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Commit | Line | Data |
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1c248b7d ID |
1 | /* exynos_drm_fbdev.c |
2 | * | |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
4 | * Authors: | |
5 | * Inki Dae <inki.dae@samsung.com> | |
6 | * Joonyoung Shim <jy0922.shim@samsung.com> | |
7 | * Seung-Woo Kim <sw0312.kim@samsung.com> | |
8 | * | |
d81aecb5 ID |
9 | * This program is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
1c248b7d ID |
13 | */ |
14 | ||
760285e7 DH |
15 | #include <drm/drmP.h> |
16 | #include <drm/drm_crtc.h> | |
17 | #include <drm/drm_fb_helper.h> | |
18 | #include <drm/drm_crtc_helper.h> | |
a1bfacf4 | 19 | #include <drm/exynos_drm.h> |
1c248b7d ID |
20 | |
21 | #include "exynos_drm_drv.h" | |
22 | #include "exynos_drm_fb.h" | |
e30655d0 | 23 | #include "exynos_drm_fbdev.h" |
2c871127 | 24 | #include "exynos_drm_gem.h" |
c704f1b4 | 25 | #include "exynos_drm_iommu.h" |
1c248b7d ID |
26 | |
27 | #define MAX_CONNECTOR 4 | |
28 | #define PREFERRED_BPP 32 | |
29 | ||
30 | #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\ | |
31 | drm_fb_helper) | |
32 | ||
33 | struct exynos_drm_fbdev { | |
e1533c08 JS |
34 | struct drm_fb_helper drm_fb_helper; |
35 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
1c248b7d ID |
36 | }; |
37 | ||
dd265850 P |
38 | static int exynos_drm_fb_mmap(struct fb_info *info, |
39 | struct vm_area_struct *vma) | |
40 | { | |
41 | struct drm_fb_helper *helper = info->par; | |
42 | struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper); | |
43 | struct exynos_drm_gem_obj *exynos_gem_obj = exynos_fbd->exynos_gem_obj; | |
44 | struct exynos_drm_gem_buf *buffer = exynos_gem_obj->buffer; | |
45 | unsigned long vm_size; | |
46 | int ret; | |
47 | ||
dd265850 P |
48 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
49 | ||
50 | vm_size = vma->vm_end - vma->vm_start; | |
51 | ||
52 | if (vm_size > buffer->size) | |
53 | return -EINVAL; | |
54 | ||
4744ad24 | 55 | ret = dma_mmap_attrs(helper->dev->dev, vma, buffer->pages, |
dd265850 P |
56 | buffer->dma_addr, buffer->size, &buffer->dma_attrs); |
57 | if (ret < 0) { | |
58 | DRM_ERROR("failed to mmap.\n"); | |
59 | return ret; | |
60 | } | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
1c248b7d ID |
65 | static struct fb_ops exynos_drm_fb_ops = { |
66 | .owner = THIS_MODULE, | |
dd265850 | 67 | .fb_mmap = exynos_drm_fb_mmap, |
1c248b7d ID |
68 | .fb_fillrect = cfb_fillrect, |
69 | .fb_copyarea = cfb_copyarea, | |
70 | .fb_imageblit = cfb_imageblit, | |
71 | .fb_check_var = drm_fb_helper_check_var, | |
83b316fd | 72 | .fb_set_par = drm_fb_helper_set_par, |
1c248b7d ID |
73 | .fb_blank = drm_fb_helper_blank, |
74 | .fb_pan_display = drm_fb_helper_pan_display, | |
75 | .fb_setcmap = drm_fb_helper_setcmap, | |
76 | }; | |
77 | ||
19c8b834 | 78 | static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, |
aa6b2b6c | 79 | struct drm_framebuffer *fb) |
1c248b7d ID |
80 | { |
81 | struct fb_info *fbi = helper->fbdev; | |
82 | struct drm_device *dev = helper->dev; | |
2c871127 | 83 | struct exynos_drm_gem_buf *buffer; |
aa6b2b6c | 84 | unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3); |
19c8b834 | 85 | unsigned long offset; |
1c248b7d | 86 | |
01f2c773 | 87 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); |
aa6b2b6c | 88 | drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height); |
1c248b7d | 89 | |
229d3534 SWK |
90 | /* RGB formats use only one buffer */ |
91 | buffer = exynos_drm_fb_buffer(fb, 0); | |
2c871127 | 92 | if (!buffer) { |
133dcdeb | 93 | DRM_DEBUG_KMS("buffer is null.\n"); |
19c8b834 ID |
94 | return -EFAULT; |
95 | } | |
1c248b7d | 96 | |
4744ad24 ID |
97 | /* map pages with kernel virtual space. */ |
98 | if (!buffer->kvaddr) { | |
c704f1b4 ID |
99 | if (is_drm_iommu_supported(dev)) { |
100 | unsigned int nr_pages = buffer->size >> PAGE_SHIFT; | |
101 | ||
fafb3837 SK |
102 | buffer->kvaddr = (void __iomem *) vmap(buffer->pages, |
103 | nr_pages, VM_MAP, | |
4744ad24 | 104 | pgprot_writecombine(PAGE_KERNEL)); |
c704f1b4 ID |
105 | } else { |
106 | phys_addr_t dma_addr = buffer->dma_addr; | |
107 | if (dma_addr) | |
fafb3837 | 108 | buffer->kvaddr = (void __iomem *)phys_to_virt(dma_addr); |
c704f1b4 ID |
109 | else |
110 | buffer->kvaddr = (void __iomem *)NULL; | |
111 | } | |
4744ad24 ID |
112 | if (!buffer->kvaddr) { |
113 | DRM_ERROR("failed to map pages to kernel space.\n"); | |
114 | return -EIO; | |
115 | } | |
116 | } | |
117 | ||
01ed8126 ID |
118 | /* buffer count to framebuffer always is 1 at booting time. */ |
119 | exynos_drm_fb_set_buf_cnt(fb, 1); | |
120 | ||
19c8b834 | 121 | offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3); |
01f2c773 | 122 | offset += fbi->var.yoffset * fb->pitches[0]; |
1c248b7d | 123 | |
2c871127 | 124 | fbi->screen_base = buffer->kvaddr + offset; |
1c248b7d | 125 | fbi->screen_size = size; |
19c8b834 ID |
126 | |
127 | return 0; | |
1c248b7d ID |
128 | } |
129 | ||
130 | static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, | |
131 | struct drm_fb_helper_surface_size *sizes) | |
132 | { | |
133 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); | |
e1533c08 | 134 | struct exynos_drm_gem_obj *exynos_gem_obj; |
1c248b7d ID |
135 | struct drm_device *dev = helper->dev; |
136 | struct fb_info *fbi; | |
a794d57d | 137 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
1c248b7d | 138 | struct platform_device *pdev = dev->platformdev; |
e1533c08 | 139 | unsigned long size; |
1c248b7d ID |
140 | int ret; |
141 | ||
1c248b7d ID |
142 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", |
143 | sizes->surface_width, sizes->surface_height, | |
144 | sizes->surface_bpp); | |
145 | ||
146 | mode_cmd.width = sizes->surface_width; | |
147 | mode_cmd.height = sizes->surface_height; | |
a794d57d JS |
148 | mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); |
149 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
150 | sizes->surface_depth); | |
1c248b7d ID |
151 | |
152 | mutex_lock(&dev->struct_mutex); | |
153 | ||
154 | fbi = framebuffer_alloc(0, &pdev->dev); | |
155 | if (!fbi) { | |
156 | DRM_ERROR("failed to allocate fb info.\n"); | |
157 | ret = -ENOMEM; | |
158 | goto out; | |
159 | } | |
160 | ||
e1533c08 | 161 | size = mode_cmd.pitches[0] * mode_cmd.height; |
2b35892e | 162 | |
a1bfacf4 VS |
163 | exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size); |
164 | /* | |
165 | * If physically contiguous memory allocation fails and if IOMMU is | |
166 | * supported then try to get buffer from non physically contiguous | |
167 | * memory area. | |
168 | */ | |
169 | if (IS_ERR(exynos_gem_obj) && is_drm_iommu_supported(dev)) { | |
170 | dev_warn(&pdev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n"); | |
171 | exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG, | |
172 | size); | |
173 | } | |
174 | ||
e1533c08 JS |
175 | if (IS_ERR(exynos_gem_obj)) { |
176 | ret = PTR_ERR(exynos_gem_obj); | |
662aa6d7 | 177 | goto err_release_framebuffer; |
e1533c08 JS |
178 | } |
179 | ||
180 | exynos_fbdev->exynos_gem_obj = exynos_gem_obj; | |
181 | ||
182 | helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, | |
183 | &exynos_gem_obj->base); | |
41eab402 | 184 | if (IS_ERR(helper->fb)) { |
1c248b7d | 185 | DRM_ERROR("failed to create drm framebuffer.\n"); |
e1533c08 | 186 | ret = PTR_ERR(helper->fb); |
662aa6d7 | 187 | goto err_destroy_gem; |
1c248b7d ID |
188 | } |
189 | ||
1c248b7d ID |
190 | helper->fbdev = fbi; |
191 | ||
192 | fbi->par = helper; | |
193 | fbi->flags = FBINFO_FLAG_DEFAULT; | |
194 | fbi->fbops = &exynos_drm_fb_ops; | |
195 | ||
196 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); | |
197 | if (ret) { | |
198 | DRM_ERROR("failed to allocate cmap.\n"); | |
662aa6d7 | 199 | goto err_destroy_framebuffer; |
1c248b7d ID |
200 | } |
201 | ||
aa6b2b6c | 202 | ret = exynos_drm_fbdev_update(helper, helper->fb); |
662aa6d7 ID |
203 | if (ret < 0) |
204 | goto err_dealloc_cmap; | |
205 | ||
206 | mutex_unlock(&dev->struct_mutex); | |
207 | return ret; | |
208 | ||
209 | err_dealloc_cmap: | |
210 | fb_dealloc_cmap(&fbi->cmap); | |
211 | err_destroy_framebuffer: | |
212 | drm_framebuffer_cleanup(helper->fb); | |
213 | err_destroy_gem: | |
214 | exynos_drm_gem_destroy(exynos_gem_obj); | |
215 | err_release_framebuffer: | |
216 | framebuffer_release(fbi); | |
1c248b7d ID |
217 | |
218 | /* | |
219 | * if failed, all resources allocated above would be released by | |
220 | * drm_mode_config_cleanup() when drm_load() had been called prior | |
221 | * to any specific driver such as fimd or hdmi driver. | |
222 | */ | |
223 | out: | |
224 | mutex_unlock(&dev->struct_mutex); | |
225 | return ret; | |
226 | } | |
227 | ||
3a493879 | 228 | static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { |
cd5428a5 | 229 | .fb_probe = exynos_drm_fbdev_create, |
1c248b7d ID |
230 | }; |
231 | ||
9230ffc4 | 232 | static bool exynos_drm_fbdev_is_anything_connected(struct drm_device *dev) |
3eb578e2 AH |
233 | { |
234 | struct drm_connector *connector; | |
235 | bool ret = false; | |
236 | ||
237 | mutex_lock(&dev->mode_config.mutex); | |
238 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
239 | if (connector->status != connector_status_connected) | |
240 | continue; | |
241 | ||
242 | ret = true; | |
243 | break; | |
244 | } | |
245 | mutex_unlock(&dev->mode_config.mutex); | |
246 | ||
247 | return ret; | |
248 | } | |
249 | ||
1c248b7d ID |
250 | int exynos_drm_fbdev_init(struct drm_device *dev) |
251 | { | |
252 | struct exynos_drm_fbdev *fbdev; | |
253 | struct exynos_drm_private *private = dev->dev_private; | |
254 | struct drm_fb_helper *helper; | |
255 | unsigned int num_crtc; | |
256 | int ret; | |
257 | ||
1c248b7d ID |
258 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) |
259 | return 0; | |
260 | ||
3eb578e2 AH |
261 | if (!exynos_drm_fbdev_is_anything_connected(dev)) |
262 | return 0; | |
263 | ||
1c248b7d | 264 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); |
38bb5253 | 265 | if (!fbdev) |
1c248b7d | 266 | return -ENOMEM; |
1c248b7d ID |
267 | |
268 | private->fb_helper = helper = &fbdev->drm_fb_helper; | |
10a23102 TR |
269 | |
270 | drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs); | |
1c248b7d ID |
271 | |
272 | num_crtc = dev->mode_config.num_crtc; | |
273 | ||
274 | ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); | |
275 | if (ret < 0) { | |
276 | DRM_ERROR("failed to initialize drm fb helper.\n"); | |
277 | goto err_init; | |
278 | } | |
279 | ||
280 | ret = drm_fb_helper_single_add_all_connectors(helper); | |
281 | if (ret < 0) { | |
282 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); | |
283 | goto err_setup; | |
284 | ||
285 | } | |
286 | ||
76a39dbf DV |
287 | /* disable all the possible outputs/crtcs before entering KMS mode */ |
288 | drm_helper_disable_unused_functions(dev); | |
289 | ||
1c248b7d ID |
290 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); |
291 | if (ret < 0) { | |
292 | DRM_ERROR("failed to set up hw configuration.\n"); | |
293 | goto err_setup; | |
294 | } | |
295 | ||
296 | return 0; | |
297 | ||
298 | err_setup: | |
299 | drm_fb_helper_fini(helper); | |
300 | ||
301 | err_init: | |
302 | private->fb_helper = NULL; | |
303 | kfree(fbdev); | |
304 | ||
305 | return ret; | |
306 | } | |
307 | ||
308 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, | |
309 | struct drm_fb_helper *fb_helper) | |
310 | { | |
4744ad24 ID |
311 | struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper); |
312 | struct exynos_drm_gem_obj *exynos_gem_obj = exynos_fbd->exynos_gem_obj; | |
1c248b7d ID |
313 | struct drm_framebuffer *fb; |
314 | ||
c704f1b4 | 315 | if (is_drm_iommu_supported(dev) && exynos_gem_obj->buffer->kvaddr) |
4744ad24 ID |
316 | vunmap(exynos_gem_obj->buffer->kvaddr); |
317 | ||
1c248b7d ID |
318 | /* release drm framebuffer and real buffer */ |
319 | if (fb_helper->fb && fb_helper->fb->funcs) { | |
320 | fb = fb_helper->fb; | |
36206361 DV |
321 | if (fb) { |
322 | drm_framebuffer_unregister_private(fb); | |
f7eff60e | 323 | drm_framebuffer_remove(fb); |
36206361 | 324 | } |
1c248b7d ID |
325 | } |
326 | ||
327 | /* release linux framebuffer */ | |
328 | if (fb_helper->fbdev) { | |
329 | struct fb_info *info; | |
330 | int ret; | |
331 | ||
332 | info = fb_helper->fbdev; | |
333 | ret = unregister_framebuffer(info); | |
334 | if (ret < 0) | |
335 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); | |
336 | ||
337 | if (info->cmap.len) | |
338 | fb_dealloc_cmap(&info->cmap); | |
339 | ||
340 | framebuffer_release(info); | |
341 | } | |
342 | ||
343 | drm_fb_helper_fini(fb_helper); | |
344 | } | |
345 | ||
346 | void exynos_drm_fbdev_fini(struct drm_device *dev) | |
347 | { | |
348 | struct exynos_drm_private *private = dev->dev_private; | |
349 | struct exynos_drm_fbdev *fbdev; | |
350 | ||
351 | if (!private || !private->fb_helper) | |
352 | return; | |
353 | ||
354 | fbdev = to_exynos_fbdev(private->fb_helper); | |
355 | ||
e1533c08 JS |
356 | if (fbdev->exynos_gem_obj) |
357 | exynos_drm_gem_destroy(fbdev->exynos_gem_obj); | |
358 | ||
1c248b7d ID |
359 | exynos_drm_fbdev_destroy(dev, private->fb_helper); |
360 | kfree(fbdev); | |
361 | private->fb_helper = NULL; | |
362 | } | |
363 | ||
364 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) | |
365 | { | |
366 | struct exynos_drm_private *private = dev->dev_private; | |
367 | ||
368 | if (!private || !private->fb_helper) | |
369 | return; | |
370 | ||
5ea1f752 | 371 | drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper); |
1c248b7d | 372 | } |