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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 = cfb_fillrect,
26 .fb_copyarea = cfb_copyarea,
27 .fb_imageblit = 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 = framebuffer_alloc(0, dev->dev);
84 if (!info) {
85 ret = -ENOMEM;
86 goto err_fballoc;
87 }
88
89 ret = fb_alloc_cmap(&info->cmap, 256, 0);
90 if (ret) {
91 ret = -ENOMEM;
92 goto err_fbcmap;
93 }
94
95 strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
96 info->par = fbh;
97 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
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->fb = &dfb->fb;
104 fbh->fbdev = info;
105 drm_fb_helper_fill_fix(info, dfb->fb.pitches[0], dfb->fb.depth);
106 drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
107
108 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
109 dfb->fb.width, dfb->fb.height, dfb->fb.bits_per_pixel,
110 (unsigned long long)obj->phys_addr);
111
112 return 0;
113
114 err_fbcmap:
115 framebuffer_release(info);
116 err_fballoc:
117 dfb->fb.funcs->destroy(&dfb->fb);
118 return ret;
119}
120
121static int armada_fb_probe(struct drm_fb_helper *fbh,
122 struct drm_fb_helper_surface_size *sizes)
123{
124 int ret = 0;
125
126 if (!fbh->fb) {
127 ret = armada_fb_create(fbh, sizes);
128 if (ret == 0)
129 ret = 1;
130 }
131 return ret;
132}
133
134static struct drm_fb_helper_funcs armada_fb_helper_funcs = {
135 .gamma_set = armada_drm_crtc_gamma_set,
136 .gamma_get = armada_drm_crtc_gamma_get,
137 .fb_probe = armada_fb_probe,
138};
139
140int armada_fbdev_init(struct drm_device *dev)
141{
142 struct armada_private *priv = dev->dev_private;
143 struct drm_fb_helper *fbh;
144 int ret;
145
146 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
147 if (!fbh)
148 return -ENOMEM;
149
150 priv->fbdev = fbh;
151
152 fbh->funcs = &armada_fb_helper_funcs;
153
154 ret = drm_fb_helper_init(dev, fbh, 1, 1);
155 if (ret) {
156 DRM_ERROR("failed to initialize drm fb helper\n");
157 goto err_fb_helper;
158 }
159
160 ret = drm_fb_helper_single_add_all_connectors(fbh);
161 if (ret) {
162 DRM_ERROR("failed to add fb connectors\n");
163 goto err_fb_setup;
164 }
165
166 ret = drm_fb_helper_initial_config(fbh, 32);
167 if (ret) {
168 DRM_ERROR("failed to set initial config\n");
169 goto err_fb_setup;
170 }
171
172 return 0;
173 err_fb_setup:
174 drm_fb_helper_fini(fbh);
175 err_fb_helper:
176 priv->fbdev = NULL;
177 return ret;
178}
179
180void armada_fbdev_lastclose(struct drm_device *dev)
181{
182 struct armada_private *priv = dev->dev_private;
183
184 drm_modeset_lock_all(dev);
185 if (priv->fbdev)
186 drm_fb_helper_restore_fbdev_mode(priv->fbdev);
187 drm_modeset_unlock_all(dev);
188}
189
190void armada_fbdev_fini(struct drm_device *dev)
191{
192 struct armada_private *priv = dev->dev_private;
193 struct drm_fb_helper *fbh = priv->fbdev;
194
195 if (fbh) {
196 struct fb_info *info = fbh->fbdev;
197
198 if (info) {
199 unregister_framebuffer(info);
200 if (info->cmap.len)
201 fb_dealloc_cmap(&info->cmap);
202 framebuffer_release(info);
203 }
204
205 drm_fb_helper_fini(fbh);
206
207 if (fbh->fb)
208 fbh->fb->funcs->destroy(fbh->fb);
209
210 priv->fbdev = NULL;
211 }
212}
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/drmP.h>
14#include <drm/drm_fb_helper.h>
15#include "armada_crtc.h"
16#include "armada_drm.h"
17#include "armada_fb.h"
18#include "armada_gem.h"
19
20static /*const*/ struct fb_ops armada_fb_ops = {
21 .owner = THIS_MODULE,
22 DRM_FB_HELPER_DEFAULT_OPS,
23 .fb_fillrect = drm_fb_helper_cfb_fillrect,
24 .fb_copyarea = drm_fb_helper_cfb_copyarea,
25 .fb_imageblit = drm_fb_helper_cfb_imageblit,
26};
27
28static int armada_fb_create(struct drm_fb_helper *fbh,
29 struct drm_fb_helper_surface_size *sizes)
30{
31 struct drm_device *dev = fbh->dev;
32 struct drm_mode_fb_cmd2 mode;
33 struct armada_framebuffer *dfb;
34 struct armada_gem_object *obj;
35 struct fb_info *info;
36 int size, ret;
37 void *ptr;
38
39 memset(&mode, 0, sizeof(mode));
40 mode.width = sizes->surface_width;
41 mode.height = sizes->surface_height;
42 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
43 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
44 sizes->surface_depth);
45
46 size = mode.pitches[0] * mode.height;
47 obj = armada_gem_alloc_private_object(dev, size);
48 if (!obj) {
49 DRM_ERROR("failed to allocate fb memory\n");
50 return -ENOMEM;
51 }
52
53 ret = armada_gem_linear_back(dev, obj);
54 if (ret) {
55 drm_gem_object_unreference_unlocked(&obj->obj);
56 return ret;
57 }
58
59 ptr = armada_gem_map_object(dev, obj);
60 if (!ptr) {
61 drm_gem_object_unreference_unlocked(&obj->obj);
62 return -ENOMEM;
63 }
64
65 dfb = armada_framebuffer_create(dev, &mode, obj);
66
67 /*
68 * A reference is now held by the framebuffer object if
69 * successful, otherwise this drops the ref for the error path.
70 */
71 drm_gem_object_unreference_unlocked(&obj->obj);
72
73 if (IS_ERR(dfb))
74 return PTR_ERR(dfb);
75
76 info = drm_fb_helper_alloc_fbi(fbh);
77 if (IS_ERR(info)) {
78 ret = PTR_ERR(info);
79 goto err_fballoc;
80 }
81
82 strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
83 info->par = fbh;
84 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
85 info->fbops = &armada_fb_ops;
86 info->fix.smem_start = obj->phys_addr;
87 info->fix.smem_len = obj->obj.size;
88 info->screen_size = obj->obj.size;
89 info->screen_base = ptr;
90 fbh->fb = &dfb->fb;
91
92 drm_fb_helper_fill_fix(info, dfb->fb.pitches[0], dfb->fb.depth);
93 drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
94
95 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
96 dfb->fb.width, dfb->fb.height, dfb->fb.bits_per_pixel,
97 (unsigned long long)obj->phys_addr);
98
99 return 0;
100
101 err_fballoc:
102 dfb->fb.funcs->destroy(&dfb->fb);
103 return ret;
104}
105
106static int armada_fb_probe(struct drm_fb_helper *fbh,
107 struct drm_fb_helper_surface_size *sizes)
108{
109 int ret = 0;
110
111 if (!fbh->fb) {
112 ret = armada_fb_create(fbh, sizes);
113 if (ret == 0)
114 ret = 1;
115 }
116 return ret;
117}
118
119static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
120 .gamma_set = armada_drm_crtc_gamma_set,
121 .gamma_get = armada_drm_crtc_gamma_get,
122 .fb_probe = armada_fb_probe,
123};
124
125int armada_fbdev_init(struct drm_device *dev)
126{
127 struct armada_private *priv = dev->dev_private;
128 struct drm_fb_helper *fbh;
129 int ret;
130
131 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
132 if (!fbh)
133 return -ENOMEM;
134
135 priv->fbdev = fbh;
136
137 drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
138
139 ret = drm_fb_helper_init(dev, fbh, 1, 1);
140 if (ret) {
141 DRM_ERROR("failed to initialize drm fb helper\n");
142 goto err_fb_helper;
143 }
144
145 ret = drm_fb_helper_single_add_all_connectors(fbh);
146 if (ret) {
147 DRM_ERROR("failed to add fb connectors\n");
148 goto err_fb_setup;
149 }
150
151 ret = drm_fb_helper_initial_config(fbh, 32);
152 if (ret) {
153 DRM_ERROR("failed to set initial config\n");
154 goto err_fb_setup;
155 }
156
157 return 0;
158 err_fb_setup:
159 drm_fb_helper_release_fbi(fbh);
160 drm_fb_helper_fini(fbh);
161 err_fb_helper:
162 priv->fbdev = NULL;
163 return ret;
164}
165
166void armada_fbdev_lastclose(struct drm_device *dev)
167{
168 struct armada_private *priv = dev->dev_private;
169
170 if (priv->fbdev)
171 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
172}
173
174void armada_fbdev_fini(struct drm_device *dev)
175{
176 struct armada_private *priv = dev->dev_private;
177 struct drm_fb_helper *fbh = priv->fbdev;
178
179 if (fbh) {
180 drm_fb_helper_unregister_fbi(fbh);
181 drm_fb_helper_release_fbi(fbh);
182
183 drm_fb_helper_fini(fbh);
184
185 if (fbh->fb)
186 fbh->fb->funcs->destroy(fbh->fb);
187
188 priv->fbdev = NULL;
189 }
190}