On Thu, Feb 1, 2018 at 9:53 AM Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: > Quoting Andy Lutomirski (2018-02-01 17:40:22) > > *However*, I do see one unfortunate side effect of turning on PSR. It > > seems that, when I move my cursor a little bit after a few seconds of > > doing nothing, there seems to be a little bit of lag, as if either a > > few frames are dropped at the beginning of the motion or maybe the > > entire motion is delayed a bit. I don't notice a similar delay when > > typing, so I'm wondering if maybe there's a min > or driver bug in which > > the driver doesn't kick the panel out of PSR quite as quickly when the > > cursor is updated as it does when the framebuffer is updated. > One thing that's important know regarding the cursor is whether the > display server is using a HW cursor or SW cursor. Could you please attach > the log from the display server (or if you are using a stock > distribution that's probably enough to work out what it is using)? > -Chris We had a similar problem for Rockchip in ChromeOS and ended up using an input handler to let us start the PSR exit as early as possible: https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.4/drivers/gpu/drm/rockchip/rockchip_drm_psr.c#345 It's similar in spirit to the interactive cpufreq governor: https://lwn.net/Articles/662209/ Kristian _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
