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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 | */ | |
778014f0 AT |
46 | .fb_read = drm_fb_helper_sys_read, |
47 | .fb_write = drm_fb_helper_sys_write, | |
48 | .fb_fillrect = drm_fb_helper_sys_fillrect, | |
49 | .fb_copyarea = drm_fb_helper_sys_copyarea, | |
50 | .fb_imageblit = drm_fb_helper_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 | ||
8f67da33 | 71 | ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma); |
8f67da33 HL |
72 | if (ret) { |
73 | pr_err("%s:drm_gem_mmap_obj fail\n", __func__); | |
74 | return ret; | |
75 | } | |
76 | ||
77 | return msm_gem_mmap_obj(drm_obj, vma); | |
78 | } | |
79 | ||
c8afe684 RC |
80 | static int msm_fbdev_create(struct drm_fb_helper *helper, |
81 | struct drm_fb_helper_surface_size *sizes) | |
82 | { | |
83 | struct msm_fbdev *fbdev = to_msm_fbdev(helper); | |
84 | struct drm_device *dev = helper->dev; | |
85 | struct drm_framebuffer *fb = NULL; | |
86 | struct fb_info *fbi = NULL; | |
87 | struct drm_mode_fb_cmd2 mode_cmd = {0}; | |
2557e2d7 | 88 | uint32_t paddr; |
c8afe684 RC |
89 | int ret, size; |
90 | ||
c8afe684 RC |
91 | DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width, |
92 | sizes->surface_height, sizes->surface_bpp, | |
93 | sizes->fb_width, sizes->fb_height); | |
94 | ||
95 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
96 | sizes->surface_depth); | |
97 | ||
98 | mode_cmd.width = sizes->surface_width; | |
99 | mode_cmd.height = sizes->surface_height; | |
100 | ||
101 | mode_cmd.pitches[0] = align_pitch( | |
102 | mode_cmd.width, sizes->surface_bpp); | |
103 | ||
104 | /* allocate backing bo */ | |
105 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
106 | DBG("allocating %d bytes for fb %d", size, dev->primary->index); | |
107 | mutex_lock(&dev->struct_mutex); | |
072f1f91 RC |
108 | fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | |
109 | MSM_BO_WC | MSM_BO_STOLEN); | |
c8afe684 RC |
110 | mutex_unlock(&dev->struct_mutex); |
111 | if (IS_ERR(fbdev->bo)) { | |
112 | ret = PTR_ERR(fbdev->bo); | |
113 | fbdev->bo = NULL; | |
114 | dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret); | |
115 | goto fail; | |
116 | } | |
117 | ||
118 | fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo); | |
119 | if (IS_ERR(fb)) { | |
120 | dev_err(dev->dev, "failed to allocate fb\n"); | |
121 | /* note: if fb creation failed, we can't rely on fb destroy | |
122 | * to unref the bo: | |
123 | */ | |
124 | drm_gem_object_unreference(fbdev->bo); | |
125 | ret = PTR_ERR(fb); | |
126 | goto fail; | |
127 | } | |
128 | ||
129 | mutex_lock(&dev->struct_mutex); | |
130 | ||
8f67da33 HL |
131 | /* |
132 | * NOTE: if we can be guaranteed to be able to map buffer | |
133 | * in panic (ie. lock-safe, etc) we could avoid pinning the | |
134 | * buffer now: | |
135 | */ | |
136 | ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr); | |
137 | if (ret) { | |
138 | dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret); | |
0d9509d2 | 139 | goto fail_unlock; |
8f67da33 | 140 | } |
c8afe684 | 141 | |
778014f0 AT |
142 | fbi = drm_fb_helper_alloc_fbi(helper); |
143 | if (IS_ERR(fbi)) { | |
c8afe684 | 144 | dev_err(dev->dev, "failed to allocate fb info\n"); |
778014f0 | 145 | ret = PTR_ERR(fbi); |
c8afe684 RC |
146 | goto fail_unlock; |
147 | } | |
148 | ||
149 | DBG("fbi=%p, dev=%p", fbi, dev); | |
150 | ||
151 | fbdev->fb = fb; | |
152 | helper->fb = fb; | |
c8afe684 RC |
153 | |
154 | fbi->par = helper; | |
155 | fbi->flags = FBINFO_DEFAULT; | |
156 | fbi->fbops = &msm_fb_ops; | |
157 | ||
158 | strcpy(fbi->fix.id, "msm"); | |
159 | ||
c8afe684 RC |
160 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); |
161 | drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height); | |
162 | ||
163 | dev->mode_config.fb_base = paddr; | |
164 | ||
165 | fbi->screen_base = msm_gem_vaddr_locked(fbdev->bo); | |
166 | fbi->screen_size = fbdev->bo->size; | |
167 | fbi->fix.smem_start = paddr; | |
168 | fbi->fix.smem_len = fbdev->bo->size; | |
169 | ||
170 | DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres); | |
171 | DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height); | |
172 | ||
173 | mutex_unlock(&dev->struct_mutex); | |
174 | ||
175 | return 0; | |
176 | ||
177 | fail_unlock: | |
178 | mutex_unlock(&dev->struct_mutex); | |
179 | fail: | |
180 | ||
181 | if (ret) { | |
c8afe684 RC |
182 | if (fb) { |
183 | drm_framebuffer_unregister_private(fb); | |
184 | drm_framebuffer_remove(fb); | |
185 | } | |
186 | } | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
191 | static void msm_crtc_fb_gamma_set(struct drm_crtc *crtc, | |
192 | u16 red, u16 green, u16 blue, int regno) | |
193 | { | |
194 | DBG("fbdev: set gamma"); | |
195 | } | |
196 | ||
197 | static void msm_crtc_fb_gamma_get(struct drm_crtc *crtc, | |
198 | u16 *red, u16 *green, u16 *blue, int regno) | |
199 | { | |
200 | DBG("fbdev: get gamma"); | |
201 | } | |
202 | ||
3a493879 | 203 | static const struct drm_fb_helper_funcs msm_fb_helper_funcs = { |
c8afe684 RC |
204 | .gamma_set = msm_crtc_fb_gamma_set, |
205 | .gamma_get = msm_crtc_fb_gamma_get, | |
206 | .fb_probe = msm_fbdev_create, | |
207 | }; | |
208 | ||
209 | /* initialize fbdev helper */ | |
210 | struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev) | |
211 | { | |
212 | struct msm_drm_private *priv = dev->dev_private; | |
213 | struct msm_fbdev *fbdev = NULL; | |
214 | struct drm_fb_helper *helper; | |
8f67da33 | 215 | int ret; |
c8afe684 RC |
216 | |
217 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); | |
218 | if (!fbdev) | |
219 | goto fail; | |
220 | ||
221 | helper = &fbdev->base; | |
222 | ||
10a23102 | 223 | drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs); |
c8afe684 RC |
224 | |
225 | ret = drm_fb_helper_init(dev, helper, | |
226 | priv->num_crtcs, priv->num_connectors); | |
227 | if (ret) { | |
228 | dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret); | |
229 | goto fail; | |
230 | } | |
231 | ||
01934c2a TR |
232 | ret = drm_fb_helper_single_add_all_connectors(helper); |
233 | if (ret) | |
234 | goto fini; | |
c8afe684 | 235 | |
01934c2a TR |
236 | ret = drm_fb_helper_initial_config(helper, 32); |
237 | if (ret) | |
238 | goto fini; | |
c8afe684 RC |
239 | |
240 | priv->fbdev = helper; | |
241 | ||
242 | return helper; | |
243 | ||
01934c2a TR |
244 | fini: |
245 | drm_fb_helper_fini(helper); | |
c8afe684 RC |
246 | fail: |
247 | kfree(fbdev); | |
248 | return NULL; | |
249 | } | |
250 | ||
251 | void msm_fbdev_free(struct drm_device *dev) | |
252 | { | |
253 | struct msm_drm_private *priv = dev->dev_private; | |
254 | struct drm_fb_helper *helper = priv->fbdev; | |
255 | struct msm_fbdev *fbdev; | |
c8afe684 RC |
256 | |
257 | DBG(); | |
258 | ||
778014f0 AT |
259 | drm_fb_helper_unregister_fbi(helper); |
260 | drm_fb_helper_release_fbi(helper); | |
c8afe684 RC |
261 | |
262 | drm_fb_helper_fini(helper); | |
263 | ||
264 | fbdev = to_msm_fbdev(priv->fbdev); | |
265 | ||
266 | /* this will free the backing object */ | |
267 | if (fbdev->fb) { | |
268 | drm_framebuffer_unregister_private(fbdev->fb); | |
269 | drm_framebuffer_remove(fbdev->fb); | |
270 | } | |
271 | ||
272 | kfree(fbdev); | |
273 | ||
274 | priv->fbdev = NULL; | |
275 | } |