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drm/i915: FBC doesn't need struct_mutex anymore

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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: Chris wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2015-07-02 19:25:13 -03:00 committed by Daniel Vetter
parent b5e4b84d9f
commit c80ac8548d
3 changed files with 3 additions and 17 deletions
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4
drivers/gpu/drm/i915/i915_debugfs.c
View file

@ -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;
}

14
drivers/gpu/drm/i915/intel_display.c
View file

@ -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();

2
drivers/gpu/drm/i915/intel_fbc.c
View file

@ -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);
}