tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
57 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
58};
59
60static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
61 .fb_create = drm_gem_fb_create_with_dirty,
62 .output_poll_changed = drm_fb_helper_output_poll_changed,
63 .atomic_check = drm_atomic_helper_check,
64 .atomic_commit = drm_atomic_helper_commit,
65};
66
67struct drm_framebuffer *
68rockchip_drm_framebuffer_init(struct drm_device *dev,
69 const struct drm_mode_fb_cmd2 *mode_cmd,
70 struct drm_gem_object *obj)
71{
72 struct drm_framebuffer *fb;
73
74 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
75 if (IS_ERR(fb))
76 return ERR_CAST(fb);
77
78 return fb;
79}
80
81void rockchip_drm_mode_config_init(struct drm_device *dev)
82{
83 dev->mode_config.min_width = 0;
84 dev->mode_config.min_height = 0;
85
86 /*
87 * set max width and height as default value(4096x4096).
88 * this value would be used to check framebuffer size limitation
89 * at drm_mode_addfb().
90 */
91 dev->mode_config.max_width = 4096;
92 dev->mode_config.max_height = 4096;
93
94 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
95 dev->mode_config.helper_private = &rockchip_mode_config_helpers;
96}