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>
27 #include <asm/dma-iommu.h>
38 #define DRIVER_NAME	"rockchip"
39 #define DRIVER_DESC	"RockChip Soc DRM"
54 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_attach_device()
57 	if (!private->domain)  in rockchip_drm_dma_attach_device()
69 	ret = iommu_attach_device(private->domain, dev);  in rockchip_drm_dma_attach_device()
81 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_detach_device()
83 	if (!private->domain)  in rockchip_drm_dma_detach_device()
86 	iommu_detach_device(private->domain, dev);  in rockchip_drm_dma_detach_device()
92 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_dma_init_device()
95 		private->iommu_dev = ERR_PTR(-ENODEV);  in rockchip_drm_dma_init_device()
96 	else if (!private->iommu_dev)  in rockchip_drm_dma_init_device()
97 		private->iommu_dev = dev;  in rockchip_drm_dma_init_device()
102 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_drm_init_iommu()
106 	if (IS_ERR_OR_NULL(private->iommu_dev))  in rockchip_drm_init_iommu()
109 	private->domain = iommu_domain_alloc(private->iommu_dev->bus);  in rockchip_drm_init_iommu()
110 	if (!private->domain)  in rockchip_drm_init_iommu()
111 		return -ENOMEM;  in rockchip_drm_init_iommu()
113 	geometry = &private->domain->geometry;  in rockchip_drm_init_iommu()
114 	start = geometry->aperture_start;  in rockchip_drm_init_iommu()
115 	end = geometry->aperture_end;  in rockchip_drm_init_iommu()
117 	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",  in rockchip_drm_init_iommu()
119 	drm_mm_init(&private->mm, start, end - start + 1);  in rockchip_drm_init_iommu()
120 	mutex_init(&private->mm_lock);  in rockchip_drm_init_iommu()
127 	struct rockchip_drm_private *private = drm_dev->dev_private;  in rockchip_iommu_cleanup()
129 	if (!private->domain)  in rockchip_iommu_cleanup()
132 	drm_mm_takedown(&private->mm);  in rockchip_iommu_cleanup()
133 	iommu_domain_free(private->domain);  in rockchip_iommu_cleanup()
146 			      "Failed to remove existing framebuffers - %d.\n",  in rockchip_drm_bind()
157 	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);  in rockchip_drm_bind()
159 		ret = -ENOMEM;  in rockchip_drm_bind()
163 	drm_dev->dev_private = private;  in rockchip_drm_bind()
180 	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);  in rockchip_drm_bind()
282 		return -ENOENT;  in rockchip_drm_encoder_set_crtc_endpoint_id()
286 		return -ENOENT;  in rockchip_drm_encoder_set_crtc_endpoint_id()
292 	rkencoder->crtc_endpoint_id = ep.id;  in rockchip_drm_encoder_set_crtc_endpoint_id()
298  * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
302  * @ep: endpoint of a rockchip vop
304  * returns true if subdriver, false if external bridge and -ENODEV
315 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
317 	/* status disabled will prevent creation of platform-devices */  in rockchip_drm_endpoint_is_subdriver()
320 		return -ENODEV;  in rockchip_drm_endpoint_is_subdriver()
326 	/* enabled non-platform-devices can immediately return here */  in rockchip_drm_endpoint_is_subdriver()
331 	 * All rockchip subdrivers have probed at this point, so  in rockchip_drm_endpoint_is_subdriver()
334 	drv = pdev->dev.driver;  in rockchip_drm_endpoint_is_subdriver()
355 	list_for_each_entry(link, &dev->links.consumers, s_node)  in rockchip_drm_match_remove()
369 			d = platform_find_device_by_driver(p, &drv->driver);  in rockchip_drm_match_add()
384 	return match ?: ERR_PTR(-ENODEV);  in rockchip_drm_match_add()
394 	struct device_node *np = dev->of_node;  in rockchip_drm_platform_of_probe()
400 		return -ENODEV;  in rockchip_drm_platform_of_probe()
407 		if (!of_device_is_available(port->parent)) {  in rockchip_drm_platform_of_probe()
418 		return -ENODEV;  in rockchip_drm_platform_of_probe()
423 			      "No available vop found for display-subsystem.\n");  in rockchip_drm_platform_of_probe()
424 		return -ENODEV;  in rockchip_drm_platform_of_probe()
432 	struct device *dev = &pdev->dev;  in rockchip_drm_platform_probe()
455 	component_master_del(&pdev->dev, &rockchip_drm_ops);  in rockchip_drm_platform_remove()
457 	rockchip_drm_match_remove(&pdev->dev);  in rockchip_drm_platform_remove()
471 	{ .compatible = "rockchip,display-subsystem", },
481 		.name = "rockchip-drm",
498 		return -ENODEV;  in rockchip_drm_init()
544 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
545 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");