drm/amd/powerplay: add registry key to disable ACG

For the dummy ACG fuses,need to disable ACG, otherwise
corruption will be caused.

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c
index 7fa1ba89ac54..888ddca902d8 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c
@@ -224,6 +224,11 @@ static int append_vbios_pptable(struct pp_hwmgr *hwmgr, PPTable_t *ppsmc_pptable
         ppsmc_pptable->AcgGfxclkSpreadPercent = smc_dpm_table.acggfxclkspreadpercent;
         ppsmc_pptable->AcgGfxclkSpreadFreq = smc_dpm_table.acggfxclkspreadfreq;
 
+        /* 0xFFFF will disable the ACG feature */
+        if (!(hwmgr->feature_mask & PP_ACG_MASK)) {
+                ppsmc_pptable->AcgThresholdFreqHigh = 0xFFFF;
+                ppsmc_pptable->AcgThresholdFreqLow = 0xFFFF;
+        }
 
         return 0;
 }
diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
index 9b3dd7dce4e2..2f203ec3d19c 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
@@ -82,6 +82,7 @@ enum PP_FEATURE_MASK {
         PP_SOCCLK_DPM_MASK = 0x1000,
         PP_DCEFCLK_DPM_MASK = 0x2000,
         PP_OVERDRIVE_MASK = 0x4000,
+        PP_ACG_MASK = 0x10000,
 };
 
 enum PHM_BackEnd_Magic {