From: Michael Strauss <michael.stra...@amd.com>
[WHY]
Some monitors trigger HDCP2.x timeout after reinitializing (e.g. toggling HDR)
by taking longer than expected to return h' (h prime)
Previously the 200ms watchdog timer retry count would hit
MAX_NUM_OF_ATTEMPTS (4), causing fallback to HDCP1.x
[HOW]
Adding a 1s delay after an h' watchdog timeout provides enough time
for affected monitors to return h' in time without hitting MAX_NUM_OF_ATTEMPTS
Signed-off-by: Michael Strauss <michael.stra...@amd.com>
Reviewed-by: Wenjing Liu <wenjing....@amd.com>
---
.../gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
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 e8043c903a84..da190739a969 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
@@ -114,7 +114,7 @@ enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct
mod_hdcp *hdcp,
if (event_ctx->event ==
MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
/* 1A-11-3: consider h' timeout a failure */
- fail_and_restart_in_ms(0, &status, output);
+ fail_and_restart_in_ms(1000, &status, output);
} else {
/* continue h' polling */
callback_in_ms(100, output);
@@ -166,7 +166,7 @@ enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct
mod_hdcp *hdcp,
if (event_ctx->event ==
MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
/* 1A-11-2: consider h' timeout a failure */
- fail_and_restart_in_ms(0, &status, output);
+ fail_and_restart_in_ms(1000, &status, output);
} else {
/* continue h' polling */
callback_in_ms(20, output);
@@ -439,7 +439,7 @@ enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct
mod_hdcp *hdcp,
if (event_ctx->event ==
MOD_HDCP_EVENT_WATCHDOG_TIMEOUT)
/* 1A-10-3: consider h' timeout a failure */
- fail_and_restart_in_ms(0, &status, output);
+ fail_and_restart_in_ms(1000, &status, output);
else
increment_stay_counter(hdcp);
break;
@@ -484,7 +484,7 @@ enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct
mod_hdcp *hdcp,
if (event_ctx->event ==
MOD_HDCP_EVENT_WATCHDOG_TIMEOUT)
/* 1A-10-2: consider h' timeout a failure */
- fail_and_restart_in_ms(0, &status, output);
+ fail_and_restart_in_ms(1000, &status, output);
else
increment_stay_counter(hdcp);
break;
--
2.17.1
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