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
|
/*
* Modularization
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include "drmP.h"
struct drmfb_par {
struct drm_device *dev;
struct drm_framebuffer *fb;
};
static int drmfb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct drmfb_par *par = info->par;
struct drm_framebuffer *fb = par->fb;
if (regno > 17)
return 1;
printk(KERN_INFO "Got set col reg %d %d %d %d\n", red, green, blue, regno);
if (regno < 16) {
switch (fb->depth) {
case 15:
fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11);
break;
case 16:
fb->pseudo_palette[regno] = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
case 24:
fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
(green & 0xff00) |
((blue & 0xff00) >> 8);
break;
}
}
return 0;
}
static struct fb_ops drmfb_ops = {
.owner = THIS_MODULE,
// .fb_open = drmfb_open,
// .fb_read = drmfb_read,
// .fb_write = drmfb_write,
// .fb_release = drmfb_release,
// .fb_ioctl = drmfb_ioctl,
.fb_setcolreg = drmfb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
int drmfb_probe(struct drm_device *dev, struct drm_framebuffer *fb)
{
struct fb_info *info;
struct drmfb_par *par;
struct device *device = &dev->pdev->dev;
struct fb_var_screeninfo *var_info;
unsigned long base, size;
info = framebuffer_alloc(sizeof(struct drmfb_par), device);
if (!info){
return -EINVAL;
}
fb->fbdev = info;
par = info->par;
par->dev = dev;
par->fb = fb;
info->fbops = &drmfb_ops;
strcpy(info->fix.id, "drmfb");
info->fix.smem_start = fb->offset + dev->mode_config.fb_base;
info->fix.smem_len = (8*1024*1024);
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_DIRECTCOLOR;
info->fix.type_aux = 0;
info->fix.mmio_start = 0;
info->fix.mmio_len = 0;
info->fix.line_length = fb->pitch;
info->flags = FBINFO_DEFAULT;
base = fb->bo->offset + dev->mode_config.fb_base;
size = (fb->bo->mem.num_pages * PAGE_SIZE);
DRM_DEBUG("remapping %08X %d\n", base, size);
fb->virtual_base = ioremap_nocache(base, size);
info->screen_base = fb->virtual_base;
info->screen_size = size;
info->pseudo_palette = fb->pseudo_palette;
info->var.xres = fb->width;
info->var.xres_virtual = fb->pitch;
info->var.yres = fb->height;
info->var.yres_virtual = fb->height;
info->var.bits_per_pixel = fb->bits_per_pixel;
info->var.xoffset = 0;
info->var.yoffset = 0;
switch(fb->depth) {
case 8:
case 15:
case 16:
break;
case 24:
case 32:
info->var.red.offset = 16;
info->var.green.offset = 8;
info->var.blue.offset = 0;
info->var.red.length = info->var.green.length =
info->var.blue.length = 8;
if (fb->depth == 32) {
info->var.transp.offset = 24;
info->var.transp.length = 8;
}
break;
}
if (register_framebuffer(info) < 0)
return -EINVAL;
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
info->fix.id);
return 0;
}
EXPORT_SYMBOL(drmfb_probe);
int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
{
struct fb_info *info = fb->fbdev;
if (info) {
iounmap(fb->virtual_base);
unregister_framebuffer(info);
framebuffer_release(info);
}
return 0;
}
EXPORT_SYMBOL(drmfb_remove);
MODULE_LICENSE("GPL");
|
