Messages in this thread | | | Date | Thu, 25 Jul 2019 16:42:48 +0300 | From | Andy Shevchenko <> | Subject | Re: [PATCH] mfd: intel-lpss: Remove D3cold delay |
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On Thu, Jul 25, 2019 at 01:05:54PM +0100, Lee Jones wrote: > On Tue, 09 Jul 2019, Andy Shevchenko wrote: > > > On Fri, Jul 05, 2019 at 12:55:03PM +0800, Kai-Heng Feng wrote: > > > Goodix touchpad may drop its first couple input events when > > > i2c-designware-platdrv and intel-lpss it connects to took too long to > > > runtime resume from runtime suspended state. > > > > > > This issue happens becuase the touchpad has a rather small buffer to > > > store up to 13 input events, so if the host doesn't read those events in > > > time (i.e. runtime resume takes too long), events are dropped from the > > > touchpad's buffer. > > > > > > The bottleneck is D3cold delay it waits when transitioning from D3cold > > > to D0, hence remove the delay to make the resume faster. I've tested > > > some systems with intel-lpss and haven't seen any regression. > > > > Thank you for the patch. I took it to our internal testing and will tell > > the result within couple of weeks. > > Any news?
No bug reports, no negative feedback, I think we may proceed with it. Thanks!
-- With Best Regards, Andy Shevchenko
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