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1 | /* |
2 | * Copyright 2012 Red Hat | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General | |
5 | * Public License version 2. See the file COPYING in the main | |
6 | * directory of this archive for more details. | |
7 | * | |
8 | * Authors: Matthew Garrett | |
9 | * Dave Airlie | |
10 | */ | |
11 | #include <linux/module.h> | |
760285e7 DH |
12 | #include <drm/drmP.h> |
13 | #include <drm/drm_fb_helper.h> | |
f9aa76a8 DA |
14 | |
15 | #include <linux/fb.h> | |
16 | ||
17 | #include "cirrus_drv.h" | |
18 | ||
19 | static void cirrus_dirty_update(struct cirrus_fbdev *afbdev, | |
20 | int x, int y, int width, int height) | |
21 | { | |
22 | int i; | |
23 | struct drm_gem_object *obj; | |
24 | struct cirrus_bo *bo; | |
25 | int src_offset, dst_offset; | |
26 | int bpp = (afbdev->gfb.base.bits_per_pixel + 7)/8; | |
27 | int ret; | |
28 | bool unmap = false; | |
29 | ||
30 | obj = afbdev->gfb.obj; | |
31 | bo = gem_to_cirrus_bo(obj); | |
32 | ||
33 | ret = cirrus_bo_reserve(bo, true); | |
34 | if (ret) { | |
35 | DRM_ERROR("failed to reserve fb bo\n"); | |
36 | return; | |
37 | } | |
38 | ||
39 | if (!bo->kmap.virtual) { | |
40 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); | |
41 | if (ret) { | |
42 | DRM_ERROR("failed to kmap fb updates\n"); | |
43 | cirrus_bo_unreserve(bo); | |
44 | return; | |
45 | } | |
46 | unmap = true; | |
47 | } | |
48 | for (i = y; i < y + height; i++) { | |
49 | /* assume equal stride for now */ | |
50 | src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp); | |
51 | memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp); | |
52 | ||
53 | } | |
54 | if (unmap) | |
55 | ttm_bo_kunmap(&bo->kmap); | |
56 | ||
57 | cirrus_bo_unreserve(bo); | |
58 | } | |
59 | ||
60 | static void cirrus_fillrect(struct fb_info *info, | |
61 | const struct fb_fillrect *rect) | |
62 | { | |
63 | struct cirrus_fbdev *afbdev = info->par; | |
64 | sys_fillrect(info, rect); | |
65 | cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width, | |
66 | rect->height); | |
67 | } | |
68 | ||
69 | static void cirrus_copyarea(struct fb_info *info, | |
70 | const struct fb_copyarea *area) | |
71 | { | |
72 | struct cirrus_fbdev *afbdev = info->par; | |
73 | sys_copyarea(info, area); | |
74 | cirrus_dirty_update(afbdev, area->dx, area->dy, area->width, | |
75 | area->height); | |
76 | } | |
77 | ||
78 | static void cirrus_imageblit(struct fb_info *info, | |
79 | const struct fb_image *image) | |
80 | { | |
81 | struct cirrus_fbdev *afbdev = info->par; | |
82 | sys_imageblit(info, image); | |
83 | cirrus_dirty_update(afbdev, image->dx, image->dy, image->width, | |
84 | image->height); | |
85 | } | |
86 | ||
87 | ||
88 | static struct fb_ops cirrusfb_ops = { | |
89 | .owner = THIS_MODULE, | |
90 | .fb_check_var = drm_fb_helper_check_var, | |
91 | .fb_set_par = drm_fb_helper_set_par, | |
92 | .fb_fillrect = cirrus_fillrect, | |
93 | .fb_copyarea = cirrus_copyarea, | |
94 | .fb_imageblit = cirrus_imageblit, | |
95 | .fb_pan_display = drm_fb_helper_pan_display, | |
96 | .fb_blank = drm_fb_helper_blank, | |
97 | .fb_setcmap = drm_fb_helper_setcmap, | |
98 | }; | |
99 | ||
100 | static int cirrusfb_create_object(struct cirrus_fbdev *afbdev, | |
101 | struct drm_mode_fb_cmd2 *mode_cmd, | |
102 | struct drm_gem_object **gobj_p) | |
103 | { | |
104 | struct drm_device *dev = afbdev->helper.dev; | |
105 | u32 bpp, depth; | |
106 | u32 size; | |
107 | struct drm_gem_object *gobj; | |
108 | ||
109 | int ret = 0; | |
110 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); | |
111 | ||
112 | if (bpp > 24) | |
113 | return -EINVAL; | |
114 | size = mode_cmd->pitches[0] * mode_cmd->height; | |
115 | ret = cirrus_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 cirrusfb_create(struct cirrus_fbdev *gfbdev, | |
124 | struct drm_fb_helper_surface_size *sizes) | |
125 | { | |
126 | struct drm_device *dev = gfbdev->helper.dev; | |
127 | struct cirrus_device *cdev = gfbdev->helper.dev->dev_private; | |
128 | struct fb_info *info; | |
129 | struct drm_framebuffer *fb; | |
130 | struct drm_mode_fb_cmd2 mode_cmd; | |
131 | struct device *device = &dev->pdev->dev; | |
132 | void *sysram; | |
133 | struct drm_gem_object *gobj = NULL; | |
134 | struct cirrus_bo *bo = NULL; | |
135 | int size, ret; | |
136 | ||
137 | mode_cmd.width = sizes->surface_width; | |
138 | mode_cmd.height = sizes->surface_height; | |
139 | mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); | |
140 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
141 | sizes->surface_depth); | |
142 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
143 | ||
144 | ret = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj); | |
145 | if (ret) { | |
146 | DRM_ERROR("failed to create fbcon backing object %d\n", ret); | |
147 | return ret; | |
148 | } | |
149 | ||
150 | bo = gem_to_cirrus_bo(gobj); | |
151 | ||
152 | sysram = vmalloc(size); | |
153 | if (!sysram) | |
154 | return -ENOMEM; | |
155 | ||
156 | info = framebuffer_alloc(0, device); | |
157 | if (info == NULL) | |
158 | return -ENOMEM; | |
159 | ||
160 | info->par = gfbdev; | |
161 | ||
162 | ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj); | |
163 | if (ret) | |
164 | return ret; | |
165 | ||
166 | gfbdev->sysram = sysram; | |
167 | gfbdev->size = size; | |
168 | ||
169 | fb = &gfbdev->gfb.base; | |
170 | if (!fb) { | |
171 | DRM_INFO("fb is NULL\n"); | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | /* setup helper */ | |
176 | gfbdev->helper.fb = fb; | |
177 | gfbdev->helper.fbdev = info; | |
178 | ||
179 | strcpy(info->fix.id, "cirrusdrmfb"); | |
180 | ||
181 | ||
182 | info->flags = FBINFO_DEFAULT; | |
183 | info->fbops = &cirrusfb_ops; | |
184 | ||
185 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); | |
186 | drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width, | |
187 | sizes->fb_height); | |
188 | ||
189 | /* setup aperture base/size for vesafb takeover */ | |
190 | info->apertures = alloc_apertures(1); | |
191 | if (!info->apertures) { | |
192 | ret = -ENOMEM; | |
193 | goto out_iounmap; | |
194 | } | |
195 | info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base; | |
196 | info->apertures->ranges[0].size = cdev->mc.vram_size; | |
197 | ||
198 | info->screen_base = sysram; | |
199 | info->screen_size = size; | |
200 | ||
201 | info->fix.mmio_start = 0; | |
202 | info->fix.mmio_len = 0; | |
203 | ||
204 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
205 | if (ret) { | |
206 | DRM_ERROR("%s: can't allocate color map\n", info->fix.id); | |
207 | ret = -ENOMEM; | |
208 | goto out_iounmap; | |
209 | } | |
210 | ||
211 | DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); | |
212 | DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start); | |
213 | DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len); | |
214 | DRM_INFO("fb depth is %d\n", fb->depth); | |
215 | DRM_INFO(" pitch is %d\n", fb->pitches[0]); | |
216 | ||
217 | return 0; | |
218 | out_iounmap: | |
219 | return ret; | |
220 | } | |
221 | ||
222 | static int cirrus_fb_find_or_create_single(struct drm_fb_helper *helper, | |
223 | struct drm_fb_helper_surface_size | |
224 | *sizes) | |
225 | { | |
226 | struct cirrus_fbdev *gfbdev = (struct cirrus_fbdev *)helper; | |
227 | int new_fb = 0; | |
228 | int ret; | |
229 | ||
230 | if (!helper->fb) { | |
231 | ret = cirrusfb_create(gfbdev, sizes); | |
232 | if (ret) | |
233 | return ret; | |
234 | new_fb = 1; | |
235 | } | |
236 | return new_fb; | |
237 | } | |
238 | ||
239 | static int cirrus_fbdev_destroy(struct drm_device *dev, | |
240 | struct cirrus_fbdev *gfbdev) | |
241 | { | |
242 | struct fb_info *info; | |
243 | struct cirrus_framebuffer *gfb = &gfbdev->gfb; | |
244 | ||
245 | if (gfbdev->helper.fbdev) { | |
246 | info = gfbdev->helper.fbdev; | |
247 | ||
248 | unregister_framebuffer(info); | |
249 | if (info->cmap.len) | |
250 | fb_dealloc_cmap(&info->cmap); | |
251 | framebuffer_release(info); | |
252 | } | |
253 | ||
254 | if (gfb->obj) { | |
255 | drm_gem_object_unreference_unlocked(gfb->obj); | |
256 | gfb->obj = NULL; | |
257 | } | |
258 | ||
259 | vfree(gfbdev->sysram); | |
260 | drm_fb_helper_fini(&gfbdev->helper); | |
261 | drm_framebuffer_cleanup(&gfb->base); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static struct drm_fb_helper_funcs cirrus_fb_helper_funcs = { | |
267 | .gamma_set = cirrus_crtc_fb_gamma_set, | |
268 | .gamma_get = cirrus_crtc_fb_gamma_get, | |
269 | .fb_probe = cirrus_fb_find_or_create_single, | |
270 | }; | |
271 | ||
272 | int cirrus_fbdev_init(struct cirrus_device *cdev) | |
273 | { | |
274 | struct cirrus_fbdev *gfbdev; | |
275 | int ret; | |
276 | int bpp_sel = 24; | |
277 | ||
278 | /*bpp_sel = 8;*/ | |
279 | gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL); | |
280 | if (!gfbdev) | |
281 | return -ENOMEM; | |
282 | ||
283 | cdev->mode_info.gfbdev = gfbdev; | |
284 | gfbdev->helper.funcs = &cirrus_fb_helper_funcs; | |
285 | ||
286 | ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper, | |
287 | cdev->num_crtc, CIRRUSFB_CONN_LIMIT); | |
288 | if (ret) { | |
289 | kfree(gfbdev); | |
290 | return ret; | |
291 | } | |
292 | drm_fb_helper_single_add_all_connectors(&gfbdev->helper); | |
293 | drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel); | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | void cirrus_fbdev_fini(struct cirrus_device *cdev) | |
299 | { | |
300 | if (!cdev->mode_info.gfbdev) | |
301 | return; | |
302 | ||
303 | cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev); | |
304 | kfree(cdev->mode_info.gfbdev); | |
305 | cdev->mode_info.gfbdev = NULL; | |
306 | } |