summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
blob: 9b13c784b3475280483cd621f79f2c72d7349479 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <mark.yao@rock-chips.com>
 */

#include <linux/kernel.h>

#include <drm/drm.h>
#include <drm/drm_atomic.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>

#include "rockchip_drm_drv.h"
#include "rockchip_drm_fb.h"
#include "rockchip_drm_gem.h"

static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
	.destroy       = drm_gem_fb_destroy,
	.create_handle = drm_gem_fb_create_handle,
	.dirty	       = drm_atomic_helper_dirtyfb,
};

static struct drm_framebuffer *
rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
		  struct drm_gem_object **obj, unsigned int num_planes)
{
	struct drm_framebuffer *fb;
	int ret;
	int i;

	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
	if (!fb)
		return ERR_PTR(-ENOMEM);

	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);

	for (i = 0; i < num_planes; i++)
		fb->obj[i] = obj[i];

	ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs);
	if (ret) {
		DRM_DEV_ERROR(dev->dev,
			      "Failed to initialize framebuffer: %d\n",
			      ret);
		kfree(fb);
		return ERR_PTR(ret);
	}

	return fb;
}

static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};

static struct drm_framebuffer *
rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
		   const struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_afbc_framebuffer *afbc_fb;
	const struct drm_format_info *info;
	int ret;

	info = drm_get_format_info(dev, mode_cmd);
	if (!info)
		return ERR_PTR(-ENOMEM);

	afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL);
	if (!afbc_fb)
		return ERR_PTR(-ENOMEM);

	ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base, file, mode_cmd,
					 &rockchip_drm_fb_funcs);
	if (ret) {
		kfree(afbc_fb);
		return ERR_PTR(ret);
	}

	if (drm_is_afbc(mode_cmd->modifier[0])) {
		int ret, i;

		ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb);
		if (ret) {
			struct drm_gem_object **obj = afbc_fb->base.obj;

			for (i = 0; i < info->num_planes; ++i)
				drm_gem_object_put_unlocked(obj[i]);

			kfree(afbc_fb);
			return ERR_PTR(ret);
		}
	}

	return &afbc_fb->base;
}

static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
	.fb_create = rockchip_fb_create,
	.output_poll_changed = drm_fb_helper_output_poll_changed,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

struct drm_framebuffer *
rockchip_drm_framebuffer_init(struct drm_device *dev,
			      const struct drm_mode_fb_cmd2 *mode_cmd,
			      struct drm_gem_object *obj)
{
	struct drm_framebuffer *fb;

	fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
	if (IS_ERR(fb))
		return ERR_CAST(fb);

	return fb;
}

void rockchip_drm_mode_config_init(struct drm_device *dev)
{
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	/*
	 * set max width and height as default value(4096x4096).
	 * this value would be used to check framebuffer size limitation
	 * at drm_mode_addfb().
	 */
	dev->mode_config.max_width = 4096;
	dev->mode_config.max_height = 4096;

	dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
	dev->mode_config.helper_private = &rockchip_mode_config_helpers;
}