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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author:Mark Yao <mark.yao@rock-chips.com>
5 */
6
7#include <linux/kernel.h>
8
9#include <drm/drm.h>
10#include <drm/drm_atomic.h>
11#include <drm/drm_damage_helper.h>
12#include <drm/drm_fourcc.h>
13#include <drm/drm_framebuffer.h>
14#include <drm/drm_gem_framebuffer_helper.h>
15#include <drm/drm_probe_helper.h>
16
17#include "rockchip_drm_drv.h"
18#include "rockchip_drm_fb.h"
19#include "rockchip_drm_gem.h"
20
21static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
22 .destroy = drm_gem_fb_destroy,
23 .create_handle = drm_gem_fb_create_handle,
24 .dirty = drm_atomic_helper_dirtyfb,
25};
26
27static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
28 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
29};
30
31static struct drm_framebuffer *
32rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
33 const struct drm_mode_fb_cmd2 *mode_cmd)
34{
35 struct drm_afbc_framebuffer *afbc_fb;
36 const struct drm_format_info *info;
37 int ret;
38
39 info = drm_get_format_info(dev, mode_cmd);
40 if (!info)
41 return ERR_PTR(-ENOMEM);
42
43 afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL);
44 if (!afbc_fb)
45 return ERR_PTR(-ENOMEM);
46
47 ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base, file, mode_cmd,
48 &rockchip_drm_fb_funcs);
49 if (ret) {
50 kfree(afbc_fb);
51 return ERR_PTR(ret);
52 }
53
54 if (drm_is_afbc(mode_cmd->modifier[0])) {
55 int ret, i;
56
57 ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb);
58 if (ret) {
59 struct drm_gem_object **obj = afbc_fb->base.obj;
60
61 for (i = 0; i < info->num_planes; ++i)
62 drm_gem_object_put(obj[i]);
63
64 kfree(afbc_fb);
65 return ERR_PTR(ret);
66 }
67 }
68
69 return &afbc_fb->base;
70}
71
72static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
73 .fb_create = rockchip_fb_create,
74 .atomic_check = drm_atomic_helper_check,
75 .atomic_commit = drm_atomic_helper_commit,
76};
77
78void rockchip_drm_mode_config_init(struct drm_device *dev)
79{
80 dev->mode_config.min_width = 0;
81 dev->mode_config.min_height = 0;
82
83 /*
84 * set max width and height as default value(4096x4096).
85 * this value would be used to check framebuffer size limitation
86 * at drm_mode_addfb().
87 */
88 dev->mode_config.max_width = 4096;
89 dev->mode_config.max_height = 4096;
90
91 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
92 dev->mode_config.helper_private = &rockchip_mode_config_helpers;
93
94 dev->mode_config.normalize_zpos = true;
95}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author:Mark Yao <mark.yao@rock-chips.com>
5 */
6
7#include <linux/kernel.h>
8
9#include <drm/drm.h>
10#include <drm/drm_atomic.h>
11#include <drm/drm_damage_helper.h>
12#include <drm/drm_fb_helper.h>
13#include <drm/drm_fourcc.h>
14#include <drm/drm_gem_framebuffer_helper.h>
15#include <drm/drm_probe_helper.h>
16
17#include "rockchip_drm_drv.h"
18#include "rockchip_drm_fb.h"
19#include "rockchip_drm_gem.h"
20
21static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
22 .destroy = drm_gem_fb_destroy,
23 .create_handle = drm_gem_fb_create_handle,
24 .dirty = drm_atomic_helper_dirtyfb,
25};
26
27static struct drm_framebuffer *
28rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
29 struct drm_gem_object **obj, unsigned int num_planes)
30{
31 struct drm_framebuffer *fb;
32 int ret;
33 int i;
34
35 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
36 if (!fb)
37 return ERR_PTR(-ENOMEM);
38
39 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
40
41 for (i = 0; i < num_planes; i++)
42 fb->obj[i] = obj[i];
43
44 ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs);
45 if (ret) {
46 DRM_DEV_ERROR(dev->dev,
47 "Failed to initialize framebuffer: %d\n",
48 ret);
49 kfree(fb);
50 return ERR_PTR(ret);
51 }
52
53 return fb;
54}
55
56static struct drm_framebuffer *
57rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
58 const struct drm_mode_fb_cmd2 *mode_cmd)
59{
60 const struct drm_format_info *info = drm_get_format_info(dev,
61 mode_cmd);
62 struct drm_framebuffer *fb;
63 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
64 struct drm_gem_object *obj;
65 int num_planes = min_t(int, info->num_planes, ROCKCHIP_MAX_FB_BUFFER);
66 int ret;
67 int i;
68
69 for (i = 0; i < num_planes; i++) {
70 unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
71 unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
72 unsigned int min_size;
73
74 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
75 if (!obj) {
76 DRM_DEV_ERROR(dev->dev,
77 "Failed to lookup GEM object\n");
78 ret = -ENXIO;
79 goto err_gem_object_unreference;
80 }
81
82 min_size = (height - 1) * mode_cmd->pitches[i] +
83 mode_cmd->offsets[i] +
84 width * info->cpp[i];
85
86 if (obj->size < min_size) {
87 drm_gem_object_put_unlocked(obj);
88 ret = -EINVAL;
89 goto err_gem_object_unreference;
90 }
91 objs[i] = obj;
92 }
93
94 fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
95 if (IS_ERR(fb)) {
96 ret = PTR_ERR(fb);
97 goto err_gem_object_unreference;
98 }
99
100 return fb;
101
102err_gem_object_unreference:
103 for (i--; i >= 0; i--)
104 drm_gem_object_put_unlocked(objs[i]);
105 return ERR_PTR(ret);
106}
107
108static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
109 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
110};
111
112static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
113 .fb_create = rockchip_user_fb_create,
114 .output_poll_changed = drm_fb_helper_output_poll_changed,
115 .atomic_check = drm_atomic_helper_check,
116 .atomic_commit = drm_atomic_helper_commit,
117};
118
119struct drm_framebuffer *
120rockchip_drm_framebuffer_init(struct drm_device *dev,
121 const struct drm_mode_fb_cmd2 *mode_cmd,
122 struct drm_gem_object *obj)
123{
124 struct drm_framebuffer *fb;
125
126 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
127 if (IS_ERR(fb))
128 return ERR_CAST(fb);
129
130 return fb;
131}
132
133void rockchip_drm_mode_config_init(struct drm_device *dev)
134{
135 dev->mode_config.min_width = 0;
136 dev->mode_config.min_height = 0;
137
138 /*
139 * set max width and height as default value(4096x4096).
140 * this value would be used to check framebuffer size limitation
141 * at drm_mode_addfb().
142 */
143 dev->mode_config.max_width = 4096;
144 dev->mode_config.max_height = 4096;
145
146 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
147 dev->mode_config.helper_private = &rockchip_mode_config_helpers;
148}