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drm/amd/display: add mod hdcp interface for supporting encryption state query

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Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Reviewed-by: George Shen <George.Shen@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2021-03-11 13:14:25 -05:00 committed by Alex Deucher
parent 4fe1fdcc23
commit 45f673e615
7 changed files with 54 additions and 29 deletions
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6
drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c
View File

@ -314,6 +314,9 @@ enum mod_hdcp_status mod_hdcp_add_display(struct mod_hdcp *hdcp,
goto out;
}
/* save current encryption states to restore after next authentication */
mod_hdcp_save_current_encryption_states(hdcp);
/* reset existing authentication status */
status = reset_authentication(hdcp, output);
if (status != MOD_HDCP_STATUS_SUCCESS)
@ -360,6 +363,9 @@ enum mod_hdcp_status mod_hdcp_remove_display(struct mod_hdcp *hdcp,
goto out;
}
/* save current encryption states to restore after next authentication */
mod_hdcp_save_current_encryption_states(hdcp);
/* stop current authentication */
status = reset_authentication(hdcp, output);
if (status != MOD_HDCP_STATUS_SUCCESS)

4
drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h
View File

@ -331,6 +331,8 @@ enum mod_hdcp_status mod_hdcp_add_display_to_topology(
struct mod_hdcp *hdcp, struct mod_hdcp_display *display);
enum mod_hdcp_status mod_hdcp_remove_display_from_topology(
struct mod_hdcp *hdcp, uint8_t index);
bool mod_hdcp_is_link_encryption_enabled(struct mod_hdcp *hdcp);
void mod_hdcp_save_current_encryption_states(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp1_create_session(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp1_destroy_session(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp1_validate_rx(struct mod_hdcp *hdcp);
@ -339,8 +341,6 @@ enum mod_hdcp_status mod_hdcp_hdcp1_validate_ksvlist_vp(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp1_enable_dp_stream_encryption(
struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp1_link_maintenance(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp1_get_link_encryption_status(struct mod_hdcp *hdcp,
enum mod_hdcp_encryption_status *encryption_status);
enum mod_hdcp_status mod_hdcp_hdcp2_create_session(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp2_destroy_session(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_hdcp2_prepare_ake_init(struct mod_hdcp *hdcp);

37
drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
View File

@ -256,10 +256,12 @@ static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
goto out;
}
if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_link_maintenance,
mod_hdcp_execute_and_set(mod_hdcp_hdcp1_link_maintenance,
&input->link_maintenance, &status,
hdcp, "link_maintenance"))
goto out;
hdcp, "link_maintenance");
if (status != MOD_HDCP_STATUS_SUCCESS)
mod_hdcp_save_current_encryption_states(hdcp);
out:
return status;
}
@ -425,19 +427,24 @@ static enum mod_hdcp_status authenticated_dp(struct mod_hdcp *hdcp,
event_ctx->unexpected_event = 1;
goto out;
}
if (!mod_hdcp_is_link_encryption_enabled(hdcp))
goto out;
if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
&input->bstatus_read, &status,
hdcp, "bstatus_read"))
goto out;
if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
&input->link_integrity_check, &status,
hdcp, "link_integrity_check"))
goto out;
if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
&input->reauth_request_check, &status,
hdcp, "reauth_request_check"))
goto out;
if (status == MOD_HDCP_STATUS_SUCCESS)
mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
&input->bstatus_read, &status,
hdcp, "bstatus_read");
if (status == MOD_HDCP_STATUS_SUCCESS)
mod_hdcp_execute_and_set(check_link_integrity_dp,
&input->link_integrity_check, &status,
hdcp, "link_integrity_check");
if (status == MOD_HDCP_STATUS_SUCCESS)
mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
&input->reauth_request_check, &status,
hdcp, "reauth_request_check");
if (status != MOD_HDCP_STATUS_SUCCESS)
mod_hdcp_save_current_encryption_states(hdcp);
out:
return status;
}

6
drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c
View File

@ -93,7 +93,7 @@ enum mod_hdcp_status mod_hdcp_hdcp1_transition(struct mod_hdcp *hdcp,
}
break;
case H1_A45_AUTHENTICATED:
if (input->link_maintenance != PASS) {
if (input->link_maintenance == FAIL) {
/* 1A-07: consider invalid ri' a failure */
/* 1A-07a: consider read ri' not returned a failure */
fail_and_restart_in_ms(0, &status, output);
@ -243,8 +243,8 @@ enum mod_hdcp_status mod_hdcp_hdcp1_dp_transition(struct mod_hdcp *hdcp,
}
break;
case D1_A4_AUTHENTICATED:
if (input->link_integrity_check != PASS ||
input->reauth_request_check != PASS) {
if (input->link_integrity_check == FAIL ||
input->reauth_request_check == FAIL) {
/* 1A-07: restart hdcp on a link integrity failure */
fail_and_restart_in_ms(0, &status, output);
break;

10
drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
View File

@ -564,11 +564,13 @@ static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
event_ctx->unexpected_event = 1;
goto out;
}
if (!mod_hdcp_is_link_encryption_enabled(hdcp))
goto out;
if (!process_rxstatus(hdcp, event_ctx, input, &status))
goto out;
if (event_ctx->rx_id_list_ready)
goto out;
process_rxstatus(hdcp, event_ctx, input, &status);
if (status != MOD_HDCP_STATUS_SUCCESS)
mod_hdcp_save_current_encryption_states(hdcp);
out:
return status;
}

10
drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
View File

@ -245,8 +245,8 @@ enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct mod_hdcp *hdcp,
HDCP_FULL_DDC_TRACE(hdcp);
break;
case H2_A5_AUTHENTICATED:
if (input->rxstatus_read != PASS ||
input->reauth_request_check != PASS) {
if (input->rxstatus_read == FAIL ||
input->reauth_request_check == FAIL) {
fail_and_restart_in_ms(0, &status, output);
break;
} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
@ -562,11 +562,11 @@ enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct mod_hdcp *hdcp,
HDCP_FULL_DDC_TRACE(hdcp);
break;
case D2_A5_AUTHENTICATED:
if (input->rxstatus_read != PASS ||
input->reauth_request_check != PASS) {
if (input->rxstatus_read == FAIL ||
input->reauth_request_check == FAIL) {
fail_and_restart_in_ms(0, &status, output);
break;
} else if (input->link_integrity_check_dp != PASS) {
} else if (input->link_integrity_check_dp == FAIL) {
if (hdcp->connection.hdcp2_retry_count >= 1)
adjust->hdcp2.force_type = MOD_HDCP_FORCE_TYPE_0;
fail_and_restart_in_ms(0, &status, output);

10
drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
View File

@ -914,3 +914,13 @@ enum mod_hdcp_status mod_hdcp_hdcp2_validate_stream_ready(struct mod_hdcp *hdcp)
return status;
}
bool mod_hdcp_is_link_encryption_enabled(struct mod_hdcp *hdcp)
{
/* unsupported */
return true;
}
void mod_hdcp_save_current_encryption_states(struct mod_hdcp *hdcp)
{
/* unsupported */
}