[PATCH v2] drm/amd/powerplay: add registry key to disable ACG

[Huang Rui]

On Fri, Apr 20, 2018 at 02:24:49PM +0800, Kenneth Feng wrote:
> For the dummy ACG fuses,need to disable ACG, otherwise
> corruption will be caused.
> 
> Change-Id: Ic32b138720cada2de510cbda607c681ad409e748
> Signed-off-by: Kenneth Feng <kenneth.feng at amd.com>

Reviewed-by: Huang Rui <ray.huang at amd.com>

> ---
>  drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c | 5 +++++
>  drivers/gpu/drm/amd/powerplay/inc/hwmgr.h                    | 1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c
> index 7fa1ba8..888ddca 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_processpptables.c
> @@ -224,6 +224,11 @@ static int append_vbios_pptable(struct pp_hwmgr *hwmgr, PPTable_t *ppsmc_pptable
>  	ppsmc_pptable->AcgGfxclkSpreadPercent = smc_dpm_table.acggfxclkspreadpercent;
>  	ppsmc_pptable->AcgGfxclkSpreadFreq = smc_dpm_table.acggfxclkspreadfreq;
>  
> +	/* 0xFFFF will disable the ACG feature */
> +	if (!(hwmgr->feature_mask & PP_ACG_MASK)) {
> +		ppsmc_pptable->AcgThresholdFreqHigh = 0xFFFF;
> +		ppsmc_pptable->AcgThresholdFreqLow = 0xFFFF;
> +	}
>  
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
> index 9b3dd7d..2f203ec 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
> @@ -82,6 +82,7 @@ enum PP_FEATURE_MASK {
>  	PP_SOCCLK_DPM_MASK = 0x1000,
>  	PP_DCEFCLK_DPM_MASK = 0x2000,
>  	PP_OVERDRIVE_MASK = 0x4000,
> +	PP_ACG_MASK = 0x10000,
>  };
>  
>  enum PHM_BackEnd_Magic {
> -- 
> 2.7.4
> 
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