[PATCH] drm/amd/powerplay: update cached feature enablement status

[Kevin Wang]

Hi Evan,

this is know issue for me.
i think we should add update feature mask cached operation into 
smu_feature_update_enable_state function.

Best Regards,
Kevin

On 8/21/19 5:24 PM, Evan Quan wrote:
> Need to update in cache feature enablement status after pp_feature
> settings. Another fix for the commit below:
> drm/amd/powerplay: implment sysfs feature status function in smu
>
> Change-Id: I90e29b0d839df26825d5993212f6097c7ad4bebf
> Signed-off-by: Evan Quan <evan.quan at amd.com>
> ---
>   drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
> index c663d25db5ab..04867cafb322 100644
> --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
> @@ -96,11 +96,13 @@ size_t smu_sys_get_pp_feature_mask(struct smu_context *smu, char *buf)
>   
>   int smu_sys_set_pp_feature_mask(struct smu_context *smu, uint64_t new_mask)
>   {
> +	struct smu_feature *feature = &smu->smu_feature;
>   	int ret = 0;
>   	uint32_t feature_mask[2] = { 0 };
>   	uint64_t feature_2_enabled = 0;
>   	uint64_t feature_2_disabled = 0;
>   	uint64_t feature_enables = 0;
> +	uint64_t feature_id;
>   
>   	ret = smu_feature_get_enabled_mask(smu, feature_mask, 2);
>   	if (ret)
> @@ -115,11 +117,25 @@ int smu_sys_set_pp_feature_mask(struct smu_context *smu, uint64_t new_mask)
>   		ret = smu_feature_update_enable_state(smu, feature_2_enabled, true);
>   		if (ret)
>   			return ret;
> +
> +		mutex_lock(&feature->mutex);
> +		for (feature_id = 0; feature_id < 64; feature_id++) {
> +			if (feature_2_enabled & (1ULL << feature_id))
> +				test_and_set_bit(feature_id, feature->enabled);
> +		}
> +		mutex_unlock(&feature->mutex);
>   	}
>   	if (feature_2_disabled) {
>   		ret = smu_feature_update_enable_state(smu, feature_2_disabled, false);
>   		if (ret)
>   			return ret;
> +
> +		mutex_lock(&feature->mutex);
> +		for (feature_id = 0; feature_id < 64; feature_id++) {
> +			if (feature_2_disabled & (1ULL << feature_id))
> +				test_and_clear_bit(feature_id, feature->enabled);
> +		}
> +		mutex_unlock(&feature->mutex);
>   	}
>   
>   	return ret;