drivers/gpu/drm/mediatek/mtk_disp_color.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/mediatek/mtk_disp_color.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/mediatek/mtk_disp_color.c
Extension
.c
Size
4459 bytes
Lines
166
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

struct mtk_disp_color_data {
	unsigned int color_offset;
};

/*
 * struct mtk_disp_color - DISP_COLOR driver structure
 * @crtc: associated crtc to report irq events to
 * @data: platform colour driver data
 */
struct mtk_disp_color {
	struct drm_crtc				*crtc;
	struct clk				*clk;
	void __iomem				*regs;
	struct cmdq_client_reg			cmdq_reg;
	const struct mtk_disp_color_data	*data;
};

int mtk_color_clk_enable(struct device *dev)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	return clk_prepare_enable(color->clk);
}

void mtk_color_clk_disable(struct device *dev)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	clk_disable_unprepare(color->clk);
}

void mtk_color_config(struct device *dev, unsigned int w,
		      unsigned int h, unsigned int vrefresh,
		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	mtk_ddp_write(cmdq_pkt, w, &color->cmdq_reg, color->regs, DISP_COLOR_WIDTH(color));
	mtk_ddp_write(cmdq_pkt, h, &color->cmdq_reg, color->regs, DISP_COLOR_HEIGHT(color));
}

void mtk_color_start(struct device *dev)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
	       color->regs + DISP_COLOR_CFG_MAIN);
	writel(0x1, color->regs + DISP_COLOR_START(color));
}

static int mtk_disp_color_bind(struct device *dev, struct device *master,
			       void *data)
{
	return 0;
}

static void mtk_disp_color_unbind(struct device *dev, struct device *master,
				  void *data)
{
}

static const struct component_ops mtk_disp_color_component_ops = {
	.bind	= mtk_disp_color_bind,
	.unbind = mtk_disp_color_unbind,
};

static int mtk_disp_color_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct mtk_disp_color *priv;
	int ret;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(priv->clk))
		return dev_err_probe(dev, PTR_ERR(priv->clk),
				     "failed to get color clk\n");

	priv->regs = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(priv->regs))
		return dev_err_probe(dev, PTR_ERR(priv->regs),
				     "failed to ioremap color\n");
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
	if (ret)
		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
#endif

Annotation

Implementation Notes