Bug 99476

Summary: Forcing perf level to high doesn't change memory clock
Product: DRI Reporter: Samuel Pitoiset <samuel.pitoiset>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: All   
See Also: https://bugs.freedesktop.org/show_bug.cgi?id=99718
Whiteboard:
i915 platform: i915 features:

Description Samuel Pitoiset 2017-01-20 15:10:18 UTC 
Hi,

After changing the current performance level with:

echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level

only the shader clock is updated but not the memory clock.

# cat /sys/kernel/debug/dri/0/amdgpu_pm_info

 [  mclk  ]: 300 MHz

 [  sclk  ]: 1306 MHz

# cat /sys/class/drm/card0/device/pp_dpm_sclk 
0: 300Mhz 
1: 608Mhz 
2: 910Mhz 
3: 1077Mhz 
4: 1145Mhz 
5: 1191Mhz 
6: 1236Mhz 
7: 1306Mhz *

# cat /sys/class/drm/card0/device/pp_dpm_mclk 
0: 300Mhz *
1: 1750Mhz 

Same issue if I choose the manual mode and try to echo 1 in pp_dpm_mclk.

Tested on Linux 4.8 with RX480.

Thanks!
Comment 1 Alex Deucher 2017-02-09 17:10:30 UTC 
Does the firmware here help?
https://people.freedesktop.org/~agd5f/radeon_ucode/polaris/
Comment 2 Samuel Pitoiset 2017-02-10 17:59:37 UTC 
This is fixed in amd-staging-4.9. I didn't test the firmwares. Looks good now.

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