nv-tegra-mirror/linux-nv-oot
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nv-oot.git synced 2025-12-22 17:25:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

devfreq: Add debugfs interface to simple watermark

Browse Source 
This patch adds support to tune low and high watermark values in
debugfs.

Change-Id: I82056a5c1baa29df9e0389fda7d2bc2cc1771978
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/1160007
(cherry picked from linux-4.9 commit 69b139a5024dbe04daf9d22ac2a6493251846f12)
Reviewed-on: https://git-master.nvidia.com/r/1770139
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Timo Alho <talho@nvidia.com>
Tested-by: Timo Alho <talho@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Arto Merilainen
2014-11-07 20:11:58 +02:00
committed by Laxman Dewangan
parent dcc3e906a0
commit 526edececa
1 changed files with 70 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

80
drivers/devfreq/governor_wmark_simple.c
View File

@@ -31,14 +31,22 @@ enum watermark_type {
};
struct wmark_gov_info {
/* probed from the devfreq */
unsigned long *freqlist;
int freq_count;
/* algorithm parameters */
unsigned int p_high_wmark;
unsigned int p_low_wmark;
/* dynamically changing data */
enum watermark_type event;
unsigned long last_request;
enum watermark_type event;
struct devfreq *df;
struct platform_device *pdev;
/* common data */
struct devfreq *df;
struct platform_device *pdev;
struct dentry *debugdir;
};
static unsigned long freqlist_up(struct wmark_gov_info *wmarkinfo,
@@ -84,7 +92,8 @@ static int devfreq_watermark_target_freq(struct devfreq *df,
*freq = freqlist_up(wmarkinfo, dev_stat.current_frequency);
/* always enable low watermark */
df->profile->set_low_wmark(df->dev.parent, 100);
df->profile->set_low_wmark(df->dev.parent,
wmarkinfo->p_low_wmark);
/* disable high watermark if no change */
if (*freq == wmarkinfo->last_request)
@@ -94,7 +103,8 @@ static int devfreq_watermark_target_freq(struct devfreq *df,
*freq = freqlist_down(wmarkinfo, dev_stat.current_frequency);
/* always enable high watermark */
df->profile->set_high_wmark(df->dev.parent, 600);
df->profile->set_high_wmark(df->dev.parent,
wmarkinfo->p_high_wmark);
/* disable low watermark if no change */
if (*freq == wmarkinfo->last_request)
@@ -111,6 +121,46 @@ static int devfreq_watermark_target_freq(struct devfreq *df,
return 0;
}
static void devfreq_watermark_debug_start(struct devfreq *df)
{
struct wmark_gov_info *wmarkinfo = df->data;
struct dentry *f;
char dirname[128];
snprintf(dirname, sizeof(dirname), "%s_scaling",
to_platform_device(df->dev.parent)->name);
if (!wmarkinfo)
return;
wmarkinfo->debugdir = debugfs_create_dir(dirname, NULL);
if (!wmarkinfo->debugdir) {
pr_warn("cannot create debugfs directory\n");
return;
}
#define CREATE_DBG_FILE(fname) \
do {\
f = debugfs_create_u32(#fname, S_IRUGO | S_IWUSR, \
wmarkinfo->debugdir, &wmarkinfo->p_##fname); \
if (NULL == f) { \
pr_warn("cannot create debug entry " #fname "\n"); \
return; \
} \
} while (0)
CREATE_DBG_FILE(low_wmark);
CREATE_DBG_FILE(high_wmark);
#undef CREATE_DBG_FILE
}
static void devfreq_watermark_debug_stop(struct devfreq *df)
{
struct wmark_gov_info *wmarkinfo = df->data;
debugfs_remove_recursive(wmarkinfo->debugdir);
}
static int devfreq_watermark_start(struct devfreq *df)
{
struct wmark_gov_info *wmarkinfo;
@@ -131,6 +181,10 @@ static int devfreq_watermark_start(struct devfreq *df)
wmarkinfo->event = NO_WATERMARK_EVENT;
wmarkinfo->df = df;
wmarkinfo->pdev = pdev;
wmarkinfo->p_low_wmark = 100;
wmarkinfo->p_high_wmark = 600;
devfreq_watermark_debug_start(df);
return 0;
}
@@ -145,12 +199,16 @@ static int devfreq_watermark_event_handler(struct devfreq *df,
switch (event) {
case DEVFREQ_GOV_START:
devfreq_watermark_start(df);
wmarkinfo = df->data;
if (df->profile->set_low_wmark)
df->profile->set_low_wmark(df->dev.parent, 100);
df->profile->set_low_wmark(df->dev.parent,
wmarkinfo->p_low_wmark);
if (df->profile->set_high_wmark)
df->profile->set_high_wmark(df->dev.parent, 600);
df->profile->set_high_wmark(df->dev.parent,
wmarkinfo->p_high_wmark);
break;
case DEVFREQ_GOV_STOP:
devfreq_watermark_debug_stop(df);
break;
case DEVFREQ_GOV_SUSPEND:
devfreq_monitor_suspend(df);
@@ -158,9 +216,11 @@ static int devfreq_watermark_event_handler(struct devfreq *df,
case DEVFREQ_GOV_RESUME:
if (df->profile->set_low_wmark)
df->profile->set_low_wmark(df->dev.parent, 100);
df->profile->set_low_wmark(df->dev.parent,
wmarkinfo->p_low_wmark);
if (df->profile->set_high_wmark)
df->profile->set_high_wmark(df->dev.parent, 600);
df->profile->set_high_wmark(df->dev.parent,
wmarkinfo->p_high_wmark);
devfreq_monitor_resume(df);
break;