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2048e328 MY |
1 | /* |
2 | * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd | |
3 | * Author:Mark Yao <mark.yao@rock-chips.com> | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <drm/drm.h> | |
16 | #include <drm/drmP.h> | |
17 | #include <drm/drm_fb_helper.h> | |
18 | #include <drm/drm_crtc_helper.h> | |
19 | ||
20 | #include "rockchip_drm_drv.h" | |
21 | #include "rockchip_drm_gem.h" | |
22 | #include "rockchip_drm_fb.h" | |
813cfc89 | 23 | #include "rockchip_drm_fbdev.h" |
2048e328 MY |
24 | |
25 | #define PREFERRED_BPP 32 | |
26 | #define to_drm_private(x) \ | |
27 | container_of(x, struct rockchip_drm_private, fbdev_helper) | |
28 | ||
29 | static int rockchip_fbdev_mmap(struct fb_info *info, | |
30 | struct vm_area_struct *vma) | |
31 | { | |
32 | struct drm_fb_helper *helper = info->par; | |
33 | struct rockchip_drm_private *private = to_drm_private(helper); | |
34 | ||
35 | return rockchip_gem_mmap_buf(private->fbdev_bo, vma); | |
36 | } | |
37 | ||
38 | static struct fb_ops rockchip_drm_fbdev_ops = { | |
39 | .owner = THIS_MODULE, | |
72b6bcb1 | 40 | DRM_FB_HELPER_DEFAULT_OPS, |
2048e328 | 41 | .fb_mmap = rockchip_fbdev_mmap, |
df3b031c AT |
42 | .fb_fillrect = drm_fb_helper_cfb_fillrect, |
43 | .fb_copyarea = drm_fb_helper_cfb_copyarea, | |
44 | .fb_imageblit = drm_fb_helper_cfb_imageblit, | |
2048e328 MY |
45 | }; |
46 | ||
47 | static int rockchip_drm_fbdev_create(struct drm_fb_helper *helper, | |
48 | struct drm_fb_helper_surface_size *sizes) | |
49 | { | |
50 | struct rockchip_drm_private *private = to_drm_private(helper); | |
51 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; | |
52 | struct drm_device *dev = helper->dev; | |
53 | struct rockchip_gem_object *rk_obj; | |
54 | struct drm_framebuffer *fb; | |
55 | unsigned int bytes_per_pixel; | |
56 | unsigned long offset; | |
57 | struct fb_info *fbi; | |
58 | size_t size; | |
59 | int ret; | |
60 | ||
61 | bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); | |
62 | ||
63 | mode_cmd.width = sizes->surface_width; | |
64 | mode_cmd.height = sizes->surface_height; | |
65 | mode_cmd.pitches[0] = sizes->surface_width * bytes_per_pixel; | |
66 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
67 | sizes->surface_depth); | |
68 | ||
69 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
70 | ||
f76c83b5 | 71 | rk_obj = rockchip_gem_create_object(dev, size, true); |
2048e328 MY |
72 | if (IS_ERR(rk_obj)) |
73 | return -ENOMEM; | |
74 | ||
75 | private->fbdev_bo = &rk_obj->base; | |
76 | ||
df3b031c AT |
77 | fbi = drm_fb_helper_alloc_fbi(helper); |
78 | if (IS_ERR(fbi)) { | |
d8dd6804 | 79 | DRM_DEV_ERROR(dev->dev, "Failed to create framebuffer info.\n"); |
df3b031c | 80 | ret = PTR_ERR(fbi); |
da7bdda2 | 81 | goto out; |
2048e328 MY |
82 | } |
83 | ||
84 | helper->fb = rockchip_drm_framebuffer_init(dev, &mode_cmd, | |
85 | private->fbdev_bo); | |
86 | if (IS_ERR(helper->fb)) { | |
d8dd6804 HM |
87 | DRM_DEV_ERROR(dev->dev, |
88 | "Failed to allocate DRM framebuffer.\n"); | |
2048e328 | 89 | ret = PTR_ERR(helper->fb); |
da7bdda2 | 90 | goto out; |
2048e328 MY |
91 | } |
92 | ||
2048e328 MY |
93 | fbi->par = helper; |
94 | fbi->flags = FBINFO_FLAG_DEFAULT; | |
95 | fbi->fbops = &rockchip_drm_fbdev_ops; | |
96 | ||
2048e328 | 97 | fb = helper->fb; |
b00c600e | 98 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth); |
d3c8ea34 | 99 | drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height); |
2048e328 MY |
100 | |
101 | offset = fbi->var.xoffset * bytes_per_pixel; | |
102 | offset += fbi->var.yoffset * fb->pitches[0]; | |
103 | ||
104 | dev->mode_config.fb_base = 0; | |
105 | fbi->screen_base = rk_obj->kvaddr + offset; | |
106 | fbi->screen_size = rk_obj->base.size; | |
107 | fbi->fix.smem_len = rk_obj->base.size; | |
108 | ||
913bb40a | 109 | DRM_DEBUG_KMS("FB [%dx%d]-%d kvaddr=%p offset=%ld size=%zu\n", |
b00c600e VS |
110 | fb->width, fb->height, fb->format->depth, |
111 | rk_obj->kvaddr, | |
2048e328 | 112 | offset, size); |
b340b3fb CW |
113 | |
114 | fbi->skip_vt_switch = true; | |
115 | ||
2048e328 MY |
116 | return 0; |
117 | ||
da7bdda2 | 118 | out: |
2048e328 MY |
119 | rockchip_gem_free_object(&rk_obj->base); |
120 | return ret; | |
121 | } | |
122 | ||
123 | static const struct drm_fb_helper_funcs rockchip_drm_fb_helper_funcs = { | |
124 | .fb_probe = rockchip_drm_fbdev_create, | |
125 | }; | |
126 | ||
127 | int rockchip_drm_fbdev_init(struct drm_device *dev) | |
128 | { | |
129 | struct rockchip_drm_private *private = dev->dev_private; | |
130 | struct drm_fb_helper *helper; | |
2048e328 MY |
131 | int ret; |
132 | ||
133 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) | |
134 | return -EINVAL; | |
135 | ||
2048e328 MY |
136 | helper = &private->fbdev_helper; |
137 | ||
138 | drm_fb_helper_prepare(dev, helper, &rockchip_drm_fb_helper_funcs); | |
139 | ||
e4563f6b | 140 | ret = drm_fb_helper_init(dev, helper, ROCKCHIP_MAX_CONNECTOR); |
2048e328 | 141 | if (ret < 0) { |
d8dd6804 HM |
142 | DRM_DEV_ERROR(dev->dev, |
143 | "Failed to initialize drm fb helper - %d.\n", | |
144 | ret); | |
2048e328 MY |
145 | return ret; |
146 | } | |
147 | ||
148 | ret = drm_fb_helper_single_add_all_connectors(helper); | |
149 | if (ret < 0) { | |
d8dd6804 HM |
150 | DRM_DEV_ERROR(dev->dev, |
151 | "Failed to add connectors - %d.\n", ret); | |
2048e328 MY |
152 | goto err_drm_fb_helper_fini; |
153 | } | |
154 | ||
2048e328 MY |
155 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); |
156 | if (ret < 0) { | |
d8dd6804 HM |
157 | DRM_DEV_ERROR(dev->dev, |
158 | "Failed to set initial hw config - %d.\n", | |
159 | ret); | |
2048e328 MY |
160 | goto err_drm_fb_helper_fini; |
161 | } | |
162 | ||
163 | return 0; | |
164 | ||
165 | err_drm_fb_helper_fini: | |
166 | drm_fb_helper_fini(helper); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | void rockchip_drm_fbdev_fini(struct drm_device *dev) | |
171 | { | |
172 | struct rockchip_drm_private *private = dev->dev_private; | |
173 | struct drm_fb_helper *helper; | |
174 | ||
175 | helper = &private->fbdev_helper; | |
176 | ||
df3b031c | 177 | drm_fb_helper_unregister_fbi(helper); |
2048e328 MY |
178 | |
179 | if (helper->fb) | |
adedbf03 | 180 | drm_framebuffer_put(helper->fb); |
2048e328 MY |
181 | |
182 | drm_fb_helper_fini(helper); | |
183 | } |