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c8afe684 RC |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include "msm_drv.h" | |
dd2da6e3 | 19 | #include "msm_kms.h" |
c8afe684 RC |
20 | |
21 | #include "drm_crtc.h" | |
22 | #include "drm_crtc_helper.h" | |
23 | ||
24 | struct msm_framebuffer { | |
25 | struct drm_framebuffer base; | |
26 | const struct msm_format *format; | |
27 | struct drm_gem_object *planes[2]; | |
28 | }; | |
29 | #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) | |
30 | ||
31 | ||
32 | static int msm_framebuffer_create_handle(struct drm_framebuffer *fb, | |
33 | struct drm_file *file_priv, | |
34 | unsigned int *handle) | |
35 | { | |
36 | struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); | |
37 | return drm_gem_handle_create(file_priv, | |
38 | msm_fb->planes[0], handle); | |
39 | } | |
40 | ||
41 | static void msm_framebuffer_destroy(struct drm_framebuffer *fb) | |
42 | { | |
43 | struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); | |
44 | int i, n = drm_format_num_planes(fb->pixel_format); | |
45 | ||
46 | DBG("destroy: FB ID: %d (%p)", fb->base.id, fb); | |
47 | ||
48 | drm_framebuffer_cleanup(fb); | |
49 | ||
50 | for (i = 0; i < n; i++) { | |
51 | struct drm_gem_object *bo = msm_fb->planes[i]; | |
52 | if (bo) | |
53 | drm_gem_object_unreference_unlocked(bo); | |
54 | } | |
55 | ||
56 | kfree(msm_fb); | |
57 | } | |
58 | ||
59 | static int msm_framebuffer_dirty(struct drm_framebuffer *fb, | |
60 | struct drm_file *file_priv, unsigned flags, unsigned color, | |
61 | struct drm_clip_rect *clips, unsigned num_clips) | |
62 | { | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { | |
67 | .create_handle = msm_framebuffer_create_handle, | |
68 | .destroy = msm_framebuffer_destroy, | |
69 | .dirty = msm_framebuffer_dirty, | |
70 | }; | |
71 | ||
72 | #ifdef CONFIG_DEBUG_FS | |
73 | void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) | |
74 | { | |
75 | struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); | |
76 | int i, n = drm_format_num_planes(fb->pixel_format); | |
77 | ||
78 | seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", | |
79 | fb->width, fb->height, (char *)&fb->pixel_format, | |
80 | fb->refcount.refcount.counter, fb->base.id); | |
81 | ||
82 | for (i = 0; i < n; i++) { | |
83 | seq_printf(m, " %d: offset=%d pitch=%d, obj: ", | |
84 | i, fb->offsets[i], fb->pitches[i]); | |
85 | msm_gem_describe(msm_fb->planes[i], m); | |
86 | } | |
87 | } | |
88 | #endif | |
89 | ||
90 | struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) | |
91 | { | |
92 | struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); | |
93 | return msm_fb->planes[plane]; | |
94 | } | |
95 | ||
96 | const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) | |
97 | { | |
98 | struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); | |
99 | return msm_fb->format; | |
100 | } | |
101 | ||
102 | struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, | |
103 | struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd) | |
104 | { | |
105 | struct drm_gem_object *bos[4] = {0}; | |
106 | struct drm_framebuffer *fb; | |
107 | int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); | |
108 | ||
109 | for (i = 0; i < n; i++) { | |
110 | bos[i] = drm_gem_object_lookup(dev, file, | |
111 | mode_cmd->handles[i]); | |
112 | if (!bos[i]) { | |
113 | ret = -ENXIO; | |
114 | goto out_unref; | |
115 | } | |
116 | } | |
117 | ||
118 | fb = msm_framebuffer_init(dev, mode_cmd, bos); | |
119 | if (IS_ERR(fb)) { | |
120 | ret = PTR_ERR(fb); | |
121 | goto out_unref; | |
122 | } | |
123 | ||
124 | return fb; | |
125 | ||
126 | out_unref: | |
127 | for (i = 0; i < n; i++) | |
128 | drm_gem_object_unreference_unlocked(bos[i]); | |
129 | return ERR_PTR(ret); | |
130 | } | |
131 | ||
132 | struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, | |
133 | struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) | |
134 | { | |
135 | struct msm_drm_private *priv = dev->dev_private; | |
136 | struct msm_kms *kms = priv->kms; | |
137 | struct msm_framebuffer *msm_fb; | |
138 | struct drm_framebuffer *fb = NULL; | |
139 | const struct msm_format *format; | |
140 | int ret, i, n; | |
141 | unsigned int hsub, vsub; | |
142 | ||
143 | DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", | |
144 | dev, mode_cmd, mode_cmd->width, mode_cmd->height, | |
145 | (char *)&mode_cmd->pixel_format); | |
146 | ||
147 | n = drm_format_num_planes(mode_cmd->pixel_format); | |
148 | hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); | |
149 | vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); | |
150 | ||
151 | format = kms->funcs->get_format(kms, mode_cmd->pixel_format); | |
152 | if (!format) { | |
153 | dev_err(dev->dev, "unsupported pixel format: %4.4s\n", | |
154 | (char *)&mode_cmd->pixel_format); | |
155 | ret = -EINVAL; | |
156 | goto fail; | |
157 | } | |
158 | ||
159 | msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); | |
160 | if (!msm_fb) { | |
161 | ret = -ENOMEM; | |
162 | goto fail; | |
163 | } | |
164 | ||
165 | fb = &msm_fb->base; | |
166 | ||
167 | msm_fb->format = format; | |
168 | ||
169 | for (i = 0; i < n; i++) { | |
170 | unsigned int width = mode_cmd->width / (i ? hsub : 1); | |
171 | unsigned int height = mode_cmd->height / (i ? vsub : 1); | |
172 | unsigned int min_size; | |
173 | ||
174 | min_size = (height - 1) * mode_cmd->pitches[i] | |
175 | + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) | |
176 | + mode_cmd->offsets[i]; | |
177 | ||
178 | if (bos[i]->size < min_size) { | |
179 | ret = -EINVAL; | |
180 | goto fail; | |
181 | } | |
182 | ||
183 | msm_fb->planes[i] = bos[i]; | |
184 | } | |
185 | ||
186 | drm_helper_mode_fill_fb_struct(fb, mode_cmd); | |
187 | ||
188 | ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); | |
189 | if (ret) { | |
190 | dev_err(dev->dev, "framebuffer init failed: %d\n", ret); | |
191 | goto fail; | |
192 | } | |
193 | ||
194 | DBG("create: FB ID: %d (%p)", fb->base.id, fb); | |
195 | ||
196 | return fb; | |
197 | ||
198 | fail: | |
199 | if (fb) | |
200 | msm_framebuffer_destroy(fb); | |
201 | ||
202 | return ERR_PTR(ret); | |
203 | } |