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>
32 #define DRIVER_NAME	"rockchip"
33 #define DRIVER_DESC	"RockChip Soc DRM"
49 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_attach_device()
55 	ret = iommu_attach_device(private->domain, dev);  in rockchip_drm_dma_attach_device()
67 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_detach_device()
68 	struct iommu_domain *domain = private->domain;  in rockchip_drm_dma_detach_device()
78 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_init_iommu()
85 	private->domain = iommu_domain_alloc(&platform_bus_type);  in rockchip_drm_init_iommu()
86 	if (!private->domain)  in rockchip_drm_init_iommu()
87 		return -ENOMEM;  in rockchip_drm_init_iommu()
89 	geometry = &private->domain->geometry;  in rockchip_drm_init_iommu()
90 	start = geometry->aperture_start;  in rockchip_drm_init_iommu()
91 	end = geometry->aperture_end;  in rockchip_drm_init_iommu()
93 	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",  in rockchip_drm_init_iommu()
95 	drm_mm_init(&private->mm, start, end - start + 1);  in rockchip_drm_init_iommu()
96 	mutex_init(&private->mm_lock);  in rockchip_drm_init_iommu()
103 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_iommu_cleanup()
108 	drm_mm_takedown(&private->mm);  in rockchip_iommu_cleanup()
109 	iommu_domain_free(private->domain);  in rockchip_iommu_cleanup()
122 			      "Failed to remove existing framebuffers - %d.\n",  in rockchip_drm_bind()
133 	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);  in rockchip_drm_bind()
135 		ret = -ENOMEM;  in rockchip_drm_bind()
139 	drm_dev->dev_private = private;  in rockchip_drm_bind()
141 	INIT_LIST_HEAD(&private->psr_list);  in rockchip_drm_bind()
142 	mutex_init(&private->psr_list_lock);  in rockchip_drm_bind()
159 	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);  in rockchip_drm_bind()
258  * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
262  * @ep: endpoint of a rockchip vop
264  * returns true if subdriver, false if external bridge and -ENODEV
275 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
277 	/* status disabled will prevent creation of platform-devices */  in rockchip_drm_endpoint_is_subdriver()
281 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
284 	 * All rockchip subdrivers have probed at this point, so  in rockchip_drm_endpoint_is_subdriver()
287 	drv = pdev->dev.driver;  in rockchip_drm_endpoint_is_subdriver()
313 	list_for_each_entry(link, &dev->links.consumers, s_node)  in rockchip_drm_match_remove()
327 			d = platform_find_device_by_driver(p, &drv->driver);  in rockchip_drm_match_add()
342 	return match ?: ERR_PTR(-ENODEV);  in rockchip_drm_match_add()
352 	struct device_node *np = dev->of_node;  in rockchip_drm_platform_of_probe()
358 		return -ENODEV;  in rockchip_drm_platform_of_probe()
367 		if (!of_device_is_available(port->parent)) {  in rockchip_drm_platform_of_probe()
372 		iommu = of_parse_phandle(port->parent, "iommus", 0);  in rockchip_drm_platform_of_probe()
373 		if (!iommu || !of_device_is_available(iommu->parent)) {  in rockchip_drm_platform_of_probe()
375 				      "no iommu attached for %pOF, using non-iommu buffers\n",  in rockchip_drm_platform_of_probe()
376 				      port->parent);  in rockchip_drm_platform_of_probe()
379 			 * crtc use non-iommu buffer.  in rockchip_drm_platform_of_probe()
392 		return -ENODEV;  in rockchip_drm_platform_of_probe()
397 			      "No available vop found for display-subsystem.\n");  in rockchip_drm_platform_of_probe()
398 		return -ENODEV;  in rockchip_drm_platform_of_probe()
406 	struct device *dev = &pdev->dev;  in rockchip_drm_platform_probe()
429 	component_master_del(&pdev->dev, &rockchip_drm_ops);  in rockchip_drm_platform_remove()
431 	rockchip_drm_match_remove(&pdev->dev);  in rockchip_drm_platform_remove()
445 	{ .compatible = "rockchip,display-subsystem", },
455 		.name = "rockchip-drm",
514 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
515 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");