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1/*
2 * Copyright (C) 2012-2013 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
4 *
5 * Based on the KMS/FB CMA helpers
6 * Copyright (C) 2012 Analog Device Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/console.h>
14
15#include "drm.h"
16#include "gem.h"
17
18static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
19{
20 return container_of(fb, struct tegra_fb, base);
21}
22
23#ifdef CONFIG_DRM_FBDEV_EMULATION
24static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
25{
26 return container_of(helper, struct tegra_fbdev, base);
27}
28#endif
29
30struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
31 unsigned int index)
32{
33 struct tegra_fb *fb = to_tegra_fb(framebuffer);
34
35 if (index >= framebuffer->format->num_planes)
36 return NULL;
37
38 return fb->planes[index];
39}
40
41bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
42{
43 struct tegra_fb *fb = to_tegra_fb(framebuffer);
44
45 if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
46 return true;
47
48 return false;
49}
50
51int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
52 struct tegra_bo_tiling *tiling)
53{
54 struct tegra_fb *fb = to_tegra_fb(framebuffer);
55 uint64_t modifier = fb->base.modifier;
56
57 switch (modifier) {
58 case DRM_FORMAT_MOD_LINEAR:
59 tiling->mode = TEGRA_BO_TILING_MODE_PITCH;
60 tiling->value = 0;
61 break;
62
63 case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED:
64 tiling->mode = TEGRA_BO_TILING_MODE_TILED;
65 tiling->value = 0;
66 break;
67
68 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0):
69 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
70 tiling->value = 0;
71 break;
72
73 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1):
74 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
75 tiling->value = 1;
76 break;
77
78 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2):
79 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
80 tiling->value = 2;
81 break;
82
83 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3):
84 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
85 tiling->value = 3;
86 break;
87
88 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4):
89 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
90 tiling->value = 4;
91 break;
92
93 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5):
94 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
95 tiling->value = 5;
96 break;
97
98 default:
99 return -EINVAL;
100 }
101
102 return 0;
103}
104
105static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
106{
107 struct tegra_fb *fb = to_tegra_fb(framebuffer);
108 unsigned int i;
109
110 for (i = 0; i < fb->num_planes; i++) {
111 struct tegra_bo *bo = fb->planes[i];
112
113 if (bo) {
114 if (bo->pages)
115 vunmap(bo->vaddr);
116
117 drm_gem_object_put_unlocked(&bo->gem);
118 }
119 }
120
121 drm_framebuffer_cleanup(framebuffer);
122 kfree(fb->planes);
123 kfree(fb);
124}
125
126static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
127 struct drm_file *file, unsigned int *handle)
128{
129 struct tegra_fb *fb = to_tegra_fb(framebuffer);
130
131 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
132}
133
134static const struct drm_framebuffer_funcs tegra_fb_funcs = {
135 .destroy = tegra_fb_destroy,
136 .create_handle = tegra_fb_create_handle,
137};
138
139static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
140 const struct drm_mode_fb_cmd2 *mode_cmd,
141 struct tegra_bo **planes,
142 unsigned int num_planes)
143{
144 struct tegra_fb *fb;
145 unsigned int i;
146 int err;
147
148 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
149 if (!fb)
150 return ERR_PTR(-ENOMEM);
151
152 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
153 if (!fb->planes) {
154 kfree(fb);
155 return ERR_PTR(-ENOMEM);
156 }
157
158 fb->num_planes = num_planes;
159
160 drm_helper_mode_fill_fb_struct(drm, &fb->base, mode_cmd);
161
162 for (i = 0; i < fb->num_planes; i++)
163 fb->planes[i] = planes[i];
164
165 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
166 if (err < 0) {
167 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
168 err);
169 kfree(fb->planes);
170 kfree(fb);
171 return ERR_PTR(err);
172 }
173
174 return fb;
175}
176
177struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
178 struct drm_file *file,
179 const struct drm_mode_fb_cmd2 *cmd)
180{
181 unsigned int hsub, vsub, i;
182 struct tegra_bo *planes[4];
183 struct drm_gem_object *gem;
184 struct tegra_fb *fb;
185 int err;
186
187 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
188 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
189
190 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
191 unsigned int width = cmd->width / (i ? hsub : 1);
192 unsigned int height = cmd->height / (i ? vsub : 1);
193 unsigned int size, bpp;
194
195 gem = drm_gem_object_lookup(file, cmd->handles[i]);
196 if (!gem) {
197 err = -ENXIO;
198 goto unreference;
199 }
200
201 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
202
203 size = (height - 1) * cmd->pitches[i] +
204 width * bpp + cmd->offsets[i];
205
206 if (gem->size < size) {
207 err = -EINVAL;
208 goto unreference;
209 }
210
211 planes[i] = to_tegra_bo(gem);
212 }
213
214 fb = tegra_fb_alloc(drm, cmd, planes, i);
215 if (IS_ERR(fb)) {
216 err = PTR_ERR(fb);
217 goto unreference;
218 }
219
220 return &fb->base;
221
222unreference:
223 while (i--)
224 drm_gem_object_put_unlocked(&planes[i]->gem);
225
226 return ERR_PTR(err);
227}
228
229#ifdef CONFIG_DRM_FBDEV_EMULATION
230static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
231{
232 struct drm_fb_helper *helper = info->par;
233 struct tegra_bo *bo;
234 int err;
235
236 bo = tegra_fb_get_plane(helper->fb, 0);
237
238 err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma);
239 if (err < 0)
240 return err;
241
242 return __tegra_gem_mmap(&bo->gem, vma);
243}
244
245static struct fb_ops tegra_fb_ops = {
246 .owner = THIS_MODULE,
247 DRM_FB_HELPER_DEFAULT_OPS,
248 .fb_fillrect = drm_fb_helper_sys_fillrect,
249 .fb_copyarea = drm_fb_helper_sys_copyarea,
250 .fb_imageblit = drm_fb_helper_sys_imageblit,
251 .fb_mmap = tegra_fb_mmap,
252};
253
254static int tegra_fbdev_probe(struct drm_fb_helper *helper,
255 struct drm_fb_helper_surface_size *sizes)
256{
257 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
258 struct tegra_drm *tegra = helper->dev->dev_private;
259 struct drm_device *drm = helper->dev;
260 struct drm_mode_fb_cmd2 cmd = { 0 };
261 unsigned int bytes_per_pixel;
262 struct drm_framebuffer *fb;
263 unsigned long offset;
264 struct fb_info *info;
265 struct tegra_bo *bo;
266 size_t size;
267 int err;
268
269 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
270
271 cmd.width = sizes->surface_width;
272 cmd.height = sizes->surface_height;
273 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
274 tegra->pitch_align);
275
276 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
277 sizes->surface_depth);
278
279 size = cmd.pitches[0] * cmd.height;
280
281 bo = tegra_bo_create(drm, size, 0);
282 if (IS_ERR(bo))
283 return PTR_ERR(bo);
284
285 info = drm_fb_helper_alloc_fbi(helper);
286 if (IS_ERR(info)) {
287 dev_err(drm->dev, "failed to allocate framebuffer info\n");
288 drm_gem_object_put_unlocked(&bo->gem);
289 return PTR_ERR(info);
290 }
291
292 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
293 if (IS_ERR(fbdev->fb)) {
294 err = PTR_ERR(fbdev->fb);
295 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
296 err);
297 drm_gem_object_put_unlocked(&bo->gem);
298 return PTR_ERR(fbdev->fb);
299 }
300
301 fb = &fbdev->fb->base;
302 helper->fb = fb;
303 helper->fbdev = info;
304
305 info->par = helper;
306 info->flags = FBINFO_FLAG_DEFAULT;
307 info->fbops = &tegra_fb_ops;
308
309 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
310 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
311
312 offset = info->var.xoffset * bytes_per_pixel +
313 info->var.yoffset * fb->pitches[0];
314
315 if (bo->pages) {
316 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
317 pgprot_writecombine(PAGE_KERNEL));
318 if (!bo->vaddr) {
319 dev_err(drm->dev, "failed to vmap() framebuffer\n");
320 err = -ENOMEM;
321 goto destroy;
322 }
323 }
324
325 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
326 info->screen_base = (void __iomem *)bo->vaddr + offset;
327 info->screen_size = size;
328 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
329 info->fix.smem_len = size;
330
331 return 0;
332
333destroy:
334 drm_framebuffer_remove(fb);
335 return err;
336}
337
338static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
339 .fb_probe = tegra_fbdev_probe,
340};
341
342static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
343{
344 struct tegra_fbdev *fbdev;
345
346 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
347 if (!fbdev) {
348 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
349 return ERR_PTR(-ENOMEM);
350 }
351
352 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
353
354 return fbdev;
355}
356
357static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
358{
359 kfree(fbdev);
360}
361
362static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
363 unsigned int preferred_bpp,
364 unsigned int num_crtc,
365 unsigned int max_connectors)
366{
367 struct drm_device *drm = fbdev->base.dev;
368 int err;
369
370 err = drm_fb_helper_init(drm, &fbdev->base, max_connectors);
371 if (err < 0) {
372 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
373 err);
374 return err;
375 }
376
377 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
378 if (err < 0) {
379 dev_err(drm->dev, "failed to add connectors: %d\n", err);
380 goto fini;
381 }
382
383 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
384 if (err < 0) {
385 dev_err(drm->dev, "failed to set initial configuration: %d\n",
386 err);
387 goto fini;
388 }
389
390 return 0;
391
392fini:
393 drm_fb_helper_fini(&fbdev->base);
394 return err;
395}
396
397static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
398{
399 drm_fb_helper_unregister_fbi(&fbdev->base);
400
401 if (fbdev->fb)
402 drm_framebuffer_remove(&fbdev->fb->base);
403
404 drm_fb_helper_fini(&fbdev->base);
405 tegra_fbdev_free(fbdev);
406}
407#endif
408
409int tegra_drm_fb_prepare(struct drm_device *drm)
410{
411#ifdef CONFIG_DRM_FBDEV_EMULATION
412 struct tegra_drm *tegra = drm->dev_private;
413
414 tegra->fbdev = tegra_fbdev_create(drm);
415 if (IS_ERR(tegra->fbdev))
416 return PTR_ERR(tegra->fbdev);
417#endif
418
419 return 0;
420}
421
422void tegra_drm_fb_free(struct drm_device *drm)
423{
424#ifdef CONFIG_DRM_FBDEV_EMULATION
425 struct tegra_drm *tegra = drm->dev_private;
426
427 tegra_fbdev_free(tegra->fbdev);
428#endif
429}
430
431int tegra_drm_fb_init(struct drm_device *drm)
432{
433#ifdef CONFIG_DRM_FBDEV_EMULATION
434 struct tegra_drm *tegra = drm->dev_private;
435 int err;
436
437 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
438 drm->mode_config.num_connector);
439 if (err < 0)
440 return err;
441#endif
442
443 return 0;
444}
445
446void tegra_drm_fb_exit(struct drm_device *drm)
447{
448#ifdef CONFIG_DRM_FBDEV_EMULATION
449 struct tegra_drm *tegra = drm->dev_private;
450
451 tegra_fbdev_exit(tegra->fbdev);
452#endif
453}
454
455void tegra_drm_fb_suspend(struct drm_device *drm)
456{
457#ifdef CONFIG_DRM_FBDEV_EMULATION
458 struct tegra_drm *tegra = drm->dev_private;
459
460 console_lock();
461 drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
462 console_unlock();
463#endif
464}
465
466void tegra_drm_fb_resume(struct drm_device *drm)
467{
468#ifdef CONFIG_DRM_FBDEV_EMULATION
469 struct tegra_drm *tegra = drm->dev_private;
470
471 console_lock();
472 drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);
473 console_unlock();
474#endif
475}