Re: [PATCH v12 1/6] drm/i915: mei_hdcp: I915 sends ddi index as per ME FW

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On 2019-08-28 at 23:23:42 +0530, Winkler, Tomas wrote:
> > FW
> > 
> > I915 converts it's port value into ddi index defiend by ME FW and pass it as a
> > member of hdcp_port_data structure.
> > 
> > Hence expose the enum mei_fw_ddi to I915 through i915_mei_interface.h.
> > 
> > v2:
> >   Copyright years are bumped [Tomas]
> > 
> > Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> > Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> > Reviewed-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
> > Acked-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
> > ---
> >  drivers/gpu/drm/i915/display/intel_hdcp.c | 17 +++++++++++-
> >  drivers/misc/mei/hdcp/mei_hdcp.c          | 34 ++++++++---------------
> >  drivers/misc/mei/hdcp/mei_hdcp.h          | 12 --------
> >  include/drm/i915_mei_hdcp_interface.h     | 18 ++++++++++--
> >  4 files changed, 42 insertions(+), 39 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > index 6ec5ceeab601..e8b04cc8fcb1 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -1,9 +1,11 @@
> >  /* SPDX-License-Identifier: MIT */
> >  /*
> >   * Copyright (C) 2017 Google, Inc.
> > + * Copyright _ 2017-2019, Intel Corporation.
> 
> Something happened here with (C) ?
In few I915 files I am seeing this format of copyright too. If this is not
right I could add (C) too.

-Ram
> 
> >   *
> >   * Authors:
> >   * Sean Paul <seanpaul@xxxxxxxxxxxx>
> > + * Ramalingam C <ramalingam.c@xxxxxxxxx>
> >   */
> > 
> >  #include <linux/component.h>
> > @@ -1749,13 +1751,26 @@ static const struct component_ops
> > i915_hdcp_component_ops = {
> >  	.unbind = i915_hdcp_component_unbind,
> >  };
> > 
> > +static inline
> > +enum mei_fw_ddi intel_get_mei_fw_ddi_index(enum port port) {
> > +	switch (port) {
> > +	case PORT_A:
> > +		return MEI_DDI_A;
> > +	case PORT_B ... PORT_F:
> > +		return (enum mei_fw_ddi)port;
> > +	default:
> > +		return MEI_DDI_INVALID_PORT;
> > +	}
> > +}
> > +
> >  static inline int initialize_hdcp_port_data(struct intel_connector *connector,
> >  					    const struct intel_hdcp_shim *shim)
> > {
> >  	struct intel_hdcp *hdcp = &connector->hdcp;
> >  	struct hdcp_port_data *data = &hdcp->port_data;
> > 
> > -	data->port = connector->encoder->port;
> > +	data->fw_ddi = intel_get_mei_fw_ddi_index(connector->encoder-
> > >port);
> >  	data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
> >  	data->protocol = (u8)shim->protocol;
> > 
> > diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
> > b/drivers/misc/mei/hdcp/mei_hdcp.c
> > index c681f6fab342..3638c77eba26 100644
> > --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> > +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> > @@ -27,18 +27,6 @@
> > 
> >  #include "mei_hdcp.h"
> > 
> > -static inline u8 mei_get_ddi_index(enum port port) -{
> > -	switch (port) {
> > -	case PORT_A:
> > -		return MEI_DDI_A;
> > -	case PORT_B ... PORT_F:
> > -		return (u8)port;
> > -	default:
> > -		return MEI_DDI_INVALID_PORT;
> > -	}
> > -}
> > -
> >  /**
> >   * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
> >   * @dev: device corresponding to the mei_cl_device @@ -69,7 +57,7 @@
> > mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
> > 
> > 	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.port.physical_port = (u8)data->fw_ddi;
> >  	session_init_in.protocol = data->protocol;
> > 
> >  	byte = mei_cldev_send(cldev, (u8 *)&session_init_in, @@ -138,7
> > +126,7 @@ mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev,
> > 
> > 	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.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	verify_rxcert_in.cert_rx = rx_cert->cert_rx;
> >  	memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN);
> > @@ -208,7 +196,7 @@ mei_hdcp_verify_hprime(struct device *dev, struct
> > hdcp_port_data *data,
> >  	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);
> > +	send_hprime_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,
> >  	       HDCP_2_2_H_PRIME_LEN);
> > @@ -265,7 +253,7 @@ mei_hdcp_store_pairing_info(struct device *dev, struct
> > hdcp_port_data *data,
> > 
> > 	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);
> > +	pairing_info_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
> >  	       HDCP_2_2_E_KH_KM_LEN);
> > @@ -323,7 +311,7 @@ mei_hdcp_initiate_locality_check(struct device *dev,
> >  	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);
> > +	lc_init_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in));
> >  	if (byte < 0) {
> > @@ -378,7 +366,7 @@ mei_hdcp_verify_lprime(struct device *dev, struct
> > hdcp_port_data *data,
> > 
> > 	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);
> > +	verify_lprime_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime,
> >  	       HDCP_2_2_L_PRIME_LEN);
> > @@ -435,7 +423,7 @@ static int mei_hdcp_get_session_key(struct device
> > *dev,
> >  	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);
> > +	get_skey_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
> >  	if (byte < 0) {
> > @@ -499,7 +487,7 @@ mei_hdcp_repeater_check_flow_prepare_ack(struct
> > device *dev,
> > 
> > 	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);
> > +	verify_repeater_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	memcpy(verify_repeater_in.rx_info, rep_topology->rx_info,
> >  	       HDCP_2_2_RXINFO_LEN);
> > @@ -569,7 +557,7 @@ static int mei_hdcp_verify_mprime(struct device *dev,
> > 
> > 	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);
> > +	verify_mprime_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	memcpy(verify_mprime_in.m_prime, stream_ready->m_prime,
> >  	       HDCP_2_2_MPRIME_LEN);
> > @@ -630,7 +618,7 @@ static int mei_hdcp_enable_authentication(struct
> > device *dev,
> >  	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.port.physical_port = (u8)data->fw_ddi;
> >  	enable_auth_in.stream_type = data->streams[0].stream_type;
> > 
> >  	byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in, @@ -684,7
> > +672,7 @@ mei_hdcp_close_session(struct device *dev, struct hdcp_port_data
> > *data)
> >  				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);
> > +	session_close_in.port.physical_port = (u8)data->fw_ddi;
> > 
> >  	byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
> >  			      sizeof(session_close_in));
> > diff --git a/drivers/misc/mei/hdcp/mei_hdcp.h
> > b/drivers/misc/mei/hdcp/mei_hdcp.h
> > index e4b1cd54c853..e60282eb2d48 100644
> > --- a/drivers/misc/mei/hdcp/mei_hdcp.h
> > +++ b/drivers/misc/mei/hdcp/mei_hdcp.h
> > @@ -362,16 +362,4 @@ struct wired_cmd_repeater_auth_stream_req_out {
> >  	struct hdcp_cmd_header	header;
> >  	struct hdcp_port_id	port;
> >  } __packed;
> > -
> > -enum mei_fw_ddi {
> > -	MEI_DDI_INVALID_PORT = 0x0,
> > -
> > -	MEI_DDI_B = 1,
> > -	MEI_DDI_C,
> > -	MEI_DDI_D,
> > -	MEI_DDI_E,
> > -	MEI_DDI_F,
> > -	MEI_DDI_A = 7,
> > -	MEI_DDI_RANGE_END = MEI_DDI_A,
> > -};
> >  #endif /* __MEI_HDCP_H__ */
> > diff --git a/include/drm/i915_mei_hdcp_interface.h
> > b/include/drm/i915_mei_hdcp_interface.h
> > index 8c344255146a..08670aa650d4 100644
> > --- a/include/drm/i915_mei_hdcp_interface.h
> > +++ b/include/drm/i915_mei_hdcp_interface.h
> > @@ -1,6 +1,6 @@
> >  /* SPDX-License-Identifier: (GPL-2.0+) */
> >  /*
> > - * Copyright © 2017-2018 Intel Corporation
> > + * Copyright © 2017-2019 Intel Corporation
> >   *
> >   * Authors:
> >   * Ramalingam C <ramalingam.c@xxxxxxxxx> @@ -42,9 +42,21 @@ enum
> > hdcp_wired_protocol {
> >  	HDCP_PROTOCOL_DP
> >  };
> > 
> > +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,
> > +};
> > +
> >  /**
> >   * struct hdcp_port_data - intel specific HDCP port data
> > - * @port: port index as per I915
> > + * @fw_ddi: ddi index as per ME FW
> >   * @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 @@ -
> > 56,7 +68,7 @@ enum hdcp_wired_protocol {
> >   *	     streams
> >   */
> >  struct hdcp_port_data {
> > -	enum port port;
> > +	enum mei_fw_ddi fw_ddi;
> >  	u8 port_type;
> >  	u8 protocol;
> >  	u16 k;
> > --
> > 2.20.1
> 
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