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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 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice (including the next | |
17 | * paragraph) shall be included in all copies or substantial portions of the | |
18 | * Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
23 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
26 | * OTHER DEALINGS IN THE SOFTWARE. | |
27 | */ | |
28 | ||
29 | #include "drmP.h" | |
30 | #include "drm_crtc.h" | |
31 | #include "drm_fb_helper.h" | |
32 | #include "drm_crtc_helper.h" | |
33 | ||
34 | #include "exynos_drm_drv.h" | |
35 | #include "exynos_drm_fb.h" | |
2c871127 | 36 | #include "exynos_drm_gem.h" |
1c248b7d ID |
37 | |
38 | #define MAX_CONNECTOR 4 | |
39 | #define PREFERRED_BPP 32 | |
40 | ||
41 | #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\ | |
42 | drm_fb_helper) | |
43 | ||
44 | struct exynos_drm_fbdev { | |
e1533c08 JS |
45 | struct drm_fb_helper drm_fb_helper; |
46 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
1c248b7d ID |
47 | }; |
48 | ||
1c248b7d ID |
49 | static struct fb_ops exynos_drm_fb_ops = { |
50 | .owner = THIS_MODULE, | |
51 | .fb_fillrect = cfb_fillrect, | |
52 | .fb_copyarea = cfb_copyarea, | |
53 | .fb_imageblit = cfb_imageblit, | |
54 | .fb_check_var = drm_fb_helper_check_var, | |
34418c25 | 55 | .fb_set_par = drm_fb_helper_set_par, |
1c248b7d ID |
56 | .fb_blank = drm_fb_helper_blank, |
57 | .fb_pan_display = drm_fb_helper_pan_display, | |
58 | .fb_setcmap = drm_fb_helper_setcmap, | |
59 | }; | |
60 | ||
19c8b834 | 61 | static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, |
aa6b2b6c | 62 | struct drm_framebuffer *fb) |
1c248b7d ID |
63 | { |
64 | struct fb_info *fbi = helper->fbdev; | |
65 | struct drm_device *dev = helper->dev; | |
2c871127 | 66 | struct exynos_drm_gem_buf *buffer; |
aa6b2b6c | 67 | unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3); |
19c8b834 | 68 | unsigned long offset; |
1c248b7d ID |
69 | |
70 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
71 | ||
01f2c773 | 72 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); |
aa6b2b6c | 73 | drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height); |
1c248b7d | 74 | |
229d3534 SWK |
75 | /* RGB formats use only one buffer */ |
76 | buffer = exynos_drm_fb_buffer(fb, 0); | |
2c871127 ID |
77 | if (!buffer) { |
78 | DRM_LOG_KMS("buffer is null.\n"); | |
19c8b834 ID |
79 | return -EFAULT; |
80 | } | |
1c248b7d | 81 | |
19c8b834 | 82 | offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3); |
01f2c773 | 83 | offset += fbi->var.yoffset * fb->pitches[0]; |
1c248b7d | 84 | |
2c871127 ID |
85 | dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr; |
86 | fbi->screen_base = buffer->kvaddr + offset; | |
87 | fbi->fix.smem_start = (unsigned long)(buffer->dma_addr + offset); | |
1c248b7d | 88 | fbi->screen_size = size; |
1c248b7d | 89 | fbi->fix.smem_len = size; |
19c8b834 ID |
90 | |
91 | return 0; | |
1c248b7d ID |
92 | } |
93 | ||
94 | static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, | |
95 | struct drm_fb_helper_surface_size *sizes) | |
96 | { | |
97 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); | |
e1533c08 | 98 | struct exynos_drm_gem_obj *exynos_gem_obj; |
1c248b7d ID |
99 | struct drm_device *dev = helper->dev; |
100 | struct fb_info *fbi; | |
a794d57d | 101 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
1c248b7d | 102 | struct platform_device *pdev = dev->platformdev; |
e1533c08 | 103 | unsigned long size; |
1c248b7d ID |
104 | int ret; |
105 | ||
106 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
107 | ||
108 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", | |
109 | sizes->surface_width, sizes->surface_height, | |
110 | sizes->surface_bpp); | |
111 | ||
112 | mode_cmd.width = sizes->surface_width; | |
113 | mode_cmd.height = sizes->surface_height; | |
a794d57d JS |
114 | mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); |
115 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
116 | sizes->surface_depth); | |
1c248b7d ID |
117 | |
118 | mutex_lock(&dev->struct_mutex); | |
119 | ||
120 | fbi = framebuffer_alloc(0, &pdev->dev); | |
121 | if (!fbi) { | |
122 | DRM_ERROR("failed to allocate fb info.\n"); | |
123 | ret = -ENOMEM; | |
124 | goto out; | |
125 | } | |
126 | ||
e1533c08 JS |
127 | size = mode_cmd.pitches[0] * mode_cmd.height; |
128 | exynos_gem_obj = exynos_drm_gem_create(dev, size); | |
129 | if (IS_ERR(exynos_gem_obj)) { | |
130 | ret = PTR_ERR(exynos_gem_obj); | |
131 | goto out; | |
132 | } | |
133 | ||
134 | exynos_fbdev->exynos_gem_obj = exynos_gem_obj; | |
135 | ||
136 | helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, | |
137 | &exynos_gem_obj->base); | |
138 | if (IS_ERR_OR_NULL(helper->fb)) { | |
1c248b7d | 139 | DRM_ERROR("failed to create drm framebuffer.\n"); |
e1533c08 | 140 | ret = PTR_ERR(helper->fb); |
1c248b7d ID |
141 | goto out; |
142 | } | |
143 | ||
1c248b7d ID |
144 | helper->fbdev = fbi; |
145 | ||
146 | fbi->par = helper; | |
147 | fbi->flags = FBINFO_FLAG_DEFAULT; | |
148 | fbi->fbops = &exynos_drm_fb_ops; | |
149 | ||
150 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); | |
151 | if (ret) { | |
152 | DRM_ERROR("failed to allocate cmap.\n"); | |
153 | goto out; | |
154 | } | |
155 | ||
aa6b2b6c | 156 | ret = exynos_drm_fbdev_update(helper, helper->fb); |
e1533c08 | 157 | if (ret < 0) { |
19c8b834 | 158 | fb_dealloc_cmap(&fbi->cmap); |
e1533c08 JS |
159 | goto out; |
160 | } | |
1c248b7d ID |
161 | |
162 | /* | |
163 | * if failed, all resources allocated above would be released by | |
164 | * drm_mode_config_cleanup() when drm_load() had been called prior | |
165 | * to any specific driver such as fimd or hdmi driver. | |
166 | */ | |
167 | out: | |
168 | mutex_unlock(&dev->struct_mutex); | |
169 | return ret; | |
170 | } | |
171 | ||
1c248b7d ID |
172 | static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper, |
173 | struct drm_fb_helper_surface_size *sizes) | |
174 | { | |
175 | int ret = 0; | |
176 | ||
177 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
178 | ||
bc41eae2 ID |
179 | /* |
180 | * with !helper->fb, it means that this funcion is called first time | |
181 | * and after that, the helper->fb would be used as clone mode. | |
182 | */ | |
1c248b7d ID |
183 | if (!helper->fb) { |
184 | ret = exynos_drm_fbdev_create(helper, sizes); | |
185 | if (ret < 0) { | |
186 | DRM_ERROR("failed to create fbdev.\n"); | |
187 | return ret; | |
188 | } | |
189 | ||
190 | /* | |
191 | * fb_helper expects a value more than 1 if succeed | |
192 | * because register_framebuffer() should be called. | |
193 | */ | |
194 | ret = 1; | |
1c248b7d ID |
195 | } |
196 | ||
197 | return ret; | |
198 | } | |
199 | ||
200 | static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { | |
201 | .fb_probe = exynos_drm_fbdev_probe, | |
202 | }; | |
203 | ||
204 | int exynos_drm_fbdev_init(struct drm_device *dev) | |
205 | { | |
206 | struct exynos_drm_fbdev *fbdev; | |
207 | struct exynos_drm_private *private = dev->dev_private; | |
208 | struct drm_fb_helper *helper; | |
209 | unsigned int num_crtc; | |
210 | int ret; | |
211 | ||
212 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
213 | ||
214 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) | |
215 | return 0; | |
216 | ||
217 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); | |
218 | if (!fbdev) { | |
219 | DRM_ERROR("failed to allocate drm fbdev.\n"); | |
220 | return -ENOMEM; | |
221 | } | |
222 | ||
223 | private->fb_helper = helper = &fbdev->drm_fb_helper; | |
224 | helper->funcs = &exynos_drm_fb_helper_funcs; | |
225 | ||
226 | num_crtc = dev->mode_config.num_crtc; | |
227 | ||
228 | ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); | |
229 | if (ret < 0) { | |
230 | DRM_ERROR("failed to initialize drm fb helper.\n"); | |
231 | goto err_init; | |
232 | } | |
233 | ||
234 | ret = drm_fb_helper_single_add_all_connectors(helper); | |
235 | if (ret < 0) { | |
236 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); | |
237 | goto err_setup; | |
238 | ||
239 | } | |
240 | ||
241 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); | |
242 | if (ret < 0) { | |
243 | DRM_ERROR("failed to set up hw configuration.\n"); | |
244 | goto err_setup; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | ||
249 | err_setup: | |
250 | drm_fb_helper_fini(helper); | |
251 | ||
252 | err_init: | |
253 | private->fb_helper = NULL; | |
254 | kfree(fbdev); | |
255 | ||
256 | return ret; | |
257 | } | |
258 | ||
259 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, | |
260 | struct drm_fb_helper *fb_helper) | |
261 | { | |
262 | struct drm_framebuffer *fb; | |
263 | ||
264 | /* release drm framebuffer and real buffer */ | |
265 | if (fb_helper->fb && fb_helper->fb->funcs) { | |
266 | fb = fb_helper->fb; | |
267 | if (fb && fb->funcs->destroy) | |
268 | fb->funcs->destroy(fb); | |
269 | } | |
270 | ||
271 | /* release linux framebuffer */ | |
272 | if (fb_helper->fbdev) { | |
273 | struct fb_info *info; | |
274 | int ret; | |
275 | ||
276 | info = fb_helper->fbdev; | |
277 | ret = unregister_framebuffer(info); | |
278 | if (ret < 0) | |
279 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); | |
280 | ||
281 | if (info->cmap.len) | |
282 | fb_dealloc_cmap(&info->cmap); | |
283 | ||
284 | framebuffer_release(info); | |
285 | } | |
286 | ||
287 | drm_fb_helper_fini(fb_helper); | |
288 | } | |
289 | ||
290 | void exynos_drm_fbdev_fini(struct drm_device *dev) | |
291 | { | |
292 | struct exynos_drm_private *private = dev->dev_private; | |
293 | struct exynos_drm_fbdev *fbdev; | |
294 | ||
295 | if (!private || !private->fb_helper) | |
296 | return; | |
297 | ||
298 | fbdev = to_exynos_fbdev(private->fb_helper); | |
299 | ||
e1533c08 JS |
300 | if (fbdev->exynos_gem_obj) |
301 | exynos_drm_gem_destroy(fbdev->exynos_gem_obj); | |
302 | ||
1c248b7d ID |
303 | exynos_drm_fbdev_destroy(dev, private->fb_helper); |
304 | kfree(fbdev); | |
305 | private->fb_helper = NULL; | |
306 | } | |
307 | ||
308 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) | |
309 | { | |
310 | struct exynos_drm_private *private = dev->dev_private; | |
311 | ||
312 | if (!private || !private->fb_helper) | |
313 | return; | |
314 | ||
315 | drm_fb_helper_restore_fbdev_mode(private->fb_helper); | |
316 | } | |
317 | ||
318 | int exynos_drm_fbdev_reinit(struct drm_device *dev) | |
319 | { | |
320 | struct exynos_drm_private *private = dev->dev_private; | |
321 | struct drm_fb_helper *fb_helper; | |
322 | int ret; | |
323 | ||
324 | if (!private) | |
325 | return -EINVAL; | |
326 | ||
f6b98252 ID |
327 | /* |
328 | * if all sub drivers were unloaded then num_connector is 0 | |
329 | * so at this time, the framebuffers also should be destroyed. | |
330 | */ | |
1c248b7d ID |
331 | if (!dev->mode_config.num_connector) { |
332 | exynos_drm_fbdev_fini(dev); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | fb_helper = private->fb_helper; | |
337 | ||
338 | if (fb_helper) { | |
84b46990 JS |
339 | struct list_head temp_list; |
340 | ||
341 | INIT_LIST_HEAD(&temp_list); | |
342 | ||
343 | /* | |
344 | * fb_helper is reintialized but kernel fb is reused | |
345 | * so kernel_fb_list need to be backuped and restored | |
346 | */ | |
347 | if (!list_empty(&fb_helper->kernel_fb_list)) | |
348 | list_replace_init(&fb_helper->kernel_fb_list, | |
349 | &temp_list); | |
350 | ||
1c248b7d ID |
351 | drm_fb_helper_fini(fb_helper); |
352 | ||
353 | ret = drm_fb_helper_init(dev, fb_helper, | |
354 | dev->mode_config.num_crtc, MAX_CONNECTOR); | |
355 | if (ret < 0) { | |
356 | DRM_ERROR("failed to initialize drm fb helper\n"); | |
357 | return ret; | |
358 | } | |
359 | ||
84b46990 JS |
360 | if (!list_empty(&temp_list)) |
361 | list_replace(&temp_list, &fb_helper->kernel_fb_list); | |
362 | ||
1c248b7d ID |
363 | ret = drm_fb_helper_single_add_all_connectors(fb_helper); |
364 | if (ret < 0) { | |
365 | DRM_ERROR("failed to add fb helper to connectors\n"); | |
366 | goto err; | |
367 | } | |
368 | ||
369 | ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP); | |
370 | if (ret < 0) { | |
371 | DRM_ERROR("failed to set up hw configuration.\n"); | |
372 | goto err; | |
373 | } | |
374 | } else { | |
375 | /* | |
376 | * if drm_load() failed whem drm load() was called prior | |
377 | * to specific drivers, fb_helper must be NULL and so | |
378 | * this fuction should be called again to re-initialize and | |
379 | * re-configure the fb helper. it means that this function | |
380 | * has been called by the specific drivers. | |
381 | */ | |
f6b98252 | 382 | ret = exynos_drm_fbdev_init(dev); |
1c248b7d ID |
383 | } |
384 | ||
601b44e3 ID |
385 | return ret; |
386 | ||
1c248b7d ID |
387 | err: |
388 | /* | |
389 | * if drm_load() failed when drm load() was called prior | |
390 | * to specific drivers, the fb_helper must be NULL and so check it. | |
391 | */ | |
392 | if (fb_helper) | |
393 | drm_fb_helper_fini(fb_helper); | |
394 | ||
395 | return ret; | |
396 | } | |
397 | ||
398 | MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); | |
399 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | |
400 | MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); | |
401 | MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver"); | |
402 | MODULE_LICENSE("GPL"); |