Hi Tom, The attached patch should be able to fix this issue. Best Regards Rex -----Original Message----- From: StDenis, Tom Sent: Friday, February 02, 2018 2:58 AM To: Deucher, Alexander; amd-gfx mailing list Cc: Zhu, Rex; Lazare, Jordan; Wentland, Harry Subject: Re: MCLK defaults high on second card 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 >> _______________________________________________ >> amd-gfx mailing list >> amd-gfx at lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/amd-gfx > -------------- next part -------------- An embedded message was scrubbed... From: Rex Zhu <Rex.Zhu@xxxxxxx> Subject: [PATCH] drm/amd/pp: fix mclk fixed in high when no display connected Date: Fri, 2 Feb 2018 12:52:59 +0800 Size: 20114 URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20180202/b691fdb0/attachment-0001.mht>
