Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
13struct 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->cores = devm_kcalloc(dev, num_cores, sizeof(*rdev->cores), GFP_KERNEL);
35 if (!rdev->cores)
36 return ERR_PTR(-ENOMEM);
37
38 dma_set_max_seg_size(dev, UINT_MAX);
39
40 err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
41 if (err)
42 return ERR_PTR(err);
43
44 err = devm_mutex_init(dev, &rdev->sched_lock);
45 if (err)
46 return ERR_PTR(-ENOMEM);
47
48 err = drm_dev_register(ddev, 0);
49 if (err)
50 return ERR_PTR(err);
51
52 return rdev;
53}
54
55void rocket_device_fini(struct rocket_device *rdev)
56{
57 WARN_ON(rdev->num_cores > 0);
58
59 drm_dev_unregister(&rdev->ddev);
60}