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312fec14 DA |
1 | /* |
2 | * Copyright 2012 Red Hat Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the | |
6 | * "Software"), to deal in the Software without restriction, including | |
7 | * without limitation the rights to use, copy, modify, merge, publish, | |
8 | * distribute, sub license, and/or sell copies of the Software, and to | |
9 | * permit persons to whom the Software is furnished to do so, subject to | |
10 | * the following conditions: | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
13 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
14 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
15 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
16 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
17 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
18 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
19 | * | |
20 | * The above copyright notice and this permission notice (including the | |
21 | * next paragraph) shall be included in all copies or substantial portions | |
22 | * of the Software. | |
23 | * | |
24 | */ | |
25 | /* | |
26 | * Authors: Dave Airlie <airlied@redhat.com> | |
27 | */ | |
28 | #include <linux/module.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/tty.h> | |
34 | #include <linux/sysrq.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/fb.h> | |
37 | #include <linux/init.h> | |
38 | ||
39 | ||
760285e7 DH |
40 | #include <drm/drmP.h> |
41 | #include <drm/drm_crtc.h> | |
42 | #include <drm/drm_fb_helper.h> | |
76a39dbf | 43 | #include <drm/drm_crtc_helper.h> |
312fec14 DA |
44 | #include "ast_drv.h" |
45 | ||
46 | static void ast_dirty_update(struct ast_fbdev *afbdev, | |
47 | int x, int y, int width, int height) | |
48 | { | |
49 | int i; | |
50 | struct drm_gem_object *obj; | |
51 | struct ast_bo *bo; | |
52 | int src_offset, dst_offset; | |
53 | int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8; | |
8ade2b82 | 54 | int ret = -EBUSY; |
312fec14 | 55 | bool unmap = false; |
306373b6 DA |
56 | bool store_for_later = false; |
57 | int x2, y2; | |
58 | unsigned long flags; | |
312fec14 DA |
59 | |
60 | obj = afbdev->afb.obj; | |
61 | bo = gem_to_ast_bo(obj); | |
62 | ||
306373b6 DA |
63 | /* |
64 | * try and reserve the BO, if we fail with busy | |
65 | * then the BO is being moved and we should | |
66 | * store up the damage until later. | |
67 | */ | |
8b7ad1bb | 68 | if (drm_can_sleep()) |
8ade2b82 | 69 | ret = ast_bo_reserve(bo, true); |
312fec14 | 70 | if (ret) { |
306373b6 DA |
71 | if (ret != -EBUSY) |
72 | return; | |
73 | ||
74 | store_for_later = true; | |
75 | } | |
76 | ||
77 | x2 = x + width - 1; | |
78 | y2 = y + height - 1; | |
79 | spin_lock_irqsave(&afbdev->dirty_lock, flags); | |
80 | ||
81 | if (afbdev->y1 < y) | |
82 | y = afbdev->y1; | |
83 | if (afbdev->y2 > y2) | |
84 | y2 = afbdev->y2; | |
85 | if (afbdev->x1 < x) | |
86 | x = afbdev->x1; | |
87 | if (afbdev->x2 > x2) | |
88 | x2 = afbdev->x2; | |
89 | ||
90 | if (store_for_later) { | |
91 | afbdev->x1 = x; | |
92 | afbdev->x2 = x2; | |
93 | afbdev->y1 = y; | |
94 | afbdev->y2 = y2; | |
95 | spin_unlock_irqrestore(&afbdev->dirty_lock, flags); | |
312fec14 DA |
96 | return; |
97 | } | |
98 | ||
306373b6 DA |
99 | afbdev->x1 = afbdev->y1 = INT_MAX; |
100 | afbdev->x2 = afbdev->y2 = 0; | |
101 | spin_unlock_irqrestore(&afbdev->dirty_lock, flags); | |
102 | ||
312fec14 DA |
103 | if (!bo->kmap.virtual) { |
104 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); | |
105 | if (ret) { | |
106 | DRM_ERROR("failed to kmap fb updates\n"); | |
107 | ast_bo_unreserve(bo); | |
108 | return; | |
109 | } | |
110 | unmap = true; | |
111 | } | |
306373b6 | 112 | for (i = y; i <= y2; i++) { |
312fec14 DA |
113 | /* assume equal stride for now */ |
114 | src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp); | |
306373b6 | 115 | memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp); |
312fec14 DA |
116 | |
117 | } | |
118 | if (unmap) | |
119 | ttm_bo_kunmap(&bo->kmap); | |
120 | ||
121 | ast_bo_unreserve(bo); | |
122 | } | |
123 | ||
124 | static void ast_fillrect(struct fb_info *info, | |
125 | const struct fb_fillrect *rect) | |
126 | { | |
127 | struct ast_fbdev *afbdev = info->par; | |
128 | sys_fillrect(info, rect); | |
129 | ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width, | |
130 | rect->height); | |
131 | } | |
132 | ||
133 | static void ast_copyarea(struct fb_info *info, | |
134 | const struct fb_copyarea *area) | |
135 | { | |
136 | struct ast_fbdev *afbdev = info->par; | |
137 | sys_copyarea(info, area); | |
138 | ast_dirty_update(afbdev, area->dx, area->dy, area->width, | |
139 | area->height); | |
140 | } | |
141 | ||
142 | static void ast_imageblit(struct fb_info *info, | |
143 | const struct fb_image *image) | |
144 | { | |
145 | struct ast_fbdev *afbdev = info->par; | |
146 | sys_imageblit(info, image); | |
147 | ast_dirty_update(afbdev, image->dx, image->dy, image->width, | |
148 | image->height); | |
149 | } | |
150 | ||
151 | static struct fb_ops astfb_ops = { | |
152 | .owner = THIS_MODULE, | |
153 | .fb_check_var = drm_fb_helper_check_var, | |
154 | .fb_set_par = drm_fb_helper_set_par, | |
155 | .fb_fillrect = ast_fillrect, | |
156 | .fb_copyarea = ast_copyarea, | |
157 | .fb_imageblit = ast_imageblit, | |
158 | .fb_pan_display = drm_fb_helper_pan_display, | |
159 | .fb_blank = drm_fb_helper_blank, | |
160 | .fb_setcmap = drm_fb_helper_setcmap, | |
161 | .fb_debug_enter = drm_fb_helper_debug_enter, | |
162 | .fb_debug_leave = drm_fb_helper_debug_leave, | |
163 | }; | |
164 | ||
165 | static int astfb_create_object(struct ast_fbdev *afbdev, | |
166 | struct drm_mode_fb_cmd2 *mode_cmd, | |
167 | struct drm_gem_object **gobj_p) | |
168 | { | |
169 | struct drm_device *dev = afbdev->helper.dev; | |
170 | u32 bpp, depth; | |
171 | u32 size; | |
172 | struct drm_gem_object *gobj; | |
173 | ||
174 | int ret = 0; | |
175 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); | |
176 | ||
177 | size = mode_cmd->pitches[0] * mode_cmd->height; | |
178 | ret = ast_gem_create(dev, size, true, &gobj); | |
179 | if (ret) | |
180 | return ret; | |
181 | ||
182 | *gobj_p = gobj; | |
183 | return ret; | |
184 | } | |
185 | ||
cd5428a5 | 186 | static int astfb_create(struct drm_fb_helper *helper, |
312fec14 DA |
187 | struct drm_fb_helper_surface_size *sizes) |
188 | { | |
0d634f6e FF |
189 | struct ast_fbdev *afbdev = |
190 | container_of(helper, struct ast_fbdev, helper); | |
312fec14 DA |
191 | struct drm_device *dev = afbdev->helper.dev; |
192 | struct drm_mode_fb_cmd2 mode_cmd; | |
193 | struct drm_framebuffer *fb; | |
194 | struct fb_info *info; | |
195 | int size, ret; | |
196 | struct device *device = &dev->pdev->dev; | |
197 | void *sysram; | |
198 | struct drm_gem_object *gobj = NULL; | |
199 | struct ast_bo *bo = NULL; | |
200 | mode_cmd.width = sizes->surface_width; | |
201 | mode_cmd.height = sizes->surface_height; | |
202 | mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8); | |
203 | ||
204 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
205 | sizes->surface_depth); | |
206 | ||
207 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
208 | ||
209 | ret = astfb_create_object(afbdev, &mode_cmd, &gobj); | |
210 | if (ret) { | |
211 | DRM_ERROR("failed to create fbcon backing object %d\n", ret); | |
212 | return ret; | |
213 | } | |
214 | bo = gem_to_ast_bo(gobj); | |
215 | ||
216 | sysram = vmalloc(size); | |
217 | if (!sysram) | |
218 | return -ENOMEM; | |
219 | ||
220 | info = framebuffer_alloc(0, device); | |
221 | if (!info) { | |
222 | ret = -ENOMEM; | |
223 | goto out; | |
224 | } | |
225 | info->par = afbdev; | |
226 | ||
227 | ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj); | |
228 | if (ret) | |
229 | goto out; | |
230 | ||
231 | afbdev->sysram = sysram; | |
232 | afbdev->size = size; | |
233 | ||
234 | fb = &afbdev->afb.base; | |
235 | afbdev->helper.fb = fb; | |
236 | afbdev->helper.fbdev = info; | |
237 | ||
238 | strcpy(info->fix.id, "astdrmfb"); | |
239 | ||
240 | info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; | |
241 | info->fbops = &astfb_ops; | |
242 | ||
243 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
244 | if (ret) { | |
245 | ret = -ENOMEM; | |
246 | goto out; | |
247 | } | |
248 | ||
249 | info->apertures = alloc_apertures(1); | |
250 | if (!info->apertures) { | |
251 | ret = -ENOMEM; | |
252 | goto out; | |
253 | } | |
254 | info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0); | |
255 | info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0); | |
256 | ||
257 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); | |
258 | drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height); | |
259 | ||
260 | info->screen_base = sysram; | |
261 | info->screen_size = size; | |
262 | ||
263 | info->pixmap.flags = FB_PIXMAP_SYSTEM; | |
264 | ||
265 | DRM_DEBUG_KMS("allocated %dx%d\n", | |
266 | fb->width, fb->height); | |
267 | ||
268 | return 0; | |
269 | out: | |
270 | return ret; | |
271 | } | |
272 | ||
273 | static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, | |
274 | u16 blue, int regno) | |
275 | { | |
276 | struct ast_crtc *ast_crtc = to_ast_crtc(crtc); | |
277 | ast_crtc->lut_r[regno] = red >> 8; | |
278 | ast_crtc->lut_g[regno] = green >> 8; | |
279 | ast_crtc->lut_b[regno] = blue >> 8; | |
280 | } | |
281 | ||
282 | static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, | |
283 | u16 *blue, int regno) | |
284 | { | |
285 | struct ast_crtc *ast_crtc = to_ast_crtc(crtc); | |
286 | *red = ast_crtc->lut_r[regno] << 8; | |
287 | *green = ast_crtc->lut_g[regno] << 8; | |
288 | *blue = ast_crtc->lut_b[regno] << 8; | |
289 | } | |
290 | ||
3a493879 | 291 | static const struct drm_fb_helper_funcs ast_fb_helper_funcs = { |
312fec14 DA |
292 | .gamma_set = ast_fb_gamma_set, |
293 | .gamma_get = ast_fb_gamma_get, | |
cd5428a5 | 294 | .fb_probe = astfb_create, |
312fec14 DA |
295 | }; |
296 | ||
297 | static void ast_fbdev_destroy(struct drm_device *dev, | |
298 | struct ast_fbdev *afbdev) | |
299 | { | |
300 | struct fb_info *info; | |
301 | struct ast_framebuffer *afb = &afbdev->afb; | |
302 | if (afbdev->helper.fbdev) { | |
303 | info = afbdev->helper.fbdev; | |
304 | unregister_framebuffer(info); | |
305 | if (info->cmap.len) | |
306 | fb_dealloc_cmap(&info->cmap); | |
307 | framebuffer_release(info); | |
308 | } | |
309 | ||
310 | if (afb->obj) { | |
311 | drm_gem_object_unreference_unlocked(afb->obj); | |
312 | afb->obj = NULL; | |
313 | } | |
314 | drm_fb_helper_fini(&afbdev->helper); | |
315 | ||
316 | vfree(afbdev->sysram); | |
36206361 | 317 | drm_framebuffer_unregister_private(&afb->base); |
312fec14 DA |
318 | drm_framebuffer_cleanup(&afb->base); |
319 | } | |
320 | ||
321 | int ast_fbdev_init(struct drm_device *dev) | |
322 | { | |
323 | struct ast_private *ast = dev->dev_private; | |
324 | struct ast_fbdev *afbdev; | |
325 | int ret; | |
326 | ||
327 | afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL); | |
328 | if (!afbdev) | |
329 | return -ENOMEM; | |
330 | ||
331 | ast->fbdev = afbdev; | |
306373b6 | 332 | spin_lock_init(&afbdev->dirty_lock); |
10a23102 TR |
333 | |
334 | drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs); | |
335 | ||
312fec14 DA |
336 | ret = drm_fb_helper_init(dev, &afbdev->helper, |
337 | 1, 1); | |
01934c2a TR |
338 | if (ret) |
339 | goto free; | |
312fec14 | 340 | |
01934c2a TR |
341 | ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper); |
342 | if (ret) | |
343 | goto fini; | |
76a39dbf DV |
344 | |
345 | /* disable all the possible outputs/crtcs before entering KMS mode */ | |
346 | drm_helper_disable_unused_functions(dev); | |
347 | ||
01934c2a TR |
348 | ret = drm_fb_helper_initial_config(&afbdev->helper, 32); |
349 | if (ret) | |
350 | goto fini; | |
351 | ||
312fec14 | 352 | return 0; |
01934c2a TR |
353 | |
354 | fini: | |
355 | drm_fb_helper_fini(&afbdev->helper); | |
356 | free: | |
357 | kfree(afbdev); | |
358 | return ret; | |
312fec14 DA |
359 | } |
360 | ||
361 | void ast_fbdev_fini(struct drm_device *dev) | |
362 | { | |
363 | struct ast_private *ast = dev->dev_private; | |
364 | ||
365 | if (!ast->fbdev) | |
366 | return; | |
367 | ||
368 | ast_fbdev_destroy(dev, ast->fbdev); | |
369 | kfree(ast->fbdev); | |
370 | ast->fbdev = NULL; | |
371 | } | |
372 | ||
373 | void ast_fbdev_set_suspend(struct drm_device *dev, int state) | |
374 | { | |
375 | struct ast_private *ast = dev->dev_private; | |
376 | ||
377 | if (!ast->fbdev) | |
378 | return; | |
379 | ||
380 | fb_set_suspend(ast->fbdev->helper.fbdev, state); | |
381 | } |