On Tue, Dec 4, 2012 at 1:14 PM, Inki Dae <
inki.dae@samsung.com> wrote:
> Changelog v2:
> fix page fault issue.
> - defer to unreference old fb to avoid page fault issue.
> So with this fixup, new fb would be updated to hardware
> prior to old fb unreferencing. And it removes unnecessary
> patch, "drm/exynos: Unreference fb in exynos_disable_plane()"
>
> Changelog v1:
> This patch releases the fb pended by page flip after fbdev is
> restored propely. And fixes invalid memory access when drm is
> released while doing pageflip.
>
> This patch makes fb's refcount to be increased when setcrtc and
> pageflip are requested. In other words, it increases fb's refcount
> only if dma is going to access memory region to fb and decreases
> old fb's because the old fb isn't accessed by dma anymore.
>
> This could guarantee releasing gem buffer to the fb after dma
> access to the gem buffer has been completed.
>
> Signed-off-by: Inki Dae <
inki.dae@samsung.com>
> Signed-off-by: Kyungmin Park <
kyungmin.park@samsung.com>