From a944744ba517256fcc9311e12c083563cbbe7c88 Mon Sep 17 00:00:00 2001 From: Nikola Cornij Date: Fri, 27 Apr 2018 17:26:25 -0400 Subject: [PATCH] drm/amd/display: Clear underflow status for debug purposes We want to keep underflow sticky bit on for the longevity tests outside of test environment. For debug purposes it is, however, useful to clear underflow status after the test that caused it so that the following tests are not affected. This change fullfils both requirements by clearing the underflow only from within Windows or Diags test environment. Signed-off-by: Nikola Cornij Reviewed-by: Nikola Cornij Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index c452972bf1c3..f8e0576af6e0 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -326,6 +326,12 @@ void dcn10_log_hw_state(struct dc *dc) s.h_total, s.v_total, s.underflow_occurred_status); + + // Clear underflow for debug purposes + // We want to keep underflow sticky bit on for the longevity tests outside of test environment. + // This function is called only from Windows or Diags test environment, hence it's safe to clear + // it from here without affecting the original intent. + tg->funcs->clear_optc_underflow(tg); } DTN_INFO("\n"); -- 2.30.2