staging: vboxvideo: Restore page-flip support

Restore page-flip support now that the atomic conversion is complete.

Since the mode parameter to vbox_crtc_set_base_and_mode() now never
is NULL call drm_atomic_crtc_needs_modeset() to check if we need to
check for input-mapping changes, to avoid doing unnecesarry work on
a flip. And hookup the drm_atomic_helper_page_flip helper to implement
the page_flip callback.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vboxvideo/vbox_mode.c b/drivers/staging/vboxvideo/vbox_mode.c
index 69a1e6c..c4ec3fa 100644 (file)
--- a/drivers/staging/vboxvideo/vbox_mode.c
+++ b/drivers/staging/vboxvideo/vbox_mode.c
@@ -32,6 +32,7 @@
  *          Hans de Goede <hdegoede@redhat.com>
  */
 #include <linux/export.h>
+#include <drm/drm_atomic.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_atomic_helper.h>
@@ -217,6 +218,7 @@ static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
        struct vbox_bo *bo = gem_to_vbox_bo(to_vbox_framebuffer(fb)->obj);
        struct vbox_private *vbox = crtc->dev->dev_private;
        struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
+       bool needs_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
 
        mutex_lock(&vbox->hw_mutex);
 
@@ -227,7 +229,7 @@ static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
        vbox_crtc->fb_offset = vbox_bo_gpu_offset(bo);
 
        /* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
-       if (mode && vbox_set_up_input_mapping(vbox)) {
+       if (needs_modeset && vbox_set_up_input_mapping(vbox)) {
                struct drm_crtc *crtci;
 
                list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list,
@@ -241,7 +243,7 @@ static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
        vbox_set_view(crtc);
        vbox_do_modeset(crtc);
 
-       if (mode)
+       if (needs_modeset)
                hgsmi_update_input_mapping(vbox->guest_pool, 0, 0,
                                           vbox->input_mapping_width,
                                           vbox->input_mapping_height);
@@ -288,6 +290,7 @@ static void vbox_crtc_destroy(struct drm_crtc *crtc)
 
 static const struct drm_crtc_funcs vbox_crtc_funcs = {
        .set_config = drm_atomic_helper_set_config,
+       .page_flip = drm_atomic_helper_page_flip,
        /* .gamma_set = vbox_crtc_gamma_set, */
        .destroy = vbox_crtc_destroy,
        .reset = drm_atomic_helper_crtc_reset,