MCLK defaults high on second card

[Tom St Denis]

On 01/02/18 01:36 PM, Deucher, Alexander wrote:
> Are there any displays attached to the secondary card with the mclks 
> stuck high?  If not, does attaching a display help?

Stealing the display from my primary (CZ in this case) does help, and 
then putting it back the MCLK remains low.

Tom

> 
> 
> Alex
> 
> ------------------------------------------------------------------------
> *From:* amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Tom 
> St Denis <tom.stdenis at amd.com>
> *Sent:* Thursday, February 1, 2018 1:14:43 PM
> *To:* amd-gfx mailing list
> *Cc:* Zhu, Rex
> *Subject:* MCLK defaults high on second card
> Hi,
> 
> I have a setup with a CZ + Polaris10 and on the Polaris10 the SCLK idles
> low and the MCLK stays in the 2nd state (1750MHz) but on my Workstation
> which has a single 560 in it the card idles at 300MHz (with the stock
> FC27 kernel).
> 
> Is there an issue with non-primary cards idling properly?
> 
> Doing
> 
> echo 0 > /sys/devices/pci0000:00/0000:00:03.1/0000:21:00.0/pp_dpm_mclk
> 
> Doesn't result in low clock rates either.
> 
> Tom
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