[PATCH] drm/msm: Stop using iommu_present()

[Rob Clark]

On Tue, Apr 5, 2022 at 7:17 AM Robin Murphy <robin.murphy at arm.com> wrote:
>
> Even if some IOMMU has registered itself on the platform "bus", that
> doesn't necessarily mean it provides translation for the device we
> care about. Replace iommu_present() with a more appropriate check.
>
> Signed-off-by: Robin Murphy <robin.murphy at arm.com>

Reviewed-by: Rob Clark <robdclark at gmail.com>

> ---
>  drivers/gpu/drm/msm/msm_drv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index affa95eb05fc..9c36b505daab 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -274,7 +274,7 @@ bool msm_use_mmu(struct drm_device *dev)
>         struct msm_drm_private *priv = dev->dev_private;
>
>         /* a2xx comes with its own MMU */
> -       return priv->is_a2xx || iommu_present(&platform_bus_type);
> +       return priv->is_a2xx || device_iommu_mapped(dev->dev);
>  }
>
>  static int msm_init_vram(struct drm_device *dev)
> --
> 2.28.0.dirty
>