Merge branch 'drm-next-4.14' of git://people.freedesktop.org/~agd5f/linux into drm...
[sfrench/cifs-2.6.git] / drivers / gpu / drm / radeon / radeon_fb.c
1 /*
2  * Copyright © 2007 David Airlie
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *     David Airlie
25  */
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/pm_runtime.h>
29
30 #include <drm/drmP.h>
31 #include <drm/drm_crtc.h>
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/radeon_drm.h>
34 #include "radeon.h"
35
36 #include <drm/drm_fb_helper.h>
37
38 #include <linux/vga_switcheroo.h>
39
40 /* object hierarchy -
41  * this contains a helper + a radeon fb
42  * the helper contains a pointer to radeon framebuffer baseclass.
43  */
44 struct radeon_fbdev {
45         struct drm_fb_helper helper;
46         struct radeon_framebuffer rfb;
47         struct radeon_device *rdev;
48 };
49
50 static int
51 radeonfb_open(struct fb_info *info, int user)
52 {
53         struct radeon_fbdev *rfbdev = info->par;
54         struct radeon_device *rdev = rfbdev->rdev;
55         int ret = pm_runtime_get_sync(rdev->ddev->dev);
56         if (ret < 0 && ret != -EACCES) {
57                 pm_runtime_mark_last_busy(rdev->ddev->dev);
58                 pm_runtime_put_autosuspend(rdev->ddev->dev);
59                 return ret;
60         }
61         return 0;
62 }
63
64 static int
65 radeonfb_release(struct fb_info *info, int user)
66 {
67         struct radeon_fbdev *rfbdev = info->par;
68         struct radeon_device *rdev = rfbdev->rdev;
69
70         pm_runtime_mark_last_busy(rdev->ddev->dev);
71         pm_runtime_put_autosuspend(rdev->ddev->dev);
72         return 0;
73 }
74
75 static struct fb_ops radeonfb_ops = {
76         .owner = THIS_MODULE,
77         DRM_FB_HELPER_DEFAULT_OPS,
78         .fb_open = radeonfb_open,
79         .fb_release = radeonfb_release,
80         .fb_fillrect = drm_fb_helper_cfb_fillrect,
81         .fb_copyarea = drm_fb_helper_cfb_copyarea,
82         .fb_imageblit = drm_fb_helper_cfb_imageblit,
83 };
84
85
86 int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
87 {
88         int aligned = width;
89         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
90         int pitch_mask = 0;
91
92         switch (cpp) {
93         case 1:
94                 pitch_mask = align_large ? 255 : 127;
95                 break;
96         case 2:
97                 pitch_mask = align_large ? 127 : 31;
98                 break;
99         case 3:
100         case 4:
101                 pitch_mask = align_large ? 63 : 15;
102                 break;
103         }
104
105         aligned += pitch_mask;
106         aligned &= ~pitch_mask;
107         return aligned * cpp;
108 }
109
110 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
111 {
112         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
113         int ret;
114
115         ret = radeon_bo_reserve(rbo, false);
116         if (likely(ret == 0)) {
117                 radeon_bo_kunmap(rbo);
118                 radeon_bo_unpin(rbo);
119                 radeon_bo_unreserve(rbo);
120         }
121         drm_gem_object_unreference_unlocked(gobj);
122 }
123
124 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
125                                          struct drm_mode_fb_cmd2 *mode_cmd,
126                                          struct drm_gem_object **gobj_p)
127 {
128         struct radeon_device *rdev = rfbdev->rdev;
129         struct drm_gem_object *gobj = NULL;
130         struct radeon_bo *rbo = NULL;
131         bool fb_tiled = false; /* useful for testing */
132         u32 tiling_flags = 0;
133         int ret;
134         int aligned_size, size;
135         int height = mode_cmd->height;
136         u32 cpp;
137
138         cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
139
140         /* need to align pitch with crtc limits */
141         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
142                                                   fb_tiled);
143
144         if (rdev->family >= CHIP_R600)
145                 height = ALIGN(mode_cmd->height, 8);
146         size = mode_cmd->pitches[0] * height;
147         aligned_size = ALIGN(size, PAGE_SIZE);
148         ret = radeon_gem_object_create(rdev, aligned_size, 0,
149                                        RADEON_GEM_DOMAIN_VRAM,
150                                        0, true, &gobj);
151         if (ret) {
152                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
153                 return -ENOMEM;
154         }
155         rbo = gem_to_radeon_bo(gobj);
156
157         if (fb_tiled)
158                 tiling_flags = RADEON_TILING_MACRO;
159
160 #ifdef __BIG_ENDIAN
161         switch (cpp) {
162         case 4:
163                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
164                 break;
165         case 2:
166                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
167         default:
168                 break;
169         }
170 #endif
171
172         if (tiling_flags) {
173                 ret = radeon_bo_set_tiling_flags(rbo,
174                                                  tiling_flags | RADEON_TILING_SURFACE,
175                                                  mode_cmd->pitches[0]);
176                 if (ret)
177                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
178         }
179
180
181         ret = radeon_bo_reserve(rbo, false);
182         if (unlikely(ret != 0))
183                 goto out_unref;
184         /* Only 27 bit offset for legacy CRTC */
185         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
186                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
187                                        NULL);
188         if (ret) {
189                 radeon_bo_unreserve(rbo);
190                 goto out_unref;
191         }
192         if (fb_tiled)
193                 radeon_bo_check_tiling(rbo, 0, 0);
194         ret = radeon_bo_kmap(rbo, NULL);
195         radeon_bo_unreserve(rbo);
196         if (ret) {
197                 goto out_unref;
198         }
199
200         *gobj_p = gobj;
201         return 0;
202 out_unref:
203         radeonfb_destroy_pinned_object(gobj);
204         *gobj_p = NULL;
205         return ret;
206 }
207
208 static int radeonfb_create(struct drm_fb_helper *helper,
209                            struct drm_fb_helper_surface_size *sizes)
210 {
211         struct radeon_fbdev *rfbdev =
212                 container_of(helper, struct radeon_fbdev, helper);
213         struct radeon_device *rdev = rfbdev->rdev;
214         struct fb_info *info;
215         struct drm_framebuffer *fb = NULL;
216         struct drm_mode_fb_cmd2 mode_cmd;
217         struct drm_gem_object *gobj = NULL;
218         struct radeon_bo *rbo = NULL;
219         int ret;
220         unsigned long tmp;
221
222         mode_cmd.width = sizes->surface_width;
223         mode_cmd.height = sizes->surface_height;
224
225         /* avivo can't scanout real 24bpp */
226         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
227                 sizes->surface_bpp = 32;
228
229         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
230                                                           sizes->surface_depth);
231
232         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
233         if (ret) {
234                 DRM_ERROR("failed to create fbcon object %d\n", ret);
235                 return ret;
236         }
237
238         rbo = gem_to_radeon_bo(gobj);
239
240         /* okay we have an object now allocate the framebuffer */
241         info = drm_fb_helper_alloc_fbi(helper);
242         if (IS_ERR(info)) {
243                 ret = PTR_ERR(info);
244                 goto out;
245         }
246
247         info->par = rfbdev;
248         info->skip_vt_switch = true;
249
250         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
251         if (ret) {
252                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
253                 goto out;
254         }
255
256         fb = &rfbdev->rfb.base;
257
258         /* setup helper */
259         rfbdev->helper.fb = fb;
260
261         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
262
263         strcpy(info->fix.id, "radeondrmfb");
264
265         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
266
267         info->fbops = &radeonfb_ops;
268
269         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
270         info->fix.smem_start = rdev->mc.aper_base + tmp;
271         info->fix.smem_len = radeon_bo_size(rbo);
272         info->screen_base = rbo->kptr;
273         info->screen_size = radeon_bo_size(rbo);
274
275         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
276
277         /* setup aperture base/size for vesafb takeover */
278         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
279         info->apertures->ranges[0].size = rdev->mc.aper_size;
280
281         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
282
283         if (info->screen_base == NULL) {
284                 ret = -ENOSPC;
285                 goto out;
286         }
287
288         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
289         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
290         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
291         DRM_INFO("fb depth is %d\n", fb->format->depth);
292         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
293
294         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
295         return 0;
296
297 out:
298         if (rbo) {
299
300         }
301         if (fb && ret) {
302                 drm_gem_object_unreference_unlocked(gobj);
303                 drm_framebuffer_unregister_private(fb);
304                 drm_framebuffer_cleanup(fb);
305                 kfree(fb);
306         }
307         return ret;
308 }
309
310 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
311 {
312         if (rdev->mode_info.rfbdev)
313                 drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
314 }
315
316 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
317 {
318         struct radeon_framebuffer *rfb = &rfbdev->rfb;
319
320         drm_fb_helper_unregister_fbi(&rfbdev->helper);
321
322         if (rfb->obj) {
323                 radeonfb_destroy_pinned_object(rfb->obj);
324                 rfb->obj = NULL;
325         }
326         drm_fb_helper_fini(&rfbdev->helper);
327         drm_framebuffer_unregister_private(&rfb->base);
328         drm_framebuffer_cleanup(&rfb->base);
329
330         return 0;
331 }
332
333 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
334         .gamma_set = radeon_crtc_fb_gamma_set,
335         .gamma_get = radeon_crtc_fb_gamma_get,
336         .fb_probe = radeonfb_create,
337 };
338
339 int radeon_fbdev_init(struct radeon_device *rdev)
340 {
341         struct radeon_fbdev *rfbdev;
342         int bpp_sel = 32;
343         int ret;
344
345         /* don't enable fbdev if no connectors */
346         if (list_empty(&rdev->ddev->mode_config.connector_list))
347                 return 0;
348
349         /* select 8 bpp console on 8MB cards, or 16 bpp on RN50 or 32MB */
350         if (rdev->mc.real_vram_size <= (8*1024*1024))
351                 bpp_sel = 8;
352         else if (ASIC_IS_RN50(rdev) ||
353                  rdev->mc.real_vram_size <= (32*1024*1024))
354                 bpp_sel = 16;
355
356         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
357         if (!rfbdev)
358                 return -ENOMEM;
359
360         rfbdev->rdev = rdev;
361         rdev->mode_info.rfbdev = rfbdev;
362
363         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
364                               &radeon_fb_helper_funcs);
365
366         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
367                                  RADEONFB_CONN_LIMIT);
368         if (ret)
369                 goto free;
370
371         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
372         if (ret)
373                 goto fini;
374
375         /* disable all the possible outputs/crtcs before entering KMS mode */
376         drm_helper_disable_unused_functions(rdev->ddev);
377
378         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
379         if (ret)
380                 goto fini;
381
382         return 0;
383
384 fini:
385         drm_fb_helper_fini(&rfbdev->helper);
386 free:
387         kfree(rfbdev);
388         return ret;
389 }
390
391 void radeon_fbdev_fini(struct radeon_device *rdev)
392 {
393         if (!rdev->mode_info.rfbdev)
394                 return;
395
396         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
397         kfree(rdev->mode_info.rfbdev);
398         rdev->mode_info.rfbdev = NULL;
399 }
400
401 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
402 {
403         if (rdev->mode_info.rfbdev)
404                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
405 }
406
407 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
408 {
409         if (!rdev->mode_info.rfbdev)
410                 return false;
411
412         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
413                 return true;
414         return false;
415 }
416
417 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
418 {
419         if (rdev->mode_info.rfbdev)
420                 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
421 }
422
423 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
424 {
425         if (rdev->mode_info.rfbdev)
426                 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
427 }
428
429 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
430 {
431         struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
432         struct drm_fb_helper *fb_helper;
433         int ret;
434
435         if (!rfbdev)
436                 return;
437
438         fb_helper = &rfbdev->helper;
439
440         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
441         if (ret)
442                 DRM_DEBUG("failed to restore crtc mode\n");
443 }