linux-kernel - Re: [PATCH] drm/sun4i: Use DRM_GEM_CMA_VMAP_DRIVER

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Date:   Tue, 16 Apr 2019 15:50:57 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Chen-Yu Tsai <wens@...e.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH] drm/sun4i: Use DRM_GEM_CMA_VMAP_DRIVER_OPS for GEM
 operations

Hi,

Le lundi 15 avril 2019 à 18:15 +0200, Paul Kocialkowski a écrit :
> Our driver makes a typical use of CMA, with GEM object allocated as
> GEM CMA objects. Use DRM_GEM_CMA_VMAP_DRIVER_OPS to describe the ops
> instead of duplicating them.
> 
> Because DRM_GEM_CMA_VMAP_DRIVER_OPS implements a gem_create_object op
> which sets per-object funcs (drm_cma_gem_default_funcs), we can also
> get rid of free_object_unlocked and gem_vm_ops, which are superseded
> by the object funcs.

I'll need to respin this one by moving DRM_GEM_CMA_VMAP_DRIVER_OPS
before our custom dumb_create, otherwise DRM_GEM_CMA_VMAP_DRIVER_OPS's
dumb_create will take effect instead of our own.

Cheers,

Paul

> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> ---
>  drivers/gpu/drm/sun4i/sun4i_drv.c | 16 +---------------
>  1 file changed, 1 insertion(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
> index 3ebd9f5e2719..453b94f9a5b7 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_drv.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
> @@ -53,21 +53,7 @@ static struct drm_driver sun4i_drv_driver = {
>  
>  	/* GEM Operations */
>  	.dumb_create		= drm_sun4i_gem_dumb_create,
> -	.gem_free_object_unlocked = drm_gem_cma_free_object,
> -	.gem_vm_ops		= &drm_gem_cma_vm_ops,
> -
> -	/* PRIME Operations */
> -	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
> -	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
> -	.gem_prime_import	= drm_gem_prime_import,
> -	.gem_prime_export	= drm_gem_prime_export,
> -	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
> -	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
> -	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
> -	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
> -	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
> -
> -	/* Frame Buffer Operations */
> +	DRM_GEM_CMA_VMAP_DRIVER_OPS,
>  };
>  
>  static int sun4i_drv_bind(struct device *dev)
-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com