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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* exynos_drm_fb.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Authors:
6 * Inki Dae <inki.dae@samsung.com>
7 * Joonyoung Shim <jy0922.shim@samsung.com>
8 * Seung-Woo Kim <sw0312.kim@samsung.com>
9 */
10
11#include <drm/drm_atomic.h>
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_crtc.h>
14#include <drm/drm_framebuffer.h>
15#include <drm/drm_fourcc.h>
16#include <drm/drm_gem_framebuffer_helper.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/exynos_drm.h>
19
20#include "exynos_drm_crtc.h"
21#include "exynos_drm_drv.h"
22#include "exynos_drm_fb.h"
23#include "exynos_drm_fbdev.h"
24
25static int check_fb_gem_memory_type(struct drm_device *drm_dev,
26 struct exynos_drm_gem *exynos_gem)
27{
28 unsigned int flags;
29
30 /*
31 * if exynos drm driver supports iommu then framebuffer can use
32 * all the buffer types.
33 */
34 if (is_drm_iommu_supported(drm_dev))
35 return 0;
36
37 flags = exynos_gem->flags;
38
39 /*
40 * Physically non-contiguous memory type for framebuffer is not
41 * supported without IOMMU.
42 */
43 if (IS_NONCONTIG_BUFFER(flags)) {
44 DRM_DEV_ERROR(drm_dev->dev,
45 "Non-contiguous GEM memory is not supported.\n");
46 return -EINVAL;
47 }
48
49 return 0;
50}
51
52static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
53 .destroy = drm_gem_fb_destroy,
54 .create_handle = drm_gem_fb_create_handle,
55};
56
57struct drm_framebuffer *
58exynos_drm_framebuffer_init(struct drm_device *dev,
59 const struct drm_mode_fb_cmd2 *mode_cmd,
60 struct exynos_drm_gem **exynos_gem,
61 int count)
62{
63 struct drm_framebuffer *fb;
64 int i;
65 int ret;
66
67 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
68 if (!fb)
69 return ERR_PTR(-ENOMEM);
70
71 for (i = 0; i < count; i++) {
72 ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
73 if (ret < 0)
74 goto err;
75
76 fb->obj[i] = &exynos_gem[i]->base;
77 }
78
79 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
80
81 ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
82 if (ret < 0) {
83 DRM_DEV_ERROR(dev->dev,
84 "failed to initialize framebuffer\n");
85 goto err;
86 }
87
88 return fb;
89
90err:
91 kfree(fb);
92 return ERR_PTR(ret);
93}
94
95static struct drm_framebuffer *
96exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
97 const struct drm_mode_fb_cmd2 *mode_cmd)
98{
99 const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
100 struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
101 struct drm_framebuffer *fb;
102 int i;
103 int ret;
104
105 for (i = 0; i < info->num_planes; i++) {
106 unsigned int height = (i == 0) ? mode_cmd->height :
107 DIV_ROUND_UP(mode_cmd->height, info->vsub);
108 unsigned long size = height * mode_cmd->pitches[i] +
109 mode_cmd->offsets[i];
110
111 exynos_gem[i] = exynos_drm_gem_get(file_priv,
112 mode_cmd->handles[i]);
113 if (!exynos_gem[i]) {
114 DRM_DEV_ERROR(dev->dev,
115 "failed to lookup gem object\n");
116 ret = -ENOENT;
117 goto err;
118 }
119
120 if (size > exynos_gem[i]->size) {
121 i++;
122 ret = -EINVAL;
123 goto err;
124 }
125 }
126
127 fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
128 if (IS_ERR(fb)) {
129 ret = PTR_ERR(fb);
130 goto err;
131 }
132
133 return fb;
134
135err:
136 while (i--)
137 exynos_drm_gem_put(exynos_gem[i]);
138
139 return ERR_PTR(ret);
140}
141
142dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
143{
144 struct exynos_drm_gem *exynos_gem;
145
146 if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
147 return 0;
148
149 exynos_gem = to_exynos_gem(fb->obj[index]);
150 return exynos_gem->dma_addr + fb->offsets[index];
151}
152
153static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
154 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
155};
156
157static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
158 .fb_create = exynos_user_fb_create,
159 .atomic_check = drm_atomic_helper_check,
160 .atomic_commit = drm_atomic_helper_commit,
161};
162
163void exynos_drm_mode_config_init(struct drm_device *dev)
164{
165 dev->mode_config.min_width = 0;
166 dev->mode_config.min_height = 0;
167
168 /*
169 * set max width and height as default value(4096x4096).
170 * this value would be used to check framebuffer size limitation
171 * at drm_mode_addfb().
172 */
173 dev->mode_config.max_width = 4096;
174 dev->mode_config.max_height = 4096;
175
176 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
177 dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
178
179 dev->mode_config.normalize_zpos = true;
180}
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 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15#include <drm/drmP.h>
16#include <drm/drm_crtc.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_fb_helper.h>
19#include <drm/drm_atomic.h>
20#include <drm/drm_atomic_helper.h>
21#include <drm/drm_gem_framebuffer_helper.h>
22#include <uapi/drm/exynos_drm.h>
23
24#include "exynos_drm_drv.h"
25#include "exynos_drm_fb.h"
26#include "exynos_drm_fbdev.h"
27#include "exynos_drm_iommu.h"
28#include "exynos_drm_crtc.h"
29
30static int check_fb_gem_memory_type(struct drm_device *drm_dev,
31 struct exynos_drm_gem *exynos_gem)
32{
33 unsigned int flags;
34
35 /*
36 * if exynos drm driver supports iommu then framebuffer can use
37 * all the buffer types.
38 */
39 if (is_drm_iommu_supported(drm_dev))
40 return 0;
41
42 flags = exynos_gem->flags;
43
44 /*
45 * Physically non-contiguous memory type for framebuffer is not
46 * supported without IOMMU.
47 */
48 if (IS_NONCONTIG_BUFFER(flags)) {
49 DRM_ERROR("Non-contiguous GEM memory is not supported.\n");
50 return -EINVAL;
51 }
52
53 return 0;
54}
55
56static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
57 .destroy = drm_gem_fb_destroy,
58 .create_handle = drm_gem_fb_create_handle,
59};
60
61struct drm_framebuffer *
62exynos_drm_framebuffer_init(struct drm_device *dev,
63 const struct drm_mode_fb_cmd2 *mode_cmd,
64 struct exynos_drm_gem **exynos_gem,
65 int count)
66{
67 struct drm_framebuffer *fb;
68 int i;
69 int ret;
70
71 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
72 if (!fb)
73 return ERR_PTR(-ENOMEM);
74
75 for (i = 0; i < count; i++) {
76 ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
77 if (ret < 0)
78 goto err;
79
80 fb->obj[i] = &exynos_gem[i]->base;
81 }
82
83 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
84
85 ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
86 if (ret < 0) {
87 DRM_ERROR("failed to initialize framebuffer\n");
88 goto err;
89 }
90
91 return fb;
92
93err:
94 kfree(fb);
95 return ERR_PTR(ret);
96}
97
98static struct drm_framebuffer *
99exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
100 const struct drm_mode_fb_cmd2 *mode_cmd)
101{
102 const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
103 struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
104 struct drm_gem_object *obj;
105 struct drm_framebuffer *fb;
106 int i;
107 int ret;
108
109 for (i = 0; i < info->num_planes; i++) {
110 unsigned int height = (i == 0) ? mode_cmd->height :
111 DIV_ROUND_UP(mode_cmd->height, info->vsub);
112 unsigned long size = height * mode_cmd->pitches[i] +
113 mode_cmd->offsets[i];
114
115 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
116 if (!obj) {
117 DRM_ERROR("failed to lookup gem object\n");
118 ret = -ENOENT;
119 goto err;
120 }
121
122 exynos_gem[i] = to_exynos_gem(obj);
123
124 if (size > exynos_gem[i]->size) {
125 i++;
126 ret = -EINVAL;
127 goto err;
128 }
129 }
130
131 fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
132 if (IS_ERR(fb)) {
133 ret = PTR_ERR(fb);
134 goto err;
135 }
136
137 return fb;
138
139err:
140 while (i--)
141 drm_gem_object_unreference_unlocked(&exynos_gem[i]->base);
142
143 return ERR_PTR(ret);
144}
145
146dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
147{
148 struct exynos_drm_gem *exynos_gem;
149
150 if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
151 return 0;
152
153 exynos_gem = to_exynos_gem(fb->obj[index]);
154 return exynos_gem->dma_addr + fb->offsets[index];
155}
156
157static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
158 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
159};
160
161static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
162 .fb_create = exynos_user_fb_create,
163 .output_poll_changed = drm_fb_helper_output_poll_changed,
164 .atomic_check = exynos_atomic_check,
165 .atomic_commit = drm_atomic_helper_commit,
166};
167
168void exynos_drm_mode_config_init(struct drm_device *dev)
169{
170 dev->mode_config.min_width = 0;
171 dev->mode_config.min_height = 0;
172
173 /*
174 * set max width and height as default value(4096x4096).
175 * this value would be used to check framebuffer size limitation
176 * at drm_mode_addfb().
177 */
178 dev->mode_config.max_width = 4096;
179 dev->mode_config.max_height = 4096;
180
181 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
182 dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
183
184 dev->mode_config.allow_fb_modifiers = true;
185}