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 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx