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Commit c80ac854 authored by Paulo Zanoni's avatar Paulo Zanoni Committed by Daniel Vetter
Browse files

drm/i915: FBC doesn't need struct_mutex anymore 



Everything is covered either by fbc.lock or mm.stolen_lock, and
intel_fbc.c is already responsible for grabbing the appropriate locks
when it needs them.

Reviewed-by: default avatarChris wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent b5e4b84d

drivers/gpu/drm/i915/i915_debugfs.c

+0 −4
Original line number Diff line number Diff line
@@ -1660,9 +1660,7 @@ static int i915_fbc_fc_get(void *data, u64 *val) 
	if (INTEL_INFO(dev)->gen < 7 || !HAS_FBC(dev))

		return -ENODEV;



	drm_modeset_lock_all(dev);

	*val = dev_priv->fbc.false_color;

	drm_modeset_unlock_all(dev);



	return 0;

}
@@ -1676,7 +1674,6 @@ static int i915_fbc_fc_set(void *data, u64 val) 
	if (INTEL_INFO(dev)->gen < 7 || !HAS_FBC(dev))

		return -ENODEV;



	drm_modeset_lock_all(dev);

	mutex_lock(&dev_priv->fbc.lock);



	reg = I915_READ(ILK_DPFC_CONTROL);
@@ -1687,7 +1684,6 @@ static int i915_fbc_fc_set(void *data, u64 val) 
		   (reg & ~FBC_CTL_FALSE_COLOR));



	mutex_unlock(&dev_priv->fbc.lock);

	drm_modeset_unlock_all(dev);

	return 0;

}

drivers/gpu/drm/i915/intel_display.c

+3 −11
Original line number Diff line number Diff line
@@ -4747,11 +4747,8 @@ static void intel_post_plane_update(struct intel_crtc *crtc) 
	if (crtc->atomic.update_wm_post)

		intel_update_watermarks(&crtc->base);



	if (atomic->update_fbc) {

		mutex_lock(&dev->struct_mutex);

	if (atomic->update_fbc)

		intel_fbc_update(dev);

		mutex_unlock(&dev->struct_mutex);

	}



	if (atomic->post_enable_primary)

		intel_post_enable_primary(&crtc->base);
@@ -4783,11 +4780,8 @@ static void intel_pre_plane_update(struct intel_crtc *crtc) 
	if (atomic->wait_for_flips)

		intel_crtc_wait_for_pending_flips(&crtc->base);



	if (atomic->disable_fbc) {

		mutex_lock(&dev->struct_mutex);

	if (atomic->disable_fbc)

		intel_fbc_disable_crtc(crtc);

		mutex_unlock(&dev->struct_mutex);

	}



	if (crtc->atomic.disable_ips)

		hsw_disable_ips(crtc);
@@ -11473,9 +11467,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, 


	i915_gem_track_fb(intel_fb_obj(work->old_fb), obj,

			  to_intel_plane(primary)->frontbuffer_bit);

	mutex_unlock(&dev->struct_mutex);



	intel_fbc_disable(dev);

	mutex_unlock(&dev->struct_mutex);

	intel_frontbuffer_flip_prepare(dev,

				       to_intel_plane(primary)->frontbuffer_bit);
@@ -15605,9 +15599,7 @@ void intel_modeset_cleanup(struct drm_device *dev) 


	intel_unregister_dsm_handler();



	mutex_lock(&dev->struct_mutex);

	intel_fbc_disable(dev);

	mutex_unlock(&dev->struct_mutex);



	/* flush any delayed tasks or pending work */

	flush_scheduled_work();

drivers/gpu/drm/i915/intel_fbc.c

+0 −2
Original line number Diff line number Diff line
@@ -335,7 +335,6 @@ static void intel_fbc_work_fn(struct work_struct *__work) 
	struct drm_device *dev = work->crtc->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;



	mutex_lock(&dev->struct_mutex);

	mutex_lock(&dev_priv->fbc.lock);

	if (work == dev_priv->fbc.fbc_work) {

		/* Double check that we haven't switched fb without cancelling
@@ -352,7 +351,6 @@ static void intel_fbc_work_fn(struct work_struct *__work) 
		dev_priv->fbc.fbc_work = NULL;

	}

	mutex_unlock(&dev_priv->fbc.lock);

	mutex_unlock(&dev->struct_mutex);



	kfree(work);

}