summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/tegra/fb.c
blob: 7cea89f29a5c8bacc29ed84f0a6dec04f1247a6e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012-2013 Avionic Design GmbH
 * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
 *
 * Based on the KMS/FB CMA helpers
 *   Copyright (C) 2012 Analog Device Inc.
 */

#include <linux/console.h>

#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_helper.h>

#include "drm.h"
#include "gem.h"

#ifdef CONFIG_DRM_FBDEV_EMULATION
static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
{
	return container_of(helper, struct tegra_fbdev, base);
}
#endif

struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
				    unsigned int index)
{
	return to_tegra_bo(drm_gem_fb_get_obj(framebuffer, index));
}

bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
{
	struct tegra_bo *bo = tegra_fb_get_plane(framebuffer, 0);

	if (bo->flags & TEGRA_BO_BOTTOM_UP)
		return true;

	return false;
}

int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
			struct tegra_bo_tiling *tiling)
{
	uint64_t modifier = framebuffer->modifier;

	switch (modifier) {
	case DRM_FORMAT_MOD_LINEAR:
		tiling->mode = TEGRA_BO_TILING_MODE_PITCH;
		tiling->value = 0;
		break;

	case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED:
		tiling->mode = TEGRA_BO_TILING_MODE_TILED;
		tiling->value = 0;
		break;

	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0):
		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
		tiling->value = 0;
		break;

	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1):
		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
		tiling->value = 1;
		break;

	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2):
		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
		tiling->value = 2;
		break;

	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3):
		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
		tiling->value = 3;
		break;

	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4):
		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
		tiling->value = 4;
		break;

	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5):
		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
		tiling->value = 5;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static const struct drm_framebuffer_funcs tegra_fb_funcs = {
	.destroy = drm_gem_fb_destroy,
	.create_handle = drm_gem_fb_create_handle,
};

static struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm,
					      const struct drm_mode_fb_cmd2 *mode_cmd,
					      struct tegra_bo **planes,
					      unsigned int num_planes)
{
	struct drm_framebuffer *fb;
	unsigned int i;
	int err;

	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
	if (!fb)
		return ERR_PTR(-ENOMEM);

	drm_helper_mode_fill_fb_struct(drm, fb, mode_cmd);

	for (i = 0; i < fb->format->num_planes; i++)
		fb->obj[i] = &planes[i]->gem;

	err = drm_framebuffer_init(drm, fb, &tegra_fb_funcs);
	if (err < 0) {
		dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
			err);
		kfree(fb);
		return ERR_PTR(err);
	}

	return fb;
}

struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
					struct drm_file *file,
					const struct drm_mode_fb_cmd2 *cmd)
{
	const struct drm_format_info *info = drm_get_format_info(drm, cmd);
	struct tegra_bo *planes[4];
	struct drm_gem_object *gem;
	struct drm_framebuffer *fb;
	unsigned int i;
	int err;

	for (i = 0; i < info->num_planes; i++) {
		unsigned int width = cmd->width / (i ? info->hsub : 1);
		unsigned int height = cmd->height / (i ? info->vsub : 1);
		unsigned int size, bpp;

		gem = drm_gem_object_lookup(file, cmd->handles[i]);
		if (!gem) {
			err = -ENXIO;
			goto unreference;
		}

		bpp = info->cpp[i];

		size = (height - 1) * cmd->pitches[i] +
		       width * bpp + cmd->offsets[i];

		if (gem->size < size) {
			err = -EINVAL;
			goto unreference;
		}

		planes[i] = to_tegra_bo(gem);
	}

	fb = tegra_fb_alloc(drm, cmd, planes, i);
	if (IS_ERR(fb)) {
		err = PTR_ERR(fb);
		goto unreference;
	}

	return fb;

unreference:
	while (i--)
		drm_gem_object_put_unlocked(&planes[i]->gem);

	return ERR_PTR(err);
}

#ifdef CONFIG_DRM_FBDEV_EMULATION
static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct drm_fb_helper *helper = info->par;
	struct tegra_bo *bo;
	int err;

	bo = tegra_fb_get_plane(helper->fb, 0);

	err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma);
	if (err < 0)
		return err;

	return __tegra_gem_mmap(&bo->gem, vma);
}

static struct fb_ops tegra_fb_ops = {
	.owner = THIS_MODULE,
	DRM_FB_HELPER_DEFAULT_OPS,
	.fb_fillrect = drm_fb_helper_sys_fillrect,
	.fb_copyarea = drm_fb_helper_sys_copyarea,
	.fb_imageblit = drm_fb_helper_sys_imageblit,
	.fb_mmap = tegra_fb_mmap,
};

static int tegra_fbdev_probe(struct drm_fb_helper *helper,
			     struct drm_fb_helper_surface_size *sizes)
{
	struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
	struct tegra_drm *tegra = helper->dev->dev_private;
	struct drm_device *drm = helper->dev;
	struct drm_mode_fb_cmd2 cmd = { 0 };
	unsigned int bytes_per_pixel;
	struct drm_framebuffer *fb;
	unsigned long offset;
	struct fb_info *info;
	struct tegra_bo *bo;
	size_t size;
	int err;

	bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);

	cmd.width = sizes->surface_width;
	cmd.height = sizes->surface_height;
	cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
				  tegra->pitch_align);

	cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
						     sizes->surface_depth);

	size = cmd.pitches[0] * cmd.height;

	bo = tegra_bo_create(drm, size, 0);
	if (IS_ERR(bo))
		return PTR_ERR(bo);

	info = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(info)) {
		dev_err(drm->dev, "failed to allocate framebuffer info\n");
		drm_gem_object_put_unlocked(&bo->gem);
		return PTR_ERR(info);
	}

	fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
	if (IS_ERR(fbdev->fb)) {
		err = PTR_ERR(fbdev->fb);
		dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
			err);
		drm_gem_object_put_unlocked(&bo->gem);
		return PTR_ERR(fbdev->fb);
	}

	fb = fbdev->fb;
	helper->fb = fb;
	helper->fbdev = info;

	info->fbops = &tegra_fb_ops;

	drm_fb_helper_fill_info(info, helper, sizes);

	offset = info->var.xoffset * bytes_per_pixel +
		 info->var.yoffset * fb->pitches[0];

	if (bo->pages) {
		bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
				 pgprot_writecombine(PAGE_KERNEL));
		if (!bo->vaddr) {
			dev_err(drm->dev, "failed to vmap() framebuffer\n");
			err = -ENOMEM;
			goto destroy;
		}
	}

	drm->mode_config.fb_base = (resource_size_t)bo->iova;
	info->screen_base = (void __iomem *)bo->vaddr + offset;
	info->screen_size = size;
	info->fix.smem_start = (unsigned long)(bo->iova + offset);
	info->fix.smem_len = size;

	return 0;

destroy:
	drm_framebuffer_remove(fb);
	return err;
}

static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
	.fb_probe = tegra_fbdev_probe,
};

static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
{
	struct tegra_fbdev *fbdev;

	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	if (!fbdev) {
		dev_err(drm->dev, "failed to allocate DRM fbdev\n");
		return ERR_PTR(-ENOMEM);
	}

	drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);

	return fbdev;
}

static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
{
	kfree(fbdev);
}

static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
			    unsigned int preferred_bpp,
			    unsigned int num_crtc,
			    unsigned int max_connectors)
{
	struct drm_device *drm = fbdev->base.dev;
	int err;

	err = drm_fb_helper_init(drm, &fbdev->base, max_connectors);
	if (err < 0) {
		dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
			err);
		return err;
	}

	err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
	if (err < 0) {
		dev_err(drm->dev, "failed to add connectors: %d\n", err);
		goto fini;
	}

	err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
	if (err < 0) {
		dev_err(drm->dev, "failed to set initial configuration: %d\n",
			err);
		goto fini;
	}

	return 0;

fini:
	drm_fb_helper_fini(&fbdev->base);
	return err;
}

static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
{
	drm_fb_helper_unregister_fbi(&fbdev->base);

	if (fbdev->fb) {
		struct tegra_bo *bo = tegra_fb_get_plane(fbdev->fb, 0);

		/* Undo the special mapping we made in fbdev probe. */
		if (bo && bo->pages) {
			vunmap(bo->vaddr);
			bo->vaddr = NULL;
		}

		drm_framebuffer_remove(fbdev->fb);
	}

	drm_fb_helper_fini(&fbdev->base);
	tegra_fbdev_free(fbdev);
}
#endif

int tegra_drm_fb_prepare(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
	struct tegra_drm *tegra = drm->dev_private;

	tegra->fbdev = tegra_fbdev_create(drm);
	if (IS_ERR(tegra->fbdev))
		return PTR_ERR(tegra->fbdev);
#endif

	return 0;
}

void tegra_drm_fb_free(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
	struct tegra_drm *tegra = drm->dev_private;

	tegra_fbdev_free(tegra->fbdev);
#endif
}

int tegra_drm_fb_init(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
	struct tegra_drm *tegra = drm->dev_private;
	int err;

	err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
			       drm->mode_config.num_connector);
	if (err < 0)
		return err;
#endif

	return 0;
}

void tegra_drm_fb_exit(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
	struct tegra_drm *tegra = drm->dev_private;

	tegra_fbdev_exit(tegra->fbdev);
#endif
}