<pre>
This patch add ddp write register common api

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 24 ++++++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++++++
 2 files changed, 33 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index a97e27b..1c0f9cc 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -84,6 +84,30 @@
 #define DITHER_ADD_LSHIFT_G(x)                 (((x) & 0x7) << 4)
 #define DITHER_ADD_RSHIFT_G(x)                 (((x) & 0x7) << 0)
 
+void mtk_ddp_write(unsigned int value, struct mtk_ddp_comp *comp,
+                  unsigned int offset)
+{
+       writel(value, comp->regs + offset);
+}
+
+void mtk_ddp_write_relaxed(unsigned int value,
+                          struct mtk_ddp_comp *comp,
+                          unsigned int offset)
+{
+       writel_relaxed(value, comp->regs + offset);
+}
+
+void mtk_ddp_write_mask(unsigned int value,
+                       struct mtk_ddp_comp *comp,
+                       unsigned int offset,
+                       unsigned int mask)
+{
+       unsigned int tmp = readl(comp->regs + offset);
+
+       tmp = (tmp & ~mask) | (value & mask);
+       writel(tmp, comp->regs + offset);
+}
+
 void mtk_dither_set(struct mtk_ddp_comp *comp, unsigned int bpc,
                    unsigned int CFG)
 {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index f2ab0b3..b908172 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -189,5 +189,14 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
 void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp *comp);
 void mtk_dither_set(struct mtk_ddp_comp *comp, unsigned int bpc,
                    unsigned int CFG);
+void mtk_ddp_write(unsigned int value, struct mtk_ddp_comp *comp,
+                  unsigned int offset);
+void mtk_ddp_write_relaxed(unsigned int value,
+                          struct mtk_ddp_comp *comp,
+                          unsigned int offset);
+void mtk_ddp_write_mask(unsigned int value,
+                       struct mtk_ddp_comp *comp,
+                       unsigned int offset,
+                       unsigned int mask);
 
 #endif /* MTK_DRM_DDP_COMP_H */
-- 
1.8.1.1.dirty

</pre><!--type:text--><!--{--><pre>************* Email Confidentiality Notice
 ********************
The information contained in this e-mail message (including any 
attachments) may be confidential, proprietary, privileged, or otherwise
exempt from disclosure under applicable laws. It is intended to be 
conveyed only to the designated recipient(s). Any use, dissemination, 
distribution, printing, retaining or copying of this e-mail (including its 
attachments) by unintended recipient(s) is strictly prohibited and may 
be unlawful. If you are not an intended recipient of this e-mail, or believe
 
that you have received this e-mail in error, please notify the sender 
immediately (by replying to this e-mail), delete any and all copies of 
this e-mail (including any attachments) from your system, and do not
disclose the content of this e-mail to any other person. Thank
 you!</pre><!--}-->