[PATCH 03/12] drm: Make blocking vblank wait return when the vblank interrupts get disabled

Thierry Reding thierry.reding at gmail.com
Wed May 21 04:24:20 PDT 2014

On Wed, May 21, 2014 at 01:20:55PM +0200, Thierry Reding wrote:
> On Wed, May 14, 2014 at 08:51:05PM +0200, Daniel Vetter wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > If there's a blocking vblank wait in progress while the vblank interrupt
> > gets disabled, the current code will just let the vblank wait time out.
> > Instead make it return immediately when vblank interrupts get disabled.
> Can this even happen? drm_wait_vblank() takes a vblank reference earlier
> and drops it right before returning. But perhaps this will become
> obvious since from a quick peek some of the subsequent patches seem like
> they will make it possible to force VBLANK off?

Ah, it seems like drm_vblank_off() can already do exactly that, in which
case this makes sense:

Reviewed-by: Thierry Reding <treding at nvidia.com>
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