Re: [PATCH] drm/loongson: use drm_gem_ttm_dumb_map_offset()

[Thomas Zimmermann <tzimmermann@suse.de>]

Hi,

thanks for the patch.,

Am 08.03.26 um 11:15 schrieb Amin GATTOUT:
> Replace the open-coded lsdc_dumb_map_offset() with the generic
> drm_gem_ttm_dumb_map_offset() helper, which is functionally identical.
> This removes unnecessary boilerplate and aligns with the DRM convention
> for TTM-based drivers.
>
> Signed-off-by: Amin GATTOUT <amin.gattout@gmail.com>

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/loongson/lsdc_drv.c |  3 ++-
>   drivers/gpu/drm/loongson/lsdc_gem.c | 15 ---------------
>   drivers/gpu/drm/loongson/lsdc_gem.h |  4 ----
>   3 files changed, 2 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/loongson/lsdc_drv.c b/drivers/gpu/drm/loongson/lsdc_drv.c
> index abf5bf68eec2..1ece1ea42f78 100644
> --- a/drivers/gpu/drm/loongson/lsdc_drv.c
> +++ b/drivers/gpu/drm/loongson/lsdc_drv.c
> @@ -13,6 +13,7 @@
>   #include <drm/drm_drv.h>
>   #include <drm/drm_fbdev_ttm.h>
>   #include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_gem_ttm_helper.h>
>   #include <drm/drm_ioctl.h>
>   #include <drm/drm_modeset_helper.h>
>   #include <drm/drm_print.h>
> @@ -45,7 +46,7 @@ static const struct drm_driver lsdc_drm_driver = {
>   
>   	.debugfs_init = lsdc_debugfs_init,
>   	.dumb_create = lsdc_dumb_create,
> -	.dumb_map_offset = lsdc_dumb_map_offset,
> +	.dumb_map_offset = drm_gem_ttm_dumb_map_offset,
>   	.gem_prime_import_sg_table = lsdc_prime_import_sg_table,
>   	DRM_FBDEV_TTM_DRIVER_OPS,
>   };
> diff --git a/drivers/gpu/drm/loongson/lsdc_gem.c b/drivers/gpu/drm/loongson/lsdc_gem.c
> index 6372db2d3093..2fb03487c983 100644
> --- a/drivers/gpu/drm/loongson/lsdc_gem.c
> +++ b/drivers/gpu/drm/loongson/lsdc_gem.c
> @@ -234,21 +234,6 @@ int lsdc_dumb_create(struct drm_file *file, struct drm_device *ddev,
>   	return 0;
>   }
>   
> -int lsdc_dumb_map_offset(struct drm_file *filp, struct drm_device *ddev,
> -			 u32 handle, uint64_t *offset)
> -{
> -	struct drm_gem_object *gobj;
> -
> -	gobj = drm_gem_object_lookup(filp, handle);
> -	if (!gobj)
> -		return -ENOENT;
> -
> -	*offset = drm_vma_node_offset_addr(&gobj->vma_node);
> -
> -	drm_gem_object_put(gobj);
> -
> -	return 0;
> -}
>   
>   void lsdc_gem_init(struct drm_device *ddev)
>   {
> diff --git a/drivers/gpu/drm/loongson/lsdc_gem.h b/drivers/gpu/drm/loongson/lsdc_gem.h
> index 92cbb10e6e13..96729b3eebec 100644
> --- a/drivers/gpu/drm/loongson/lsdc_gem.h
> +++ b/drivers/gpu/drm/loongson/lsdc_gem.h
> @@ -14,10 +14,6 @@ lsdc_prime_import_sg_table(struct drm_device *ddev,
>   			   struct dma_buf_attachment *attach,
>   			   struct sg_table *sg);
>   
> -int lsdc_dumb_map_offset(struct drm_file *file,
> -			 struct drm_device *dev,
> -			 u32 handle,
> -			 uint64_t *offset);
>   
>   int lsdc_dumb_create(struct drm_file *file,
>   		     struct drm_device *ddev,
>
> ---
> base-commit: c23719abc3308df7ed3ad35650ad211fb2d2003d
> change-id: 20260308-master-58f0cb492c5e
>
> Best regards,

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)