On Fri, Nov 13, 2015 at 10:38:07AM +0000, Daniel Stone wrote:
> Hi,
>
> On 13 November 2015 at 10:08, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> > On Thu, Nov 12, 2015 at 05:49:28PM -0800, Alex Goins wrote:
> >> static const uint32_t i8xx_primary_formats[] = {
> >> @@ -11170,10 +11172,19 @@ static void ilk_do_mmio_flip(struct intel_crtc *intel_crtc)
> >> static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
> >> {
> >> struct drm_device *dev = intel_crtc->base.dev;
> >> + struct drm_i915_gem_object *pending_flip_obj =
> >> + intel_crtc->unpin_work->pending_flip_obj;
> >> u32 start_vbl_count;
> >>
> >> intel_mark_page_flip_active(intel_crtc);
> >>
> >> + /* For framebuffer backed by dmabuf, wait for fence */
> >> + if (pending_flip_obj->base.dma_buf) {
> >> + reservation_object_wait_timeout_rcu(
> >> + pending_flip_obj->base.dma_buf->resv,
> >> + true, false, msecs_to_jiffies(96));
> >> + }
> >
> > This wait should be prior to marking the flip as waiting for the
> > flip-completion interrupt. My personal preference (aside from putting
> > this next to the other wait) would to have been to use crtc->primary->fb
> > to match the do_mmip_flips funcs (I expect that we will eliminate the
> > pending_flip_obj in the near future).
>
> No, don't use crtc->primary->fb for anything.
s/crtc->primary->fb/whatever is actually used by the ilk_do_mmio_flip
and co which is certainly not pending_flip_obj/
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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