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drm: mediatek: use common helper for extracting pages array

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Use common helper for converting a sg_table object into struct
page pointer array.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
Marek Szyprowski 2020-05-08 11:02:47 +02:00
parent 960db7fcbd
commit 90dcf44490
1 changed files with 2 additions and 7 deletions
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9
drivers/gpu/drm/mediatek/mtk_drm_gem.c
View file

@ -233,9 +233,7 @@ void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj)
{
struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
struct sg_table *sgt;
struct sg_page_iter iter;
unsigned int npages;
unsigned int i = 0;
if (mtk_gem->kvaddr)
return mtk_gem->kvaddr;
@ -249,11 +247,8 @@ void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj)
if (!mtk_gem->pages)
goto out;
for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) {
mtk_gem->pages[i++] = sg_page_iter_page(&iter);
if (i > npages)
break;
}
drm_prime_sg_to_page_addr_arrays(sgt, mtk_gem->pages, NULL, npages);
mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP,
pgprot_writecombine(PAGE_KERNEL));