1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 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"
48  * Attach a (component) device to the shared drm dma mapping from master drm
49  * device.  This is used by the VOPs to map GEM buffers to a common DMA
53 				   struct device *dev)  in rockchip_drm_dma_attach_device()
55 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_attach_device()
58 	if (!private->domain)  in rockchip_drm_dma_attach_device()
70 	ret = iommu_attach_device(private->domain, dev);  in rockchip_drm_dma_attach_device()
72 		DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");  in rockchip_drm_dma_attach_device()
80 				    struct device *dev)  in rockchip_drm_dma_detach_device()
82 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_detach_device()
84 	if (!private->domain)  in rockchip_drm_dma_detach_device()
87 	iommu_detach_device(private->domain, dev);  in rockchip_drm_dma_detach_device()
91 				  struct device *dev)  in rockchip_drm_dma_init_device()
93 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_init_device()
96 		private->iommu_dev = ERR_PTR(-ENODEV);  in rockchip_drm_dma_init_device()
97 	else if (!private->iommu_dev)  in rockchip_drm_dma_init_device()
98 		private->iommu_dev = dev;  in rockchip_drm_dma_init_device()
103 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_init_iommu()
108 	if (IS_ERR_OR_NULL(private->iommu_dev))  in rockchip_drm_init_iommu()
111 	private->domain = iommu_paging_domain_alloc(private->iommu_dev);  in rockchip_drm_init_iommu()
112 	if (IS_ERR(private->domain)) {  in rockchip_drm_init_iommu()
113 		ret = PTR_ERR(private->domain);  in rockchip_drm_init_iommu()
114 		private->domain = NULL;  in rockchip_drm_init_iommu()
118 	geometry = &private->domain->geometry;  in rockchip_drm_init_iommu()
119 	start = geometry->aperture_start;  in rockchip_drm_init_iommu()
120 	end = geometry->aperture_end;  in rockchip_drm_init_iommu()
122 	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",  in rockchip_drm_init_iommu()
124 	drm_mm_init(&private->mm, start, end - start + 1);  in rockchip_drm_init_iommu()
125 	mutex_init(&private->mm_lock);  in rockchip_drm_init_iommu()
132 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_iommu_cleanup()
134 	if (!private->domain)  in rockchip_iommu_cleanup()
137 	drm_mm_takedown(&private->mm);  in rockchip_iommu_cleanup()
138 	iommu_domain_free(private->domain);  in rockchip_iommu_cleanup()
141 static int rockchip_drm_bind(struct device *dev)  in rockchip_drm_bind()
151 			      "Failed to remove existing framebuffers - %d.\n",  in rockchip_drm_bind()
162 	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);  in rockchip_drm_bind()
164 		ret = -ENOMEM;  in rockchip_drm_bind()
168 	drm_dev->dev_private = private;  in rockchip_drm_bind()
185 	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);  in rockchip_drm_bind()
212 static void rockchip_drm_unbind(struct device *dev)  in rockchip_drm_unbind()
242 static int rockchip_drm_sys_suspend(struct device *dev)  in rockchip_drm_sys_suspend()
249 static int rockchip_drm_sys_resume(struct device *dev)  in rockchip_drm_sys_resume()
271  * @np: The encoder device node
284 		return -ENOENT;  in rockchip_drm_encoder_set_crtc_endpoint_id()
288 		return -ENOENT;  in rockchip_drm_encoder_set_crtc_endpoint_id()
294 	rkencoder->crtc_endpoint_id = ep.id;  in rockchip_drm_encoder_set_crtc_endpoint_id()
300  * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
304  * @ep: endpoint of a rockchip vop
306  * returns true if subdriver, false if external bridge and -ENODEV
307  * if remote port does not contain a device.
317 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
319 	/* status disabled will prevent creation of platform-devices */  in rockchip_drm_endpoint_is_subdriver()
322 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
328 	/* enabled non-platform-devices can immediately return here */  in rockchip_drm_endpoint_is_subdriver()
333 	 * All rockchip subdrivers have probed at this point, so  in rockchip_drm_endpoint_is_subdriver()
334 	 * any device not having a driver now is an external bridge.  in rockchip_drm_endpoint_is_subdriver()
336 	drv = pdev->dev.driver;  in rockchip_drm_endpoint_is_subdriver()
353 static void rockchip_drm_match_remove(struct device *dev)  in rockchip_drm_match_remove()
357 	list_for_each_entry(link, &dev->links.consumers, s_node)  in rockchip_drm_match_remove()
363 	"rockchip,rk3399-vop-big",
367 static struct component_match *rockchip_drm_match_add(struct device *dev)  in rockchip_drm_match_add()
373 	/* add preferred vop device match before adding driver device matches */  in rockchip_drm_match_add()
375 		port = of_parse_phandle(dev->of_node, "ports", i);  in rockchip_drm_match_add()
379 		if (of_device_is_available(port->parent) &&  in rockchip_drm_match_add()
380 		    of_device_compatible_match(port->parent,  in rockchip_drm_match_add()
384 						   port->parent);  in rockchip_drm_match_add()
391 		struct device *p = NULL, *d;  in rockchip_drm_match_add()
394 			d = platform_find_device_by_driver(p, &drv->driver);  in rockchip_drm_match_add()
409 	return match ?: ERR_PTR(-ENODEV);  in rockchip_drm_match_add()
417 static int rockchip_drm_platform_of_probe(struct device *dev)  in rockchip_drm_platform_of_probe()
419 	struct device_node *np = dev->of_node;  in rockchip_drm_platform_of_probe()
425 		return -ENODEV;  in rockchip_drm_platform_of_probe()
432 		if (!of_device_is_available(port->parent)) {  in rockchip_drm_platform_of_probe()
443 		return -ENODEV;  in rockchip_drm_platform_of_probe()
448 			      "No available vop found for display-subsystem.\n");  in rockchip_drm_platform_of_probe()
449 		return -ENODEV;  in rockchip_drm_platform_of_probe()
457 	struct device *dev = &pdev->dev;  in rockchip_drm_platform_probe()
480 	component_master_del(&pdev->dev, &rockchip_drm_ops);  in rockchip_drm_platform_remove()
482 	rockchip_drm_match_remove(&pdev->dev);  in rockchip_drm_platform_remove()
493 	{ .compatible = "rockchip,display-subsystem", },
503 		.name = "rockchip-drm",
520 		return -ENODEV;  in rockchip_drm_init()
570 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
571 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");