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13#include "drm.h"
14#include "gem.h"
15
16static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
17{
18 return container_of(fb, struct tegra_fb, base);
19}
20
21#ifdef CONFIG_DRM_TEGRA_FBDEV
22static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
23{
24 return container_of(helper, struct tegra_fbdev, base);
25}
26#endif
27
28struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
29 unsigned int index)
30{
31 struct tegra_fb *fb = to_tegra_fb(framebuffer);
32
33 if (index >= drm_format_num_planes(framebuffer->pixel_format))
34 return NULL;
35
36 return fb->planes[index];
37}
38
39bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
40{
41 struct tegra_fb *fb = to_tegra_fb(framebuffer);
42
43 if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
44 return true;
45
46 return false;
47}
48
49int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
50 struct tegra_bo_tiling *tiling)
51{
52 struct tegra_fb *fb = to_tegra_fb(framebuffer);
53
54
55 *tiling = fb->planes[0]->tiling;
56
57 return 0;
58}
59
60static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
61{
62 struct tegra_fb *fb = to_tegra_fb(framebuffer);
63 unsigned int i;
64
65 for (i = 0; i < fb->num_planes; i++) {
66 struct tegra_bo *bo = fb->planes[i];
67
68 if (bo) {
69 if (bo->pages && bo->vaddr)
70 vunmap(bo->vaddr);
71
72 drm_gem_object_unreference_unlocked(&bo->gem);
73 }
74 }
75
76 drm_framebuffer_cleanup(framebuffer);
77 kfree(fb->planes);
78 kfree(fb);
79}
80
81static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
82 struct drm_file *file, unsigned int *handle)
83{
84 struct tegra_fb *fb = to_tegra_fb(framebuffer);
85
86 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
87}
88
89static struct drm_framebuffer_funcs tegra_fb_funcs = {
90 .destroy = tegra_fb_destroy,
91 .create_handle = tegra_fb_create_handle,
92};
93
94static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
95 struct drm_mode_fb_cmd2 *mode_cmd,
96 struct tegra_bo **planes,
97 unsigned int num_planes)
98{
99 struct tegra_fb *fb;
100 unsigned int i;
101 int err;
102
103 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
104 if (!fb)
105 return ERR_PTR(-ENOMEM);
106
107 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
108 if (!fb->planes) {
109 kfree(fb);
110 return ERR_PTR(-ENOMEM);
111 }
112
113 fb->num_planes = num_planes;
114
115 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
116
117 for (i = 0; i < fb->num_planes; i++)
118 fb->planes[i] = planes[i];
119
120 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
121 if (err < 0) {
122 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
123 err);
124 kfree(fb->planes);
125 kfree(fb);
126 return ERR_PTR(err);
127 }
128
129 return fb;
130}
131
132static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
133 struct drm_file *file,
134 struct drm_mode_fb_cmd2 *cmd)
135{
136 unsigned int hsub, vsub, i;
137 struct tegra_bo *planes[4];
138 struct drm_gem_object *gem;
139 struct tegra_fb *fb;
140 int err;
141
142 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
143 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
144
145 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
146 unsigned int width = cmd->width / (i ? hsub : 1);
147 unsigned int height = cmd->height / (i ? vsub : 1);
148 unsigned int size, bpp;
149
150 gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
151 if (!gem) {
152 err = -ENXIO;
153 goto unreference;
154 }
155
156 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
157
158 size = (height - 1) * cmd->pitches[i] +
159 width * bpp + cmd->offsets[i];
160
161 if (gem->size < size) {
162 err = -EINVAL;
163 goto unreference;
164 }
165
166 planes[i] = to_tegra_bo(gem);
167 }
168
169 fb = tegra_fb_alloc(drm, cmd, planes, i);
170 if (IS_ERR(fb)) {
171 err = PTR_ERR(fb);
172 goto unreference;
173 }
174
175 return &fb->base;
176
177unreference:
178 while (i--)
179 drm_gem_object_unreference_unlocked(&planes[i]->gem);
180
181 return ERR_PTR(err);
182}
183
184#ifdef CONFIG_DRM_TEGRA_FBDEV
185static struct fb_ops tegra_fb_ops = {
186 .owner = THIS_MODULE,
187 .fb_fillrect = sys_fillrect,
188 .fb_copyarea = sys_copyarea,
189 .fb_imageblit = sys_imageblit,
190 .fb_check_var = drm_fb_helper_check_var,
191 .fb_set_par = drm_fb_helper_set_par,
192 .fb_blank = drm_fb_helper_blank,
193 .fb_pan_display = drm_fb_helper_pan_display,
194 .fb_setcmap = drm_fb_helper_setcmap,
195};
196
197static int tegra_fbdev_probe(struct drm_fb_helper *helper,
198 struct drm_fb_helper_surface_size *sizes)
199{
200 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
201 struct tegra_drm *tegra = helper->dev->dev_private;
202 struct drm_device *drm = helper->dev;
203 struct drm_mode_fb_cmd2 cmd = { 0 };
204 unsigned int bytes_per_pixel;
205 struct drm_framebuffer *fb;
206 unsigned long offset;
207 struct fb_info *info;
208 struct tegra_bo *bo;
209 size_t size;
210 int err;
211
212 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
213
214 cmd.width = sizes->surface_width;
215 cmd.height = sizes->surface_height;
216 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
217 tegra->pitch_align);
218 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
219 sizes->surface_depth);
220
221 size = cmd.pitches[0] * cmd.height;
222
223 bo = tegra_bo_create(drm, size, 0);
224 if (IS_ERR(bo))
225 return PTR_ERR(bo);
226
227 info = framebuffer_alloc(0, drm->dev);
228 if (!info) {
229 dev_err(drm->dev, "failed to allocate framebuffer info\n");
230 drm_gem_object_unreference_unlocked(&bo->gem);
231 return -ENOMEM;
232 }
233
234 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
235 if (IS_ERR(fbdev->fb)) {
236 err = PTR_ERR(fbdev->fb);
237 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
238 err);
239 drm_gem_object_unreference_unlocked(&bo->gem);
240 goto release;
241 }
242
243 fb = &fbdev->fb->base;
244 helper->fb = fb;
245 helper->fbdev = info;
246
247 info->par = helper;
248 info->flags = FBINFO_FLAG_DEFAULT;
249 info->fbops = &tegra_fb_ops;
250
251 err = fb_alloc_cmap(&info->cmap, 256, 0);
252 if (err < 0) {
253 dev_err(drm->dev, "failed to allocate color map: %d\n", err);
254 goto destroy;
255 }
256
257 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
258 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
259
260 offset = info->var.xoffset * bytes_per_pixel +
261 info->var.yoffset * fb->pitches[0];
262
263 if (bo->pages) {
264 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
265 pgprot_writecombine(PAGE_KERNEL));
266 if (!bo->vaddr) {
267 dev_err(drm->dev, "failed to vmap() framebuffer\n");
268 err = -ENOMEM;
269 goto destroy;
270 }
271 }
272
273 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
274 info->screen_base = (void __iomem *)bo->vaddr + offset;
275 info->screen_size = size;
276 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
277 info->fix.smem_len = size;
278
279 return 0;
280
281destroy:
282 drm_framebuffer_unregister_private(fb);
283 tegra_fb_destroy(fb);
284release:
285 framebuffer_release(info);
286 return err;
287}
288
289static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
290 .fb_probe = tegra_fbdev_probe,
291};
292
293static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
294{
295 struct tegra_fbdev *fbdev;
296
297 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
298 if (!fbdev) {
299 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
300 return ERR_PTR(-ENOMEM);
301 }
302
303 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
304
305 return fbdev;
306}
307
308static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
309{
310 kfree(fbdev);
311}
312
313static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
314 unsigned int preferred_bpp,
315 unsigned int num_crtc,
316 unsigned int max_connectors)
317{
318 struct drm_device *drm = fbdev->base.dev;
319 int err;
320
321 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
322 if (err < 0) {
323 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
324 err);
325 return err;
326 }
327
328 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
329 if (err < 0) {
330 dev_err(drm->dev, "failed to add connectors: %d\n", err);
331 goto fini;
332 }
333
334 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
335 if (err < 0) {
336 dev_err(drm->dev, "failed to set initial configuration: %d\n",
337 err);
338 goto fini;
339 }
340
341 return 0;
342
343fini:
344 drm_fb_helper_fini(&fbdev->base);
345 return err;
346}
347
348static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
349{
350 struct fb_info *info = fbdev->base.fbdev;
351
352 if (info) {
353 int err;
354
355 err = unregister_framebuffer(info);
356 if (err < 0)
357 DRM_DEBUG_KMS("failed to unregister framebuffer\n");
358
359 if (info->cmap.len)
360 fb_dealloc_cmap(&info->cmap);
361
362 framebuffer_release(info);
363 }
364
365 if (fbdev->fb) {
366 drm_framebuffer_unregister_private(&fbdev->fb->base);
367 drm_framebuffer_remove(&fbdev->fb->base);
368 }
369
370 drm_fb_helper_fini(&fbdev->base);
371 tegra_fbdev_free(fbdev);
372}
373
374void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
375{
376 if (fbdev)
377 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
378}
379
380static void tegra_fb_output_poll_changed(struct drm_device *drm)
381{
382 struct tegra_drm *tegra = drm->dev_private;
383
384 if (tegra->fbdev)
385 drm_fb_helper_hotplug_event(&tegra->fbdev->base);
386}
387#endif
388
389static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
390 .fb_create = tegra_fb_create,
391#ifdef CONFIG_DRM_TEGRA_FBDEV
392 .output_poll_changed = tegra_fb_output_poll_changed,
393#endif
394};
395
396int tegra_drm_fb_prepare(struct drm_device *drm)
397{
398#ifdef CONFIG_DRM_TEGRA_FBDEV
399 struct tegra_drm *tegra = drm->dev_private;
400#endif
401
402 drm->mode_config.min_width = 0;
403 drm->mode_config.min_height = 0;
404
405 drm->mode_config.max_width = 4096;
406 drm->mode_config.max_height = 4096;
407
408 drm->mode_config.funcs = &tegra_drm_mode_funcs;
409
410#ifdef CONFIG_DRM_TEGRA_FBDEV
411 tegra->fbdev = tegra_fbdev_create(drm);
412 if (IS_ERR(tegra->fbdev))
413 return PTR_ERR(tegra->fbdev);
414#endif
415
416 return 0;
417}
418
419void tegra_drm_fb_free(struct drm_device *drm)
420{
421#ifdef CONFIG_DRM_TEGRA_FBDEV
422 struct tegra_drm *tegra = drm->dev_private;
423
424 tegra_fbdev_free(tegra->fbdev);
425#endif
426}
427
428int tegra_drm_fb_init(struct drm_device *drm)
429{
430#ifdef CONFIG_DRM_TEGRA_FBDEV
431 struct tegra_drm *tegra = drm->dev_private;
432 int err;
433
434 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
435 drm->mode_config.num_connector);
436 if (err < 0)
437 return err;
438#endif
439
440 return 0;
441}
442
443void tegra_drm_fb_exit(struct drm_device *drm)
444{
445#ifdef CONFIG_DRM_TEGRA_FBDEV
446 struct tegra_drm *tegra = drm->dev_private;
447
448 tegra_fbdev_exit(tegra->fbdev);
449#endif
450}
451
