1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4  * Author:Mark Yao <mark.yao@rock-chips.com>
9 #include <linux/dma-mapping.h>
10 #include <linux/dma-iommu.h>
31 #define DRIVER_NAME	"rockchip"
32 #define DRIVER_DESC	"RockChip Soc DRM"
48 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_attach_device()
54 	ret = iommu_attach_device(private->domain, dev);  in rockchip_drm_dma_attach_device()
66 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_detach_device()
67 	struct iommu_domain *domain = private->domain;  in rockchip_drm_dma_detach_device()
77 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_init_iommu()
84 	private->domain = iommu_domain_alloc(&platform_bus_type);  in rockchip_drm_init_iommu()
85 	if (!private->domain)  in rockchip_drm_init_iommu()
86 		return -ENOMEM;  in rockchip_drm_init_iommu()
88 	geometry = &private->domain->geometry;  in rockchip_drm_init_iommu()
89 	start = geometry->aperture_start;  in rockchip_drm_init_iommu()
90 	end = geometry->aperture_end;  in rockchip_drm_init_iommu()
92 	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",  in rockchip_drm_init_iommu()
94 	drm_mm_init(&private->mm, start, end - start + 1);  in rockchip_drm_init_iommu()
95 	mutex_init(&private->mm_lock);  in rockchip_drm_init_iommu()
102 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_iommu_cleanup()
107 	drm_mm_takedown(&private->mm);  in rockchip_iommu_cleanup()
108 	iommu_domain_free(private->domain);  in rockchip_iommu_cleanup()
123 	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);  in rockchip_drm_bind()
125 		ret = -ENOMEM;  in rockchip_drm_bind()
129 	drm_dev->dev_private = private;  in rockchip_drm_bind()
131 	INIT_LIST_HEAD(&private->psr_list);  in rockchip_drm_bind()
132 	mutex_init(&private->psr_list_lock);  in rockchip_drm_bind()
149 	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);  in rockchip_drm_bind()
157 	 * - with irq_enabled = true, we can use the vblank feature.  in rockchip_drm_bind()
159 	drm_dev->irq_enabled = true;  in rockchip_drm_bind()
259  * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
263  * @ep: endpoint of a rockchip vop
265  * returns true if subdriver, false if external bridge and -ENODEV
276 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
278 	/* status disabled will prevent creation of platform-devices */  in rockchip_drm_endpoint_is_subdriver()
282 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
285 	 * All rockchip subdrivers have probed at this point, so  in rockchip_drm_endpoint_is_subdriver()
288 	drv = pdev->dev.driver;  in rockchip_drm_endpoint_is_subdriver()
314 	list_for_each_entry(link, &dev->links.consumers, s_node)  in rockchip_drm_match_remove()
328 			d = platform_find_device_by_driver(p, &drv->driver);  in rockchip_drm_match_add()
343 	return match ?: ERR_PTR(-ENODEV);  in rockchip_drm_match_add()
353 	struct device_node *np = dev->of_node;  in rockchip_drm_platform_of_probe()
359 		return -ENODEV;  in rockchip_drm_platform_of_probe()
368 		if (!of_device_is_available(port->parent)) {  in rockchip_drm_platform_of_probe()
373 		iommu = of_parse_phandle(port->parent, "iommus", 0);  in rockchip_drm_platform_of_probe()
374 		if (!iommu || !of_device_is_available(iommu->parent)) {  in rockchip_drm_platform_of_probe()
376 				      "no iommu attached for %pOF, using non-iommu buffers\n",  in rockchip_drm_platform_of_probe()
377 				      port->parent);  in rockchip_drm_platform_of_probe()
380 			 * crtc use non-iommu buffer.  in rockchip_drm_platform_of_probe()
393 		return -ENODEV;  in rockchip_drm_platform_of_probe()
398 			      "No available vop found for display-subsystem.\n");  in rockchip_drm_platform_of_probe()
399 		return -ENODEV;  in rockchip_drm_platform_of_probe()
407 	struct device *dev = &pdev->dev;  in rockchip_drm_platform_probe()
430 	component_master_del(&pdev->dev, &rockchip_drm_ops);  in rockchip_drm_platform_remove()
432 	rockchip_drm_match_remove(&pdev->dev);  in rockchip_drm_platform_remove()
446 	{ .compatible = "rockchip,display-subsystem", },
456 		.name = "rockchip-drm",
515 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
516 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");