MCLK defaults high on second card

[Tom St Denis]

On 01/02/18 01:54 PM, Deucher, Alexander wrote:
> Does it also work properly with dc disabled?  I suspect a bug somewhere 
> in the display info that dc generated when no displays are attached.  
> See smu7_program_display_gap().

Yup, with dc=0 the clock is correctly set.

I'll take a peak (tomorrow) but I suspect it'll probably be more 
fruitful to hand it over to the display team.

Thanks,
Tom

> 
> 
> Alex
> 
> ------------------------------------------------------------------------
> *From:* StDenis, Tom
> *Sent:* Thursday, February 1, 2018 1:43 PM
> *To:* Deucher, Alexander; amd-gfx mailing list
> *Cc:* Zhu, Rex
> *Subject:* Re: MCLK defaults high on second card
> 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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>