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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 >= drm_format_num_planes(framebuffer->pixel_format))
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
56 /* TODO: handle YUV formats? */
57 *tiling = fb->planes[0]->tiling;
58
59 return 0;
60}
61
62static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
63{
64 struct tegra_fb *fb = to_tegra_fb(framebuffer);
65 unsigned int i;
66
67 for (i = 0; i < fb->num_planes; i++) {
68 struct tegra_bo *bo = fb->planes[i];
69
70 if (bo) {
71 if (bo->pages && bo->vaddr)
72 vunmap(bo->vaddr);
73
74 drm_gem_object_unreference_unlocked(&bo->gem);
75 }
76 }
77
78 drm_framebuffer_cleanup(framebuffer);
79 kfree(fb->planes);
80 kfree(fb);
81}
82
83static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
84 struct drm_file *file, unsigned int *handle)
85{
86 struct tegra_fb *fb = to_tegra_fb(framebuffer);
87
88 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
89}
90
91static const struct drm_framebuffer_funcs tegra_fb_funcs = {
92 .destroy = tegra_fb_destroy,
93 .create_handle = tegra_fb_create_handle,
94};
95
96static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
97 const struct drm_mode_fb_cmd2 *mode_cmd,
98 struct tegra_bo **planes,
99 unsigned int num_planes)
100{
101 struct tegra_fb *fb;
102 unsigned int i;
103 int err;
104
105 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
106 if (!fb)
107 return ERR_PTR(-ENOMEM);
108
109 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
110 if (!fb->planes) {
111 kfree(fb);
112 return ERR_PTR(-ENOMEM);
113 }
114
115 fb->num_planes = num_planes;
116
117 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
118
119 for (i = 0; i < fb->num_planes; i++)
120 fb->planes[i] = planes[i];
121
122 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
123 if (err < 0) {
124 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
125 err);
126 kfree(fb->planes);
127 kfree(fb);
128 return ERR_PTR(err);
129 }
130
131 return fb;
132}
133
134struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
135 struct drm_file *file,
136 const struct drm_mode_fb_cmd2 *cmd)
137{
138 unsigned int hsub, vsub, i;
139 struct tegra_bo *planes[4];
140 struct drm_gem_object *gem;
141 struct tegra_fb *fb;
142 int err;
143
144 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
145 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
146
147 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
148 unsigned int width = cmd->width / (i ? hsub : 1);
149 unsigned int height = cmd->height / (i ? vsub : 1);
150 unsigned int size, bpp;
151
152 gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
153 if (!gem) {
154 err = -ENXIO;
155 goto unreference;
156 }
157
158 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
159
160 size = (height - 1) * cmd->pitches[i] +
161 width * bpp + cmd->offsets[i];
162
163 if (gem->size < size) {
164 err = -EINVAL;
165 goto unreference;
166 }
167
168 planes[i] = to_tegra_bo(gem);
169 }
170
171 fb = tegra_fb_alloc(drm, cmd, planes, i);
172 if (IS_ERR(fb)) {
173 err = PTR_ERR(fb);
174 goto unreference;
175 }
176
177 return &fb->base;
178
179unreference:
180 while (i--)
181 drm_gem_object_unreference_unlocked(&planes[i]->gem);
182
183 return ERR_PTR(err);
184}
185
186#ifdef CONFIG_DRM_FBDEV_EMULATION
187static struct fb_ops tegra_fb_ops = {
188 .owner = THIS_MODULE,
189 .fb_fillrect = drm_fb_helper_sys_fillrect,
190 .fb_copyarea = drm_fb_helper_sys_copyarea,
191 .fb_imageblit = drm_fb_helper_sys_imageblit,
192 .fb_check_var = drm_fb_helper_check_var,
193 .fb_set_par = drm_fb_helper_set_par,
194 .fb_blank = drm_fb_helper_blank,
195 .fb_pan_display = drm_fb_helper_pan_display,
196 .fb_setcmap = drm_fb_helper_setcmap,
197};
198
199static int tegra_fbdev_probe(struct drm_fb_helper *helper,
200 struct drm_fb_helper_surface_size *sizes)
201{
202 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
203 struct tegra_drm *tegra = helper->dev->dev_private;
204 struct drm_device *drm = helper->dev;
205 struct drm_mode_fb_cmd2 cmd = { 0 };
206 unsigned int bytes_per_pixel;
207 struct drm_framebuffer *fb;
208 unsigned long offset;
209 struct fb_info *info;
210 struct tegra_bo *bo;
211 size_t size;
212 int err;
213
214 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
215
216 cmd.width = sizes->surface_width;
217 cmd.height = sizes->surface_height;
218 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
219 tegra->pitch_align);
220 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
221 sizes->surface_depth);
222
223 size = cmd.pitches[0] * cmd.height;
224
225 bo = tegra_bo_create(drm, size, 0);
226 if (IS_ERR(bo))
227 return PTR_ERR(bo);
228
229 info = drm_fb_helper_alloc_fbi(helper);
230 if (IS_ERR(info)) {
231 dev_err(drm->dev, "failed to allocate framebuffer info\n");
232 drm_gem_object_unreference_unlocked(&bo->gem);
233 return PTR_ERR(info);
234 }
235
236 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
237 if (IS_ERR(fbdev->fb)) {
238 err = PTR_ERR(fbdev->fb);
239 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
240 err);
241 drm_gem_object_unreference_unlocked(&bo->gem);
242 goto release;
243 }
244
245 fb = &fbdev->fb->base;
246 helper->fb = fb;
247 helper->fbdev = info;
248
249 info->par = helper;
250 info->flags = FBINFO_FLAG_DEFAULT;
251 info->fbops = &tegra_fb_ops;
252
253 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
254 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
255
256 offset = info->var.xoffset * bytes_per_pixel +
257 info->var.yoffset * fb->pitches[0];
258
259 if (bo->pages) {
260 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
261 pgprot_writecombine(PAGE_KERNEL));
262 if (!bo->vaddr) {
263 dev_err(drm->dev, "failed to vmap() framebuffer\n");
264 err = -ENOMEM;
265 goto destroy;
266 }
267 }
268
269 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
270 info->screen_base = (void __iomem *)bo->vaddr + offset;
271 info->screen_size = size;
272 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
273 info->fix.smem_len = size;
274
275 return 0;
276
277destroy:
278 drm_framebuffer_unregister_private(fb);
279 tegra_fb_destroy(fb);
280release:
281 drm_fb_helper_release_fbi(helper);
282 return err;
283}
284
285static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
286 .fb_probe = tegra_fbdev_probe,
287};
288
289static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
290{
291 struct tegra_fbdev *fbdev;
292
293 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
294 if (!fbdev) {
295 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
296 return ERR_PTR(-ENOMEM);
297 }
298
299 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
300
301 return fbdev;
302}
303
304static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
305{
306 kfree(fbdev);
307}
308
309static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
310 unsigned int preferred_bpp,
311 unsigned int num_crtc,
312 unsigned int max_connectors)
313{
314 struct drm_device *drm = fbdev->base.dev;
315 int err;
316
317 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
318 if (err < 0) {
319 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
320 err);
321 return err;
322 }
323
324 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
325 if (err < 0) {
326 dev_err(drm->dev, "failed to add connectors: %d\n", err);
327 goto fini;
328 }
329
330 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
331 if (err < 0) {
332 dev_err(drm->dev, "failed to set initial configuration: %d\n",
333 err);
334 goto fini;
335 }
336
337 return 0;
338
339fini:
340 drm_fb_helper_fini(&fbdev->base);
341 return err;
342}
343
344static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
345{
346 drm_fb_helper_unregister_fbi(&fbdev->base);
347 drm_fb_helper_release_fbi(&fbdev->base);
348
349 if (fbdev->fb) {
350 drm_framebuffer_unregister_private(&fbdev->fb->base);
351 drm_framebuffer_remove(&fbdev->fb->base);
352 }
353
354 drm_fb_helper_fini(&fbdev->base);
355 tegra_fbdev_free(fbdev);
356}
357
358void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
359{
360 if (fbdev)
361 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
362}
363
364void tegra_fb_output_poll_changed(struct drm_device *drm)
365{
366 struct tegra_drm *tegra = drm->dev_private;
367
368 if (tegra->fbdev)
369 drm_fb_helper_hotplug_event(&tegra->fbdev->base);
370}
371#endif
372
373int tegra_drm_fb_prepare(struct drm_device *drm)
374{
375#ifdef CONFIG_DRM_FBDEV_EMULATION
376 struct tegra_drm *tegra = drm->dev_private;
377
378 tegra->fbdev = tegra_fbdev_create(drm);
379 if (IS_ERR(tegra->fbdev))
380 return PTR_ERR(tegra->fbdev);
381#endif
382
383 return 0;
384}
385
386void tegra_drm_fb_free(struct drm_device *drm)
387{
388#ifdef CONFIG_DRM_FBDEV_EMULATION
389 struct tegra_drm *tegra = drm->dev_private;
390
391 tegra_fbdev_free(tegra->fbdev);
392#endif
393}
394
395int tegra_drm_fb_init(struct drm_device *drm)
396{
397#ifdef CONFIG_DRM_FBDEV_EMULATION
398 struct tegra_drm *tegra = drm->dev_private;
399 int err;
400
401 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
402 drm->mode_config.num_connector);
403 if (err < 0)
404 return err;
405#endif
406
407 return 0;
408}
409
410void tegra_drm_fb_exit(struct drm_device *drm)
411{
412#ifdef CONFIG_DRM_FBDEV_EMULATION
413 struct tegra_drm *tegra = drm->dev_private;
414
415 tegra_fbdev_exit(tegra->fbdev);
416#endif
417}
418
419void tegra_drm_fb_suspend(struct drm_device *drm)
420{
421#ifdef CONFIG_DRM_FBDEV_EMULATION
422 struct tegra_drm *tegra = drm->dev_private;
423
424 console_lock();
425 drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
426 console_unlock();
427#endif
428}
429
430void tegra_drm_fb_resume(struct drm_device *drm)
431{
432#ifdef CONFIG_DRM_FBDEV_EMULATION
433 struct tegra_drm *tegra = drm->dev_private;
434
435 console_lock();
436 drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);
437 console_unlock();
438#endif
439}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012-2013 Avionic Design GmbH
4 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
5 *
6 * Based on the KMS/FB DMA helpers
7 * Copyright (C) 2012 Analog Devices Inc.
8 */
9
10#include <linux/console.h>
11
12#include <drm/drm_fourcc.h>
13#include <drm/drm_framebuffer.h>
14#include <drm/drm_gem_framebuffer_helper.h>
15#include <drm/drm_modeset_helper.h>
16
17#include "drm.h"
18#include "gem.h"
19
20struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
21 unsigned int index)
22{
23 return to_tegra_bo(drm_gem_fb_get_obj(framebuffer, index));
24}
25
26bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
27{
28 struct tegra_bo *bo = tegra_fb_get_plane(framebuffer, 0);
29
30 if (bo->flags & TEGRA_BO_BOTTOM_UP)
31 return true;
32
33 return false;
34}
35
36int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
37 struct tegra_bo_tiling *tiling)
38{
39 uint64_t modifier = framebuffer->modifier;
40
41 if (fourcc_mod_is_vendor(modifier, NVIDIA)) {
42 if ((modifier & DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT) == 0)
43 tiling->sector_layout = TEGRA_BO_SECTOR_LAYOUT_TEGRA;
44 else
45 tiling->sector_layout = TEGRA_BO_SECTOR_LAYOUT_GPU;
46
47 modifier &= ~DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT;
48 }
49
50 switch (modifier) {
51 case DRM_FORMAT_MOD_LINEAR:
52 tiling->mode = TEGRA_BO_TILING_MODE_PITCH;
53 tiling->value = 0;
54 break;
55
56 case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED:
57 tiling->mode = TEGRA_BO_TILING_MODE_TILED;
58 tiling->value = 0;
59 break;
60
61 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0):
62 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
63 tiling->value = 0;
64 break;
65
66 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1):
67 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
68 tiling->value = 1;
69 break;
70
71 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2):
72 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
73 tiling->value = 2;
74 break;
75
76 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3):
77 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
78 tiling->value = 3;
79 break;
80
81 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4):
82 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
83 tiling->value = 4;
84 break;
85
86 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5):
87 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
88 tiling->value = 5;
89 break;
90
91 default:
92 DRM_DEBUG_KMS("unknown format modifier: %llx\n", modifier);
93 return -EINVAL;
94 }
95
96 return 0;
97}
98
99static const struct drm_framebuffer_funcs tegra_fb_funcs = {
100 .destroy = drm_gem_fb_destroy,
101 .create_handle = drm_gem_fb_create_handle,
102};
103
104struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm,
105 const struct drm_mode_fb_cmd2 *mode_cmd,
106 struct tegra_bo **planes,
107 unsigned int num_planes)
108{
109 struct drm_framebuffer *fb;
110 unsigned int i;
111 int err;
112
113 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
114 if (!fb)
115 return ERR_PTR(-ENOMEM);
116
117 drm_helper_mode_fill_fb_struct(drm, fb, mode_cmd);
118
119 for (i = 0; i < fb->format->num_planes; i++)
120 fb->obj[i] = &planes[i]->gem;
121
122 err = drm_framebuffer_init(drm, fb, &tegra_fb_funcs);
123 if (err < 0) {
124 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
125 err);
126 kfree(fb);
127 return ERR_PTR(err);
128 }
129
130 return fb;
131}
132
133struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
134 struct drm_file *file,
135 const struct drm_mode_fb_cmd2 *cmd)
136{
137 const struct drm_format_info *info = drm_get_format_info(drm, cmd);
138 struct tegra_bo *planes[4];
139 struct drm_gem_object *gem;
140 struct drm_framebuffer *fb;
141 unsigned int i;
142 int err;
143
144 for (i = 0; i < info->num_planes; i++) {
145 unsigned int width = cmd->width / (i ? info->hsub : 1);
146 unsigned int height = cmd->height / (i ? info->vsub : 1);
147 unsigned int size, bpp;
148
149 gem = drm_gem_object_lookup(file, cmd->handles[i]);
150 if (!gem) {
151 err = -ENXIO;
152 goto unreference;
153 }
154
155 bpp = info->cpp[i];
156
157 size = (height - 1) * cmd->pitches[i] +
158 width * bpp + cmd->offsets[i];
159
160 if (gem->size < size) {
161 err = -EINVAL;
162 goto unreference;
163 }
164
165 planes[i] = to_tegra_bo(gem);
166 }
167
168 fb = tegra_fb_alloc(drm, cmd, planes, i);
169 if (IS_ERR(fb)) {
170 err = PTR_ERR(fb);
171 goto unreference;
172 }
173
174 return fb;
175
176unreference:
177 while (i--)
178 drm_gem_object_put(&planes[i]->gem);
179
180 return ERR_PTR(err);
181}