Commit 31729e8c authored by Tim Huang's avatar Tim Huang Committed by Alex Deucher
Browse files

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: default avatarTim Huang <Tim.Huang@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d4396924

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c

+11 −1
Original line number Diff line number Diff line
@@ -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;

}