Re: [PATCH v2 5/7] drm/panthor: Don't allocate protm_suspend_buf

[Boris Brezillon <boris.brezillon@collabora.com>]

On Sun, 12 Jul 2026 15:54:37 +0200
Ketil Johnsen <ketil.johnsen@arm.com> wrote:

> The PROTM suspend buffer is only needed if the group is going to
> use PROTM in the first place, so let's not assume we need one until
> we're being asked to.
> 
> Signed-off-by: Ketil Johnsen <ketil.johnsen@arm.com>

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

> ---
>  drivers/gpu/drm/panthor/panthor_sched.c | 14 ++++----------
>  1 file changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
> index dc77a174a3368..86c0f12b09e11 100644
> --- a/drivers/gpu/drm/panthor/panthor_sched.c
> +++ b/drivers/gpu/drm/panthor/panthor_sched.c
> @@ -3642,9 +3642,11 @@ static void add_group_kbo_sizes(struct panthor_device *ptdev,
>  	if (drm_WARN_ON(&ptdev->base, ptdev != group->ptdev))
>  		return;
>  
> -	group->fdinfo.kbo_sizes += group->suspend_buf->obj->size;
> -	group->fdinfo.kbo_sizes += group->protm_suspend_buf->obj->size;
>  	group->fdinfo.kbo_sizes += group->syncobjs->obj->size;
> +	group->fdinfo.kbo_sizes += group->suspend_buf->obj->size;
> +
> +	if (group->protm_suspend_buf)
> +		group->fdinfo.kbo_sizes += group->protm_suspend_buf->obj->size;
>  
>  	for (i = 0; i < group->queue_count; i++) {
>  		queue =	group->queues[i];
> @@ -3724,14 +3726,6 @@ int panthor_group_create(struct drm_file *file,
>  		goto err_put_group;
>  	}
>  
> -	suspend_size = csg_iface->control->protm_suspend_size;
> -	group->protm_suspend_buf = panthor_fw_alloc_suspend_buf_mem(ptdev, suspend_size);
> -	if (IS_ERR(group->protm_suspend_buf)) {
> -		ret = PTR_ERR(group->protm_suspend_buf);
> -		group->protm_suspend_buf = NULL;
> -		goto err_put_group;
> -	}
> -
>  	group->syncobjs = panthor_kernel_bo_create(ptdev, group->vm,
>  						   group_args->queues.count *
>  						   sizeof(struct panthor_syncobj_64b),