Re: [PATCH v2 15/25] drm/omapdrm: Compute dumb-buffer sizes with drm_mode_size_dumb()

[Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>]

Hi,

On 09/01/2025 16:57, Thomas Zimmermann wrote:
> Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch and
> buffer size. Align the pitch to a multiple of 8.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_gem.c | 15 +++++++--------
>   1 file changed, 7 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c
> index b9c67e4ca360..b8413a2dcdeb 100644
> --- a/drivers/gpu/drm/omapdrm/omap_gem.c
> +++ b/drivers/gpu/drm/omapdrm/omap_gem.c
> @@ -11,6 +11,7 @@
>   #include <linux/pfn_t.h>
>   #include <linux/vmalloc.h>
>   
> +#include <drm/drm_dumb_buffers.h>
>   #include <drm/drm_prime.h>
>   #include <drm/drm_vma_manager.h>
>   
> @@ -583,15 +584,13 @@ static int omap_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struc
>   int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
>   		struct drm_mode_create_dumb *args)
>   {
> -	union omap_gem_size gsize;
> -
> -	args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
> -
> -	args->size = PAGE_ALIGN(args->pitch * args->height);
> +	union omap_gem_size gsize = { };
> +	int ret;
>   
> -	gsize = (union omap_gem_size){
> -		.bytes = args->size,
> -	};
> +	ret = drm_mode_size_dumb(dev, args, SZ_8, 0);
> +	if (ret)
> +		return ret;
> +	gsize.bytes = args->size;
>   
>   	return omap_gem_new_handle(dev, file, gsize,
>   			OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle);

Tested on dra76 evm.

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

  Tomi