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Commit 4da7b6d7 authored by Ajay Singh Parmar's avatar Ajay Singh Parmar Committed by Sandeep Panda
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msm: mdss: hdmi: add dynamic encryption enable support 



Implement qseecomm API to send command to TZ to enable/disable
encryption based on hdcp status. Enable encryption when hdcp
part 1 is successful and disable it when cable is disconnected
or authentication fails.

Change-Id: Ia5e1a5927dad36abc3093b16638879be823c84df
Signed-off-by: default avatarAjay Singh Parmar <aparmar@codeaurora.org>
parent 9c22a285

drivers/misc/hdcp.c

+46 −0
Original line number Diff line number Diff line
@@ -64,6 +64,7 @@ 
#define REPEATER_AUTH_STREAM_MANAGE_MESSAGE_ID 16

#define REPEATER_AUTH_STREAM_READY_MESSAGE_ID  17

#define HDCP1_SET_KEY_MESSAGE_ID       202

#define HDCP1_SET_ENC_MESSAGE_ID       205



#define BITS_8_IN_BYTES       1

#define BITS_16_IN_BYTES      2
@@ -316,6 +317,16 @@ struct __attribute__ ((__packed__)) repeater_info_struct { 
	uint32_t ReceiverIDListLen;

};



struct __attribute__ ((__packed__)) hdcp1_set_enc_req {

	uint32_t commandid;

	uint32_t enable;

};



struct __attribute__ ((__packed__)) hdcp1_set_enc_rsp {

	uint32_t commandid;

	uint32_t ret;

};



/*

 * struct hdcp_lib_handle - handle for hdcp client

 * @qseecom_handle - for sending commands to qseecom
@@ -1362,6 +1373,41 @@ int hdcp1_set_keys(uint32_t *aksv_msb, uint32_t *aksv_lsb) 
	return 0;

}



int hdcp1_set_enc(bool enable)

{

	int rc = 0;

	struct hdcp1_set_enc_req *set_enc_req;

	struct hdcp1_set_enc_rsp *set_enc_rsp;



	if (!hdcp1_supported || !hdcp1_handle)

		return -EINVAL;



	/* set keys and request aksv */

	set_enc_req = (struct hdcp1_set_enc_req *)hdcp1_handle->sbuf;

	set_enc_req->commandid = HDCP1_SET_ENC_MESSAGE_ID;

	set_enc_req->enable = enable;

	set_enc_rsp = (struct hdcp1_set_enc_rsp *)(hdcp1_handle->sbuf +

			QSEECOM_ALIGN(sizeof(struct hdcp1_set_enc_req)));

	rc = qseecom_send_command(hdcp1_handle,

		set_enc_req, QSEECOM_ALIGN(sizeof(struct hdcp1_set_enc_req)),

		set_enc_rsp, QSEECOM_ALIGN(sizeof(struct hdcp1_set_enc_rsp)));



	if (rc < 0) {

		pr_err("qseecom cmd failed err=%d\n", rc);

		return -EINVAL;

	}



	rc = set_enc_rsp->ret;

	if (rc) {

		pr_err("enc cmd failed, rsp=%d\n",

			set_enc_rsp->ret);

		return -EINVAL;

	}



	pr_debug("success\n");

	return 0;

}



int hdcp_library_register(struct hdcp_register_data *data)

{

	int rc = 0;

drivers/video/msm/mdss/mdss_hdmi_tx.c

+8 −0
Original line number Diff line number Diff line
@@ -1318,8 +1318,16 @@ static void hdmi_tx_hdcp_cb_work(struct work_struct *work) 
			rc = hdmi_tx_config_avmute(hdmi_ctrl, false);

			hdmi_tx_set_audio_switch_node(hdmi_ctrl, 1);

		}



		if (hdmi_ctrl->hdcp1_use_sw_keys && hdmi_ctrl->hdcp14_present)

			hdcp1_set_enc(true);

		break;

	case HDCP_STATE_AUTH_FAIL:

		if (hdmi_ctrl->hdcp1_use_sw_keys && hdmi_ctrl->hdcp14_present) {

			if (hdmi_ctrl->auth_state)

				hdcp1_set_enc(false);

		}



		hdmi_ctrl->auth_state = false;



		if (hdmi_tx_is_encryption_set(hdmi_ctrl) ||

include/linux/hdcp_qseecom.h

+1 −0
Original line number Diff line number Diff line
@@ -117,5 +117,6 @@ int hdcp_library_register(struct hdcp_register_data *data); 
void hdcp_library_deregister(void *phdcpcontext);

bool hdcp1_check_if_supported_load_app(void);

int hdcp1_set_keys(uint32_t *aksv_msb, uint32_t *aksv_lsb);

int hdcp1_set_enc(bool enable);



#endif /* __HDCP_QSEECOM_H */