Re: Synchronization between a crtc mode_set and page_flip?

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On Wednesday 02 April 2014 06:41 PM, Rob Clark wrote:
On Wed, Apr 2, 2014 at 5:52 AM, Archit Taneja <archit@xxxxxx> wrote:
Hi,

I was trying to figure out how we are supposed to manage synchronization
between a mode_set and a page_flip called on a crtc.

Say, if a mode_set is immediately followed by a page_flip. The driver can't
process the page_flip straight away since the hardware is still completing
the mode_set.

I guess setcrtc is expected to be synchronous(ish).. so a lot of
userspace won't expect the first pageflip to fail with -EBUSY.

Okay, thanks. I guess having setcrtc synchronous isn't that bad.

Archit
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