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drm/mediatek: add background color input select function for ovl/ovl_2l

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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>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
Yongqiang Niu 2019-08-29 22:50:43 +08:00 committed by CK Hu
parent 132c6e250e
commit 318462d1a5
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/mediatek/mtk_disp_ovl.c
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@ -19,6 +19,8 @@
#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))
@ -237,6 +239,24 @@ 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)
{
unsigned int reg;
reg = readl(comp->regs + DISP_REG_OVL_DATAPATH_CON);
reg = reg | OVL_BGCLR_SEL_IN;
writel(reg, comp->regs + DISP_REG_OVL_DATAPATH_CON);
}
static void mtk_ovl_bgclr_in_off(struct mtk_ddp_comp *comp)
{
unsigned int reg;
reg = readl(comp->regs + DISP_REG_OVL_DATAPATH_CON);
reg = reg & ~OVL_BGCLR_SEL_IN;
writel(reg, comp->regs + DISP_REG_OVL_DATAPATH_CON);
}
static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
.config = mtk_ovl_config,
.start = mtk_ovl_start,
@ -247,6 +267,8 @@ static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
.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,