On Tue, Nov 12, 2024 at 11:13 AM Mario Limonciello
<mario.limonciello@xxxxxxx> wrote:
>
> From: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
>
> There is a strapping issue on NBIO 7.7.0 that can lead to spurious PME
> events while in the D0 state.
>
> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
> Co-developed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
> Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c
> index fb37e354a9d5..1ac730328516 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c
> @@ -247,6 +247,12 @@ static void nbio_v7_7_init_registers(struct amdgpu_device *adev)
> if (def != data)
> WREG32_SOC15(NBIO, 0, regBIF0_PCIE_MST_CTRL_3, data);
>
> + switch (adev->ip_versions[NBIO_HWIP][0]) {
> + case IP_VERSION(7, 7, 0):
> + 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_7_update_medium_grain_clock_gating(struct amdgpu_device *adev,
> --
> 2.34.1
>
