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.
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
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
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
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
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
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
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
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
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
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
Acked-by: Daniel Vetter
Reviewed-by: Uma Shankar
Reviewed-by: Tomas Winkler
---
drivers/gpu/drm/i915/intel_hdcp.c | 118
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
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
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
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
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
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
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
---
drivers/misc/mei/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/misc/mei/Kconfig
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
For the reusability of the enum port in other driver modules
(like mei_hdcp), enum port definition is moved from I915 local header
intel_display.h to drm/i915_drm.h
Signed-off-by: Ramalingam C
Acked-by: Daniel Vetter
---
drivers/gpu/drm/i915/intel_display.h | 16 +---
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
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
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
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
---
drivers/misc/mei/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/misc/mei/Kconfig
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
From: Tomas Winkler
Export to_mei_cl_device macro, it is needed also in mei client drivers.
Signed-off-by: Tomas Winkler
Signed-off-by: Ramalingam C
---
drivers/misc/mei/bus.c | 1 -
include/linux/mei_cl_bus.h | 2 ++
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git
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
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
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
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.
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
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
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
Since DP ERRATA message is not defined at spec, those structure
definition is removed from drm_hdcp.h
Signed-off-by: Ramalingam C
Suggested-by: Daniel Vetter
Reviewed-by: Daniel Vetter
Reviewed-by: Uma Shankar
---
include/drm/drm_hdcp.h | 6 --
1 file changed, 6 deletions(-)
diff --git
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
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
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
"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
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
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
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
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:
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
From: Tomas Winkler
Whitelist HDCP client for in kernel drm use
v2:
Rebased.
Signed-off-by: Tomas Winkler
Signed-off-by: Ramalingam C
---
drivers/misc/mei/bus-fixup.c | 16
1 file changed, 16 insertions(+)
diff --git a/drivers/misc/mei/bus-fixup.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
Reviewed-by: Daniel Vetter
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
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
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.
"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
Time period for HDCP2.2 link check.
Signed-off-by: Ramalingam C
Reviewed-by: Daniel Vetter
Reviewed-by: Uma Shankar
---
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
---
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
Since DP ERRATA message is not defined at spec, those structure
definition is removed from drm_hdcp.h
Signed-off-by: Ramalingam C
Suggested-by: Daniel Vetter
Reviewed-by: Daniel Vetter
Reviewed-by: Uma Shankar
---
include/drm/drm_hdcp.h | 6 --
1 file changed, 6 deletions(-)
diff --git
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
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
Acked-by: Daniel Vetter
Reviewed-by: Uma Shankar
Reviewed-by: Tomas Winkler
---
drivers/gpu/drm/i915/intel_hdcp.c | 118
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
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
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
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
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
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 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
---
drivers/misc/mei/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/misc/mei/Kconfig
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
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
Header has used the references to struct device without it definition
or declaration. Hence resulting in compilation warning such as
"'struct device' declared inside parameter list..."
This changes adds a declaration to struct device in the header to avoid
any such warnings.
Signed-off-by:
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
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
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
Time period for HDCP2.2 link check.
Signed-off-by: Ramalingam C
Reviewed-by: Daniel Vetter
Reviewed-by: Uma Shankar
---
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
---
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
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
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
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
From: Tomas Winkler
Export to_mei_cl_device macro, it is needed also in mei client drivers.
Signed-off-by: Tomas Winkler
Signed-off-by: Ramalingam C
---
drivers/misc/mei/bus.c | 1 -
include/linux/mei_cl_bus.h | 2 ++
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git
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
From: Tomas Winkler
Whitelist HDCP client for in kernel drm use
v2:
Rebased.
Signed-off-by: Tomas Winkler
Signed-off-by: Ramalingam C
---
drivers/misc/mei/bus-fixup.c | 16
1 file changed, 16 insertions(+)
diff --git a/drivers/misc/mei/bus-fixup.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
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.
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
Since DP ERRATA message is not defined at spec, those structure
definition is removed from drm_hdcp.h
Signed-off-by: Ramalingam C
Suggested-by: Daniel Vetter
Reviewed-by: Daniel Vetter
Reviewed-by: Uma Shankar
---
include/drm/drm_hdcp.h | 6 --
1 file changed, 6 deletions(-)
diff --git
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
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.
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
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
"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
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
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
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
Acked-by: Daniel Vetter
Reviewed-by: Uma Shankar
Reviewed-by: Tomas Winkler
---
drivers/gpu/drm/i915/intel_hdcp.c | 118
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
Header has used the references to struct device without it definition
or declaration.
Hence the warning of "struct device declared inside parameter list..."
This changes adds a declaration to struct device in the header to avoid
any such warnings.
Signed-off-by: Ramalingam C
---
Header has used the references to struct device without it definition
or declaration. Hence resulting in compilation warning such as
"'struct device' declared inside parameter list..."
This changes adds a declaration to struct device in the header to avoid
any such warnings.
Signed-off-by:
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
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
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
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
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
Time period for HDCP2.2 link check.
Signed-off-by: Ramalingam C
Reviewed-by: Daniel Vetter
Reviewed-by: Uma Shankar
---
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
---
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
From: Tomas Winkler
Export to_mei_cl_device macro, it is needed also in mei client drivers.
Signed-off-by: Tomas Winkler
Signed-off-by: Ramalingam C
---
drivers/misc/mei/bus.c | 1 -
include/linux/mei_cl_bus.h | 2 ++
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git
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
From: Tomas Winkler
Whitelist HDCP client for in kernel drm use
v2:
Rebased.
Signed-off-by: Tomas Winkler
Signed-off-by: Ramalingam C
---
drivers/misc/mei/bus-fixup.c | 16
1 file changed, 16 insertions(+)
diff --git a/drivers/misc/mei/bus-fixup.c
1 - 100 of 105 matches
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