On Mon, Apr 10, 2017 at 01:06:46PM -0700, Eric Anholt wrote:
> Gustavo Padovan <gustavo@xxxxxxxxxxx> writes:
>
> > From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
> >
> > Add support to async updates of cursors by using the new atomic
> > interface for that. Basically what this commit does is do what
> > vc4_update_plane() did but through atomic.
> >
> > Cc: Eric Anholt <eric@xxxxxxxxxx>
> > Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/vc4/vc4_plane.c | 94 ++++++++++++-----------------------------
> > 1 file changed, 27 insertions(+), 67 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
> > index d34cd53..e33c75b 100644
> > --- a/drivers/gpu/drm/vc4/vc4_plane.c
> > +++ b/drivers/gpu/drm/vc4/vc4_plane.c
> > @@ -735,70 +735,27 @@ void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
> > vc4_state->dlist[vc4_state->ptr0_offset] = addr;
> > }
> >
> > -static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
> > - .atomic_check = vc4_plane_atomic_check,
> > - .atomic_update = vc4_plane_atomic_update,
> > -};
> > -
> > -static void vc4_plane_destroy(struct drm_plane *plane)
> > -{
> > - drm_plane_helper_disable(plane);
> > - drm_plane_cleanup(plane);
> > -}
> > -
> > -/* Implements immediate (non-vblank-synced) updates of the cursor
> > - * position, or falls back to the atomic helper otherwise.
> > - */
> > -static int
> > -vc4_update_plane(struct drm_plane *plane,
> > - struct drm_crtc *crtc,
> > - struct drm_framebuffer *fb,
> > - int crtc_x, int crtc_y,
> > - unsigned int crtc_w, unsigned int crtc_h,
> > - uint32_t src_x, uint32_t src_y,
> > - uint32_t src_w, uint32_t src_h,
> > - struct drm_modeset_acquire_ctx *ctx)
> > +static int vc4_plane_atomic_async_check(struct drm_plane *plane,
> > + struct drm_plane_state *state)
> > {
> > - struct drm_plane_state *plane_state;
> > - struct vc4_plane_state *vc4_state;
> > -
> > - if (plane != crtc->cursor)
> > - goto out;
> > -
> > - plane_state = plane->state;
> > - vc4_state = to_vc4_plane_state(plane_state);
> > -
> > - if (!plane_state)
> > - goto out;
> > + if (plane != state->crtc->cursor)
> > + return -EINVAL;
> >
> > - /* No configuring new scaling in the fast path. */
> > - if (crtc_w != plane_state->crtc_w ||
> > - crtc_h != plane_state->crtc_h ||
> > - src_w != plane_state->src_w ||
> > - src_h != plane_state->src_h) {
> > - goto out;
> > - }
> > + if (!plane->state)
> > + return -EINVAL;
> >
> > - if (fb != plane_state->fb) {
> > - drm_atomic_set_fb_for_plane(plane->state, fb);
> > - vc4_plane_async_set_fb(plane, fb);
> > - }
> > + return 0;
> > +}
> >
> > - /* Set the cursor's position on the screen. This is the
> > - * expected change from the drm_mode_cursor_universal()
> > - * helper.
> > - */
> > - plane_state->crtc_x = crtc_x;
> > - plane_state->crtc_y = crtc_y;
> > +static void vc4_plane_atomic_async_update(struct drm_plane *plane,
> > + struct drm_plane_state *new_state)
> > +{
> > + struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
> >
> > - /* Allow changing the start position within the cursor BO, if
> > - * that matters.
> > - */
> > - plane_state->src_x = src_x;
> > - plane_state->src_y = src_y;
> > + if (plane->state->fb != new_state->fb)
> > + vc4_plane_async_set_fb(plane, new_state->fb);
> >
> > - /* Update the display list based on the new crtc_x/y. */
> > - vc4_plane_atomic_check(plane, plane_state);
> > + plane->state->fb = new_state->fb;
>
> The vc4_plane_atomic_check() is what sets up the dlist[]'s position
> fields that are used right after this, so this call needs to stay in
> place, and x/y need to be updated already (since we're looking at
> plane->state, not new_state).
>
> Also, I think we'll need to make sure that you're not trying to
> enable/disable the plane in the fast path, since we're not updating the
> CTL0_VALID field.
Yeah, I think the core should even check for that, by comparing
old/new_state->crtc, and if they don't match, fall back to full commit.
We already check a massive pile of other stuff anyway.
-Daniel
>
> > /* Note that we can't just call vc4_plane_write_dlist()
> > * because that would smash the context data that the HVS is
> > @@ -810,20 +767,23 @@ vc4_update_plane(struct drm_plane *plane,
> > &vc4_state->hw_dlist[vc4_state->pos2_offset]);
> > writel(vc4_state->dlist[vc4_state->ptr0_offset],
> > &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
> > +}
> _______________________________________________
> 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
