On 11/25/2021 6:52 PM, Chen, Guchun wrote:
[Public]
Use dev_warn to be mGPU friendly?
The intention is to get a trace as well along with that. There are
multiple paths to this function.
Thanks,
Lijo
Regards,
Guchun
-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Lijo Lazar
Sent: Thursday, November 25, 2021 7:51 PM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Limonciello, Mario <Mario.Limonciello@xxxxxxx>; Zhang, Hawking <Hawking.Zhang@xxxxxxx>
Subject: [PATCH] drm/amd/pm: Add warning for unexpected PG requests
Ideally power gate/ungate requests shouldn't come when smu block is uninitialized. Add a WARN message to check the origins if such a thing ever happens.
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
---
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index e156add7b560..e0f8ab8be975 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -277,8 +277,11 @@ static int smu_dpm_set_power_gate(void *handle,
struct smu_context *smu = handle;
int ret = 0;
- if (!smu->pm_enabled || !smu->adev->pm.dpm_enabled)
+ if (!smu->pm_enabled || !smu->adev->pm.dpm_enabled) {
+ WARN(true, "SMU uninitialized but power %s requested for %u!\n",
+ gate ? "gate" : "ungate", block_type);
return -EOPNOTSUPP;
+ }
switch (block_type) {
/*
--
2.25.1
