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-or-later
/* exynos_drm_fbdev.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authors:
* Inki Dae <inki.dae@samsung.com>
* Joonyoung Shim <jy0922.shim@samsung.com>
* Seung-Woo Kim <sw0312.kim@samsung.com>
*/
#include <linux/fb.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_prime.h>
#include <drm/drm_print.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_fbdev.h"
#include "exynos_drm_gem.h"
#define MAX_CONNECTOR 4
static int exynos_drm_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct drm_fb_helper *helper = info->par;
struct drm_gem_object *obj = drm_gem_fb_get_obj(helper->fb, 0);
return drm_gem_prime_mmap(obj, vma);
}
static void exynos_drm_fb_destroy(struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
drm_fb_helper_fini(fb_helper);
drm_client_buffer_delete(fb_helper->buffer);
drm_client_release(&fb_helper->client);
}
static const struct fb_ops exynos_drm_fb_ops = {
.owner = THIS_MODULE,
__FB_DEFAULT_DMAMEM_OPS_RDWR,
DRM_FB_HELPER_DEFAULT_OPS,
__FB_DEFAULT_DMAMEM_OPS_DRAW,
.fb_mmap = exynos_drm_fb_mmap,
.fb_destroy = exynos_drm_fb_destroy,
};
static const struct drm_fb_helper_funcs exynos_drm_fbdev_helper_funcs = {
};
int exynos_drm_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_client_dev *client = &helper->client;
struct drm_device *dev = client->dev;
struct drm_file *file = client->file;
struct fb_info *info = helper->info;
u32 fourcc, pitch;
u64 size;
const struct drm_format_info *format;
struct exynos_drm_gem *exynos_gem;
struct drm_gem_object *obj;
struct drm_client_buffer *buffer;
u32 handle;
int ret;
DRM_DEV_DEBUG_KMS(dev->dev,
"surface width(%d), height(%d) and bpp(%d\n",
sizes->surface_width, sizes->surface_height,
sizes->surface_bpp);
fourcc = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
if (fourcc == DRM_FORMAT_INVALID)
return -EINVAL;
format = drm_get_format_info(dev, fourcc, DRM_FORMAT_MOD_LINEAR);
if (!format)
return -EINVAL;
pitch = drm_format_info_min_pitch(format, 0, sizes->surface_width);
if (!pitch)
return -EINVAL;
if (check_mul_overflow(pitch, sizes->surface_height, &size))
return -EINVAL;
size = ALIGN(size, PAGE_SIZE);
if (size < PAGE_SIZE)
return -EINVAL;
exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_WC, size, true);
if (IS_ERR(exynos_gem))
return PTR_ERR(exynos_gem);
obj = &exynos_gem->base;
ret = drm_gem_handle_create(file, obj, &handle);
if (ret)
goto err_drm_gem_object_put;
buffer = drm_client_buffer_create(client, sizes->surface_width, sizes->surface_height,
fourcc, handle, pitch);
if (IS_ERR(buffer)) {
ret = PTR_ERR(buffer);
goto err_drm_gem_handle_delete;
}
helper->funcs = &exynos_drm_fbdev_helper_funcs;
helper->buffer = buffer;
helper->fb = buffer->fb;
info->fbops = &exynos_drm_fb_ops;
drm_fb_helper_fill_info(info, helper, sizes);
info->flags |= FBINFO_VIRTFB;
info->screen_buffer = exynos_gem->kvaddr;
info->screen_size = obj->size;
info->fix.smem_len = obj->size;
/* The handle is only needed for creating the framebuffer. */
drm_gem_handle_delete(file, handle);
/* The framebuffer still holds a reference on the GEM object. */
drm_gem_object_put(obj);
return 0;
err_drm_gem_handle_delete:
drm_gem_handle_delete(file, handle);
err_drm_gem_object_put:
drm_gem_object_put(obj);
return ret;
}
|
