linux-kernel - [PATCH v2 16/25] drm/mediatek: add ddp write register common api

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1553667561-25447-17-git-send-email-yongqiang.niu@mediatek.com>
Date:   Wed, 27 Mar 2019 14:19:12 +0800
From:   <yongqiang.niu@...iatek.com>
To:     <ck.hu@...iatek.com>, <p.zabel@...gutronix.de>,
        <robh+dt@...nel.org>, <matthias.bgg@...il.com>
CC:     <airlied@...ux.ie>, <mark.rutland@....com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <Bibby.Hsieh@...iatek.com>,
        <yt.shen@...iatek.com>, Yongqiang Niu <yongqiang.niu@...iatek.com>
Subject: [PATCH v2 16/25] drm/mediatek: add ddp write register common api

From: Yongqiang Niu <yongqiang.niu@...iatek.com>

This patch add ddp write register common api
this is preparation patch for ovl/ovl_2l direct link
usecase.
in that case, we need this funtion to set one bit of ovl_2l
register

Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 11 +++++++++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index afd6ca2..72288b4 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -84,6 +84,17 @@
 #define DITHER_ADD_LSHIFT_G(x)			(((x) & 0x7) << 4)
 #define DITHER_ADD_RSHIFT_G(x)			(((x) & 0x7) << 0)
 
+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 20e8061..ed715ff 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -198,5 +198,9 @@ 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_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