On Wed, Aug 10, 2016 at 12:46:23PM +0200, Maarten Lankhorst wrote:
> When doing a atomic commit affecting multiple crtc's, multiple events
> are generated. The user_data member does not allow you to distinguish,
> because they all have the same pointer.
>
> I've chosen to use crtc_id, because using pipe would create ambiguity
> when pipe = 0. A test for != 0 is easier to implement, and crtc_id
> will never be 0.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Daniel Stone <daniels@xxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_irq.c | 2 ++
> include/uapi/drm/drm.h | 2 +-
> 2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
> index 97c70642dbe1..f01bb0eea31c 100644
> --- a/drivers/gpu/drm/drm_irq.c
> +++ b/drivers/gpu/drm/drm_irq.c
> @@ -1021,6 +1021,7 @@ void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
>
> e->pipe = pipe;
> e->event.sequence = drm_vblank_count(dev, pipe);
> + e->event.crtc_id = crtc->base.id;
> list_add_tail(&e->base.link, &dev->vblank_event_list);
> }
> EXPORT_SYMBOL(drm_crtc_arm_vblank_event);
> @@ -1048,6 +1049,7 @@ void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
> now = get_drm_timestamp();
> }
> e->pipe = pipe;
> + e->event.crtc_id = crtc->base.id;
> send_vblank_event(dev, e, seq, &now);
> }
> EXPORT_SYMBOL(drm_crtc_send_vblank_event);
> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
> index 452675fb55d9..dced4d4517d6 100644
> --- a/include/uapi/drm/drm.h
> +++ b/include/uapi/drm/drm.h
> @@ -850,7 +850,7 @@ struct drm_event_vblank {
> __u32 tv_sec;
> __u32 tv_usec;
> __u32 sequence;
> - __u32 reserved;
> + __u32 crtc_id; /* 0 on older kernels that do not support this */
Same comment as in reply to Michel's patch: Is there really no existing
userspace which would fail to compile now because we renamed this? Simply
creating a new drm_event_vblank2 struct would fix that.
-Daniel
> };
>
> /* typedef area */
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
