[PATCH 12/50] drm/i915/fb: Track rpm wakerefs

[Chris Wilson]

Keep track of the rpm wakeref used for framebuffer access so that we can
cancel upon release and so more clearly identify leaks.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula at intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 5 +++--
 drivers/gpu/drm/i915/intel_fbdev.c   | 9 +++++----
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0c1f93d34b7a..1cc2d9640727 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2023,6 +2023,7 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
 	struct drm_device *dev = fb->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	intel_wakeref_t wakeref;
 	struct i915_vma *vma;
 	unsigned int pinctl;
 	u32 alignment;
@@ -2046,7 +2047,7 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
 	 * intel_runtime_pm_put(), so it is correct to wrap only the
 	 * pin/unpin/fence and not more.
 	 */
-	intel_runtime_pm_get(dev_priv);
+	wakeref = intel_runtime_pm_get(dev_priv);
 
 	atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
 
@@ -2101,7 +2102,7 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
 err:
 	atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
 
-	intel_runtime_pm_put_unchecked(dev_priv);
+	intel_runtime_pm_put(dev_priv, wakeref);
 	return vma;
 }
 
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index 215e5894842d..3036d835bc2b 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -177,8 +177,9 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	const struct i915_ggtt_view view = {
 		.type = I915_GGTT_VIEW_NORMAL,
 	};
-	struct fb_info *info;
 	struct drm_framebuffer *fb;
+	intel_wakeref_t wakeref;
+	struct fb_info *info;
 	struct i915_vma *vma;
 	unsigned long flags = 0;
 	bool prealloc = false;
@@ -209,7 +210,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	}
 
 	mutex_lock(&dev->struct_mutex);
-	intel_runtime_pm_get(dev_priv);
+	wakeref = intel_runtime_pm_get(dev_priv);
 
 	/* Pin the GGTT vma for our access via info->screen_base.
 	 * This also validates that any existing fb inherited from the
@@ -276,7 +277,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	ifbdev->vma = vma;
 	ifbdev->vma_flags = flags;
 
-	intel_runtime_pm_put_unchecked(dev_priv);
+	intel_runtime_pm_put(dev_priv, wakeref);
 	mutex_unlock(&dev->struct_mutex);
 	vga_switcheroo_client_fb_set(pdev, info);
 	return 0;
@@ -284,7 +285,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
 out_unpin:
 	intel_unpin_fb_vma(vma, flags);
 out_unlock:
-	intel_runtime_pm_put_unchecked(dev_priv);
+	intel_runtime_pm_put(dev_priv, wakeref);
 	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
-- 
2.20.1