Commit | Line | Data |
---|---|---|
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; |
71b1f195 | 126 | fbi->fix.smem_len = size; |
19c8b834 ID |
127 | |
128 | return 0; | |
1c248b7d ID |
129 | } |
130 | ||
131 | static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, | |
132 | struct drm_fb_helper_surface_size *sizes) | |
133 | { | |
134 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); | |
e1533c08 | 135 | struct exynos_drm_gem_obj *exynos_gem_obj; |
1c248b7d ID |
136 | struct drm_device *dev = helper->dev; |
137 | struct fb_info *fbi; | |
a794d57d | 138 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
1c248b7d | 139 | struct platform_device *pdev = dev->platformdev; |
e1533c08 | 140 | unsigned long size; |
1c248b7d ID |
141 | int ret; |
142 | ||
1c248b7d ID |
143 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", |
144 | sizes->surface_width, sizes->surface_height, | |
145 | sizes->surface_bpp); | |
146 | ||
147 | mode_cmd.width = sizes->surface_width; | |
148 | mode_cmd.height = sizes->surface_height; | |
a794d57d JS |
149 | mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); |
150 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
151 | sizes->surface_depth); | |
1c248b7d ID |
152 | |
153 | mutex_lock(&dev->struct_mutex); | |
154 | ||
155 | fbi = framebuffer_alloc(0, &pdev->dev); | |
156 | if (!fbi) { | |
157 | DRM_ERROR("failed to allocate fb info.\n"); | |
158 | ret = -ENOMEM; | |
159 | goto out; | |
160 | } | |
161 | ||
e1533c08 | 162 | size = mode_cmd.pitches[0] * mode_cmd.height; |
2b35892e | 163 | |
a1bfacf4 VS |
164 | exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size); |
165 | /* | |
166 | * If physically contiguous memory allocation fails and if IOMMU is | |
167 | * supported then try to get buffer from non physically contiguous | |
168 | * memory area. | |
169 | */ | |
170 | if (IS_ERR(exynos_gem_obj) && is_drm_iommu_supported(dev)) { | |
171 | dev_warn(&pdev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n"); | |
172 | exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG, | |
173 | size); | |
174 | } | |
175 | ||
e1533c08 JS |
176 | if (IS_ERR(exynos_gem_obj)) { |
177 | ret = PTR_ERR(exynos_gem_obj); | |
662aa6d7 | 178 | goto err_release_framebuffer; |
e1533c08 JS |
179 | } |
180 | ||
181 | exynos_fbdev->exynos_gem_obj = exynos_gem_obj; | |
182 | ||
183 | helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, | |
184 | &exynos_gem_obj->base); | |
41eab402 | 185 | if (IS_ERR(helper->fb)) { |
1c248b7d | 186 | DRM_ERROR("failed to create drm framebuffer.\n"); |
e1533c08 | 187 | ret = PTR_ERR(helper->fb); |
662aa6d7 | 188 | goto err_destroy_gem; |
1c248b7d ID |
189 | } |
190 | ||
1c248b7d ID |
191 | helper->fbdev = fbi; |
192 | ||
193 | fbi->par = helper; | |
194 | fbi->flags = FBINFO_FLAG_DEFAULT; | |
195 | fbi->fbops = &exynos_drm_fb_ops; | |
196 | ||
197 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); | |
198 | if (ret) { | |
199 | DRM_ERROR("failed to allocate cmap.\n"); | |
662aa6d7 | 200 | goto err_destroy_framebuffer; |
1c248b7d ID |
201 | } |
202 | ||
aa6b2b6c | 203 | ret = exynos_drm_fbdev_update(helper, helper->fb); |
662aa6d7 ID |
204 | if (ret < 0) |
205 | goto err_dealloc_cmap; | |
206 | ||
207 | mutex_unlock(&dev->struct_mutex); | |
208 | return ret; | |
209 | ||
210 | err_dealloc_cmap: | |
211 | fb_dealloc_cmap(&fbi->cmap); | |
212 | err_destroy_framebuffer: | |
213 | drm_framebuffer_cleanup(helper->fb); | |
214 | err_destroy_gem: | |
215 | exynos_drm_gem_destroy(exynos_gem_obj); | |
216 | err_release_framebuffer: | |
217 | framebuffer_release(fbi); | |
1c248b7d ID |
218 | |
219 | /* | |
220 | * if failed, all resources allocated above would be released by | |
221 | * drm_mode_config_cleanup() when drm_load() had been called prior | |
222 | * to any specific driver such as fimd or hdmi driver. | |
223 | */ | |
224 | out: | |
225 | mutex_unlock(&dev->struct_mutex); | |
226 | return ret; | |
227 | } | |
228 | ||
3a493879 | 229 | static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { |
cd5428a5 | 230 | .fb_probe = exynos_drm_fbdev_create, |
1c248b7d ID |
231 | }; |
232 | ||
9230ffc4 | 233 | static bool exynos_drm_fbdev_is_anything_connected(struct drm_device *dev) |
3eb578e2 AH |
234 | { |
235 | struct drm_connector *connector; | |
236 | bool ret = false; | |
237 | ||
238 | mutex_lock(&dev->mode_config.mutex); | |
239 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
240 | if (connector->status != connector_status_connected) | |
241 | continue; | |
242 | ||
243 | ret = true; | |
244 | break; | |
245 | } | |
246 | mutex_unlock(&dev->mode_config.mutex); | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
1c248b7d ID |
251 | int exynos_drm_fbdev_init(struct drm_device *dev) |
252 | { | |
253 | struct exynos_drm_fbdev *fbdev; | |
254 | struct exynos_drm_private *private = dev->dev_private; | |
255 | struct drm_fb_helper *helper; | |
256 | unsigned int num_crtc; | |
257 | int ret; | |
258 | ||
1c248b7d ID |
259 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) |
260 | return 0; | |
261 | ||
3eb578e2 AH |
262 | if (!exynos_drm_fbdev_is_anything_connected(dev)) |
263 | return 0; | |
264 | ||
1c248b7d | 265 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); |
38bb5253 | 266 | if (!fbdev) |
1c248b7d | 267 | return -ENOMEM; |
1c248b7d ID |
268 | |
269 | private->fb_helper = helper = &fbdev->drm_fb_helper; | |
10a23102 TR |
270 | |
271 | drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs); | |
1c248b7d ID |
272 | |
273 | num_crtc = dev->mode_config.num_crtc; | |
274 | ||
275 | ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); | |
276 | if (ret < 0) { | |
277 | DRM_ERROR("failed to initialize drm fb helper.\n"); | |
278 | goto err_init; | |
279 | } | |
280 | ||
281 | ret = drm_fb_helper_single_add_all_connectors(helper); | |
282 | if (ret < 0) { | |
283 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); | |
284 | goto err_setup; | |
285 | ||
286 | } | |
287 | ||
76a39dbf DV |
288 | /* disable all the possible outputs/crtcs before entering KMS mode */ |
289 | drm_helper_disable_unused_functions(dev); | |
290 | ||
1c248b7d ID |
291 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); |
292 | if (ret < 0) { | |
293 | DRM_ERROR("failed to set up hw configuration.\n"); | |
294 | goto err_setup; | |
295 | } | |
296 | ||
297 | return 0; | |
298 | ||
299 | err_setup: | |
300 | drm_fb_helper_fini(helper); | |
301 | ||
302 | err_init: | |
303 | private->fb_helper = NULL; | |
304 | kfree(fbdev); | |
305 | ||
306 | return ret; | |
307 | } | |
308 | ||
309 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, | |
310 | struct drm_fb_helper *fb_helper) | |
311 | { | |
4744ad24 ID |
312 | struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper); |
313 | struct exynos_drm_gem_obj *exynos_gem_obj = exynos_fbd->exynos_gem_obj; | |
1c248b7d ID |
314 | struct drm_framebuffer *fb; |
315 | ||
c704f1b4 | 316 | if (is_drm_iommu_supported(dev) && exynos_gem_obj->buffer->kvaddr) |
4744ad24 ID |
317 | vunmap(exynos_gem_obj->buffer->kvaddr); |
318 | ||
1c248b7d ID |
319 | /* release drm framebuffer and real buffer */ |
320 | if (fb_helper->fb && fb_helper->fb->funcs) { | |
321 | fb = fb_helper->fb; | |
36206361 DV |
322 | if (fb) { |
323 | drm_framebuffer_unregister_private(fb); | |
f7eff60e | 324 | drm_framebuffer_remove(fb); |
36206361 | 325 | } |
1c248b7d ID |
326 | } |
327 | ||
328 | /* release linux framebuffer */ | |
329 | if (fb_helper->fbdev) { | |
330 | struct fb_info *info; | |
331 | int ret; | |
332 | ||
333 | info = fb_helper->fbdev; | |
334 | ret = unregister_framebuffer(info); | |
335 | if (ret < 0) | |
336 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); | |
337 | ||
338 | if (info->cmap.len) | |
339 | fb_dealloc_cmap(&info->cmap); | |
340 | ||
341 | framebuffer_release(info); | |
342 | } | |
343 | ||
344 | drm_fb_helper_fini(fb_helper); | |
345 | } | |
346 | ||
347 | void exynos_drm_fbdev_fini(struct drm_device *dev) | |
348 | { | |
349 | struct exynos_drm_private *private = dev->dev_private; | |
350 | struct exynos_drm_fbdev *fbdev; | |
351 | ||
352 | if (!private || !private->fb_helper) | |
353 | return; | |
354 | ||
355 | fbdev = to_exynos_fbdev(private->fb_helper); | |
356 | ||
357 | exynos_drm_fbdev_destroy(dev, private->fb_helper); | |
358 | kfree(fbdev); | |
359 | private->fb_helper = NULL; | |
360 | } | |
361 | ||
362 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) | |
363 | { | |
364 | struct exynos_drm_private *private = dev->dev_private; | |
365 | ||
366 | if (!private || !private->fb_helper) | |
367 | return; | |
368 | ||
5ea1f752 | 369 | drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper); |
1c248b7d | 370 | } |