drivers/gpu/drm/imx/dc/dc-lb.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/imx/dc/dc-lb.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/imx/dc/dc-lb.c
Extension
.c
Size
8359 bytes
Lines
326
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (prim_sels[i] == prim) {
			regmap_write_bits(lb->reg_pec, PIXENGCFG_DYNAMIC,
					  PIXENGCFG_DYNAMIC_PRIM_SEL_MASK,
					  PIXENGCFG_DYNAMIC_PRIM_SEL(prim));
			return;
		}
	}

	dev_warn(lb->dev, "invalid primary input selection:%d\n", prim);
}

void dc_lb_pec_dynamic_sec_sel(struct dc_lb *lb, enum dc_link_id sec)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(sec_sels); i++) {
		if (sec_sels[i] == sec) {
			regmap_write_bits(lb->reg_pec, PIXENGCFG_DYNAMIC,
					  PIXENGCFG_DYNAMIC_SEC_SEL_MASK,
					  PIXENGCFG_DYNAMIC_SEC_SEL(sec));
			return;
		}
	}

	dev_warn(lb->dev, "invalid secondary input selection:%d\n", sec);
}

void dc_lb_pec_clken(struct dc_lb *lb, enum dc_pec_clken clken)
{
	regmap_write_bits(lb->reg_pec, PIXENGCFG_DYNAMIC, CLKEN_MASK,
			  CLKEN(clken));
}

static inline void dc_lb_enable_shden(struct dc_lb *lb)
{
	regmap_write_bits(lb->reg_cfg, STATICCONTROL, SHDEN, SHDEN);
}

static inline void dc_lb_shdtoksel(struct dc_lb *lb, enum dc_lb_shadow_sel sel)
{
	regmap_write_bits(lb->reg_cfg, STATICCONTROL, SHDTOKSEL_MASK,
			  SHDTOKSEL(sel));
}

static inline void dc_lb_shdldsel(struct dc_lb *lb, enum dc_lb_shadow_sel sel)
{
	regmap_write_bits(lb->reg_cfg, STATICCONTROL, SHDLDSEL_MASK,
			  SHDLDSEL(sel));
}

void dc_lb_mode(struct dc_lb *lb, enum dc_lb_mode mode)
{
	regmap_write_bits(lb->reg_cfg, CONTROL, CTRL_MODE_MASK, mode);
}

static inline void dc_lb_blendcontrol(struct dc_lb *lb)
{
	u32 val = PRIM_A_BLD_FUNC(DC_LAYERBLEND_BLEND_ZERO) |
		  SEC_A_BLD_FUNC(DC_LAYERBLEND_BLEND_ZERO) |
		  PRIM_C_BLD_FUNC(DC_LAYERBLEND_BLEND_ZERO) |
		  SEC_C_BLD_FUNC(DC_LAYERBLEND_BLEND_CONST_ALPHA) |
		  ALPHA(DRM_BLEND_ALPHA_OPAQUE >> 8);

	regmap_write(lb->reg_cfg, BLENDCONTROL, val);
}

void dc_lb_position(struct dc_lb *lb, int x, int y)
{
	regmap_write(lb->reg_cfg, POSITION, XPOS(x) | YPOS(y));
}

int dc_lb_get_id(struct dc_lb *lb)
{
	return lb->id;
}

void dc_lb_init(struct dc_lb *lb)
{
	dc_lb_pec_dynamic_prim_sel(lb, LINK_ID_NONE);
	dc_lb_pec_dynamic_sec_sel(lb, LINK_ID_NONE);
	dc_lb_pec_clken(lb, CLKEN_DISABLE);
	dc_lb_shdldsel(lb, BOTH);
	dc_lb_shdtoksel(lb, BOTH);
	dc_lb_blendcontrol(lb);
	dc_lb_enable_shden(lb);
}

static int dc_lb_bind(struct device *dev, struct device *master, void *data)
{
	struct platform_device *pdev = to_platform_device(dev);

Annotation

Implementation Notes