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drm/i915: Make fb_tracking.lock a spinlock

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We only need a very lightweight mechanism here as the locking is only
used for co-ordinating a bitfield.

v2: Move the cheap unlikely tests into the caller
v3: Move the kerneldoc into the header (now separated out into
intel_fronbuffer.h for better kerneldoc and readability)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtien <joonas.lahtinen@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1470324762-2545-20-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2016-08-04 16:32:36 +01:00
parent 5d723d7afd
commit b5add9591c
4 changed files with 71 additions and 56 deletions
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50
drivers/gpu/drm/i915/intel_frontbuffer.h
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@@ -28,15 +28,57 @@ struct drm_device;
struct drm_i915_private;
struct drm_i915_gem_object;
void intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
enum fb_op_origin origin);
void intel_frontbuffer_flip_prepare(struct drm_device *dev,
unsigned frontbuffer_bits);
void intel_frontbuffer_flip_complete(struct drm_device *dev,
unsigned frontbuffer_bits);
void intel_frontbuffer_flip(struct drm_device *dev,
unsigned frontbuffer_bits);
void intel_fb_obj_flush(struct drm_i915_gem_object *obj, bool retire,
enum fb_op_origin origin);
void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
enum fb_op_origin origin);
void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
bool retire,
enum fb_op_origin origin);
/**
* intel_fb_obj_invalidate - invalidate frontbuffer object
* @obj: GEM object to invalidate
* @origin: which operation caused the invalidation
*
* This function gets called every time rendering on the given object starts and
* frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
* be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
* until the rendering completes or a flip on this frontbuffer plane is
* scheduled.
*/
static inline void intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
enum fb_op_origin origin)
{
if (!obj->frontbuffer_bits)
return;
__intel_fb_obj_invalidate(obj, origin);
}
/**
* intel_fb_obj_flush - flush frontbuffer object
* @obj: GEM object to flush
* @retire: set when retiring asynchronous rendering
* @origin: which operation caused the flush
*
* This function gets called every time rendering on the given object has
* completed and frontbuffer caching can be started again. If @retire is true
* then any delayed flushes will be unblocked.
*/
static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
bool retire,
enum fb_op_origin origin)
{
if (!obj->frontbuffer_bits)
return;
__intel_fb_obj_flush(obj, retire, origin);
}
#endif /* __INTEL_FRONTBUFFER_H__ */