[Intel-gfx] [PATCH 06/19] drm/i915: do adapter power state notification at runtime PM

[Rodrigo Vivi]

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>

(resent with correct smtp)

On Fri, Nov 29, 2013 at 10:56 AM, Rodrigo Vivi <rodrigo.vivi at gmail.com> wrote:
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
>
> On Wed, Nov 27, 2013 at 06:13:44PM -0200, Paulo Zanoni wrote:
>> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
>>
>> Now that we are actually setting the device to the D3 state, we should
>> issue the notification.
>>
>> The opregion spec says we should send the message before the adapter
>> is about to be placed in a lower power state, and after the adapter is
>> placed in a higher power state.
>>
>> Jani originally wrote a similar patch for PC8, but then we discovered
>> that we were not really changing the PCI D states when
>> enabling/disabling PC8, so we had to postpone his patch.
>>
>> v2: - Improve commit message, explaining the expected state.
>>
>> Cc: Jani Nikula <jani.nikula at intel.com>
>> Credits-to: Jani Nikula <jani.nikula at intel.com>
>> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
>> ---
>>  drivers/gpu/drm/i915/i915_drv.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
>> index d5310a0..6b92929 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.c
>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>> @@ -918,6 +918,7 @@ static int i915_runtime_suspend(struct device *device)
>>
>>       dev_priv->pm.suspended = true;
>>
>> +     intel_opregion_notify_adapter(dev, PCI_D3cold);
>>       pci_save_state(pdev);
>>       pci_set_power_state(pdev, PCI_D3cold);
>>
>> @@ -936,6 +937,7 @@ static int i915_runtime_resume(struct device *device)
>>
>>       pci_set_power_state(pdev, PCI_D0);
>>       pci_restore_state(pdev);
>> +     intel_opregion_notify_adapter(dev, PCI_D0);
>>
>>       dev_priv->pm.suspended = false;
>>
>> --
>> 1.8.3.1
>>
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-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br