drm/amd/powerplay: expose max engine and memory clock info for powerplay enabled case

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I don't know if we need to add a cgs call to fill in the max_clock_voltage_limits structure.  That's mostly just leftover from radeon.  A better solution would be use the existing amdgpu_dpm_get_sclk and amdgpu_dpm_get_mclk macros.  Maybe something like the attached patch? Unless there is a specific need for the max clocks on AC.  I think in most cases the results will be the same.

Alex

From: amd-gfx [mailto:amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Quan, Evan
Sent: Wednesday, October 12, 2016 1:53 AM
To: amd-gfx at lists.freedesktop.org
Cc: Zhang, Jerry; Huan, Alvin; Quan, Evan; Huang, Ray
Subject: drm/amd/powerplay: expose max engine and memory clock info for powerplay enabled case

Hi All,

We found the max engine clock and max memory clock are both wrongly reported as 0(by AMDGPU_INFO_DEV_INFO ioctl).
The attached patch tries to fix it.
Please help to review it.
Any comment is welcomed.

Regards,
Evan
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