[Bug 96326] Heavy screen flickering in OpenGL apps on R9 390

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96326

            Bug ID: 96326
           Summary: Heavy screen flickering in OpenGL apps on R9 390
           Product: Mesa
           Version: git
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: 0xe2.0x9a.0x9b at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

GPU: R9 390
GPU manufacturer: Gigabyte
Kernel: 4.5, 4.6, etc
Firmware: both hawaii_smc.bin and hawaii_k_smc.bin

Hello,

I am experiencing heavy LCD screen flickering in OpenGL apps when automatic GPU
power management is enabled.

The flickering is related to mclk transitions. Forcing mclk=1.5GHz, and letting
sclk be controlled by DPM, removes the flickering.

Related issues:
http://bugs.freedesktop.org/show_bug.cgi?id=91880
http://bugs.freedesktop.org/show_bug.cgi?id=92302

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