From: Tim Huang <Tim.Huang@xxxxxxx>
While doing multiple S4 stress tests, GC/RLC/PMFW get into
an invalid state resulting into hard hangs.
Adding a GFX reset as workaround just before sending the
MP1_UNLOAD message avoids this failure.
Signed-off-by: Tim Huang <Tim.Huang@xxxxxxx>
---
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c
index e8119918ef6b..88f1a0d878f3 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c
@@ -226,8 +226,18 @@ static int smu_v13_0_4_system_features_control(struct smu_context *smu, bool en)
struct amdgpu_device *adev = smu->adev;
int ret = 0;
- if (!en && !adev->in_s0ix)
+ if (!en && !adev->in_s0ix) {
+ /* Adds a GFX reset as workaround just before sending the
+ * MP1_UNLOAD message to prevent GC/RLC/PMFW from entering
+ * an invalid state.
+ */
+ ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GfxDeviceDriverReset,
+ SMU_RESET_MODE_2, NULL);
+ if (ret)
+ return ret;
+
ret = smu_cmn_send_smc_msg(smu, SMU_MSG_PrepareMp1ForUnload, NULL);
+ }
return ret;
}
--
2.39.2
