rockchip_drm_fb.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) Rockchip Electronics Co., Ltd.
 4 * Author:Mark Yao <mark.yao@rock-chips.com>
 5 */
 6
 7#include <linux/kernel.h>
 8
 9#include <drm/drm.h>
10#include <drm/drm_atomic.h>
11#include <drm/drm_damage_helper.h>
12#include <drm/drm_fourcc.h>
13#include <drm/drm_framebuffer.h>
14#include <drm/drm_gem_framebuffer_helper.h>
15#include <drm/drm_probe_helper.h>
16
17#include "rockchip_drm_drv.h"
18#include "rockchip_drm_fb.h"
19#include "rockchip_drm_gem.h"
20
21static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
22	.destroy       = drm_gem_fb_destroy,
23	.create_handle = drm_gem_fb_create_handle,
24	.dirty	       = drm_atomic_helper_dirtyfb,
25};
26
27static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
28	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
29};
30
31static struct drm_framebuffer *
32rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
33		   const struct drm_format_info *info,
34		   const struct drm_mode_fb_cmd2 *mode_cmd)
35{
36	struct drm_afbc_framebuffer *afbc_fb;
37	int ret;
38
39	afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL);
40	if (!afbc_fb)
41		return ERR_PTR(-ENOMEM);
42
43	ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base,
44					 file, info, mode_cmd,
45					 &rockchip_drm_fb_funcs);
46	if (ret) {
47		kfree(afbc_fb);
48		return ERR_PTR(ret);
49	}
50
51	if (drm_is_afbc(mode_cmd->modifier[0])) {
52		ret = drm_gem_fb_afbc_init(dev, info, mode_cmd, afbc_fb);
53		if (ret) {
54			drm_framebuffer_put(&afbc_fb->base);
55			return ERR_PTR(ret);
56		}
57	}
58
59	return &afbc_fb->base;
60}
61
62static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
63	.fb_create = rockchip_fb_create,
64	.atomic_check = drm_atomic_helper_check,
65	.atomic_commit = drm_atomic_helper_commit,
66};
67
68void rockchip_drm_mode_config_init(struct drm_device *dev)
69{
70	dev->mode_config.min_width = 0;
71	dev->mode_config.min_height = 0;
72
73	/*
74	 * set max width and height as default value(4096x4096).
75	 * this value would be used to check framebuffer size limitation
76	 * at drm_mode_addfb().
77	 */
78	dev->mode_config.max_width = 4096;
79	dev->mode_config.max_height = 4096;
80
81	dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
82	dev->mode_config.helper_private = &rockchip_mode_config_helpers;
83
84	dev->mode_config.normalize_zpos = true;
85}