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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <drm/drm_drv.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_prime.h>
#include "msm_drv.h"
#include "msm_gem.h"
#include "msm_kms.h"
static bool fbdev = true;
MODULE_PARM_DESC(fbdev, "Enable fbdev compat layer");
module_param(fbdev, bool, 0600);
/*
* fbdev funcs, to implement legacy fbdev interface on top of drm driver
*/
static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;
struct drm_gem_object *bo = msm_framebuffer_bo(helper->fb, 0);
return drm_gem_prime_mmap(bo, vma);
}
static void msm_fbdev_fb_destroy(struct fb_info *info)
{
struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;
struct drm_framebuffer *fb = helper->fb;
struct drm_gem_object *bo = msm_framebuffer_bo(fb, 0);
DBG();
drm_fb_helper_fini(helper);
/* this will free the backing object */
msm_gem_put_vaddr(bo);
drm_framebuffer_remove(fb);
drm_client_release(&helper->client);
drm_fb_helper_unprepare(helper);
kfree(helper);
}
static const struct fb_ops msm_fb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
/* Note: to properly handle manual update displays, we wrap the
* basic fbdev ops which write to the framebuffer
*/
.fb_read = drm_fb_helper_sys_read,
.fb_write = drm_fb_helper_sys_write,
.fb_fillrect = drm_fb_helper_sys_fillrect,
.fb_copyarea = drm_fb_helper_sys_copyarea,
.fb_imageblit = drm_fb_helper_sys_imageblit,
.fb_mmap = msm_fbdev_mmap,
.fb_destroy = msm_fbdev_fb_destroy,
};
static int msm_fbdev_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_device *dev = helper->dev;
struct msm_drm_private *priv = dev->dev_private;
struct drm_framebuffer *fb = NULL;
struct drm_gem_object *bo;
struct fb_info *fbi = NULL;
uint64_t paddr;
uint32_t format;
int ret, pitch;
format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
sizes->surface_height, sizes->surface_bpp,
sizes->fb_width, sizes->fb_height);
pitch = align_pitch(sizes->surface_width, sizes->surface_bpp);
fb = msm_alloc_stolen_fb(dev, sizes->surface_width,
sizes->surface_height, pitch, format);
if (IS_ERR(fb)) {
DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");
return PTR_ERR(fb);
}
bo = msm_framebuffer_bo(fb, 0);
/*
* NOTE: if we can be guaranteed to be able to map buffer
* in panic (ie. lock-safe, etc) we could avoid pinning the
* buffer now:
*/
ret = msm_gem_get_and_pin_iova(bo, priv->kms->aspace, &paddr);
if (ret) {
DRM_DEV_ERROR(dev->dev, "failed to get buffer obj iova: %d\n", ret);
goto fail;
}
fbi = drm_fb_helper_alloc_info(helper);
if (IS_ERR(fbi)) {
DRM_DEV_ERROR(dev->dev, "failed to allocate fb info\n");
ret = PTR_ERR(fbi);
goto fail;
}
DBG("fbi=%p, dev=%p", fbi, dev);
helper->fb = fb;
fbi->fbops = &msm_fb_ops;
drm_fb_helper_fill_info(fbi, helper, sizes);
fbi->screen_buffer = msm_gem_get_vaddr(bo);
if (IS_ERR(fbi->screen_buffer)) {
ret = PTR_ERR(fbi->screen_buffer);
goto fail;
}
fbi->screen_size = bo->size;
fbi->fix.smem_start = paddr;
fbi->fix.smem_len = bo->size;
DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
DBG("allocated %dx%d fb", fb->width, fb->height);
return 0;
fail:
drm_framebuffer_remove(fb);
return ret;
}
static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
.fb_probe = msm_fbdev_create,
};
/*
* struct drm_client
*/
static void msm_fbdev_client_unregister(struct drm_client_dev *client)
{
struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
if (fb_helper->info) {
drm_fb_helper_unregister_info(fb_helper);
} else {
drm_client_release(&fb_helper->client);
drm_fb_helper_unprepare(fb_helper);
kfree(fb_helper);
}
}
static int msm_fbdev_client_restore(struct drm_client_dev *client)
{
drm_fb_helper_lastclose(client->dev);
return 0;
}
static int msm_fbdev_client_hotplug(struct drm_client_dev *client)
{
struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
struct drm_device *dev = client->dev;
int ret;
if (dev->fb_helper)
return drm_fb_helper_hotplug_event(dev->fb_helper);
ret = drm_fb_helper_init(dev, fb_helper);
if (ret)
goto err_drm_err;
if (!drm_drv_uses_atomic_modeset(dev))
drm_helper_disable_unused_functions(dev);
ret = drm_fb_helper_initial_config(fb_helper);
if (ret)
goto err_drm_fb_helper_fini;
return 0;
err_drm_fb_helper_fini:
drm_fb_helper_fini(fb_helper);
err_drm_err:
drm_err(dev, "Failed to setup fbdev emulation (ret=%d)\n", ret);
return ret;
}
static const struct drm_client_funcs msm_fbdev_client_funcs = {
.owner = THIS_MODULE,
.unregister = msm_fbdev_client_unregister,
.restore = msm_fbdev_client_restore,
.hotplug = msm_fbdev_client_hotplug,
};
/* initialize fbdev helper */
void msm_fbdev_setup(struct drm_device *dev)
{
struct drm_fb_helper *helper;
int ret;
if (!fbdev)
return;
drm_WARN(dev, !dev->registered, "Device has not been registered.\n");
drm_WARN(dev, dev->fb_helper, "fb_helper is already set!\n");
helper = kzalloc(sizeof(*helper), GFP_KERNEL);
if (!helper)
return;
drm_fb_helper_prepare(dev, helper, 32, &msm_fb_helper_funcs);
ret = drm_client_init(dev, &helper->client, "fbdev", &msm_fbdev_client_funcs);
if (ret) {
drm_err(dev, "Failed to register client: %d\n", ret);
goto err_drm_fb_helper_unprepare;
}
ret = msm_fbdev_client_hotplug(&helper->client);
if (ret)
drm_dbg_kms(dev, "client hotplug ret=%d\n", ret);
drm_client_register(&helper->client);
return;
err_drm_fb_helper_unprepare:
drm_fb_helper_unprepare(helper);
kfree(helper);
}
|
