2012/11/15 Prathyush K <prathyus...@samsung.com>
> This patch adds a exynos drm specific implementation of fb_mmap.
> The root framebuffer is allocated using dma_alloc_attrs which can
> allocate a contig or noncontig buffer depending on whether an iommu
> is attached to drm device or not. The default fb_mmap function
> always assumes the root fb to be contiguous thus failing in case of
> a non-contig buffer.
>
> The exynos drm specific implementation of fb_mmap extracts the private
> data from the fb_info and calls dma_mmap_attrs with the parameters
> used while allocating the buffer.
>
> Signed-off-by: Prathyush K <prathyus...@samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 30
> +++++++++++++++++++++++++++++
> 1 files changed, 30 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> index 67eb6ba..62314ca 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> @@ -46,8 +46,38 @@ struct exynos_drm_fbdev {
> struct exynos_drm_gem_obj *exynos_gem_obj;
> };
>
> +static int exynos_drm_fb_mmap(struct fb_info *info,
> + struct vm_area_struct *vma)
> +{
> + struct drm_fb_helper *helper = info->par;
> + struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
> + struct exynos_drm_gem_obj *exynos_gem_obj =
> exynos_fbd->exynos_gem_obj;
> + struct exynos_drm_gem_buf *buffer = exynos_gem_obj->buffer;
> + unsigned long vm_size;
> + int ret;
> +
> + DRM_DEBUG_KMS("%s\n", __func__);
> +
> + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
> +
> + vm_size = vma->vm_end - vma->vm_start;
> +
> + if (vm_size > buffer->size)
> + return -EINVAL;
> +
> + ret = dma_mmap_attrs(helper->dev->dev, vma, buffer->kvaddr,
> + buffer->dma_addr, vm_size, &buffer->dma_attrs);
>
use original size requested in dma_alloc_attrs instead of vm_size. And
please, leave previous history like below,
For example,
Changelog v2:
new comments such as what is changed, what is added and so on.
Changelog v1:
origin comments.
> + if (ret < 0) {
> + DRM_ERROR("failed to mmap.\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static struct fb_ops exynos_drm_fb_ops = {
> .owner = THIS_MODULE,
> + .fb_mmap = exynos_drm_fb_mmap,
> .fb_fillrect = cfb_fillrect,
> .fb_copyarea = cfb_copyarea,
> .fb_imageblit = cfb_imageblit,
> --
> 1.7.0.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel
