From 8b45b38531ba8116a45bb303dc0d62c22564805b Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 9 Feb 2020 13:19:16 +0000
Subject: drm/i915/execlists: Ignore tracek for nop process_csb
Git-commit: 7d7569ac3336b3b91a3700295c2af5610cb01d67
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
Recording the frequent inspection of CSB head/tail when there is
expected to be no update adds noise to the debug trace. (Not entirely
useless, but since we know the sequence of function calls, we can
surmise the function was called -- so redundant.)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200209131922.180287-2-chris@chris-wilson.co.uk
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 078dcf304215..d17913d15314 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2247,7 +2247,6 @@ static void process_csb(struct intel_engine_cs *engine)
*/
head = execlists->csb_head;
tail = READ_ONCE(*execlists->csb_write);
- ENGINE_TRACE(engine, "cs-irq head=%d, tail=%d\n", head, tail);
if (unlikely(head == tail))
return;
@@ -2261,6 +2260,7 @@ static void process_csb(struct intel_engine_cs *engine)
*/
rmb();
+ ENGINE_TRACE(engine, "cs-irq head=%d, tail=%d\n", head, tail);
do {
bool promote;
--
2.28.0