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"
19 #include "msm_kms.h"
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[MAX_PLANE];
28 };
29 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
30
31
msm_framebuffer_create_handle(struct drm_framebuffer * fb,struct drm_file * file_priv,unsigned int * handle)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
msm_framebuffer_destroy(struct drm_framebuffer * fb)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
53 drm_gem_object_unreference_unlocked(bo);
54 }
55
56 kfree(msm_fb);
57 }
58
59 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
60 .create_handle = msm_framebuffer_create_handle,
61 .destroy = msm_framebuffer_destroy,
62 };
63
64 #ifdef CONFIG_DEBUG_FS
msm_framebuffer_describe(struct drm_framebuffer * fb,struct seq_file * m)65 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
66 {
67 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
68 int i, n = drm_format_num_planes(fb->pixel_format);
69
70 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
71 fb->width, fb->height, (char *)&fb->pixel_format,
72 drm_framebuffer_read_refcount(fb), fb->base.id);
73
74 for (i = 0; i < n; i++) {
75 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
76 i, fb->offsets[i], fb->pitches[i]);
77 msm_gem_describe(msm_fb->planes[i], m);
78 }
79 }
80 #endif
81
82 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid
83 * to prepare an fb more multiple different initiator 'id's. But that
84 * should be fine, since only the scanout (mdpN) side of things needs
85 * this, the gpu doesn't care about fb's.
86 */
msm_framebuffer_prepare(struct drm_framebuffer * fb,int id)87 int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id)
88 {
89 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
90 int ret, i, n = drm_format_num_planes(fb->pixel_format);
91 uint32_t iova;
92
93 for (i = 0; i < n; i++) {
94 ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova);
95 DBG("FB[%u]: iova[%d]: %08x (%d)", fb->base.id, i, iova, ret);
96 if (ret)
97 return ret;
98 }
99
100 return 0;
101 }
102
msm_framebuffer_cleanup(struct drm_framebuffer * fb,int id)103 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id)
104 {
105 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
106 int i, n = drm_format_num_planes(fb->pixel_format);
107
108 for (i = 0; i < n; i++)
109 msm_gem_put_iova(msm_fb->planes[i], id);
110 }
111
msm_framebuffer_iova(struct drm_framebuffer * fb,int id,int plane)112 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane)
113 {
114 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
115 if (!msm_fb->planes[plane])
116 return 0;
117 return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane];
118 }
119
msm_framebuffer_bo(struct drm_framebuffer * fb,int plane)120 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
121 {
122 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
123 return msm_fb->planes[plane];
124 }
125
msm_framebuffer_format(struct drm_framebuffer * fb)126 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
127 {
128 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
129 return msm_fb->format;
130 }
131
msm_framebuffer_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)132 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
133 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
134 {
135 struct drm_gem_object *bos[4] = {0};
136 struct drm_framebuffer *fb;
137 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
138
139 for (i = 0; i < n; i++) {
140 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
141 if (!bos[i]) {
142 ret = -ENXIO;
143 goto out_unref;
144 }
145 }
146
147 fb = msm_framebuffer_init(dev, mode_cmd, bos);
148 if (IS_ERR(fb)) {
149 ret = PTR_ERR(fb);
150 goto out_unref;
151 }
152
153 return fb;
154
155 out_unref:
156 for (i = 0; i < n; i++)
157 drm_gem_object_unreference_unlocked(bos[i]);
158 return ERR_PTR(ret);
159 }
160
msm_framebuffer_init(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** bos)161 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
162 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
163 {
164 struct msm_drm_private *priv = dev->dev_private;
165 struct msm_kms *kms = priv->kms;
166 struct msm_framebuffer *msm_fb = NULL;
167 struct drm_framebuffer *fb;
168 const struct msm_format *format;
169 int ret, i, n;
170 unsigned int hsub, vsub;
171
172 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
173 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
174 (char *)&mode_cmd->pixel_format);
175
176 n = drm_format_num_planes(mode_cmd->pixel_format);
177 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
178 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
179
180 format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
181 if (!format) {
182 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
183 (char *)&mode_cmd->pixel_format);
184 ret = -EINVAL;
185 goto fail;
186 }
187
188 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
189 if (!msm_fb) {
190 ret = -ENOMEM;
191 goto fail;
192 }
193
194 fb = &msm_fb->base;
195
196 msm_fb->format = format;
197
198 if (n > ARRAY_SIZE(msm_fb->planes)) {
199 ret = -EINVAL;
200 goto fail;
201 }
202
203 for (i = 0; i < n; i++) {
204 unsigned int width = mode_cmd->width / (i ? hsub : 1);
205 unsigned int height = mode_cmd->height / (i ? vsub : 1);
206 unsigned int min_size;
207
208 min_size = (height - 1) * mode_cmd->pitches[i]
209 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
210 + mode_cmd->offsets[i];
211
212 if (bos[i]->size < min_size) {
213 ret = -EINVAL;
214 goto fail;
215 }
216
217 msm_fb->planes[i] = bos[i];
218 }
219
220 drm_helper_mode_fill_fb_struct(fb, mode_cmd);
221
222 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
223 if (ret) {
224 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
225 goto fail;
226 }
227
228 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
229
230 return fb;
231
232 fail:
233 kfree(msm_fb);
234
235 return ERR_PTR(ret);
236 }
237