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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include "msm_drv.h"
#include "msm_kms.h"
extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
struct vm_area_struct *vma);
static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma);
/*
* fbdev funcs, to implement legacy fbdev interface on top of drm driver
*/
#define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base)
struct msm_fbdev {
struct drm_fb_helper base;
struct drm_framebuffer *fb;
};
static 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,
};
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 msm_fbdev *fbdev = to_msm_fbdev(helper);
struct drm_gem_object *bo = msm_framebuffer_bo(fbdev->fb, 0);
int ret = 0;
ret = drm_gem_mmap_obj(bo, bo->size, vma);
if (ret) {
pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
return ret;
}
return msm_gem_mmap_obj(bo, vma);
}
static int msm_fbdev_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct msm_fbdev *fbdev = to_msm_fbdev(helper);
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);
mutex_lock(&dev->struct_mutex);
/*
* 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_unlock;
}
fbi = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(fbi)) {
DRM_DEV_ERROR(dev->dev, "failed to allocate fb info\n");
ret = PTR_ERR(fbi);
goto fail_unlock;
}
DBG("fbi=%p, dev=%p", fbi, dev);
fbdev->fb = fb;
helper->fb = fb;
fbi->fbops = &msm_fb_ops;
drm_fb_helper_fill_info(fbi, helper, sizes);
dev->mode_config.fb_base = paddr;
fbi->screen_base = msm_gem_get_vaddr(bo);
if (IS_ERR(fbi->screen_base)) {
ret = PTR_ERR(fbi->screen_base);
goto fail_unlock;
}
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", fbdev->fb->width, fbdev->fb->height);
mutex_unlock(&dev->struct_mutex);
return 0;
fail_unlock:
mutex_unlock(&dev->struct_mutex);
drm_framebuffer_remove(fb);
return ret;
}
static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
.fb_probe = msm_fbdev_create,
};
/* initialize fbdev helper */
struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
{
struct msm_drm_private *priv = dev->dev_private;
struct msm_fbdev *fbdev = NULL;
struct drm_fb_helper *helper;
int ret;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev)
goto fail;
helper = &fbdev->base;
drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs);
ret = drm_fb_helper_init(dev, helper, priv->num_connectors);
if (ret) {
DRM_DEV_ERROR(dev->dev, "could not init fbdev: ret=%d\n", ret);
goto fail;
}
ret = drm_fb_helper_single_add_all_connectors(helper);
if (ret)
goto fini;
/* the fw fb could be anywhere in memory */
drm_fb_helper_remove_conflicting_framebuffers(NULL, "msm", false);
ret = drm_fb_helper_initial_config(helper, 32);
if (ret)
goto fini;
priv->fbdev = helper;
return helper;
fini:
drm_fb_helper_fini(helper);
fail:
kfree(fbdev);
return NULL;
}
void msm_fbdev_free(struct drm_device *dev)
{
struct msm_drm_private *priv = dev->dev_private;
struct drm_fb_helper *helper = priv->fbdev;
struct msm_fbdev *fbdev;
DBG();
drm_fb_helper_unregister_fbi(helper);
drm_fb_helper_fini(helper);
fbdev = to_msm_fbdev(priv->fbdev);
/* this will free the backing object */
if (fbdev->fb) {
struct drm_gem_object *bo =
msm_framebuffer_bo(fbdev->fb, 0);
msm_gem_put_vaddr(bo);
drm_framebuffer_remove(fbdev->fb);
}
kfree(fbdev);
priv->fbdev = NULL;
}
|
