Re: [PATCH 2/5] drm/amd/pm: skip to load smu microcode on sriov for aldebaran

["Lazar, Lijo" <lijo.lazar@amd.com>]

On 8/11/2021 2:03 PM, Kevin Wang wrote:
> 1. skip to load smu firmware in sriov mode for aldebaran chip
> 2. using vbios pptable if in sriov mode.
> 
> Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
> ---
>   .../gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c    | 66 ++++++++++---------
>   1 file changed, 36 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
> index a421ba85bd6d..a0ca7e7a0903 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
> @@ -85,6 +85,10 @@ int smu_v13_0_init_microcode(struct smu_context *smu)
>   	const struct common_firmware_header *header;
>   	struct amdgpu_firmware_info *ucode = NULL;
>   
> +	/* doesn't need to load smu firmware in IOV mode */
> +	if (amdgpu_sriov_vf(adev))
> +		return 0;
> +
>   	switch (adev->asic_type) {
>   	case CHIP_ALDEBARAN:
>   		chip_name = "aldebaran";
> @@ -279,41 +283,43 @@ int smu_v13_0_setup_pptable(struct smu_context *smu)
>   	void *table;
>   	uint16_t version_major, version_minor;
>   
> +	if (!amdgpu_sriov_vf(adev)) {
> +		if (amdgpu_smu_pptable_id >= 0) {
> +			smu->smu_table.boot_values.pp_table_id = amdgpu_smu_pptable_id;
> +			dev_info(adev->dev, "override pptable id %d\n", amdgpu_smu_pptable_id);
> +		}

Easier to read without goto if we keep like
	if (amdgpu_sriov_vf(dev))
		pptable_id = 0 ; // Force load from VBIOS
	else
		pptable_id = smu->smu_table.boot_values.pp_table_id;

Thanks,
Lijo

> -	if (amdgpu_smu_pptable_id >= 0) {
> -		smu->smu_table.boot_values.pp_table_id = amdgpu_smu_pptable_id;
> -		dev_info(adev->dev, "override pptable id %d\n", amdgpu_smu_pptable_id);
> -	}
> -
> -	hdr = (const struct smc_firmware_header_v1_0 *) adev->pm.fw->data;
> -	version_major = le16_to_cpu(hdr->header.header_version_major);
> -	version_minor = le16_to_cpu(hdr->header.header_version_minor);
> -	if (version_major == 2 && smu->smu_table.boot_values.pp_table_id > 0) {
> -		dev_info(adev->dev, "use driver provided pptable %d\n", smu->smu_table.boot_values.pp_table_id);
> -		switch (version_minor) {
> -		case 1:
> -			ret = smu_v13_0_set_pptable_v2_1(smu, &table, &size,
> -							 smu->smu_table.boot_values.pp_table_id);
> -			break;
> -		default:
> -			ret = -EINVAL;
> -			break;
> +		hdr = (const struct smc_firmware_header_v1_0 *) adev->pm.fw->data;
> +		version_major = le16_to_cpu(hdr->header.header_version_major);
> +		version_minor = le16_to_cpu(hdr->header.header_version_minor);
> +		if (version_major == 2 && smu->smu_table.boot_values.pp_table_id > 0) {
> +			dev_info(adev->dev, "use driver provided pptable %d\n", smu->smu_table.boot_values.pp_table_id);
> +			switch (version_minor) {
> +			case 1:
> +				ret = smu_v13_0_set_pptable_v2_1(smu, &table, &size,
> +								 smu->smu_table.boot_values.pp_table_id);
> +				break;
> +			default:
> +				ret = -EINVAL;
> +				break;
> +			}
> +			if (ret)
> +				return ret;
> +			goto out;
>   		}
> -		if (ret)
> -			return ret;
> +	}
>   
> -	} else {
> -		dev_info(adev->dev, "use vbios provided pptable\n");
> -		index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
> -						    powerplayinfo);
> +	dev_info(adev->dev, "use vbios provided pptable\n");
> +	index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
> +					    powerplayinfo);
>   
> -		ret = amdgpu_atombios_get_data_table(adev, index, &atom_table_size, &frev, &crev,
> -						     (uint8_t **)&table);
> -		if (ret)
> -			return ret;
> -		size = atom_table_size;
> -	}
> +	ret = amdgpu_atombios_get_data_table(adev, index, &atom_table_size, &frev, &crev,
> +					     (uint8_t **)&table);
> +	if (ret)
> +		return ret;
>   
> +	size = atom_table_size;
> +out:
>   	if (!smu->smu_table.power_play_table)
>   		smu->smu_table.power_play_table = table;
>   	if (!smu->smu_table.power_play_table_size)
>