linux-kernel - [PATCH] drm/radeon/dp_auxch: Ratelimit aux transfer debug messages

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Date:   Wed, 22 Feb 2017 16:34:53 -0500
From:   Lyude <lyude@...hat.com>
To:     xorg-driver-ati@...ts.x.org
Cc:     Lyude <lyude@...hat.com>, Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/radeon/dp_auxch: Ratelimit aux transfer debug messages

Aux transfers always fail with non-zero status flags when there's
nothing connected on the port, so we don't usually need to see all of
the debugging information from it. Also, we try reprobing a -lot-, so
without ratelimiting most of the kernel log is filled up with messages
from radeon_dp_aux_transfer_native.

Signed-off-by: Lyude <lyude@...hat.com>
---
 drivers/gpu/drm/radeon/radeon_dp_auxch.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_dp_auxch.c b/drivers/gpu/drm/radeon/radeon_dp_auxch.c
index 474a8a18..12eac4e 100644
--- a/drivers/gpu/drm/radeon/radeon_dp_auxch.c
+++ b/drivers/gpu/drm/radeon/radeon_dp_auxch.c
@@ -168,7 +168,8 @@ radeon_dp_aux_transfer_native(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg
 		goto done;
 	}
 	if (tmp & AUX_RX_ERROR_FLAGS) {
-		DRM_DEBUG_KMS("dp_aux_ch flags not zero: %08x\n", tmp);
+		DRM_DEBUG_KMS_RATELIMITED("dp_aux_ch flags not zero: %08x\n",
+					  tmp);
 		ret = -EIO;
 		goto done;
 	}
-- 
2.9.3