Commit | Line | Data |
---|---|---|
c8afe684 RC |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include "msm_drv.h" | |
19 | ||
20 | #include "drm_crtc.h" | |
21 | #include "drm_fb_helper.h" | |
8f67da33 HL |
22 | #include "msm_gem.h" |
23 | ||
24 | extern int msm_gem_mmap_obj(struct drm_gem_object *obj, | |
25 | struct vm_area_struct *vma); | |
26 | static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma); | |
c8afe684 RC |
27 | |
28 | /* | |
29 | * fbdev funcs, to implement legacy fbdev interface on top of drm driver | |
30 | */ | |
31 | ||
32 | #define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base) | |
33 | ||
34 | struct msm_fbdev { | |
35 | struct drm_fb_helper base; | |
36 | struct drm_framebuffer *fb; | |
37 | struct drm_gem_object *bo; | |
38 | }; | |
39 | ||
40 | static struct fb_ops msm_fb_ops = { | |
41 | .owner = THIS_MODULE, | |
42 | ||
43 | /* Note: to properly handle manual update displays, we wrap the | |
44 | * basic fbdev ops which write to the framebuffer | |
45 | */ | |
46 | .fb_read = fb_sys_read, | |
47 | .fb_write = fb_sys_write, | |
48 | .fb_fillrect = sys_fillrect, | |
49 | .fb_copyarea = sys_copyarea, | |
50 | .fb_imageblit = sys_imageblit, | |
8f67da33 | 51 | .fb_mmap = msm_fbdev_mmap, |
c8afe684 RC |
52 | |
53 | .fb_check_var = drm_fb_helper_check_var, | |
54 | .fb_set_par = drm_fb_helper_set_par, | |
55 | .fb_pan_display = drm_fb_helper_pan_display, | |
56 | .fb_blank = drm_fb_helper_blank, | |
57 | .fb_setcmap = drm_fb_helper_setcmap, | |
58 | }; | |
59 | ||
8f67da33 HL |
60 | static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma) |
61 | { | |
62 | struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par; | |
63 | struct msm_fbdev *fbdev = to_msm_fbdev(helper); | |
64 | struct drm_gem_object *drm_obj = fbdev->bo; | |
65 | struct drm_device *dev = helper->dev; | |
66 | int ret = 0; | |
67 | ||
68 | if (drm_device_is_unplugged(dev)) | |
69 | return -ENODEV; | |
70 | ||
71 | mutex_lock(&dev->struct_mutex); | |
72 | ||
73 | ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma); | |
74 | ||
75 | mutex_unlock(&dev->struct_mutex); | |
76 | ||
77 | if (ret) { | |
78 | pr_err("%s:drm_gem_mmap_obj fail\n", __func__); | |
79 | return ret; | |
80 | } | |
81 | ||
82 | return msm_gem_mmap_obj(drm_obj, vma); | |
83 | } | |
84 | ||
c8afe684 RC |
85 | static int msm_fbdev_create(struct drm_fb_helper *helper, |
86 | struct drm_fb_helper_surface_size *sizes) | |
87 | { | |
88 | struct msm_fbdev *fbdev = to_msm_fbdev(helper); | |
89 | struct drm_device *dev = helper->dev; | |
90 | struct drm_framebuffer *fb = NULL; | |
91 | struct fb_info *fbi = NULL; | |
92 | struct drm_mode_fb_cmd2 mode_cmd = {0}; | |
2557e2d7 | 93 | uint32_t paddr; |
c8afe684 RC |
94 | int ret, size; |
95 | ||
c8afe684 RC |
96 | DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width, |
97 | sizes->surface_height, sizes->surface_bpp, | |
98 | sizes->fb_width, sizes->fb_height); | |
99 | ||
100 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
101 | sizes->surface_depth); | |
102 | ||
103 | mode_cmd.width = sizes->surface_width; | |
104 | mode_cmd.height = sizes->surface_height; | |
105 | ||
106 | mode_cmd.pitches[0] = align_pitch( | |
107 | mode_cmd.width, sizes->surface_bpp); | |
108 | ||
109 | /* allocate backing bo */ | |
110 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
111 | DBG("allocating %d bytes for fb %d", size, dev->primary->index); | |
112 | mutex_lock(&dev->struct_mutex); | |
113 | fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); | |
114 | mutex_unlock(&dev->struct_mutex); | |
115 | if (IS_ERR(fbdev->bo)) { | |
116 | ret = PTR_ERR(fbdev->bo); | |
117 | fbdev->bo = NULL; | |
118 | dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret); | |
119 | goto fail; | |
120 | } | |
121 | ||
122 | fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo); | |
123 | if (IS_ERR(fb)) { | |
124 | dev_err(dev->dev, "failed to allocate fb\n"); | |
125 | /* note: if fb creation failed, we can't rely on fb destroy | |
126 | * to unref the bo: | |
127 | */ | |
128 | drm_gem_object_unreference(fbdev->bo); | |
129 | ret = PTR_ERR(fb); | |
130 | goto fail; | |
131 | } | |
132 | ||
133 | mutex_lock(&dev->struct_mutex); | |
134 | ||
8f67da33 HL |
135 | /* |
136 | * NOTE: if we can be guaranteed to be able to map buffer | |
137 | * in panic (ie. lock-safe, etc) we could avoid pinning the | |
138 | * buffer now: | |
139 | */ | |
140 | ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr); | |
141 | if (ret) { | |
142 | dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret); | |
0d9509d2 | 143 | goto fail_unlock; |
8f67da33 | 144 | } |
c8afe684 RC |
145 | |
146 | fbi = framebuffer_alloc(0, dev->dev); | |
147 | if (!fbi) { | |
148 | dev_err(dev->dev, "failed to allocate fb info\n"); | |
149 | ret = -ENOMEM; | |
150 | goto fail_unlock; | |
151 | } | |
152 | ||
153 | DBG("fbi=%p, dev=%p", fbi, dev); | |
154 | ||
155 | fbdev->fb = fb; | |
156 | helper->fb = fb; | |
157 | helper->fbdev = fbi; | |
158 | ||
159 | fbi->par = helper; | |
160 | fbi->flags = FBINFO_DEFAULT; | |
161 | fbi->fbops = &msm_fb_ops; | |
162 | ||
163 | strcpy(fbi->fix.id, "msm"); | |
164 | ||
165 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); | |
166 | if (ret) { | |
167 | ret = -ENOMEM; | |
168 | goto fail_unlock; | |
169 | } | |
170 | ||
171 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); | |
172 | drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height); | |
173 | ||
174 | dev->mode_config.fb_base = paddr; | |
175 | ||
176 | fbi->screen_base = msm_gem_vaddr_locked(fbdev->bo); | |
177 | fbi->screen_size = fbdev->bo->size; | |
178 | fbi->fix.smem_start = paddr; | |
179 | fbi->fix.smem_len = fbdev->bo->size; | |
180 | ||
181 | DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres); | |
182 | DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height); | |
183 | ||
184 | mutex_unlock(&dev->struct_mutex); | |
185 | ||
186 | return 0; | |
187 | ||
188 | fail_unlock: | |
189 | mutex_unlock(&dev->struct_mutex); | |
190 | fail: | |
191 | ||
192 | if (ret) { | |
264f7d67 | 193 | framebuffer_release(fbi); |
c8afe684 RC |
194 | if (fb) { |
195 | drm_framebuffer_unregister_private(fb); | |
196 | drm_framebuffer_remove(fb); | |
197 | } | |
198 | } | |
199 | ||
200 | return ret; | |
201 | } | |
202 | ||
203 | static void msm_crtc_fb_gamma_set(struct drm_crtc *crtc, | |
204 | u16 red, u16 green, u16 blue, int regno) | |
205 | { | |
206 | DBG("fbdev: set gamma"); | |
207 | } | |
208 | ||
209 | static void msm_crtc_fb_gamma_get(struct drm_crtc *crtc, | |
210 | u16 *red, u16 *green, u16 *blue, int regno) | |
211 | { | |
212 | DBG("fbdev: get gamma"); | |
213 | } | |
214 | ||
3a493879 | 215 | static const struct drm_fb_helper_funcs msm_fb_helper_funcs = { |
c8afe684 RC |
216 | .gamma_set = msm_crtc_fb_gamma_set, |
217 | .gamma_get = msm_crtc_fb_gamma_get, | |
218 | .fb_probe = msm_fbdev_create, | |
219 | }; | |
220 | ||
221 | /* initialize fbdev helper */ | |
222 | struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev) | |
223 | { | |
224 | struct msm_drm_private *priv = dev->dev_private; | |
225 | struct msm_fbdev *fbdev = NULL; | |
226 | struct drm_fb_helper *helper; | |
8f67da33 | 227 | int ret; |
c8afe684 RC |
228 | |
229 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); | |
230 | if (!fbdev) | |
231 | goto fail; | |
232 | ||
233 | helper = &fbdev->base; | |
234 | ||
10a23102 | 235 | drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs); |
c8afe684 RC |
236 | |
237 | ret = drm_fb_helper_init(dev, helper, | |
238 | priv->num_crtcs, priv->num_connectors); | |
239 | if (ret) { | |
240 | dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret); | |
241 | goto fail; | |
242 | } | |
243 | ||
244 | drm_fb_helper_single_add_all_connectors(helper); | |
245 | ||
246 | /* disable all the possible outputs/crtcs before entering KMS mode */ | |
247 | drm_helper_disable_unused_functions(dev); | |
248 | ||
249 | drm_fb_helper_initial_config(helper, 32); | |
250 | ||
251 | priv->fbdev = helper; | |
252 | ||
253 | return helper; | |
254 | ||
255 | fail: | |
256 | kfree(fbdev); | |
257 | return NULL; | |
258 | } | |
259 | ||
260 | void msm_fbdev_free(struct drm_device *dev) | |
261 | { | |
262 | struct msm_drm_private *priv = dev->dev_private; | |
263 | struct drm_fb_helper *helper = priv->fbdev; | |
264 | struct msm_fbdev *fbdev; | |
265 | struct fb_info *fbi; | |
266 | ||
267 | DBG(); | |
268 | ||
269 | fbi = helper->fbdev; | |
270 | ||
271 | /* only cleanup framebuffer if it is present */ | |
272 | if (fbi) { | |
273 | unregister_framebuffer(fbi); | |
274 | framebuffer_release(fbi); | |
275 | } | |
276 | ||
277 | drm_fb_helper_fini(helper); | |
278 | ||
279 | fbdev = to_msm_fbdev(priv->fbdev); | |
280 | ||
281 | /* this will free the backing object */ | |
282 | if (fbdev->fb) { | |
283 | drm_framebuffer_unregister_private(fbdev->fb); | |
284 | drm_framebuffer_remove(fbdev->fb); | |
285 | } | |
286 | ||
287 | kfree(fbdev); | |
288 | ||
289 | priv->fbdev = NULL; | |
290 | } |