rk3399 基于component 框架，在probe阶段解析dts中各个设备的信息，加到componet match 列表中，等所有的设备加载完毕后，就会引发master设备的bind。

1.vop probe

static int vop_probe(struct platform_device *pdev)
{struct device *dev = &pdev->dev;if (!dev->of_node) {dev_err(dev, "can't find vop devices\n");return -ENODEV;}return component_add(dev, &vop_component_ops);
}
const struct component_ops vop_component_ops = {.bind = vop_bind,.unbind = vop_unbind,
};

 2. hdmi probe:

static struct platform_driver dw_hdmi_rockchip_pltfm_driver = {.probe  = dw_hdmi_rockchip_probe,.remove = dw_hdmi_rockchip_remove,.shutdown = dw_hdmi_rockchip_shutdown,.driver = {.name = "dwhdmi-rockchip",.of_match_table = dw_hdmi_rockchip_dt_ids,.pm = &dw_hdmi_pm_ops,},
};static int dw_hdmi_rockchip_probe(struct platform_device *pdev)
{pm_runtime_enable(&pdev->dev);pm_runtime_get_sync(&pdev->dev);return component_add(&pdev->dev, &dw_hdmi_rockchip_ops);
}static const struct component_ops dw_hdmi_rockchip_ops = {.bind	= dw_hdmi_rockchip_bind,.unbind	= dw_hdmi_rockchip_unbind,
};

 3. 解析display_subsystem dts

display_subsystem: display-subsystem {u-boot,dm-pre-reloc;compatible = "rockchip,display-subsystem";ports = <&vopl_out>, <&vopb_out>;clocks = <&cru PLL_VPLL>, <&cru PLL_CPLL>;clock-names = "hdmi-tmds-pll", "default-vop-pll";devfreq = <&dmc>;status = "disabled";};static struct platform_driver rockchip_drm_platform_driver = {.probe = rockchip_drm_platform_probe,.remove = rockchip_drm_platform_remove,.shutdown = rockchip_drm_platform_shutdown,.driver = {.name = "rockchip-drm",.of_match_table = rockchip_drm_dt_ids,.pm = &rockchip_drm_pm_ops,},
};

  4.bind 函数调用

rockchip_drm_platform_probe//rockchip_drm_ops 指向static const struct component_master_ops rockchip_drm_ops = {.bind = rockchip_drm_bind,.unbind = rockchip_drm_unbind,};component_master_add_with_match(dev, &rockchip_drm_ops, match);  //rockchip_drm_ops 指向try_to_bring_up_mastermaster->ops->bind  // 指向rockchip_drm_bindrockchip_drm_binddrm_dev = drm_dev_alloc(&rockchip_drm_driver, dev); //构建drm_devicescomponent_bind_allrockchip_drm_fbdev_initdrm_dev_register  //  注册drm 字符设备。vop :vop_bindvop_create_crtc     // 创建crtcvop_plane_init       //初始化：planedrm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,&vop_crtc_funcs, NULL);crtc->dev = dev;    // 指向drm_devicecrtc->funcs = funcs;  //赋值vop_crtc_funcscrtc->primary = primary; // primary planecrtc->cursor = cursor;   // 鼠标 plane
HDMI:dw_hdmi_rockchip_binddrm_encoder_helper_add    // encoder  赋值 drm_encoder_helper_funcsdrm_encoder_init         //encoder   赋值	const struct drm_encoder_funcs *funcs;dw_hdmi_binddw_hdmi_registerbridge->funcs = &dw_hdmi_bridge_funcs;drm_bridge_attachdrm_connector_helper_add    //connecor 初始drm_connector_helper_funcsdrm_connector_init          //connecor 初始  drm_connector_funcsdrm_mode_connector_attach_encoder  //connecor 与encoder 结合

5. 字符设备注册：

drm_core_initregister_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)static const struct file_operations drm_stub_fops = {.owner = THIS_MODULE,.open = drm_stub_open,.llseek = noop_llseek,
};drm_dev_registerdrm_minor_registerdevice_add