RV630 KMS PM info on tables requested

Alex Deucher alexdeucher at gmail.com
Tue Apr 27 11:06:41 PDT 2010


On Tue, Apr 27, 2010 at 1:53 PM, Klaus Doblmann B.A.
<klaus.doblmann at gmail.com> wrote:
> On Tue, 27 Apr 2010 13:42:05 -0400
> Alex Deucher <alexdeucher at gmail.com> wrote:
>
>> On Tue, Apr 27, 2010 at 5:35 AM, Klaus Doblmann B.A.
>> <klaus.doblmann at gmail.com> wrote:
>> >
>> > I sent this to Alex a few days ago but felt I should post it on this
>> > list as well:
>> >
>>
>> You might want to check the address you used as I never got the email.
>
> Hi Alex,
> weird, I double-checked and I sent it to the address you replied from...
>
>>
>> > I've been testing radeon KMS PM with 2.6.34-rc* for a few days now and
>> > I wanted to send you my testcase. Even though PM is enabled, the
>> > defaults of my card are somewhat insane so no real powermanagement
>> > takes place - i.e. the card doesn't get clocked down. is there any way
>> > to force the card to use a different setting where less power is being
>> > consumed?
>>
>> The current code doesn't handle a lot of cases properly.  Please try
>> my latest patch set against Dave's drm-next tree:
>> http://people.freedesktop.org/~agd5f/pm3/
>> It allows you to enable dynamic pm or force a static power mode via sysfs.
>>
>> Alex
>
> Will do so at the end of the week when (hopefully) 2.6.34-rc6 is out
> and I have mor etime on my hands.
> Could you a bit more explicit on how I could set a static power mode
> via sysfs? I've never worked with sysfs before so some hints would be
> greatly appreciated.

enable/disable dynpm:
echo 1 > /sys/class/drm/card0/device/dynpm

force a static power state:
echo 1.0 > /sys/class/drm/card0/device/power_state

Alex

>
> Thanks,
> Klaus
>
> PS: On another note, is the KMS PM code supposed to work with r100
> chips (Mobility 7500)? I've tried it yesterday and the machine (IBM
> T40) hardlocks when loading GDM (Ubuntu 10.04, 2.6.34-rc5 without any
> additional patches).
>

In theory, although I haven't had time to test older chips much yet.

Alex

>>
>> > Thanks!
>> >
>> > Klaus
>> >
> [...]
>
> --
> Klaus Doblmann B.A. - http://straightrazorguy.net - FSF member #7570
> PGP-Key: http://www.doblmann.de/pgp_key.asc
>
> A: Because it messes up the order in which people normally read text.
>   See http://en.wikipedia.org/wiki/Posting_style
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?
>


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