https://bugs.freedesktop.org/show_bug.cgi?id=96326
--- Comment #8 from Jan Ziak <0xe2.0x9a.0x9b at gmail.com> ---
(In reply to Alex Deucher from comment #7)
> (In reply to Jan Ziak from comment #6)
> > (In reply to Alex Deucher from comment #3)
> > > Please attach your xorg log and dmesg output.
> >
> > Upstream Linux kernel does not support variable mclk on R9 390. I enabled
> > variable mclk by patching some code in drivers/gpu/drm/amd/amdgpu/ (mostly
> > ci_dpm.c).
>
> What patch(es) did you use?
I added a function based on ci_dpm_force_state_mclk() in ci_dpm.c.
mask is 0x3.
----
static int ci_dpm_force_state_mclk_mask(struct amdgpu_device *adev, u32 mask) {
struct ci_power_info *pi = ci_get_pi(adev);
if (!pi->mclk_dpm_key_disabled) {
PPSMC_Result smc_result =
amdgpu_ci_send_msg_to_smc_with_parameter(adev,
PPSMC_MSG_MCLKDPM_SetEnabledMask, mask);
printk("[atomsymbol] %s:%d: mask=0x%X, ok=%d\n", __FUNCTION__,
__LINE__, mask, smc_result == PPSMC_Result_OK);
if (smc_result != PPSMC_Result_OK)
return -EINVAL;
}
return 0;
}
----
/sys/class/drm/card?/device/power_dpm_force_performance_level is set to "auto".
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