2016-11-15 Chris Wilson <chris at chris-wilson.co.uk>:
> On Tue, Nov 15, 2016 at 10:57:35AM +0900, Gustavo Padovan wrote:
> > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> > index 11780a9..0870de1 100644
> > --- a/include/drm/drm_crtc.h
> > +++ b/include/drm/drm_crtc.h
> > @@ -32,6 +32,8 @@
> > #include <linux/fb.h>
> > #include <linux/hdmi.h>
> > #include <linux/media-bus-format.h>
> > +#include <linux/srcu.h>
> > +#include <linux/dma-fence.h>
> > #include <uapi/drm/drm_mode.h>
> > #include <uapi/drm/drm_fourcc.h>
> > #include <drm/drm_modeset_lock.h>
> > @@ -739,9 +741,52 @@ struct drm_crtc {
> > */
> > struct drm_crtc_crc crc;
> > #endif
> > +
> > + /**
> > + * @fence_context:
> > + *
> > + * timeline context used for fence operations.
> > + */
> > + unsigned int fence_context;
> > +
> > + /**
> > + * @fence_lock:
> > + *
> > + * spinlock to protect the fences in the fence_context.
> > + */
> > +
> > + spinlock_t fence_lock;
> > + /**
> > + * @fence_seqno:
> > + *
> > + * Seqno variable used as monotonic counter for the fences
> > + * created on the CRTC's timeline.
> > + */
> > + unsigned long fence_seqno;
> > +
> > + /**
> > + * @timeline_name:
> > + *
> > + * The name of the CRTC's fence timeline.
> > + */
> > + char timeline_name[32];
> > };
> >
> > /**
> > + * dma_crtc_fence_ops - fence ops for the drm_crtc timeline
> > + *
> > + * It contains the dma_fence_ops that should be called by the dma_fence
> > + * code. CRTC core should use this ops when initializing fences.
> > + */
> > +extern const struct dma_fence_ops drm_crtc_fence_ops;
> > +
> > +static inline struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
> > +{
> > + BUG_ON(fence->ops != &drm_crtc_fence_ops);
> > + return container_of(fence->lock, struct drm_crtc, fence_lock);
> > +}
>
> If you are planning to export this for use by drivers, you are missing
> the EXPORT_SYMBOL(drm_crtc_fence_ops).
Drivers should not be using this, at least for now.
Gustavo
