Comment # 8
on bug 96326
from Jan Ziak
(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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