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msm: kgsl: Add support for gpu busy multiplier

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Adding support to increase/decrease gpu performance based on mod_percent.
This can be configured by user using new sysfs entry added in devfreq.
User needs to set mod_percent as multiplier percent which is used to
update measured GPU busy value before dcvs algorithm is run.
Example -
mod_percent = 120 (update gpu_busy to 120%)
mod_percent = 80 (update gpu_busy to 80%).

Change-Id: Ic6310b3a7751d5ccadd23332df76ddbcab450493
Signed-off-by: Pankaj Gupta <gpankaj@codeaurora.org>
This commit is contained in:
Pankaj Gupta 2020-05-27 13:33:28 +05:30
commit f4ca017d8d
3 changed files with 42 additions and 1 deletions
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38
drivers/gpu/msm/governor_msm_adreno_tz.c
View file

@ -130,13 +130,42 @@ static ssize_t suspend_time_show(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%llu\n", time_diff);
}
static ssize_t mod_percent_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned int val;
struct devfreq *devfreq = to_devfreq(dev);
struct devfreq_msm_adreno_tz_data *priv = devfreq->data;
ret = kstrtou32(buf, 0, &val);
if (ret)
return ret;
priv->mod_percent = clamp_t(u32, val, 10, 1000);
return count;
}
static ssize_t mod_percent_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct devfreq *devfreq = to_devfreq(dev);
struct devfreq_msm_adreno_tz_data *priv = devfreq->data;
return scnprintf(buf, PAGE_SIZE, "%u\n", priv->mod_percent);
}
static DEVICE_ATTR_RO(gpu_load);
static DEVICE_ATTR_RO(suspend_time);
static DEVICE_ATTR_RW(mod_percent);
static const struct device_attribute *adreno_tz_attr_list[] = {
&dev_attr_gpu_load,
&dev_attr_suspend_time,
&dev_attr_mod_percent,
NULL
};
@ -327,6 +356,7 @@ static int tz_get_target_freq(struct devfreq *devfreq, unsigned long *freq)
struct devfreq_dev_status *stats = &devfreq->last_status;
int val, level = 0;
int context_count = 0;
u64 busy_time;
/* keeps stats.private_data == NULL */
result = devfreq_update_stats(devfreq);
@ -337,6 +367,14 @@ static int tz_get_target_freq(struct devfreq *devfreq, unsigned long *freq)
*freq = stats->current_frequency;
priv->bin.total_time += stats->total_time;
/* Update gpu busy time as per mod_percent */
busy_time = stats->busy_time * priv->mod_percent;
do_div(busy_time, 100);
/* busy_time should not go over total_time */
stats->busy_time = min_t(u64, busy_time, stats->total_time);
priv->bin.busy_time += stats->busy_time;
if (stats->private_data)

1
drivers/gpu/msm/kgsl_pwrscale.c
View file

@ -16,6 +16,7 @@ static struct devfreq_msm_adreno_tz_data adreno_tz_data = {
.max = 350,
.floating = true,
},
.mod_percent = 100,
};
/**

4
drivers/gpu/msm/msm_adreno_devfreq.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
*/
#ifndef MSM_ADRENO_DEVFREQ_H
@ -61,6 +61,8 @@ struct devfreq_msm_adreno_tz_data {
bool is_64;
bool disable_busy_time_burst;
bool ctxt_aware_enable;
/* Multiplier to change gpu busy status */
u32 mod_percent;
};
struct msm_adreno_extended_profile {