From 226f37530fa42670d911c65812210a3b5e56def2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Fri, 4 Feb 2022 19:10:53 +0200
Subject: drm/i915/selftests: Disable runtime pm wakeref tracking for the mock
 device
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Git-commit: 985a0256df3290d318bf937db7ef0633f7654490
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

commit c50df701d49e ("drm/i915: Enable rpm wakeref tracking
whether runtime pm is enabled or not") enabled wakeref tracking
even for the mock device. Turns out that has somewhat significant
overhead, and on the glacial Core m3's we have in CI the vma
selftests are now exceeding the allotted time budget.

So let's disable the wakeref tracking once again for the mock
device in order to avoid blowing up the selftest runtime.

Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Acked-by: Tomi Sarvela <tomi.p.sarvela@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220204171053.18409-1-ville.syrjala@linux.intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/intel_runtime_pm.c          | 3 +++
 drivers/gpu/drm/i915/intel_runtime_pm.h          | 1 +
 drivers/gpu/drm/i915/selftests/mock_gem_device.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 3293ac71bcf8..6ed5786bcd29 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -77,6 +77,9 @@ track_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm)
 	depot_stack_handle_t stack, *stacks;
 	unsigned long flags;
 
+	if (rpm->no_wakeref_tracking)
+		return -1;
+
 	stack = __save_depot_stack();
 	if (!stack)
 		return -1;
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.h b/drivers/gpu/drm/i915/intel_runtime_pm.h
index 47a85fab4130..d9160e3ff4af 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.h
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.h
@@ -51,6 +51,7 @@ struct intel_runtime_pm {
 	bool available;
 	bool suspended;
 	bool irqs_enabled;
+	bool no_wakeref_tracking;
 
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
 	/*
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 8aa7b1d33865..79e819334b4e 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -161,6 +161,8 @@ struct drm_i915_private *mock_gem_device(void)
 	i915_params_copy(&i915->params, &i915_modparams);
 
 	intel_runtime_pm_init_early(&i915->runtime_pm);
+	/* wakeref tracking has significant overhead */
+	i915->runtime_pm.no_wakeref_tracking = true;
 
 	/* Using the global GTT may ask questions about KMS users, so prepare */
 	drm_mode_config_init(&i915->drm);
-- 
2.38.1