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>
10 #include <linux/dma-mapping.h>
29 #include <asm/dma-iommu.h>
40 #define DRIVER_NAME	"rockchip"
41 #define DRIVER_DESC	"RockChip Soc DRM"
56 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_attach_device()
59 	if (!private->domain)  in rockchip_drm_dma_attach_device()
71 	ret = iommu_attach_device(private->domain, dev);  in rockchip_drm_dma_attach_device()
83 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_detach_device()
85 	if (!private->domain)  in rockchip_drm_dma_detach_device()
88 	iommu_detach_device(private->domain, dev);  in rockchip_drm_dma_detach_device()
94 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_init_device()
97 		private->iommu_dev = ERR_PTR(-ENODEV);  in rockchip_drm_dma_init_device()
98 	else if (!private->iommu_dev)  in rockchip_drm_dma_init_device()
99 		private->iommu_dev = dev;  in rockchip_drm_dma_init_device()
104 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_init_iommu()
109 	if (IS_ERR_OR_NULL(private->iommu_dev))  in rockchip_drm_init_iommu()
112 	private->domain = iommu_paging_domain_alloc(private->iommu_dev);  in rockchip_drm_init_iommu()
113 	if (IS_ERR(private->domain)) {  in rockchip_drm_init_iommu()
114 		ret = PTR_ERR(private->domain);  in rockchip_drm_init_iommu()
115 		private->domain = NULL;  in rockchip_drm_init_iommu()
119 	geometry = &private->domain->geometry;  in rockchip_drm_init_iommu()
120 	start = geometry->aperture_start;  in rockchip_drm_init_iommu()
121 	end = geometry->aperture_end;  in rockchip_drm_init_iommu()
123 	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",  in rockchip_drm_init_iommu()
125 	drm_mm_init(&private->mm, start, end - start + 1);  in rockchip_drm_init_iommu()
126 	mutex_init(&private->mm_lock);  in rockchip_drm_init_iommu()
133 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_iommu_cleanup()
135 	if (!private->domain)  in rockchip_iommu_cleanup()
138 	drm_mm_takedown(&private->mm);  in rockchip_iommu_cleanup()
139 	iommu_domain_free(private->domain);  in rockchip_iommu_cleanup()
152 			      "Failed to remove existing framebuffers - %d.\n",  in rockchip_drm_bind()
163 	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);  in rockchip_drm_bind()
165 		ret = -ENOMEM;  in rockchip_drm_bind()
169 	drm_dev->dev_private = private;  in rockchip_drm_bind()
186 	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);  in rockchip_drm_bind()
286 		return -ENOENT;  in rockchip_drm_encoder_set_crtc_endpoint_id()
290 		return -ENOENT;  in rockchip_drm_encoder_set_crtc_endpoint_id()
296 	rkencoder->crtc_endpoint_id = ep.id;  in rockchip_drm_encoder_set_crtc_endpoint_id()
302  * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
306  * @ep: endpoint of a rockchip vop
308  * returns true if subdriver, false if external bridge and -ENODEV
319 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
321 	/* status disabled will prevent creation of platform-devices */  in rockchip_drm_endpoint_is_subdriver()
324 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
330 	/* enabled non-platform-devices can immediately return here */  in rockchip_drm_endpoint_is_subdriver()
335 	 * All rockchip subdrivers have probed at this point, so  in rockchip_drm_endpoint_is_subdriver()
338 	drv = pdev->dev.driver;  in rockchip_drm_endpoint_is_subdriver()
359 	list_for_each_entry(link, &dev->links.consumers, s_node)  in rockchip_drm_match_remove()
363 /* list of preferred vop devices */
365 	"rockchip,rk3399-vop-big",
375 	/* add preferred vop device match before adding driver device matches */  in rockchip_drm_match_add()
377 		port = of_parse_phandle(dev->of_node, "ports", i);  in rockchip_drm_match_add()
381 		if (of_device_is_available(port->parent) &&  in rockchip_drm_match_add()
382 		    of_device_compatible_match(port->parent,  in rockchip_drm_match_add()
386 						   port->parent);  in rockchip_drm_match_add()
396 			d = platform_find_device_by_driver(p, &drv->driver);  in rockchip_drm_match_add()
411 	return match ?: ERR_PTR(-ENODEV);  in rockchip_drm_match_add()
421 	struct device_node *np = dev->of_node;  in rockchip_drm_platform_of_probe()
427 		return -ENODEV;  in rockchip_drm_platform_of_probe()
434 		if (!of_device_is_available(port->parent)) {  in rockchip_drm_platform_of_probe()
445 		return -ENODEV;  in rockchip_drm_platform_of_probe()
450 			      "No available vop found for display-subsystem.\n");  in rockchip_drm_platform_of_probe()
451 		return -ENODEV;  in rockchip_drm_platform_of_probe()
459 	struct device *dev = &pdev->dev;  in rockchip_drm_platform_probe()
482 	component_master_del(&pdev->dev, &rockchip_drm_ops);  in rockchip_drm_platform_remove()
484 	rockchip_drm_match_remove(&pdev->dev);  in rockchip_drm_platform_remove()
496 	{ .compatible = "rockchip,display-subsystem", },
506 		.name = "rockchip-drm",
523 		return -ENODEV;  in rockchip_drm_init()
571 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
572 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");