From: Guchun Chen guchun.chen@amd.com
[ Upstream commit 6dca7efe6e522bf213c7dab691fa580d82f48f74 ]
Return true early if ASIC is in BACO state already, no need to talk to SMU. It can fix the issue that driver was not calling BACO exit at all in runtime pm resume, and a timing issue leading to a PCI AER error happened eventually.
Fixes: 8795e182b02d ("PCI/portdrv: Don't disable AER reporting in get_port_device_capability()") Suggested-by: Lijo Lazar lijo.lazar@amd.com Signed-off-by: Guchun Chen guchun.chen@amd.com Reviewed-by: Lijo Lazar lijo.lazar@amd.com Reviewed-by: Evan Quan evan.quan@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c index 70b560737687..ad5f6a15a1d7 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c @@ -1588,6 +1588,10 @@ bool smu_v11_0_baco_is_support(struct smu_context *smu) if (amdgpu_sriov_vf(smu->adev) || !smu_baco->platform_support) return false;
+ /* return true if ASIC is in BACO state already */ + if (smu_v11_0_baco_get_state(smu) == SMU_BACO_STATE_ENTER) + return true; + /* Arcturus does not support this bit mask */ if (smu_cmn_feature_is_supported(smu, SMU_FEATURE_BACO_BIT) && !smu_cmn_feature_is_enabled(smu, SMU_FEATURE_BACO_BIT))