[PATCH v6 24/30] drm/rockchip: Disable PSR on input events

Ezequiel Garcia ezequiel at collabora.com
Mon Apr 16 12:42:29 PDT 2018

On Thu, 2018-04-05 at 11:49 +0200, Enric Balletbo i Serra wrote:
> From: "Kristian H. Kristensen" <hoegsberg at google.com>
> To improve PSR exit latency, we speculatively start exiting when we
> receive input events. Occasionally, this may lead to false positives,
> but most of the time we get a head start on coming out of PSR.
> Depending
> on how userspace takes to produce a new frame in response to the
> event,
> this can completely hide the exit latency. In case of Chrome OS, we
> typically get the input notifier 50ms or more before the dirty_fb
> triggered exit.

Why is this rockchip-specific? It sounds more like something
we'd want to integrate generically for drivers to leverage.


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