[PATCH] drm/amdgpu: Fix offset for HDP remap in nbio v7.11

[Alex Deucher]

On Mon, Apr 21, 2025 at 5:48 AM Lijo Lazar <lijo.lazar at amd.com> wrote:
>
> APUs in passthrough mode use HDP flush. 0x7F000 offset used for
> remapping HDP flush is mapped to VPE space which could get power gated.
> Use another unused offset in BIF space.
>
> Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>

Assuming we have a full 4k at that offset:

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

> ---
>  drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c
> index 2ece3ae75ec1..bed5ef4d8788 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_11.c
> @@ -360,7 +360,7 @@ static void nbio_v7_11_get_clockgating_state(struct amdgpu_device *adev,
>                 *flags |= AMD_CG_SUPPORT_BIF_LS;
>  }
>
> -#define MMIO_REG_HOLE_OFFSET (0x80000 - PAGE_SIZE)
> +#define MMIO_REG_HOLE_OFFSET 0x44000
>
>  static void nbio_v7_11_set_reg_remap(struct amdgpu_device *adev)
>  {
> --
> 2.25.1
>