evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

msm: kgsl: Reschedule idle work in case transition to idle state fails

Browse source 
Reschedule the idle work in case transition to idle state is rejected
because the GPU is busy. This change avoids the condition where
transition to NAP state gets rejected due to a pending IRQ which is
currently getting served by IRQ handler because of which GPU remains
in active state even when GPU is idle.

Change-Id: I472a30b6a0e83cdd6957ed12eaa39d0c7731fcb5
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>
This commit is contained in:
Deepak Kumar 2016-09-19 20:33:22 +05:30
parent 057bdafd97
commit 77f0fde9a3
1 changed files with 21 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/gpu/msm/kgsl_pwrctrl.c
View file

@ -1913,20 +1913,38 @@ void kgsl_idle_check(struct work_struct *work)
{
struct kgsl_device *device = container_of(work, struct kgsl_device,
idle_check_ws);
int ret = 0;
unsigned int requested_state;
WARN_ON(device == NULL);
if (device == NULL)
return;
mutex_lock(&device->mutex);
requested_state = device->requested_state;
if (device->state == KGSL_STATE_ACTIVE
|| device->state == KGSL_STATE_NAP) {
if (!atomic_read(&device->active_cnt))
kgsl_pwrctrl_change_state(device,
if (!atomic_read(&device->active_cnt)) {
ret = kgsl_pwrctrl_change_state(device,
device->requested_state);
if (ret == -EBUSY) {
/*
* If the GPU is currently busy, restore
* the requested state and reschedule
* idle work.
*/
kgsl_pwrctrl_request_state(device,
requested_state);
kgsl_schedule_work(&device->idle_check_ws);
}
}
if (!ret)
kgsl_pwrctrl_request_state(device, KGSL_STATE_NONE);
kgsl_pwrctrl_request_state(device, KGSL_STATE_NONE);
if (device->state == KGSL_STATE_ACTIVE)
mod_timer(&device->idle_timer,
jiffies +