Merge tag 'ep93xx-fixes-for-3.6' of git://github.com/RyanMallon/linux-ep93xx into...
[linux.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 #include "drm_fb_helper.h"
33
34 #include "exynos_drm_drv.h"
35 #include "exynos_drm_fb.h"
36 #include "exynos_drm_gem.h"
37
38 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
39
40 /*
41  * exynos specific framebuffer structure.
42  *
43  * @fb: drm framebuffer obejct.
44  * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
45  */
46 struct exynos_drm_fb {
47         struct drm_framebuffer          fb;
48         struct exynos_drm_gem_obj       *exynos_gem_obj[MAX_FB_BUFFER];
49 };
50
51 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
52 {
53         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
54         unsigned int i;
55
56         DRM_DEBUG_KMS("%s\n", __FILE__);
57
58         drm_framebuffer_cleanup(fb);
59
60         for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
61                 struct drm_gem_object *obj;
62
63                 if (exynos_fb->exynos_gem_obj[i] == NULL)
64                         continue;
65
66                 obj = &exynos_fb->exynos_gem_obj[i]->base;
67                 drm_gem_object_unreference_unlocked(obj);
68         }
69
70         kfree(exynos_fb);
71         exynos_fb = NULL;
72 }
73
74 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
75                                         struct drm_file *file_priv,
76                                         unsigned int *handle)
77 {
78         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
79
80         DRM_DEBUG_KMS("%s\n", __FILE__);
81
82         return drm_gem_handle_create(file_priv,
83                         &exynos_fb->exynos_gem_obj[0]->base, handle);
84 }
85
86 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
87                                 struct drm_file *file_priv, unsigned flags,
88                                 unsigned color, struct drm_clip_rect *clips,
89                                 unsigned num_clips)
90 {
91         DRM_DEBUG_KMS("%s\n", __FILE__);
92
93         /* TODO */
94
95         return 0;
96 }
97
98 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
99         .destroy        = exynos_drm_fb_destroy,
100         .create_handle  = exynos_drm_fb_create_handle,
101         .dirty          = exynos_drm_fb_dirty,
102 };
103
104 struct drm_framebuffer *
105 exynos_drm_framebuffer_init(struct drm_device *dev,
106                             struct drm_mode_fb_cmd2 *mode_cmd,
107                             struct drm_gem_object *obj)
108 {
109         struct exynos_drm_fb *exynos_fb;
110         int ret;
111
112         exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
113         if (!exynos_fb) {
114                 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
115                 return ERR_PTR(-ENOMEM);
116         }
117
118         ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
119         if (ret) {
120                 DRM_ERROR("failed to initialize framebuffer\n");
121                 return ERR_PTR(ret);
122         }
123
124         drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
125         exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
126
127         return &exynos_fb->fb;
128 }
129
130 static struct drm_framebuffer *
131 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
132                       struct drm_mode_fb_cmd2 *mode_cmd)
133 {
134         struct drm_gem_object *obj;
135         struct drm_framebuffer *fb;
136         struct exynos_drm_fb *exynos_fb;
137         int nr;
138         int i;
139
140         DRM_DEBUG_KMS("%s\n", __FILE__);
141
142         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
143         if (!obj) {
144                 DRM_ERROR("failed to lookup gem object\n");
145                 return ERR_PTR(-ENOENT);
146         }
147
148         fb = exynos_drm_framebuffer_init(dev, mode_cmd, obj);
149         if (IS_ERR(fb)) {
150                 drm_gem_object_unreference_unlocked(obj);
151                 return fb;
152         }
153
154         exynos_fb = to_exynos_fb(fb);
155         nr = exynos_drm_format_num_buffers(fb->pixel_format);
156
157         for (i = 1; i < nr; i++) {
158                 obj = drm_gem_object_lookup(dev, file_priv,
159                                 mode_cmd->handles[i]);
160                 if (!obj) {
161                         DRM_ERROR("failed to lookup gem object\n");
162                         exynos_drm_fb_destroy(fb);
163                         return ERR_PTR(-ENOENT);
164                 }
165
166                 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj);
167         }
168
169         return fb;
170 }
171
172 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
173                                                 int index)
174 {
175         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
176         struct exynos_drm_gem_buf *buffer;
177
178         DRM_DEBUG_KMS("%s\n", __FILE__);
179
180         if (index >= MAX_FB_BUFFER)
181                 return NULL;
182
183         buffer = exynos_fb->exynos_gem_obj[index]->buffer;
184         if (!buffer)
185                 return NULL;
186
187         DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n",
188                         (unsigned long)buffer->kvaddr,
189                         (unsigned long)buffer->dma_addr);
190
191         return buffer;
192 }
193
194 static void exynos_drm_output_poll_changed(struct drm_device *dev)
195 {
196         struct exynos_drm_private *private = dev->dev_private;
197         struct drm_fb_helper *fb_helper = private->fb_helper;
198
199         if (fb_helper)
200                 drm_fb_helper_hotplug_event(fb_helper);
201 }
202
203 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
204         .fb_create = exynos_user_fb_create,
205         .output_poll_changed = exynos_drm_output_poll_changed,
206 };
207
208 void exynos_drm_mode_config_init(struct drm_device *dev)
209 {
210         dev->mode_config.min_width = 0;
211         dev->mode_config.min_height = 0;
212
213         /*
214          * set max width and height as default value(4096x4096).
215          * this value would be used to check framebuffer size limitation
216          * at drm_mode_addfb().
217          */
218         dev->mode_config.max_width = 4096;
219         dev->mode_config.max_height = 4096;
220
221         dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
222 }