Re: [PATCH] Add virtio gpu driver.

Hi,

On 24 March 2015 at 16:07, Gerd Hoffmann [off-list ref] wrote:

+static int virtio_gpu_crtc_page_flip(struct drm_crtc *crtc,
+                                    struct drm_framebuffer *fb,
+                                    struct drm_pending_vblank_event *event,
+                                    uint32_t flags)
+{
+       return -EINVAL;
+}

I'm not going to lie, I was really hoping the 5th (?) GPU option for
Qemu would support pageflipping. Daniel's comment about conversion to
atomic is relevant, but: do you have a mechanism which allows you to
post updates (e.g. 'start displaying this buffer now please') that
allows you to get events back when they have actually been displayed?

Cheers,
Daniel