[PATCH] drm/amdgpu/powerplay: Apply avfs cks-off voltages on Polaris30

[Kenneth Feng]

Instead of EVV cks-off voltages, avfs cks-off voltages can avoid
the overshoot voltages when switching sclk.

Signed-off-by: Kenneth Feng <kenneth.feng at amd.com>
---
 drivers/gpu/drm/amd/powerplay/inc/smu7_ppsmc.h          | 2 ++
 drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/inc/smu7_ppsmc.h b/drivers/gpu/drm/amd/powerplay/inc/smu7_ppsmc.h
index 62f36ba..c1a99df 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/smu7_ppsmc.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/smu7_ppsmc.h
@@ -386,6 +386,8 @@ typedef uint16_t PPSMC_Result;
 #define PPSMC_MSG_AgmResetPsm                 ((uint16_t) 0x403)
 #define PPSMC_MSG_ReadVftCell                 ((uint16_t) 0x404)
 
+#define PPSMC_MSG_ApplyAvfsCksOffVoltage      ((uint16_t) 0x415)
+
 #define PPSMC_MSG_GFX_CU_PG_ENABLE            ((uint16_t) 0x280)
 #define PPSMC_MSG_GFX_CU_PG_DISABLE           ((uint16_t) 0x281)
 #define PPSMC_MSG_GetCurrPkgPwr               ((uint16_t) 0x282)
diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c b/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
index 94898b2..6012dbf 100644
--- a/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
@@ -1988,6 +1988,7 @@ static int polaris10_program_mem_timing_parameters(struct pp_hwmgr *hwmgr)
 int polaris10_thermal_avfs_enable(struct pp_hwmgr *hwmgr)
 {
 	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
+	struct amdgpu_device *adev = (struct amdgpu_device *)hwmgr->adev;
 
 	if (!hwmgr->avfs_supported)
 		return 0;
@@ -1997,6 +1998,14 @@ int polaris10_thermal_avfs_enable(struct pp_hwmgr *hwmgr)
 
 	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_EnableAvfs);
 
+	/* P30 case for applying Avfs cks-off voltages to avoid the overshoot
+	 * when switching to the highest sclk frequency
+	 */
+	if ((adev->pdev->device == 0x67df) &&
+		((adev->pdev->revision == 0xe1) ||
+		(adev->pdev->revision == 0xf7)))
+		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ApplyAvfsCksOffVoltage);
+
 	return 0;
 }
 
-- 
2.7.4