From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Fri, 4 Feb 2022 17:10:53 +0000 (+0200)
Subject: drm/i915/selftests: Disable runtime pm wakeref tracking for the mock device
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=985a0256df3290d318bf937db7ef0633f7654490;p=linux.git

drm/i915/selftests: Disable runtime pm wakeref tracking for the mock device

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
---

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 3293ac71bcf86..6ed5786bcd299 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 47a85fab41307..d9160e3ff4afc 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 8aa7b1d338659..79e819334b4ee 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);