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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; | |
32 | ||
33 | obj = mfbdev->mfb.obj; | |
34 | bo = gem_to_mga_bo(obj); | |
35 | ||
36 | ret = mgag200_bo_reserve(bo, true); | |
37 | if (ret) { | |
38 | DRM_ERROR("failed to reserve fb bo\n"); | |
39 | return; | |
40 | } | |
41 | ||
42 | if (!bo->kmap.virtual) { | |
43 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); | |
44 | if (ret) { | |
45 | DRM_ERROR("failed to kmap fb updates\n"); | |
46 | mgag200_bo_unreserve(bo); | |
47 | return; | |
48 | } | |
49 | unmap = true; | |
50 | } | |
51 | for (i = y; i < y + height; i++) { | |
52 | /* assume equal stride for now */ | |
53 | src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp); | |
54 | memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp); | |
55 | ||
56 | } | |
57 | if (unmap) | |
58 | ttm_bo_kunmap(&bo->kmap); | |
59 | ||
60 | mgag200_bo_unreserve(bo); | |
61 | } | |
62 | ||
63 | static void mga_fillrect(struct fb_info *info, | |
64 | const struct fb_fillrect *rect) | |
65 | { | |
66 | struct mga_fbdev *mfbdev = info->par; | |
67 | sys_fillrect(info, rect); | |
68 | mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width, | |
69 | rect->height); | |
70 | } | |
71 | ||
72 | static void mga_copyarea(struct fb_info *info, | |
73 | const struct fb_copyarea *area) | |
74 | { | |
75 | struct mga_fbdev *mfbdev = info->par; | |
76 | sys_copyarea(info, area); | |
77 | mga_dirty_update(mfbdev, area->dx, area->dy, area->width, | |
78 | area->height); | |
79 | } | |
80 | ||
81 | static void mga_imageblit(struct fb_info *info, | |
82 | const struct fb_image *image) | |
83 | { | |
84 | struct mga_fbdev *mfbdev = info->par; | |
85 | sys_imageblit(info, image); | |
86 | mga_dirty_update(mfbdev, image->dx, image->dy, image->width, | |
87 | image->height); | |
88 | } | |
89 | ||
90 | ||
91 | static struct fb_ops mgag200fb_ops = { | |
92 | .owner = THIS_MODULE, | |
93 | .fb_check_var = drm_fb_helper_check_var, | |
94 | .fb_set_par = drm_fb_helper_set_par, | |
95 | .fb_fillrect = mga_fillrect, | |
96 | .fb_copyarea = mga_copyarea, | |
97 | .fb_imageblit = mga_imageblit, | |
98 | .fb_pan_display = drm_fb_helper_pan_display, | |
99 | .fb_blank = drm_fb_helper_blank, | |
100 | .fb_setcmap = drm_fb_helper_setcmap, | |
101 | }; | |
102 | ||
103 | static int mgag200fb_create_object(struct mga_fbdev *afbdev, | |
104 | struct drm_mode_fb_cmd2 *mode_cmd, | |
105 | struct drm_gem_object **gobj_p) | |
106 | { | |
107 | struct drm_device *dev = afbdev->helper.dev; | |
108 | u32 bpp, depth; | |
109 | u32 size; | |
110 | struct drm_gem_object *gobj; | |
111 | ||
112 | int ret = 0; | |
113 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); | |
114 | ||
115 | size = mode_cmd->pitches[0] * mode_cmd->height; | |
116 | ret = mgag200_gem_create(dev, size, true, &gobj); | |
117 | if (ret) | |
118 | return ret; | |
119 | ||
120 | *gobj_p = gobj; | |
121 | return ret; | |
122 | } | |
123 | ||
cd5428a5 | 124 | static int mgag200fb_create(struct drm_fb_helper *helper, |
414c4531 DA |
125 | struct drm_fb_helper_surface_size *sizes) |
126 | { | |
cd5428a5 | 127 | struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper; |
414c4531 DA |
128 | struct drm_device *dev = mfbdev->helper.dev; |
129 | struct drm_mode_fb_cmd2 mode_cmd; | |
130 | struct mga_device *mdev = dev->dev_private; | |
131 | struct fb_info *info; | |
132 | struct drm_framebuffer *fb; | |
133 | struct drm_gem_object *gobj = NULL; | |
134 | struct device *device = &dev->pdev->dev; | |
135 | struct mgag200_bo *bo; | |
136 | int ret; | |
137 | void *sysram; | |
138 | int size; | |
139 | ||
140 | mode_cmd.width = sizes->surface_width; | |
141 | mode_cmd.height = sizes->surface_height; | |
142 | mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); | |
143 | ||
144 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
145 | sizes->surface_depth); | |
146 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
147 | ||
148 | ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj); | |
149 | if (ret) { | |
150 | DRM_ERROR("failed to create fbcon backing object %d\n", ret); | |
151 | return ret; | |
152 | } | |
153 | bo = gem_to_mga_bo(gobj); | |
154 | ||
155 | sysram = vmalloc(size); | |
156 | if (!sysram) | |
157 | return -ENOMEM; | |
158 | ||
159 | info = framebuffer_alloc(0, device); | |
160 | if (info == NULL) | |
161 | return -ENOMEM; | |
162 | ||
163 | info->par = mfbdev; | |
164 | ||
165 | ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj); | |
166 | if (ret) | |
167 | return ret; | |
168 | ||
169 | mfbdev->sysram = sysram; | |
170 | mfbdev->size = size; | |
171 | ||
172 | fb = &mfbdev->mfb.base; | |
173 | ||
174 | /* setup helper */ | |
175 | mfbdev->helper.fb = fb; | |
176 | mfbdev->helper.fbdev = info; | |
177 | ||
178 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
179 | if (ret) { | |
180 | DRM_ERROR("%s: can't allocate color map\n", info->fix.id); | |
181 | ret = -ENOMEM; | |
182 | goto out; | |
183 | } | |
184 | ||
185 | strcpy(info->fix.id, "mgadrmfb"); | |
186 | ||
187 | info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; | |
188 | info->fbops = &mgag200fb_ops; | |
189 | ||
190 | /* setup aperture base/size for vesafb takeover */ | |
191 | info->apertures = alloc_apertures(1); | |
192 | if (!info->apertures) { | |
193 | ret = -ENOMEM; | |
194 | goto out; | |
195 | } | |
196 | info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base; | |
197 | info->apertures->ranges[0].size = mdev->mc.vram_size; | |
198 | ||
199 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); | |
200 | drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width, | |
201 | sizes->fb_height); | |
202 | ||
203 | info->screen_base = sysram; | |
204 | info->screen_size = size; | |
205 | info->pixmap.flags = FB_PIXMAP_SYSTEM; | |
206 | ||
207 | DRM_DEBUG_KMS("allocated %dx%d\n", | |
208 | fb->width, fb->height); | |
209 | return 0; | |
210 | out: | |
211 | return ret; | |
212 | } | |
213 | ||
414c4531 DA |
214 | static int mga_fbdev_destroy(struct drm_device *dev, |
215 | struct mga_fbdev *mfbdev) | |
216 | { | |
217 | struct fb_info *info; | |
218 | struct mga_framebuffer *mfb = &mfbdev->mfb; | |
219 | ||
220 | if (mfbdev->helper.fbdev) { | |
221 | info = mfbdev->helper.fbdev; | |
222 | ||
223 | unregister_framebuffer(info); | |
224 | if (info->cmap.len) | |
225 | fb_dealloc_cmap(&info->cmap); | |
226 | framebuffer_release(info); | |
227 | } | |
228 | ||
229 | if (mfb->obj) { | |
230 | drm_gem_object_unreference_unlocked(mfb->obj); | |
231 | mfb->obj = NULL; | |
232 | } | |
233 | drm_fb_helper_fini(&mfbdev->helper); | |
234 | vfree(mfbdev->sysram); | |
36206361 | 235 | drm_framebuffer_unregister_private(&mfb->base); |
414c4531 DA |
236 | drm_framebuffer_cleanup(&mfb->base); |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | static struct drm_fb_helper_funcs mga_fb_helper_funcs = { | |
242 | .gamma_set = mga_crtc_fb_gamma_set, | |
243 | .gamma_get = mga_crtc_fb_gamma_get, | |
cd5428a5 | 244 | .fb_probe = mgag200fb_create, |
414c4531 DA |
245 | }; |
246 | ||
247 | int mgag200_fbdev_init(struct mga_device *mdev) | |
248 | { | |
249 | struct mga_fbdev *mfbdev; | |
250 | int ret; | |
251 | ||
252 | mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL); | |
253 | if (!mfbdev) | |
254 | return -ENOMEM; | |
255 | ||
256 | mdev->mfbdev = mfbdev; | |
257 | mfbdev->helper.funcs = &mga_fb_helper_funcs; | |
258 | ||
259 | ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper, | |
260 | mdev->num_crtc, MGAG200FB_CONN_LIMIT); | |
261 | if (ret) { | |
262 | kfree(mfbdev); | |
263 | return ret; | |
264 | } | |
265 | drm_fb_helper_single_add_all_connectors(&mfbdev->helper); | |
76a39dbf DV |
266 | |
267 | /* disable all the possible outputs/crtcs before entering KMS mode */ | |
268 | drm_helper_disable_unused_functions(mdev->dev); | |
269 | ||
414c4531 DA |
270 | drm_fb_helper_initial_config(&mfbdev->helper, 32); |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | void mgag200_fbdev_fini(struct mga_device *mdev) | |
276 | { | |
277 | if (!mdev->mfbdev) | |
278 | return; | |
279 | ||
280 | mga_fbdev_destroy(mdev->dev, mdev->mfbdev); | |
281 | kfree(mdev->mfbdev); | |
282 | mdev->mfbdev = NULL; | |
283 | } |