diff options
author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-06-21 09:16:54 +0100 |
---|---|---|
committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-06-21 09:36:33 +0100 |
commit | 43cee314345ac9e34e744f8c335150a17ff9a6fb (patch) | |
tree | 62f0ddd113a9463c31997dd0f1cd09cf82ea7365 /drivers/gpu | |
parent | d626f34573551479f62b09d4df09efc4af88136d (diff) | |
download | op-kernel-dev-43cee314345ac9e34e744f8c335150a17ff9a6fb.zip op-kernel-dev-43cee314345ac9e34e744f8c335150a17ff9a6fb.tar.gz |
drm/i915/fbdev: Limit the global async-domain synchronization
During cleanup we have to synchronise with the async task we are using
to initialise and register our fbdev. Currently, we are using a full
synchronisation on the global domain, but we can restrict this to just
synchronising up to our task if we remember our cookie.
Whilst there, streamline the function parameters.
v2: async_synchronize_cookie() takes an exclusive upper bound, to
synchronize with our task we have to pass in the next cookie.
v3: Drop premature disregarding of the active cookie (we need to wait
until the task is complete before continuing in the teardown).
v4: Refactor waiting on async to incorporate a comment explaining why we
need the +1.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466497015-8509-2-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu')
-rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/intel_fbdev.c | 39 |
2 files changed, 27 insertions, 13 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 9257f08..06fa25d 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -159,6 +159,7 @@ struct intel_framebuffer { struct intel_fbdev { struct drm_fb_helper helper; struct intel_framebuffer *fb; + async_cookie_t cookie; int preferred_bpp; }; diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index 4babefc..45a03d8 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -538,8 +538,7 @@ static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { .fb_probe = intelfb_create, }; -static void intel_fbdev_destroy(struct drm_device *dev, - struct intel_fbdev *ifbdev) +static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) { /* We rely on the object-free to release the VMA pinning for * the info->screen_base mmaping. Leaking the VMA is simpler than @@ -552,12 +551,14 @@ static void intel_fbdev_destroy(struct drm_device *dev, drm_fb_helper_fini(&ifbdev->helper); if (ifbdev->fb) { - mutex_lock(&dev->struct_mutex); + mutex_lock(&ifbdev->helper.dev->struct_mutex); intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0)); - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&ifbdev->helper.dev->struct_mutex); drm_framebuffer_remove(&ifbdev->fb->base); } + + kfree(ifbdev); } /* @@ -732,32 +733,44 @@ int intel_fbdev_init(struct drm_device *dev) static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) { - struct drm_i915_private *dev_priv = data; - struct intel_fbdev *ifbdev = dev_priv->fbdev; + struct intel_fbdev *ifbdev = data; /* Due to peculiar init order wrt to hpd handling this is separate. */ if (drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp)) - intel_fbdev_fini(dev_priv->dev); + intel_fbdev_fini(ifbdev->helper.dev); } void intel_fbdev_initial_config_async(struct drm_device *dev) { - async_schedule(intel_fbdev_initial_config, to_i915(dev)); + struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; + + ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); +} + +static void intel_fbdev_sync(struct intel_fbdev *ifbdev) +{ + if (!ifbdev->cookie) + return; + + /* Only serialises with all preceding async calls, hence +1 */ + async_synchronize_cookie(ifbdev->cookie + 1); + ifbdev->cookie = 0; } void intel_fbdev_fini(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - if (!dev_priv->fbdev) + struct intel_fbdev *ifbdev = dev_priv->fbdev; + + if (!ifbdev) return; flush_work(&dev_priv->fbdev_suspend_work); - if (!current_is_async()) - async_synchronize_full(); - intel_fbdev_destroy(dev, dev_priv->fbdev); - kfree(dev_priv->fbdev); + intel_fbdev_sync(ifbdev); + + intel_fbdev_destroy(ifbdev); dev_priv->fbdev = NULL; } |