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Merge "msm: kgsl: Add a dynamic AB bandwidth vote"

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Linux Build Service Account 2014-12-02 17:39:56 -08:00 committed by Gerrit - the friendly Code Review server
parent 860aa3c72f dd2286bf25
commit 5c7ba6daab
1 changed files with 15 additions and 0 deletions
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15
drivers/devfreq/governor_gpubw_mon.c
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@ -53,6 +53,12 @@ static int devfreq_gpubw_get_target(struct devfreq *df,
int act_level;
int norm_cycles;
int gpu_percent;
/*
* Normalized AB should at max usage be the gpu_bimc frequency in MHz.
* Start with a reasonable value and let the system push it up to max.
*/
static int norm_ab_max = 300;
int norm_ab;
stats.private_data = &b;
@ -97,6 +103,15 @@ static int devfreq_gpubw_get_target(struct devfreq *df,
bus_profile->flag = DEVFREQ_FLAG_SLOW_HINT;
}
/* Re-calculate the AB percentage for a new IB vote */
if (bus_profile->flag) {
norm_ab = (unsigned int)priv->bus.ram_time /
(unsigned int) priv->bus.total_time;
if (norm_ab > norm_ab_max)
norm_ab_max = norm_ab;
bus_profile->percent_ab = (100 * norm_ab) / norm_ab_max;
}
priv->bus.total_time = 0;
priv->bus.gpu_time = 0;
priv->bus.ram_time = 0;