2016-11-16 Daniel Vetter <daniel@xxxxxxxx>:
> On Tue, Nov 15, 2016 at 11:37:08PM +0900, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> >
> > Create one timeline context for each CRTC to be able to handle out-fences
> > and signal them. It adds a few members to struct drm_crtc: fence_context,
> > where we store the context we get from fence_context_alloc(), the
> > fence seqno and the fence lock, that we pass in fence_init() to be
> > used by the fence.
> >
> > v2: Comment by Daniel Stone:
> > - add BUG_ON() to fence_to_crtc() macro
> >
> > v3: Comment by Ville Syrjälä
> > - Use more meaningful name as crtc timeline name
> >
> > v4: Comments by Brian Starkey
> > - Use even more meaninful name for the crtc timeline
> > - add doc for timeline_name
> > Comment by Daniel Vetter
> > - use in-line style for comments
> >
> > - rebase after fence -> dma_fence rename
> >
> > v5: Comment by Daniel Vetter
> > - Add doc for drm_crtc_fence_ops
> >
> > v6: Comment by Chris Wilson
> > - Move fence_to_crtc to drm_crtc.c
> > - Move export of drm_crtc_fence_ops to drm_crtc_internal.h
> >
> > - rebase against latest drm-misc
> >
> > Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> > Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> (v5)
> > Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx> (v5)
> > Tested-by: Robert Foss <robert.foss@xxxxxxxxxxxxx> (v5)
> > ---
> > drivers/gpu/drm/drm_crtc.c | 38 +++++++++++++++++++++++++++++++++++++
> > drivers/gpu/drm/drm_crtc_internal.h | 2 ++
> > include/drm/drm_crtc.h | 29 ++++++++++++++++++++++++++++
> > 3 files changed, 69 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> > index c19ecc2..02e9451 100644
> > --- a/drivers/gpu/drm/drm_crtc.c
> > +++ b/drivers/gpu/drm/drm_crtc.c
> > @@ -33,6 +33,7 @@
> > #include <linux/list.h>
> > #include <linux/slab.h>
> > #include <linux/export.h>
> > +#include <linux/dma-fence.h>
> > #include <drm/drmP.h>
> > #include <drm/drm_crtc.h>
> > #include <drm/drm_edid.h>
> > @@ -163,6 +164,38 @@ static void drm_crtc_crc_fini(struct drm_crtc *crtc)
> > #endif
> > }
> >
> > +static 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);
> > +}
> > +
> > +static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
> > +{
> > + struct drm_crtc *crtc = fence_to_crtc(fence);
> > +
> > + return crtc->dev->driver->name;
> > +}
> > +
> > +static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
> > +{
> > + struct drm_crtc *crtc = fence_to_crtc(fence);
> > +
> > + return crtc->timeline_name;
> > +}
> > +
> > +static bool drm_crtc_fence_enable_signaling(struct dma_fence *fence)
> > +{
> > + return true;
> > +}
> > +
> > +const struct dma_fence_ops drm_crtc_fence_ops = {
> > + .get_driver_name = drm_crtc_fence_get_driver_name,
> > + .get_timeline_name = drm_crtc_fence_get_timeline_name,
> > + .enable_signaling = drm_crtc_fence_enable_signaling,
> > + .wait = dma_fence_default_wait,
> > +};
> > +
> > /**
> > * drm_crtc_init_with_planes - Initialise a new CRTC object with
> > * specified primary and cursor planes.
> > @@ -220,6 +253,11 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
> > return -ENOMEM;
> > }
> >
> > + crtc->fence_context = dma_fence_context_alloc(1);
> > + spin_lock_init(&crtc->fence_lock);
> > + snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
> > + "CRTC:%d-%s", crtc->base.id, crtc->name);
> > +
> > crtc->base.properties = &crtc->properties;
> >
> > list_add_tail(&crtc->head, &config->crtc_list);
> > diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
> > index 64bb3eb..036b972 100644
> > --- a/drivers/gpu/drm/drm_crtc_internal.h
> > +++ b/drivers/gpu/drm/drm_crtc_internal.h
> > @@ -43,6 +43,8 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
> >
> > void drm_fb_release(struct drm_file *file_priv);
> >
> > +extern const struct dma_fence_ops drm_crtc_fence_ops;
>
> Do we still needs this after you've moved the cast helper?
Yes, because we use drm_crtc_fence_ops to create fences in drm_atomic.c
Gustavo
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