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drm/amd/pp: Fix bug that dpm level was not really locked 

Lock the dpm levels when we use SW method to modify
the dpm tables directly to avoid a possible race
with the smu.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2018-02-09 16:47:53 +08:00 committed by Alex Deucher
parent 952e5daa25
commit a02497b732
1 changed files with 14 additions and 8 deletions
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22
drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
View File

@ -4650,20 +4650,26 @@ static int smu7_set_power_profile_state(struct pp_hwmgr *hwmgr,
if (hwmgr->dpm_level != AMD_DPM_FORCED_LEVEL_AUTO)
return -EINVAL;
tmp_result = smu7_freeze_sclk_mclk_dpm(hwmgr);
PP_ASSERT_WITH_CODE(!tmp_result,
"Failed to freeze SCLK MCLK DPM!",
result = tmp_result);
if (smum_is_dpm_running(hwmgr)) {
if (!data->sclk_dpm_key_disabled)
smum_send_msg_to_smc(hwmgr, PPSMC_MSG_SCLKDPM_FreezeLevel);
if (!data->mclk_dpm_key_disabled)
smum_send_msg_to_smc(hwmgr, PPSMC_MSG_MCLKDPM_FreezeLevel);
}
tmp_result = smum_populate_requested_graphic_levels(hwmgr, request);
PP_ASSERT_WITH_CODE(!tmp_result,
"Failed to populate requested graphic levels!",
result = tmp_result);
tmp_result = smu7_unfreeze_sclk_mclk_dpm(hwmgr);
PP_ASSERT_WITH_CODE(!tmp_result,
"Failed to unfreeze SCLK MCLK DPM!",
result = tmp_result);
if (smum_is_dpm_running(hwmgr)) {
if (!data->sclk_dpm_key_disabled)
smum_send_msg_to_smc(hwmgr, PPSMC_MSG_SCLKDPM_UnfreezeLevel);
if (!data->mclk_dpm_key_disabled)
smum_send_msg_to_smc(hwmgr, PPSMC_MSG_MCLKDPM_UnfreezeLevel);
}
smu7_find_min_clock_masks(hwmgr, &sclk_mask, &mclk_mask,
request->min_sclk, request->min_mclk);