[PATCH] drm/radeon/atom: powergating fixes for DCE6

[Alex Deucher]

On Tue, Aug 28, 2012 at 3:03 AM, Paul Menzel
<paulepanter at users.sourceforge.net> wrote:
> Dear Alex,
>
>
> Am Montag, den 27.08.2012, 16:25 -0400 schrieb alexdeucher at gmail.com:
>> From: Alex Deucher <alexander.deucher at amd.com>
>>
>> Power gating is per crtc pair, but the powergating registers
>> should be called individually.  The hw handles power up/down
>> properly.  The pair is powered up if either crtc in the pair
>> is powered up and the pair is not powered down until both
>> crtcs in the pair are powered down.  This simplifies
>> programming and should save power additional power.
>
> it would be nice, if you could provide some numbers if the last
> statement is true.

I haven't checked to see how much it saves but the way the previous
code worked the pair never actually got power gated.

Alex

>
>> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
>> Cc: stable at vger.kernel.org
>>
>> ---
>>  drivers/gpu/drm/radeon/atombios_crtc.c |   22 ++--------------------
>>  1 files changed, 2 insertions(+), 20 deletions(-)
>
> […]
>
> Acked-by: Paul Menzel <paulepanter at users.sourceforge.net>
>
>
> Thanks,
>
> Paul