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gpu: nvgpu: Remove gk20a_scale_notify_busy/idle() hooks

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Remove dependency for nvgpu to invoke devfreq govenor on every
gk20a_busy/idle() call. This dependency was originally necessary to
track GPU load (busy vs idle) in software. However, since we currently
read the load GPU from HW/PMU there is no need to invoke the devfreq
governor in this path. Instead it can use timer-based polling.

Jira NVGPU-20

Change-Id: Id09f89a8a562ed49164a2e06dcbb901e4a46e7d5
Signed-off-by: Peter Boonstoppel <pboonstoppel@nvidia.com>
Reviewed-on: https://git-master/r/1473140
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Peter Boonstoppel
2017-05-01 10:19:23 -07:00
committed by mobile promotions
parent f7e37e6847
commit 635e9946b7
2 changed files with 0 additions and 45 deletions
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10
drivers/gpu/nvgpu/common/linux/module.c
View File

@@ -96,8 +96,6 @@ int gk20a_busy(struct gk20a *g)
}
}
gk20a_scale_notify_busy(dev);
fail:
up_read(&g->busy_lock);
@@ -121,16 +119,8 @@ void gk20a_idle(struct gk20a *g)
return;
if (pm_runtime_enabled(dev)) {
#ifdef CONFIG_PM
if (atomic_read(&g->dev->power.usage_count) == 1)
gk20a_scale_notify_idle(dev);
#endif
pm_runtime_mark_last_busy(dev);
pm_runtime_put_sync_autosuspend(dev);
} else {
gk20a_scale_notify_idle(dev);
}
}

35
drivers/gpu/nvgpu/gk20a/gk20a_scale.c
View File

@@ -267,41 +267,6 @@ void gk20a_scale_resume(struct device *dev)
devfreq_resume_device(devfreq);
}
/*
* gk20a_scale_notify(dev, busy)
*
* Calling this function informs that the device is idling (..or busy). This
* data is used to estimate the current load
*/
static void gk20a_scale_notify(struct device *dev, bool busy)
{
struct gk20a *g = get_gk20a(dev);
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
struct gk20a_scale_profile *profile = g->scale_profile;
struct devfreq *devfreq = l->devfreq;
/* Is the device profile initialised? */
if (!(profile && devfreq))
return;
mutex_lock(&devfreq->lock);
profile->dev_stat.busy = busy;
update_devfreq(devfreq);
mutex_unlock(&devfreq->lock);
}
void gk20a_scale_notify_idle(struct device *dev)
{
gk20a_scale_notify(dev, false);
}
void gk20a_scale_notify_busy(struct device *dev)
{
gk20a_scale_notify(dev, true);
}
/*
* gk20a_scale_get_dev_status(dev, *stat)
*