[PATCH] dm/amd/pm: Fix problems with reboot/shutdown for some SMU 13.0.4/13.0.11 users

[Alex Deucher]

On Thu, May 2, 2024 at 3:22 PM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> Limit the workaround introduced by commit 31729e8c21ec ("drm/amd/pm: fixes
> a random hang in S4 for SMU v13.0.4/11") to only run in the s4 path.
>
> Cc: Tim Huang <Tim.Huang at amd.com>
> Fixes: 31729e8c21ec ("drm/amd/pm: fixes a random hang in S4 for SMU v13.0.4/11")
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3351
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
> I tested this on SMU 13.0.4 for ~85 cycles with this script, BIOS 1.1.0.2a and
> didn't observe any hangs.
>
> ```
> #!/bin/sh
> echo test_resume > /sys/power/disk
> i=1
> while [ : ]; do
>
>   echo "Starting cycle $i"
>   echo disk > /sys/power/state
>   echo "Ending cycle $i"
>   i=$((i+1))
>   sleep 5
> done
> ```
>
>  drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_4_ppt.c | 2 +-
>  1 file changed, 1 insertion(+), 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 949131bd1ecb..4abfcd32747d 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
> @@ -226,7 +226,7 @@ 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_s4) {
>                 /* Adds a GFX reset as workaround just before sending the
>                  * MP1_UNLOAD message to prevent GC/RLC/PMFW from entering
>                  * an invalid state.
> --
> 2.43.0
>