[PATCH] drm/amd/pm: Add VCN reset message support for SMU v13.0.12

[Alex Deucher]

On Tue, Aug 19, 2025 at 5:08 AM Jesse.Zhang <Jesse.Zhang at amd.com> wrote:
>
> This commit adds support for VCN reset functionality in SMU v13.0.12 by:
>
> 1. Adding two new PPSMC messages in smu_v13_0_12_ppsmc.h:
>    - PPSMC_MSG_ResetVCN (0x5E)
>    - PPSMC_MSG_CPPipeReset (0x5F)
>    - Updates PPSMC_Message_Count to 0x60 to account for new messages
>
> 2. Adding message mapping for ResetVCN in smu_v13_0_12_ppt.c:
>    - Maps SMU_MSG_ResetVCN to PPSMC_MSG_ResetVCN
>
> These changes enable proper VCN reset handling through the SMU firmware
> interface for compatible AMD GPUs.
>
> Signed-off-by: Jesse Zhang <Jesse.Zhang at amd.com>

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

> ---
>  drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu_v13_0_12_ppsmc.h | 4 +++-
>  drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_12_ppt.c         | 1 +
>  2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu_v13_0_12_ppsmc.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu_v13_0_12_ppsmc.h
> index aff2776a8b6f..037529eb70bb 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu_v13_0_12_ppsmc.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu_v13_0_12_ppsmc.h
> @@ -120,7 +120,9 @@
>  #define PPSMC_MSG_GetBadPageSeverity                0x5B
>  #define PPSMC_MSG_GetSystemMetricsTable             0x5C
>  #define PPSMC_MSG_GetSystemMetricsVersion           0x5D
> -#define PPSMC_Message_Count                         0x5E
> +#define PPSMC_MSG_ResetVCN                          0x5E
> +#define PPSMC_MSG_CPPipeReset                       0x5F
> +#define PPSMC_Message_Count                         0x60
>
>  //PPSMC Reset Types for driver msg argument
>  #define PPSMC_RESET_TYPE_DRIVER_MODE_1_RESET        0x1
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_12_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_12_ppt.c
> index 32fd0be05cff..a3eb19f702d0 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_12_ppt.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_12_ppt.c
> @@ -136,6 +136,7 @@ const struct cmn2asic_msg_mapping smu_v13_0_12_message_map[SMU_MSG_MAX_COUNT] =
>         MSG_MAP(RmaDueToBadPageThreshold,            PPSMC_MSG_RmaDueToBadPageThreshold,        0),
>         MSG_MAP(SetThrottlingPolicy,                 PPSMC_MSG_SetThrottlingPolicy,             0),
>         MSG_MAP(ResetSDMA,                           PPSMC_MSG_ResetSDMA,                       0),
> +       MSG_MAP(ResetVCN,                            PPSMC_MSG_ResetVCN,                        0),
>         MSG_MAP(GetStaticMetricsTable,               PPSMC_MSG_GetStaticMetricsTable,           1),
>         MSG_MAP(GetSystemMetricsTable,               PPSMC_MSG_GetSystemMetricsTable,           0),
>  };
> --
> 2.49.0
>