diff mbox series

[v12,24/38] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

Message ID 1549696387-28268-25-git-send-email-ramalingam.c@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: Implement HDCP2.2 | expand

Commit Message

Ramalingam C Feb. 9, 2019, 7:12 a.m. UTC 
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>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 89 ++++++++++++++++++++++++++++++++++++++++
 drivers/misc/mei/hdcp/mei_hdcp.h | 23 +++++++++++
 2 files changed, 112 insertions(+)

Comments

Winkler, Tomas Feb. 9, 2019, 4:09 p.m. UTC | #1 
> 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>
> Acked-by: Tomas Winkler <tomas.winkler@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 8df069c1b0cc..56d3ac1e6831 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); }
> +
Still the same code I haven't Acked that patch.
Thanks
Tomas


> +/**
> + * 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
Ramalingam C Feb. 10, 2019, 8:18 a.m. UTC | #2 
On 2/9/2019 9:39 PM, Winkler, Tomas wrote:
>> 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>
>> Acked-by: Tomas Winkler <tomas.winkler@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 8df069c1b0cc..56d3ac1e6831 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); }
>> +
> Still the same code I haven't Acked that patch.
Sorry. I will remove the ack part.

I prefer this approach as it is not so complicated stuff here. still if 
you insist I will use switch case.

Thanks
--Ram

> Thanks
> Tomas
>
>
>> +/**
>> + * 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
Winkler, Tomas Feb. 10, 2019, 8:25 a.m. UTC | #3 
> 
> On 2/9/2019 9:39 PM, Winkler, Tomas wrote:
> >> 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>
> >> Acked-by: Tomas Winkler <tomas.winkler@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 8df069c1b0cc..56d3ac1e6831 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); }
> >> +
> > Still the same code I haven't Acked that patch.
> Sorry. I will remove the ack part.
> 
> I prefer this approach as it is not so complicated stuff here. still if you insist I
> will use switch case.
Yes, I believe that the translation should be understood. 
This function should returns 
   MEI_DDI_XXX only (it could be u8)
It's by accident  that MEI_DDI_B equals PORT_B etc. 
Please also remove dual enum i915_port and eum port  as well. 
Thanks
Tomas

> 
> Thanks
> --Ram
> 
> > Thanks
> > Tomas
> >
> >
> >> +/**
> >> + * 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
Ramalingam C Feb. 10, 2019, 9:02 a.m. UTC | #4 
On 2/10/2019 1:55 PM, Winkler, Tomas wrote:
>> On 2/9/2019 9:39 PM, Winkler, Tomas wrote:
>>>> 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>
>>>> Acked-by: Tomas Winkler <tomas.winkler@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 8df069c1b0cc..56d3ac1e6831 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); }
>>>> +
>>> Still the same code I haven't Acked that patch.
>> Sorry. I will remove the ack part.
>>
>> I prefer this approach as it is not so complicated stuff here. still if you insist I
>> will use switch case.
> Yes, I believe that the translation should be understood.
> This function should returns
>     MEI_DDI_XXX only (it could be u8)
> It's by accident  that MEI_DDI_B equals PORT_B etc.
> Please also remove dual enum i915_port and eum port  as well.
this will do?
static inline u8 mei_get_ddi_index(short int port)
{
          switch (port) {
          case PORT_A:
                  return (u8)MEI_DDI_A;
          case PORT_B:
                  return (u8)MEI_DDI_B;
          case PORT_C:
                  return (u8)MEI_DDI_C;
          case PORT_D:
                  return (u8)MEI_DDI_D;
          case PORT_E:
                  return (u8)MEI_DDI_E;
          case PORT_F:
                  return (u8)MEI_DDI_F;
          default:
                  return (u8)MEI_DDI_INVALID_PORT;
          }
  }


-Ram

> Thanks
> Tomas
>
>> Thanks
>> --Ram
>>
>>> Thanks
>>> Tomas
>>>
>>>
>>>> +/**
>>>> + * 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
Winkler, Tomas Feb. 10, 2019, 7:58 p.m. UTC | #5 
> 
> 
> 
> On 2/10/2019 1:55 PM, Winkler, Tomas wrote:
> >> On 2/9/2019 9:39 PM, Winkler, Tomas wrote:
> >>>> 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>
> >>>> Acked-by: Tomas Winkler <tomas.winkler@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 8df069c1b0cc..56d3ac1e6831 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); }
> >>>> +
> >>> Still the same code I haven't Acked that patch.
> >> Sorry. I will remove the ack part.
> >>
> >> I prefer this approach as it is not so complicated stuff here. still
> >> if you insist I will use switch case.
> > Yes, I believe that the translation should be understood.
> > This function should returns
> >     MEI_DDI_XXX only (it could be u8)
> > It's by accident  that MEI_DDI_B equals PORT_B etc.
> > Please also remove dual enum i915_port and eum port  as well.
> this will do?
> static inline u8 mei_get_ddi_index(short int port) {
>           switch (port) {
>           case PORT_A:
>                   return (u8)MEI_DDI_A;
>           case PORT_B:
>                   return (u8)MEI_DDI_B;
>           case PORT_C:
>                   return (u8)MEI_DDI_C;
>           case PORT_D:
>                   return (u8)MEI_DDI_D;
>           case PORT_E:
>                   return (u8)MEI_DDI_E;
>           case PORT_F:
>                   return (u8)MEI_DDI_F;
>           default:
>                   return (u8)MEI_DDI_INVALID_PORT;	
>           }
>   }
You can drop (u8)
> 
+       switch (port) {
+       case PORT_A:
+               return MEI_DDI_A;
+       case PORT_B:
+               return MEI_DDI_B;
+       case PORT_C:
+               return MEI_DDI_C;
+       case PORT_D:
+               return MEI_DDI_D;
+       case PORT_E:
+               return MEI_DDI_E;
+       case PORT_F:
+               return MEI_DDI_F;
+       default:
+               return MEI_DDI_INVALID_PORT;
> 
> -Ram
> 
> > Thanks
> > Tomas
> >
> >> Thanks
> >> --Ram
> >>
> >>> Thanks
> >>> Tomas
> >>>
> >>>
> >>>> +/**
> >>>> + * 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 doesn't belong to here, this is defined twice and it's i915 not  HDCP FW enum
> >>>> +	PORT_NONE = -1,
Please note that you are using a negative value here why you are casting it to u16, maybe 0xFFFFFF will be better. 
> >>>> +
> >>>> +	PORT_A = 0,
> >>>> +	PORT_B,
> >>>> +	PORT_C,
> >>>> +	PORT_D,
> >>>> +	PORT_E,
> >>>> +	PORT_F,
> >>>> +	I915_MAX_PORTS,
> >>>> +};

This should be put from drivers/gpu/drm/i915/intel_display.h
Into include/drm/intel_<someheader>.h 
Together with the port_name() macro 

> >>>>    #endif /* __MEI_HDCP_H__ */
> >>>> --
> >>>> 2.7.4
diff mbox series

Patch

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 8df069c1b0cc..56d3ac1e6831 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__ */