On Thu, Dec 6, 2018 at 1:12 AM Kenneth Feng <kenneth.feng@xxxxxxx> wrote:
>
> 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@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> 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
>
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