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1/*
2 * Copyright (C) 2012 Russell King
3 * Written from the i915 driver.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9#include <linux/errno.h>
10#include <linux/fb.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13
14#include <drm/drmP.h>
15#include <drm/drm_fb_helper.h>
16#include "armada_crtc.h"
17#include "armada_drm.h"
18#include "armada_fb.h"
19#include "armada_gem.h"
20
21static /*const*/ struct fb_ops armada_fb_ops = {
22 .owner = THIS_MODULE,
23 .fb_check_var = drm_fb_helper_check_var,
24 .fb_set_par = drm_fb_helper_set_par,
25 .fb_fillrect = drm_fb_helper_cfb_fillrect,
26 .fb_copyarea = drm_fb_helper_cfb_copyarea,
27 .fb_imageblit = drm_fb_helper_cfb_imageblit,
28 .fb_pan_display = drm_fb_helper_pan_display,
29 .fb_blank = drm_fb_helper_blank,
30 .fb_setcmap = drm_fb_helper_setcmap,
31 .fb_debug_enter = drm_fb_helper_debug_enter,
32 .fb_debug_leave = drm_fb_helper_debug_leave,
33};
34
35static int armada_fb_create(struct drm_fb_helper *fbh,
36 struct drm_fb_helper_surface_size *sizes)
37{
38 struct drm_device *dev = fbh->dev;
39 struct drm_mode_fb_cmd2 mode;
40 struct armada_framebuffer *dfb;
41 struct armada_gem_object *obj;
42 struct fb_info *info;
43 int size, ret;
44 void *ptr;
45
46 memset(&mode, 0, sizeof(mode));
47 mode.width = sizes->surface_width;
48 mode.height = sizes->surface_height;
49 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
50 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
51 sizes->surface_depth);
52
53 size = mode.pitches[0] * mode.height;
54 obj = armada_gem_alloc_private_object(dev, size);
55 if (!obj) {
56 DRM_ERROR("failed to allocate fb memory\n");
57 return -ENOMEM;
58 }
59
60 ret = armada_gem_linear_back(dev, obj);
61 if (ret) {
62 drm_gem_object_unreference_unlocked(&obj->obj);
63 return ret;
64 }
65
66 ptr = armada_gem_map_object(dev, obj);
67 if (!ptr) {
68 drm_gem_object_unreference_unlocked(&obj->obj);
69 return -ENOMEM;
70 }
71
72 dfb = armada_framebuffer_create(dev, &mode, obj);
73
74 /*
75 * A reference is now held by the framebuffer object if
76 * successful, otherwise this drops the ref for the error path.
77 */
78 drm_gem_object_unreference_unlocked(&obj->obj);
79
80 if (IS_ERR(dfb))
81 return PTR_ERR(dfb);
82
83 info = drm_fb_helper_alloc_fbi(fbh);
84 if (IS_ERR(info)) {
85 ret = PTR_ERR(info);
86 goto err_fballoc;
87 }
88
89 strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
90 info->par = fbh;
91 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
92 info->fbops = &armada_fb_ops;
93 info->fix.smem_start = obj->phys_addr;
94 info->fix.smem_len = obj->obj.size;
95 info->screen_size = obj->obj.size;
96 info->screen_base = ptr;
97 fbh->fb = &dfb->fb;
98
99 drm_fb_helper_fill_fix(info, dfb->fb.pitches[0], dfb->fb.depth);
100 drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
101
102 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
103 dfb->fb.width, dfb->fb.height, dfb->fb.bits_per_pixel,
104 (unsigned long long)obj->phys_addr);
105
106 return 0;
107
108 err_fballoc:
109 dfb->fb.funcs->destroy(&dfb->fb);
110 return ret;
111}
112
113static int armada_fb_probe(struct drm_fb_helper *fbh,
114 struct drm_fb_helper_surface_size *sizes)
115{
116 int ret = 0;
117
118 if (!fbh->fb) {
119 ret = armada_fb_create(fbh, sizes);
120 if (ret == 0)
121 ret = 1;
122 }
123 return ret;
124}
125
126static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
127 .gamma_set = armada_drm_crtc_gamma_set,
128 .gamma_get = armada_drm_crtc_gamma_get,
129 .fb_probe = armada_fb_probe,
130};
131
132int armada_fbdev_init(struct drm_device *dev)
133{
134 struct armada_private *priv = dev->dev_private;
135 struct drm_fb_helper *fbh;
136 int ret;
137
138 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
139 if (!fbh)
140 return -ENOMEM;
141
142 priv->fbdev = fbh;
143
144 drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
145
146 ret = drm_fb_helper_init(dev, fbh, 1, 1);
147 if (ret) {
148 DRM_ERROR("failed to initialize drm fb helper\n");
149 goto err_fb_helper;
150 }
151
152 ret = drm_fb_helper_single_add_all_connectors(fbh);
153 if (ret) {
154 DRM_ERROR("failed to add fb connectors\n");
155 goto err_fb_setup;
156 }
157
158 ret = drm_fb_helper_initial_config(fbh, 32);
159 if (ret) {
160 DRM_ERROR("failed to set initial config\n");
161 goto err_fb_setup;
162 }
163
164 return 0;
165 err_fb_setup:
166 drm_fb_helper_release_fbi(fbh);
167 drm_fb_helper_fini(fbh);
168 err_fb_helper:
169 priv->fbdev = NULL;
170 return ret;
171}
172
173void armada_fbdev_lastclose(struct drm_device *dev)
174{
175 struct armada_private *priv = dev->dev_private;
176
177 if (priv->fbdev)
178 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
179}
180
181void armada_fbdev_fini(struct drm_device *dev)
182{
183 struct armada_private *priv = dev->dev_private;
184 struct drm_fb_helper *fbh = priv->fbdev;
185
186 if (fbh) {
187 drm_fb_helper_unregister_fbi(fbh);
188 drm_fb_helper_release_fbi(fbh);
189
190 drm_fb_helper_fini(fbh);
191
192 if (fbh->fb)
193 fbh->fb->funcs->destroy(fbh->fb);
194
195 priv->fbdev = NULL;
196 }
197}
1/*
2 * Copyright (C) 2012 Russell King
3 * Written from the i915 driver.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9#include <linux/errno.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12
13#include <drm/drm_fb_helper.h>
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_fillrect = drm_fb_helper_cfb_fillrect,
23 .fb_copyarea = drm_fb_helper_cfb_copyarea,
24 .fb_imageblit = drm_fb_helper_cfb_imageblit,
25};
26
27static int armada_fb_create(struct drm_fb_helper *fbh,
28 struct drm_fb_helper_surface_size *sizes)
29{
30 struct drm_device *dev = fbh->dev;
31 struct drm_mode_fb_cmd2 mode;
32 struct armada_framebuffer *dfb;
33 struct armada_gem_object *obj;
34 struct fb_info *info;
35 int size, ret;
36 void *ptr;
37
38 memset(&mode, 0, sizeof(mode));
39 mode.width = sizes->surface_width;
40 mode.height = sizes->surface_height;
41 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
42 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
43 sizes->surface_depth);
44
45 size = mode.pitches[0] * mode.height;
46 obj = armada_gem_alloc_private_object(dev, size);
47 if (!obj) {
48 DRM_ERROR("failed to allocate fb memory\n");
49 return -ENOMEM;
50 }
51
52 ret = armada_gem_linear_back(dev, obj);
53 if (ret) {
54 drm_gem_object_put_unlocked(&obj->obj);
55 return ret;
56 }
57
58 ptr = armada_gem_map_object(dev, obj);
59 if (!ptr) {
60 drm_gem_object_put_unlocked(&obj->obj);
61 return -ENOMEM;
62 }
63
64 dfb = armada_framebuffer_create(dev, &mode, obj);
65
66 /*
67 * A reference is now held by the framebuffer object if
68 * successful, otherwise this drops the ref for the error path.
69 */
70 drm_gem_object_put_unlocked(&obj->obj);
71
72 if (IS_ERR(dfb))
73 return PTR_ERR(dfb);
74
75 info = drm_fb_helper_alloc_fbi(fbh);
76 if (IS_ERR(info)) {
77 ret = PTR_ERR(info);
78 goto err_fballoc;
79 }
80
81 strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
82 info->par = fbh;
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_fix(info, dfb->fb.pitches[0],
91 dfb->fb.format->depth);
92 drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
93
94 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
95 dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
96 (unsigned long long)obj->phys_addr);
97
98 return 0;
99
100 err_fballoc:
101 dfb->fb.funcs->destroy(&dfb->fb);
102 return ret;
103}
104
105static int armada_fb_probe(struct drm_fb_helper *fbh,
106 struct drm_fb_helper_surface_size *sizes)
107{
108 int ret = 0;
109
110 if (!fbh->fb) {
111 ret = armada_fb_create(fbh, sizes);
112 if (ret == 0)
113 ret = 1;
114 }
115 return ret;
116}
117
118static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
119 .fb_probe = armada_fb_probe,
120};
121
122int armada_fbdev_init(struct drm_device *dev)
123{
124 struct armada_private *priv = dev->dev_private;
125 struct drm_fb_helper *fbh;
126 int ret;
127
128 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
129 if (!fbh)
130 return -ENOMEM;
131
132 priv->fbdev = fbh;
133
134 drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
135
136 ret = drm_fb_helper_init(dev, fbh, 1);
137 if (ret) {
138 DRM_ERROR("failed to initialize drm fb helper\n");
139 goto err_fb_helper;
140 }
141
142 ret = drm_fb_helper_single_add_all_connectors(fbh);
143 if (ret) {
144 DRM_ERROR("failed to add fb connectors\n");
145 goto err_fb_setup;
146 }
147
148 ret = drm_fb_helper_initial_config(fbh, 32);
149 if (ret) {
150 DRM_ERROR("failed to set initial config\n");
151 goto err_fb_setup;
152 }
153
154 return 0;
155 err_fb_setup:
156 drm_fb_helper_fini(fbh);
157 err_fb_helper:
158 priv->fbdev = NULL;
159 return ret;
160}
161
162void armada_fbdev_fini(struct drm_device *dev)
163{
164 struct armada_private *priv = dev->dev_private;
165 struct drm_fb_helper *fbh = priv->fbdev;
166
167 if (fbh) {
168 drm_fb_helper_unregister_fbi(fbh);
169
170 drm_fb_helper_fini(fbh);
171
172 if (fbh->fb)
173 fbh->fb->funcs->destroy(fbh->fb);
174
175 priv->fbdev = NULL;
176 }
177}