1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright 2024-2025 Tomeu Vizoso <tomeu@tomeuvizoso.net> */ 3 4 #include <drm/drm_drv.h> 5 #include <linux/array_size.h> 6 #include <linux/clk.h> 7 #include <linux/dma-mapping.h> 8 #include <linux/platform_device.h> 9 #include <linux/of.h> 10 11 #include "rocket_device.h" 12 13 struct rocket_device *rocket_device_init(struct platform_device *pdev, 14 const struct drm_driver *rocket_drm_driver) 15 { 16 struct device *dev = &pdev->dev; 17 struct device_node *core_node; 18 struct rocket_device *rdev; 19 struct drm_device *ddev; 20 unsigned int num_cores = 0; 21 int err; 22 23 rdev = devm_drm_dev_alloc(dev, rocket_drm_driver, struct rocket_device, ddev); 24 if (IS_ERR(rdev)) 25 return rdev; 26 27 ddev = &rdev->ddev; 28 dev_set_drvdata(dev, rdev); 29 30 for_each_compatible_node(core_node, NULL, "rockchip,rk3588-rknn-core") 31 if (of_device_is_available(core_node)) 32 num_cores++; 33 34 rdev->max_cores = num_cores; 35 36 rdev->cores = devm_kcalloc(dev, num_cores, sizeof(*rdev->cores), GFP_KERNEL); 37 if (!rdev->cores) 38 return ERR_PTR(-ENOMEM); 39 40 dma_set_max_seg_size(dev, UINT_MAX); 41 42 err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40)); 43 if (err) 44 return ERR_PTR(err); 45 46 err = devm_mutex_init(dev, &rdev->sched_lock); 47 if (err) 48 return ERR_PTR(-ENOMEM); 49 50 err = drm_dev_register(ddev, 0); 51 if (err) 52 return ERR_PTR(err); 53 54 return rdev; 55 } 56 57 void rocket_device_fini(struct rocket_device *rdev) 58 { 59 WARN_ON(rdev->num_cores > 0); 60 61 drm_dev_unregister(&rdev->ddev); 62 } 63