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drm/amdgpu: Use discovery table's subrevision

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Use subrevision of IP version in discovery table to identify SOC
revision id for NBIO v7.9 SOCs. Only newer bootloaders update
subrevision field.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar 2023-10-12 15:09:38 +05:30 committed by Alex Deucher
parent ae8cffe353
commit dd2687f5d9
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
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@ -56,8 +56,15 @@ static u32 nbio_v7_9_get_rev_id(struct amdgpu_device *adev)
{
u32 tmp;
tmp = IP_VERSION_SUBREV(amdgpu_ip_version_full(adev, NBIO_HWIP, 0));
/* If it is VF or subrevision holds a non-zero value, that should be used */
if (tmp || amdgpu_sriov_vf(adev))
return tmp;
/* If discovery subrev is not updated, use register version */
tmp = RREG32_SOC15(NBIO, 0, regRCC_STRAP0_RCC_DEV0_EPF0_STRAP0);
tmp = REG_GET_FIELD(tmp, RCC_STRAP0_RCC_DEV0_EPF0_STRAP0, STRAP_ATI_REV_ID_DEV0_F0);
tmp = REG_GET_FIELD(tmp, RCC_STRAP0_RCC_DEV0_EPF0_STRAP0,
STRAP_ATI_REV_ID_DEV0_F0);
return tmp;
}