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414c4531 DA |
1 | /* |
2 | * Copyright 2010 Matt Turner. | |
3 | * Copyright 2012 Red Hat | |
4 | * | |
5 | * This file is subject to the terms and conditions of the GNU General | |
6 | * Public License version 2. See the file COPYING in the main | |
7 | * directory of this archive for more details. | |
8 | * | |
9 | * Authors: Matthew Garrett | |
10 | * Matt Turner | |
11 | * Dave Airlie | |
12 | */ | |
13 | #include <linux/module.h> | |
760285e7 DH |
14 | #include <drm/drmP.h> |
15 | #include <drm/drm_fb_helper.h> | |
76a39dbf | 16 | #include <drm/drm_crtc_helper.h> |
414c4531 DA |
17 | |
18 | #include <linux/fb.h> | |
19 | ||
20 | #include "mgag200_drv.h" | |
21 | ||
22 | static void mga_dirty_update(struct mga_fbdev *mfbdev, | |
23 | int x, int y, int width, int height) | |
24 | { | |
25 | int i; | |
26 | struct drm_gem_object *obj; | |
27 | struct mgag200_bo *bo; | |
28 | int src_offset, dst_offset; | |
29 | int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8; | |
30 | int ret; | |
31 | bool unmap = false; | |
64171959 DA |
32 | bool store_for_later = false; |
33 | int x2, y2; | |
34 | unsigned long flags; | |
414c4531 DA |
35 | |
36 | obj = mfbdev->mfb.obj; | |
37 | bo = gem_to_mga_bo(obj); | |
38 | ||
64171959 DA |
39 | /* |
40 | * try and reserve the BO, if we fail with busy | |
41 | * then the BO is being moved and we should | |
42 | * store up the damage until later. | |
43 | */ | |
414c4531 DA |
44 | ret = mgag200_bo_reserve(bo, true); |
45 | if (ret) { | |
64171959 DA |
46 | if (ret != -EBUSY) |
47 | return; | |
48 | ||
49 | store_for_later = true; | |
50 | } | |
51 | ||
52 | x2 = x + width - 1; | |
53 | y2 = y + height - 1; | |
54 | spin_lock_irqsave(&mfbdev->dirty_lock, flags); | |
55 | ||
56 | if (mfbdev->y1 < y) | |
57 | y = mfbdev->y1; | |
58 | if (mfbdev->y2 > y2) | |
59 | y2 = mfbdev->y2; | |
60 | if (mfbdev->x1 < x) | |
61 | x = mfbdev->x1; | |
62 | if (mfbdev->x2 > x2) | |
63 | x2 = mfbdev->x2; | |
64 | ||
65 | if (store_for_later) { | |
66 | mfbdev->x1 = x; | |
67 | mfbdev->x2 = x2; | |
68 | mfbdev->y1 = y; | |
69 | mfbdev->y2 = y2; | |
70 | spin_unlock_irqrestore(&mfbdev->dirty_lock, flags); | |
414c4531 DA |
71 | return; |
72 | } | |
73 | ||
64171959 DA |
74 | mfbdev->x1 = mfbdev->y1 = INT_MAX; |
75 | mfbdev->x2 = mfbdev->y2 = 0; | |
76 | spin_unlock_irqrestore(&mfbdev->dirty_lock, flags); | |
77 | ||
414c4531 DA |
78 | if (!bo->kmap.virtual) { |
79 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); | |
80 | if (ret) { | |
81 | DRM_ERROR("failed to kmap fb updates\n"); | |
82 | mgag200_bo_unreserve(bo); | |
83 | return; | |
84 | } | |
85 | unmap = true; | |
86 | } | |
64171959 | 87 | for (i = y; i <= y2; i++) { |
414c4531 DA |
88 | /* assume equal stride for now */ |
89 | src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp); | |
64171959 | 90 | memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp); |
414c4531 DA |
91 | |
92 | } | |
93 | if (unmap) | |
94 | ttm_bo_kunmap(&bo->kmap); | |
95 | ||
96 | mgag200_bo_unreserve(bo); | |
97 | } | |
98 | ||
99 | static void mga_fillrect(struct fb_info *info, | |
100 | const struct fb_fillrect *rect) | |
101 | { | |
102 | struct mga_fbdev *mfbdev = info->par; | |
103 | sys_fillrect(info, rect); | |
104 | mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width, | |
105 | rect->height); | |
106 | } | |
107 | ||
108 | static void mga_copyarea(struct fb_info *info, | |
109 | const struct fb_copyarea *area) | |
110 | { | |
111 | struct mga_fbdev *mfbdev = info->par; | |
112 | sys_copyarea(info, area); | |
113 | mga_dirty_update(mfbdev, area->dx, area->dy, area->width, | |
114 | area->height); | |
115 | } | |
116 | ||
117 | static void mga_imageblit(struct fb_info *info, | |
118 | const struct fb_image *image) | |
119 | { | |
120 | struct mga_fbdev *mfbdev = info->par; | |
121 | sys_imageblit(info, image); | |
122 | mga_dirty_update(mfbdev, image->dx, image->dy, image->width, | |
123 | image->height); | |
124 | } | |
125 | ||
126 | ||
127 | static struct fb_ops mgag200fb_ops = { | |
128 | .owner = THIS_MODULE, | |
129 | .fb_check_var = drm_fb_helper_check_var, | |
130 | .fb_set_par = drm_fb_helper_set_par, | |
131 | .fb_fillrect = mga_fillrect, | |
132 | .fb_copyarea = mga_copyarea, | |
133 | .fb_imageblit = mga_imageblit, | |
134 | .fb_pan_display = drm_fb_helper_pan_display, | |
135 | .fb_blank = drm_fb_helper_blank, | |
136 | .fb_setcmap = drm_fb_helper_setcmap, | |
137 | }; | |
138 | ||
139 | static int mgag200fb_create_object(struct mga_fbdev *afbdev, | |
140 | struct drm_mode_fb_cmd2 *mode_cmd, | |
141 | struct drm_gem_object **gobj_p) | |
142 | { | |
143 | struct drm_device *dev = afbdev->helper.dev; | |
414c4531 DA |
144 | u32 size; |
145 | struct drm_gem_object *gobj; | |
414c4531 | 146 | int ret = 0; |
414c4531 DA |
147 | |
148 | size = mode_cmd->pitches[0] * mode_cmd->height; | |
149 | ret = mgag200_gem_create(dev, size, true, &gobj); | |
150 | if (ret) | |
151 | return ret; | |
152 | ||
153 | *gobj_p = gobj; | |
154 | return ret; | |
155 | } | |
156 | ||
cd5428a5 | 157 | static int mgag200fb_create(struct drm_fb_helper *helper, |
414c4531 DA |
158 | struct drm_fb_helper_surface_size *sizes) |
159 | { | |
cd5428a5 | 160 | struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper; |
414c4531 DA |
161 | struct drm_device *dev = mfbdev->helper.dev; |
162 | struct drm_mode_fb_cmd2 mode_cmd; | |
163 | struct mga_device *mdev = dev->dev_private; | |
164 | struct fb_info *info; | |
165 | struct drm_framebuffer *fb; | |
166 | struct drm_gem_object *gobj = NULL; | |
167 | struct device *device = &dev->pdev->dev; | |
168 | struct mgag200_bo *bo; | |
169 | int ret; | |
170 | void *sysram; | |
171 | int size; | |
172 | ||
173 | mode_cmd.width = sizes->surface_width; | |
174 | mode_cmd.height = sizes->surface_height; | |
175 | mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); | |
176 | ||
177 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
178 | sizes->surface_depth); | |
179 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
180 | ||
181 | ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj); | |
182 | if (ret) { | |
183 | DRM_ERROR("failed to create fbcon backing object %d\n", ret); | |
184 | return ret; | |
185 | } | |
186 | bo = gem_to_mga_bo(gobj); | |
187 | ||
188 | sysram = vmalloc(size); | |
189 | if (!sysram) | |
190 | return -ENOMEM; | |
191 | ||
192 | info = framebuffer_alloc(0, device); | |
193 | if (info == NULL) | |
194 | return -ENOMEM; | |
195 | ||
196 | info->par = mfbdev; | |
197 | ||
198 | ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj); | |
199 | if (ret) | |
200 | return ret; | |
201 | ||
202 | mfbdev->sysram = sysram; | |
203 | mfbdev->size = size; | |
204 | ||
205 | fb = &mfbdev->mfb.base; | |
206 | ||
207 | /* setup helper */ | |
208 | mfbdev->helper.fb = fb; | |
209 | mfbdev->helper.fbdev = info; | |
210 | ||
211 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
212 | if (ret) { | |
213 | DRM_ERROR("%s: can't allocate color map\n", info->fix.id); | |
214 | ret = -ENOMEM; | |
215 | goto out; | |
216 | } | |
217 | ||
218 | strcpy(info->fix.id, "mgadrmfb"); | |
219 | ||
220 | info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; | |
221 | info->fbops = &mgag200fb_ops; | |
222 | ||
223 | /* setup aperture base/size for vesafb takeover */ | |
224 | info->apertures = alloc_apertures(1); | |
225 | if (!info->apertures) { | |
226 | ret = -ENOMEM; | |
227 | goto out; | |
228 | } | |
229 | info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base; | |
230 | info->apertures->ranges[0].size = mdev->mc.vram_size; | |
231 | ||
232 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); | |
233 | drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width, | |
234 | sizes->fb_height); | |
235 | ||
236 | info->screen_base = sysram; | |
237 | info->screen_size = size; | |
238 | info->pixmap.flags = FB_PIXMAP_SYSTEM; | |
239 | ||
240 | DRM_DEBUG_KMS("allocated %dx%d\n", | |
241 | fb->width, fb->height); | |
242 | return 0; | |
243 | out: | |
244 | return ret; | |
245 | } | |
246 | ||
414c4531 DA |
247 | static int mga_fbdev_destroy(struct drm_device *dev, |
248 | struct mga_fbdev *mfbdev) | |
249 | { | |
250 | struct fb_info *info; | |
251 | struct mga_framebuffer *mfb = &mfbdev->mfb; | |
252 | ||
253 | if (mfbdev->helper.fbdev) { | |
254 | info = mfbdev->helper.fbdev; | |
255 | ||
256 | unregister_framebuffer(info); | |
257 | if (info->cmap.len) | |
258 | fb_dealloc_cmap(&info->cmap); | |
259 | framebuffer_release(info); | |
260 | } | |
261 | ||
262 | if (mfb->obj) { | |
263 | drm_gem_object_unreference_unlocked(mfb->obj); | |
264 | mfb->obj = NULL; | |
265 | } | |
266 | drm_fb_helper_fini(&mfbdev->helper); | |
267 | vfree(mfbdev->sysram); | |
36206361 | 268 | drm_framebuffer_unregister_private(&mfb->base); |
414c4531 DA |
269 | drm_framebuffer_cleanup(&mfb->base); |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static struct drm_fb_helper_funcs mga_fb_helper_funcs = { | |
275 | .gamma_set = mga_crtc_fb_gamma_set, | |
276 | .gamma_get = mga_crtc_fb_gamma_get, | |
cd5428a5 | 277 | .fb_probe = mgag200fb_create, |
414c4531 DA |
278 | }; |
279 | ||
280 | int mgag200_fbdev_init(struct mga_device *mdev) | |
281 | { | |
282 | struct mga_fbdev *mfbdev; | |
283 | int ret; | |
284 | ||
c2ed8844 | 285 | mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL); |
414c4531 DA |
286 | if (!mfbdev) |
287 | return -ENOMEM; | |
288 | ||
289 | mdev->mfbdev = mfbdev; | |
290 | mfbdev->helper.funcs = &mga_fb_helper_funcs; | |
64171959 | 291 | spin_lock_init(&mfbdev->dirty_lock); |
414c4531 DA |
292 | |
293 | ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper, | |
294 | mdev->num_crtc, MGAG200FB_CONN_LIMIT); | |
c2ed8844 | 295 | if (ret) |
414c4531 | 296 | return ret; |
c2ed8844 | 297 | |
414c4531 | 298 | drm_fb_helper_single_add_all_connectors(&mfbdev->helper); |
76a39dbf DV |
299 | |
300 | /* disable all the possible outputs/crtcs before entering KMS mode */ | |
301 | drm_helper_disable_unused_functions(mdev->dev); | |
302 | ||
414c4531 DA |
303 | drm_fb_helper_initial_config(&mfbdev->helper, 32); |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | void mgag200_fbdev_fini(struct mga_device *mdev) | |
309 | { | |
310 | if (!mdev->mfbdev) | |
311 | return; | |
312 | ||
313 | mga_fbdev_destroy(mdev->dev, mdev->mfbdev); | |
414c4531 | 314 | } |