[PATCH 2/2] drm/amd: Fix initialization mistake for NBIO 7.11 devices

[Alex Deucher]

On Mon, Nov 18, 2024 at 12:57 PM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> There is a strapping issue on NBIO 7.11.x that can lead to spurious PME
> events while in the D0 state.
>
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>

Series is:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c
> index 7a9adfda5814..814ab59fdd4a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c
> @@ -275,6 +275,15 @@ static void nbio_v7_11_init_registers(struct amdgpu_device *adev)
>         if (def != data)
>                 WREG32_SOC15(NBIO, 0, regBIF_BIF256_CI256_RC3X4_USB4_PCIE_MST_CTRL_3, data);
>
> +       switch (adev->ip_versions[NBIO_HWIP][0]) {
> +       case IP_VERSION(7, 11, 0):
> +       case IP_VERSION(7, 11, 1):
> +       case IP_VERSION(7, 11, 2):
> +       case IP_VERSION(7, 11, 3):
> +               data = RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF5_STRAP4) & ~BIT(23);
> +               WREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF5_STRAP4, data);
> +               break;
> +       }
>  }
>
>  static void nbio_v7_11_update_medium_grain_clock_gating(struct amdgpu_device *adev,
> --
> 2.34.1
>