[PATCH 1/6] drm/amdgpu: ih doorbell size of range changed for nbio v7.4

[Felix Kuehling]

On 2020-03-19 20:24, Alex Sierra wrote:
> [Why]
> nbio v7.4 size of ih doorbell range is 64 bit. This requires 2 DWords per register.
>
> [How]
> Change ih doorbell size from 2 to 4. This means two Dwords per ring.
> Current configuration uses two ih rings.
>
> Signed-off-by: Alex Sierra <alex.sierra at amd.com>

Why is the subject "PATCH 1/6"? It makes me wonder, what are the other 5 
patches. Anyway, this patch is

Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>


> ---
>   drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
> index 149d386590df..263dbb1f92ee 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
> @@ -185,7 +185,7 @@ static void nbio_v7_4_ih_doorbell_range(struct amdgpu_device *adev,
>   
>   	if (use_doorbell) {
>   		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, OFFSET, doorbell_index);
> -		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, SIZE, 2);
> +		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, SIZE, 4);
>   	} else
>   		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, SIZE, 0);
>