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
21 static 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
27 static struct drm_framebuffer *
rockchip_fb_alloc(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** obj,unsigned int num_planes)28 rockchip_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
56 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
57 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
58 };
59
60 static struct drm_framebuffer *
rockchip_fb_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)61 rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
62 const struct drm_mode_fb_cmd2 *mode_cmd)
63 {
64 struct drm_afbc_framebuffer *afbc_fb;
65 const struct drm_format_info *info;
66 int ret;
67
68 info = drm_get_format_info(dev, mode_cmd);
69 if (!info)
70 return ERR_PTR(-ENOMEM);
71
72 afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL);
73 if (!afbc_fb)
74 return ERR_PTR(-ENOMEM);
75
76 ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base, file, mode_cmd,
77 &rockchip_drm_fb_funcs);
78 if (ret) {
79 kfree(afbc_fb);
80 return ERR_PTR(ret);
81 }
82
83 if (drm_is_afbc(mode_cmd->modifier[0])) {
84 int ret, i;
85
86 ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb);
87 if (ret) {
88 struct drm_gem_object **obj = afbc_fb->base.obj;
89
90 for (i = 0; i < info->num_planes; ++i)
91 drm_gem_object_put(obj[i]);
92
93 kfree(afbc_fb);
94 return ERR_PTR(ret);
95 }
96 }
97
98 return &afbc_fb->base;
99 }
100
101 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
102 .fb_create = rockchip_fb_create,
103 .output_poll_changed = drm_fb_helper_output_poll_changed,
104 .atomic_check = drm_atomic_helper_check,
105 .atomic_commit = drm_atomic_helper_commit,
106 };
107
108 struct drm_framebuffer *
rockchip_drm_framebuffer_init(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object * obj)109 rockchip_drm_framebuffer_init(struct drm_device *dev,
110 const struct drm_mode_fb_cmd2 *mode_cmd,
111 struct drm_gem_object *obj)
112 {
113 struct drm_framebuffer *fb;
114
115 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
116 if (IS_ERR(fb))
117 return ERR_CAST(fb);
118
119 return fb;
120 }
121
rockchip_drm_mode_config_init(struct drm_device * dev)122 void rockchip_drm_mode_config_init(struct drm_device *dev)
123 {
124 dev->mode_config.min_width = 0;
125 dev->mode_config.min_height = 0;
126
127 /*
128 * set max width and height as default value(4096x4096).
129 * this value would be used to check framebuffer size limitation
130 * at drm_mode_addfb().
131 */
132 dev->mode_config.max_width = 4096;
133 dev->mode_config.max_height = 4096;
134
135 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
136 dev->mode_config.helper_private = &rockchip_mode_config_helpers;
137 }
138