This is a note to let you know that I've just added the patch titled
drm/amd/pm: fixes a random hang in S4 for SMU v13.0.4/11
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-pm-fixes-a-random-hang-in-s4-for-smu-v13.0.4-11.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 31729e8c21ecfd671458e02b6511eb68c2225113 Mon Sep 17 00:00:00 2001
From: Tim Huang <Tim.Huang@xxxxxxx>
Date: Wed, 27 Mar 2024 13:10:37 +0800
Subject: drm/amd/pm: fixes a random hang in S4 for SMU v13.0.4/11
From: Tim Huang <Tim.Huang@xxxxxxx>
commit 31729e8c21ecfd671458e02b6511eb68c2225113 upstream.
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>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Mario Limonciello <superm1@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
--- 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_c
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;
}
Patches currently in stable-queue which might be from Tim.Huang@xxxxxxx are
queue-6.6/drm-amd-pm-fixes-a-random-hang-in-s4-for-smu-v13.0.4-11.patch
