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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// 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/console.h>
#include <linux/dma-mapping.h>
#include <linux/vmalloc.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_prime.h>
#include <drm/drm_probe_helper.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_fbdev.h"
#define MAX_CONNECTOR 4
#define PREFERRED_BPP 32
#define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
drm_fb_helper)
struct exynos_drm_fbdev {
struct drm_fb_helper drm_fb_helper;
struct exynos_drm_gem *exynos_gem;
};
static int exynos_drm_fb_mmap(struct fb_info *info,
struct vm_area_struct *vma)
{
struct drm_fb_helper *helper = info->par;
struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
return drm_gem_prime_mmap(&exynos_gem->base, vma);
}
static const struct fb_ops exynos_drm_fb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_mmap = exynos_drm_fb_mmap,
.fb_fillrect = drm_fb_helper_cfb_fillrect,
.fb_copyarea = drm_fb_helper_cfb_copyarea,
.fb_imageblit = drm_fb_helper_cfb_imageblit,
};
static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes,
struct exynos_drm_gem *exynos_gem)
{
struct fb_info *fbi;
struct drm_framebuffer *fb = helper->fb;
unsigned int size = fb->width * fb->height * fb->format->cpp[0];
unsigned long offset;
fbi = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(fbi)) {
DRM_DEV_ERROR(to_dma_dev(helper->dev),
"failed to allocate fb info.\n");
return PTR_ERR(fbi);
}
fbi->fbops = &exynos_drm_fb_ops;
drm_fb_helper_fill_info(fbi, helper, sizes);
offset = fbi->var.xoffset * fb->format->cpp[0];
offset += fbi->var.yoffset * fb->pitches[0];
fbi->screen_buffer = exynos_gem->kvaddr + offset;
fbi->screen_size = size;
fbi->fix.smem_len = size;
return 0;
}
static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
struct exynos_drm_gem *exynos_gem;
struct drm_device *dev = helper->dev;
struct drm_mode_fb_cmd2 mode_cmd = { 0 };
unsigned long size;
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);
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = mode_cmd.pitches[0] * mode_cmd.height;
exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_WC, size, true);
if (IS_ERR(exynos_gem))
return PTR_ERR(exynos_gem);
exynos_fbdev->exynos_gem = exynos_gem;
helper->fb =
exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1);
if (IS_ERR(helper->fb)) {
DRM_DEV_ERROR(dev->dev, "failed to create drm framebuffer.\n");
ret = PTR_ERR(helper->fb);
goto err_destroy_gem;
}
ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem);
if (ret < 0)
goto err_destroy_framebuffer;
return ret;
err_destroy_framebuffer:
drm_framebuffer_cleanup(helper->fb);
err_destroy_gem:
exynos_drm_gem_destroy(exynos_gem);
/*
* if failed, all resources allocated above would be released by
* drm_mode_config_cleanup() when drm_load() had been called prior
* to any specific driver such as fimd or hdmi driver.
*/
return ret;
}
static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
.fb_probe = exynos_drm_fbdev_create,
};
int exynos_drm_fbdev_init(struct drm_device *dev)
{
struct exynos_drm_fbdev *fbdev;
struct exynos_drm_private *private = dev->dev_private;
struct drm_fb_helper *helper;
int ret;
if (!dev->mode_config.num_crtc)
return 0;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev)
return -ENOMEM;
private->fb_helper = helper = &fbdev->drm_fb_helper;
drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs);
ret = drm_fb_helper_init(dev, helper);
if (ret < 0) {
DRM_DEV_ERROR(dev->dev,
"failed to initialize drm fb helper.\n");
goto err_init;
}
ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
if (ret < 0) {
DRM_DEV_ERROR(dev->dev,
"failed to set up hw configuration.\n");
goto err_setup;
}
return 0;
err_setup:
drm_fb_helper_fini(helper);
err_init:
private->fb_helper = NULL;
kfree(fbdev);
return ret;
}
static void exynos_drm_fbdev_destroy(struct drm_device *dev,
struct drm_fb_helper *fb_helper)
{
struct drm_framebuffer *fb;
/* release drm framebuffer and real buffer */
if (fb_helper->fb && fb_helper->fb->funcs) {
fb = fb_helper->fb;
if (fb)
drm_framebuffer_remove(fb);
}
drm_fb_helper_unregister_fbi(fb_helper);
drm_fb_helper_fini(fb_helper);
}
void exynos_drm_fbdev_fini(struct drm_device *dev)
{
struct exynos_drm_private *private = dev->dev_private;
struct exynos_drm_fbdev *fbdev;
if (!private || !private->fb_helper)
return;
fbdev = to_exynos_fbdev(private->fb_helper);
exynos_drm_fbdev_destroy(dev, private->fb_helper);
kfree(fbdev);
private->fb_helper = NULL;
}
|
