Hi Andrey,
On Tuesday 17 Jan 2017 04:03:11 Grodzovsky, Andrey wrote:
> On Monday, January 16, 2017 5:18 PM Laurent Pinchart wrote:
> > On Monday 16 Jan 2017 10:44:55 Andrey Grodzovsky wrote:
> > > Allows using atomic flip helpers for drivers using ASYNC flip.
> > > Remove ASYNC_FLIP restriction in helpers and caches the page flip
> > > flags in drm_plane_state to be used in the low level drivers.
> > >
> >> Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>
> >> ---
> >>
> >> drivers/gpu/drm/drm_atomic_helper.c | 10 +++-------
> >> include/drm/drm_plane.h | 8 ++++++++
> >> 2 files changed, 11 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/drm_atomic_helper.c
> >> b/drivers/gpu/drm/drm_atomic_helper.c index a4e5477..f83dc43 100644
> >> --- a/drivers/gpu/drm/drm_atomic_helper.c
> >> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> >> @@ -2737,7 +2737,8 @@ static int page_flip_common(
> >> struct drm_atomic_state *state,
> >> struct drm_crtc *crtc,
> >> struct drm_framebuffer *fb,
> >> - struct drm_pending_vblank_event *event)
> >> + struct drm_pending_vblank_event *event,
> >> + uint32_t flags)
> >> {
> >> struct drm_plane *plane = crtc->primary;
> >> struct drm_plane_state *plane_state;
> >> @@ -2754,6 +2755,7 @@ static int page_flip_common(
> >> if (IS_ERR(plane_state))
> >> return PTR_ERR(plane_state);
> >>
> >> + plane_state->pflip_flags = flags;
> >>
> >> ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
> >> if (ret != 0)
> >> @@ -2800,9 +2802,6 @@ int drm_atomic_helper_page_flip(struct drm_crtc
> >> *crtc,
> >> struct drm_atomic_state *state;
> >> int ret = 0;
> >>
> >> - if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
> >> - return -EINVAL;
> >> -
> >
> > With this change all drivers using the helper will not reject that async
> > flag, even if they don't implement support for async page flip. You need
> > to either patch them all to reject the flag, or implement async page flip
> > support for all of them (preferable in the helpers, and then remove the
>
> Please check drm_mode_page_flip_ioctl, one of the checks in the beginning is
>
> if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
> !dev->mode_config.async_page_flip) return -EINVAL;
I think you're right. Sorry for the noise.
> We in DC explicitly set dev->mode_config.async_page_flip = true, any driver
> which is Not supporting ASYNC flip will fail the IOCTL at this point.
> Same in drm_mode_atomic_ioctl
>
> > * Note that for now so called async page flips (i.e. updates which are
> > not
> > * synchronized to vblank) are not supported, since the atomic interfaces
> > have
> > * no provisions for this yet.
> >
> > comment).
>
> Thanks, that a good catch, will remove.
--
Regards,
Laurent Pinchart
