Re: [PATCH] drm/msm: Fix range size vs end confusion

[Dmitry Baryshkov]

On Thu, 7 Apr 2022 at 23:27, Rob Clark <robdclark@xxxxxxxxx> wrote:
>
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> The fourth param is size, rather than range_end.
>
> Note that we could increase the address space size if we had a way to
> prevent buffers from spanning a 4G split, mostly just to avoid fw bugs
> with 64b math.
>
> Fixes: 84c31ee16f90 ("drm/msm/a6xx: Add support for per-instance pagetables")
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>

> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 17de46fc4bf2..80d57608b34a 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1742,7 +1742,7 @@ a6xx_create_private_address_space(struct msm_gpu *gpu)
>                 return ERR_CAST(mmu);
>
>         return msm_gem_address_space_create(mmu,
> -               "gpu", 0x100000000ULL, 0x1ffffffffULL);
> +               "gpu", 0x100000000ULL, SZ_4G);
>  }
>
>  static uint32_t a6xx_get_rptr(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
> --
> 2.35.1
>


-- 
With best wishes
Dmitry