+	 */
+	ret = hdcp2_verify_rx_cert_prepare_km(connector, &msgs.send_cert,
+					      &hdcp->is_paired,
+					      &msgs.no_stored_km, &size);
+	if (ret < 0)
+		return ret;
+
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.no_stored_km, size);
+	if (ret < 0)
+		return ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_AKE_SEND_HPRIME,
+				 &msgs.send_hprime, sizeof(msgs.send_hprime));
+	if (ret < 0)
+		return ret;
+
+	ret = hdcp2_verify_hprime(connector, &msgs.send_hprime);
+	if (ret < 0)
+		return ret;
+
+	if (!hdcp->is_paired) {
+		/* Pairing is required */
+		ret = shim->read_2_2_msg(intel_dig_port,
+					 HDCP_2_2_AKE_SEND_PAIRING_INFO,
+					 &msgs.pairing_info,
+					 sizeof(msgs.pairing_info));
+		if (ret < 0)
+			return ret;
+
+		ret = hdcp2_store_pairing_info(connector, &msgs.pairing_info);
+		if (ret < 0)
+			return ret;
+		hdcp->is_paired = true;
+	}
+
+	return 0;
+}
+
+static int hdcp2_locality_check(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	union {
+		struct hdcp2_lc_init lc_init;
+		struct hdcp2_lc_send_lprime send_lprime;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	int tries = HDCP2_LC_RETRY_CNT, ret, i;
+
+	for (i = 0; i < tries; i++) {
+		ret = hdcp2_prepare_lc_init(connector, &msgs.lc_init);
+		if (ret < 0)
+			continue;
+
+		ret = shim->write_2_2_msg(intel_dig_port, &msgs.lc_init,
+				      sizeof(msgs.lc_init));
+		if (ret < 0)
+			continue;
+
+		ret = shim->read_2_2_msg(intel_dig_port,
+					 HDCP_2_2_LC_SEND_LPRIME,
+					 &msgs.send_lprime,
+					 sizeof(msgs.send_lprime));
+		if (ret < 0)
+			continue;
+
+		ret = hdcp2_verify_lprime(connector, &msgs.send_lprime);
+		if (!ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int hdcp2_session_key_exchange(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct hdcp2_ske_send_eks send_eks;
+	int ret;
+
+	ret = hdcp2_prepare_skey(connector, &send_eks);
+	if (ret < 0)
+		return ret;
+
+	ret = hdcp->shim->write_2_2_msg(intel_dig_port, &send_eks,
+					sizeof(send_eks));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 static int hdcp2_authenticate_sink(struct intel_connector *connector)
 {
-	DRM_ERROR("Sink authentication is done in subsequent patches\n");
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	int ret;
 
-	return -EINVAL;
+	ret = hdcp2_authentication_key_exchange(connector);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("AKE Failed. Err : %d\n", ret);
+		return ret;
+	}
+
+	ret = hdcp2_locality_check(connector);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("Locality Check failed. Err : %d\n", ret);
+		return ret;
+	}
+
+	ret = hdcp2_session_key_exchange(connector);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("SKE Failed. Err : %d\n", ret);
+		return ret;
+	}
+
+	if (shim->config_stream_type) {
+		ret = shim->config_stream_type(intel_dig_port,
+					       hdcp->is_repeater,
+					       hdcp->content_type);
+		if (ret < 0)
+			return ret;
+	}
+
+	hdcp->port_data.streams[0].stream_type = hdcp->content_type;
+	ret = hdcp2_authenticate_port(connector);
+	if (ret < 0)
+		return ret;
+
+	return ret;
 }
 
 static int hdcp2_enable_encryption(struct intel_connector *connector)
-- 
2.7.4

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[PATCH v14 07/32] drm/i915: Implement HDCP2.2 repeater authentication

[Ramalingam C]

Implements the HDCP2.2 repeaters authentication steps such as verifying
the downstream topology and sending stream management information.

v2: Rebased.
v3:
  -EINVAL is returned for topology error and rollover scenario.
  Endianness conversion func from drm_hdcp.h is used [Uma]
v4:
  Rebased as part of patches reordering.
  Defined the mei service functions [Daniel]
v5:
  Redefined the mei service functions as per comp redesign.
v6:
  %s/uintxx_t/uxx
  Check for comp_master is removed.
v7:
  Adjust to the new mei interface.
  style issue fixed.
v8:
  drm_hdcp.h change is moved into separate patch [Daniel]
v9:
  %s/__swab16/cpu_to_be16. [Tomas]
  Reviewed-by Uma.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_hdcp.c | 125 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 123 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index d63f620581ad..24051120d3bb 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1041,7 +1041,7 @@ static int hdcp2_prepare_skey(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
+static int
 hdcp2_verify_rep_topology_prepare_ack(struct intel_connector *connector,
 				      struct hdcp2_rep_send_receiverid_list
 								*rep_topology,
@@ -1070,7 +1070,7 @@ hdcp2_verify_rep_topology_prepare_ack(struct intel_connector *connector,
 	return ret;
 }
 
-static __attribute__((unused)) int
+static int
 hdcp2_verify_mprime(struct intel_connector *connector,
 		    struct hdcp2_rep_stream_ready *stream_ready)
 {
@@ -1279,6 +1279,119 @@ static int hdcp2_session_key_exchange(struct intel_connector *connector)
 	return 0;
 }
 
+static
+int hdcp2_propagate_stream_management_info(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	union {
+		struct hdcp2_rep_stream_manage stream_manage;
+		struct hdcp2_rep_stream_ready stream_ready;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	int ret;
+
+	/* Prepare RepeaterAuth_Stream_Manage msg */
+	msgs.stream_manage.msg_id = HDCP_2_2_REP_STREAM_MANAGE;
+	drm_hdcp2_u32_to_seq_num(msgs.stream_manage.seq_num_m, hdcp->seq_num_m);
+
+	/* K no of streams is fixed as 1. Stored as big-endian. */
+	msgs.stream_manage.k = cpu_to_be16(1);
+
+	/* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */
+	msgs.stream_manage.streams[0].stream_id = 0;
+	msgs.stream_manage.streams[0].stream_type = hdcp->content_type;
+
+	/* Send it to Repeater */
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.stream_manage,
+				  sizeof(msgs.stream_manage));
+	if (ret < 0)
+		return ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_REP_STREAM_READY,
+				 &msgs.stream_ready, sizeof(msgs.stream_ready));
+	if (ret < 0)
+		return ret;
+
+	hdcp->port_data.seq_num_m = hdcp->seq_num_m;
+	hdcp->port_data.streams[0].stream_type = hdcp->content_type;
+
+	ret = hdcp2_verify_mprime(connector, &msgs.stream_ready);
+	if (ret < 0)
+		return ret;
+
+	hdcp->seq_num_m++;
+
+	if (hdcp->seq_num_m > HDCP_2_2_SEQ_NUM_MAX) {
+		DRM_DEBUG_KMS("seq_num_m roll over.\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static
+int hdcp2_authenticate_repeater_topology(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	union {
+		struct hdcp2_rep_send_receiverid_list recvid_list;
+		struct hdcp2_rep_send_ack rep_ack;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	u8 *rx_info;
+	u32 seq_num_v;
+	int ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_REP_SEND_RECVID_LIST,
+				 &msgs.recvid_list, sizeof(msgs.recvid_list));
+	if (ret < 0)
+		return ret;
+
+	rx_info = msgs.recvid_list.rx_info;
+
+	if (HDCP_2_2_MAX_CASCADE_EXCEEDED(rx_info[1]) ||
+	    HDCP_2_2_MAX_DEVS_EXCEEDED(rx_info[1])) {
+		DRM_DEBUG_KMS("Topology Max Size Exceeded\n");
+		return -EINVAL;
+	}
+
+	/* Converting and Storing the seq_num_v to local variable as DWORD */
+	seq_num_v = drm_hdcp2_seq_num_to_u32(msgs.recvid_list.seq_num_v);
+
+	if (seq_num_v < hdcp->seq_num_v) {
+		/* Roll over of the seq_num_v from repeater. Reauthenticate. */
+		DRM_DEBUG_KMS("Seq_num_v roll over.\n");
+		return -EINVAL;
+	}
+
+	ret = hdcp2_verify_rep_topology_prepare_ack(connector,
+						    &msgs.recvid_list,
+						    &msgs.rep_ack);
+	if (ret < 0)
+		return ret;
+
+	hdcp->seq_num_v = seq_num_v;
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.rep_ack,
+				  sizeof(msgs.rep_ack));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int hdcp2_authenticate_repeater(struct intel_connector *connector)
+{
+	int ret;
+
+	ret = hdcp2_authenticate_repeater_topology(connector);
+	if (ret < 0)
+		return ret;
+
+	return hdcp2_propagate_stream_management_info(connector);
+}
+
 static int hdcp2_authenticate_sink(struct intel_connector *connector)
 {
 	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
@@ -1312,6 +1425,14 @@ static int hdcp2_authenticate_sink(struct intel_connector *connector)
 			return ret;
 	}
 
+	if (hdcp->is_repeater) {
+		ret = hdcp2_authenticate_repeater(connector);
+		if (ret < 0) {
+			DRM_DEBUG_KMS("Repeater Auth Failed. Err: %d\n", ret);
+			return ret;
+		}
+	}
+
 	hdcp->port_data.streams[0].stream_type = hdcp->content_type;
 	ret = hdcp2_authenticate_port(connector);
 	if (ret < 0)
-- 
2.7.4

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[PATCH v14 08/32] drm: HDCP2.2 link check period

[Ramalingam C]

Time period for HDCP2.2 link check.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 include/drm/drm_hdcp.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index 7260b31af276..d4e98b11b4aa 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -13,6 +13,7 @@
 
 /* Period of hdcp checks (to ensure we're still authenticated) */
 #define DRM_HDCP_CHECK_PERIOD_MS		(128 * 16)
+#define DRM_HDCP2_CHECK_PERIOD_MS		500
 
 /* Shared lengths/masks between HDMI/DVI/DisplayPort */
 #define DRM_HDCP_AN_LEN				8
-- 
2.7.4

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[PATCH v14 09/32] drm/i915: Implement HDCP2.2 link integrity check

[Ramalingam C]

Implements the link integrity check once in 500mSec.

Once encryption is enabled, an ongoing Link Integrity Check is
performed by the HDCP Receiver to check that cipher synchronization
is maintained between the HDCP Transmitter and the HDCP Receiver.

On the detection of synchronization lost, the HDCP Receiver must assert
the corresponding bits of the RxStatus register. The Transmitter polls
the RxStatus register and it may initiate re-authentication.

v2:
  Rebased.
v3:
  enum check_link_response is used check the link status [Uma]
v4:
  Rebased as part of patch reordering.
v5:
  Required members of intel_hdcp is defined [Sean Paul]
v6:
  hdcp2_check_link is cancelled at required places.
v7:
  Rebased for the component i/f changes.
  Errors due to the sinks are reported as DEBUG logs.
v8:
  hdcp_check_work is used for both hdcp1 and hdcp2 check_link [Daniel]
  hdcp2.2 encryption status check is put under WARN_ON [Daniel]
  drm_hdcp.h changes are moved into separate patch [Daniel]
v9:
  enum check_link_status is defined at intel_drv.h [Daniel]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_drv.h  | 10 +++++
 drivers/gpu/drm/i915/intel_hdcp.c | 88 ++++++++++++++++++++++++++++++++++++---
 2 files changed, 93 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5797ee0078f2..dfedcc2b076c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -324,6 +324,13 @@ struct intel_panel {
 
 struct intel_digital_port;
 
+enum check_link_response {
+	HDCP_LINK_PROTECTED	= 0,
+	HDCP_TOPOLOGY_CHANGE,
+	HDCP_LINK_INTEGRITY_FAILURE,
+	HDCP_REAUTH_REQUEST
+};
+
 /*
  * This structure serves as a translation layer between the generic HDCP code
  * and the bus-specific code. What that means is that HDCP over HDMI differs
@@ -419,6 +426,9 @@ struct intel_hdcp_shim {
 	 */
 	int (*config_stream_type)(struct intel_digital_port *intel_dig_port,
 				  bool is_repeater, u8 type);
+
+	/* HDCP2.2 Link Integrity Check */
+	int (*check_2_2_link)(struct intel_digital_port *intel_dig_port);
 };
 
 struct intel_hdcp {
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 24051120d3bb..00fae3963caf 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -111,6 +111,16 @@ static inline bool intel_hdcp_in_use(struct intel_connector *connector)
 	return reg & HDCP_STATUS_ENC;
 }
 
+static inline bool intel_hdcp2_in_use(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	enum port port = connector->encoder->port;
+	u32 reg;
+
+	reg = I915_READ(HDCP2_STATUS_DDI(port));
+	return reg & LINK_ENCRYPTION_STATUS;
+}
+
 static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port,
 				    const struct intel_hdcp_shim *shim)
 {
@@ -1580,6 +1590,69 @@ static int _intel_hdcp2_disable(struct intel_connector *connector)
 	return ret;
 }
 
+/* Implements the Link Integrity Check for HDCP2.2 */
+static int intel_hdcp2_check_link(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	enum port port = connector->encoder->port;
+	int ret = 0;
+
+	mutex_lock(&hdcp->mutex);
+
+	/* hdcp2_check_link is expected only when HDCP2.2 is Enabled */
+	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_ENABLED ||
+	    !hdcp->hdcp2_encrypted) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (WARN_ON(!intel_hdcp2_in_use(connector))) {
+		DRM_ERROR("HDCP2.2 link stopped the encryption, %x\n",
+			  I915_READ(HDCP2_STATUS_DDI(port)));
+		ret = -ENXIO;
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+	ret = hdcp->shim->check_2_2_link(intel_dig_port);
+	if (ret == HDCP_LINK_PROTECTED) {
+		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] HDCP2.2 link failed, retrying auth\n",
+		      connector->base.name, connector->base.base.id);
+
+	ret = _intel_hdcp2_disable(connector);
+	if (ret) {
+		DRM_ERROR("[%s:%d] Failed to disable hdcp2.2 (%d)\n",
+			  connector->base.name, connector->base.base.id, ret);
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+	ret = _intel_hdcp2_enable(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("[%s:%d] Failed to enable hdcp2.2 (%d)\n",
+			      connector->base.name, connector->base.base.id,
+			      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),
@@ -1587,7 +1660,10 @@ static void intel_hdcp_check_work(struct work_struct *work)
 					       check_work);
 	struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
 
-	if (!intel_hdcp_check_link(connector))
+	if (!intel_hdcp2_check_link(connector))
+		schedule_delayed_work(&hdcp->check_work,
+				      DRM_HDCP2_CHECK_PERIOD_MS);
+	else if (!intel_hdcp_check_link(connector))
 		schedule_delayed_work(&hdcp->check_work,
 				      DRM_HDCP_CHECK_PERIOD_MS);
 }
@@ -1721,6 +1797,7 @@ int intel_hdcp_init(struct intel_connector *connector,
 int intel_hdcp_enable(struct intel_connector *connector)
 {
 	struct intel_hdcp *hdcp = &connector->hdcp;
+	unsigned long check_link_interval = DRM_HDCP_CHECK_PERIOD_MS;
 	int ret = -EINVAL;
 
 	if (!hdcp->shim)
@@ -1733,18 +1810,19 @@ int intel_hdcp_enable(struct intel_connector *connector)
 	 * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
 	 * is capable of HDCP2.2, it is preferred to use HDCP2.2.
 	 */
-	if (intel_hdcp2_capable(connector))
+	if (intel_hdcp2_capable(connector)) {
 		ret = _intel_hdcp2_enable(connector);
+		if (!ret)
+			check_link_interval = DRM_HDCP2_CHECK_PERIOD_MS;
+	}
 
 	/* When HDCP2.2 fails, HDCP1.4 will be attempted */
 	if (ret && intel_hdcp_capable(connector)) {
 		ret = _intel_hdcp_enable(connector);
-		if (!ret)
-			schedule_delayed_work(&hdcp->check_work,
-					      DRM_HDCP_CHECK_PERIOD_MS);
 	}
 
 	if (!ret) {
+		schedule_delayed_work(&hdcp->check_work, check_link_interval);
 		hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
 		schedule_work(&hdcp->prop_work);
 	}
-- 
2.7.4

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[PATCH v14 10/32] drm/i915: Handle HDCP2.2 downstream topology change

[Ramalingam C]

When repeater notifies a downstream topology change, this patch
reauthenticate the repeater alone without disabling the hdcp
encryption. If that fails then complete reauthentication is executed.

v2:
  Rebased.
v3:
  Typo in commit msg is fixed [Uma]
v4:
  Rebased as part of patch reordering.
  Minor style fixes.
v5:
  Rebased.
v6:
  Rebased.
v7:
  Errors due to sinks are reported as DEBUG logs.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_hdcp.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 00fae3963caf..fe0445c0eaac 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1626,8 +1626,24 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
 		goto out;
 	}
 
-	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 link failed, retrying auth\n",
-		      connector->base.name, connector->base.base.id);
+	if (ret == HDCP_TOPOLOGY_CHANGE) {
+		if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+			goto out;
+
+		DRM_DEBUG_KMS("HDCP2.2 Downstream topology change\n");
+		ret = hdcp2_authenticate_repeater_topology(connector);
+		if (!ret) {
+			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+			schedule_work(&hdcp->prop_work);
+			goto out;
+		}
+		DRM_DEBUG_KMS("[%s:%d] Repeater topology auth failed.(%d)\n",
+			      connector->base.name, connector->base.base.id,
+			      ret);
+	} else {
+		DRM_DEBUG_KMS("[%s:%d] HDCP2.2 link failed, retrying auth\n",
+			      connector->base.name, connector->base.base.id);
+	}
 
 	ret = _intel_hdcp2_disable(connector);
 	if (ret) {
-- 
2.7.4

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[PATCH v14 11/32] drm: removing the DP Errata msg and its msg id

[Ramalingam C]

Since DP ERRATA message is not defined at spec, those structure
definition is removed from drm_hdcp.h

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 include/drm/drm_hdcp.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index d4e98b11b4aa..f243408ecf26 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -69,7 +69,6 @@
 #define HDCP_2_2_REP_SEND_ACK			15
 #define HDCP_2_2_REP_STREAM_MANAGE		16
 #define HDCP_2_2_REP_STREAM_READY		17
-#define HDCP_2_2_ERRATA_DP_STREAM_TYPE		50
 
 #define HDCP_2_2_RTX_LEN			8
 #define HDCP_2_2_RRX_LEN			8
@@ -220,11 +219,6 @@ struct hdcp2_rep_stream_ready {
 	u8	m_prime[HDCP_2_2_MPRIME_LEN];
 } __packed;
 
-struct hdcp2_dp_errata_stream_type {
-	u8	msg_id;
-	u8	stream_type;
-} __packed;
-
 /* HDCP2.2 TIMEOUTs in mSec */
 #define HDCP_2_2_CERT_TIMEOUT_MS		100
 #define HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS	1000
-- 
2.7.4

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[PATCH v14 12/32] drm/i915: Implement the HDCP2.2 support for DP

[Ramalingam C]

Implements the DP adaptation specific HDCP2.2 functions.

These functions perform the DPCD read and write for communicating the
HDCP2.2 auth message back and forth.

v2:
  wait for cp_irq is merged with this patch. Rebased.
v3:
  wait_queue is used for wait for cp_irq [Chris Wilson]
v4:
  Style fixed.
  %s/PARING/PAIRING
  Few style fixes [Uma]
v5:
  Lookup table for DP HDCP2.2 msg details [Daniel].
  Extra lines are removed.
v6: Rebased.
v7:
  Fixed some regression introduced at v5. [Ankit]
  Macro HDCP_2_2_RX_CAPS_VERSION_VAL is reused [Uma]
  Converted a function to inline [Uma]
  %s/uintxx_t/uxx
v8:
  Error due to the sinks are reported as DEBUG logs.
  Adjust to the new mei interface.
v9:
  ARRAY_SIZE for no of array members [Jon & Daniel]
  return of the wait_for_cp_irq is made as void [Daniel]
  Wait for HDCP2.2 msg is done based on polling the reg bit than
    CP_IRQ based. [Daniel]
  hdcp adaptation is added as a const in the hdcp_shim [Daniel]
v10:
  config_stream_type is redefined [Daniel]
  DP Errata specific defines are moved into intel_dp.c.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Ankit K Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 333 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 333 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9f73a4239574..e9fe25f21200 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5847,6 +5847,333 @@ int intel_dp_hdcp_capable(struct intel_digital_port *intel_dig_port,
 	return 0;
 }
 
+struct hdcp2_dp_errata_stream_type {
+	u8	msg_id;
+	u8	stream_type;
+} __packed;
+
+static struct hdcp2_dp_msg_data {
+	u8 msg_id;
+	u32 offset;
+	bool msg_detectable;
+	u32 timeout;
+	u32 timeout2; /* Added for non_paired situation */
+	} hdcp2_msg_data[] = {
+		{HDCP_2_2_AKE_INIT, DP_HDCP_2_2_AKE_INIT_OFFSET, false, 0, 0},
+		{HDCP_2_2_AKE_SEND_CERT, DP_HDCP_2_2_AKE_SEND_CERT_OFFSET,
+				false, HDCP_2_2_CERT_TIMEOUT_MS, 0},
+		{HDCP_2_2_AKE_NO_STORED_KM, DP_HDCP_2_2_AKE_NO_STORED_KM_OFFSET,
+				false, 0, 0},
+		{HDCP_2_2_AKE_STORED_KM, DP_HDCP_2_2_AKE_STORED_KM_OFFSET,
+				false, 0, 0},
+		{HDCP_2_2_AKE_SEND_HPRIME, DP_HDCP_2_2_AKE_SEND_HPRIME_OFFSET,
+				true, HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS,
+				HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS},
+		{HDCP_2_2_AKE_SEND_PAIRING_INFO,
+				DP_HDCP_2_2_AKE_SEND_PAIRING_INFO_OFFSET, true,
+				HDCP_2_2_PAIRING_TIMEOUT_MS, 0},
+		{HDCP_2_2_LC_INIT, DP_HDCP_2_2_LC_INIT_OFFSET, false, 0, 0},
+		{HDCP_2_2_LC_SEND_LPRIME, DP_HDCP_2_2_LC_SEND_LPRIME_OFFSET,
+				false, HDCP_2_2_DP_LPRIME_TIMEOUT_MS, 0},
+		{HDCP_2_2_SKE_SEND_EKS, DP_HDCP_2_2_SKE_SEND_EKS_OFFSET, false,
+				0, 0},
+		{HDCP_2_2_REP_SEND_RECVID_LIST,
+				DP_HDCP_2_2_REP_SEND_RECVID_LIST_OFFSET, true,
+				HDCP_2_2_RECVID_LIST_TIMEOUT_MS, 0},
+		{HDCP_2_2_REP_SEND_ACK, DP_HDCP_2_2_REP_SEND_ACK_OFFSET, false,
+				0, 0},
+		{HDCP_2_2_REP_STREAM_MANAGE,
+				DP_HDCP_2_2_REP_STREAM_MANAGE_OFFSET, false,
+				0, 0},
+		{HDCP_2_2_REP_STREAM_READY, DP_HDCP_2_2_REP_STREAM_READY_OFFSET,
+				false, HDCP_2_2_STREAM_READY_TIMEOUT_MS, 0},
+/* local define to shovel this through the write_2_2 interface */
+#define HDCP_2_2_ERRATA_DP_STREAM_TYPE	50
+		{HDCP_2_2_ERRATA_DP_STREAM_TYPE,
+				DP_HDCP_2_2_REG_STREAM_TYPE_OFFSET, false,
+				0, 0},
+		};
+
+static inline
+int intel_dp_hdcp2_read_rx_status(struct intel_digital_port *intel_dig_port,
+				  u8 *rx_status)
+{
+	ssize_t ret;
+
+	ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
+			       DP_HDCP_2_2_REG_RXSTATUS_OFFSET, rx_status,
+			       HDCP_2_2_DP_RXSTATUS_LEN);
+	if (ret != HDCP_2_2_DP_RXSTATUS_LEN) {
+		DRM_DEBUG_KMS("Read bstatus from DP/AUX failed (%zd)\n", ret);
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	return 0;
+}
+
+static
+int hdcp2_detect_msg_availability(struct intel_digital_port *intel_dig_port,
+				  u8 msg_id, bool *msg_ready)
+{
+	u8 rx_status;
+	int ret;
+
+	*msg_ready = false;
+	ret = intel_dp_hdcp2_read_rx_status(intel_dig_port, &rx_status);
+	if (ret < 0)
+		return ret;
+
+	switch (msg_id) {
+	case HDCP_2_2_AKE_SEND_HPRIME:
+		if (HDCP_2_2_DP_RXSTATUS_H_PRIME(rx_status))
+			*msg_ready = true;
+		break;
+	case HDCP_2_2_AKE_SEND_PAIRING_INFO:
+		if (HDCP_2_2_DP_RXSTATUS_PAIRING(rx_status))
+			*msg_ready = true;
+		break;
+	case HDCP_2_2_REP_SEND_RECVID_LIST:
+		if (HDCP_2_2_DP_RXSTATUS_READY(rx_status))
+			*msg_ready = true;
+		break;
+	default:
+		DRM_ERROR("Unidentified msg_id: %d\n", msg_id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static ssize_t
+intel_dp_hdcp2_wait_for_msg(struct intel_digital_port *intel_dig_port,
+			    struct hdcp2_dp_msg_data *hdcp2_msg_data)
+{
+	struct intel_dp *dp = &intel_dig_port->dp;
+	struct intel_hdcp *hdcp = &dp->attached_connector->hdcp;
+	u8 msg_id = hdcp2_msg_data->msg_id;
+	int ret, timeout;
+	bool msg_ready = false;
+
+	if (msg_id == HDCP_2_2_AKE_SEND_HPRIME && !hdcp->is_paired)
+		timeout = hdcp2_msg_data->timeout2;
+	else
+		timeout = hdcp2_msg_data->timeout;
+
+	/*
+	 * There is no way to detect the CERT, LPRIME and STREAM_READY
+	 * availability. So Wait for timeout and read the msg.
+	 */
+	if (!hdcp2_msg_data->msg_detectable) {
+		mdelay(timeout);
+		ret = 0;
+	} else {
+		/* TODO: In case if you need to wait on CP_IRQ, do it here */
+		ret = __wait_for(ret =
+				 hdcp2_detect_msg_availability(intel_dig_port,
+							       msg_id,
+							       &msg_ready),
+				 !ret && msg_ready, timeout * 1000,
+				 1000, 5 * 1000);
+
+		if (!msg_ready)
+			ret = -ETIMEDOUT;
+	}
+
+	if (ret)
+		DRM_DEBUG_KMS("msg_id %d, ret %d, timeout(mSec): %d\n",
+			      hdcp2_msg_data->msg_id, ret, timeout);
+
+	return ret;
+}
+
+static struct hdcp2_dp_msg_data *get_hdcp2_dp_msg_data(u8 msg_id)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(hdcp2_msg_data); i++)
+		if (hdcp2_msg_data[i].msg_id == msg_id)
+			return &hdcp2_msg_data[i];
+
+	return NULL;
+}
+
+static
+int intel_dp_hdcp2_write_msg(struct intel_digital_port *intel_dig_port,
+			     void *buf, size_t size)
+{
+	unsigned int offset;
+	u8 *byte = buf;
+	ssize_t ret, bytes_to_write, len;
+	struct hdcp2_dp_msg_data *hdcp2_msg_data;
+
+	hdcp2_msg_data = get_hdcp2_dp_msg_data(*byte);
+	if (!hdcp2_msg_data)
+		return -EINVAL;
+
+	offset = hdcp2_msg_data->offset;
+
+	/* No msg_id in DP HDCP2.2 msgs */
+	bytes_to_write = size - 1;
+	byte++;
+
+	while (bytes_to_write) {
+		len = bytes_to_write > DP_AUX_MAX_PAYLOAD_BYTES ?
+				DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_write;
+
+		ret = drm_dp_dpcd_write(&intel_dig_port->dp.aux,
+					offset, (void *)byte, len);
+		if (ret < 0)
+			return ret;
+
+		bytes_to_write -= ret;
+		byte += ret;
+		offset += ret;
+	}
+
+	return size;
+}
+
+static
+ssize_t get_receiver_id_list_size(struct intel_digital_port *intel_dig_port)
+{
+	u8 rx_info[HDCP_2_2_RXINFO_LEN];
+	u32 dev_cnt;
+	ssize_t ret;
+
+	ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
+			       DP_HDCP_2_2_REG_RXINFO_OFFSET,
+			       (void *)rx_info, HDCP_2_2_RXINFO_LEN);
+	if (ret != HDCP_2_2_RXINFO_LEN)
+		return ret >= 0 ? -EIO : ret;
+
+	dev_cnt = (HDCP_2_2_DEV_COUNT_HI(rx_info[0]) << 4 |
+		   HDCP_2_2_DEV_COUNT_LO(rx_info[1]));
+
+	if (dev_cnt > HDCP_2_2_MAX_DEVICE_COUNT)
+		dev_cnt = HDCP_2_2_MAX_DEVICE_COUNT;
+
+	ret = sizeof(struct hdcp2_rep_send_receiverid_list) -
+		HDCP_2_2_RECEIVER_IDS_MAX_LEN +
+		(dev_cnt * HDCP_2_2_RECEIVER_ID_LEN);
+
+	return ret;
+}
+
+static
+int intel_dp_hdcp2_read_msg(struct intel_digital_port *intel_dig_port,
+			    u8 msg_id, void *buf, size_t size)
+{
+	unsigned int offset;
+	u8 *byte = buf;
+	ssize_t ret, bytes_to_recv, len;
+	struct hdcp2_dp_msg_data *hdcp2_msg_data;
+
+	hdcp2_msg_data = get_hdcp2_dp_msg_data(msg_id);
+	if (!hdcp2_msg_data)
+		return -EINVAL;
+	offset = hdcp2_msg_data->offset;
+
+	ret = intel_dp_hdcp2_wait_for_msg(intel_dig_port, hdcp2_msg_data);
+	if (ret < 0)
+		return ret;
+
+	if (msg_id == HDCP_2_2_REP_SEND_RECVID_LIST) {
+		ret = get_receiver_id_list_size(intel_dig_port);
+		if (ret < 0)
+			return ret;
+
+		size = ret;
+	}
+	bytes_to_recv = size - 1;
+
+	/* DP adaptation msgs has no msg_id */
+	byte++;
+
+	while (bytes_to_recv) {
+		len = bytes_to_recv > DP_AUX_MAX_PAYLOAD_BYTES ?
+		      DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_recv;
+
+		ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, offset,
+				       (void *)byte, len);
+		if (ret < 0) {
+			DRM_DEBUG_KMS("msg_id %d, ret %zd\n", msg_id, ret);
+			return ret;
+		}
+
+		bytes_to_recv -= ret;
+		byte += ret;
+		offset += ret;
+	}
+	byte = buf;
+	*byte = msg_id;
+
+	return size;
+}
+
+static
+int intel_dp_hdcp2_config_stream_type(struct intel_digital_port *intel_dig_port,
+				      bool is_repeater, u8 content_type)
+{
+	struct hdcp2_dp_errata_stream_type stream_type_msg;
+
+	if (is_repeater)
+		return 0;
+
+	/*
+	 * Errata for DP: As Stream type is used for encryption, Receiver
+	 * should be communicated with stream type for the decryption of the
+	 * content.
+	 * Repeater will be communicated with stream type as a part of it's
+	 * auth later in time.
+	 */
+	stream_type_msg.msg_id = HDCP_2_2_ERRATA_DP_STREAM_TYPE;
+	stream_type_msg.stream_type = content_type;
+
+	return intel_dp_hdcp2_write_msg(intel_dig_port, &stream_type_msg,
+					sizeof(stream_type_msg));
+}
+
+static
+int intel_dp_hdcp2_check_link(struct intel_digital_port *intel_dig_port)
+{
+	u8 rx_status;
+	int ret;
+
+	ret = intel_dp_hdcp2_read_rx_status(intel_dig_port, &rx_status);
+	if (ret)
+		return ret;
+
+	if (HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(rx_status))
+		ret = HDCP_REAUTH_REQUEST;
+	else if (HDCP_2_2_DP_RXSTATUS_LINK_FAILED(rx_status))
+		ret = HDCP_LINK_INTEGRITY_FAILURE;
+	else if (HDCP_2_2_DP_RXSTATUS_READY(rx_status))
+		ret = HDCP_TOPOLOGY_CHANGE;
+
+	return ret;
+}
+
+static
+int intel_dp_hdcp2_capable(struct intel_digital_port *intel_dig_port,
+			   bool *capable)
+{
+	u8 rx_caps[3];
+	int ret;
+
+	*capable = false;
+	ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
+			       DP_HDCP_2_2_REG_RX_CAPS_OFFSET,
+			       rx_caps, HDCP_2_2_RXCAPS_LEN);
+	if (ret != HDCP_2_2_RXCAPS_LEN)
+		return ret >= 0 ? -EIO : ret;
+
+	if (rx_caps[0] == HDCP_2_2_RX_CAPS_VERSION_VAL &&
+	    HDCP_2_2_DP_HDCP_CAPABLE(rx_caps[2]))
+		*capable = true;
+
+	return 0;
+}
+
 static const struct intel_hdcp_shim intel_dp_hdcp_shim = {
 	.write_an_aksv = intel_dp_hdcp_write_an_aksv,
 	.read_bksv = intel_dp_hdcp_read_bksv,
@@ -5859,6 +6186,12 @@ static const struct intel_hdcp_shim intel_dp_hdcp_shim = {
 	.toggle_signalling = intel_dp_hdcp_toggle_signalling,
 	.check_link = intel_dp_hdcp_check_link,
 	.hdcp_capable = intel_dp_hdcp_capable,
+	.write_2_2_msg = intel_dp_hdcp2_write_msg,
+	.read_2_2_msg = intel_dp_hdcp2_read_msg,
+	.config_stream_type = intel_dp_hdcp2_config_stream_type,
+	.check_2_2_link = intel_dp_hdcp2_check_link,
+	.hdcp_2_2_capable = intel_dp_hdcp2_capable,
+	.protocol = HDCP_PROTOCOL_DP,
 };
 
 static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
-- 
2.7.4

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[PATCH v14 13/32] drm/i915: Implement the HDCP2.2 support for HDMI

[Ramalingam C]

Implements the HDMI adaptation specific HDCP2.2 operations.

Basically these are DDC read and write for authenticating through
HDCP2.2 messages.

v2: Rebased.
v3:
  No more special handling of Gmbus burst read for AKE_SEND_CERT.
  Style fixed with few naming. [Uma]
  %s/PARING/PAIRING
v4:
  msg_sz is initialized at definition.
  Lookup table is defined for HDMI HDCP2.2 msgs [Daniel].
v5: Rebased.
v6:
  Make a function as inline [Uma]
  %s/uintxx_t/uxx
v7:
  Errors due to sinks are reported as DEBUG logs.
  Adjust to the new mei interface.
v8:
  ARRAY_SIZE for the # of array members [Jon & Daniel].
  hdcp adaptation is added as a const in the hdcp_shim [Daniel]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_hdmi.c | 189 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index faeedf76db99..6a3e400f54d7 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1129,6 +1129,190 @@ bool intel_hdmi_hdcp_check_link(struct intel_digital_port *intel_dig_port)
 	return true;
 }
 
+static struct hdcp2_hdmi_msg_data {
+	u8 msg_id;
+	u32 timeout;
+	u32 timeout2;
+	} hdcp2_msg_data[] = {
+		{HDCP_2_2_AKE_INIT, 0, 0},
+		{HDCP_2_2_AKE_SEND_CERT, HDCP_2_2_CERT_TIMEOUT_MS, 0},
+		{HDCP_2_2_AKE_NO_STORED_KM, 0, 0},
+		{HDCP_2_2_AKE_STORED_KM, 0, 0},
+		{HDCP_2_2_AKE_SEND_HPRIME, HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS,
+				HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS},
+		{HDCP_2_2_AKE_SEND_PAIRING_INFO, HDCP_2_2_PAIRING_TIMEOUT_MS,
+				0},
+		{HDCP_2_2_LC_INIT, 0, 0},
+		{HDCP_2_2_LC_SEND_LPRIME, HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS, 0},
+		{HDCP_2_2_SKE_SEND_EKS, 0, 0},
+		{HDCP_2_2_REP_SEND_RECVID_LIST,
+				HDCP_2_2_RECVID_LIST_TIMEOUT_MS, 0},
+		{HDCP_2_2_REP_SEND_ACK, 0, 0},
+		{HDCP_2_2_REP_STREAM_MANAGE, 0, 0},
+		{HDCP_2_2_REP_STREAM_READY, HDCP_2_2_STREAM_READY_TIMEOUT_MS,
+				0},
+	};
+
+static
+int intel_hdmi_hdcp2_read_rx_status(struct intel_digital_port *intel_dig_port,
+				    uint8_t *rx_status)
+{
+	return intel_hdmi_hdcp_read(intel_dig_port,
+				    HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET,
+				    rx_status,
+				    HDCP_2_2_HDMI_RXSTATUS_LEN);
+}
+
+static int get_hdcp2_msg_timeout(u8 msg_id, bool is_paired)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(hdcp2_msg_data); i++)
+		if (hdcp2_msg_data[i].msg_id == msg_id &&
+		    (msg_id != HDCP_2_2_AKE_SEND_HPRIME || is_paired))
+			return hdcp2_msg_data[i].timeout;
+		else if (hdcp2_msg_data[i].msg_id == msg_id)
+			return hdcp2_msg_data[i].timeout2;
+
+	return -EINVAL;
+}
+
+static inline
+int hdcp2_detect_msg_availability(struct intel_digital_port *intel_digital_port,
+				  u8 msg_id, bool *msg_ready,
+				  ssize_t *msg_sz)
+{
+	u8 rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
+	int ret;
+
+	ret = intel_hdmi_hdcp2_read_rx_status(intel_digital_port, rx_status);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("rx_status read failed. Err %d\n", ret);
+		return ret;
+	}
+
+	*msg_sz = ((HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(rx_status[1]) << 8) |
+		  rx_status[0]);
+
+	if (msg_id == HDCP_2_2_REP_SEND_RECVID_LIST)
+		*msg_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(rx_status[1]) &&
+			     *msg_sz);
+	else
+		*msg_ready = *msg_sz;
+
+	return 0;
+}
+
+static ssize_t
+intel_hdmi_hdcp2_wait_for_msg(struct intel_digital_port *intel_dig_port,
+			      u8 msg_id, bool paired)
+{
+	bool msg_ready = false;
+	int timeout, ret;
+	ssize_t msg_sz = 0;
+
+	timeout = get_hdcp2_msg_timeout(msg_id, paired);
+	if (timeout < 0)
+		return timeout;
+
+	ret = __wait_for(ret = hdcp2_detect_msg_availability(intel_dig_port,
+							     msg_id, &msg_ready,
+							     &msg_sz),
+			 !ret && msg_ready && msg_sz, timeout * 1000,
+			 1000, 5 * 1000);
+	if (ret)
+		DRM_DEBUG_KMS("msg_id: %d, ret: %d, timeout: %d\n",
+			      msg_id, ret, timeout);
+
+	return ret ? ret : msg_sz;
+}
+
+static
+int intel_hdmi_hdcp2_write_msg(struct intel_digital_port *intel_dig_port,
+			       void *buf, size_t size)
+{
+	unsigned int offset;
+
+	offset = HDCP_2_2_HDMI_REG_WR_MSG_OFFSET;
+	return intel_hdmi_hdcp_write(intel_dig_port, offset, buf, size);
+}
+
+static
+int intel_hdmi_hdcp2_read_msg(struct intel_digital_port *intel_dig_port,
+			      u8 msg_id, void *buf, size_t size)
+{
+	struct intel_hdmi *hdmi = &intel_dig_port->hdmi;
+	struct intel_hdcp *hdcp = &hdmi->attached_connector->hdcp;
+	unsigned int offset;
+	ssize_t ret;
+
+	ret = intel_hdmi_hdcp2_wait_for_msg(intel_dig_port, msg_id,
+					    hdcp->is_paired);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Available msg size should be equal to or lesser than the
+	 * available buffer.
+	 */
+	if (ret > size) {
+		DRM_DEBUG_KMS("msg_sz(%zd) is more than exp size(%zu)\n",
+			      ret, size);
+		return -1;
+	}
+
+	offset = HDCP_2_2_HDMI_REG_RD_MSG_OFFSET;
+	ret = intel_hdmi_hdcp_read(intel_dig_port, offset, buf, ret);
+	if (ret)
+		DRM_DEBUG_KMS("Failed to read msg_id: %d(%zd)\n", msg_id, ret);
+
+	return ret;
+}
+
+static
+int intel_hdmi_hdcp2_check_link(struct intel_digital_port *intel_dig_port)
+{
+	u8 rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
+	int ret;
+
+	ret = intel_hdmi_hdcp2_read_rx_status(intel_dig_port, rx_status);
+	if (ret)
+		return ret;
+
+	/*
+	 * Re-auth request and Link Integrity Failures are represented by
+	 * same bit. i.e reauth_req.
+	 */
+	if (HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(rx_status[1]))
+		ret = HDCP_REAUTH_REQUEST;
+	else if (HDCP_2_2_HDMI_RXSTATUS_READY(rx_status[1]))
+		ret = HDCP_TOPOLOGY_CHANGE;
+
+	return ret;
+}
+
+static
+int intel_hdmi_hdcp2_capable(struct intel_digital_port *intel_dig_port,
+			     bool *capable)
+{
+	u8 hdcp2_version;
+	int ret;
+
+	*capable = false;
+	ret = intel_hdmi_hdcp_read(intel_dig_port, HDCP_2_2_HDMI_REG_VER_OFFSET,
+				   &hdcp2_version, sizeof(hdcp2_version));
+	if (!ret && hdcp2_version & HDCP_2_2_HDMI_SUPPORT_MASK)
+		*capable = true;
+
+	return ret;
+}
+
+static inline
+enum hdcp_wired_protocol intel_hdmi_hdcp2_protocol(void)
+{
+	return HDCP_PROTOCOL_HDMI;
+}
+
 static const struct intel_hdcp_shim intel_hdmi_hdcp_shim = {
 	.write_an_aksv = intel_hdmi_hdcp_write_an_aksv,
 	.read_bksv = intel_hdmi_hdcp_read_bksv,
@@ -1140,6 +1324,11 @@ static const struct intel_hdcp_shim intel_hdmi_hdcp_shim = {
 	.read_v_prime_part = intel_hdmi_hdcp_read_v_prime_part,
 	.toggle_signalling = intel_hdmi_hdcp_toggle_signalling,
 	.check_link = intel_hdmi_hdcp_check_link,
+	.write_2_2_msg = intel_hdmi_hdcp2_write_msg,
+	.read_2_2_msg = intel_hdmi_hdcp2_read_msg,
+	.check_2_2_link	= intel_hdmi_hdcp2_check_link,
+	.hdcp_2_2_capable = intel_hdmi_hdcp2_capable,
+	.protocol = HDCP_PROTOCOL_HDMI,
 };
 
 static void intel_hdmi_prepare(struct intel_encoder *encoder,
-- 
2.7.4

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[PATCH v14 14/32] drm/i915: CP_IRQ handling for DP HDCP2.2 msgs

[Ramalingam C]

Implements the
	Waitqueue is created to wait for CP_IRQ
	Signaling the CP_IRQ arrival through atomic variable.
	For applicable DP HDCP2.2 msgs read wait for CP_IRQ.

As per HDCP2.2 spec "HDCP Transmitters must process CP_IRQ interrupts
when they are received from HDCP Receivers"

Without CP_IRQ processing, DP HDCP2.2 H_Prime msg was getting corrupted
while reading it based on corresponding status bit. This creates the
random failures in reading the DP HDCP2.2 msgs.

v2:
  CP_IRQ arrival is tracked based on the atomic val inc [daniel]
  Recording the reviewed-by Daniel from IRC.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_dp.c   | 31 +++++++++++++++++++++++--------
 drivers/gpu/drm/i915/intel_drv.h  |  8 ++++++++
 drivers/gpu/drm/i915/intel_hdcp.c | 11 ++++-------
 3 files changed, 35 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index e9fe25f21200..e1a051c0fbfe 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5623,6 +5623,18 @@ void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
 		edp_panel_vdd_off_sync(intel_dp);
 }
 
+static void intel_dp_hdcp_wait_for_cp_irq(struct intel_hdcp *hdcp, int timeout)
+{
+	long ret;
+
+#define C (hdcp->cp_irq_count_cached != atomic_read(&hdcp->cp_irq_count))
+	ret = wait_event_interruptible_timeout(hdcp->cp_irq_queue, C,
+					       msecs_to_jiffies(timeout));
+
+	if (!ret)
+		DRM_DEBUG_KMS("Timedout at waiting for CP_IRQ\n");
+}
+
 static
 int intel_dp_hdcp_write_an_aksv(struct intel_digital_port *intel_dig_port,
 				u8 *an)
@@ -5967,14 +5979,13 @@ intel_dp_hdcp2_wait_for_msg(struct intel_digital_port *intel_dig_port,
 		mdelay(timeout);
 		ret = 0;
 	} else {
-		/* TODO: In case if you need to wait on CP_IRQ, do it here */
-		ret = __wait_for(ret =
-				 hdcp2_detect_msg_availability(intel_dig_port,
-							       msg_id,
-							       &msg_ready),
-				 !ret && msg_ready, timeout * 1000,
-				 1000, 5 * 1000);
-
+		/*
+		 * As we want to check the msg availability at timeout, Ignoring
+		 * the timeout at wait for CP_IRQ.
+		 */
+		intel_dp_hdcp_wait_for_cp_irq(hdcp, timeout);
+		ret = hdcp2_detect_msg_availability(intel_dig_port,
+						    msg_id, &msg_ready);
 		if (!msg_ready)
 			ret = -ETIMEDOUT;
 	}
@@ -6001,6 +6012,8 @@ static
 int intel_dp_hdcp2_write_msg(struct intel_digital_port *intel_dig_port,
 			     void *buf, size_t size)
 {
+	struct intel_dp *dp = &intel_dig_port->dp;
+	struct intel_hdcp *hdcp = &dp->attached_connector->hdcp;
 	unsigned int offset;
 	u8 *byte = buf;
 	ssize_t ret, bytes_to_write, len;
@@ -6016,6 +6029,8 @@ int intel_dp_hdcp2_write_msg(struct intel_digital_port *intel_dig_port,
 	bytes_to_write = size - 1;
 	byte++;
 
+	hdcp->cp_irq_count_cached = atomic_read(&hdcp->cp_irq_count);
+
 	while (bytes_to_write) {
 		len = bytes_to_write > DP_AUX_MAX_PAYLOAD_BYTES ?
 				DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_write;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index dfedcc2b076c..1d1ef7f04f93 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -474,6 +474,14 @@ struct intel_hdcp {
 	 * over re-Auth has to be triggered.
 	 */
 	u32 seq_num_m;
+
+	/*
+	 * Work queue to signal the CP_IRQ. Used for the waiters to read the
+	 * available information from HDCP DP sink.
+	 */
+	wait_queue_head_t cp_irq_queue;
+	atomic_t cp_irq_count;
+	int cp_irq_count_cached;
 };
 
 struct intel_connector {
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index fe0445c0eaac..6178fe93f398 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1806,6 +1806,7 @@ int intel_hdcp_init(struct intel_connector *connector,
 
 	if (is_hdcp2_supported(dev_priv))
 		intel_hdcp2_init(connector);
+	init_waitqueue_head(&hdcp->cp_irq_queue);
 
 	return 0;
 }
@@ -1935,12 +1936,8 @@ void intel_hdcp_handle_cp_irq(struct intel_connector *connector)
 	if (!hdcp->shim)
 		return;
 
-	/*
-	 * CP_IRQ could be triggered due to 1. HDCP2.2 auth msgs availability,
-	 * 2. link failure and 3. repeater reauth request. At present we dont
-	 * handle the CP_IRQ for the HDCP2.2 auth msg availability for read.
-	 * To handle other two causes for CP_IRQ we have the work_fn which is
-	 * scheduled here.
-	 */
+	atomic_inc(&connector->hdcp.cp_irq_count);
+	wake_up_all(&connector->hdcp.cp_irq_queue);
+
 	schedule_delayed_work(&hdcp->check_work, 0);
 }
-- 
2.7.4

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[PATCH v14 15/32] drm/i915: Fix KBL HDCP2.2 encrypt status signalling

[Ramalingam C]

HDCP transmitter is supposed to indicate the HDCP encryption status of
the link through enc_en signals in a window of time called "window of
opportunity" defined by HDCP HDMI spec.

But on KBL this timing of signalling has an issue. To fix the issue this
WA of resetting the signalling is required.

v2:
  WA is moved into the toggle_signalling [Daniel]
v3:
  Commit msg is rewritten with more information
v4:
  Reviewed-by Daniel.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_hdmi.c | 42 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 6a3e400f54d7..c2c91e6645a5 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1083,10 +1083,44 @@ int intel_hdmi_hdcp_read_v_prime_part(struct intel_digital_port *intel_dig_port,
 	return ret;
 }
 
+static int kbl_repositioning_enc_en_signal(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_crtc *crtc = connector->base.state->crtc;
+	struct intel_crtc *intel_crtc = container_of(crtc,
+						     struct intel_crtc, base);
+	u32 scanline;
+	int ret;
+
+	for (;;) {
+		scanline = I915_READ(PIPEDSL(intel_crtc->pipe));
+		if (scanline > 100 && scanline < 200)
+			break;
+		usleep_range(25, 50);
+	}
+
+	ret = intel_ddi_toggle_hdcp_signalling(&intel_dig_port->base, false);
+	if (ret) {
+		DRM_ERROR("Disable HDCP signalling failed (%d)\n", ret);
+		return ret;
+	}
+	ret = intel_ddi_toggle_hdcp_signalling(&intel_dig_port->base, true);
+	if (ret) {
+		DRM_ERROR("Enable HDCP signalling failed (%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 static
 int intel_hdmi_hdcp_toggle_signalling(struct intel_digital_port *intel_dig_port,
 				      bool enable)
 {
+	struct intel_hdmi *hdmi = &intel_dig_port->hdmi;
+	struct intel_connector *connector = hdmi->attached_connector;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	int ret;
 
 	if (!enable)
@@ -1098,6 +1132,14 @@ int intel_hdmi_hdcp_toggle_signalling(struct intel_digital_port *intel_dig_port,
 			  enable ? "Enable" : "Disable", ret);
 		return ret;
 	}
+
+	/*
+	 * WA: To fix incorrect positioning of the window of
+	 * opportunity and enc_en signalling in KABYLAKE.
+	 */
+	if (IS_KABYLAKE(dev_priv) && enable)
+		return kbl_repositioning_enc_en_signal(connector);
+
 	return 0;
 }
 
-- 
2.7.4

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[PATCH v14 16/32] mei: bus: whitelist hdcp client

[Ramalingam C]

From: Tomas Winkler <tomas.winkler@intel.com>

Whitelist HDCP client for in kernel drm use

v2:
  Rebased.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/misc/mei/bus-fixup.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 80215c312f0e..5fcac02233af 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -40,6 +40,9 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
 #define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
 			0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
 
+#define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
+			      0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
+
 #define MEI_UUID_ANY NULL_UUID_LE
 
 /**
@@ -71,6 +74,18 @@ static void blacklist(struct mei_cl_device *cldev)
 	cldev->do_match = 0;
 }
 
+/**
+ * whitelist - forcefully whitelist client
+ *
+ * @cldev: me clients device
+ */
+static void whitelist(struct mei_cl_device *cldev)
+{
+	dev_dbg(&cldev->dev, "running hook %s\n", __func__);
+
+	cldev->do_match = 1;
+}
+
 #define OSTYPE_LINUX    2
 struct mei_os_ver {
 	__le16 build;
@@ -472,6 +487,7 @@ static struct mei_fixup {
 	MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
 	MEI_FIXUP(MEI_UUID_WD, mei_wd),
 	MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
+	MEI_FIXUP(MEI_UUID_HDCP, whitelist),
 };
 
 /**
-- 
2.7.4

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[PATCH v14 17/32] mei: bus: export to_mei_cl_device for mei client device drivers

[Ramalingam C]

From: Tomas Winkler <tomas.winkler@intel.com>

Export to_mei_cl_device macro, it is needed also in mei client drivers.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/misc/mei/bus.c     | 1 -
 include/linux/mei_cl_bus.h | 2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index fc3872fe7b25..e5456faf00e6 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -28,7 +28,6 @@
 #include "client.h"
 
 #define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver)
-#define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
 
 /**
  * __mei_cl_send - internal client send (write)
diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h
index 7fde40e17c8b..03b6ba2a63f8 100644
--- a/include/linux/mei_cl_bus.h
+++ b/include/linux/mei_cl_bus.h
@@ -55,6 +55,8 @@ struct mei_cl_device {
 	void *priv_data;
 };
 
+#define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
+
 struct mei_cl_driver {
 	struct device_driver driver;
 	const char *name;
-- 
2.7.4

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[PATCH v14 18/32] misc/mei/hdcp: Client driver for HDCP application

[Ramalingam C]

ME FW contributes a vital role in HDCP2.2 authentication.
HDCP2.2 driver needs to communicate to ME FW for each step of the
HDCP2.2 authentication.

ME FW prepare and HDCP2.2 authentication  parameters and encrypt them
as per spec. With such parameter Driver prepares HDCP2.2 auth messages
and communicate with HDCP2.2 sink.

Similarly HDCP2.2 sink's response is shared with ME FW for decrypt and
verification.

Once All the steps of HDCP2.2 authentications are complete on driver's
request ME FW will configure the port as authenticated and supply the
HDCP keys to the Gen HW for encryption.

Only after this stage HDCP2.2 driver can start the HDCP2.2 encryption
for a port.

ME FW is interfaced to kernel through MEI Bus Driver. To obtain the
HDCP2.2 services from the ME FW through MEI Bus driver MEI Client
Driver is developed.

v2:
  hdcp files are moved to drivers/misc/mei/hdcp/ [Tomas]
v3:
  Squashed the Kbuild support [Tomas]
  UUID renamed and Module License is modified [Tomas]
  drv_data is set to null at remove [Tomas]
v4:
  Module name is changed to "MEI HDCP"
  I915 Selects the MEI_HDCP
v5:
  Remove redundant text from the License header
  Fix malformed licence
  Removed the drv_data resetting.
v6:
  K-Doc addition. [Tomas]
v7:
  %s/UUID_LE/GUID_INIT [Tomas]
  GPL Ver is 2.0 than 2.0+ [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/Kconfig         |  7 +++++
 drivers/misc/mei/Makefile        |  2 ++
 drivers/misc/mei/hdcp/Makefile   |  7 +++++
 drivers/misc/mei/hdcp/mei_hdcp.c | 64 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 80 insertions(+)
 create mode 100644 drivers/misc/mei/hdcp/Makefile
 create mode 100644 drivers/misc/mei/hdcp/mei_hdcp.c

diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index c49e1d2269af..64a7b3483895 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -43,3 +43,10 @@ config INTEL_MEI_TXE
 
 	  Supported SoCs:
 	  Intel Bay Trail
+
+config INTEL_MEI_HDCP
+	tristate "Intel HDCP2.2 services of ME Interface"
+	select INTEL_MEI_ME
+	depends on DRM_I915
+	help
+	  MEI Support for HDCP2.2 Services on Intel platforms.
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index d9215fc4e499..8c2d9565a4cb 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -24,3 +24,5 @@ mei-txe-objs += hw-txe.o
 
 mei-$(CONFIG_EVENT_TRACING) += mei-trace.o
 CFLAGS_mei-trace.o = -I$(src)
+
+obj-$(CONFIG_INTEL_MEI_HDCP) += hdcp/
diff --git a/drivers/misc/mei/hdcp/Makefile b/drivers/misc/mei/hdcp/Makefile
new file mode 100644
index 000000000000..e27d10754dbf
--- /dev/null
+++ b/drivers/misc/mei/hdcp/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2017-2018, Intel Corporation.
+#
+# Makefile - HDCP client driver for Intel MEI Bus Driver.
+
+obj-$(CONFIG_INTEL_MEI_HDCP) += mei_hdcp.o
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
new file mode 100644
index 000000000000..8df069c1b0cc
--- /dev/null
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: (GPL-2.0)
+/*
+ * Copyright © 2017-2018 Intel Corporation
+ *
+ * Mei_hdcp.c: HDCP client driver for mei bus
+ *
+ * Author:
+ * Ramalingam C <ramalingam.c@intel.com>
+ */
+
+/**
+ * DOC: MEI_HDCP Client Driver
+ *
+ * This is a client driver to the mei_bus to make the HDCP2.2 services of
+ * ME FW available for the interested consumers like I915.
+ *
+ * This module will act as a translation layer between HDCP protocol
+ * implementor(I915) and ME FW by translating HDCP2.2 authentication
+ * messages to ME FW command payloads and vice versa.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/uuid.h>
+#include <linux/mei_cl_bus.h>
+
+static int mei_hdcp_probe(struct mei_cl_device *cldev,
+			  const struct mei_cl_device_id *id)
+{
+	int ret;
+
+	ret = mei_cldev_enable(cldev);
+	if (ret < 0)
+		dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
+
+	return ret;
+}
+
+static int mei_hdcp_remove(struct mei_cl_device *cldev)
+{
+	return mei_cldev_disable(cldev);
+}
+
+#define MEI_UUID_HDCP GUID_INIT(0xB638AB7E, 0x94E2, 0x4EA2, 0xA5, \
+				0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
+
+static struct mei_cl_device_id mei_hdcp_tbl[] = {
+	{ .uuid = MEI_UUID_HDCP, .version = MEI_CL_VERSION_ANY },
+	{ }
+};
+MODULE_DEVICE_TABLE(mei, mei_hdcp_tbl);
+
+static struct mei_cl_driver mei_hdcp_driver = {
+	.id_table = mei_hdcp_tbl,
+	.name = KBUILD_MODNAME,
+	.probe = mei_hdcp_probe,
+	.remove	= mei_hdcp_remove,
+};
+
+module_mei_cl_driver(mei_hdcp_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MEI HDCP");
-- 
2.7.4

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[PATCH v14 19/32] misc/mei/hdcp: Define ME FW interface for HDCP2.2

[Ramalingam C]

Defines the HDCP specific ME FW interfaces such as Request CMDs,
payload structure for CMDs and their response status codes.

This patch defines payload size(Excluding the Header)for each WIRED
HDCP2.2 CMDs.

v2: Rebased.
v3:
  Extra comments are removed.
v4:
  %s/\/\*\*/\/\*
v5:
  Extra lines are removed.
v6:
  Remove redundant text from the License header
  %s/LPRIME_HALF/V_PRIME_HALF
  %s/uintxx_t/uxx
v7:
  Extra taps removed.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Acked-by Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.h | 366 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 366 insertions(+)
 create mode 100644 drivers/misc/mei/hdcp/mei_hdcp.h

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.h b/drivers/misc/mei/hdcp/mei_hdcp.h
new file mode 100644
index 000000000000..582a7e27ae29
--- /dev/null
+++ b/drivers/misc/mei/hdcp/mei_hdcp.h
@@ -0,0 +1,366 @@
+/* SPDX-License-Identifier: (GPL-2.0+) */
+/*
+ * Copyright © 2017-2018 Intel Corporation
+ *
+ * Authors:
+ * Ramalingam C <ramalingam.c@intel.com>
+ */
+
+#ifndef __MEI_HDCP_H__
+#define __MEI_HDCP_H__
+
+#include <drm/drm_hdcp.h>
+
+/* me_hdcp_status: Enumeration of all HDCP Status Codes */
+enum me_hdcp_status {
+	ME_HDCP_STATUS_SUCCESS			= 0x0000,
+
+	/* WiDi Generic Status Codes */
+	ME_HDCP_STATUS_INTERNAL_ERROR		= 0x1000,
+	ME_HDCP_STATUS_UNKNOWN_ERROR		= 0x1001,
+	ME_HDCP_STATUS_INCORRECT_API_VERSION	= 0x1002,
+	ME_HDCP_STATUS_INVALID_FUNCTION		= 0x1003,
+	ME_HDCP_STATUS_INVALID_BUFFER_LENGTH	= 0x1004,
+	ME_HDCP_STATUS_INVALID_PARAMS		= 0x1005,
+	ME_HDCP_STATUS_AUTHENTICATION_FAILED	= 0x1006,
+
+	/* WiDi Status Codes */
+	ME_HDCP_INVALID_SESSION_STATE		= 0x6000,
+	ME_HDCP_SRM_FRAGMENT_UNEXPECTED		= 0x6001,
+	ME_HDCP_SRM_INVALID_LENGTH		= 0x6002,
+	ME_HDCP_SRM_FRAGMENT_OFFSET_INVALID	= 0x6003,
+	ME_HDCP_SRM_VERIFICATION_FAILED		= 0x6004,
+	ME_HDCP_SRM_VERSION_TOO_OLD		= 0x6005,
+	ME_HDCP_RX_CERT_VERIFICATION_FAILED	= 0x6006,
+	ME_HDCP_RX_REVOKED			= 0x6007,
+	ME_HDCP_H_VERIFICATION_FAILED		= 0x6008,
+	ME_HDCP_REPEATER_CHECK_UNEXPECTED	= 0x6009,
+	ME_HDCP_TOPOLOGY_MAX_EXCEEDED		= 0x600A,
+	ME_HDCP_V_VERIFICATION_FAILED		= 0x600B,
+	ME_HDCP_L_VERIFICATION_FAILED		= 0x600C,
+	ME_HDCP_STREAM_KEY_ALLOC_FAILED		= 0x600D,
+	ME_HDCP_BASE_KEY_RESET_FAILED		= 0x600E,
+	ME_HDCP_NONCE_GENERATION_FAILED		= 0x600F,
+	ME_HDCP_STATUS_INVALID_E_KEY_STATE	= 0x6010,
+	ME_HDCP_STATUS_INVALID_CS_ICV		= 0x6011,
+	ME_HDCP_STATUS_INVALID_KB_KEY_STATE	= 0x6012,
+	ME_HDCP_STATUS_INVALID_PAVP_MODE_ICV	= 0x6013,
+	ME_HDCP_STATUS_INVALID_PAVP_MODE	= 0x6014,
+	ME_HDCP_STATUS_LC_MAX_ATTEMPTS		= 0x6015,
+
+	/* New status for HDCP 2.1 */
+	ME_HDCP_STATUS_MISMATCH_IN_M		= 0x6016,
+
+	/* New status code for HDCP 2.2 Rx */
+	ME_HDCP_STATUS_RX_PROV_NOT_ALLOWED	= 0x6017,
+	ME_HDCP_STATUS_RX_PROV_WRONG_SUBJECT	= 0x6018,
+	ME_HDCP_RX_NEEDS_PROVISIONING		= 0x6019,
+	ME_HDCP_BKSV_ICV_AUTH_FAILED		= 0x6020,
+	ME_HDCP_STATUS_INVALID_STREAM_ID	= 0x6021,
+	ME_HDCP_STATUS_CHAIN_NOT_INITIALIZED	= 0x6022,
+	ME_HDCP_FAIL_NOT_EXPECTED		= 0x6023,
+	ME_HDCP_FAIL_HDCP_OFF			= 0x6024,
+	ME_HDCP_FAIL_INVALID_PAVP_MEMORY_MODE	= 0x6025,
+	ME_HDCP_FAIL_AES_ECB_FAILURE		= 0x6026,
+	ME_HDCP_FEATURE_NOT_SUPPORTED		= 0x6027,
+	ME_HDCP_DMA_READ_ERROR			= 0x6028,
+	ME_HDCP_DMA_WRITE_ERROR			= 0x6029,
+	ME_HDCP_FAIL_INVALID_PACKET_SIZE	= 0x6030,
+	ME_HDCP_H264_PARSING_ERROR		= 0x6031,
+	ME_HDCP_HDCP2_ERRATA_VIDEO_VIOLATION	= 0x6032,
+	ME_HDCP_HDCP2_ERRATA_AUDIO_VIOLATION	= 0x6033,
+	ME_HDCP_TX_ACTIVE_ERROR			= 0x6034,
+	ME_HDCP_MODE_CHANGE_ERROR		= 0x6035,
+	ME_HDCP_STREAM_TYPE_ERROR		= 0x6036,
+	ME_HDCP_STREAM_MANAGE_NOT_POSSIBLE	= 0x6037,
+
+	ME_HDCP_STATUS_PORT_INVALID_COMMAND	= 0x6038,
+	ME_HDCP_STATUS_UNSUPPORTED_PROTOCOL	= 0x6039,
+	ME_HDCP_STATUS_INVALID_PORT_INDEX	= 0x603a,
+	ME_HDCP_STATUS_TX_AUTH_NEEDED		= 0x603b,
+	ME_HDCP_STATUS_NOT_INTEGRATED_PORT	= 0x603c,
+	ME_HDCP_STATUS_SESSION_MAX_REACHED	= 0x603d,
+
+	/* hdcp capable bit is not set in rx_caps(error is unique to DP) */
+	ME_HDCP_STATUS_NOT_HDCP_CAPABLE		= 0x6041,
+
+	ME_HDCP_STATUS_INVALID_STREAM_COUNT	= 0x6042,
+};
+
+#define HDCP_API_VERSION				0x00010000
+
+#define HDCP_M_LEN					16
+#define HDCP_KH_LEN					16
+
+/* Payload Buffer size(Excluding Header) for CMDs and corresponding response */
+/* Wired_Tx_AKE  */
+#define	WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN	(4 + 1)
+#define	WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_OUT	(4 + 8 + 3)
+
+#define	WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN	(4 + 522 + 8 + 3)
+#define	WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_MIN_OUT	(4 + 1 + 3 + 16 + 16)
+#define	WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_MAX_OUT	(4 + 1 + 3 + 128)
+
+#define	WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN		(4 + 32)
+#define	WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_OUT		(4)
+
+#define	WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN		(4 + 16)
+#define	WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_OUT		(4)
+
+#define	WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN		(4)
+#define	WIRED_CMD_BUF_LEN_CLOSE_SESSION_OUT		(4)
+
+/* Wired_Tx_LC */
+#define	WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN	(4)
+#define	WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_OUT	(4 + 8)
+
+#define	WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN		(4 + 32)
+#define	WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_OUT		(4)
+
+/* Wired_Tx_SKE */
+#define	WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN		(4)
+#define	WIRED_CMD_BUF_LEN_GET_SESSION_KEY_OUT		(4 + 16 + 8)
+
+/* Wired_Tx_SKE */
+#define	WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN		(4 + 1)
+#define	WIRED_CMD_BUF_LEN_ENABLE_AUTH_OUT		(4)
+
+/* Wired_Tx_Repeater */
+#define	WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN		(4 + 2 + 3 + 16 + 155)
+#define	WIRED_CMD_BUF_LEN_VERIFY_REPEATER_OUT		(4 + 1 + 16)
+
+#define	WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN	(4 + 3 + \
+								32 + 2 + 2)
+
+#define	WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_OUT		(4)
+
+/* hdcp_command_id: Enumeration of all WIRED HDCP Command IDs */
+enum hdcp_command_id {
+	_WIDI_COMMAND_BASE		= 0x00030000,
+	WIDI_INITIATE_HDCP2_SESSION	= _WIDI_COMMAND_BASE,
+	HDCP_GET_SRM_STATUS,
+	HDCP_SEND_SRM_FRAGMENT,
+
+	/* The wired HDCP Tx commands */
+	_WIRED_COMMAND_BASE		= 0x00031000,
+	WIRED_INITIATE_HDCP2_SESSION	= _WIRED_COMMAND_BASE,
+	WIRED_VERIFY_RECEIVER_CERT,
+	WIRED_AKE_SEND_HPRIME,
+	WIRED_AKE_SEND_PAIRING_INFO,
+	WIRED_INIT_LOCALITY_CHECK,
+	WIRED_VALIDATE_LOCALITY,
+	WIRED_GET_SESSION_KEY,
+	WIRED_ENABLE_AUTH,
+	WIRED_VERIFY_REPEATER,
+	WIRED_REPEATER_AUTH_STREAM_REQ,
+	WIRED_CLOSE_SESSION,
+
+	_WIRED_COMMANDS_COUNT,
+};
+
+union encrypted_buff {
+	u8		e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
+	u8		e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
+	struct {
+		u8	e_kh_km[HDCP_KH_LEN];
+		u8	m[HDCP_M_LEN];
+	} __packed;
+};
+
+/* HDCP HECI message header. All header values are little endian. */
+struct hdcp_cmd_header {
+	u32			api_version;
+	u32			command_id;
+	enum me_hdcp_status	status;
+	/* Length of the HECI message (excluding the header) */
+	u32			buffer_len;
+} __packed;
+
+/* Empty command request or response. No data follows the header. */
+struct hdcp_cmd_no_data {
+	struct hdcp_cmd_header header;
+} __packed;
+
+/* Uniquely identifies the hdcp port being addressed for a given command. */
+struct hdcp_port_id {
+	u8	integrated_port_type;
+	u8	physical_port;
+	u16	reserved;
+} __packed;
+
+/*
+ * Data structures for integrated wired HDCP2 Tx in
+ * support of the AKE protocol
+ */
+/* HECI struct for integrated wired HDCP Tx session initiation. */
+struct wired_cmd_initiate_hdcp2_session_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			protocol; /* for HDMI vs DP */
+} __packed;
+
+struct wired_cmd_initiate_hdcp2_session_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			r_tx[HDCP_2_2_RTX_LEN];
+	struct hdcp2_tx_caps	tx_caps;
+} __packed;
+
+/* HECI struct for ending an integrated wired HDCP Tx session. */
+struct wired_cmd_close_session_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+struct wired_cmd_close_session_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+/* HECI struct for integrated wired HDCP Tx Rx Cert verification. */
+struct wired_cmd_verify_receiver_cert_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	struct hdcp2_cert_rx	cert_rx;
+	u8			r_rx[HDCP_2_2_RRX_LEN];
+	u8			rx_caps[HDCP_2_2_RXCAPS_LEN];
+} __packed;
+
+struct wired_cmd_verify_receiver_cert_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			km_stored;
+	u8			reserved[3];
+	union encrypted_buff	ekm_buff;
+} __packed;
+
+/* HECI struct for verification of Rx's Hprime in a HDCP Tx session */
+struct wired_cmd_ake_send_hprime_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			h_prime[HDCP_2_2_H_PRIME_LEN];
+} __packed;
+
+struct wired_cmd_ake_send_hprime_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+/*
+ * HECI struct for sending in AKE pairing data generated by the Rx in an
+ * integrated wired HDCP Tx session.
+ */
+struct wired_cmd_ake_send_pairing_info_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			e_kh_km[HDCP_2_2_E_KH_KM_LEN];
+} __packed;
+
+struct wired_cmd_ake_send_pairing_info_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+/* Data structures for integrated wired HDCP2 Tx in support of the LC protocol*/
+/*
+ * HECI struct for initiating locality check with an
+ * integrated wired HDCP Tx session.
+ */
+struct wired_cmd_init_locality_check_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+struct wired_cmd_init_locality_check_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			r_n[HDCP_2_2_RN_LEN];
+} __packed;
+
+/*
+ * HECI struct for validating an Rx's LPrime value in an
+ * integrated wired HDCP Tx session.
+ */
+struct wired_cmd_validate_locality_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			l_prime[HDCP_2_2_L_PRIME_LEN];
+} __packed;
+
+struct wired_cmd_validate_locality_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+/*
+ * Data structures for integrated wired HDCP2 Tx in support of the
+ * SKE protocol
+ */
+/* HECI struct for creating session key */
+struct wired_cmd_get_session_key_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+struct wired_cmd_get_session_key_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
+	u8			r_iv[HDCP_2_2_RIV_LEN];
+} __packed;
+
+/* HECI struct for the Tx enable authentication command */
+struct wired_cmd_enable_auth_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			stream_type;
+} __packed;
+
+struct wired_cmd_enable_auth_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+/*
+ * Data structures for integrated wired HDCP2 Tx in support of
+ * the repeater protocols
+ */
+/*
+ * HECI struct for verifying the downstream repeater's HDCP topology in an
+ * integrated wired HDCP Tx session.
+ */
+struct wired_cmd_verify_repeater_in {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			rx_info[HDCP_2_2_RXINFO_LEN];
+	u8			seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
+	u8			v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
+	u8			receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
+} __packed;
+
+struct wired_cmd_verify_repeater_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+	u8			content_type_supported;
+	u8			v[HDCP_2_2_V_PRIME_HALF_LEN];
+} __packed;
+
+/*
+ * HECI struct in support of stream management in an
+ * integrated wired HDCP Tx session.
+ */
+struct wired_cmd_repeater_auth_stream_req_in {
+	struct hdcp_cmd_header		header;
+	struct hdcp_port_id		port;
+	u8				seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
+	u8				m_prime[HDCP_2_2_MPRIME_LEN];
+	u16				k;
+	struct hdcp2_streamid_type	streams[1];
+} __packed;
+
+struct wired_cmd_repeater_auth_stream_req_out {
+	struct hdcp_cmd_header	header;
+	struct hdcp_port_id	port;
+} __packed;
+
+#endif /* __MEI_HDCP_H__ */
-- 
2.7.4

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[PATCH v14 20/32] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

[Ramalingam C]

Request ME FW to start the HDCP2.2 session for an intel port.
Prepares payloads for command WIRED_INITIATE_HDCP2_SESSION and sends
to ME FW.

On Success, ME FW will start a HDCP2.2 session for the port and
provides the content for HDCP2.2 AKE_Init message.

v2: Rebased.
v3:
  cldev is add as a separate parameter [Tomas]
  Redundant comment and typecast are removed [Tomas]
v4:
  %zd is used for size [Alexander]
  %s/return -1/return -EIO [Alexander]
  Spellings in commit msg is fixed [Uma]
v5: Rebased.
v6:
  Collected the rb-ed by.
  Realigning the patches in the series.
v7:
  Adjust to the new mei interface.
  Fix for kdoc.
v8:
  K-Doc Addition.
  memcpy for const length.
v9:
  s/mei_hdcp_ddi/mei_fw_ddi
  s/i915_port/mei_i915_port [Tomas]
  renamed func as mei_hdcp_* [Tomas]
  Instead of macro, inline func for ddi index is used. [Tomas]
v10:
  Switch case for the coversion between i915_port to mei_ddi [Tomas]
  Kernel doc fix.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 94 ++++++++++++++++++++++++++++++++++++++++
 drivers/misc/mei/hdcp/mei_hdcp.h | 11 +++++
 2 files changed, 105 insertions(+)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 8df069c1b0cc..952bae79dd02 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -23,6 +23,100 @@
 #include <linux/slab.h>
 #include <linux/uuid.h>
 #include <linux/mei_cl_bus.h>
+#include <drm/drm_connector.h>
+#include <drm/i915_component.h>
+#include <drm/i915_mei_hdcp_interface.h>
+
+#include "mei_hdcp.h"
+
+static inline u8 mei_get_ddi_index(enum port port)
+{
+	switch (port) {
+	case PORT_A:
+		return MEI_DDI_A;
+	case PORT_B ... PORT_F:
+		return (u8)port;
+	default:
+		return MEI_DDI_INVALID_PORT;
+	}
+}
+
+/**
+ * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @ake_data: AKE_Init msg output.
+ *
+ * Return:  0 on Success, <0 on Failure.
+ */
+static int
+mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
+			  struct hdcp2_ake_init *ake_data)
+{
+	struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } };
+	struct wired_cmd_initiate_hdcp2_session_out
+						session_init_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !ake_data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	session_init_in.header.api_version = HDCP_API_VERSION;
+	session_init_in.header.command_id = WIRED_INITIATE_HDCP2_SESSION;
+	session_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	session_init_in.header.buffer_len =
+				WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN;
+
+	session_init_in.port.integrated_port_type = data->port_type;
+	session_init_in.port.physical_port = mei_get_ddi_index(data->port);
+	session_init_in.protocol = data->protocol;
+
+	byte = mei_cldev_send(cldev, (u8 *)&session_init_in,
+			      sizeof(session_init_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&session_init_out,
+			      sizeof(session_init_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (session_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
+			WIRED_INITIATE_HDCP2_SESSION,
+			session_init_out.header.status);
+		return -EIO;
+	}
+
+	ake_data->msg_id = HDCP_2_2_AKE_INIT;
+	ake_data->tx_caps = session_init_out.tx_caps;
+	memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN);
+
+	return 0;
+}
+
+static __attribute__((unused))
+struct i915_hdcp_component_ops mei_hdcp_ops = {
+	.owner = THIS_MODULE,
+	.initiate_hdcp2_session = mei_hdcp_initiate_session,
+	.verify_receiver_cert_prepare_km = NULL,
+	.verify_hprime = NULL,
+	.store_pairing_info = NULL,
+	.initiate_locality_check = NULL,
+	.verify_lprime = NULL,
+	.get_session_key = NULL,
+	.repeater_check_flow_prepare_ack = NULL,
+	.verify_mprime = NULL,
+	.enable_hdcp_authentication = NULL,
+	.close_hdcp_session = NULL,
+};
 
 static int mei_hdcp_probe(struct mei_cl_device *cldev,
 			  const struct mei_cl_device_id *id)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.h b/drivers/misc/mei/hdcp/mei_hdcp.h
index 582a7e27ae29..1eca72a9c1c2 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.h
+++ b/drivers/misc/mei/hdcp/mei_hdcp.h
@@ -363,4 +363,15 @@ struct wired_cmd_repeater_auth_stream_req_out {
 	struct hdcp_port_id	port;
 } __packed;
 
+enum mei_fw_ddi {
+	MEI_DDI_INVALID_PORT = 0x0,
+
+	MEI_DDI_B = 1,
+	MEI_DDI_C,
+	MEI_DDI_D,
+	MEI_DDI_E,
+	MEI_DDI_F,
+	MEI_DDI_A = 7,
+	MEI_DDI_RANGE_END = MEI_DDI_A,
+};
 #endif /* __MEI_HDCP_H__ */
-- 
2.7.4

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[PATCH v14 21/32] misc/mei/hdcp: Verify Receiver Cert and prepare km

[Ramalingam C]

Requests for verification for receiver certification and also the
preparation for next AKE auth message with km.

On Success ME FW validate the HDCP2.2 receivers certificate and do the
revocation check on the receiver ID. AKE_Stored_Km will be prepared if
the receiver is already paired, else AKE_No_Stored_Km will be prepared.

Here AKE_Stored_Km and AKE_No_Stored_Km are HDCP2.2 protocol msgs.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd is used for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc Addition. [Tomas]
  memcpy for const length.
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  Fixed the conversion of u8 to bool [Tomas]
  K-Doc fix [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 83 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 82 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 952bae79dd02..922c6a76bb9f 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -102,11 +102,92 @@ mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
 	return 0;
 }
 
+/**
+ * mei_hdcp_verify_receiver_cert_prepare_km() - Verify the Receiver Certificate
+ * AKE_Send_Cert and prepare AKE_Stored_Km/AKE_No_Stored_Km
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @rx_cert: AKE_Send_Cert for verification
+ * @km_stored: Pairing status flag output
+ * @ek_pub_km: AKE_Stored_Km/AKE_No_Stored_Km output msg
+ * @msg_sz : size of AKE_XXXXX_Km output msg
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev,
+					 struct hdcp_port_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)
+{
+	struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = { { 0 } };
+	struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !rx_cert || !km_stored || !ek_pub_km || !msg_sz)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	verify_rxcert_in.header.api_version = HDCP_API_VERSION;
+	verify_rxcert_in.header.command_id = WIRED_VERIFY_RECEIVER_CERT;
+	verify_rxcert_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	verify_rxcert_in.header.buffer_len =
+				WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN;
+
+	verify_rxcert_in.port.integrated_port_type = data->port_type;
+	verify_rxcert_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	verify_rxcert_in.cert_rx = rx_cert->cert_rx;
+	memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN);
+	memcpy(verify_rxcert_in.rx_caps, rx_cert->rx_caps, HDCP_2_2_RXCAPS_LEN);
+
+	byte = mei_cldev_send(cldev, (u8 *)&verify_rxcert_in,
+			      sizeof(verify_rxcert_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed: %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&verify_rxcert_out,
+			      sizeof(verify_rxcert_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed: %zd\n", byte);
+		return byte;
+	}
+
+	if (verify_rxcert_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
+			WIRED_VERIFY_RECEIVER_CERT,
+			verify_rxcert_out.header.status);
+		return -EIO;
+	}
+
+	*km_stored = !!verify_rxcert_out.km_stored;
+	if (verify_rxcert_out.km_stored) {
+		ek_pub_km->msg_id = HDCP_2_2_AKE_STORED_KM;
+		*msg_sz = sizeof(struct hdcp2_ake_stored_km);
+	} else {
+		ek_pub_km->msg_id = HDCP_2_2_AKE_NO_STORED_KM;
+		*msg_sz = sizeof(struct hdcp2_ake_no_stored_km);
+	}
+
+	memcpy(ek_pub_km->e_kpub_km, &verify_rxcert_out.ekm_buff,
+	       sizeof(verify_rxcert_out.ekm_buff));
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
 	.initiate_hdcp2_session = mei_hdcp_initiate_session,
-	.verify_receiver_cert_prepare_km = NULL,
+	.verify_receiver_cert_prepare_km =
+				mei_hdcp_verify_receiver_cert_prepare_km,
 	.verify_hprime = NULL,
 	.store_pairing_info = NULL,
 	.initiate_locality_check = NULL,
-- 
2.7.4

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[PATCH v14 22/32] misc/mei/hdcp: Verify H_prime

[Ramalingam C]

Requests for the verification of AKE_Send_H_prime.

ME will calculate the H and comparing it with received H_Prime.
The result will be returned as status.

Here AKE_Send_H_prime is a HDCP2.2 Authentication msg.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Styles and typos fixed [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc Addition [Tomas]
  memcpy for const length.
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 58 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 57 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 922c6a76bb9f..0a4087a2efd5 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -182,13 +182,69 @@ mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_verify_hprime() - Verify AKE_Send_H_prime at ME FW.
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @rx_hprime: AKE_Send_H_prime msg for ME FW verification
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
+		       struct hdcp2_ake_send_hprime *rx_hprime)
+{
+	struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } };
+	struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !rx_hprime)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	send_hprime_in.header.api_version = HDCP_API_VERSION;
+	send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME;
+	send_hprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	send_hprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN;
+
+	send_hprime_in.port.integrated_port_type = data->port_type;
+	send_hprime_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,
+	       HDCP_2_2_H_PRIME_LEN);
+
+	byte = mei_cldev_send(cldev, (u8 *)&send_hprime_in,
+			      sizeof(send_hprime_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&send_hprime_out,
+			      sizeof(send_hprime_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (send_hprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
+			WIRED_AKE_SEND_HPRIME, send_hprime_out.header.status);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
 	.initiate_hdcp2_session = mei_hdcp_initiate_session,
 	.verify_receiver_cert_prepare_km =
 				mei_hdcp_verify_receiver_cert_prepare_km,
-	.verify_hprime = NULL,
+	.verify_hprime = mei_hdcp_verify_hprime,
 	.store_pairing_info = NULL,
 	.initiate_locality_check = NULL,
 	.verify_lprime = NULL,
-- 
2.7.4

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[PATCH v14 23/32] misc/mei/hdcp: Store the HDCP Pairing info

[Ramalingam C]

Provides Pairing info to ME to store.

Pairing is a process to fast track the subsequent authentication
with the same HDCP sink.

On Success, received HDCP pairing info is stored in non-volatile
memory of ME.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style fixed [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
  memcpy for const length.
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 60 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 0a4087a2efd5..1f5514244716 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -238,6 +238,64 @@ mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
 	return 0;
 }
 
+/**
+ * mei_hdcp_store_pairing_info() - Store pairing info received at ME FW
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @pairing_info: AKE_Send_Pairing_Info msg input to ME FW
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
+			    struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+	struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } };
+	struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !pairing_info)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	pairing_info_in.header.api_version = HDCP_API_VERSION;
+	pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO;
+	pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	pairing_info_in.header.buffer_len =
+					WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN;
+
+	pairing_info_in.port.integrated_port_type = data->port_type;
+	pairing_info_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
+	       HDCP_2_2_E_KH_KM_LEN);
+
+	byte = mei_cldev_send(cldev, (u8 *)&pairing_info_in,
+			      sizeof(pairing_info_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&pairing_info_out,
+			      sizeof(pairing_info_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (pairing_info_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X failed. Status: 0x%X\n",
+			WIRED_AKE_SEND_PAIRING_INFO,
+			pairing_info_out.header.status);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -245,7 +303,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.verify_receiver_cert_prepare_km =
 				mei_hdcp_verify_receiver_cert_prepare_km,
 	.verify_hprime = mei_hdcp_verify_hprime,
-	.store_pairing_info = NULL,
+	.store_pairing_info = mei_hdcp_store_pairing_info,
 	.initiate_locality_check = NULL,
 	.verify_lprime = NULL,
 	.get_session_key = NULL,
-- 
2.7.4

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[PATCH v14 24/32] misc/mei/hdcp: Initiate Locality check

[Ramalingam C]

Requests ME to start the second stage of HDCP2.2 authentication,
called Locality Check.

On Success, ME FW will provide LC_Init message to send to hdcp sink.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd used for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style fixed [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 57 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 56 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 1f5514244716..29ef61fd21d2 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -296,6 +296,61 @@ mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
 	return 0;
 }
 
+/**
+ * mei_hdcp_initiate_locality_check() - Prepare LC_Init
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @lc_init_data: LC_Init msg output
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_initiate_locality_check(struct device *dev,
+				 struct hdcp_port_data *data,
+				 struct hdcp2_lc_init *lc_init_data)
+{
+	struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } };
+	struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !lc_init_data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	lc_init_in.header.api_version = HDCP_API_VERSION;
+	lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK;
+	lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN;
+
+	lc_init_in.port.integrated_port_type = data->port_type;
+	lc_init_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&lc_init_out, sizeof(lc_init_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (lc_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X Failed. status: 0x%X\n",
+			WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status);
+		return -EIO;
+	}
+
+	lc_init_data->msg_id = HDCP_2_2_LC_INIT;
+	memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN);
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -304,7 +359,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 				mei_hdcp_verify_receiver_cert_prepare_km,
 	.verify_hprime = mei_hdcp_verify_hprime,
 	.store_pairing_info = mei_hdcp_store_pairing_info,
-	.initiate_locality_check = NULL,
+	.initiate_locality_check = mei_hdcp_initiate_locality_check,
 	.verify_lprime = NULL,
 	.get_session_key = NULL,
 	.repeater_check_flow_prepare_ack = NULL,
-- 
2.7.4

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[PATCH v14 25/32] misc/mei/hdcp: Verify L_prime

[Ramalingam C]

Request to ME to verify the LPrime received from HDCP sink.

On Success, ME FW will verify the received Lprime by calculating and
comparing with L.

This represents the completion of Locality Check.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style fixed [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
  memcpy for const length.
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 60 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 29ef61fd21d2..869a6f22f68d 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -351,6 +351,64 @@ mei_hdcp_initiate_locality_check(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_verify_lprime() - Verify lprime.
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @rx_lprime: LC_Send_L_prime msg for ME FW verification
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data,
+		       struct hdcp2_lc_send_lprime *rx_lprime)
+{
+	struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } };
+	struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !rx_lprime)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	verify_lprime_in.header.api_version = HDCP_API_VERSION;
+	verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY;
+	verify_lprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	verify_lprime_in.header.buffer_len =
+					WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN;
+
+	verify_lprime_in.port.integrated_port_type = data->port_type;
+	verify_lprime_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime,
+	       HDCP_2_2_L_PRIME_LEN);
+
+	byte = mei_cldev_send(cldev, (u8 *)&verify_lprime_in,
+			      sizeof(verify_lprime_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&verify_lprime_out,
+			      sizeof(verify_lprime_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (verify_lprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+			WIRED_VALIDATE_LOCALITY,
+			verify_lprime_out.header.status);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -360,7 +418,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.verify_hprime = mei_hdcp_verify_hprime,
 	.store_pairing_info = mei_hdcp_store_pairing_info,
 	.initiate_locality_check = mei_hdcp_initiate_locality_check,
-	.verify_lprime = NULL,
+	.verify_lprime = mei_hdcp_verify_lprime,
 	.get_session_key = NULL,
 	.repeater_check_flow_prepare_ack = NULL,
 	.verify_mprime = NULL,
-- 
2.7.4

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[PATCH v14 26/32] misc/mei/hdcp: Prepare Session Key

[Ramalingam C]

Request to ME to prepare the encrypted session key.

On Success, ME provides Encrypted session key. Function populates
the HDCP2.2 authentication msg SKE_Send_Eks.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style fixed [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 59 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 869a6f22f68d..fe5070f901e8 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -409,6 +409,63 @@ mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data,
 	return 0;
 }
 
+/**
+ * mei_hdcp_get_session_key() - Prepare SKE_Send_Eks.
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @ske_data: SKE_Send_Eks msg output from ME FW.
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int mei_hdcp_get_session_key(struct device *dev,
+				    struct hdcp_port_data *data,
+				    struct hdcp2_ske_send_eks *ske_data)
+{
+	struct wired_cmd_get_session_key_in get_skey_in = { { 0 } };
+	struct wired_cmd_get_session_key_out get_skey_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data || !ske_data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	get_skey_in.header.api_version = HDCP_API_VERSION;
+	get_skey_in.header.command_id = WIRED_GET_SESSION_KEY;
+	get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN;
+
+	get_skey_in.port.integrated_port_type = data->port_type;
+	get_skey_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out, sizeof(get_skey_out));
+
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+			WIRED_GET_SESSION_KEY, get_skey_out.header.status);
+		return -EIO;
+	}
+
+	ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;
+	memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,
+	       HDCP_2_2_E_DKEY_KS_LEN);
+	memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -419,7 +476,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.store_pairing_info = mei_hdcp_store_pairing_info,
 	.initiate_locality_check = mei_hdcp_initiate_locality_check,
 	.verify_lprime = mei_hdcp_verify_lprime,
-	.get_session_key = NULL,
+	.get_session_key = mei_hdcp_get_session_key,
 	.repeater_check_flow_prepare_ack = NULL,
 	.verify_mprime = NULL,
 	.enable_hdcp_authentication = NULL,
-- 
2.7.4

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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH v14 27/32] misc/mei/hdcp: Repeater topology verification and ack

[Ramalingam C]

Request ME to verify the downstream topology information received.

ME FW will validate the Repeaters receiver id list and
downstream topology.

On Success ME FW will provide the Least Significant
128bits of VPrime, which forms the repeater ack.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style and typos fixed [Uma]
v5: Rebased.
v6: Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 77 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 76 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index fe5070f901e8..c06a9805ac85 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -466,6 +466,80 @@ static int mei_hdcp_get_session_key(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_repeater_check_flow_prepare_ack() - Validate the Downstream topology
+ * and prepare rep_ack.
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @rep_topology: Receiver ID List to be validated
+ * @rep_send_ack : repeater ack from ME FW.
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_repeater_check_flow_prepare_ack(struct device *dev,
+					 struct hdcp_port_data *data,
+					 struct hdcp2_rep_send_receiverid_list
+							*rep_topology,
+					 struct hdcp2_rep_send_ack
+							*rep_send_ack)
+{
+	struct wired_cmd_verify_repeater_in verify_repeater_in = { { 0 } };
+	struct wired_cmd_verify_repeater_out verify_repeater_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !rep_topology || !rep_send_ack || !data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	verify_repeater_in.header.api_version = HDCP_API_VERSION;
+	verify_repeater_in.header.command_id = WIRED_VERIFY_REPEATER;
+	verify_repeater_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	verify_repeater_in.header.buffer_len =
+					WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN;
+
+	verify_repeater_in.port.integrated_port_type = data->port_type;
+	verify_repeater_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	memcpy(verify_repeater_in.rx_info, rep_topology->rx_info,
+	       HDCP_2_2_RXINFO_LEN);
+	memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v,
+	       HDCP_2_2_SEQ_NUM_LEN);
+	memcpy(verify_repeater_in.v_prime, rep_topology->v_prime,
+	       HDCP_2_2_V_PRIME_HALF_LEN);
+	memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids,
+	       HDCP_2_2_RECEIVER_IDS_MAX_LEN);
+
+	byte = mei_cldev_send(cldev, (u8 *)&verify_repeater_in,
+			      sizeof(verify_repeater_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&verify_repeater_out,
+			      sizeof(verify_repeater_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (verify_repeater_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+			WIRED_VERIFY_REPEATER,
+			verify_repeater_out.header.status);
+		return -EIO;
+	}
+
+	memcpy(rep_send_ack->v, verify_repeater_out.v,
+	       HDCP_2_2_V_PRIME_HALF_LEN);
+	rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK;
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -477,7 +551,8 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.initiate_locality_check = mei_hdcp_initiate_locality_check,
 	.verify_lprime = mei_hdcp_verify_lprime,
 	.get_session_key = mei_hdcp_get_session_key,
-	.repeater_check_flow_prepare_ack = NULL,
+	.repeater_check_flow_prepare_ack =
+				mei_hdcp_repeater_check_flow_prepare_ack,
 	.verify_mprime = NULL,
 	.enable_hdcp_authentication = NULL,
 	.close_hdcp_session = NULL,
-- 
2.7.4

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[PATCH v14 28/32] misc/mei/hdcp: Verify M_prime

[Ramalingam C]

Request to ME to verify the M_Prime received from the HDCP sink.

ME FW will calculate the M and compare with M_prime received
as part of RepeaterAuth_Stream_Ready, which is HDCP2.2 protocol msg.

On successful completion of this stage, downstream propagation of
the stream management info is completed.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  endianness conversion func is moved to drm_hdcp.h [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebasing.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
  drm_hdcp2_u32_to_seq_num() is used for u32 to seq_num.
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 67 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 66 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index c06a9805ac85..721376fc9bf1 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -540,6 +540,71 @@ mei_hdcp_repeater_check_flow_prepare_ack(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_verify_mprime() - Verify mprime.
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @stream_ready: RepeaterAuth_Stream_Ready msg for ME FW verification.
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int mei_hdcp_verify_mprime(struct device *dev,
+				  struct hdcp_port_data *data,
+				  struct hdcp2_rep_stream_ready *stream_ready)
+{
+	struct wired_cmd_repeater_auth_stream_req_in
+					verify_mprime_in = { { 0 } };
+	struct wired_cmd_repeater_auth_stream_req_out
+					verify_mprime_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !stream_ready || !data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	verify_mprime_in.header.api_version = HDCP_API_VERSION;
+	verify_mprime_in.header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
+	verify_mprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	verify_mprime_in.header.buffer_len =
+			WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN;
+
+	verify_mprime_in.port.integrated_port_type = data->port_type;
+	verify_mprime_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	memcpy(verify_mprime_in.m_prime, stream_ready->m_prime,
+	       HDCP_2_2_MPRIME_LEN);
+	drm_hdcp2_u32_to_seq_num(verify_mprime_in.seq_num_m, data->seq_num_m);
+	memcpy(verify_mprime_in.streams, data->streams,
+	       (data->k * sizeof(struct hdcp2_streamid_type)));
+
+	verify_mprime_in.k = __swab16(data->k);
+
+	byte = mei_cldev_send(cldev, (u8 *)&verify_mprime_in,
+			      sizeof(verify_mprime_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&verify_mprime_out,
+			      sizeof(verify_mprime_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (verify_mprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+			WIRED_REPEATER_AUTH_STREAM_REQ,
+			verify_mprime_out.header.status);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -553,7 +618,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.get_session_key = mei_hdcp_get_session_key,
 	.repeater_check_flow_prepare_ack =
 				mei_hdcp_repeater_check_flow_prepare_ack,
-	.verify_mprime = NULL,
+	.verify_mprime = mei_hdcp_verify_mprime,
 	.enable_hdcp_authentication = NULL,
 	.close_hdcp_session = NULL,
 };
-- 
2.7.4

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[PATCH v14 29/32] misc/mei/hdcp: Enabling the HDCP authentication

[Ramalingam C]

Request to ME to configure a port as authenticated.

On Success, ME FW will mark the port as authenticated and provides
HDCP cipher with the encryption keys.

Enabling the Authentication can be requested once all stages of
HDCP2.2 authentication is completed by interacting with ME FW.

Only after this stage, driver can enable the HDCP encryption for
the port, through HW registers.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style and typos fixed [Uma]
v5: Rebased.
v6:
  Collected the Rb-ed by.
  Rebased.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition. [Tomas]
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 55 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 721376fc9bf1..d8e04e0621a1 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -605,6 +605,59 @@ static int mei_hdcp_verify_mprime(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_enable_authentication() - Mark a port as authenticated
+ * through ME FW
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int mei_hdcp_enable_authentication(struct device *dev,
+					  struct hdcp_port_data *data)
+{
+	struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } };
+	struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	enable_auth_in.header.api_version = HDCP_API_VERSION;
+	enable_auth_in.header.command_id = WIRED_ENABLE_AUTH;
+	enable_auth_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	enable_auth_in.header.buffer_len = WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN;
+
+	enable_auth_in.port.integrated_port_type = data->port_type;
+	enable_auth_in.port.physical_port = mei_get_ddi_index(data->port);
+	enable_auth_in.stream_type = data->streams[0].stream_type;
+
+	byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in,
+			      sizeof(enable_auth_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&enable_auth_out,
+			      sizeof(enable_auth_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (enable_auth_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+			WIRED_ENABLE_AUTH, enable_auth_out.header.status);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -619,7 +672,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.repeater_check_flow_prepare_ack =
 				mei_hdcp_repeater_check_flow_prepare_ack,
 	.verify_mprime = mei_hdcp_verify_mprime,
-	.enable_hdcp_authentication = NULL,
+	.enable_hdcp_authentication = mei_hdcp_enable_authentication,
 	.close_hdcp_session = NULL,
 };
 
-- 
2.7.4

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[PATCH v14 30/32] misc/mei/hdcp: Closing wired HDCP2.2 Tx Session

[Ramalingam C]

Request the ME to terminate the HDCP2.2 session for a port.

On Success, ME FW will mark the intel port as Deauthenticated and
terminate the wired HDCP2.2 Tx session started due to the cmd
WIRED_INITIATE_HDCP2_SESSION.

v2: Rebased.
v3:
  cldev is passed as first parameter [Tomas]
  Redundant comments and cast are removed [Tomas]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style and typos fixed [Uma]
v5:
  Extra line is removed.
v6:
  Collected the Rb-ed by.
  Rebased.
v7:
  Adjust to the new mei interface.
  Fix for Kdoc.
v8:
  K-Doc addition.[Tomas]
v9:
  renamed func as mei_hdcp_* [Tomas]
  Inline function is defined for DDI index [Tomas]
v10:
  K-Doc fix. [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 55 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index d8e04e0621a1..2afc7d31dacc 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -658,6 +658,59 @@ static int mei_hdcp_enable_authentication(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port.
+ * This also disables the authenticated state of the port.
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
+{
+	struct wired_cmd_close_session_in session_close_in = { { 0 } };
+	struct wired_cmd_close_session_out session_close_out = { { 0 } };
+	struct mei_cl_device *cldev;
+	ssize_t byte;
+
+	if (!dev || !data)
+		return -EINVAL;
+
+	cldev = to_mei_cl_device(dev);
+
+	session_close_in.header.api_version = HDCP_API_VERSION;
+	session_close_in.header.command_id = WIRED_CLOSE_SESSION;
+	session_close_in.header.status = ME_HDCP_STATUS_SUCCESS;
+	session_close_in.header.buffer_len =
+				WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN;
+
+	session_close_in.port.integrated_port_type = data->port_type;
+	session_close_in.port.physical_port = mei_get_ddi_index(data->port);
+
+	byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
+			      sizeof(session_close_in));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+		return byte;
+	}
+
+	byte = mei_cldev_recv(cldev, (u8 *)&session_close_out,
+			      sizeof(session_close_out));
+	if (byte < 0) {
+		dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+		return byte;
+	}
+
+	if (session_close_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+		dev_dbg(dev, "Session Close Failed. status: 0x%X\n",
+			session_close_out.header.status);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
@@ -673,7 +726,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 				mei_hdcp_repeater_check_flow_prepare_ack,
 	.verify_mprime = mei_hdcp_verify_mprime,
 	.enable_hdcp_authentication = mei_hdcp_enable_authentication,
-	.close_hdcp_session = NULL,
+	.close_hdcp_session = mei_hdcp_close_session,
 };
 
 static int mei_hdcp_probe(struct mei_cl_device *cldev,
-- 
2.7.4

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[PATCH v14 31/32] misc/mei/hdcp: Component framework for I915 Interface

[Ramalingam C]

Mei hdcp driver is designed as component slave for the I915 component
master.

v2: Rebased.
v3:
  Notifier chain is adopted for cldev state update [Tomas]
v4:
  Made static dummy functions as inline in mei_hdcp.h
  API for polling client device status
  IS_ENABLED used in header, for config status for mei_hdcp.
v5:
  Replacing the notifier with component framework. [Daniel]
v6:
  Rebased on the I915 comp master redesign.
v7:
  mei_hdcp_component_registered is made static [Uma]
  Need for global static variable mei_cldev is removed.
v8:
  master comp is added to be matched with i915 subcomponent [daniel]
v9:
  only comp_master is set and retrieved as driver_data [Daniel]
  Reviewed-by Daniel.
v10:
  small corrections at probe [Tomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 82 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 80 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 2afc7d31dacc..ad55b41550d6 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -23,6 +23,7 @@
 #include <linux/slab.h>
 #include <linux/uuid.h>
 #include <linux/mei_cl_bus.h>
+#include <linux/component.h>
 #include <drm/drm_connector.h>
 #include <drm/i915_component.h>
 #include <drm/i915_mei_hdcp_interface.h>
@@ -711,8 +712,7 @@ mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
 	return 0;
 }
 
-static __attribute__((unused))
-struct i915_hdcp_component_ops mei_hdcp_ops = {
+static struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
 	.initiate_hdcp2_session = mei_hdcp_initiate_session,
 	.verify_receiver_cert_prepare_km =
@@ -729,20 +729,98 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.close_hdcp_session = mei_hdcp_close_session,
 };
 
+static int mei_component_master_bind(struct device *dev)
+{
+	struct mei_cl_device *cldev = to_mei_cl_device(dev);
+	struct i915_hdcp_comp_master *comp_master =
+						mei_cldev_get_drvdata(cldev);
+	int ret;
+
+	dev_info(dev, "%s\n", __func__);
+	comp_master->ops = &mei_hdcp_ops;
+	comp_master->mei_dev = dev;
+	ret = component_bind_all(dev, comp_master);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static void mei_component_master_unbind(struct device *dev)
+{
+	struct mei_cl_device *cldev = to_mei_cl_device(dev);
+	struct i915_hdcp_comp_master *comp_master =
+						mei_cldev_get_drvdata(cldev);
+
+	dev_info(dev, "%s\n", __func__);
+	component_unbind_all(dev, comp_master);
+}
+
+static const struct component_master_ops mei_component_master_ops = {
+	.bind = mei_component_master_bind,
+	.unbind = mei_component_master_unbind,
+};
+
+static int mei_hdcp_component_match(struct device *dev, int subcomponent,
+				    void *data)
+{
+	return !strcmp(dev->driver->name, "i915") &&
+	       subcomponent == I915_COMPONENT_HDCP;
+}
+
 static int mei_hdcp_probe(struct mei_cl_device *cldev,
 			  const struct mei_cl_device_id *id)
 {
+	struct i915_hdcp_comp_master *comp_master;
+	struct component_match *master_match;
 	int ret;
 
 	ret = mei_cldev_enable(cldev);
 	if (ret < 0)
 		dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
 
+	comp_master = kzalloc(sizeof(*comp_master), GFP_KERNEL);
+	if (!comp_master) {
+		ret = -ENOMEM;
+		goto err_exit;
+	}
+
+	master_match = NULL;
+	component_match_add_typed(&cldev->dev, &master_match,
+				  mei_hdcp_component_match, comp_master);
+	if (IS_ERR_OR_NULL(master_match)) {
+		ret = -ENOMEM;
+		goto err_exit;
+	}
+
+	mei_cldev_set_drvdata(cldev, comp_master);
+	ret = component_master_add_with_match(&cldev->dev,
+					      &mei_component_master_ops,
+					      master_match);
+	if (ret < 0) {
+		dev_err(&cldev->dev, "Master comp add failed %d\n", ret);
+		goto err_exit;
+	}
+
+	return 0;
+
+err_exit:
+	mei_cldev_set_drvdata(cldev, NULL);
+	kfree(comp_master);
+	mei_cldev_disable(cldev);
+
 	return ret;
 }
 
 static int mei_hdcp_remove(struct mei_cl_device *cldev)
 {
+	struct i915_hdcp_comp_master *comp_master =
+						mei_cldev_get_drvdata(cldev);
+
+	component_master_del(&cldev->dev, &mei_component_master_ops);
+	kfree(comp_master);
+	mei_cldev_set_drvdata(cldev, NULL);
+
 	return mei_cldev_disable(cldev);
 }
 
-- 
2.7.4

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[PATCH v14 32/32] FOR_TEST_ONLY: i915/Kconfig: Select mei_hdcp by I915

[Ramalingam C]

FOR TESTING PURPOSE ONLY.

By default INTEL_MEI_HDCP is set to y. This patch is created to
test the interface between I915 and MEI_HDCP.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/misc/mei/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index 64a7b3483895..e5defb2e1557 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -48,5 +48,6 @@ config INTEL_MEI_HDCP
 	tristate "Intel HDCP2.2 services of ME Interface"
 	select INTEL_MEI_ME
 	depends on DRM_I915
+	default y
 	help
 	  MEI Support for HDCP2.2 Services on Intel platforms.
-- 
2.7.4

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✗ Fi.CI.BAT: failure for drm/i915: Implement HDCP2.2

[Patchwork]

== Series Details ==

Series: drm/i915: Implement HDCP2.2
URL   : https://patchwork.freedesktop.org/series/56757/
State : failure

== Summary ==

CALL    scripts/checksyscalls.sh
  DESCEND  objtool
  CHK     include/generated/compile.h
  CC [M]  drivers/gpu/drm/i915/intel_hdcp.o
In file included from ./include/drm/i915_component.h:27:0,
                 from drivers/gpu/drm/i915/intel_hdcp.c:10:
./include/drm/drm_audio_component.h:25:36: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  unsigned long (*get_power)(struct device *);
                                    ^~~~~~
./include/drm/drm_audio_component.h:31:27: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  void (*put_power)(struct device *, unsigned long);
                           ^~~~~~
./include/drm/drm_audio_component.h:35:37: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  void (*codec_wake_override)(struct device *, bool enable);
                                     ^~~~~~
./include/drm/drm_audio_component.h:39:31: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  int (*get_cdclk_freq)(struct device *);
                               ^~~~~~
./include/drm/drm_audio_component.h:46:32: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
                                ^~~~~~
./include/drm/drm_audio_component.h:59:24: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
                        ^~~~~~
./include/drm/drm_audio_component.h:93:28: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  int (*master_bind)(struct device *dev, struct drm_audio_component *);
                            ^~~~~~
./include/drm/drm_audio_component.h:100:31: error: ‘struct device’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
  void (*master_unbind)(struct device *dev, struct drm_audio_component *);
                               ^~~~~~
cc1: all warnings being treated as errors
scripts/Makefile.build:276: recipe for target 'drivers/gpu/drm/i915/intel_hdcp.o' failed
make[4]: *** [drivers/gpu/drm/i915/intel_hdcp.o] Error 1
scripts/Makefile.build:492: recipe for target 'drivers/gpu/drm/i915' failed
make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:492: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:492: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1043: recipe for target 'drivers' failed
make: *** [drivers] Error 2

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Re: [Intel-gfx] [PATCH v14 03/32] drm/i915: MEI interface implementation

[kbuild test robot via dri-devel]

[-- Attachment #1: Type: text/plain, Size: 9882 bytes --]

Hi Ramalingam,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on next-20190215]
[cannot apply to v5.0-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Ramalingam-C/drm-i915-Implement-HDCP2-2/20190216-090245
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-x007-201906 (attached as .config)
compiler: gcc-8 (Debian 8.2.0-20) 8.2.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from include/drm/i915_component.h:27,
                    from drivers/gpu/drm/i915/intel_hdcp.c:10:
>> include/drm/drm_audio_component.h:22:27: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*get_power)(struct device *);
                              ^~~~~~
   include/drm/drm_audio_component.h:28:27: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*put_power)(struct device *);
                              ^~~~~~
   include/drm/drm_audio_component.h:32:37: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*codec_wake_override)(struct device *, bool enable);
                                        ^~~~~~
   include/drm/drm_audio_component.h:36:31: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*get_cdclk_freq)(struct device *);
                                  ^~~~~~
   include/drm/drm_audio_component.h:43:32: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
                                   ^~~~~~
   include/drm/drm_audio_component.h:56:24: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
                           ^~~~~~
   include/drm/drm_audio_component.h:90:28: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*master_bind)(struct device *dev, struct drm_audio_component *);
                               ^~~~~~
   include/drm/drm_audio_component.h:97:31: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*master_unbind)(struct device *dev, struct drm_audio_component *);
                                  ^~~~~~
   In file included from drivers/gpu/drm/i915/intel_drv.h:34,
                    from drivers/gpu/drm/i915/intel_hdcp.c:15:
   drivers/gpu/drm/i915/i915_drv.h:58:10: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
    #include <drm/i915_mei_hdcp_interface.h>
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.
--
   In file included from include/drm/i915_component.h:27,
                    from drivers/gpu//drm/i915/intel_hdcp.c:10:
>> include/drm/drm_audio_component.h:22:27: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*get_power)(struct device *);
                              ^~~~~~
   include/drm/drm_audio_component.h:28:27: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*put_power)(struct device *);
                              ^~~~~~
   include/drm/drm_audio_component.h:32:37: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*codec_wake_override)(struct device *, bool enable);
                                        ^~~~~~
   include/drm/drm_audio_component.h:36:31: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*get_cdclk_freq)(struct device *);
                                  ^~~~~~
   include/drm/drm_audio_component.h:43:32: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
                                   ^~~~~~
   include/drm/drm_audio_component.h:56:24: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
                           ^~~~~~
   include/drm/drm_audio_component.h:90:28: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*master_bind)(struct device *dev, struct drm_audio_component *);
                               ^~~~~~
   include/drm/drm_audio_component.h:97:31: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*master_unbind)(struct device *dev, struct drm_audio_component *);
                                  ^~~~~~
   In file included from drivers/gpu//drm/i915/intel_drv.h:34,
                    from drivers/gpu//drm/i915/intel_hdcp.c:15:
   drivers/gpu//drm/i915/i915_drv.h:58:10: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
    #include <drm/i915_mei_hdcp_interface.h>
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.

vim +22 include/drm/drm_audio_component.h

a57942bf Takashi Iwai 2018-07-11   8  
ae891abe Takashi Iwai 2018-07-11   9  /**
ae891abe Takashi Iwai 2018-07-11  10   * struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver
ae891abe Takashi Iwai 2018-07-11  11   */
ae891abe Takashi Iwai 2018-07-11  12  struct drm_audio_component_ops {
ae891abe Takashi Iwai 2018-07-11  13  	/**
ae891abe Takashi Iwai 2018-07-11  14  	 * @owner: drm module to pin down
ae891abe Takashi Iwai 2018-07-11  15  	 */
ae891abe Takashi Iwai 2018-07-11  16  	struct module *owner;
ae891abe Takashi Iwai 2018-07-11  17  	/**
ae891abe Takashi Iwai 2018-07-11  18  	 * @get_power: get the POWER_DOMAIN_AUDIO power well
ae891abe Takashi Iwai 2018-07-11  19  	 *
ae891abe Takashi Iwai 2018-07-11  20  	 * Request the power well to be turned on.
ae891abe Takashi Iwai 2018-07-11  21  	 */
ae891abe Takashi Iwai 2018-07-11 @22  	void (*get_power)(struct device *);
ae891abe Takashi Iwai 2018-07-11  23  	/**
ae891abe Takashi Iwai 2018-07-11  24  	 * @put_power: put the POWER_DOMAIN_AUDIO power well
ae891abe Takashi Iwai 2018-07-11  25  	 *
ae891abe Takashi Iwai 2018-07-11  26  	 * Allow the power well to be turned off.
ae891abe Takashi Iwai 2018-07-11  27  	 */
ae891abe Takashi Iwai 2018-07-11  28  	void (*put_power)(struct device *);
ae891abe Takashi Iwai 2018-07-11  29  	/**
ae891abe Takashi Iwai 2018-07-11  30  	 * @codec_wake_override: Enable/disable codec wake signal
ae891abe Takashi Iwai 2018-07-11  31  	 */
ae891abe Takashi Iwai 2018-07-11  32  	void (*codec_wake_override)(struct device *, bool enable);
ae891abe Takashi Iwai 2018-07-11  33  	/**
ae891abe Takashi Iwai 2018-07-11  34  	 * @get_cdclk_freq: Get the Core Display Clock in kHz
ae891abe Takashi Iwai 2018-07-11  35  	 */
ae891abe Takashi Iwai 2018-07-11  36  	int (*get_cdclk_freq)(struct device *);
ae891abe Takashi Iwai 2018-07-11  37  	/**
ae891abe Takashi Iwai 2018-07-11  38  	 * @sync_audio_rate: set n/cts based on the sample rate
ae891abe Takashi Iwai 2018-07-11  39  	 *
ae891abe Takashi Iwai 2018-07-11  40  	 * Called from audio driver. After audio driver sets the
ae891abe Takashi Iwai 2018-07-11  41  	 * sample rate, it will call this function to set n/cts
ae891abe Takashi Iwai 2018-07-11  42  	 */
ae891abe Takashi Iwai 2018-07-11  43  	int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
ae891abe Takashi Iwai 2018-07-11  44  	/**
ae891abe Takashi Iwai 2018-07-11  45  	 * @get_eld: fill the audio state and ELD bytes for the given port
ae891abe Takashi Iwai 2018-07-11  46  	 *
ae891abe Takashi Iwai 2018-07-11  47  	 * Called from audio driver to get the HDMI/DP audio state of the given
ae891abe Takashi Iwai 2018-07-11  48  	 * digital port, and also fetch ELD bytes to the given pointer.
ae891abe Takashi Iwai 2018-07-11  49  	 *
ae891abe Takashi Iwai 2018-07-11  50  	 * It returns the byte size of the original ELD (not the actually
ae891abe Takashi Iwai 2018-07-11  51  	 * copied size), zero for an invalid ELD, or a negative error code.
ae891abe Takashi Iwai 2018-07-11  52  	 *
ae891abe Takashi Iwai 2018-07-11  53  	 * Note that the returned size may be over @max_bytes.  Then it
ae891abe Takashi Iwai 2018-07-11  54  	 * implies that only a part of ELD has been copied to the buffer.
ae891abe Takashi Iwai 2018-07-11  55  	 */
ae891abe Takashi Iwai 2018-07-11  56  	int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
ae891abe Takashi Iwai 2018-07-11  57  		       unsigned char *buf, int max_bytes);
ae891abe Takashi Iwai 2018-07-11  58  };
ae891abe Takashi Iwai 2018-07-11  59  

:::::: The code at line 22 was first introduced by commit
:::::: ae891abe7c2ccf75b69ca8330225e37ecc06924e drm/i915: Split audio component to a generic type

:::::: TO: Takashi Iwai <tiwai@suse.de>
:::::: CC: Takashi Iwai <tiwai@suse.de>

---
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Re: [PATCH v14 20/32] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

[kbuild test robot]

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Hi Ramalingam,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[cannot apply to v5.0-rc4 next-20190215]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Ramalingam-C/drm-i915-Implement-HDCP2-2/20190216-090245
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-defconfig (attached as .config)
compiler: gcc-8 (Debian 8.2.0-20) 8.2.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> drivers/misc/mei/hdcp/mei_hdcp.c:28:10: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
    #include <drm/i915_mei_hdcp_interface.h>
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.
--
   In file included from drivers/gpu/drm/i915/i915_drv.c:50:
>> drivers/gpu/drm/i915/i915_drv.h:58:10: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
    #include <drm/i915_mei_hdcp_interface.h>
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.
--
   In file included from include/drm/i915_component.h:27,
                    from drivers/gpu/drm/i915/intel_hdcp.c:10:
   include/drm/drm_audio_component.h:22:27: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*get_power)(struct device *);
                              ^~~~~~
   include/drm/drm_audio_component.h:28:27: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*put_power)(struct device *);
                              ^~~~~~
   include/drm/drm_audio_component.h:32:37: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*codec_wake_override)(struct device *, bool enable);
                                        ^~~~~~
   include/drm/drm_audio_component.h:36:31: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*get_cdclk_freq)(struct device *);
                                  ^~~~~~
   include/drm/drm_audio_component.h:43:32: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
                                   ^~~~~~
   include/drm/drm_audio_component.h:56:24: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
                           ^~~~~~
   include/drm/drm_audio_component.h:90:28: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     int (*master_bind)(struct device *dev, struct drm_audio_component *);
                               ^~~~~~
   include/drm/drm_audio_component.h:97:31: warning: 'struct device' declared inside parameter list will not be visible outside of this definition or declaration
     void (*master_unbind)(struct device *dev, struct drm_audio_component *);
                                  ^~~~~~
   In file included from drivers/gpu/drm/i915/intel_drv.h:34,
                    from drivers/gpu/drm/i915/intel_hdcp.c:15:
>> drivers/gpu/drm/i915/i915_drv.h:58:10: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
    #include <drm/i915_mei_hdcp_interface.h>
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.

vim +28 drivers/misc/mei/hdcp/mei_hdcp.c

  > 28	#include <drm/i915_mei_hdcp_interface.h>
    29	

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Re: [Intel-gfx] [PATCH v14 03/32] drm/i915: MEI interface implementation

[kbuild test robot via dri-devel]

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Hi Ramalingam,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on next-20190215]
[cannot apply to v5.0-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Ramalingam-C/drm-i915-Implement-HDCP2-2/20190216-090245
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-l1-02160931 (attached as .config)
compiler: gcc-5 (Debian 5.5.0-3) 5.4.1 20171010
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from include/drm/i915_component.h:27:0,
                    from drivers/gpu/drm/i915/intel_hdcp.c:10:
>> include/drm/drm_audio_component.h:22:27: warning: 'struct device' declared inside parameter list
     void (*get_power)(struct device *);
                              ^
>> include/drm/drm_audio_component.h:22:27: warning: its scope is only this definition or declaration, which is probably not what you want
   include/drm/drm_audio_component.h:28:27: warning: 'struct device' declared inside parameter list
     void (*put_power)(struct device *);
                              ^
   include/drm/drm_audio_component.h:32:37: warning: 'struct device' declared inside parameter list
     void (*codec_wake_override)(struct device *, bool enable);
                                        ^
   include/drm/drm_audio_component.h:36:31: warning: 'struct device' declared inside parameter list
     int (*get_cdclk_freq)(struct device *);
                                  ^
   include/drm/drm_audio_component.h:43:32: warning: 'struct device' declared inside parameter list
     int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
                                   ^
   include/drm/drm_audio_component.h:57:10: warning: 'struct device' declared inside parameter list
             unsigned char *buf, int max_bytes);
             ^
   include/drm/drm_audio_component.h:90:48: warning: 'struct device' declared inside parameter list
     int (*master_bind)(struct device *dev, struct drm_audio_component *);
                                                   ^
   include/drm/drm_audio_component.h:97:51: warning: 'struct device' declared inside parameter list
     void (*master_unbind)(struct device *dev, struct drm_audio_component *);
                                                      ^
   In file included from drivers/gpu/drm/i915/intel_drv.h:34:0,
                    from drivers/gpu/drm/i915/intel_hdcp.c:15:
   drivers/gpu/drm/i915/i915_drv.h:58:41: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
   compilation terminated.
--
   In file included from include/drm/i915_component.h:27:0,
                    from drivers/gpu//drm/i915/intel_hdcp.c:10:
>> include/drm/drm_audio_component.h:22:27: warning: 'struct device' declared inside parameter list
     void (*get_power)(struct device *);
                              ^
>> include/drm/drm_audio_component.h:22:27: warning: its scope is only this definition or declaration, which is probably not what you want
   include/drm/drm_audio_component.h:28:27: warning: 'struct device' declared inside parameter list
     void (*put_power)(struct device *);
                              ^
   include/drm/drm_audio_component.h:32:37: warning: 'struct device' declared inside parameter list
     void (*codec_wake_override)(struct device *, bool enable);
                                        ^
   include/drm/drm_audio_component.h:36:31: warning: 'struct device' declared inside parameter list
     int (*get_cdclk_freq)(struct device *);
                                  ^
   include/drm/drm_audio_component.h:43:32: warning: 'struct device' declared inside parameter list
     int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
                                   ^
   include/drm/drm_audio_component.h:57:10: warning: 'struct device' declared inside parameter list
             unsigned char *buf, int max_bytes);
             ^
   include/drm/drm_audio_component.h:90:48: warning: 'struct device' declared inside parameter list
     int (*master_bind)(struct device *dev, struct drm_audio_component *);
                                                   ^
   include/drm/drm_audio_component.h:97:51: warning: 'struct device' declared inside parameter list
     void (*master_unbind)(struct device *dev, struct drm_audio_component *);
                                                      ^
   In file included from drivers/gpu//drm/i915/intel_drv.h:34:0,
                    from drivers/gpu//drm/i915/intel_hdcp.c:15:
   drivers/gpu//drm/i915/i915_drv.h:58:41: fatal error: drm/i915_mei_hdcp_interface.h: No such file or directory
   compilation terminated.

vim +22 include/drm/drm_audio_component.h

a57942bf Takashi Iwai 2018-07-11   8  
ae891abe Takashi Iwai 2018-07-11   9  /**
ae891abe Takashi Iwai 2018-07-11  10   * struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver
ae891abe Takashi Iwai 2018-07-11  11   */
ae891abe Takashi Iwai 2018-07-11  12  struct drm_audio_component_ops {
ae891abe Takashi Iwai 2018-07-11  13  	/**
ae891abe Takashi Iwai 2018-07-11  14  	 * @owner: drm module to pin down
ae891abe Takashi Iwai 2018-07-11  15  	 */
ae891abe Takashi Iwai 2018-07-11  16  	struct module *owner;
ae891abe Takashi Iwai 2018-07-11  17  	/**
ae891abe Takashi Iwai 2018-07-11  18  	 * @get_power: get the POWER_DOMAIN_AUDIO power well
ae891abe Takashi Iwai 2018-07-11  19  	 *
ae891abe Takashi Iwai 2018-07-11  20  	 * Request the power well to be turned on.
ae891abe Takashi Iwai 2018-07-11  21  	 */
ae891abe Takashi Iwai 2018-07-11 @22  	void (*get_power)(struct device *);
ae891abe Takashi Iwai 2018-07-11  23  	/**
ae891abe Takashi Iwai 2018-07-11  24  	 * @put_power: put the POWER_DOMAIN_AUDIO power well
ae891abe Takashi Iwai 2018-07-11  25  	 *
ae891abe Takashi Iwai 2018-07-11  26  	 * Allow the power well to be turned off.
ae891abe Takashi Iwai 2018-07-11  27  	 */
ae891abe Takashi Iwai 2018-07-11  28  	void (*put_power)(struct device *);
ae891abe Takashi Iwai 2018-07-11  29  	/**
ae891abe Takashi Iwai 2018-07-11  30  	 * @codec_wake_override: Enable/disable codec wake signal
ae891abe Takashi Iwai 2018-07-11  31  	 */
ae891abe Takashi Iwai 2018-07-11  32  	void (*codec_wake_override)(struct device *, bool enable);
ae891abe Takashi Iwai 2018-07-11  33  	/**
ae891abe Takashi Iwai 2018-07-11  34  	 * @get_cdclk_freq: Get the Core Display Clock in kHz
ae891abe Takashi Iwai 2018-07-11  35  	 */
ae891abe Takashi Iwai 2018-07-11  36  	int (*get_cdclk_freq)(struct device *);
ae891abe Takashi Iwai 2018-07-11  37  	/**
ae891abe Takashi Iwai 2018-07-11  38  	 * @sync_audio_rate: set n/cts based on the sample rate
ae891abe Takashi Iwai 2018-07-11  39  	 *
ae891abe Takashi Iwai 2018-07-11  40  	 * Called from audio driver. After audio driver sets the
ae891abe Takashi Iwai 2018-07-11  41  	 * sample rate, it will call this function to set n/cts
ae891abe Takashi Iwai 2018-07-11  42  	 */
ae891abe Takashi Iwai 2018-07-11  43  	int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
ae891abe Takashi Iwai 2018-07-11  44  	/**
ae891abe Takashi Iwai 2018-07-11  45  	 * @get_eld: fill the audio state and ELD bytes for the given port
ae891abe Takashi Iwai 2018-07-11  46  	 *
ae891abe Takashi Iwai 2018-07-11  47  	 * Called from audio driver to get the HDMI/DP audio state of the given
ae891abe Takashi Iwai 2018-07-11  48  	 * digital port, and also fetch ELD bytes to the given pointer.
ae891abe Takashi Iwai 2018-07-11  49  	 *
ae891abe Takashi Iwai 2018-07-11  50  	 * It returns the byte size of the original ELD (not the actually
ae891abe Takashi Iwai 2018-07-11  51  	 * copied size), zero for an invalid ELD, or a negative error code.
ae891abe Takashi Iwai 2018-07-11  52  	 *
ae891abe Takashi Iwai 2018-07-11  53  	 * Note that the returned size may be over @max_bytes.  Then it
ae891abe Takashi Iwai 2018-07-11  54  	 * implies that only a part of ELD has been copied to the buffer.
ae891abe Takashi Iwai 2018-07-11  55  	 */
ae891abe Takashi Iwai 2018-07-11  56  	int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
ae891abe Takashi Iwai 2018-07-11  57  		       unsigned char *buf, int max_bytes);
ae891abe Takashi Iwai 2018-07-11  58  };
ae891abe Takashi Iwai 2018-07-11  59  

:::::: The code at line 22 was first introduced by commit
:::::: ae891abe7c2ccf75b69ca8330225e37ecc06924e drm/i915: Split audio component to a generic type

:::::: TO: Takashi Iwai <tiwai@suse.de>
:::::: CC: Takashi Iwai <tiwai@suse.de>

---
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[PATCH v14] drm/audio: declaration of struct device

[Ramalingam C]

Header has used the references to struct device without it definition
or declaration.

Hence the warning of "struct device declared inside parameter list..."
This changes adds a declaration to struct device in the header to avoid
any such warnings.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 include/drm/drm_audio_component.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/drm/drm_audio_component.h b/include/drm/drm_audio_component.h
index d0c7444319f5..a45f93487039 100644
--- a/include/drm/drm_audio_component.h
+++ b/include/drm/drm_audio_component.h
@@ -5,6 +5,7 @@
 #define _DRM_AUDIO_COMPONENT_H_
 
 struct drm_audio_component;
+struct device;
 
 /**
  * struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver
-- 
2.7.4

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