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