[PATCH 07/21] drm/amd/display: add mod hdcp interface for supporting encryption state query
Anson Jacob
Anson.Jacob at amd.com
Fri Mar 26 22:05:20 UTC 2021
From: Wenjing Liu <wenjing.liu at amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu at amd.com>
Reviewed-by: George Shen <George.Shen at amd.com>
Acked-by: Anson Jacob <Anson.Jacob at amd.com>
---
.../gpu/drm/amd/display/modules/hdcp/hdcp.c | 6 +++
.../gpu/drm/amd/display/modules/hdcp/hdcp.h | 4 +-
.../display/modules/hdcp/hdcp1_execution.c | 37 +++++++++++--------
.../display/modules/hdcp/hdcp1_transition.c | 6 +--
.../display/modules/hdcp/hdcp2_execution.c | 10 +++--
.../display/modules/hdcp/hdcp2_transition.c | 10 ++---
.../drm/amd/display/modules/hdcp/hdcp_psp.c | 10 +++++
7 files changed, 54 insertions(+), 29 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c
index e7b841d960e7..68a6481d7f8f 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c
@@ -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)
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h
index 5c22cf7e6118..3ce91db560d1 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h
@@ -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);
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
index 73ca49f05bd3..eeac14300a2a 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
@@ -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_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"))
+ if (!mod_hdcp_is_link_encryption_enabled(hdcp))
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;
}
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c
index 24ab95b093f7..3dda8c1d83fc 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c
@@ -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;
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
index a0895a7efda2..f164f6a5d4dc 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
@@ -564,11 +564,13 @@ static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
event_ctx->unexpected_event = 1;
goto out;
}
-
- if (!process_rxstatus(hdcp, event_ctx, input, &status))
- goto out;
- if (event_ctx->rx_id_list_ready)
+ if (!mod_hdcp_is_link_encryption_enabled(hdcp))
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;
}
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
index e738c7ae66ec..b0306ed6d6b4 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
@@ -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);
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
index 904ce9b88088..9d7ca316dc3f 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
@@ -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 */
+}
--
2.25.1
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