[PATCH v3 7/7] [wip] virtio-gpu: add page flip support

Gerd Hoffmann
2015-10-02T11:58:45Z

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
drivers/gpu/drm/virtio/virtgpu_display.c | 49 ++++++++++++++++++++++++++++++--
1 file changed, 46 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index c9c1427..f545913 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -125,6 +125,51 @@ static int virtio_gpu_crtc_cursor_move(struct drm_crtc *crtc,
return 0;
}

+static int virtio_gpu_page_flip(struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event,
+ uint32_t flags)
+{
+ struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
+ struct virtio_gpu_output *output =
+ container_of(crtc, struct virtio_gpu_output, crtc);
+ struct drm_plane *plane = crtc->primary;
+ struct virtio_gpu_framebuffer *vgfb;
+ struct virtio_gpu_object *bo;
+ unsigned long irqflags;
+ uint32_t handle;
+
+ plane->fb = fb;
+ vgfb = to_virtio_gpu_framebuffer(plane->fb);
+ bo = gem_to_virtio_gpu_obj(vgfb->obj);
+ handle = bo->hw_res_handle;
+
+ DRM_DEBUG("handle 0x%x%s, crtc %dx%d\n", handle,
+ bo->dumb ? ", dumb" : "",
+ crtc->mode.hdisplay, crtc->mode.vdisplay);
+ if (bo->dumb) {
+ virtio_gpu_cmd_transfer_to_host_2d
+ (vgdev, handle, 0,
+ cpu_to_le32(crtc->mode.hdisplay),
+ cpu_to_le32(crtc->mode.vdisplay),
+ 0, 0, NULL);
+ }
+ virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
+ crtc->mode.hdisplay,
+ crtc->mode.vdisplay, 0, 0);
+ virtio_gpu_cmd_resource_flush(vgdev, handle, 0, 0,
+ crtc->mode.hdisplay,
+ crtc->mode.vdisplay);
+
+ if (event) {
+ spin_lock_irqsave(&crtc->dev->event_lock, irqflags);
+ drm_send_vblank_event(crtc->dev, -1, event);
+ spin_unlock_irqrestore(&crtc->dev->event_lock, irqflags);
+ }
+
+ return 0;
+}
+
static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
.cursor_set2 = virtio_gpu_crtc_cursor_set,
.cursor_move = virtio_gpu_crtc_cursor_move,
@@ -132,9 +177,7 @@ static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.destroy = drm_crtc_cleanup,

-#if 0 /* not (yet) working without vblank support according to docs */
- .page_flip = drm_atomic_helper_page_flip,
-#endif
+ .page_flip = virtio_gpu_page_flip,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
--
1.8.3.1