Question about ALPM, HIPM and DIPM

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* Question about ALPM, HIPM and DIPM
@ 2009-04-16  3:03 Edward Shao
  2009-04-20  7:44 ` Tejun Heo
  0 siblings, 1 reply; 2+ messages in thread
From: Edward Shao @ 2009-04-16  3:03 UTC (permalink / raw)
  To: linux-ide

Hi~folks,

I'm wondering about AHCI ALPM, SATA HIPM and DIPM.

* ALPM is HIPM for AHCI?
* If ALPM is enabled but SATA HDD does not support HIPM (only DIPM),
ALPM is effective?

Thanks you very much.

Best Regards,
Edward

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: Question about ALPM, HIPM and DIPM
  2009-04-16  3:03 Question about ALPM, HIPM and DIPM Edward Shao
@ 2009-04-20  7:44 ` Tejun Heo
  0 siblings, 0 replies; 2+ messages in thread
From: Tejun Heo @ 2009-04-20  7:44 UTC (permalink / raw)
  To: Edward Shao; +Cc: linux-ide

Edward Shao wrote:
> Hi~folks,
> 
> I'm wondering about AHCI ALPM, SATA HIPM and DIPM.
> 
> * ALPM is HIPM for AHCI?

ALPM uses HIPM but there are other ways to achieve HIPM too (via
SControl).

> * If ALPM is enabled but SATA HDD does not support HIPM (only DIPM),
> ALPM is effective?

Nope.

-- 
tejun

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2009-04-16  3:03 Question about ALPM, HIPM and DIPM Edward Shao
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