1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Hisilicon Hibmc SoC drm driver
3 *
4 * Based on the bochs drm driver.
5 *
6 * Copyright (c) 2016 Huawei Limited.
7 *
8 * Author:
9 *	Rongrong Zou <zourongrong@huawei.com>
10 *	Rongrong Zou <zourongrong@gmail.com>
11 *	Jianhua Li <lijianhua@huawei.com>
12 */
13
14#include <linux/pci.h>
15
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_gem.h>
18#include <drm/drm_gem_framebuffer_helper.h>
19#include <drm/drm_gem_vram_helper.h>
20#include <drm/drm_print.h>
21
22#include "hibmc_drm_drv.h"
23
24int hibmc_mm_init(struct hibmc_drm_private *hibmc)
25{
26	struct drm_vram_mm *vmm;
27	int ret;
28	struct drm_device *dev = hibmc->dev;
29
30	vmm = drm_vram_helper_alloc_mm(dev,
31				       pci_resource_start(dev->pdev, 0),
32				       hibmc->fb_size);
33	if (IS_ERR(vmm)) {
34		ret = PTR_ERR(vmm);
35		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
36		return ret;
37	}
38
39	return 0;
40}
41
42void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
43{
44	if (!hibmc->dev->vram_mm)
45		return;
46
47	drm_vram_helper_release_mm(hibmc->dev);
48}
49
50int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
51		      struct drm_mode_create_dumb *args)
52{
53	return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
54}
55
56const struct drm_mode_config_funcs hibmc_mode_funcs = {
57	.mode_valid = drm_vram_helper_mode_valid,
58	.atomic_check = drm_atomic_helper_check,
59	.atomic_commit = drm_atomic_helper_commit,
60	.fb_create = drm_gem_fb_create,
61};
62