On Fri, Nov 17, 2023 at 09:14:31AM +0200, Ville Syrjälä wrote:
> On Thu, Nov 09, 2023 at 04:34:50PM +0100, Maarten Lankhorst wrote:
> > For the atomic codepath we unpin_work in old_plane_state to unpin the
> > old fb. As this happened after swapping state, this is allowed.
> >
> > Use the unpin_work only as a barrier, and keep doing the actual
> > unpinning in the atomic path.
> >
> > Signed-off-by: Maarten Lankhorst <[email protected]>
> > ---
> > .../gpu/drm/i915/display/intel_atomic_plane.c | 18 ++++++++++++
> > .../gpu/drm/i915/display/intel_atomic_plane.h | 2 ++
> > drivers/gpu/drm/i915/display/intel_crtc.c | 28 +++++++++++++++++++
> > 3 files changed, 48 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > index 06c2455bdd788..6ddb4f4ec79ac 100644
> > --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > @@ -1164,6 +1164,9 @@ intel_cleanup_plane_fb(struct drm_plane *plane,
> > intel_display_rps_mark_interactive(dev_priv, state, false);
> >
> > /* Should only be called after a successful intel_prepare_plane_fb()! */
> > + if (old_plane_state->unpin_work.vblank)
> > + drm_vblank_work_flush(&old_plane_state->unpin_work);
>
> This feels rather convoluted. Can't we just schedule the cleanup work
> to the vblank worker instead of the normal wq?
I suppose the other option would be to just do a vblank wait right here.
>
> > +
> > intel_plane_unpin_fb(old_plane_state);
> > }
> >
> > @@ -1176,3 +1179,18 @@ void intel_plane_helper_add(struct intel_plane
> > *plane)
> > {
> > drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
> > }
> > +
> > +/* Completion is enough */
> > +static void intel_plane_cursor_vblank_work(struct kthread_work *base)
> > +{ }
> > +
> > +void intel_plane_init_cursor_vblank_work(struct intel_plane_state
> > *old_plane_state,
> > + struct intel_plane_state
> > *new_plane_state)
> > +{
> > + if (!old_plane_state->ggtt_vma ||
> > + old_plane_state->ggtt_vma == new_plane_state->ggtt_vma)
> > + return;
> > +
> > + drm_vblank_work_init(&old_plane_state->unpin_work,
> > old_plane_state->uapi.crtc,
> > + intel_plane_cursor_vblank_work);
> > +}
> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> > b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> > index 191dad0efc8e6..5a897cf6fa021 100644
> > --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> > +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> > @@ -66,5 +66,7 @@ int intel_plane_check_src_coordinates(struct
> > intel_plane_state *plane_state);
> > void intel_plane_set_invisible(struct intel_crtc_state *crtc_state,
> > struct intel_plane_state *plane_state);
> > void intel_plane_helper_add(struct intel_plane *plane);
> > +void intel_plane_init_cursor_vblank_work(struct intel_plane_state
> > *old_plane_state,
> > + struct intel_plane_state
> > *new_plane_state);
> >
> > #endif /* __INTEL_ATOMIC_PLANE_H__ */
> > diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
> > b/drivers/gpu/drm/i915/display/intel_crtc.c
> > index 1fd068e6e26ca..755c40fd0ac13 100644
> > --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> > +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> > @@ -559,6 +559,19 @@ void intel_pipe_update_start(struct intel_atomic_state
> > *state,
> > if (intel_crtc_needs_vblank_work(new_crtc_state))
> > intel_crtc_vblank_work_init(new_crtc_state);
> >
> > + if (state->base.legacy_cursor_update) {
> > + struct intel_plane *plane;
> > + struct intel_plane_state *old_plane_state, *new_plane_state;
> > + int i;
> > +
> > + for_each_oldnew_intel_plane_in_state(state, plane,
> > old_plane_state,
> > + new_plane_state, i) {
> > + if (old_plane_state->uapi.crtc == &crtc->base)
> > +
> > intel_plane_init_cursor_vblank_work(old_plane_state,
> > +
> > new_plane_state);
> > + }
> > + }
> > +
> > intel_crtc_vblank_evade_scanlines(state, crtc, &min, &max,
> > &vblank_start);
> > if (min <= 0 || max <= 0)
> > goto irq_disable;
> > @@ -721,6 +734,21 @@ void intel_pipe_update_end(struct intel_atomic_state
> > *state,
> > new_crtc_state->uapi.event = NULL;
> > }
> >
> > + if (state->base.legacy_cursor_update) {
> > + struct intel_plane *plane;
> > + struct intel_plane_state *old_plane_state;
> > + int i;
> > +
> > + for_each_old_intel_plane_in_state(state, plane,
> > old_plane_state, i) {
> > + if (old_plane_state->uapi.crtc == &crtc->base &&
> > + old_plane_state->unpin_work.vblank) {
> > +
> > drm_vblank_work_schedule(&old_plane_state->unpin_work,
> > +
> > drm_crtc_accurate_vblank_count(&crtc->base) + 1,
> > + false);
> > + }
> > + }
> > + }
> > +
> > /*
> > * Send VRR Push to terminate Vblank. If we are already in vblank
> > * this has to be done _after_ sampling the frame counter, as
> > --
> > 2.39.2
>
> --
> Ville Syrjälä
> Intel
--
Ville Syrjälä
Intel
