Re: [PATCH] drm/i915/bdw: cancel the SW turbo tasks before runtime suspending

["Sun, Daisy" <daisy.sun@intel.com>]

Need to reset the flip_received flag at the end of this block, indicate 
that the flip interrupt will stop working.

+       if (dev_priv->rps.is_bdw_sw_turbo) {
+               del_timer_sync(&dev_priv->rps.sw_turbo.flip_timer);
+               cancel_work_sync(&dev_priv->rps.sw_turbo.work_max_freq);
+		atomic_set(&dev_priv->rps.sw_turbo.flip_received, false);
+       }

- Daisy

On 9/5/2014 6:00 AM, Paulo Zanoni wrote:
> (adding Daisy Sun to the conversation)
>
> 2014-09-04 18:07 GMT-03:00 Paulo Zanoni <przanoni@gmail.com>:
>> From: Paulo Zanoni <paulo.r.zanoni@intel.com>
>>
>> If we don't cancel them, we may end up running them while the device
>> is runtime suspended, which will trigger lots and lots of WARNs on
>> dmesg.
>>
>> Regression introduced by:
>> commit c76bb61a71083b2d90504cc6d0dda2047c5d63ca
>> Author: Daisy Sun <daisy.sun@intel.com>
>> Date:   Mon Aug 11 11:08:38 2014 -0700
>>      drm/i915/bdw: BDW Software Turbo
>>
>> Testcase: igt/pm_rpm/gem-execbuf (you may have to run it a few times)
>> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
>> ---
>>   drivers/gpu/drm/i915/i915_drv.c | 4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
>> index 8ff3755..4ce217b 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.c
>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>> @@ -1448,6 +1448,10 @@ static int intel_runtime_suspend(struct device *device)
>>           * intel_mark_idle().
>>           */
>>          cancel_work_sync(&dev_priv->rps.work);
>> +       if (dev_priv->rps.is_bdw_sw_turbo) {
>> +               del_timer_sync(&dev_priv->rps.sw_turbo.flip_timer);
>> +               cancel_work_sync(&dev_priv->rps.sw_turbo.work_max_freq);
>> +       }
>>          intel_runtime_pm_disable_interrupts(dev);
>>
>>          ret = intel_suspend_complete(dev_priv);
>> --
>> 2.1.0
>>
>
>