[PATCH 1/2] drm/amdgpu: skip SMU FW reloading in runpm BACO case (v2)

[Guchun Chen]

SMU is always alive, so it's fine to skip SMU FW reloading
when runpm resumed from BACO, this can avoid some race issues
when resuming SMU FW.

v2: Exclude boco case if an ASIC supports both boco and baco

Suggested-by: Evan Quan <evan.quan at amd.com>
Signed-off-by: Guchun Chen <guchun.chen at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index e9411c28d88b..de59dc051340 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -2348,6 +2348,14 @@ static int psp_load_smu_fw(struct psp_context *psp)
 			&adev->firmware.ucode[AMDGPU_UCODE_ID_SMC];
 	struct amdgpu_ras *ras = psp->ras_context.ras;
 
+	/* Skip SMU FW reloading in case of using BACO for runpm only,
+	 * as SMU is always alive.
+	 */
+	if (adev->in_runpm &&
+	    !amdgpu_device_supports_boco(adev_to_drm(adev)) &&
+	    amdgpu_device_supports_baco(adev_to_drm(adev)))
+		return 0;
+
 	if (!ucode->fw || amdgpu_sriov_vf(psp->adev))
 		return 0;
 
-- 
2.17.1