Merge branch '3.2-without-smb2' of git://git.samba.org/sfrench/cifs-2.6
[pandora-kernel.git] / drivers / gpu / drm / exynos / exynos_drm_fb.c
1 /* exynos_drm_fb.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_crtc_helper.h"
32
33 #include "exynos_drm_fb.h"
34 #include "exynos_drm_buf.h"
35 #include "exynos_drm_gem.h"
36
37 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
38
39 /*
40  * exynos specific framebuffer structure.
41  *
42  * @fb: drm framebuffer obejct.
43  * @exynos_gem_obj: exynos specific gem object containing a gem object.
44  * @entry: pointer to exynos drm buffer entry object.
45  *      - containing only the information to physically continuous memory
46  *      region allocated at default framebuffer creation.
47  */
48 struct exynos_drm_fb {
49         struct drm_framebuffer          fb;
50         struct exynos_drm_gem_obj       *exynos_gem_obj;
51         struct exynos_drm_buf_entry     *entry;
52 };
53
54 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
55 {
56         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
57
58         DRM_DEBUG_KMS("%s\n", __FILE__);
59
60         drm_framebuffer_cleanup(fb);
61
62         /*
63          * default framebuffer has no gem object so
64          * a buffer of the default framebuffer should be released at here.
65          */
66         if (!exynos_fb->exynos_gem_obj && exynos_fb->entry)
67                 exynos_drm_buf_destroy(fb->dev, exynos_fb->entry);
68
69         kfree(exynos_fb);
70         exynos_fb = NULL;
71 }
72
73 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
74                                         struct drm_file *file_priv,
75                                         unsigned int *handle)
76 {
77         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
78
79         DRM_DEBUG_KMS("%s\n", __FILE__);
80
81         return drm_gem_handle_create(file_priv,
82                         &exynos_fb->exynos_gem_obj->base, handle);
83 }
84
85 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
86                                 struct drm_file *file_priv, unsigned flags,
87                                 unsigned color, struct drm_clip_rect *clips,
88                                 unsigned num_clips)
89 {
90         DRM_DEBUG_KMS("%s\n", __FILE__);
91
92         /* TODO */
93
94         return 0;
95 }
96
97 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
98         .destroy        = exynos_drm_fb_destroy,
99         .create_handle  = exynos_drm_fb_create_handle,
100         .dirty          = exynos_drm_fb_dirty,
101 };
102
103 static struct drm_framebuffer *
104 exynos_drm_fb_init(struct drm_file *file_priv, struct drm_device *dev,
105                     struct drm_mode_fb_cmd *mode_cmd)
106 {
107         struct exynos_drm_fb *exynos_fb;
108         struct drm_framebuffer *fb;
109         struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
110         struct drm_gem_object *obj;
111         unsigned int size;
112         int ret;
113
114         DRM_DEBUG_KMS("%s\n", __FILE__);
115
116         mode_cmd->pitch = max(mode_cmd->pitch,
117                         mode_cmd->width * (mode_cmd->bpp >> 3));
118
119         DRM_LOG_KMS("drm fb create(%dx%d)\n",
120                         mode_cmd->width, mode_cmd->height);
121
122         exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
123         if (!exynos_fb) {
124                 DRM_ERROR("failed to allocate exynos drm framebuffer.\n");
125                 return ERR_PTR(-ENOMEM);
126         }
127
128         fb = &exynos_fb->fb;
129         ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
130         if (ret) {
131                 DRM_ERROR("failed to initialize framebuffer.\n");
132                 goto err_init;
133         }
134
135         DRM_LOG_KMS("create: fb id: %d\n", fb->base.id);
136
137         size = mode_cmd->pitch * mode_cmd->height;
138
139         /*
140          * mode_cmd->handle could be NULL at booting time or
141          * with user request. if NULL, a new buffer or a gem object
142          * would be allocated.
143          */
144         if (!mode_cmd->handle) {
145                 if (!file_priv) {
146                         struct exynos_drm_buf_entry *entry;
147
148                         /*
149                          * in case that file_priv is NULL, it allocates
150                          * only buffer and this buffer would be used
151                          * for default framebuffer.
152                          */
153                         entry = exynos_drm_buf_create(dev, size);
154                         if (IS_ERR(entry)) {
155                                 ret = PTR_ERR(entry);
156                                 goto err_buffer;
157                         }
158
159                         exynos_fb->entry = entry;
160
161                         DRM_LOG_KMS("default fb: paddr = 0x%lx, size = 0x%x\n",
162                                         (unsigned long)entry->paddr, size);
163
164                         goto out;
165                 } else {
166                         exynos_gem_obj = exynos_drm_gem_create(file_priv, dev,
167                                                         size,
168                                                         &mode_cmd->handle);
169                         if (IS_ERR(exynos_gem_obj)) {
170                                 ret = PTR_ERR(exynos_gem_obj);
171                                 goto err_buffer;
172                         }
173                 }
174         } else {
175                 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
176                 if (!obj) {
177                         DRM_ERROR("failed to lookup gem object.\n");
178                         goto err_buffer;
179                 }
180
181                 exynos_gem_obj = to_exynos_gem_obj(obj);
182
183                 drm_gem_object_unreference_unlocked(obj);
184         }
185
186         /*
187          * if got a exynos_gem_obj from either a handle or
188          * a new creation then exynos_fb->exynos_gem_obj is NULL
189          * so that default framebuffer has no its own gem object,
190          * only its own buffer object.
191          */
192         exynos_fb->entry = exynos_gem_obj->entry;
193
194         DRM_LOG_KMS("paddr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
195                         (unsigned long)exynos_fb->entry->paddr, size,
196                         (unsigned int)&exynos_gem_obj->base);
197
198 out:
199         exynos_fb->exynos_gem_obj = exynos_gem_obj;
200
201         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
202
203         return fb;
204
205 err_buffer:
206         drm_framebuffer_cleanup(fb);
207
208 err_init:
209         kfree(exynos_fb);
210
211         return ERR_PTR(ret);
212 }
213
214 struct drm_framebuffer *exynos_drm_fb_create(struct drm_device *dev,
215                                               struct drm_file *file_priv,
216                                               struct drm_mode_fb_cmd *mode_cmd)
217 {
218         DRM_DEBUG_KMS("%s\n", __FILE__);
219
220         return exynos_drm_fb_init(file_priv, dev, mode_cmd);
221 }
222
223 struct exynos_drm_buf_entry *exynos_drm_fb_get_buf(struct drm_framebuffer *fb)
224 {
225         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
226         struct exynos_drm_buf_entry *entry;
227
228         DRM_DEBUG_KMS("%s\n", __FILE__);
229
230         entry = exynos_fb->entry;
231         if (!entry)
232                 return NULL;
233
234         DRM_DEBUG_KMS("vaddr = 0x%lx, paddr = 0x%lx\n",
235                         (unsigned long)entry->vaddr,
236                         (unsigned long)entry->paddr);
237
238         return entry;
239 }
240
241 static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
242         .fb_create = exynos_drm_fb_create,
243 };
244
245 void exynos_drm_mode_config_init(struct drm_device *dev)
246 {
247         dev->mode_config.min_width = 0;
248         dev->mode_config.min_height = 0;
249
250         /*
251          * set max width and height as default value(4096x4096).
252          * this value would be used to check framebuffer size limitation
253          * at drm_mode_addfb().
254          */
255         dev->mode_config.max_width = 4096;
256         dev->mode_config.max_height = 4096;
257
258         dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
259 }
260
261 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
262 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
263 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
264 MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
265 MODULE_LICENSE("GPL");