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.
Cheers,
Daniel
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