[PATCH v11 00/42] drm/i915: Implement HDCP2.2

[PATCH v11 00/42] 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.

Major changes in v11:
  - hdcp cleanup for component_del
  - hdcp_disable on comp_unbind
  - cp_irq detection based on atomic_inc.
  - as fastset is enabled, patch for avoiding the modeset is dropped.
  - component documentation is added.
  - hdcp2_capability check is moved into intel_hdcp.c
  - Addressed Few minor review comments from Tomas

To ease the review process, series is hosted at
https://github.com/ramalingampc2008/drm-tip.git hdcp2_2_v11

Daniel Vetter (4):
  component: Add documentation
  components: multiple components for a device
  drm/doc: document recommended component helper usage
  i915/snd_hdac: I915 subcomponent for the snd_hdac

Ramalingam C (35):
  drm/i915: Gathering the HDCP1.4 routines together
  drm: header for i915 - MEI_HDCP interface
  drm/i915: Initialize HDCP2.2
  drm/i915: MEI interface definition
  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: helper functions for hdcp2 seq_num to from u32
  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: HDCP state handling in ddi_update_pipe
  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
  FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4
  FOR_TESTING_ONLY: ICL: Limit clk to <= 340MHz

Tomas Winkler (3):
  mei: bus: whitelist hdcp client
  mei: me: add ice lake point device ids
  mei: bus: export to_mei_cl_device for mei client device drivers

 Documentation/driver-api/component.rst   |   19 +
 Documentation/driver-api/device_link.rst |    3 +
 Documentation/driver-api/index.rst       |    1 +
 Documentation/gpu/drm-internals.rst      |    5 +
 drivers/base/component.c                 |  207 ++++-
 drivers/gpu/drm/drm_drv.c                |   14 +
 drivers/gpu/drm/i915/i915_debugfs.c      |   10 +-
 drivers/gpu/drm/i915/i915_drv.c          |    1 +
 drivers/gpu/drm/i915/i915_drv.h          |    7 +
 drivers/gpu/drm/i915/intel_audio.c       |    4 +-
 drivers/gpu/drm/i915/intel_connector.c   |    2 +
 drivers/gpu/drm/i915/intel_ddi.c         |    7 +
 drivers/gpu/drm/i915/intel_dp.c          |  350 ++++++++-
 drivers/gpu/drm/i915/intel_drv.h         |   81 +-
 drivers/gpu/drm/i915/intel_hdcp.c        | 1267 +++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/intel_hdmi.c        |  240 +++++-
 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         |  844 ++++++++++++++++++++
 drivers/misc/mei/hdcp/mei_hdcp.h         |  389 +++++++++
 drivers/misc/mei/hw-me-regs.h            |    4 +
 drivers/misc/mei/pci-me.c                |    4 +
 include/drm/drm_hdcp.h                   |   25 +-
 include/drm/i915_component.h             |    7 +
 include/drm/i915_mei_hdcp_interface.h    |  148 ++++
 include/linux/component.h                |   75 ++
 include/linux/mei_cl_bus.h               |    2 +
 include/sound/hda_component.h            |    5 +-
 sound/hda/hdac_component.c               |    4 +-
 sound/hda/hdac_i915.c                    |    6 +-
 33 files changed, 3620 insertions(+), 145 deletions(-)
 create mode 100644 Documentation/driver-api/component.rst
 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
 create mode 100644 include/drm/i915_mei_hdcp_interface.h

-- 
2.7.4

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[PATCH v11 01/42] component: Add documentation

[Ramalingam C]

From: Daniel Vetter <daniel.vetter@intel.com>

While typing these I think doing an s/component_master/aggregate/
would be useful:
- it's shorter :-)
- I think component/aggregate is much more meaningful naming than
  component/puppetmaster or something like that. At least to my
  English ear "aggregate" emphasizes much more the "assemble a pile of
  things into something bigger" aspect, and there's not really much
  of a control hierarchy between aggregate and constituing components.

But that's way more than a quick doc typing exercise ...

Thanks to Ram for commenting on an initial draft of these docs.

v2: Review from Rafael:
- git add Documenation/driver-api/component.rst
- lots of polish to the wording + spelling fixes.

v3: Review from Russell:
- s/framework/helper
- clarify the documentation for component_match_add functions.

Cc: "C, Ramalingam" <ramalingam.c@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 Documentation/driver-api/component.rst   |  17 +++++
 Documentation/driver-api/device_link.rst |   3 +
 Documentation/driver-api/index.rst       |   1 +
 drivers/base/component.c                 | 107 ++++++++++++++++++++++++++++++-
 include/linux/component.h                |  70 ++++++++++++++++++++
 5 files changed, 195 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/driver-api/component.rst

diff --git a/Documentation/driver-api/component.rst b/Documentation/driver-api/component.rst
new file mode 100644
index 000000000000..2da4a8f20607
--- /dev/null
+++ b/Documentation/driver-api/component.rst
@@ -0,0 +1,17 @@
+======================================
+Component Helper for Aggregate Drivers
+======================================
+
+.. kernel-doc:: drivers/base/component.c
+   :doc: overview
+
+
+API
+===
+
+.. kernel-doc:: include/linux/component.h
+   :internal:
+
+.. kernel-doc:: drivers/base/component.c
+   :export:
+
diff --git a/Documentation/driver-api/device_link.rst b/Documentation/driver-api/device_link.rst
index d6763272e747..2d5919b2b337 100644
--- a/Documentation/driver-api/device_link.rst
+++ b/Documentation/driver-api/device_link.rst
@@ -1,6 +1,9 @@
 .. |struct dev_pm_domain| replace:: :c:type:`struct dev_pm_domain <dev_pm_domain>`
 .. |struct generic_pm_domain| replace:: :c:type:`struct generic_pm_domain <generic_pm_domain>`
 
+
+.. _device_link:
+
 ============
 Device links
 ============
diff --git a/Documentation/driver-api/index.rst b/Documentation/driver-api/index.rst
index ab38ced66a44..c0b600ed9961 100644
--- a/Documentation/driver-api/index.rst
+++ b/Documentation/driver-api/index.rst
@@ -22,6 +22,7 @@ available subsections can be seen below.
    device_connection
    dma-buf
    device_link
+   component
    message-based
    sound
    frame-buffer
diff --git a/drivers/base/component.c b/drivers/base/component.c
index ddcea8739c12..e1993190bea9 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -16,6 +16,32 @@
 #include <linux/slab.h>
 #include <linux/debugfs.h>
 
+/**
+ * DOC: overview
+ *
+ * The component helper allows drivers to collect a pile of sub-devices,
+ * including their bound drivers, into an aggregate driver. Various subsystems
+ * already provide functions to get hold of such components, e.g.
+ * of_clk_get_by_name(). The component helper can be used when such a
+ * subsystem-specific way to find a device is not available: The component
+ * helper fills the niche of aggregate drivers for specific hardware, where
+ * further standardization into a subsystem would not be practical. The common
+ * example is when a logical device (e.g. a DRM display driver) is spread around
+ * the SoC on various component (scanout engines, blending blocks, transcoders
+ * for various outputs and so on).
+ *
+ * The component helper also doesn't solve runtime dependencies, e.g. for system
+ * suspend and resume operations. See also :ref:`device links<device_link>`.
+ *
+ * Components are registered using component_add() and unregistered with
+ * component_del(), usually from the driver's probe and disconnect functions.
+ *
+ * Aggregate drivers first assemble a component match list of what they need
+ * using component_match_add(). This is then registered as an aggregate driver
+ * using component_master_add_with_match(), and unregistered using
+ * component_master_del().
+ */
+
 struct component;
 
 struct component_match_array {
@@ -301,10 +327,25 @@ static int component_match_realloc(struct device *dev,
 	return 0;
 }
 
-/*
- * Add a component to be matched, with a release function.
+/**
+ * component_match_add_release - add a component match with release callback
+ * @master: device with the aggregate driver
+ * @matchptr: pointer to the list of component matches
+ * @release: release function for @compare_data
+ * @compare: compare function to match against all components
+ * @compare_data: opaque pointer passed to the @compare function
+ *
+ * This adds a new component match to the list stored in @matchptr, which the
+ * @master aggregate driver needs to function. The list of component matches
+ * pointed to by @matchptr must be initialized to NULL before adding the first
+ * match.
+ *
+ * The allocated match list in @matchptr is automatically released using devm
+ * actions, where upon @release will be called to free any references held by
+ * @compare_data, e.g. when @compare_data is a &device_node that must be
+ * released with of_node_put().
  *
- * The match array is first created or extended if necessary.
+ * See also component_match_add().
  */
 void component_match_add_release(struct device *master,
 	struct component_match **matchptr,
@@ -367,6 +408,18 @@ static void free_master(struct master *master)
 	kfree(master);
 }
 
+/**
+ * component_master_add_with_match - register an aggregate driver
+ * @dev: device with the aggregate driver
+ * @ops: callbacks for the aggregate driver
+ * @match: component match list for the aggregate driver
+ *
+ * Registers a new aggregate driver consisting of the components added to @match
+ * by calling one of the component_match_add() functions. Once all components in
+ * @match are available, it will be assembled by calling
+ * &component_master_ops.bind from @ops. Must be unregistered by calling
+ * component_master_del().
+ */
 int component_master_add_with_match(struct device *dev,
 	const struct component_master_ops *ops,
 	struct component_match *match)
@@ -403,6 +456,15 @@ int component_master_add_with_match(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(component_master_add_with_match);
 
+/**
+ * component_master_del - unregister an aggregate driver
+ * @dev: device with the aggregate driver
+ * @ops: callbacks for the aggregate driver
+ *
+ * Unregisters an aggregate driver registered with
+ * component_master_add_with_match(). If necessary the aggregate driver is first
+ * disassembled by calling &component_master_ops.unbind from @ops.
+ */
 void component_master_del(struct device *dev,
 	const struct component_master_ops *ops)
 {
@@ -430,6 +492,15 @@ static void component_unbind(struct component *component,
 	devres_release_group(component->dev, component);
 }
 
+/**
+ * component_unbind_all - unbind all component to an aggregate driver
+ * @master_dev: device with the aggregate driver
+ * @data: opaque pointer, passed to all components
+ *
+ * Unbinds all components to the aggregate @dev by passing @data to their
+ * &component_ops.unbind functions. Should be called from
+ * &component_master_ops.unbind.
+ */
 void component_unbind_all(struct device *master_dev, void *data)
 {
 	struct master *master;
@@ -503,6 +574,15 @@ static int component_bind(struct component *component, struct master *master,
 	return ret;
 }
 
+/**
+ * component_bind_all - bind all component to an aggregate driver
+ * @master_dev: device with the aggregate driver
+ * @data: opaque pointer, passed to all components
+ *
+ * Binds all components to the aggregate @dev by passing @data to their
+ * &component_ops.bind functions. Should be called from
+ * &component_master_ops.bind.
+ */
 int component_bind_all(struct device *master_dev, void *data)
 {
 	struct master *master;
@@ -537,6 +617,18 @@ int component_bind_all(struct device *master_dev, void *data)
 }
 EXPORT_SYMBOL_GPL(component_bind_all);
 
+/**
+ * component_add - register a component
+ * @dev: component device
+ * @ops: component callbacks
+ *
+ * Register a new component for @dev. Functions in @ops will be called when the
+ * aggregate driver is ready to bind the overall driver by calling
+ * component_bind_all(). See also &struct component_ops.
+ *
+ * The component needs to be unregistered at driver unload/disconnect by calling
+ * component_del().
+ */
 int component_add(struct device *dev, const struct component_ops *ops)
 {
 	struct component *component;
@@ -568,6 +660,15 @@ int component_add(struct device *dev, const struct component_ops *ops)
 }
 EXPORT_SYMBOL_GPL(component_add);
 
+/**
+ * component_del - unregister a component
+ * @dev: component device
+ * @ops: component callbacks
+ *
+ * Unregister a component added with component_add(). If the component is bound
+ * into an aggregate driver, this will force the entire aggregate driver,
+ * including all its components, to be unbound.
+ */
 void component_del(struct device *dev, const struct component_ops *ops)
 {
 	struct component *c, *component = NULL;
diff --git a/include/linux/component.h b/include/linux/component.h
index e71fbbbc74e2..15c2538d8648 100644
--- a/include/linux/component.h
+++ b/include/linux/component.h
@@ -6,9 +6,28 @@
 
 struct device;
 
+/**
+ * struct component_ops - callbacks for component drivers
+ *
+ * Components are registered with component_add() and unregistered with
+ * component_del().
+ */
 struct component_ops {
+	/**
+	 * @bind:
+	 *
+	 * Called through component_bind_all() when the aggregate driver is
+	 * ready to bind the overall driver.
+	 */
 	int (*bind)(struct device *comp, struct device *master,
 		    void *master_data);
+	/**
+	 * @unbind:
+	 *
+	 * Called through component_unbind_all() when the aggregate driver is
+	 * ready to bind the overall driver, or when component_bind_all() fails
+	 * part-ways through and needs to unbind some already bound components.
+	 */
 	void (*unbind)(struct device *comp, struct device *master,
 		       void *master_data);
 };
@@ -21,8 +40,42 @@ void component_unbind_all(struct device *master, void *master_data);
 
 struct master;
 
+/**
+ * struct component_master_ops - callback for the aggregate driver
+ *
+ * Aggregate drivers are registered with component_master_add_with_match() and
+ * unregistered with component_master_del().
+ */
 struct component_master_ops {
+	/**
+	 * @bind:
+	 *
+	 * Called when all components or the aggregate driver, as specified in
+	 * the match list passed to component_master_add_with_match(), are
+	 * ready. Usually there are 3 steps to bind an aggregate driver:
+	 *
+	 * 1. Allocate a structure for the aggregate driver.
+	 *
+	 * 2. Bind all components to the aggregate driver by calling
+	 *    component_bind_all() with the aggregate driver structure as opaque
+	 *    pointer data.
+	 *
+	 * 3. Register the aggregate driver with the subsystem to publish its
+	 *    interfaces.
+	 *
+	 * Note that the lifetime of the aggregate driver does not align with
+	 * any of the underlying &struct device instances. Therefore devm cannot
+	 * be used and all resources acquired or allocated in this callback must
+	 * be explicitly released in the @unbind callback.
+	 */
 	int (*bind)(struct device *master);
+	/**
+	 * @unbind:
+	 *
+	 * Called when either the aggregate driver, using
+	 * component_master_del(), or one of its components, using
+	 * component_del(), is unregistered.
+	 */
 	void (*unbind)(struct device *master);
 };
 
@@ -38,6 +91,23 @@ void component_match_add_release(struct device *master,
 	void (*release)(struct device *, void *),
 	int (*compare)(struct device *, void *), void *compare_data);
 
+/**
+ * component_match_add - add a compent match
+ * @master: device with the aggregate driver
+ * @matchptr: pointer to the list of component matches
+ * @compare: compare function to match against all components
+ * @compare_data: opaque pointer passed to the @compare function
+ *
+ * This adds a new component match to the list stored in @matchptr, which the
+ * @master aggregate driver needs to function. The list of component matches
+ * pointed to by @matchptr must be initialized to NULL before adding the first
+ * match.
+ *
+ * The allocated match list in @matchptr is automatically released using devm
+ * actions.
+ *
+ * See also component_match_add_release().
+ */
 static inline void component_match_add(struct device *master,
 	struct component_match **matchptr,
 	int (*compare)(struct device *, void *), void *compare_data)
-- 
2.7.4

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[PATCH v11 02/42] components: multiple components for a device

[Ramalingam C]

From: Daniel Vetter <daniel.vetter@ffwll.ch>

Component framework is extended to support multiple components for
a struct device. These will be matched with different masters based on
its sub component value.

We are introducing this, as I915 needs two different components
with different subcomponent value, which will be matched to two
different component masters(Audio and HDCP) based on the subcomponent
values.

v2: Add documenation.

v3: Rebase on top of updated documenation.
    Fixed a typo in registered.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v1 code)
Signed-off-by: Ramalingam C <ramalingam.c@intel.com> (v1 commit message)
Cc: Ramalingam C <ramalingam.c@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
---
 drivers/base/component.c  | 160 +++++++++++++++++++++++++++++++++++-----------
 include/linux/component.h |   9 ++-
 2 files changed, 129 insertions(+), 40 deletions(-)

diff --git a/drivers/base/component.c b/drivers/base/component.c
index e1993190bea9..e8e24940963e 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -47,6 +47,7 @@ struct component;
 struct component_match_array {
 	void *data;
 	int (*compare)(struct device *, void *);
+	int (*compare_typed)(struct device *, int, void *);
 	void (*release)(struct device *, void *);
 	struct component *component;
 	bool duplicate;
@@ -74,6 +75,7 @@ struct component {
 	bool bound;
 
 	const struct component_ops *ops;
+	int subcomponent;
 	struct device *dev;
 };
 
@@ -158,7 +160,7 @@ static struct master *__master_find(struct device *dev,
 }
 
 static struct component *find_component(struct master *master,
-	int (*compare)(struct device *, void *), void *compare_data)
+	struct component_match_array *mc)
 {
 	struct component *c;
 
@@ -166,8 +168,13 @@ static struct component *find_component(struct master *master,
 		if (c->master && c->master != master)
 			continue;
 
-		if (compare(c->dev, compare_data))
+		if (mc->compare_typed) {
+			if (mc->compare_typed(c->dev, c->subcomponent,
+					      mc->data))
+				return c;
+		} else if (mc->compare(c->dev, mc->data)) {
 			return c;
+		}
 	}
 
 	return NULL;
@@ -192,7 +199,7 @@ static int find_components(struct master *master)
 		if (match->compare[i].component)
 			continue;
 
-		c = find_component(master, mc->compare, mc->data);
+		c = find_component(master, mc);
 		if (!c) {
 			ret = -ENXIO;
 			break;
@@ -327,30 +334,12 @@ static int component_match_realloc(struct device *dev,
 	return 0;
 }
 
-/**
- * component_match_add_release - add a component match with release callback
- * @master: device with the aggregate driver
- * @matchptr: pointer to the list of component matches
- * @release: release function for @compare_data
- * @compare: compare function to match against all components
- * @compare_data: opaque pointer passed to the @compare function
- *
- * This adds a new component match to the list stored in @matchptr, which the
- * @master aggregate driver needs to function. The list of component matches
- * pointed to by @matchptr must be initialized to NULL before adding the first
- * match.
- *
- * The allocated match list in @matchptr is automatically released using devm
- * actions, where upon @release will be called to free any references held by
- * @compare_data, e.g. when @compare_data is a &device_node that must be
- * released with of_node_put().
- *
- * See also component_match_add().
- */
-void component_match_add_release(struct device *master,
+static void __component_match_add(struct device *master,
 	struct component_match **matchptr,
 	void (*release)(struct device *, void *),
-	int (*compare)(struct device *, void *), void *compare_data)
+	int (*compare)(struct device *, void *),
+	int (*compare_typed)(struct device *, int, void *),
+	void *compare_data)
 {
 	struct component_match *match = *matchptr;
 
@@ -382,13 +371,69 @@ void component_match_add_release(struct device *master,
 	}
 
 	match->compare[match->num].compare = compare;
+	match->compare[match->num].compare_typed = compare_typed;
 	match->compare[match->num].release = release;
 	match->compare[match->num].data = compare_data;
 	match->compare[match->num].component = NULL;
 	match->num++;
 }
+
+/**
+ * component_match_add_release - add a component match with release callback
+ * @master: device with the aggregate driver
+ * @matchptr: pointer to the list of component matches
+ * @release: release function for @compare_data
+ * @compare: compare function to match against all components
+ * @compare_data: opaque pointer passed to the @compare function
+ *
+ * This adds a new component match to the list stored in @matchptr, which the
+ * @master aggregate driver needs to function. The list of component matches
+ * pointed to by @matchptr must be initialized to NULL before adding the first
+ * match. This only matches against components added with component_add().
+ *
+ * The allocated match list in @matchptr is automatically released using devm
+ * actions, where upon @release will be called to free any references held by
+ * @compare_data, e.g. when @compare_data is a &device_node that must be
+ * released with of_node_put().
+ *
+ * See also component_match_add() and component_match_add_typed().
+ */
+void component_match_add_release(struct device *master,
+	struct component_match **matchptr,
+	void (*release)(struct device *, void *),
+	int (*compare)(struct device *, void *), void *compare_data)
+{
+	__component_match_add(master, matchptr, release, compare, NULL,
+			      compare_data);
+}
 EXPORT_SYMBOL(component_match_add_release);
 
+/**
+ * component_match_add_typed - add a compent match for a typed component
+ * @master: device with the aggregate driver
+ * @matchptr: pointer to the list of component matches
+ * @compare_typed: compare function to match against all typed components
+ * @compare_data: opaque pointer passed to the @compare function
+ *
+ * This adds a new component match to the list stored in @matchptr, which the
+ * @master aggregate driver needs to function. The list of component matches
+ * pointed to by @matchptr must be initialized to NULL before adding the first
+ * match. This only matches against components added with component_add_typed().
+ *
+ * The allocated match list in @matchptr is automatically released using devm
+ * actions.
+ *
+ * See also component_match_add_release() and component_match_add_typed().
+ */
+void component_match_add_typed(struct device *master,
+	struct component_match **matchptr,
+	int (*compare_typed)(struct device *, int, void *), void *compare_data)
+{
+	__component_match_add(master, matchptr, NULL, NULL, compare_typed,
+			      compare_data);
+}
+EXPORT_SYMBOL(component_match_add_typed);
+
 static void free_master(struct master *master)
 {
 	struct component_match *match = master->match;
@@ -617,19 +662,8 @@ int component_bind_all(struct device *master_dev, void *data)
 }
 EXPORT_SYMBOL_GPL(component_bind_all);
 
-/**
- * component_add - register a component
- * @dev: component device
- * @ops: component callbacks
- *
- * Register a new component for @dev. Functions in @ops will be called when the
- * aggregate driver is ready to bind the overall driver by calling
- * component_bind_all(). See also &struct component_ops.
- *
- * The component needs to be unregistered at driver unload/disconnect by calling
- * component_del().
- */
-int component_add(struct device *dev, const struct component_ops *ops)
+static int __component_add(struct device *dev, const struct component_ops *ops,
+	int subcomponent)
 {
 	struct component *component;
 	int ret;
@@ -640,6 +674,7 @@ int component_add(struct device *dev, const struct component_ops *ops)
 
 	component->ops = ops;
 	component->dev = dev;
+	component->subcomponent = subcomponent;
 
 	dev_dbg(dev, "adding component (ops %ps)\n", ops);
 
@@ -658,6 +693,55 @@ int component_add(struct device *dev, const struct component_ops *ops)
 
 	return ret < 0 ? ret : 0;
 }
+
+/**
+ * component_add_typed - register a component
+ * @dev: component device
+ * @ops: component callbacks
+ * @subcomponent: nonzero identifier for subcomponents
+ *
+ * Register a new component for @dev. Functions in @ops will be call when the
+ * aggregate driver is ready to bind the overall driver by calling
+ * component_bind_all(). See also &struct component_ops.
+ *
+ * @subcomponent must be nonzero and is used to differentiate between multiple
+ * components registered on the same device @dev. These components are match
+ * using component_match_add_typed().
+ *
+ * The component needs to be unregistered at driver unload/disconnect by
+ * calling component_del().
+ *
+ * See also component_add().
+ */
+int component_add_typed(struct device *dev, const struct component_ops *ops,
+	int subcomponent)
+{
+	if (WARN_ON(subcomponent == 0))
+		return -EINVAL;
+
+	return __component_add(dev, ops, subcomponent);
+}
+EXPORT_SYMBOL_GPL(component_add_typed);
+
+/**
+ * component_add - register a component
+ * @dev: component device
+ * @ops: component callbacks
+ *
+ * Register a new component for @dev. Functions in @ops will be called when the
+ * aggregate driver is ready to bind the overall driver by calling
+ * component_bind_all(). See also &struct component_ops.
+ *
+ * The component needs to be unregistered at driver unload/disconnect by
+ * calling component_del().
+ *
+ * See also component_add_typed() for a variant that allows multipled different
+ * components on the same device.
+ */
+int component_add(struct device *dev, const struct component_ops *ops)
+{
+	return __component_add(dev, ops, 0);
+}
 EXPORT_SYMBOL_GPL(component_add);
 
 /**
diff --git a/include/linux/component.h b/include/linux/component.h
index 15c2538d8648..97a16d48f9c9 100644
--- a/include/linux/component.h
+++ b/include/linux/component.h
@@ -33,6 +33,8 @@ struct component_ops {
 };
 
 int component_add(struct device *, const struct component_ops *);
+int component_add_typed(struct device *dev, const struct component_ops *ops,
+	int subcomponent);
 void component_del(struct device *, const struct component_ops *);
 
 int component_bind_all(struct device *master, void *master_data);
@@ -90,6 +92,9 @@ void component_match_add_release(struct device *master,
 	struct component_match **matchptr,
 	void (*release)(struct device *, void *),
 	int (*compare)(struct device *, void *), void *compare_data);
+void component_match_add_typed(struct device *master,
+	struct component_match **matchptr,
+	int (*compare_typed)(struct device *, int, void *), void *compare_data);
 
 /**
  * component_match_add - add a compent match
@@ -101,12 +106,12 @@ void component_match_add_release(struct device *master,
  * This adds a new component match to the list stored in @matchptr, which the
  * @master aggregate driver needs to function. The list of component matches
  * pointed to by @matchptr must be initialized to NULL before adding the first
- * match.
+ * match. This only matches against components added with component_add().
  *
  * The allocated match list in @matchptr is automatically released using devm
  * actions.
  *
- * See also component_match_add_release().
+ * See also component_match_add_release() and component_match_add_typed().
  */
 static inline void component_match_add(struct device *master,
 	struct component_match **matchptr,
-- 
2.7.4

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[PATCH v11 03/42] drm/doc: document recommended component helper usage

[Ramalingam C]

From: Daniel Vetter <daniel.vetter@intel.com>

Now that component has docs it's worth spending a few words and
hyperlinks on recommended best practices in drm.

Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 Documentation/driver-api/component.rst |  2 ++
 Documentation/gpu/drm-internals.rst    |  5 +++++
 drivers/gpu/drm/drm_drv.c              | 14 ++++++++++++++
 3 files changed, 21 insertions(+)

diff --git a/Documentation/driver-api/component.rst b/Documentation/driver-api/component.rst
index 2da4a8f20607..57e37590733f 100644
--- a/Documentation/driver-api/component.rst
+++ b/Documentation/driver-api/component.rst
@@ -1,3 +1,5 @@
+.. _component:
+
 ======================================
 Component Helper for Aggregate Drivers
 ======================================
diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst
index 3ae23a5454ac..966bd2d9f0cc 100644
--- a/Documentation/gpu/drm-internals.rst
+++ b/Documentation/gpu/drm-internals.rst
@@ -93,6 +93,11 @@ Device Instance and Driver Handling
 Driver Load
 -----------
 
+Component Helper Usage
+~~~~~~~~~~~~~~~~~~~~~~
+
+.. kernel-doc:: drivers/gpu/drm/drm_drv.c
+   :doc: component helper usage recommendations
 
 IRQ Helper Library
 ~~~~~~~~~~~~~~~~~~
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 381581b01d48..aae413003705 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -457,6 +457,20 @@ static void drm_fs_inode_free(struct inode *inode)
 }
 
 /**
+ * DOC: component helper usage recommendations
+ *
+ * DRM drivers that drive hardware where a logical device consists of a pile of
+ * independent hardware blocks are recommended to use the :ref:`component helper
+ * library<component>`. The entire device initialization procedure should be run
+ * from the &component_master_ops.master_bind callback, starting with
+ * drm_dev_init(), then binding all components with component_bind_all() and
+ * finishing with drm_dev_register(). For consistency and easier sharing of
+ * components across drivers the opaque pointer passed to all components through
+ * component_bind_all() should point at &struct drm_device of the device
+ * instance, not some driver specific private structure.
+ */
+
+/**
  * drm_dev_init - Initialise new DRM device
  * @dev: DRM device
  * @driver: DRM driver
-- 
2.7.4

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[PATCH v11 04/42] i915/snd_hdac: I915 subcomponent for the snd_hdac

[Ramalingam C]

From: Daniel Vetter <daniel.vetter@ffwll.ch>

Since we need multiple components for I915 for different purposes
(Audio & Mei_hdcp), we adopt the subcomponents methodology introduced
by the previous patch (mentioned below).

	Author: Daniel Vetter <daniel.vetter@ffwll.ch>
	Date:   Mon Jan 28 17:08:20 2019 +0530

	    components: multiple components for a device

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cc: Russell King <rmk+kernel@arm.linux.org.uk>
cc: Rafael J. Wysocki <rafael@kernel.org>
cc: Jaroslav Kysela <perex@perex.cz>
cc: Takashi Iwai <tiwai@suse.com>
cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Ramalingam C <ramalinagm.c@intel.com>
---
 drivers/gpu/drm/i915/intel_audio.c | 4 +++-
 include/drm/i915_component.h       | 4 ++++
 include/sound/hda_component.h      | 5 +++--
 sound/hda/hdac_component.c         | 4 ++--
 sound/hda/hdac_i915.c              | 6 ++++--
 5 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index de26cd0a5497..5104c6bbd66f 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -984,7 +984,9 @@ void i915_audio_component_init(struct drm_i915_private *dev_priv)
 {
 	int ret;
 
-	ret = component_add(dev_priv->drm.dev, &i915_audio_component_bind_ops);
+	ret = component_add_typed(dev_priv->drm.dev,
+				  &i915_audio_component_bind_ops,
+				  I915_COMPONENT_AUDIO);
 	if (ret < 0) {
 		DRM_ERROR("failed to add audio component (%d)\n", ret);
 		/* continue with reduced functionality */
diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
index fca22d463e1b..72fbb037f9b3 100644
--- a/include/drm/i915_component.h
+++ b/include/drm/i915_component.h
@@ -26,6 +26,10 @@
 
 #include "drm_audio_component.h"
 
+enum i915_component_type {
+	I915_COMPONENT_AUDIO = 1,
+};
+
 /* MAX_PORT is the number of port
  * It must be sync with I915_MAX_PORTS defined i915_drv.h
  */
diff --git a/include/sound/hda_component.h b/include/sound/hda_component.h
index 2ec31b358950..d4804c72d959 100644
--- a/include/sound/hda_component.h
+++ b/include/sound/hda_component.h
@@ -20,7 +20,7 @@ int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t nid, int dev_id,
 			   bool *audio_enabled, char *buffer, int max_bytes);
 int snd_hdac_acomp_init(struct hdac_bus *bus,
 			const struct drm_audio_component_audio_ops *aops,
-			int (*match_master)(struct device *, void *),
+			int (*match_master)(struct device *, int, void *),
 			size_t extra_size);
 int snd_hdac_acomp_exit(struct hdac_bus *bus);
 int snd_hdac_acomp_register_notifier(struct hdac_bus *bus,
@@ -47,7 +47,8 @@ static inline int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t ni
 }
 static inline int snd_hdac_acomp_init(struct hdac_bus *bus,
 				      const struct drm_audio_component_audio_ops *aops,
-				      int (*match_master)(struct device *, void *),
+				      int (*match_master)(struct device *,
+							  int, void *),
 				      size_t extra_size)
 {
 	return -ENODEV;
diff --git a/sound/hda/hdac_component.c b/sound/hda/hdac_component.c
index a6d37b9d6413..5c95933e739a 100644
--- a/sound/hda/hdac_component.c
+++ b/sound/hda/hdac_component.c
@@ -269,7 +269,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_acomp_register_notifier);
  */
 int snd_hdac_acomp_init(struct hdac_bus *bus,
 			const struct drm_audio_component_audio_ops *aops,
-			int (*match_master)(struct device *, void *),
+			int (*match_master)(struct device *, int, void *),
 			size_t extra_size)
 {
 	struct component_match *match = NULL;
@@ -288,7 +288,7 @@ int snd_hdac_acomp_init(struct hdac_bus *bus,
 	bus->audio_component = acomp;
 	devres_add(dev, acomp);
 
-	component_match_add(dev, &match, match_master, bus);
+	component_match_add_typed(dev, &match, match_master, bus);
 	ret = component_master_add_with_match(dev, &hdac_component_master_ops,
 					      match);
 	if (ret < 0)
diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
index 617ff1aa818f..7aee090e3d27 100644
--- a/sound/hda/hdac_i915.c
+++ b/sound/hda/hdac_i915.c
@@ -82,9 +82,11 @@ void snd_hdac_i915_set_bclk(struct hdac_bus *bus)
 }
 EXPORT_SYMBOL_GPL(snd_hdac_i915_set_bclk);
 
-static int i915_component_master_match(struct device *dev, void *data)
+static int i915_component_master_match(struct device *dev, int subcomponent,
+				       void *data)
 {
-	return !strcmp(dev->driver->name, "i915");
+	return !strcmp(dev->driver->name, "i915") &&
+	       subcomponent == I915_COMPONENT_AUDIO;
 }
 
 /* check whether intel graphics is present */
-- 
2.7.4

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[PATCH v11 05/42] 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>
---
 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 v11 06/42] drm: header for i915 - MEI_HDCP interface

[Ramalingam C]

Header defines the interface for the I915 and MEI_HDCP drivers.
This interface is specific to the usage of mei_hdcp from gen9+
platforms for ME FW based HDCP2.2 services.

And Generic HDCP2.2 protocol specific definitions
are added at drm/drm_hdcp.h.

v2:
  Commit msg is enhanced [Daniel]
v3:
  i915_hdcp_comp_master is defined.

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/i915_mei_hdcp_interface.h | 148 ++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 include/drm/i915_mei_hdcp_interface.h

diff --git a/include/drm/i915_mei_hdcp_interface.h b/include/drm/i915_mei_hdcp_interface.h
new file mode 100644
index 000000000000..bc5b0c71ed3c
--- /dev/null
+++ b/include/drm/i915_mei_hdcp_interface.h
@@ -0,0 +1,148 @@
+/* SPDX-License-Identifier: (GPL-2.0+) */
+/*
+ * Copyright © 2017-2018 Intel Corporation
+ *
+ * Authors:
+ * Ramalingam C <ramalingam.c@intel.com>
+ */
+
+#ifndef _I915_MEI_HDCP_INTERFACE_H_
+#define _I915_MEI_HDCP_INTERFACE_H_
+
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <drm/drm_hdcp.h>
+
+/**
+ * enum hdcp_port_type - HDCP port implementation type defined by ME FW
+ * @HDCP_PORT_TYPE_INVALID: Invalid hdcp port type
+ * @HDCP_PORT_TYPE_INTEGRATED: In-Host HDCP2.x port
+ * @HDCP_PORT_TYPE_LSPCON: HDCP2.2 discrete wired Tx port with LSPCON
+ *			   (HDMI 2.0) solution
+ * @HDCP_PORT_TYPE_CPDP: HDCP2.2 discrete wired Tx port using the CPDP (DP 1.3)
+ *			 solution
+ */
+enum hdcp_port_type {
+	HDCP_PORT_TYPE_INVALID,
+	HDCP_PORT_TYPE_INTEGRATED,
+	HDCP_PORT_TYPE_LSPCON,
+	HDCP_PORT_TYPE_CPDP
+};
+
+/**
+ * enum hdcp_wired_protocol - HDCP adaptation used on the port
+ * @HDCP_PROTOCOL_INVALID: Invalid HDCP adaptation protocol
+ * @HDCP_PROTOCOL_HDMI: HDMI adaptation of HDCP used on the port
+ * @HDCP_PROTOCOL_DP: DP adaptation of HDCP used on the port
+ */
+enum hdcp_wired_protocol {
+	HDCP_PROTOCOL_INVALID,
+	HDCP_PROTOCOL_HDMI,
+	HDCP_PROTOCOL_DP
+};
+
+/**
+ * struct hdcp_port_data - intel specific HDCP port data
+ * @port: port index as per I915
+ * @port_type: HDCP port type as per ME FW classification
+ * @protocol: HDCP adaptation as per ME FW
+ * @k: No of streams transmitted on a port. Only on DP MST this is != 1
+ * @seq_num_m: 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.
+ * @streams: struct hdcp2_streamid_type[k]. Defines the type and id for the
+ *	     streams
+ */
+struct hdcp_port_data {
+	short int port;
+	u8 port_type;
+	u8 protocol;
+	u16 k;
+	u32 seq_num_m;
+	struct hdcp2_streamid_type *streams;
+};
+
+/**
+ * struct i915_hdcp_component_ops- ops for HDCP2.2 services.
+ * @owner: Module providing the ops
+ * @initiate_hdcp2_session: Initiate a Wired HDCP2.2 Tx Session.
+ *			    And Prepare AKE_Init.
+ * @verify_receiver_cert_prepare_km: Verify the Receiver Certificate
+ *				     AKE_Send_Cert and prepare
+				     AKE_Stored_Km/AKE_No_Stored_Km
+ * @verify_hprime: Verify AKE_Send_H_prime
+ * @store_pairing_info: Store pairing info received
+ * @initiate_locality_check: Prepare LC_Init
+ * @verify_lprime: Verify lprime
+ * @get_session_key: Prepare SKE_Send_Eks
+ * @repeater_check_flow_prepare_ack: Validate the Downstream topology
+ *				     and prepare rep_ack
+ * @verify_mprime: Verify mprime
+ * @enable_hdcp_authentication:  Mark a port as authenticated.
+ * @close_hdcp_session: Close the Wired HDCP Tx session per port.
+ *			This also disables the authenticated state of the port.
+ */
+struct i915_hdcp_component_ops {
+	/**
+	 * @owner: mei_hdcp module
+	 */
+	struct module *owner;
+
+	int (*initiate_hdcp2_session)(struct device *dev,
+				      struct hdcp_port_data *data,
+				      struct hdcp2_ake_init *ake_data);
+	int (*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);
+	int (*verify_hprime)(struct device *dev,
+			     struct hdcp_port_data *data,
+			     struct hdcp2_ake_send_hprime *rx_hprime);
+	int (*store_pairing_info)(struct device *dev,
+				  struct hdcp_port_data *data,
+				  struct hdcp2_ake_send_pairing_info
+								*pairing_info);
+	int (*initiate_locality_check)(struct device *dev,
+				       struct hdcp_port_data *data,
+				       struct hdcp2_lc_init *lc_init_data);
+	int (*verify_lprime)(struct device *dev,
+			     struct hdcp_port_data *data,
+			     struct hdcp2_lc_send_lprime *rx_lprime);
+	int (*get_session_key)(struct device *dev,
+			       struct hdcp_port_data *data,
+			       struct hdcp2_ske_send_eks *ske_data);
+	int (*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);
+	int (*verify_mprime)(struct device *dev,
+			     struct hdcp_port_data *data,
+			     struct hdcp2_rep_stream_ready *stream_ready);
+	int (*enable_hdcp_authentication)(struct device *dev,
+					  struct hdcp_port_data *data);
+	int (*close_hdcp_session)(struct device *dev,
+				  struct hdcp_port_data *data);
+};
+
+/**
+ * struct i915_hdcp_component_master - Used for communication between i915
+ * and mei_hdcp drivers for the HDCP2.2 services
+ * @mei_dev: device that provide the HDCP2.2 service from MEI Bus.
+ * @hdcp_ops: Ops implemented by mei_hdcp driver, used by i915 driver.
+ */
+struct i915_hdcp_comp_master {
+	struct device *mei_dev;
+	const struct i915_hdcp_component_ops *ops;
+
+	/* To protect the above members. */
+	struct mutex mutex;
+};
+
+#endif /* _I915_MEI_HDCP_INTERFACE_H_ */
-- 
2.7.4

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v11 07/42] 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 90ba5436370e..030d962697dd 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -394,6 +394,17 @@ 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

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

[PATCH v11 08/42] drm/i915: MEI interface definition

[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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 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_drv.h       |   6 +
 drivers/gpu/drm/i915/intel_hdcp.c      | 423 ++++++++++++++++++++++++++++++++-
 include/drm/i915_component.h           |   3 +
 6 files changed, 441 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 7de90701f6f1..9c4218b5d153 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -904,6 +904,7 @@ 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 a2293152cb6a..e3d030b73b5b 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"
@@ -2043,6 +2044,12 @@ 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_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 030d962697dd..b5c54c688256 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;
@@ -385,6 +386,9 @@ 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 {
@@ -405,6 +409,7 @@ 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 {
@@ -2070,6 +2075,7 @@ 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_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..79f8979b9150 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 +834,360 @@ 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);
+	struct drm_device *dev = &dev_priv->drm;
+	struct intel_connector *intel_connector;
+	struct drm_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+
+	DRM_DEBUG("I915 HDCP comp unbind\n");
+
+	/* Once the component is unbind, Disable HDCP2.2 on all connectors */
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		intel_connector = to_intel_connector(connector);
+			intel_hdcp_disable(intel_connector);
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	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 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))
@@ -843,9 +1199,42 @@ static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
 
 static void intel_hdcp2_init(struct intel_connector *connector)
 {
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	struct intel_hdcp *hdcp = &connector->hdcp;
+	bool add_component = false;
+	int ret;
+
+	ret = initialize_hdcp_port_data(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
+		return;
+	}
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	/*
+	 * Component for mei is common across the connector.
+	 * Adding the component once is sufficient.
+	 */
+	if (!dev_priv->hdcp_comp_added) {
+		dev_priv->hdcp_comp_added = true;
+		add_component = true;
+	}
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	if (add_component) {
+		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);
+			kfree(hdcp->port_data.streams);
+			return;
+		}
+	}
 
-	/* TODO: MEI interface needs to be initialized here */
 	hdcp->hdcp2_supported = true;
 }
 
@@ -917,6 +1306,38 @@ int intel_hdcp_disable(struct intel_connector *connector)
 	return ret;
 }
 
+void intel_hdcp_cleanup(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+
+	if (!connector->hdcp.shim)
+		return;
+
+	mutex_lock(&connector->hdcp.mutex);
+	if (!connector->hdcp.hdcp2_supported) {
+		mutex_unlock(&connector->hdcp.mutex);
+		return;
+	}
+
+	kfree(connector->hdcp.port_data.streams);
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	/*
+	 * Component for mei is common across the connector.
+	 * Removing the component once is sufficient.
+	 */
+	if (!dev_priv->hdcp_comp_added) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		mutex_unlock(&connector->hdcp.mutex);
+		return;
+	}
+
+	dev_priv->hdcp_comp_added = false;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+	mutex_unlock(&connector->hdcp.mutex);
+
+	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
+}
+
 void intel_hdcp_atomic_check(struct drm_connector *connector,
 			     struct drm_connector_state *old_state,
 			     struct drm_connector_state *new_state)
diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
index 72fbb037f9b3..f3851ba3e4c3 100644
--- a/include/drm/i915_component.h
+++ b/include/drm/i915_component.h
@@ -24,10 +24,13 @@
 #ifndef _I915_COMPONENT_H_
 #define _I915_COMPONENT_H_
 
+#include <linux/device.h>
+
 #include "drm_audio_component.h"
 
 enum i915_component_type {
 	I915_COMPONENT_AUDIO = 1,
+	I915_COMPONENT_HDCP,
 };
 
 /* MAX_PORT is the number of port
-- 
2.7.4

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[PATCH v11 09/42] 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 411bb597a8c6..9dd428e5701a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4782,7 +4782,7 @@ 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 b5c54c688256..b3bdc0f774af 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -399,6 +399,9 @@ 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;
@@ -2072,10 +2075,10 @@ 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_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 79f8979b9150..bcc3f81f714f 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)
 {
@@ -1298,7 +1312,8 @@ 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);
@@ -1370,3 +1385,21 @@ 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 v11 10/42] 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 b3bdc0f774af..8ccb47f36161 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -389,6 +389,10 @@ 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 {
@@ -406,6 +410,9 @@ 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 bcc3f81f714f..db40e47ffad4 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),
@@ -1280,22 +1450,34 @@ 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;
 }
@@ -1312,7 +1494,9 @@ 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 v11 11/42] 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 8ccb47f36161..4b423b59bd4b 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -393,6 +393,22 @@ 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 {
@@ -420,6 +436,24 @@ 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 db40e47ffad4..8bd9f8d6ba34 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 v11 12/42] drm: helper functions for hdcp2 seq_num to from u32

[Ramalingam C]

Library functions for endianness are aligned for 16/32/64 bits.
But hdcp sequence numbers are 24bits(big endian).
So for their conversion to and from u32 helper functions are developed.

v2:
  Comment is updated. [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>
---
 include/drm/drm_hdcp.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index d6dfef8cff6a..7260b31af276 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -252,4 +252,22 @@ struct hdcp2_dp_errata_stream_type {
 #define HDCP_2_2_HDMI_RXSTATUS_READY(x)		((x) & BIT(2))
 #define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x)	((x) & BIT(3))
 
+/*
+ * Helper functions to convert 24bit big endian hdcp sequence number to
+ * host format and back
+ */
+static inline
+u32 drm_hdcp2_seq_num_to_u32(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN])
+{
+	return (u32)(seq_num[2] | seq_num[1] << 8 | seq_num[0] << 16);
+}
+
+static inline
+void drm_hdcp2_u32_to_seq_num(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
+{
+	seq_num[0] = val >> 16;
+	seq_num[1] = val >> 8;
+	seq_num[2] = val;
+}
+
 #endif
-- 
2.7.4

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[PATCH v11 13/42] 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 8bd9f8d6ba34..a6920aaee3af 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 v11 14/42] 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 v11 15/42] 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 4b423b59bd4b..0e8d77d14b2c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -314,6 +314,13 @@ 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
@@ -409,6 +416,9 @@ 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 a6920aaee3af..f350f86a113e 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);
 }
@@ -1738,6 +1814,7 @@ 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)
@@ -1750,18 +1827,19 @@ 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 v11 16/42] 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 f350f86a113e..41ce263d04d1 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 v11 17/42] 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 v11 18/42] 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 9dd428e5701a..8f1a6d3897fb 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5849,6 +5849,333 @@ 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,
@@ -5861,6 +6188,12 @@ 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

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

[PATCH v11 19/42] 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 v11 20/42] 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 8f1a6d3897fb..aff029ea9fa2 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5625,6 +5625,18 @@ 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)
@@ -5969,14 +5981,13 @@ 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;
 	}
@@ -6003,6 +6014,8 @@ 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;
@@ -6018,6 +6031,8 @@ 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 0e8d77d14b2c..53fec115e626 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -464,6 +464,14 @@ 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 41ce263d04d1..6dbd72850f12 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1823,6 +1823,7 @@ 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;
 }
@@ -1960,12 +1961,8 @@ 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 v11 21/42] drm/i915: HDCP state handling in ddi_update_pipe

[Ramalingam C]

The downgrade of the fullmodeset into fastset
intel_encoder->update_pipe, in possible scenario, skips the En/Dis-able
DDI. Hence breaks the HDCP state change handling.

We also don't have any hdcp tests in CI, because the shard runs don't
have hdcp capable outputs :-/

So this change fixs it by handling the HDCP state change request at
intel_encoder->update_pipe too along with enable and disable of the DDI.

Fixes: d19f958db23c ("drm/i915: Enable fastset for non-boot modesets.")

v2:
  Added commit id that broke the HDCP [Daniel]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
cc: Hans de Goede <hdegoede@redhat.com>
cc: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index ca705546a0ab..2323b7cb1d38 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3568,6 +3568,13 @@ static void intel_ddi_update_pipe(struct intel_encoder *encoder,
 {
 	if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
 		intel_ddi_update_pipe_dp(encoder, crtc_state, conn_state);
+
+	if (conn_state->content_protection ==
+	    DRM_MODE_CONTENT_PROTECTION_DESIRED)
+		intel_hdcp_enable(to_intel_connector(conn_state->connector));
+	else if (conn_state->content_protection ==
+		 DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+		intel_hdcp_disable(to_intel_connector(conn_state->connector));
 }
 
 static void intel_ddi_set_fia_lane_count(struct intel_encoder *encoder,
-- 
2.7.4

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[PATCH v11 22/42] 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 v11 23/42] 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>
---
 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 v11 24/42] mei: me: add ice lake point device ids

[Ramalingam C]

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

Add icelake device ids: ICP LP, N and H

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hw-me-regs.h | 4 ++++
 drivers/misc/mei/pci-me.c     | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 23739a60517f..086e557c2872 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -139,6 +139,10 @@
 #define MEI_DEV_ID_CNP_H      0xA360  /* Cannon Point H */
 #define MEI_DEV_ID_CNP_H_4    0xA364  /* Cannon Point H 4 (iTouch) */
 
+#define MEI_DEV_ID_ICP_LP     0x34E0  /* Ice Lake Point LP */
+#define MEI_DEV_ID_ICP_N      0x38E0  /* Ice Lake Point N */
+#define MEI_DEV_ID_ICP_H      0x3DE0  /* Ice Lake Point H */
+
 /*
  * MEI HW Section
  */
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index e89497f858ae..5ed5d28e6fe2 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -105,6 +105,10 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
 	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)},
 	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_4, MEI_ME_PCH8_CFG)},
 
+	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)},
+	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_N, MEI_ME_PCH12_CFG)},
+	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_H, MEI_ME_PCH12_CFG)},
+
 	/* required last entry */
 	{0, }
 };
-- 
2.7.4

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[PATCH v11 25/42] 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>
---
 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 v11 26/42] 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>
---
 drivers/misc/mei/Kconfig         |  7 +++++
 drivers/misc/mei/Makefile        |  2 ++
 drivers/misc/mei/hdcp/Makefile   |  7 +++++
 drivers/misc/mei/hdcp/mei_hdcp.c | 65 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 81 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..9c518b7f0011 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 SoCs.
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..b8580b91e255
--- /dev/null
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -0,0 +1,65 @@
+// 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 v11 27/42] 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 v11 28/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 89 ++++++++++++++++++++++++++++++++++++++++
 drivers/misc/mei/hdcp/mei_hdcp.h | 23 +++++++++++
 2 files changed, 112 insertions(+)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index b8580b91e255..77dda13fcc88 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -23,6 +23,95 @@
 #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(short int port)
+{
+	enum mei_i915_port i915_port = (enum mei_i915_port)port;
+
+	return (u8)(i915_port == PORT_A ? MEI_DDI_A : i915_port);
+}
+
+/**
+ * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
+ * @dev: device corresponding to the mei_cl_device
+ * @hdcp_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..28686f2ae88c 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.h
+++ b/drivers/misc/mei/hdcp/mei_hdcp.h
@@ -363,4 +363,27 @@ 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,
+};
+
+enum mei_i915_port {
+	PORT_NONE = -1,
+
+	PORT_A = 0,
+	PORT_B,
+	PORT_C,
+	PORT_D,
+	PORT_E,
+	PORT_F,
+	I915_MAX_PORTS,
+};
 #endif /* __MEI_HDCP_H__ */
-- 
2.7.4

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[PATCH v11 29/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 77dda13fcc88..4e471657c6f0 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -97,11 +97,92 @@ 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
+ * @hdcp_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 v11 30/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 4e471657c6f0..0bbc6992631a 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -177,13 +177,69 @@ 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
+ * @hdcp_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 v11 31/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 0bbc6992631a..17043fc60d18 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -233,6 +233,64 @@ 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
+ * @hdcp_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,
@@ -240,7 +298,7 @@ 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 v11 32/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 17043fc60d18..c540d03470a6 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -291,6 +291,61 @@ 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
+ * @hdcp_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,
@@ -299,7 +354,7 @@ 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 v11 33/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 c540d03470a6..814d870347a0 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -346,6 +346,64 @@ mei_hdcp_initiate_locality_check(struct device *dev,
 	return 0;
 }
 
+/**
+ * mei_hdcp_verify_lprime() - Verify lprime.
+ * @dev: device corresponding to the mei_cl_device
+ * @hdcp_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,
@@ -355,7 +413,7 @@ 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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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH v11 34/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 814d870347a0..d8665b02d6d5 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -404,6 +404,63 @@ 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
+ * @hdcp_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,
@@ -414,7 +471,7 @@ 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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[PATCH v11 35/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 d8665b02d6d5..a64578cec0c9 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -461,6 +461,80 @@ 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
+ * @hdcp_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,
@@ -472,7 +546,8 @@ 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 v11 36/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 a64578cec0c9..1ebfc4aa2f04 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -535,6 +535,71 @@ 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
+ * @hdcp_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,
@@ -548,7 +613,7 @@ 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 v11 37/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 1ebfc4aa2f04..167ccfeeca9e 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -600,6 +600,59 @@ 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
+ * @hdcp_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,
@@ -614,7 +667,7 @@ 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 v11 38/42] 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]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@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 167ccfeeca9e..615eed149837 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -653,6 +653,59 @@ 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
+ * @hdcp_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,
@@ -668,7 +721,7 @@ 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 v11 39/42] 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.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 83 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 81 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 615eed149837..beba6fb4d2e2 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>
@@ -706,8 +707,7 @@ 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 =
@@ -724,20 +724,99 @@ 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 comp_master_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 match_add_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);
+		mei_cldev_set_drvdata(cldev, NULL);
+		goto match_add_exit;
+	}
+
+	return 0;
+
+match_add_exit:
+	kfree(comp_master);
+comp_master_exit:
+	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 v11 40/42] 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 9c518b7f0011..90ed55210447 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 SoCs.
-- 
2.7.4

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[PATCH v11 41/42] FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4

[Ramalingam C]

Just excluding the LSPCon HDMI ports from the HDCP1.4 testing.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 0bd890c04fe4..6c418e3d2949 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4794,6 +4794,9 @@ static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data)
 {
 	struct drm_connector *connector = m->private;
 	struct intel_connector *intel_connector = to_intel_connector(connector);
+	struct intel_digital_port *intel_dig_port =
+					conn_to_dig_port(intel_connector);
+	bool is_hdcp14;
 
 	if (connector->status != connector_status_connected)
 		return -ENODEV;
@@ -4804,8 +4807,11 @@ static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data)
 
 	seq_printf(m, "%s:%d HDCP version: ", connector->name,
 		   connector->base.id);
-	seq_printf(m, "%s ", !intel_hdcp_capable(intel_connector) ?
-		   "None" : "HDCP1.4");
+
+	/* Excluding the Lspcon for Testing Purpose */
+	is_hdcp14 = intel_hdcp_capable(intel_connector) &&
+		    !intel_dig_port->lspcon.active;
+	seq_printf(m, "%s ", !is_hdcp14 ? "None" : "HDCP1.4");
 	seq_puts(m, "\n");
 
 	return 0;
-- 
2.7.4

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Re: [PATCH v11 08/42] drm/i915: MEI interface definition

[C, Ramalingam]

Daniel,

Due to significant changes @unbind and cleanup, i have dropped your r-b. 
Please review it again.

--Ram

On 2/7/2019 2:33 AM, Ramalingam C wrote:
> 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]
>
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> ---
>   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_drv.h       |   6 +
>   drivers/gpu/drm/i915/intel_hdcp.c      | 423 ++++++++++++++++++++++++++++++++-
>   include/drm/i915_component.h           |   3 +
>   6 files changed, 441 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 7de90701f6f1..9c4218b5d153 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -904,6 +904,7 @@ 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 a2293152cb6a..e3d030b73b5b 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"
> @@ -2043,6 +2044,12 @@ 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_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 030d962697dd..b5c54c688256 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;
> @@ -385,6 +386,9 @@ 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 {
> @@ -405,6 +409,7 @@ 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 {
> @@ -2070,6 +2075,7 @@ 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_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..79f8979b9150 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 +834,360 @@ 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);
> +	struct drm_device *dev = &dev_priv->drm;
> +	struct intel_connector *intel_connector;
> +	struct drm_connector *connector;
> +	struct drm_connector_list_iter conn_iter;
> +
> +	DRM_DEBUG("I915 HDCP comp unbind\n");
> +
> +	/* Once the component is unbind, Disable HDCP2.2 on all connectors */
> +	drm_connector_list_iter_begin(dev, &conn_iter);
> +	drm_for_each_connector_iter(connector, &conn_iter) {
> +		intel_connector = to_intel_connector(connector);
> +			intel_hdcp_disable(intel_connector);
> +	}
> +	drm_connector_list_iter_end(&conn_iter);
> +
> +	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 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))
> @@ -843,9 +1199,42 @@ static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
>   
>   static void intel_hdcp2_init(struct intel_connector *connector)
>   {
> +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>   	struct intel_hdcp *hdcp = &connector->hdcp;
> +	bool add_component = false;
> +	int ret;
> +
> +	ret = initialize_hdcp_port_data(connector);
> +	if (ret) {
> +		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
> +		return;
> +	}
> +
> +	mutex_lock(&dev_priv->hdcp_comp_mutex);
> +	/*
> +	 * Component for mei is common across the connector.
> +	 * Adding the component once is sufficient.
> +	 */
> +	if (!dev_priv->hdcp_comp_added) {
> +		dev_priv->hdcp_comp_added = true;
> +		add_component = true;
> +	}
> +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> +
> +	if (add_component) {
> +		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);
> +			kfree(hdcp->port_data.streams);
> +			return;
> +		}
> +	}
>   
> -	/* TODO: MEI interface needs to be initialized here */
>   	hdcp->hdcp2_supported = true;
>   }
>   
> @@ -917,6 +1306,38 @@ int intel_hdcp_disable(struct intel_connector *connector)
>   	return ret;
>   }
>   
> +void intel_hdcp_cleanup(struct intel_connector *connector)
> +{
> +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> +
> +	if (!connector->hdcp.shim)
> +		return;
> +
> +	mutex_lock(&connector->hdcp.mutex);
> +	if (!connector->hdcp.hdcp2_supported) {
> +		mutex_unlock(&connector->hdcp.mutex);
> +		return;
> +	}
> +
> +	kfree(connector->hdcp.port_data.streams);
> +	mutex_lock(&dev_priv->hdcp_comp_mutex);
> +	/*
> +	 * Component for mei is common across the connector.
> +	 * Removing the component once is sufficient.
> +	 */
> +	if (!dev_priv->hdcp_comp_added) {
> +		mutex_unlock(&dev_priv->hdcp_comp_mutex);
> +		mutex_unlock(&connector->hdcp.mutex);
> +		return;
> +	}
> +
> +	dev_priv->hdcp_comp_added = false;
> +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> +	mutex_unlock(&connector->hdcp.mutex);
> +
> +	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
> +}
> +
>   void intel_hdcp_atomic_check(struct drm_connector *connector,
>   			     struct drm_connector_state *old_state,
>   			     struct drm_connector_state *new_state)
> diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
> index 72fbb037f9b3..f3851ba3e4c3 100644
> --- a/include/drm/i915_component.h
> +++ b/include/drm/i915_component.h
> @@ -24,10 +24,13 @@
>   #ifndef _I915_COMPONENT_H_
>   #define _I915_COMPONENT_H_
>   
> +#include <linux/device.h>
> +
>   #include "drm_audio_component.h"
>   
>   enum i915_component_type {
>   	I915_COMPONENT_AUDIO = 1,
> +	I915_COMPONENT_HDCP,
>   };
>   
>   /* MAX_PORT is the number of port

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[PATCH v11 42/42] FOR_TESTING_ONLY: ICL: Limit clk to <= 340MHz

[Ramalingam C]

Pruning 4k60 modes.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/gpu/drm/i915/intel_hdmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index c2c91e6645a5..d60713cd658c 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1800,6 +1800,9 @@ intel_hdmi_mode_valid(struct drm_connector *connector,
 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return MODE_NO_DBLESCAN;
 
+	if (mode->clock > 340000)
+		return MODE_CLOCK_HIGH;
+
 	clock = mode->clock;
 
 	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
-- 
2.7.4

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✗ Fi.CI.CHECKPATCH: warning for drm/i915: Implement HDCP2.2 (rev17)

[Patchwork]

== Series Details ==

Series: drm/i915: Implement HDCP2.2 (rev17)
URL   : https://patchwork.freedesktop.org/series/38254/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
516981139a84 component: Add documentation
-:38: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#38: 
new file mode 100644

-:43: WARNING:SPDX_LICENSE_TAG: Missing or malformed SPDX-License-Identifier tag in line 1
#43: FILE: Documentation/driver-api/component.rst:1:
+======================================

total: 0 errors, 2 warnings, 0 checks, 282 lines checked
444ba1201ed4 components: multiple components for a device
-:39: WARNING:FUNCTION_ARGUMENTS: function definition argument 'struct device *' should also have an identifier name
#39: FILE: drivers/base/component.c:50:
+	int (*compare_typed)(struct device *, int, void *);

-:39: WARNING:FUNCTION_ARGUMENTS: function definition argument 'int' should also have an identifier name
#39: FILE: drivers/base/component.c:50:
+	int (*compare_typed)(struct device *, int, void *);

-:39: WARNING:FUNCTION_ARGUMENTS: function definition argument 'void *' should also have an identifier name
#39: FILE: drivers/base/component.c:50:
+	int (*compare_typed)(struct device *, int, void *);

-:110: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#110: FILE: drivers/base/component.c:338:
+static void __component_match_add(struct device *master,
 	struct component_match **matchptr,

-:151: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#151: FILE: drivers/base/component.c:402:
+void component_match_add_release(struct device *master,
+	struct component_match **matchptr,

-:178: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#178: FILE: drivers/base/component.c:429:
+void component_match_add_typed(struct device *master,
+	struct component_match **matchptr,

-:207: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#207: FILE: drivers/base/component.c:666:
+static int __component_add(struct device *dev, const struct component_ops *ops,
+	int subcomponent)

-:244: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#244: FILE: drivers/base/component.c:717:
+int component_add_typed(struct device *dev, const struct component_ops *ops,
+	int subcomponent)

-:284: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#284: FILE: include/linux/component.h:37:
+int component_add_typed(struct device *dev, const struct component_ops *ops,
+	int subcomponent);

-:293: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#293: FILE: include/linux/component.h:96:
+void component_match_add_typed(struct device *master,
+	struct component_match **matchptr,

total: 0 errors, 3 warnings, 7 checks, 261 lines checked
a833383b43f2 drm/doc: document recommended component helper usage
-:17: WARNING:SPDX_LICENSE_TAG: Missing or malformed SPDX-License-Identifier tag in line 1
#17: FILE: Documentation/driver-api/component.rst:1:
+.. _component:

total: 0 errors, 1 warnings, 0 checks, 36 lines checked
d1c82bfa0911 i915/snd_hdac: I915 subcomponent for the snd_hdac
94a2270a8039 drm/i915: Gathering the HDCP1.4 routines together
9e2ea7656119 drm: header for i915 - MEI_HDCP interface
-:23: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#23: 
new file mode 100644

total: 0 errors, 1 warnings, 0 checks, 148 lines checked
1513494ef206 drm/i915: Initialize HDCP2.2
0fa0b04ecd61 drm/i915: MEI interface definition
017da86c45fc drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking
aa261c188b63 drm/i915: Enable and Disable of HDCP2.2
840686394856 drm/i915: Implement HDCP2.2 receiver authentication
39783561f468 drm: helper functions for hdcp2 seq_num to from u32
fdc09b717b1b drm/i915: Implement HDCP2.2 repeater authentication
974e474ba4d5 drm: HDCP2.2 link check period
3756ee38833f drm/i915: Implement HDCP2.2 link integrity check
5d092f3fe1cb drm/i915: Handle HDCP2.2 downstream topology change
87932a00123c drm: removing the DP Errata msg and its msg id
c6da48f30315 drm/i915: Implement the HDCP2.2 support for DP
66a8f80b7b5b drm/i915: Implement the HDCP2.2 support for HDMI
ee9a67e17e82 drm/i915: CP_IRQ handling for DP HDCP2.2 msgs
7c8afc9c155c drm/i915: HDCP state handling in ddi_update_pipe
d3b615a7a6a9 drm/i915: Fix KBL HDCP2.2 encrypt status signalling
e8699a21e5f7 mei: bus: whitelist hdcp client
a6c5b5de1973 mei: me: add ice lake point device ids
072a2045481f mei: bus: export to_mei_cl_device for mei client device drivers
3af82cf8a6d1 misc/mei/hdcp: Client driver for HDCP application
-:76: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#76: 
new file mode 100644

total: 0 errors, 1 warnings, 0 checks, 87 lines checked
85960a830643 misc/mei/hdcp: Define ME FW interface for HDCP2.2
-:30: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#30: 
new file mode 100644

total: 0 errors, 1 warnings, 0 checks, 366 lines checked
3e606d411906 misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session
200e5abc2da2 misc/mei/hdcp: Verify Receiver Cert and prepare km
d6dd3b4f6cb8 misc/mei/hdcp: Verify H_prime
5f056ee6879c misc/mei/hdcp: Store the HDCP Pairing info
ebf0e1f7374f misc/mei/hdcp: Initiate Locality check
cad42120e2a4 misc/mei/hdcp: Verify L_prime
d1edc7839baa misc/mei/hdcp: Prepare Session Key
40ca07fdef1c misc/mei/hdcp: Repeater topology verification and ack
19babb90f880 misc/mei/hdcp: Verify M_prime
e14d9d28f65d misc/mei/hdcp: Enabling the HDCP authentication
cf2fdfa4c242 misc/mei/hdcp: Closing wired HDCP2.2 Tx Session
3dc2c3442945 misc/mei/hdcp: Component framework for I915 Interface
7490ea0bbf14 FOR_TEST_ONLY: i915/Kconfig: Select mei_hdcp by I915
f6162e97e3d0 FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4
20ceed620065 FOR_TESTING_ONLY: ICL: Limit clk to <= 340MHz

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✗ Fi.CI.SPARSE: warning for drm/i915: Implement HDCP2.2 (rev17)

[Patchwork]

== Series Details ==

Series: drm/i915: Implement HDCP2.2 (rev17)
URL   : https://patchwork.freedesktop.org/series/38254/
State : warning

== Summary ==

$ dim sparse origin/drm-tip
Sparse version: v0.5.2
Commit: component: Add documentation
Okay!

Commit: components: multiple components for a device
Okay!

Commit: drm/doc: document recommended component helper usage
Okay!

Commit: i915/snd_hdac: I915 subcomponent for the snd_hdac
Okay!

Commit: drm/i915: Gathering the HDCP1.4 routines together
Okay!

Commit: drm: header for i915 - MEI_HDCP interface
Okay!

Commit: drm/i915: Initialize HDCP2.2
Okay!

Commit: drm/i915: MEI interface definition
-drivers/gpu/drm/i915/selftests/../i915_drv.h:3565:16: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/selftests/../i915_drv.h:3572:16: warning: expression using sizeof(void)
+./include/linux/slab.h:664:13: error: not a function <noident>

Commit: drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking
+drivers/gpu/drm/i915/intel_hdcp.c:749:5: warning: symbol 'intel_hdcp_check_link' was not declared. Should it be static?

Commit: drm/i915: Enable and Disable of HDCP2.2
Okay!

Commit: drm/i915: Implement HDCP2.2 receiver authentication
Okay!

Commit: drm: helper functions for hdcp2 seq_num to from u32
Okay!

Commit: drm/i915: Implement HDCP2.2 repeater authentication
Okay!

Commit: drm: HDCP2.2 link check period
Okay!

Commit: drm/i915: Implement HDCP2.2 link integrity check
Okay!

Commit: drm/i915: Handle HDCP2.2 downstream topology change
Okay!

Commit: drm: removing the DP Errata msg and its msg id
Okay!

Commit: drm/i915: Implement the HDCP2.2 support for DP
Okay!

Commit: drm/i915: Implement the HDCP2.2 support for HDMI
Okay!

Commit: drm/i915: CP_IRQ handling for DP HDCP2.2 msgs
Okay!

Commit: drm/i915: HDCP state handling in ddi_update_pipe
Okay!

Commit: drm/i915: Fix KBL HDCP2.2 encrypt status signalling
Okay!

Commit: mei: bus: whitelist hdcp client
Okay!

Commit: mei: me: add ice lake point device ids
Okay!

Commit: mei: bus: export to_mei_cl_device for mei client device drivers
Okay!

Commit: misc/mei/hdcp: Client driver for HDCP application
+Error in reading or end of file.

Commit: misc/mei/hdcp: Define ME FW interface for HDCP2.2
Okay!

Commit: misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session
Okay!

Commit: misc/mei/hdcp: Verify Receiver Cert and prepare km
Okay!

Commit: misc/mei/hdcp: Verify H_prime
Okay!

Commit: misc/mei/hdcp: Store the HDCP Pairing info
Okay!

Commit: misc/mei/hdcp: Initiate Locality check
Okay!

Commit: misc/mei/hdcp: Verify L_prime
Okay!

Commit: misc/mei/hdcp: Prepare Session Key
Okay!

Commit: misc/mei/hdcp: Repeater topology verification and ack
Okay!

Commit: misc/mei/hdcp: Verify M_prime
Okay!

Commit: misc/mei/hdcp: Enabling the HDCP authentication
Okay!

Commit: misc/mei/hdcp: Closing wired HDCP2.2 Tx Session
Okay!

Commit: misc/mei/hdcp: Component framework for I915 Interface
Okay!

Commit: FOR_TEST_ONLY: i915/Kconfig: Select mei_hdcp by I915
Okay!

Commit: FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4
Okay!

Commit: FOR_TESTING_ONLY: ICL: Limit clk to <= 340MHz
Okay!

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✓ Fi.CI.BAT: success for drm/i915: Implement HDCP2.2 (rev17)

[Patchwork]

== Series Details ==

Series: drm/i915: Implement HDCP2.2 (rev17)
URL   : https://patchwork.freedesktop.org/series/38254/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_5555 -> Patchwork_12164
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://patchwork.freedesktop.org/api/1.0/series/38254/revisions/17/mbox/

Known issues
------------

  Here are the changes found in Patchwork_12164 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@amdgpu/amd_basic@cs-compute:
    - fi-kbl-8809g:       NOTRUN -> FAIL [fdo#108094]

  
#### Possible fixes ####

  * igt@amdgpu/amd_basic@userptr:
    - fi-kbl-8809g:       DMESG-WARN [fdo#108965] -> PASS

  * igt@kms_chamelium@hdmi-hpd-fast:
    - fi-kbl-7500u:       FAIL [fdo#109485] -> PASS

  * igt@kms_pipe_crc_basic@suspend-read-crc-pipe-b:
    - fi-blb-e6850:       INCOMPLETE [fdo#107718] -> PASS

  * igt@prime_vgem@basic-fence-flip:
    - fi-gdg-551:         FAIL [fdo#103182] -> PASS

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#103182]: https://bugs.freedesktop.org/show_bug.cgi?id=103182
  [fdo#107718]: https://bugs.freedesktop.org/show_bug.cgi?id=107718
  [fdo#108094]: https://bugs.freedesktop.org/show_bug.cgi?id=108094
  [fdo#108965]: https://bugs.freedesktop.org/show_bug.cgi?id=108965
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109485]: https://bugs.freedesktop.org/show_bug.cgi?id=109485


Participating hosts (48 -> 44)
------------------------------

  Additional (1): fi-skl-6700hq 
  Missing    (5): fi-kbl-soraka fi-hsw-4770r fi-ilk-m540 fi-byt-squawks fi-bsw-cyan 


Build changes
-------------

    * Linux: CI_DRM_5555 -> Patchwork_12164

  CI_DRM_5555: 32921c0fea5f59e84d71d6bd1c383962a78068ab @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4812: 592b854fead32c2b0dac7198edfb9a6bffd66932 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_12164: 20ceed620065a691ef016b0fdcb19366c60fe98c @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

20ceed620065 FOR_TESTING_ONLY: ICL: Limit clk to <= 340MHz
f6162e97e3d0 FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4
7490ea0bbf14 FOR_TEST_ONLY: i915/Kconfig: Select mei_hdcp by I915
3dc2c3442945 misc/mei/hdcp: Component framework for I915 Interface
cf2fdfa4c242 misc/mei/hdcp: Closing wired HDCP2.2 Tx Session
e14d9d28f65d misc/mei/hdcp: Enabling the HDCP authentication
19babb90f880 misc/mei/hdcp: Verify M_prime
40ca07fdef1c misc/mei/hdcp: Repeater topology verification and ack
d1edc7839baa misc/mei/hdcp: Prepare Session Key
cad42120e2a4 misc/mei/hdcp: Verify L_prime
ebf0e1f7374f misc/mei/hdcp: Initiate Locality check
5f056ee6879c misc/mei/hdcp: Store the HDCP Pairing info
d6dd3b4f6cb8 misc/mei/hdcp: Verify H_prime
200e5abc2da2 misc/mei/hdcp: Verify Receiver Cert and prepare km
3e606d411906 misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session
85960a830643 misc/mei/hdcp: Define ME FW interface for HDCP2.2
3af82cf8a6d1 misc/mei/hdcp: Client driver for HDCP application
072a2045481f mei: bus: export to_mei_cl_device for mei client device drivers
a6c5b5de1973 mei: me: add ice lake point device ids
e8699a21e5f7 mei: bus: whitelist hdcp client
d3b615a7a6a9 drm/i915: Fix KBL HDCP2.2 encrypt status signalling
7c8afc9c155c drm/i915: HDCP state handling in ddi_update_pipe
ee9a67e17e82 drm/i915: CP_IRQ handling for DP HDCP2.2 msgs
66a8f80b7b5b drm/i915: Implement the HDCP2.2 support for HDMI
c6da48f30315 drm/i915: Implement the HDCP2.2 support for DP
87932a00123c drm: removing the DP Errata msg and its msg id
5d092f3fe1cb drm/i915: Handle HDCP2.2 downstream topology change
3756ee38833f drm/i915: Implement HDCP2.2 link integrity check
974e474ba4d5 drm: HDCP2.2 link check period
fdc09b717b1b drm/i915: Implement HDCP2.2 repeater authentication
39783561f468 drm: helper functions for hdcp2 seq_num to from u32
840686394856 drm/i915: Implement HDCP2.2 receiver authentication
aa261c188b63 drm/i915: Enable and Disable of HDCP2.2
017da86c45fc drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking
0fa0b04ecd61 drm/i915: MEI interface definition
1513494ef206 drm/i915: Initialize HDCP2.2
9e2ea7656119 drm: header for i915 - MEI_HDCP interface
94a2270a8039 drm/i915: Gathering the HDCP1.4 routines together
d1c82bfa0911 i915/snd_hdac: I915 subcomponent for the snd_hdac
a833383b43f2 drm/doc: document recommended component helper usage
444ba1201ed4 components: multiple components for a device
516981139a84 component: Add documentation

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_12164/
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✓ Fi.CI.IGT: success for drm/i915: Implement HDCP2.2 (rev17)

[Patchwork]

== Series Details ==

Series: drm/i915: Implement HDCP2.2 (rev17)
URL   : https://patchwork.freedesktop.org/series/38254/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_5555_full -> Patchwork_12164_full
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  

Known issues
------------

  Here are the changes found in Patchwork_12164_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_schedule@pi-ringfull-vebox:
    - shard-kbl:          NOTRUN -> FAIL [fdo#103158]

  * igt@kms_available_modes_crc@available_mode_test_crc:
    - shard-glk:          PASS -> FAIL [fdo#106641]

  * igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-b:
    - shard-kbl:          NOTRUN -> DMESG-WARN [fdo#107956] +1

  * igt@kms_cursor_crc@cursor-256x85-onscreen:
    - shard-apl:          PASS -> FAIL [fdo#103232] +2

  * igt@kms_frontbuffer_tracking@fbc-1p-primscrn-cur-indfb-draw-pwrite:
    - shard-apl:          PASS -> FAIL [fdo#103167] +1

  * igt@kms_frontbuffer_tracking@fbc-1p-primscrn-spr-indfb-draw-mmap-gtt:
    - shard-glk:          PASS -> FAIL [fdo#103167]

  * igt@kms_plane@pixel-format-pipe-b-planes-source-clamping:
    - shard-glk:          PASS -> FAIL [fdo#108948]

  * igt@kms_plane@pixel-format-pipe-c-planes:
    - shard-apl:          PASS -> FAIL [fdo#103166]

  * igt@kms_plane_alpha_blend@pipe-c-alpha-opaque-fb:
    - shard-glk:          PASS -> FAIL [fdo#108145]

  * igt@kms_plane_multiple@atomic-pipe-a-tiling-y:
    - shard-glk:          PASS -> FAIL [fdo#103166]

  * igt@kms_setmode@basic:
    - shard-apl:          PASS -> FAIL [fdo#99912]

  
#### Possible fixes ####

  * igt@kms_color@pipe-a-ctm-max:
    - shard-apl:          FAIL [fdo#108147] -> PASS

  * igt@kms_cursor_crc@cursor-128x42-random:
    - shard-apl:          FAIL [fdo#103232] -> PASS

  * igt@kms_cursor_crc@cursor-256x256-suspend:
    - shard-glk:          FAIL [fdo#103232] -> PASS

  * igt@kms_cursor_crc@cursor-alpha-opaque:
    - shard-glk:          FAIL [fdo#109350] -> PASS

  * igt@kms_frontbuffer_tracking@fbc-1p-primscrn-spr-indfb-onoff:
    - shard-apl:          FAIL [fdo#103167] -> PASS

  * igt@kms_frontbuffer_tracking@fbc-2p-primscrn-spr-indfb-draw-render:
    - shard-glk:          FAIL [fdo#103167] -> PASS

  * igt@kms_vblank@pipe-a-wait-busy-hang:
    - shard-glk:          INCOMPLETE [fdo#103359] / [k.org#198133] -> PASS

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#103158]: https://bugs.freedesktop.org/show_bug.cgi?id=103158
  [fdo#103166]: https://bugs.freedesktop.org/show_bug.cgi?id=103166
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#103232]: https://bugs.freedesktop.org/show_bug.cgi?id=103232
  [fdo#103359]: https://bugs.freedesktop.org/show_bug.cgi?id=103359
  [fdo#106641]: https://bugs.freedesktop.org/show_bug.cgi?id=106641
  [fdo#107956]: https://bugs.freedesktop.org/show_bug.cgi?id=107956
  [fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
  [fdo#108147]: https://bugs.freedesktop.org/show_bug.cgi?id=108147
  [fdo#108597]: https://bugs.freedesktop.org/show_bug.cgi?id=108597
  [fdo#108948]: https://bugs.freedesktop.org/show_bug.cgi?id=108948
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109278]: https://bugs.freedesktop.org/show_bug.cgi?id=109278
  [fdo#109350]: https://bugs.freedesktop.org/show_bug.cgi?id=109350
  [fdo#99912]: https://bugs.freedesktop.org/show_bug.cgi?id=99912
  [k.org#198133]: https://bugzilla.kernel.org/show_bug.cgi?id=198133


Participating hosts (7 -> 5)
------------------------------

  Missing    (2): shard-skl shard-iclb 


Build changes
-------------

    * Linux: CI_DRM_5555 -> Patchwork_12164

  CI_DRM_5555: 32921c0fea5f59e84d71d6bd1c383962a78068ab @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4812: 592b854fead32c2b0dac7198edfb9a6bffd66932 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_12164: 20ceed620065a691ef016b0fdcb19366c60fe98c @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_12164/
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RE: [PATCH v11 24/42] mei: me: add ice lake point device ids

[Winkler, Tomas]

> 
> From: Tomas Winkler <tomas.winkler@intel.com>
> 
> Add icelake device ids: ICP LP, N and H
> 
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
NACK, this goes via mei driver submission process.
Please drop it from the series. 

> ---
>  drivers/misc/mei/hw-me-regs.h | 4 ++++
>  drivers/misc/mei/pci-me.c     | 4 ++++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
> index 23739a60517f..086e557c2872 100644
> --- a/drivers/misc/mei/hw-me-regs.h
> +++ b/drivers/misc/mei/hw-me-regs.h
> @@ -139,6 +139,10 @@
>  #define MEI_DEV_ID_CNP_H      0xA360  /* Cannon Point H */
>  #define MEI_DEV_ID_CNP_H_4    0xA364  /* Cannon Point H 4 (iTouch) */
> 
> +#define MEI_DEV_ID_ICP_LP     0x34E0  /* Ice Lake Point LP */
> +#define MEI_DEV_ID_ICP_N      0x38E0  /* Ice Lake Point N */
> +#define MEI_DEV_ID_ICP_H      0x3DE0  /* Ice Lake Point H */
> +
>  /*
>   * MEI HW Section
>   */
> diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index
> e89497f858ae..5ed5d28e6fe2 100644
> --- a/drivers/misc/mei/pci-me.c
> +++ b/drivers/misc/mei/pci-me.c
> @@ -105,6 +105,10 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
>  	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)},
>  	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_4, MEI_ME_PCH8_CFG)},
> 
> +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)},
> +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_N, MEI_ME_PCH12_CFG)},
> +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_H, MEI_ME_PCH12_CFG)},
> +
>  	/* required last entry */
>  	{0, }
>  };
> --
> 2.7.4

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RE: [PATCH v11 24/42] mei: me: add ice lake point device ids

[C, Ramalingam]

Sure. Intention was enabling the HDCP2.2 testing on CI for ICL. I will drop this patch, instead I will cherry-pick the one you have published for other branch.


Best Regards,
Ramalingam C


> -----Original Message-----
> From: Winkler, Tomas
> Sent: Thursday, February 7, 2019 12:47 PM
> To: C, Ramalingam <ramalingam.c@intel.com>; intel-gfx@lists.freedesktop.org;
> dri-devel@lists.freedesktop.org; daniel.vetter@ffwll.ch; Shankar, Uma
> <uma.shankar@intel.com>
> Subject: RE: [PATCH v11 24/42] mei: me: add ice lake point device ids
> 
> 
> >
> > From: Tomas Winkler <tomas.winkler@intel.com>
> >
> > Add icelake device ids: ICP LP, N and H
> >
> > Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
> NACK, this goes via mei driver submission process.
> Please drop it from the series.
> 
> > ---
> >  drivers/misc/mei/hw-me-regs.h | 4 ++++
> >  drivers/misc/mei/pci-me.c     | 4 ++++
> >  2 files changed, 8 insertions(+)
> >
> > diff --git a/drivers/misc/mei/hw-me-regs.h
> > b/drivers/misc/mei/hw-me-regs.h index 23739a60517f..086e557c2872
> > 100644
> > --- a/drivers/misc/mei/hw-me-regs.h
> > +++ b/drivers/misc/mei/hw-me-regs.h
> > @@ -139,6 +139,10 @@
> >  #define MEI_DEV_ID_CNP_H      0xA360  /* Cannon Point H */
> >  #define MEI_DEV_ID_CNP_H_4    0xA364  /* Cannon Point H 4 (iTouch) */
> >
> > +#define MEI_DEV_ID_ICP_LP     0x34E0  /* Ice Lake Point LP */
> > +#define MEI_DEV_ID_ICP_N      0x38E0  /* Ice Lake Point N */
> > +#define MEI_DEV_ID_ICP_H      0x3DE0  /* Ice Lake Point H */
> > +
> >  /*
> >   * MEI HW Section
> >   */
> > diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
> > index
> > e89497f858ae..5ed5d28e6fe2 100644
> > --- a/drivers/misc/mei/pci-me.c
> > +++ b/drivers/misc/mei/pci-me.c
> > @@ -105,6 +105,10 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
> >  	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)},
> >  	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_4, MEI_ME_PCH8_CFG)},
> >
> > +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)},
> > +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_N, MEI_ME_PCH12_CFG)},
> > +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_H, MEI_ME_PCH12_CFG)},
> > +
> >  	/* required last entry */
> >  	{0, }
> >  };
> > --
> > 2.7.4

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Re: [PATCH v11 24/42] mei: me: add ice lake point device ids

[Daniel Vetter]

On Thu, Feb 07, 2019 at 07:22:37AM +0000, C, Ramalingam wrote:
> Sure. Intention was enabling the HDCP2.2 testing on CI for ICL. I will
> drop this patch, instead I will cherry-pick the one you have published
> for other branch.

We still need this for merging in some form, otherwise CI on our end can't
really test stuff. I think a topic branch with everything mei related
would be best.
> 
> 
> Best Regards,
> Ramalingam C
> 
> 
> > -----Original Message-----
> > From: Winkler, Tomas
> > Sent: Thursday, February 7, 2019 12:47 PM
> > To: C, Ramalingam <ramalingam.c@intel.com>; intel-gfx@lists.freedesktop.org;
> > dri-devel@lists.freedesktop.org; daniel.vetter@ffwll.ch; Shankar, Uma
> > <uma.shankar@intel.com>
> > Subject: RE: [PATCH v11 24/42] mei: me: add ice lake point device ids
> > 
> > 
> > >
> > > From: Tomas Winkler <tomas.winkler@intel.com>
> > >
> > > Add icelake device ids: ICP LP, N and H
> > >
> > > Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Aside from the actual discussion: When you send around a patch from
someone else, always add your own s-o-b line.
-Daniel

> > NACK, this goes via mei driver submission process.
> > Please drop it from the series.
> > 
> > > ---
> > >  drivers/misc/mei/hw-me-regs.h | 4 ++++
> > >  drivers/misc/mei/pci-me.c     | 4 ++++
> > >  2 files changed, 8 insertions(+)
> > >
> > > diff --git a/drivers/misc/mei/hw-me-regs.h
> > > b/drivers/misc/mei/hw-me-regs.h index 23739a60517f..086e557c2872
> > > 100644
> > > --- a/drivers/misc/mei/hw-me-regs.h
> > > +++ b/drivers/misc/mei/hw-me-regs.h
> > > @@ -139,6 +139,10 @@
> > >  #define MEI_DEV_ID_CNP_H      0xA360  /* Cannon Point H */
> > >  #define MEI_DEV_ID_CNP_H_4    0xA364  /* Cannon Point H 4 (iTouch) */
> > >
> > > +#define MEI_DEV_ID_ICP_LP     0x34E0  /* Ice Lake Point LP */
> > > +#define MEI_DEV_ID_ICP_N      0x38E0  /* Ice Lake Point N */
> > > +#define MEI_DEV_ID_ICP_H      0x3DE0  /* Ice Lake Point H */
> > > +
> > >  /*
> > >   * MEI HW Section
> > >   */
> > > diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
> > > index
> > > e89497f858ae..5ed5d28e6fe2 100644
> > > --- a/drivers/misc/mei/pci-me.c
> > > +++ b/drivers/misc/mei/pci-me.c
> > > @@ -105,6 +105,10 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
> > >  	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)},
> > >  	{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_4, MEI_ME_PCH8_CFG)},
> > >
> > > +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)},
> > > +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_N, MEI_ME_PCH12_CFG)},
> > > +	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_H, MEI_ME_PCH12_CFG)},
> > > +
> > >  	/* required last entry */
> > >  	{0, }
> > >  };
> > > --
> > > 2.7.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH v11 01/42] component: Add documentation

[Winkler, Tomas]

> 
> From: Daniel Vetter <daniel.vetter@intel.com>
> 
> While typing these I think doing an s/component_master/aggregate/ would be
> useful:
> - it's shorter :-)
> - I think component/aggregate is much more meaningful naming than
>   component/puppetmaster or something like that. At least to my
>   English ear "aggregate" emphasizes much more the "assemble a pile of
>   things into something bigger" aspect, and there's not really much
>   of a control hierarchy between aggregate and constituing components.
> 
> But that's way more than a quick doc typing exercise ...
> 
> Thanks to Ram for commenting on an initial draft of these docs.
> 
> v2: Review from Rafael:
> - git add Documenation/driver-api/component.rst
> - lots of polish to the wording + spelling fixes.
> 
> v3: Review from Russell:
> - s/framework/helper
> - clarify the documentation for component_match_add functions.
> 
> Cc: "C, Ramalingam" <ramalingam.c@intel.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <rmk+kernel@arm.linux.org.uk>
> Cc: Rafael J. Wysocki <rafael@kernel.org>
> Cc: Jaroslav Kysela <perex@perex.cz>
> Cc: Takashi Iwai <tiwai@suse.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> ---
>  Documentation/driver-api/component.rst   |  17 +++++
Not sure if you care, but the file missing the SPDX header.

Thanks
Tomas

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Re: [PATCH v11 05/42] drm/i915: Gathering the HDCP1.4 routines together

[Winkler, Tomas]

> 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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RE: [PATCH v11 06/42] drm: header for i915 - MEI_HDCP interface

[Winkler, Tomas]

> 
> Header defines the interface for the I915 and MEI_HDCP drivers.
> This interface is specific to the usage of mei_hdcp from gen9+ platforms for
> ME FW based HDCP2.2 services.
> 
> And Generic HDCP2.2 protocol specific definitions are added at
> drm/drm_hdcp.h.
> 
> v2:
>   Commit msg is enhanced [Daniel]
> v3:
>   i915_hdcp_comp_master is defined.
> 
> 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/i915_mei_hdcp_interface.h | 148
> ++++++++++++++++++++++++++++++++++
>  1 file changed, 148 insertions(+)
>  create mode 100644 include/drm/i915_mei_hdcp_interface.h
> 
> diff --git a/include/drm/i915_mei_hdcp_interface.h
> b/include/drm/i915_mei_hdcp_interface.h
> new file mode 100644
> index 000000000000..bc5b0c71ed3c
> --- /dev/null
> +++ b/include/drm/i915_mei_hdcp_interface.h
> @@ -0,0 +1,148 @@
> +/* SPDX-License-Identifier: (GPL-2.0+) */
> +/*
> + * Copyright © 2017-2018 Intel Corporation
> + *
> + * Authors:
> + * Ramalingam C <ramalingam.c@intel.com>  */
> +
> +#ifndef _I915_MEI_HDCP_INTERFACE_H_
> +#define _I915_MEI_HDCP_INTERFACE_H_
> +
> +#include <linux/mutex.h>
> +#include <linux/device.h>
> +#include <drm/drm_hdcp.h>
> +
> +/**
> + * enum hdcp_port_type - HDCP port implementation type defined by ME FW
> + * @HDCP_PORT_TYPE_INVALID: Invalid hdcp port type
> + * @HDCP_PORT_TYPE_INTEGRATED: In-Host HDCP2.x port
> + * @HDCP_PORT_TYPE_LSPCON: HDCP2.2 discrete wired Tx port with LSPCON
> + *			   (HDMI 2.0) solution
> + * @HDCP_PORT_TYPE_CPDP: HDCP2.2 discrete wired Tx port using the CPDP
> (DP 1.3)
> + *			 solution
> + */
> +enum hdcp_port_type {
> +	HDCP_PORT_TYPE_INVALID,
> +	HDCP_PORT_TYPE_INTEGRATED,
> +	HDCP_PORT_TYPE_LSPCON,
> +	HDCP_PORT_TYPE_CPDP
> +};
> +
> +/**
> + * enum hdcp_wired_protocol - HDCP adaptation used on the port
> + * @HDCP_PROTOCOL_INVALID: Invalid HDCP adaptation protocol
> + * @HDCP_PROTOCOL_HDMI: HDMI adaptation of HDCP used on the port
> + * @HDCP_PROTOCOL_DP: DP adaptation of HDCP used on the port  */ enum
> +hdcp_wired_protocol {
> +	HDCP_PROTOCOL_INVALID,
> +	HDCP_PROTOCOL_HDMI,
> +	HDCP_PROTOCOL_DP
> +};
> +
> +/**
> + * struct hdcp_port_data - intel specific HDCP port data
> + * @port: port index as per I915
> + * @port_type: HDCP port type as per ME FW classification
> + * @protocol: HDCP adaptation as per ME FW
> + * @k: No of streams transmitted on a port. Only on DP MST this is != 1
> + * @seq_num_m: 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.
> + * @streams: struct hdcp2_streamid_type[k]. Defines the type and id for the
> + *	     streams
> + */
> +struct hdcp_port_data {
> +	short int port;


I wonder why 'short int'  u are assigning it from the encoder 'enum port {} '
Then you down casting it to u8.
Maybe is best to export the eum port from intel_drv.h to include/drm/i915_*.h 

Thanks
Tomas 
> --
> 2.7.4

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Re: [PATCH v11 07/42] drm/i915: Initialize HDCP2.2

[Winkler, Tomas]

> 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 90ba5436370e..030d962697dd 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -394,6 +394,17 @@ 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;
Is this enough, you can have SKU where this is not enabled, and you can detect that only during runtime.
> +
> +	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);
Won't this depend on the driver load order?
Thanks
Tomas

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Re: [PATCH v11 07/42] drm/i915: Initialize HDCP2.2

[C, Ramalingam]

On 2/7/2019 8:43 PM, Winkler, Tomas wrote:
>> 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 90ba5436370e..030d962697dd 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -394,6 +394,17 @@ 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;
> Is this enough, you can have SKU where this is not enabled, and you can detect that only during runtime.
Best approach will be failing the HDCP2.2 support for such SKUs. But at 
present I am not aware of any. If there is any we can always add here.

In the absence of the details about SKU with no HDCP support, even 
though init will assume
the HDCP2.2 support based on the MEI_HDCP config variable,
     mei_dev with UUID wont be available hence driver-device bind wont 
occur hence I915-MEI interface will never be complete and/or
     HDCP2_CMDs passed from mei_hdcp to MEI_FW will fail.
Hence HDCP2.2 will not attempted/succeed from I915.

Basically nothing will blow up here.
>> +
>> +	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);
> Won't this depend on the driver load order?
With Component usage for this interface, this interface can go down and 
come up any point in time. Its handled with appropriate locks.
Irrespective of the load order between i915 and mei_hdcp, when both 
drivers are up only then interface will be complete between them.

-Ram
> Thanks
> Tomas
>

_______________________________________________
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Intel-gfx@lists.freedesktop.org
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Re: [PATCH v11 08/42] drm/i915: MEI interface definition

[Daniel Vetter]

On Thu, Feb 07, 2019 at 02:33:57AM +0530, Ramalingam C wrote:
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> ---
>  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_drv.h       |   6 +
>  drivers/gpu/drm/i915/intel_hdcp.c      | 423 ++++++++++++++++++++++++++++++++-
>  include/drm/i915_component.h           |   3 +
>  6 files changed, 441 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 7de90701f6f1..9c4218b5d153 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -904,6 +904,7 @@ 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 a2293152cb6a..e3d030b73b5b 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"
> @@ -2043,6 +2044,12 @@ 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_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 030d962697dd..b5c54c688256 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;
> @@ -385,6 +386,9 @@ 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 {
> @@ -405,6 +409,7 @@ 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 {
> @@ -2070,6 +2075,7 @@ 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_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..79f8979b9150 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 +834,360 @@ 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);
> +	struct drm_device *dev = &dev_priv->drm;
> +	struct intel_connector *intel_connector;
> +	struct drm_connector *connector;
> +	struct drm_connector_list_iter conn_iter;
> +
> +	DRM_DEBUG("I915 HDCP comp unbind\n");
> +
> +	/* Once the component is unbind, Disable HDCP2.2 on all connectors */
> +	drm_connector_list_iter_begin(dev, &conn_iter);
> +	drm_for_each_connector_iter(connector, &conn_iter) {
> +		intel_connector = to_intel_connector(connector);
> +			intel_hdcp_disable(intel_connector);
> +	}
> +	drm_connector_list_iter_end(&conn_iter);

I played this through, and I think we have a bug here.

1. Userspace asks for hdcp, sets connector_state->content_protection to
DESIRED
2. hdcp is enabled, userspace visible value is now ENABLED
2. mei unloads
3. we disable content protection here
4. hdcp->value is set to UNDESIRED
5. intel_hdcp_prop_work does _not_ update
connector_state->content_protection (this is correct, because otherwise
dpms off/on would break and we would not try to restore)
6. Userspace still sees ENABLED, which is wrong

I think the better solution is to not call intel_hdcp_disable here at all,
but instead wait for the link status check work to notice that ME is gone,
which will the correctly change status from ENABLED to DESIRED.

So just the below code is needed I think

Otherwise looks good to me, with the ebove loop removed:

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>


> +
> +	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 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))
> @@ -843,9 +1199,42 @@ static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
>  
>  static void intel_hdcp2_init(struct intel_connector *connector)
>  {
> +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>  	struct intel_hdcp *hdcp = &connector->hdcp;
> +	bool add_component = false;
> +	int ret;
> +
> +	ret = initialize_hdcp_port_data(connector);
> +	if (ret) {
> +		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
> +		return;
> +	}
> +
> +	mutex_lock(&dev_priv->hdcp_comp_mutex);
> +	/*
> +	 * Component for mei is common across the connector.
> +	 * Adding the component once is sufficient.
> +	 */
> +	if (!dev_priv->hdcp_comp_added) {
> +		dev_priv->hdcp_comp_added = true;
> +		add_component = true;
> +	}
> +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> +
> +	if (add_component) {
> +		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);
> +			kfree(hdcp->port_data.streams);
> +			return;
> +		}
> +	}
>  
> -	/* TODO: MEI interface needs to be initialized here */
>  	hdcp->hdcp2_supported = true;
>  }
>  
> @@ -917,6 +1306,38 @@ int intel_hdcp_disable(struct intel_connector *connector)
>  	return ret;
>  }
>  
> +void intel_hdcp_cleanup(struct intel_connector *connector)
> +{
> +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> +
> +	if (!connector->hdcp.shim)
> +		return;
> +
> +	mutex_lock(&connector->hdcp.mutex);
> +	if (!connector->hdcp.hdcp2_supported) {
> +		mutex_unlock(&connector->hdcp.mutex);
> +		return;
> +	}
> +
> +	kfree(connector->hdcp.port_data.streams);
> +	mutex_lock(&dev_priv->hdcp_comp_mutex);
> +	/*
> +	 * Component for mei is common across the connector.
> +	 * Removing the component once is sufficient.
> +	 */
> +	if (!dev_priv->hdcp_comp_added) {
> +		mutex_unlock(&dev_priv->hdcp_comp_mutex);
> +		mutex_unlock(&connector->hdcp.mutex);
> +		return;
> +	}
> +
> +	dev_priv->hdcp_comp_added = false;
> +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> +	mutex_unlock(&connector->hdcp.mutex);
> +
> +	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
> +}
> +
>  void intel_hdcp_atomic_check(struct drm_connector *connector,
>  			     struct drm_connector_state *old_state,
>  			     struct drm_connector_state *new_state)
> diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
> index 72fbb037f9b3..f3851ba3e4c3 100644
> --- a/include/drm/i915_component.h
> +++ b/include/drm/i915_component.h
> @@ -24,10 +24,13 @@
>  #ifndef _I915_COMPONENT_H_
>  #define _I915_COMPONENT_H_
>  
> +#include <linux/device.h>
> +
>  #include "drm_audio_component.h"
>  
>  enum i915_component_type {
>  	I915_COMPONENT_AUDIO = 1,
> +	I915_COMPONENT_HDCP,
>  };
>  
>  /* MAX_PORT is the number of port
> -- 
> 2.7.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH v11 08/42] drm/i915: MEI interface definition

[Daniel Vetter]

On Thu, Feb 07, 2019 at 08:40:08PM +0100, Daniel Vetter wrote:
> On Thu, Feb 07, 2019 at 02:33:57AM +0530, Ramalingam C wrote:
> > 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]
> > 
> > Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> > ---
> >  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_drv.h       |   6 +
> >  drivers/gpu/drm/i915/intel_hdcp.c      | 423 ++++++++++++++++++++++++++++++++-
> >  include/drm/i915_component.h           |   3 +
> >  6 files changed, 441 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > index 7de90701f6f1..9c4218b5d153 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.c
> > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > @@ -904,6 +904,7 @@ 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 a2293152cb6a..e3d030b73b5b 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"
> > @@ -2043,6 +2044,12 @@ 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_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> > index 030d962697dd..b5c54c688256 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;
> > @@ -385,6 +386,9 @@ 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 {
> > @@ -405,6 +409,7 @@ 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 {
> > @@ -2070,6 +2075,7 @@ 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_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..79f8979b9150 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 +834,360 @@ 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);
> > +	struct drm_device *dev = &dev_priv->drm;
> > +	struct intel_connector *intel_connector;
> > +	struct drm_connector *connector;
> > +	struct drm_connector_list_iter conn_iter;
> > +
> > +	DRM_DEBUG("I915 HDCP comp unbind\n");
> > +
> > +	/* Once the component is unbind, Disable HDCP2.2 on all connectors */
> > +	drm_connector_list_iter_begin(dev, &conn_iter);
> > +	drm_for_each_connector_iter(connector, &conn_iter) {
> > +		intel_connector = to_intel_connector(connector);
> > +			intel_hdcp_disable(intel_connector);
> > +	}
> > +	drm_connector_list_iter_end(&conn_iter);
> 
> I played this through, and I think we have a bug here.
> 
> 1. Userspace asks for hdcp, sets connector_state->content_protection to
> DESIRED
> 2. hdcp is enabled, userspace visible value is now ENABLED
> 2. mei unloads
> 3. we disable content protection here
> 4. hdcp->value is set to UNDESIRED
> 5. intel_hdcp_prop_work does _not_ update
> connector_state->content_protection (this is correct, because otherwise
> dpms off/on would break and we would not try to restore)
> 6. Userspace still sees ENABLED, which is wrong
> 
> I think the better solution is to not call intel_hdcp_disable here at all,
> but instead wait for the link status check work to notice that ME is gone,
> which will the correctly change status from ENABLED to DESIRED.
> 
> So just the below code is needed I think
> 
> Otherwise looks good to me, with the ebove loop removed:
> 
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> 
> 
> > +
> > +	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 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))
> > @@ -843,9 +1199,42 @@ static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
> >  
> >  static void intel_hdcp2_init(struct intel_connector *connector)
> >  {
> > +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> >  	struct intel_hdcp *hdcp = &connector->hdcp;
> > +	bool add_component = false;
> > +	int ret;
> > +
> > +	ret = initialize_hdcp_port_data(connector);
> > +	if (ret) {
> > +		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
> > +		return;
> > +	}
> > +
> > +	mutex_lock(&dev_priv->hdcp_comp_mutex);
> > +	/*
> > +	 * Component for mei is common across the connector.
> > +	 * Adding the component once is sufficient.
> > +	 */
> > +	if (!dev_priv->hdcp_comp_added) {
> > +		dev_priv->hdcp_comp_added = true;
> > +		add_component = true;
> > +	}
> > +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> > +
> > +	if (add_component) {

This one (and the similar code in the destroy path) is a bit awkward for
two reasons:
- Because of dp mst hotplug/unplug you need a lock to make sure we
  register only once, usually setup & teardown code doesn't need any
  locking at all because it's all single-threaded.
- ->hdcp_comp_added boils down to "have we loaded i915".

I think it would be nice to have a separate intel_hdcp_mei_comp_init/fini,
which is called only once (from mode_config setup/teardown functions
perhaps) in the driver load/unload code, which would avoid both issues.

Because the code is already protected with the mutex against the mei hdcp
driver appearing/disappearing any time it wants to this will not cause an
additional problem. So would be nice to simplify.

Cheers, Daniel

> > +		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);
> > +			kfree(hdcp->port_data.streams);
> > +			return;
> > +		}
> > +	}
> >  
> > -	/* TODO: MEI interface needs to be initialized here */
> >  	hdcp->hdcp2_supported = true;
> >  }
> >  
> > @@ -917,6 +1306,38 @@ int intel_hdcp_disable(struct intel_connector *connector)
> >  	return ret;
> >  }
> >  
> > +void intel_hdcp_cleanup(struct intel_connector *connector)
> > +{
> > +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > +
> > +	if (!connector->hdcp.shim)
> > +		return;
> > +
> > +	mutex_lock(&connector->hdcp.mutex);
> > +	if (!connector->hdcp.hdcp2_supported) {
> > +		mutex_unlock(&connector->hdcp.mutex);
> > +		return;
> > +	}
> > +
> > +	kfree(connector->hdcp.port_data.streams);
> > +	mutex_lock(&dev_priv->hdcp_comp_mutex);
> > +	/*
> > +	 * Component for mei is common across the connector.
> > +	 * Removing the component once is sufficient.
> > +	 */
> > +	if (!dev_priv->hdcp_comp_added) {
> > +		mutex_unlock(&dev_priv->hdcp_comp_mutex);
> > +		mutex_unlock(&connector->hdcp.mutex);
> > +		return;
> > +	}
> > +
> > +	dev_priv->hdcp_comp_added = false;
> > +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
> > +	mutex_unlock(&connector->hdcp.mutex);
> > +
> > +	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
> > +}
> > +
> >  void intel_hdcp_atomic_check(struct drm_connector *connector,
> >  			     struct drm_connector_state *old_state,
> >  			     struct drm_connector_state *new_state)
> > diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
> > index 72fbb037f9b3..f3851ba3e4c3 100644
> > --- a/include/drm/i915_component.h
> > +++ b/include/drm/i915_component.h
> > @@ -24,10 +24,13 @@
> >  #ifndef _I915_COMPONENT_H_
> >  #define _I915_COMPONENT_H_
> >  
> > +#include <linux/device.h>
> > +
> >  #include "drm_audio_component.h"
> >  
> >  enum i915_component_type {
> >  	I915_COMPONENT_AUDIO = 1,
> > +	I915_COMPONENT_HDCP,
> >  };
> >  
> >  /* MAX_PORT is the number of port
> > -- 
> > 2.7.4
> > 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH v11 26/42] misc/mei/hdcp: Client driver for HDCP application

[Winkler, Tomas]

> 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>
> ---
>  drivers/misc/mei/Kconfig         |  7 +++++
>  drivers/misc/mei/Makefile        |  2 ++
>  drivers/misc/mei/hdcp/Makefile   |  7 +++++
>  drivers/misc/mei/hdcp/mei_hdcp.c | 65
> ++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 81 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..9c518b7f0011 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 SoCs.
This is not limited to SoC this goes for PCH based platforms as well. 


> 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..b8580b91e255
> --- /dev/null
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -0,0 +1,65 @@
> +// 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,
I would use space instead of tab here, it's not sable view between editors. 
> 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,
Would use spaces here too,  between structure member and assignment.

Otherwise looks good to me. Ack.
Thanks
Tomas


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Re: [PATCH v11 29/42] misc/mei/hdcp: Verify Receiver Cert and prepare km

[Winkler, Tomas]

> -----Original Message-----
> From: C, Ramalingam
> Sent: Wednesday, February 06, 2019 23:04
> To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org;
> daniel.vetter@ffwll.ch; Winkler, Tomas <tomas.winkler@intel.com>; Shankar,
> Uma <uma.shankar@intel.com>
> Cc: C, Ramalingam <ramalingam.c@intel.com>
> Subject: [PATCH v11 29/42] misc/mei/hdcp: Verify Receiver Cert and prepare
> km
> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@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 77dda13fcc88..4e471657c6f0 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -97,11 +97,92 @@ 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
> + * @hdcp_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;
Would keep km_stored u8 or use something like
*km_stored = !!verify_rxcert_out.km_stored;

Looks good to me otherwise. 

> +	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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Re: [PATCH v11 28/42] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

[Winkler, Tomas]

> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> ---
>  drivers/misc/mei/hdcp/mei_hdcp.c | 89
> ++++++++++++++++++++++++++++++++++++++++
>  drivers/misc/mei/hdcp/mei_hdcp.h | 23 +++++++++++
>  2 files changed, 112 insertions(+)
> 
> diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
> b/drivers/misc/mei/hdcp/mei_hdcp.c
> index b8580b91e255..77dda13fcc88 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -23,6 +23,95 @@
>  #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(short int port) {
> +	enum mei_i915_port i915_port = (enum mei_i915_port)port;
> +
> +	return (u8)(i915_port == PORT_A ? MEI_DDI_A : i915_port); }

This translations from enum port to short int, than to eum mei_i915_port  and then to u8 bothers me.
Should be a cleaner 
Maybe it's a bit overhead but it will be much more readlbe if we do switch statement here: 

 switch (port)
{
      case PORT_A: 
	return MEI_DDI_A:
      case PORT_B:
              return MEI_DDI_B
    etc. 
      case:         I915_MAX_PORTS
default: 
             MEI_DDI_INVALID_PORT 
}
Otherwise looks good to me. 

> +
> +/**
> + * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in
> +ME FW
> + * @dev: device corresponding to the mei_cl_device
> + * @hdcp_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..28686f2ae88c 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.h
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.h
> @@ -363,4 +363,27 @@ 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,
> +};
> +
> +enum mei_i915_port {
This is the same as enum port why not using that and keep them in sync. 
> +	PORT_NONE = -1,
> +
> +	PORT_A = 0,
> +	PORT_B,
> +	PORT_C,
> +	PORT_D,
> +	PORT_E,
> +	PORT_F,
> +	I915_MAX_PORTS,
> +};
>  #endif /* __MEI_HDCP_H__ */
> --
> 2.7.4

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Re: [PATCH v11 30/42] misc/mei/hdcp: Verify H_prime

[Winkler, Tomas]

> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Ack
Thanks
Tomas

> ---
>  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 4e471657c6f0..0bbc6992631a 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -177,13 +177,69 @@ 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
> + * @hdcp_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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Re: [PATCH v11 32/42] misc/mei/hdcp: Initiate Locality check

[Winkler, Tomas]

> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Ack
Thanks
Tomas

> ---
>  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 17043fc60d18..c540d03470a6 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -291,6 +291,61 @@ 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
> + * @hdcp_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,
> @@ -299,7 +354,7 @@ 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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Re: [PATCH v11 31/42] misc/mei/hdcp: Store the HDCP Pairing info

[Winkler, Tomas]

> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Ack
Thanks
Tomas

> ---
>  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 0bbc6992631a..17043fc60d18 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -233,6 +233,64 @@ 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
> + * @hdcp_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,
> @@ -240,7 +298,7 @@ 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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Re: [PATCH v11 33/42] misc/mei/hdcp: Verify L_prime

[Winkler, Tomas]

> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Ack
Thanks
Tomas

> ---
>  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 c540d03470a6..814d870347a0 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -346,6 +346,64 @@ mei_hdcp_initiate_locality_check(struct device *dev,
>  	return 0;
>  }
> 
> +/**
> + * mei_hdcp_verify_lprime() - Verify lprime.
> + * @dev: device corresponding to the mei_cl_device
> + * @hdcp_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,
> @@ -355,7 +413,7 @@ 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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RE: [PATCH v11 35/42] misc/mei/hdcp: Repeater topology verification and ack

[Winkler, Tomas]

> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Ack
Thanks
Tomas

> ---
>  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 d8665b02d6d5..a64578cec0c9 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -461,6 +461,80 @@ 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
> + * @hdcp_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,
> @@ -472,7 +546,8 @@ 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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RE: [PATCH v11 34/42] misc/mei/hdcp: Prepare Session Key

[Winkler, Tomas]

> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Ack
Thanks
Tomas

> ---
>  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 814d870347a0..d8665b02d6d5 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -404,6 +404,63 @@ 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
> + * @hdcp_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,
> @@ -414,7 +471,7 @@ 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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Re: [PATCH v11 37/42] misc/mei/hdcp: Enabling the HDCP authentication

[Winkler, Tomas]

> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Ack 
Thanks
Tomas

> ---
>  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 1ebfc4aa2f04..167ccfeeca9e 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -600,6 +600,59 @@ 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
> + * @hdcp_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,
> @@ -614,7 +667,7 @@ 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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RE: [PATCH v11 36/42] misc/mei/hdcp: Verify M_prime

[Winkler, Tomas]

> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Ack,
Thanks
Tomas

> ---
>  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 a64578cec0c9..1ebfc4aa2f04 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -535,6 +535,71 @@ 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
> + * @hdcp_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,
> @@ -548,7 +613,7 @@ 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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Re: [PATCH v11 38/42] misc/mei/hdcp: Closing wired HDCP2.2 Tx Session

[Winkler, Tomas]

> 
> 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]
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Ack
Thanks
Tomas

> ---
>  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 167ccfeeca9e..615eed149837 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -653,6 +653,59 @@ 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
> + * @hdcp_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,
> @@ -668,7 +721,7 @@ 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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RE: [PATCH v11 39/42] misc/mei/hdcp: Component framework for I915 Interface

[Winkler, Tomas]

> 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.
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  drivers/misc/mei/hdcp/mei_hdcp.c | 83
> +++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 81 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
> b/drivers/misc/mei/hdcp/mei_hdcp.c
> index 615eed149837..beba6fb4d2e2 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> @@ -706,8 +707,7 @@
> 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 =
> @@ -724,20 +724,99 @@ 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 comp_master_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 match_add_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);
> +		mei_cldev_set_drvdata(cldev, NULL);
Can be done in exit label.
> +		goto match_add_exit;
> +	}
> +
> +	return 0;
> +
> +match_add_exit:
> +	kfree(comp_master);
> +comp_master_exit:

You can use a single label as  kfree is NULL safe. 
> +	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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RE: [PATCH v11 28/42] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

[C, Ramalingam]

> -----Original Message-----
> From: Winkler, Tomas
> Sent: Friday, February 8, 2019 3:05 AM
> To: C, Ramalingam <ramalingam.c@intel.com>; intel-gfx@lists.freedesktop.org;
> dri-devel@lists.freedesktop.org; daniel.vetter@ffwll.ch; Shankar, Uma
> <uma.shankar@intel.com>
> Subject: RE: [PATCH v11 28/42] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx
> Session
> 
> > 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]
> >
> > Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> > Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> > ---
> >  drivers/misc/mei/hdcp/mei_hdcp.c | 89
> > ++++++++++++++++++++++++++++++++++++++++
> >  drivers/misc/mei/hdcp/mei_hdcp.h | 23 +++++++++++
> >  2 files changed, 112 insertions(+)
> >
> > diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
> > b/drivers/misc/mei/hdcp/mei_hdcp.c
> > index b8580b91e255..77dda13fcc88 100644
> > --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> > +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> > @@ -23,6 +23,95 @@
> >  #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(short int port) {
> > +	enum mei_i915_port i915_port = (enum mei_i915_port)port;
> > +
> > +	return (u8)(i915_port == PORT_A ? MEI_DDI_A : i915_port); }
> 
> This translations from enum port to short int, than to eum mei_i915_port  and
> then to u8 bothers me.
> Should be a cleaner
> Maybe it's a bit overhead but it will be much more readlbe if we do switch
> statement here:
> 
>  switch (port)
> {
>       case PORT_A:
> 	return MEI_DDI_A:
>       case PORT_B:
>               return MEI_DDI_B
>     etc.
>       case:         I915_MAX_PORTS
> default:
>              MEI_DDI_INVALID_PORT
> }
> Otherwise looks good to me.

Only one value differs by value that is PORTA. All other input and output values are same.
In this situation switch will be overkill. Let me know if you still insist.

-Ram
> 
> > +
> > +/**
> > + * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session
> > +in ME FW
> > + * @dev: device corresponding to the mei_cl_device
> > + * @hdcp_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..28686f2ae88c 100644
> > --- a/drivers/misc/mei/hdcp/mei_hdcp.h
> > +++ b/drivers/misc/mei/hdcp/mei_hdcp.h
> > @@ -363,4 +363,27 @@ 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,
> > +};
> > +
> > +enum mei_i915_port {
> This is the same as enum port why not using that and keep them in sync.
> > +	PORT_NONE = -1,
> > +
> > +	PORT_A = 0,
> > +	PORT_B,
> > +	PORT_C,
> > +	PORT_D,
> > +	PORT_E,
> > +	PORT_F,
> > +	I915_MAX_PORTS,
> > +};
> >  #endif /* __MEI_HDCP_H__ */
> > --
> > 2.7.4

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Re: [PATCH v11 39/42] misc/mei/hdcp: Component framework for I915 Interface

[C, Ramalingam]

> -----Original Message-----
> From: Winkler, Tomas
> Sent: Friday, February 8, 2019 3:42 AM
> To: C, Ramalingam <ramalingam.c@intel.com>; intel-gfx@lists.freedesktop.org;
> dri-devel@lists.freedesktop.org; daniel.vetter@ffwll.ch; Shankar, Uma
> <uma.shankar@intel.com>
> Subject: RE: [PATCH v11 39/42] misc/mei/hdcp: Component framework for I915
> Interface
> 
> > 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.
> >
> > Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> > Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> > ---
> >  drivers/misc/mei/hdcp/mei_hdcp.c | 83
> > +++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 81 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
> > b/drivers/misc/mei/hdcp/mei_hdcp.c
> > index 615eed149837..beba6fb4d2e2 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> @@ -706,8 +707,7 @@
> > 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 =
> > @@ -724,20 +724,99 @@ 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 comp_master_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 match_add_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);
> > +		mei_cldev_set_drvdata(cldev, NULL);
> Can be done in exit label.


I will move it.
> > +		goto match_add_exit;
> > +	}
> > +
> > +	return 0;
> > +
> > +match_add_exit:
> > +	kfree(comp_master);
> > +comp_master_exit:
> 
> You can use a single label as  kfree is NULL safe.
Sure.

-Ram
> > +	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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Re: [PATCH v11 08/42] drm/i915: MEI interface definition

[C, Ramalingam]

On 2/8/2019 1:18 AM, Daniel Vetter wrote:
> On Thu, Feb 07, 2019 at 08:40:08PM +0100, Daniel Vetter wrote:
>> On Thu, Feb 07, 2019 at 02:33:57AM +0530, Ramalingam C wrote:
>>> 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]
>>>
>>> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
>>> ---
>>>   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_drv.h       |   6 +
>>>   drivers/gpu/drm/i915/intel_hdcp.c      | 423 ++++++++++++++++++++++++++++++++-
>>>   include/drm/i915_component.h           |   3 +
>>>   6 files changed, 441 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
>>> index 7de90701f6f1..9c4218b5d153 100644
>>> --- a/drivers/gpu/drm/i915/i915_drv.c
>>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>>> @@ -904,6 +904,7 @@ 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 a2293152cb6a..e3d030b73b5b 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"
>>> @@ -2043,6 +2044,12 @@ 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_drv.h b/drivers/gpu/drm/i915/intel_drv.h
>>> index 030d962697dd..b5c54c688256 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;
>>> @@ -385,6 +386,9 @@ 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 {
>>> @@ -405,6 +409,7 @@ 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 {
>>> @@ -2070,6 +2075,7 @@ 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_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..79f8979b9150 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 +834,360 @@ 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);
>>> +	struct drm_device *dev = &dev_priv->drm;
>>> +	struct intel_connector *intel_connector;
>>> +	struct drm_connector *connector;
>>> +	struct drm_connector_list_iter conn_iter;
>>> +
>>> +	DRM_DEBUG("I915 HDCP comp unbind\n");
>>> +
>>> +	/* Once the component is unbind, Disable HDCP2.2 on all connectors */
>>> +	drm_connector_list_iter_begin(dev, &conn_iter);
>>> +	drm_for_each_connector_iter(connector, &conn_iter) {
>>> +		intel_connector = to_intel_connector(connector);
>>> +			intel_hdcp_disable(intel_connector);
>>> +	}
>>> +	drm_connector_list_iter_end(&conn_iter);
>> I played this through, and I think we have a bug here.
>>
>> 1. Userspace asks for hdcp, sets connector_state->content_protection to
>> DESIRED
>> 2. hdcp is enabled, userspace visible value is now ENABLED
>> 2. mei unloads
>> 3. we disable content protection here
>> 4. hdcp->value is set to UNDESIRED
>> 5. intel_hdcp_prop_work does _not_ update
>> connector_state->content_protection (this is correct, because otherwise
>> dpms off/on would break and we would not try to restore)
>> 6. Userspace still sees ENABLED, which is wrong
>>
>> I think the better solution is to not call intel_hdcp_disable here at all,
>> but instead wait for the link status check work to notice that ME is gone,
>> which will the correctly change status from ENABLED to DESIRED.
Daniel,

It is a embarrassing miss from my side.
But can be fixed using the __intel_hdcp(1/2)_disable and setting the 
hdcp->val to desired and invoking the prop_work.

Perhaps, as you mentioned we could leave it to the link integrity check 
also to do the same. But it will be need to kill it here.

-Ram
>>
>> So just the below code is needed I think
>>
>> Otherwise looks good to me, with the ebove loop removed:
>>
>> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
>>
>>
>>> +
>>> +	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 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))
>>> @@ -843,9 +1199,42 @@ static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
>>>   
>>>   static void intel_hdcp2_init(struct intel_connector *connector)
>>>   {
>>> +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>>>   	struct intel_hdcp *hdcp = &connector->hdcp;
>>> +	bool add_component = false;
>>> +	int ret;
>>> +
>>> +	ret = initialize_hdcp_port_data(connector);
>>> +	if (ret) {
>>> +		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
>>> +		return;
>>> +	}
>>> +
>>> +	mutex_lock(&dev_priv->hdcp_comp_mutex);
>>> +	/*
>>> +	 * Component for mei is common across the connector.
>>> +	 * Adding the component once is sufficient.
>>> +	 */
>>> +	if (!dev_priv->hdcp_comp_added) {
>>> +		dev_priv->hdcp_comp_added = true;
>>> +		add_component = true;
>>> +	}
>>> +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
>>> +
>>> +	if (add_component) {
> This one (and the similar code in the destroy path) is a bit awkward for
> two reasons:
> - Because of dp mst hotplug/unplug you need a lock to make sure we
>    register only once, usually setup & teardown code doesn't need any
>    locking at all because it's all single-threaded.
> - ->hdcp_comp_added boils down to "have we loaded i915".
Added because of the place we are adding the component . i.e 
connector_init which happens per connector. If we move this out of 
connector_init we dont need this flag.
>
> I think it would be nice to have a separate intel_hdcp_mei_comp_init/fini,
> which is called only once (from mode_config setup/teardown functions
> perhaps) in the driver load/unload code, which would avoid both issues.
Sure I will move it out.

Thanks
-Ram.
>
> Because the code is already protected with the mutex against the mei hdcp
> driver appearing/disappearing any time it wants to this will not cause an
> additional problem. So would be nice to simplify.
>
> Cheers, Daniel
>
>>> +		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);
>>> +			kfree(hdcp->port_data.streams);
>>> +			return;
>>> +		}
>>> +	}
>>>   
>>> -	/* TODO: MEI interface needs to be initialized here */
>>>   	hdcp->hdcp2_supported = true;
>>>   }
>>>   
>>> @@ -917,6 +1306,38 @@ int intel_hdcp_disable(struct intel_connector *connector)
>>>   	return ret;
>>>   }
>>>   
>>> +void intel_hdcp_cleanup(struct intel_connector *connector)
>>> +{
>>> +	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
>>> +
>>> +	if (!connector->hdcp.shim)
>>> +		return;
>>> +
>>> +	mutex_lock(&connector->hdcp.mutex);
>>> +	if (!connector->hdcp.hdcp2_supported) {
>>> +		mutex_unlock(&connector->hdcp.mutex);
>>> +		return;
>>> +	}
>>> +
>>> +	kfree(connector->hdcp.port_data.streams);
>>> +	mutex_lock(&dev_priv->hdcp_comp_mutex);
>>> +	/*
>>> +	 * Component for mei is common across the connector.
>>> +	 * Removing the component once is sufficient.
>>> +	 */
>>> +	if (!dev_priv->hdcp_comp_added) {
>>> +		mutex_unlock(&dev_priv->hdcp_comp_mutex);
>>> +		mutex_unlock(&connector->hdcp.mutex);
>>> +		return;
>>> +	}
>>> +
>>> +	dev_priv->hdcp_comp_added = false;
>>> +	mutex_unlock(&dev_priv->hdcp_comp_mutex);
>>> +	mutex_unlock(&connector->hdcp.mutex);
>>> +
>>> +	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
>>> +}
>>> +
>>>   void intel_hdcp_atomic_check(struct drm_connector *connector,
>>>   			     struct drm_connector_state *old_state,
>>>   			     struct drm_connector_state *new_state)
>>> diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
>>> index 72fbb037f9b3..f3851ba3e4c3 100644
>>> --- a/include/drm/i915_component.h
>>> +++ b/include/drm/i915_component.h
>>> @@ -24,10 +24,13 @@
>>>   #ifndef _I915_COMPONENT_H_
>>>   #define _I915_COMPONENT_H_
>>>   
>>> +#include <linux/device.h>
>>> +
>>>   #include "drm_audio_component.h"
>>>   
>>>   enum i915_component_type {
>>>   	I915_COMPONENT_AUDIO = 1,
>>> +	I915_COMPONENT_HDCP,
>>>   };
>>>   
>>>   /* MAX_PORT is the number of port
>>> -- 
>>> 2.7.4
>>>
>> -- 
>> Daniel Vetter
>> Software Engineer, Intel Corporation
>> http://blog.ffwll.ch

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