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
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 const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
28 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
29 };
30
31 static struct drm_framebuffer *
rockchip_fb_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)32 rockchip_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
72 static 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
rockchip_drm_mode_config_init(struct drm_device * dev)78 void 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 }
96