tree 145ac57716c506457b207dc55cd46a6131576f81
parent c5f228ef6ccddbc3ebc346e2cfb2b11c1762696f
author yt.shen@mediatek.com <yt.shen@mediatek.com> 1490959831 +0800
committer CK Hu <ck.hu@mediatek.com> 1491580933 +0800

drm/mediatek: add shadow register support

We need to acquire mutex before using the resources,
and need to release it after finished.
So we don't need to write registers in the blanking period.

Signed-off-by: YT Shen <yt.shen@mediatek.com>
Acked-by: CK Hu <ck.hu@mediatek.com>