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2048e328 MY |
1 | /* |
2 | * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd | |
3 | * Author:Mark Yao <mark.yao@rock-chips.com> | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <drm/drm.h> | |
17 | #include <drm/drmP.h> | |
18 | #include <drm/drm_fb_helper.h> | |
19 | #include <drm/drm_crtc_helper.h> | |
20 | ||
21 | #include "rockchip_drm_drv.h" | |
22 | #include "rockchip_drm_gem.h" | |
23 | ||
24 | #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) | |
25 | ||
26 | struct rockchip_drm_fb { | |
27 | struct drm_framebuffer fb; | |
28 | struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER]; | |
29 | }; | |
30 | ||
31 | struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb, | |
32 | unsigned int plane) | |
33 | { | |
34 | struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb); | |
35 | ||
36 | if (plane >= ROCKCHIP_MAX_FB_BUFFER) | |
37 | return NULL; | |
38 | ||
39 | return rk_fb->obj[plane]; | |
40 | } | |
41 | EXPORT_SYMBOL_GPL(rockchip_fb_get_gem_obj); | |
42 | ||
43 | static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb) | |
44 | { | |
45 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
46 | struct drm_gem_object *obj; | |
47 | int i; | |
48 | ||
49 | for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) { | |
50 | obj = rockchip_fb->obj[i]; | |
51 | if (obj) | |
52 | drm_gem_object_unreference_unlocked(obj); | |
53 | } | |
54 | ||
55 | drm_framebuffer_cleanup(fb); | |
56 | kfree(rockchip_fb); | |
57 | } | |
58 | ||
59 | static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, | |
60 | struct drm_file *file_priv, | |
61 | unsigned int *handle) | |
62 | { | |
63 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
64 | ||
65 | return drm_gem_handle_create(file_priv, | |
66 | rockchip_fb->obj[0], handle); | |
67 | } | |
68 | ||
69 | static struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { | |
70 | .destroy = rockchip_drm_fb_destroy, | |
71 | .create_handle = rockchip_drm_fb_create_handle, | |
72 | }; | |
73 | ||
74 | static struct rockchip_drm_fb * | |
1eb83451 | 75 | rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
76 | struct drm_gem_object **obj, unsigned int num_planes) |
77 | { | |
78 | struct rockchip_drm_fb *rockchip_fb; | |
79 | int ret; | |
80 | int i; | |
81 | ||
82 | rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL); | |
83 | if (!rockchip_fb) | |
84 | return ERR_PTR(-ENOMEM); | |
85 | ||
86 | drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd); | |
87 | ||
88 | for (i = 0; i < num_planes; i++) | |
89 | rockchip_fb->obj[i] = obj[i]; | |
90 | ||
91 | ret = drm_framebuffer_init(dev, &rockchip_fb->fb, | |
92 | &rockchip_drm_fb_funcs); | |
93 | if (ret) { | |
94 | dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", | |
95 | ret); | |
96 | kfree(rockchip_fb); | |
97 | return ERR_PTR(ret); | |
98 | } | |
99 | ||
100 | return rockchip_fb; | |
101 | } | |
102 | ||
103 | static struct drm_framebuffer * | |
104 | rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, | |
1eb83451 | 105 | const struct drm_mode_fb_cmd2 *mode_cmd) |
2048e328 MY |
106 | { |
107 | struct rockchip_drm_fb *rockchip_fb; | |
108 | struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; | |
109 | struct drm_gem_object *obj; | |
110 | unsigned int hsub; | |
111 | unsigned int vsub; | |
112 | int num_planes; | |
113 | int ret; | |
114 | int i; | |
115 | ||
116 | hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); | |
117 | vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); | |
118 | num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), | |
119 | ROCKCHIP_MAX_FB_BUFFER); | |
120 | ||
121 | for (i = 0; i < num_planes; i++) { | |
122 | unsigned int width = mode_cmd->width / (i ? hsub : 1); | |
123 | unsigned int height = mode_cmd->height / (i ? vsub : 1); | |
124 | unsigned int min_size; | |
125 | ||
126 | obj = drm_gem_object_lookup(dev, file_priv, | |
127 | mode_cmd->handles[i]); | |
128 | if (!obj) { | |
129 | dev_err(dev->dev, "Failed to lookup GEM object\n"); | |
130 | ret = -ENXIO; | |
131 | goto err_gem_object_unreference; | |
132 | } | |
133 | ||
134 | min_size = (height - 1) * mode_cmd->pitches[i] + | |
135 | mode_cmd->offsets[i] + | |
136 | width * drm_format_plane_cpp(mode_cmd->pixel_format, i); | |
137 | ||
138 | if (obj->size < min_size) { | |
139 | drm_gem_object_unreference_unlocked(obj); | |
140 | ret = -EINVAL; | |
141 | goto err_gem_object_unreference; | |
142 | } | |
143 | objs[i] = obj; | |
144 | } | |
145 | ||
146 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); | |
147 | if (IS_ERR(rockchip_fb)) { | |
148 | ret = PTR_ERR(rockchip_fb); | |
149 | goto err_gem_object_unreference; | |
150 | } | |
151 | ||
152 | return &rockchip_fb->fb; | |
153 | ||
154 | err_gem_object_unreference: | |
155 | for (i--; i >= 0; i--) | |
156 | drm_gem_object_unreference_unlocked(objs[i]); | |
157 | return ERR_PTR(ret); | |
158 | } | |
159 | ||
160 | static void rockchip_drm_output_poll_changed(struct drm_device *dev) | |
161 | { | |
162 | struct rockchip_drm_private *private = dev->dev_private; | |
163 | struct drm_fb_helper *fb_helper = &private->fbdev_helper; | |
164 | ||
765c35bb HS |
165 | if (fb_helper) |
166 | drm_fb_helper_hotplug_event(fb_helper); | |
2048e328 MY |
167 | } |
168 | ||
169 | static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { | |
170 | .fb_create = rockchip_user_fb_create, | |
171 | .output_poll_changed = rockchip_drm_output_poll_changed, | |
172 | }; | |
173 | ||
174 | struct drm_framebuffer * | |
175 | rockchip_drm_framebuffer_init(struct drm_device *dev, | |
1eb83451 | 176 | const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
177 | struct drm_gem_object *obj) |
178 | { | |
179 | struct rockchip_drm_fb *rockchip_fb; | |
180 | ||
181 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); | |
182 | if (IS_ERR(rockchip_fb)) | |
183 | return NULL; | |
184 | ||
185 | return &rockchip_fb->fb; | |
186 | } | |
187 | ||
188 | void rockchip_drm_mode_config_init(struct drm_device *dev) | |
189 | { | |
190 | dev->mode_config.min_width = 0; | |
191 | dev->mode_config.min_height = 0; | |
192 | ||
193 | /* | |
194 | * set max width and height as default value(4096x4096). | |
195 | * this value would be used to check framebuffer size limitation | |
196 | * at drm_mode_addfb(). | |
197 | */ | |
198 | dev->mode_config.max_width = 4096; | |
199 | dev->mode_config.max_height = 4096; | |
200 | ||
201 | dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; | |
202 | } |