[PATCH 47/52] drm/amd/powerplay: Disable Spread Spectrum on DPM 0 on baffin as SPLL Shut Down feature is enabled.

[Alex Deucher]

From: Rex Zhu <Rex.Zhu at amd.com>

Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
Acked-by: Flora Cui <Flora.Cui at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c | 6 ++++++
 drivers/gpu/drm/amd/powerplay/inc/hardwaremanager.h   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
index b77d7aa..715bc3d 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
@@ -1248,6 +1248,9 @@ static int polaris10_populate_all_graphic_levels(struct pp_hwmgr *hwmgr)
 		if (i > 1)
 			levels[i].DeepSleepDivId = 0;
 	}
+	if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
+					PHM_PlatformCaps_SPLLShutdownSupport))
+		data->smc_state_table.GraphicsLevel[0].SclkSetting.SSc_En = 0;
 
 	data->smc_state_table.GraphicsLevel[0].EnabledForActivity = 1;
 	data->smc_state_table.GraphicsDpmLevelCount =
@@ -2602,6 +2605,9 @@ int polaris10_set_features_platform_caps(struct pp_hwmgr *hwmgr)
 	phm_cap_unset(hwmgr->platform_descriptor.platformCaps,
 						PHM_PlatformCaps_TCPRamping);
 
+	if (hwmgr->chip_id == CHIP_POLARIS11)
+		phm_cap_set(hwmgr->platform_descriptor.platformCaps,
+					PHM_PlatformCaps_SPLLShutdownSupport);
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/amd/powerplay/inc/hardwaremanager.h b/drivers/gpu/drm/amd/powerplay/inc/hardwaremanager.h
index 040d3f7..56f712c 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/hardwaremanager.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hardwaremanager.h
@@ -211,6 +211,7 @@ enum phm_platform_caps {
 	PHM_PlatformCaps_ClockStretcher,
 	PHM_PlatformCaps_TablelessHardwareInterface,
 	PHM_PlatformCaps_EnableDriverEVV,
+	PHM_PlatformCaps_SPLLShutdownSupport,
 	PHM_PlatformCaps_Max
 };
 
-- 
2.5.0