drm_mode_page_flip_ioctl() cannot deal with the in between phase of the transitioning to atomic modeset support. Once we start using drm_helper_crtc_mode_set(), we start setting plane->state on the primary plane. But we are not fully atomic yet so then set both plane-state->fb and plane->fb.
If both plane-state->fb and plane->fb are set drm_mode_page_flip_ioctl() gets confused and stops calling drm_framebuffer_get() on the new fb while still calling drm_framebuffer_put() on the old fb.
The current page_flip implementation expects drm_mode_page_flip_ioctl() to take care of both and once we switch to drm_atomic_helper_page_flip() that will expect neither to be done, taking care of both itself.
So for the transition we need to remove page_flip support and then after the transition is complete and we set DRIVER_ATOMIC in our driver_features, we can start using drm_atomic_helper_page_flip().
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/staging/vboxvideo/vbox_mode.c | 35 --------------------------- 1 file changed, 35 deletions(-)
diff --git a/drivers/staging/vboxvideo/vbox_mode.c b/drivers/staging/vboxvideo/vbox_mode.c index babb02a1ebf2..adb6bcf989d1 100644 --- a/drivers/staging/vboxvideo/vbox_mode.c +++ b/drivers/staging/vboxvideo/vbox_mode.c @@ -282,40 +282,6 @@ static int vbox_crtc_mode_set(struct drm_crtc *crtc, return 0; }
-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_bo *bo = gem_to_vbox_bo(to_vbox_framebuffer(fb)->obj); - struct drm_framebuffer *old_fb = CRTC_FB(crtc); - unsigned long flags; - int rc; - - rc = vbox_bo_pin(bo, TTM_PL_FLAG_VRAM); - if (rc) { - DRM_WARN("Error %d pinning new fb, out of video mem?\n", rc); - return rc; - } - - vbox_crtc_set_base_and_mode(crtc, fb, NULL, 0, 0); - - if (old_fb) { - bo = gem_to_vbox_bo(to_vbox_framebuffer(old_fb)->obj); - vbox_bo_unpin(bo); - } - - spin_lock_irqsave(&crtc->dev->event_lock, flags); - - if (event) - drm_crtc_send_vblank_event(crtc, event); - - spin_unlock_irqrestore(&crtc->dev->event_lock, flags); - - return 0; -} - static void vbox_crtc_disable(struct drm_crtc *crtc) { } @@ -353,7 +319,6 @@ 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, };