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drm/amd/pm: fixes a random hang in S4 for SMU v13.0.4/11 

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@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tim Huang 2024-03-27 13:10:37 +08:00 committed by Alex Deucher
parent d4396924c3
commit 31729e8c21
1 changed files with 11 additions and 1 deletions
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12
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c
View File

@ -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;
}