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