Adds crtc page-flip support by passing the new requested framebuffer to vbox_crtc_do_set_base().
Note there is no attempt to support vblank interrupts, it's not not known how to do this in VBOX or if it is even possible. Since this page-flip implementation does not try to sync the page-flip to vertical blanking, tearing effects are possible.
Signed-off-by: Steve Longerbeam steve_longerbeam@mentor.com --- drivers/staging/vboxvideo/vbox_mode.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/drivers/staging/vboxvideo/vbox_mode.c b/drivers/staging/vboxvideo/vbox_mode.c index 688e80d..285d8ad 100644 --- a/drivers/staging/vboxvideo/vbox_mode.c +++ b/drivers/staging/vboxvideo/vbox_mode.c @@ -308,6 +308,31 @@ static int vbox_crtc_mode_set(struct drm_crtc *crtc, return ret; }
+static int vbox_crtc_page_flip(struct drm_crtc *crtc, + struct drm_framebuffer *fb, + struct drm_pending_vblank_event *event, + uint32_t page_flip_flags, + struct drm_modeset_acquire_ctx *ctx) +{ + struct vbox_private *vbox = crtc->dev->dev_private; + struct drm_device *drm = vbox->dev; + unsigned long flags; + int rc; + + rc = vbox_crtc_do_set_base(crtc, CRTC_FB(crtc), fb, 0, 0); + if (rc) + return rc; + + spin_lock_irqsave(&drm->event_lock, flags); + + if (event) + drm_crtc_send_vblank_event(crtc, event); + + spin_unlock_irqrestore(&drm->event_lock, flags); + + return 0; +} + static void vbox_crtc_disable(struct drm_crtc *crtc) { } @@ -346,6 +371,7 @@ static const struct drm_crtc_funcs vbox_crtc_funcs = { .reset = vbox_crtc_reset, .set_config = drm_crtc_helper_set_config, /* .gamma_set = vbox_crtc_gamma_set, */ + .page_flip = vbox_crtc_page_flip, .destroy = vbox_crtc_destroy, };