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Commit f4ca017d authored by Pankaj Gupta's avatar Pankaj Gupta
Browse files

msm: kgsl: Add support for gpu busy multiplier 



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: default avatarPankaj Gupta <gpankaj@codeaurora.org>
parent ad191fdc

drivers/gpu/msm/governor_msm_adreno_tz.c

+38 −0
Original line number Diff line number Diff line
@@ -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)

drivers/gpu/msm/kgsl_pwrscale.c

+1 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ static struct devfreq_msm_adreno_tz_data adreno_tz_data = { 
		.max = 350,

		.floating = true,

	},

	.mod_percent = 100,

};



/**

drivers/gpu/msm/msm_adreno_devfreq.h

+3 −1
Original line number Diff line number Diff line 
/* 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 {