linux-kernel - [PATCH v2 1/3] drm/rockchip: vop: Add support for interrupt registers using write-masks

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Message-Id: <1451965858-12341-1-git-send-email-ykk@rock-chips.com>
Date:	Tue,  5 Jan 2016 11:50:58 +0800
From:	Yakir Yang <ykk@...k-chips.com>
To:	Mark Yao <mark.yao@...k-chips.com>,
	Heiko Stuebner <heiko@...ech.de>,
	David Airlie <airlied@...ux.ie>
Cc:	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	Yakir Yang <ykk@...k-chips.com>
Subject: [PATCH v2 1/3] drm/rockchip: vop: Add support for interrupt registers using write-masks

Some new display-controllers are need to set write-masks to enable writes
to interrupt registers. Allow this to be set on a per-vop basis.

Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---
Changes in v2:
- Add this patch in v2 (Heiko)

 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 7 +++++--
 drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 1 +
 drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 2 ++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index d83bf87..3c83097 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -63,9 +63,12 @@
 #define VOP_INTR_SET_TYPE(vop, name, type, v) \
 	do { \
 		int i, reg = 0; \
-		for (i = 0; i < vop->data->intr->nintrs; i++) { \
-			if (vop->data->intr->intrs[i] & type) \
+		const struct vop_intr *intr = vop->data->intr; \
+		for (i = 0; i < intr->nintrs; i++) { \
+			if (intr->intrs[i] & type) { \
 				reg |= (v) << i; \
+				reg |= intr->write_mask ? (1 << (i + 16)) : 0; \
+			} \
 		} \
 		VOP_INTR_SET(vop, name, reg); \
 	} while (0)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
index 071ff0b..f1bb84d 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -60,6 +60,7 @@ struct vop_ctrl {
 };
 
 struct vop_intr {
+	bool write_mask;
 	const int *intrs;
 	uint32_t nintrs;
 	struct vop_reg enable;
diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
index 3166b46..7fbaf76 100644
--- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
+++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
@@ -174,6 +174,7 @@ static const int rk3288_vop_intrs[] = {
 };
 
 static const struct vop_intr rk3288_vop_intr = {
+	.write_mask = false,
 	.intrs = rk3288_vop_intrs,
 	.nintrs = ARRAY_SIZE(rk3288_vop_intrs),
 	.status = VOP_REG(RK3288_INTR_CTRL0, 0xf, 0),
@@ -240,6 +241,7 @@ static const int rk3036_vop_intrs[] = {
 };
 
 static const struct vop_intr rk3036_intr = {
+	.write_mask = false,
 	.intrs = rk3036_vop_intrs,
 	.nintrs = ARRAY_SIZE(rk3036_vop_intrs),
 	.status = VOP_REG(RK3036_INT_STATUS, 0xf, 0),
-- 
1.9.1


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