Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Russell King
4 * Written from the i915 driver.
5 */
6
7#include <linux/errno.h>
8#include <linux/fb.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11
12#include <drm/drm_crtc_helper.h>
13#include <drm/drm_drv.h>
14#include <drm/drm_fb_helper.h>
15#include <drm/drm_fourcc.h>
16
17#include "armada_crtc.h"
18#include "armada_drm.h"
19#include "armada_fb.h"
20#include "armada_gem.h"
21
22static void armada_fbdev_fb_destroy(struct fb_info *info)
23{
24 struct drm_fb_helper *fbh = info->par;
25
26 drm_fb_helper_fini(fbh);
27
28 fbh->fb->funcs->destroy(fbh->fb);
29
30 drm_client_release(&fbh->client);
31 drm_fb_helper_unprepare(fbh);
32 kfree(fbh);
33}
34
35static const struct fb_ops armada_fb_ops = {
36 .owner = THIS_MODULE,
37 FB_DEFAULT_IOMEM_OPS,
38 DRM_FB_HELPER_DEFAULT_OPS,
39 .fb_destroy = armada_fbdev_fb_destroy,
40};
41
42static const struct drm_fb_helper_funcs armada_fbdev_helper_funcs;
43
44int armada_fbdev_driver_fbdev_probe(struct drm_fb_helper *fbh,
45 struct drm_fb_helper_surface_size *sizes)
46{
47 struct drm_device *dev = fbh->dev;
48 struct drm_mode_fb_cmd2 mode;
49 struct armada_framebuffer *dfb;
50 struct armada_gem_object *obj;
51 struct fb_info *info;
52 int size, ret;
53 void *ptr;
54
55 memset(&mode, 0, sizeof(mode));
56 mode.width = sizes->surface_width;
57 mode.height = sizes->surface_height;
58 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
59 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
60 sizes->surface_depth);
61
62 size = mode.pitches[0] * mode.height;
63 obj = armada_gem_alloc_private_object(dev, size);
64 if (!obj) {
65 DRM_ERROR("failed to allocate fb memory\n");
66 return -ENOMEM;
67 }
68
69 ret = armada_gem_linear_back(dev, obj);
70 if (ret) {
71 drm_gem_object_put(&obj->obj);
72 return ret;
73 }
74
75 ptr = armada_gem_map_object(dev, obj);
76 if (!ptr) {
77 drm_gem_object_put(&obj->obj);
78 return -ENOMEM;
79 }
80
81 dfb = armada_framebuffer_create(dev, &mode, obj);
82
83 /*
84 * A reference is now held by the framebuffer object if
85 * successful, otherwise this drops the ref for the error path.
86 */
87 drm_gem_object_put(&obj->obj);
88
89 if (IS_ERR(dfb))
90 return PTR_ERR(dfb);
91
92 info = drm_fb_helper_alloc_info(fbh);
93 if (IS_ERR(info)) {
94 ret = PTR_ERR(info);
95 goto err_fballoc;
96 }
97
98 info->fbops = &armada_fb_ops;
99 info->fix.smem_start = obj->phys_addr;
100 info->fix.smem_len = obj->obj.size;
101 info->screen_size = obj->obj.size;
102 info->screen_base = ptr;
103 fbh->funcs = &armada_fbdev_helper_funcs;
104 fbh->fb = &dfb->fb;
105
106 drm_fb_helper_fill_info(info, fbh, sizes);
107
108 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
109 dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
110 (unsigned long long)obj->phys_addr);
111
112 return 0;
113
114 err_fballoc:
115 dfb->fb.funcs->destroy(&dfb->fb);
116 return ret;
117}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Russell King
4 * Written from the i915 driver.
5 */
6
7#include <linux/errno.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10
11#include <drm/drm_fb_helper.h>
12#include <drm/drm_fourcc.h>
13
14#include "armada_crtc.h"
15#include "armada_drm.h"
16#include "armada_fb.h"
17#include "armada_gem.h"
18
19static const struct fb_ops armada_fb_ops = {
20 .owner = THIS_MODULE,
21 DRM_FB_HELPER_DEFAULT_OPS,
22 .fb_read = drm_fb_helper_cfb_read,
23 .fb_write = drm_fb_helper_cfb_write,
24 .fb_fillrect = drm_fb_helper_cfb_fillrect,
25 .fb_copyarea = drm_fb_helper_cfb_copyarea,
26 .fb_imageblit = drm_fb_helper_cfb_imageblit,
27};
28
29static int armada_fbdev_create(struct drm_fb_helper *fbh,
30 struct drm_fb_helper_surface_size *sizes)
31{
32 struct drm_device *dev = fbh->dev;
33 struct drm_mode_fb_cmd2 mode;
34 struct armada_framebuffer *dfb;
35 struct armada_gem_object *obj;
36 struct fb_info *info;
37 int size, ret;
38 void *ptr;
39
40 memset(&mode, 0, sizeof(mode));
41 mode.width = sizes->surface_width;
42 mode.height = sizes->surface_height;
43 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
44 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
45 sizes->surface_depth);
46
47 size = mode.pitches[0] * mode.height;
48 obj = armada_gem_alloc_private_object(dev, size);
49 if (!obj) {
50 DRM_ERROR("failed to allocate fb memory\n");
51 return -ENOMEM;
52 }
53
54 ret = armada_gem_linear_back(dev, obj);
55 if (ret) {
56 drm_gem_object_put(&obj->obj);
57 return ret;
58 }
59
60 ptr = armada_gem_map_object(dev, obj);
61 if (!ptr) {
62 drm_gem_object_put(&obj->obj);
63 return -ENOMEM;
64 }
65
66 dfb = armada_framebuffer_create(dev, &mode, obj);
67
68 /*
69 * A reference is now held by the framebuffer object if
70 * successful, otherwise this drops the ref for the error path.
71 */
72 drm_gem_object_put(&obj->obj);
73
74 if (IS_ERR(dfb))
75 return PTR_ERR(dfb);
76
77 info = drm_fb_helper_alloc_info(fbh);
78 if (IS_ERR(info)) {
79 ret = PTR_ERR(info);
80 goto err_fballoc;
81 }
82
83 info->fbops = &armada_fb_ops;
84 info->fix.smem_start = obj->phys_addr;
85 info->fix.smem_len = obj->obj.size;
86 info->screen_size = obj->obj.size;
87 info->screen_base = ptr;
88 fbh->fb = &dfb->fb;
89
90 drm_fb_helper_fill_info(info, fbh, sizes);
91
92 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
93 dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
94 (unsigned long long)obj->phys_addr);
95
96 return 0;
97
98 err_fballoc:
99 dfb->fb.funcs->destroy(&dfb->fb);
100 return ret;
101}
102
103static int armada_fb_probe(struct drm_fb_helper *fbh,
104 struct drm_fb_helper_surface_size *sizes)
105{
106 int ret = 0;
107
108 if (!fbh->fb) {
109 ret = armada_fbdev_create(fbh, sizes);
110 if (ret == 0)
111 ret = 1;
112 }
113 return ret;
114}
115
116static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
117 .fb_probe = armada_fb_probe,
118};
119
120int armada_fbdev_init(struct drm_device *dev)
121{
122 struct armada_private *priv = drm_to_armada_dev(dev);
123 struct drm_fb_helper *fbh;
124 int ret;
125
126 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
127 if (!fbh)
128 return -ENOMEM;
129
130 priv->fbdev = fbh;
131
132 drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
133
134 ret = drm_fb_helper_init(dev, fbh);
135 if (ret) {
136 DRM_ERROR("failed to initialize drm fb helper\n");
137 goto err_fb_helper;
138 }
139
140 ret = drm_fb_helper_initial_config(fbh, 32);
141 if (ret) {
142 DRM_ERROR("failed to set initial config\n");
143 goto err_fb_setup;
144 }
145
146 return 0;
147 err_fb_setup:
148 drm_fb_helper_fini(fbh);
149 err_fb_helper:
150 priv->fbdev = NULL;
151 return ret;
152}
153
154void armada_fbdev_fini(struct drm_device *dev)
155{
156 struct armada_private *priv = drm_to_armada_dev(dev);
157 struct drm_fb_helper *fbh = priv->fbdev;
158
159 if (fbh) {
160 drm_fb_helper_unregister_info(fbh);
161
162 drm_fb_helper_fini(fbh);
163
164 if (fbh->fb)
165 fbh->fb->funcs->destroy(fbh->fb);
166
167 priv->fbdev = NULL;
168 }
169}