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