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From fe08223921db486e3639e0d57c91a660c3d8dad3 Mon Sep 17 00:00:00 2001
From: Nikola Cornij <nikola.cornij@amd.com>
Date: Fri, 27 Apr 2018 17:26:25 -0400
Subject: [PATCH 4475/5725] 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 <nikola.cornij@amd.com>
Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
---
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 400d0ca..c40993a 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");
--
2.7.4
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