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yours3lf 2020-06-03 00:06:26 +01:00
parent 5c4dc59395
commit 739216bf7c
1 changed files with 25 additions and 1 deletions
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26
driver/modeset.c
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@ -389,10 +389,34 @@ void modeset_present(int fd, _image *buf, modeset_display_surface* surface)
saved_state_guard = 0;
}
//TODO use DRM_MODE_PAGE_FLIP_EVENT to catch when an image can be used again (eg. for acquireimagekhr)
//TODO presenting needs to happen *after* the gpu is done with rendering to an image
//then immediate mode flips the page immediately, but fifo will post it for next vblank
//otherwise fifo would tear too
//so we should add images to the flip queue
//then wait for the first submitted (first out) seqno to finish
//then perform pageflip for that image
//
if(buf->presentMode == VK_PRESENT_MODE_IMMEDIATE_KHR)
{
vsyncData d;
d.i = buf;
d.s = surface;
d.pending = 0;
uint32_t added = 0;
while(!added)
{
while(flip_queue_guard);
flip_queue_guard = 1;
//try to add request to queue
added = fifoAdd(&flipQueueFifo, &d);
flip_queue_guard = 0;
}
drmModePageFlip(fd, surface->crtc->crtc_id, buf->fb, DRM_MODE_PAGE_FLIP_ASYNC, 0);
}
else if(buf->presentMode == VK_PRESENT_MODE_FIFO_KHR)