rocket_device.c

 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}