On 19. 7. 8. 오전 7:32, Dmitry Osipenko wrote: > The memory activity counter may get a bit higher than a watermark which > is selected based on OPP that corresponds to a highest EMC rate, in this > case watermark is lower than the actual memory activity is and thus > results in unwanted "upper" interrupts. > > Signed-off-by: Dmitry Osipenko <[email protected]> > --- > drivers/devfreq/tegra30-devfreq.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-)
It seems that you can combine patch19 with patch20. > > diff --git a/drivers/devfreq/tegra30-devfreq.c > b/drivers/devfreq/tegra30-devfreq.c > index 8d6bf6e9f1ae..c3cf87231d25 100644 > --- a/drivers/devfreq/tegra30-devfreq.c > +++ b/drivers/devfreq/tegra30-devfreq.c > @@ -363,7 +363,18 @@ static void tegra_devfreq_update_wmark(struct > tegra_devfreq *tegra, > tegra_actmon_get_lower_upper(tegra, dev, freq - 1, &lower, &upper); > > delta = do_percent(upper - lower, dev->config->boost_up_threshold); > - device_writel(dev, lower + delta, ACTMON_DEV_UPPER_WMARK); > + > + /* > + * The memory events count could go a bit higher than the maximum > + * defined by the OPPs, hence make the upper watermark infinitely > + * high to avoid unnecessary upper interrupts in that case. > + */ > + if (freq == tegra->max_freq) > + upper = ULONG_MAX; > + else > + upper = lower + delta; > + > + device_writel(dev, upper, ACTMON_DEV_UPPER_WMARK); > > /* > * Meanwhile the lower mark is based on the average value > -- Best Regards, Chanwoo Choi Samsung Electronics
