drm/omap: fix tiled buffer stride calculations
omap_gem uses page alignment for buffer stride. The related calculations are a bit off, though, as byte stride of 4096 gets aligned to 8192, instead of 4096. This patch changes the code to use DIV_ROUND_UP(), which fixes those calculations and makes them more readable. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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@ -182,7 +182,7 @@ static void evict_entry(struct drm_gem_object *obj,
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size_t size = PAGE_SIZE * n;
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loff_t off = mmap_offset(obj) +
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(entry->obj_pgoff << PAGE_SHIFT);
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const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE);
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const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE);
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if (m > 1) {
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int i;
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@ -424,7 +424,7 @@ static int fault_2d(struct drm_gem_object *obj,
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* into account in some of the math, so figure out virtual stride
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* in pages
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*/
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const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE);
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const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE);
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/* We don't use vmf->pgoff since that has the fake offset: */
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pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
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