[PATCH v2] drm/amdgpu/powerplay: Apply avfs cks-off voltages on VI

[Deucher, Alexander]

Acked-by: Alex Deucher <alexander.deucher at amd.com>

________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Kenneth Feng <kenneth.feng at amd.com>
Sent: Friday, December 7, 2018 1:13:20 AM
To: amd-gfx at lists.freedesktop.org
Cc: Feng, Kenneth
Subject: [PATCH v2] drm/amdgpu/powerplay: Apply avfs cks-off voltages on VI

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 | 6 ++++++
 2 files changed, 8 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..d2b97aa 100644
--- a/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
@@ -1997,6 +1997,12 @@ int polaris10_thermal_avfs_enable(struct pp_hwmgr *hwmgr)

         smum_send_msg_to_smc(hwmgr, PPSMC_MSG_EnableAvfs);

+       /* Apply avfs cks-off voltages to avoid the overshoot
+        * when switching to the highest sclk frequency
+        */
+       if (data->apply_avfs_cks_off_voltage)
+               smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ApplyAvfsCksOffVoltage);
+
         return 0;
 }

--
2.7.4

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