[v1] drm/msm: add shutdown support for display platform_driver

[Stephen Boyd]

Quoting Krishna Manikandan (2020-05-28 01:38:23)
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index e4b750b..7a8953f 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -1322,6 +1322,18 @@ static int msm_pdev_remove(struct platform_device *pdev)
>         return 0;
>  }
>  
> +static void msm_pdev_shutdown(struct platform_device *pdev)
> +{
> +       struct drm_device *drm = platform_get_drvdata(pdev);
> +
> +       if (!drm) {
> +               DRM_ERROR("Invalid drm device node\n");
> +               return;
> +       }

When would this ever happen? Please drop this useless check.

> +
> +       drm_atomic_helper_shutdown(drm);
> +}
> +
>  static const struct of_device_id dt_match[] = {
>         { .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 },
>         { .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },