1 /*
2 * Copyright © 2007 David Airlie
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * David Airlie
25 */
26
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/string.h>
31 #include <linux/mm.h>
32 #include <linux/tty.h>
33 #include <linux/sysrq.h>
34 #include <linux/delay.h>
35 #include <linux/fb.h>
36 #include <linux/init.h>
37 #include <linux/vga_switcheroo.h>
38
39 #include "drmP.h"
40 #include "drm.h"
41 #include "drm_crtc.h"
42 #include "drm_fb_helper.h"
43 #include "intel_drv.h"
44 #include "i915_drm.h"
45 #include "i915_drv.h"
46
47 static struct fb_ops intelfb_ops = {
48 .owner = THIS_MODULE,
49 .fb_check_var = drm_fb_helper_check_var,
50 .fb_set_par = drm_fb_helper_set_par,
51 .fb_fillrect = cfb_fillrect,
52 .fb_copyarea = cfb_copyarea,
53 .fb_imageblit = cfb_imageblit,
54 .fb_pan_display = drm_fb_helper_pan_display,
55 .fb_blank = drm_fb_helper_blank,
56 .fb_setcmap = drm_fb_helper_setcmap,
57 .fb_debug_enter = drm_fb_helper_debug_enter,
58 .fb_debug_leave = drm_fb_helper_debug_leave,
59 };
60
intelfb_create(struct intel_fbdev * ifbdev,struct drm_fb_helper_surface_size * sizes)61 static int intelfb_create(struct intel_fbdev *ifbdev,
62 struct drm_fb_helper_surface_size *sizes)
63 {
64 struct drm_device *dev = ifbdev->helper.dev;
65 struct drm_i915_private *dev_priv = dev->dev_private;
66 struct fb_info *info;
67 struct drm_framebuffer *fb;
68 struct drm_mode_fb_cmd mode_cmd;
69 struct drm_i915_gem_object *obj;
70 struct device *device = &dev->pdev->dev;
71 int size, ret;
72
73 /* we don't do packed 24bpp */
74 if (sizes->surface_bpp == 24)
75 sizes->surface_bpp = 32;
76
77 mode_cmd.width = sizes->surface_width;
78 mode_cmd.height = sizes->surface_height;
79
80 mode_cmd.bpp = sizes->surface_bpp;
81 mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 7) / 8), 64);
82 mode_cmd.depth = sizes->surface_depth;
83
84 size = mode_cmd.pitch * mode_cmd.height;
85 size = ALIGN(size, PAGE_SIZE);
86 obj = i915_gem_alloc_object(dev, size);
87 if (!obj) {
88 DRM_ERROR("failed to allocate framebuffer\n");
89 ret = -ENOMEM;
90 goto out;
91 }
92
93 mutex_lock(&dev->struct_mutex);
94
95 /* Flush everything out, we'll be doing GTT only from now on */
96 ret = intel_pin_and_fence_fb_obj(dev, obj, false);
97 if (ret) {
98 DRM_ERROR("failed to pin fb: %d\n", ret);
99 goto out_unref;
100 }
101
102 info = framebuffer_alloc(0, device);
103 if (!info) {
104 ret = -ENOMEM;
105 goto out_unpin;
106 }
107
108 info->par = ifbdev;
109
110 ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
111 if (ret)
112 goto out_unpin;
113
114 fb = &ifbdev->ifb.base;
115
116 ifbdev->helper.fb = fb;
117 ifbdev->helper.fbdev = info;
118
119 strcpy(info->fix.id, "inteldrmfb");
120
121 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
122 info->fbops = &intelfb_ops;
123
124 ret = fb_alloc_cmap(&info->cmap, 256, 0);
125 if (ret) {
126 ret = -ENOMEM;
127 goto out_unpin;
128 }
129 /* setup aperture base/size for vesafb takeover */
130 info->apertures = alloc_apertures(1);
131 if (!info->apertures) {
132 ret = -ENOMEM;
133 goto out_unpin;
134 }
135 info->apertures->ranges[0].base = dev->mode_config.fb_base;
136 info->apertures->ranges[0].size =
137 dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
138
139 info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
140 info->fix.smem_len = size;
141
142 info->screen_base = ioremap_wc(dev->agp->base + obj->gtt_offset, size);
143 if (!info->screen_base) {
144 ret = -ENOSPC;
145 goto out_unpin;
146 }
147 info->screen_size = size;
148
149 // memset(info->screen_base, 0, size);
150
151 drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
152 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
153
154 info->pixmap.size = 64*1024;
155 info->pixmap.buf_align = 8;
156 info->pixmap.access_align = 32;
157 info->pixmap.flags = FB_PIXMAP_SYSTEM;
158 info->pixmap.scan_align = 1;
159
160 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
161 fb->width, fb->height,
162 obj->gtt_offset, obj);
163
164
165 mutex_unlock(&dev->struct_mutex);
166 vga_switcheroo_client_fb_set(dev->pdev, info);
167 return 0;
168
169 out_unpin:
170 i915_gem_object_unpin(obj);
171 out_unref:
172 drm_gem_object_unreference(&obj->base);
173 mutex_unlock(&dev->struct_mutex);
174 out:
175 return ret;
176 }
177
intel_fb_find_or_create_single(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)178 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
179 struct drm_fb_helper_surface_size *sizes)
180 {
181 struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
182 int new_fb = 0;
183 int ret;
184
185 if (!helper->fb) {
186 ret = intelfb_create(ifbdev, sizes);
187 if (ret)
188 return ret;
189 new_fb = 1;
190 }
191 return new_fb;
192 }
193
194 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
195 .gamma_set = intel_crtc_fb_gamma_set,
196 .gamma_get = intel_crtc_fb_gamma_get,
197 .fb_probe = intel_fb_find_or_create_single,
198 };
199
intel_fbdev_destroy(struct drm_device * dev,struct intel_fbdev * ifbdev)200 static void intel_fbdev_destroy(struct drm_device *dev,
201 struct intel_fbdev *ifbdev)
202 {
203 struct fb_info *info;
204 struct intel_framebuffer *ifb = &ifbdev->ifb;
205
206 if (ifbdev->helper.fbdev) {
207 info = ifbdev->helper.fbdev;
208 unregister_framebuffer(info);
209 iounmap(info->screen_base);
210 if (info->cmap.len)
211 fb_dealloc_cmap(&info->cmap);
212 framebuffer_release(info);
213 }
214
215 drm_fb_helper_fini(&ifbdev->helper);
216
217 drm_framebuffer_cleanup(&ifb->base);
218 if (ifb->obj) {
219 drm_gem_object_unreference_unlocked(&ifb->obj->base);
220 ifb->obj = NULL;
221 }
222 }
223
intel_fbdev_init(struct drm_device * dev)224 int intel_fbdev_init(struct drm_device *dev)
225 {
226 struct intel_fbdev *ifbdev;
227 drm_i915_private_t *dev_priv = dev->dev_private;
228 int ret;
229
230 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
231 if (!ifbdev)
232 return -ENOMEM;
233
234 dev_priv->fbdev = ifbdev;
235 ifbdev->helper.funcs = &intel_fb_helper_funcs;
236
237 ret = drm_fb_helper_init(dev, &ifbdev->helper,
238 dev_priv->num_pipe,
239 INTELFB_CONN_LIMIT);
240 if (ret) {
241 kfree(ifbdev);
242 return ret;
243 }
244
245 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
246 drm_fb_helper_initial_config(&ifbdev->helper, 32);
247 return 0;
248 }
249
intel_fbdev_fini(struct drm_device * dev)250 void intel_fbdev_fini(struct drm_device *dev)
251 {
252 drm_i915_private_t *dev_priv = dev->dev_private;
253 if (!dev_priv->fbdev)
254 return;
255
256 intel_fbdev_destroy(dev, dev_priv->fbdev);
257 kfree(dev_priv->fbdev);
258 dev_priv->fbdev = NULL;
259 }
260 MODULE_LICENSE("GPL and additional rights");
261
intel_fb_output_poll_changed(struct drm_device * dev)262 void intel_fb_output_poll_changed(struct drm_device *dev)
263 {
264 drm_i915_private_t *dev_priv = dev->dev_private;
265 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
266 }
267
intel_fb_restore_mode(struct drm_device * dev)268 void intel_fb_restore_mode(struct drm_device *dev)
269 {
270 int ret;
271 drm_i915_private_t *dev_priv = dev->dev_private;
272
273 ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
274 if (ret)
275 DRM_DEBUG("failed to restore crtc mode\n");
276 }
277