[PATCH 4.19 38/44] drm/amdgpu/powerplay: Apply avfs cks-off voltages on VI

Greg Kroah-Hartman
2018-12-18T16:43:26Z

From: Kenneth Feng <kenneth.feng@amd.com>

commit cf4197ed5796234a53beb71228198c7d1e678947 upstream.

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@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
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(+)

--- 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)
--- a/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c
@@ -1984,6 +1984,12 @@ int polaris10_thermal_avfs_enable(struct

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;
}