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5
6#include <linux/errno.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9
10#include <drm/drm_fb_helper.h>
11#include "armada_crtc.h"
12#include "armada_drm.h"
13#include "armada_fb.h"
14#include "armada_gem.h"
15
16static struct fb_ops armada_fb_ops = {
17 .owner = THIS_MODULE,
18 DRM_FB_HELPER_DEFAULT_OPS,
19 .fb_fillrect = drm_fb_helper_cfb_fillrect,
20 .fb_copyarea = drm_fb_helper_cfb_copyarea,
21 .fb_imageblit = drm_fb_helper_cfb_imageblit,
22};
23
24static int armada_fbdev_create(struct drm_fb_helper *fbh,
25 struct drm_fb_helper_surface_size *sizes)
26{
27 struct drm_device *dev = fbh->dev;
28 struct drm_mode_fb_cmd2 mode;
29 struct armada_framebuffer *dfb;
30 struct armada_gem_object *obj;
31 struct fb_info *info;
32 int size, ret;
33 void *ptr;
34
35 memset(&mode, 0, sizeof(mode));
36 mode.width = sizes->surface_width;
37 mode.height = sizes->surface_height;
38 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
39 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
40 sizes->surface_depth);
41
42 size = mode.pitches[0] * mode.height;
43 obj = armada_gem_alloc_private_object(dev, size);
44 if (!obj) {
45 DRM_ERROR("failed to allocate fb memory\n");
46 return -ENOMEM;
47 }
48
49 ret = armada_gem_linear_back(dev, obj);
50 if (ret) {
51 drm_gem_object_put_unlocked(&obj->obj);
52 return ret;
53 }
54
55 ptr = armada_gem_map_object(dev, obj);
56 if (!ptr) {
57 drm_gem_object_put_unlocked(&obj->obj);
58 return -ENOMEM;
59 }
60
61 dfb = armada_framebuffer_create(dev, &mode, obj);
62
63
64
65
66
67 drm_gem_object_put_unlocked(&obj->obj);
68
69 if (IS_ERR(dfb))
70 return PTR_ERR(dfb);
71
72 info = drm_fb_helper_alloc_fbi(fbh);
73 if (IS_ERR(info)) {
74 ret = PTR_ERR(info);
75 goto err_fballoc;
76 }
77
78 info->fbops = &armada_fb_ops;
79 info->fix.smem_start = obj->phys_addr;
80 info->fix.smem_len = obj->obj.size;
81 info->screen_size = obj->obj.size;
82 info->screen_base = ptr;
83 fbh->fb = &dfb->fb;
84
85 drm_fb_helper_fill_info(info, fbh, sizes);
86
87 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
88 dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
89 (unsigned long long)obj->phys_addr);
90
91 return 0;
92
93 err_fballoc:
94 dfb->fb.funcs->destroy(&dfb->fb);
95 return ret;
96}
97
98static int armada_fb_probe(struct drm_fb_helper *fbh,
99 struct drm_fb_helper_surface_size *sizes)
100{
101 int ret = 0;
102
103 if (!fbh->fb) {
104 ret = armada_fbdev_create(fbh, sizes);
105 if (ret == 0)
106 ret = 1;
107 }
108 return ret;
109}
110
111static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
112 .fb_probe = armada_fb_probe,
113};
114
115int armada_fbdev_init(struct drm_device *dev)
116{
117 struct armada_private *priv = dev->dev_private;
118 struct drm_fb_helper *fbh;
119 int ret;
120
121 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
122 if (!fbh)
123 return -ENOMEM;
124
125 priv->fbdev = fbh;
126
127 drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
128
129 ret = drm_fb_helper_init(dev, fbh, 1);
130 if (ret) {
131 DRM_ERROR("failed to initialize drm fb helper\n");
132 goto err_fb_helper;
133 }
134
135 ret = drm_fb_helper_single_add_all_connectors(fbh);
136 if (ret) {
137 DRM_ERROR("failed to add fb connectors\n");
138 goto err_fb_setup;
139 }
140
141 ret = drm_fb_helper_initial_config(fbh, 32);
142 if (ret) {
143 DRM_ERROR("failed to set initial config\n");
144 goto err_fb_setup;
145 }
146
147 return 0;
148 err_fb_setup:
149 drm_fb_helper_fini(fbh);
150 err_fb_helper:
151 priv->fbdev = NULL;
152 return ret;
153}
154
155void armada_fbdev_fini(struct drm_device *dev)
156{
157 struct armada_private *priv = dev->dev_private;
158 struct drm_fb_helper *fbh = priv->fbdev;
159
160 if (fbh) {
161 drm_fb_helper_unregister_fbi(fbh);
162
163 drm_fb_helper_fini(fbh);
164
165 if (fbh->fb)
166 fbh->fb->funcs->destroy(fbh->fb);
167
168 priv->fbdev = NULL;
169 }
170}
171
