[PATCH] drm/amd: Update strapping for NBIO 2.5.0

[Alex Deucher]

On Tue, Dec 10, 2024 at 9:45 PM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> This helps to avoid a spurious PME event on hotplug to Azalia.
>
> Cc: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
> Reported-by: ionut_n2001 at yahoo.com
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=215884
> Tested-by: Gabriel Marcano <gabemarcano at yahoo.com>
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>

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

> ---
>  drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
> index b1b57dcc5a73..616b290c9381 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
> @@ -271,8 +271,20 @@ const struct nbio_hdp_flush_reg nbio_v7_0_hdp_flush_reg = {
>         .ref_and_mask_sdma1 = GPU_HDP_FLUSH_DONE__SDMA1_MASK,
>  };
>
> +#define regRCC_DEV0_EPF6_STRAP4                                                                         0xd304
> +#define regRCC_DEV0_EPF6_STRAP4_BASE_IDX                                                                5
> +
>  static void nbio_v7_0_init_registers(struct amdgpu_device *adev)
>  {
> +       uint32_t data;
> +
> +       switch (adev->ip_versions[NBIO_HWIP][0]) {
> +       case IP_VERSION(2, 5, 0):
> +               data = RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF6_STRAP4) & ~BIT(23);
> +               WREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF6_STRAP4, data);
> +               break;
> +       }
> +
>  }
>
>  #define MMIO_REG_HOLE_OFFSET (0x80000 - PAGE_SIZE)
> --
> 2.34.1
>