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devfreq: Support suspend and resume in tegra_wmark

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When devfreq_suspend_device get called, tegra_wmark will disable the
upper and lower watermark thresholds so that no DFS logic get triggered
after the suspension.

When devfreq_resume_device get called, tegra_wmark will enable back the
upper and lower watermark thresholds so that interrupt-driven DFS logic
can work properly.

Bug 4168788

Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Change-Id: I98fa1487db26fdfe95f5c958dbe15bf0f49035d5
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2927019
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Johnny Liu
2023-06-27 08:11:04 +00:00
committed by mobile promotions
parent df0489a1e0
commit 0da771f275
1 changed files with 10 additions and 0 deletions
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10
drivers/devfreq/tegra_wmark.c
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@@ -497,6 +497,8 @@ static int devfreq_tegra_wmark_event_handler(struct devfreq *df,
unsigned int event,
void *data)
{
struct devfreq_tegra_wmark_data *drvdata = df->data;
struct devfreq_tegra_wmark_config wmark_config;
int err;
switch (event) {
@@ -510,6 +512,14 @@ static int devfreq_tegra_wmark_event_handler(struct devfreq *df,
case DEVFREQ_GOV_STOP:
tegra_wmark_exit(df);
break;
case DEVFREQ_GOV_SUSPEND:
wmark_config.upper_wmark_enabled = 0;
wmark_config.lower_wmark_enabled = 0;
drvdata->update_wmark_threshold(df, &wmark_config);
break;
case DEVFREQ_GOV_RESUME:
devfreq_update_wmark_threshold(df);
break;
default:
break;
}