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7#include <drm/drm_crtc.h>
8#include <drm/drm_fb_helper.h>
9
10#include "msm_drv.h"
11#include "msm_kms.h"
12
13extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
14 struct vm_area_struct *vma);
15static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma);
16
17
18
19
20
21#define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base)
22
23struct msm_fbdev {
24 struct drm_fb_helper base;
25 struct drm_framebuffer *fb;
26};
27
28static struct fb_ops msm_fb_ops = {
29 .owner = THIS_MODULE,
30 DRM_FB_HELPER_DEFAULT_OPS,
31
32
33
34
35 .fb_read = drm_fb_helper_sys_read,
36 .fb_write = drm_fb_helper_sys_write,
37 .fb_fillrect = drm_fb_helper_sys_fillrect,
38 .fb_copyarea = drm_fb_helper_sys_copyarea,
39 .fb_imageblit = drm_fb_helper_sys_imageblit,
40 .fb_mmap = msm_fbdev_mmap,
41};
42
43static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
44{
45 struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;
46 struct msm_fbdev *fbdev = to_msm_fbdev(helper);
47 struct drm_gem_object *bo = msm_framebuffer_bo(fbdev->fb, 0);
48 int ret = 0;
49
50 ret = drm_gem_mmap_obj(bo, bo->size, vma);
51 if (ret) {
52 pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
53 return ret;
54 }
55
56 return msm_gem_mmap_obj(bo, vma);
57}
58
59static int msm_fbdev_create(struct drm_fb_helper *helper,
60 struct drm_fb_helper_surface_size *sizes)
61{
62 struct msm_fbdev *fbdev = to_msm_fbdev(helper);
63 struct drm_device *dev = helper->dev;
64 struct msm_drm_private *priv = dev->dev_private;
65 struct drm_framebuffer *fb = NULL;
66 struct drm_gem_object *bo;
67 struct fb_info *fbi = NULL;
68 uint64_t paddr;
69 uint32_t format;
70 int ret, pitch;
71
72 format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
73
74 DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
75 sizes->surface_height, sizes->surface_bpp,
76 sizes->fb_width, sizes->fb_height);
77
78 pitch = align_pitch(sizes->surface_width, sizes->surface_bpp);
79 fb = msm_alloc_stolen_fb(dev, sizes->surface_width,
80 sizes->surface_height, pitch, format);
81
82 if (IS_ERR(fb)) {
83 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");
84 return PTR_ERR(fb);
85 }
86
87 bo = msm_framebuffer_bo(fb, 0);
88
89 mutex_lock(&dev->struct_mutex);
90
91
92
93
94
95
96 ret = msm_gem_get_and_pin_iova(bo, priv->kms->aspace, &paddr);
97 if (ret) {
98 DRM_DEV_ERROR(dev->dev, "failed to get buffer obj iova: %d\n", ret);
99 goto fail_unlock;
100 }
101
102 fbi = drm_fb_helper_alloc_fbi(helper);
103 if (IS_ERR(fbi)) {
104 DRM_DEV_ERROR(dev->dev, "failed to allocate fb info\n");
105 ret = PTR_ERR(fbi);
106 goto fail_unlock;
107 }
108
109 DBG("fbi=%p, dev=%p", fbi, dev);
110
111 fbdev->fb = fb;
112 helper->fb = fb;
113
114 fbi->fbops = &msm_fb_ops;
115
116 drm_fb_helper_fill_info(fbi, helper, sizes);
117
118 dev->mode_config.fb_base = paddr;
119
120 fbi->screen_base = msm_gem_get_vaddr(bo);
121 if (IS_ERR(fbi->screen_base)) {
122 ret = PTR_ERR(fbi->screen_base);
123 goto fail_unlock;
124 }
125 fbi->screen_size = bo->size;
126 fbi->fix.smem_start = paddr;
127 fbi->fix.smem_len = bo->size;
128
129 DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
130 DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);
131
132 mutex_unlock(&dev->struct_mutex);
133
134 return 0;
135
136fail_unlock:
137 mutex_unlock(&dev->struct_mutex);
138 drm_framebuffer_remove(fb);
139 return ret;
140}
141
142static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
143 .fb_probe = msm_fbdev_create,
144};
145
146
147struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
148{
149 struct msm_drm_private *priv = dev->dev_private;
150 struct msm_fbdev *fbdev = NULL;
151 struct drm_fb_helper *helper;
152 int ret;
153
154 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
155 if (!fbdev)
156 goto fail;
157
158 helper = &fbdev->base;
159
160 drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs);
161
162 ret = drm_fb_helper_init(dev, helper, priv->num_connectors);
163 if (ret) {
164 DRM_DEV_ERROR(dev->dev, "could not init fbdev: ret=%d\n", ret);
165 goto fail;
166 }
167
168 ret = drm_fb_helper_single_add_all_connectors(helper);
169 if (ret)
170 goto fini;
171
172 ret = drm_fb_helper_initial_config(helper, 32);
173 if (ret)
174 goto fini;
175
176 priv->fbdev = helper;
177
178 return helper;
179
180fini:
181 drm_fb_helper_fini(helper);
182fail:
183 kfree(fbdev);
184 return NULL;
185}
186
187void msm_fbdev_free(struct drm_device *dev)
188{
189 struct msm_drm_private *priv = dev->dev_private;
190 struct drm_fb_helper *helper = priv->fbdev;
191 struct msm_fbdev *fbdev;
192
193 DBG();
194
195 drm_fb_helper_unregister_fbi(helper);
196
197 drm_fb_helper_fini(helper);
198
199 fbdev = to_msm_fbdev(priv->fbdev);
200
201
202 if (fbdev->fb) {
203 struct drm_gem_object *bo =
204 msm_framebuffer_bo(fbdev->fb, 0);
205 msm_gem_put_vaddr(bo);
206 drm_framebuffer_remove(fbdev->fb);
207 }
208
209 kfree(fbdev);
210
211 priv->fbdev = NULL;
212}
213