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Subject[PATCH v2 17/25] drm/mediatek: add background color input select function for ovl/ovl_2l
Date
From: Yongqiang Niu <yongqiang.niu@mediatek.com>

This patch add background color input select function for ovl/ovl_2l

ovl include 4 DRAM layer and 1 background color layer
ovl_2l include 4 DRAM layer and 1 background color layer
DRAM layer frame buffer data from render hardware, GPU for example.
backgournd color layer is embed in ovl/ovl_2l, we can only set
it color, but not support DRAM frame buffer.

for ovl0->ovl0_2l direct link usecase,
we need set ovl0_2l background color intput select from ovl0
if render send DRAM buffer layer number <=4, all these layer read
by ovl.
layer0 is at the bottom of all layers.
layer3 is at the top of all layers.
if render send DRAM buffer layer numbfer >=4 && <=6
ovl0 read layer0~3
ovl0_2l read layer4~5
layer5 is at the top ot all these layers.

the decision of how to setting ovl0/ovl0_2l read these layer data
is controlled in mtk crtc, which will be another patch

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index a0ab760..c226284 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -27,6 +27,8 @@
#define DISP_REG_OVL_EN 0x000c
#define DISP_REG_OVL_RST 0x0014
#define DISP_REG_OVL_ROI_SIZE 0x0020
+#define DISP_REG_OVL_DATAPATH_CON 0x0024
+#define OVL_BGCLR_SEL_IN BIT(2)
#define DISP_REG_OVL_ROI_BGCLR 0x0028
#define DISP_REG_OVL_SRC_CON 0x002c
#define DISP_REG_OVL_CON(n) (0x0030 + 0x20 * (n))
@@ -245,6 +247,26 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
mtk_ovl_layer_on(comp, idx);
}

+static void mtk_ovl_bgclr_in_on(struct mtk_ddp_comp *comp,
+ enum mtk_ddp_comp_id prev)
+{
+ int is_ovl = 0;
+
+ if (prev == DDP_COMPONENT_OVL0 ||
+ prev == DDP_COMPONENT_OVL0_2L ||
+ prev == DDP_COMPONENT_OVL1_2L)
+ is_ovl = 1;
+
+ mtk_ddp_write_mask((is_ovl << 2), comp,
+ DISP_REG_OVL_DATAPATH_CON, OVL_BGCLR_SEL_IN);
+}
+
+static void mtk_ovl_bgclr_in_off(struct mtk_ddp_comp *comp)
+{
+ mtk_ddp_write_mask(0, comp,
+ DISP_REG_OVL_DATAPATH_CON, OVL_BGCLR_SEL_IN);
+}
+
static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
.config = mtk_ovl_config,
.start = mtk_ovl_start,
@@ -255,6 +277,8 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
.layer_on = mtk_ovl_layer_on,
.layer_off = mtk_ovl_layer_off,
.layer_config = mtk_ovl_layer_config,
+ .bgclr_in_on = mtk_ovl_bgclr_in_on,
+ .bgclr_in_off = mtk_ovl_bgclr_in_off,
};

static int mtk_disp_ovl_bind(struct device *dev, struct device *master,
--
1.8.1.1.dirty
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