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 <drm/drmP.h>
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_fb_helper.h>
42 #include "intel_drv.h"
43 #include <drm/i915_drm.h>
44 #include "i915_drv.h"
45
46 static struct fb_ops intelfb_ops = {
47 .owner = THIS_MODULE,
48 .fb_check_var = drm_fb_helper_check_var,
49 .fb_set_par = drm_fb_helper_set_par,
50 .fb_fillrect = cfb_fillrect,
51 .fb_copyarea = cfb_copyarea,
52 .fb_imageblit = cfb_imageblit,
53 .fb_pan_display = drm_fb_helper_pan_display,
54 .fb_blank = drm_fb_helper_blank,
55 .fb_setcmap = drm_fb_helper_setcmap,
56 .fb_debug_enter = drm_fb_helper_debug_enter,
57 .fb_debug_leave = drm_fb_helper_debug_leave,
58 };
59
intelfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)60 static int intelfb_create(struct drm_fb_helper *helper,
61 struct drm_fb_helper_surface_size *sizes)
62 {
63 struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
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_cmd2 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.pitches[0] = ALIGN(mode_cmd.width * ((sizes->surface_bpp + 7) /
81 8), 64);
82 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
83 sizes->surface_depth);
84
85 size = mode_cmd.pitches[0] * mode_cmd.height;
86 size = ALIGN(size, PAGE_SIZE);
87 obj = i915_gem_object_create_stolen(dev, size);
88 if (obj == NULL)
89 obj = i915_gem_alloc_object(dev, size);
90 if (!obj) {
91 DRM_ERROR("failed to allocate framebuffer\n");
92 ret = -ENOMEM;
93 goto out;
94 }
95
96 mutex_lock(&dev->struct_mutex);
97
98 /* Flush everything out, we'll be doing GTT only from now on */
99 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
100 if (ret) {
101 DRM_ERROR("failed to pin fb: %d\n", ret);
102 goto out_unref;
103 }
104
105 info = framebuffer_alloc(0, device);
106 if (!info) {
107 ret = -ENOMEM;
108 goto out_unpin;
109 }
110
111 info->par = ifbdev;
112
113 ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
114 if (ret)
115 goto out_unpin;
116
117 fb = &ifbdev->ifb.base;
118
119 ifbdev->helper.fb = fb;
120 ifbdev->helper.fbdev = info;
121
122 strcpy(info->fix.id, "inteldrmfb");
123
124 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
125 info->fbops = &intelfb_ops;
126
127 ret = fb_alloc_cmap(&info->cmap, 256, 0);
128 if (ret) {
129 ret = -ENOMEM;
130 goto out_unpin;
131 }
132 /* setup aperture base/size for vesafb takeover */
133 info->apertures = alloc_apertures(1);
134 if (!info->apertures) {
135 ret = -ENOMEM;
136 goto out_unpin;
137 }
138 info->apertures->ranges[0].base = dev->mode_config.fb_base;
139 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
140
141 info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
142 info->fix.smem_len = size;
143
144 info->screen_base =
145 ioremap_wc(dev_priv->gtt.mappable_base + obj->gtt_offset,
146 size);
147 if (!info->screen_base) {
148 ret = -ENOSPC;
149 goto out_unpin;
150 }
151 info->screen_size = size;
152
153 /* This driver doesn't need a VT switch to restore the mode on resume */
154 info->skip_vt_switch = true;
155
156 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
157 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
158
159 /* If the object is shmemfs backed, it will have given us zeroed pages.
160 * If the object is stolen however, it will be full of whatever
161 * garbage was left in there.
162 */
163 if (ifbdev->ifb.obj->stolen)
164 memset_io(info->screen_base, 0, info->screen_size);
165
166 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
167
168 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
169 fb->width, fb->height,
170 obj->gtt_offset, obj);
171
172
173 mutex_unlock(&dev->struct_mutex);
174 vga_switcheroo_client_fb_set(dev->pdev, info);
175 return 0;
176
177 out_unpin:
178 i915_gem_object_unpin(obj);
179 out_unref:
180 drm_gem_object_unreference(&obj->base);
181 mutex_unlock(&dev->struct_mutex);
182 out:
183 return ret;
184 }
185
186 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
187 .gamma_set = intel_crtc_fb_gamma_set,
188 .gamma_get = intel_crtc_fb_gamma_get,
189 .fb_probe = intelfb_create,
190 };
191
intel_fbdev_destroy(struct drm_device * dev,struct intel_fbdev * ifbdev)192 static void intel_fbdev_destroy(struct drm_device *dev,
193 struct intel_fbdev *ifbdev)
194 {
195 struct fb_info *info;
196 struct intel_framebuffer *ifb = &ifbdev->ifb;
197
198 if (ifbdev->helper.fbdev) {
199 info = ifbdev->helper.fbdev;
200 unregister_framebuffer(info);
201 iounmap(info->screen_base);
202 if (info->cmap.len)
203 fb_dealloc_cmap(&info->cmap);
204 framebuffer_release(info);
205 }
206
207 drm_fb_helper_fini(&ifbdev->helper);
208
209 drm_framebuffer_unregister_private(&ifb->base);
210 drm_framebuffer_cleanup(&ifb->base);
211 if (ifb->obj) {
212 drm_gem_object_unreference_unlocked(&ifb->obj->base);
213 ifb->obj = NULL;
214 }
215 }
216
intel_fbdev_init(struct drm_device * dev)217 int intel_fbdev_init(struct drm_device *dev)
218 {
219 struct intel_fbdev *ifbdev;
220 drm_i915_private_t *dev_priv = dev->dev_private;
221 int ret;
222
223 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
224 if (!ifbdev)
225 return -ENOMEM;
226
227 dev_priv->fbdev = ifbdev;
228 ifbdev->helper.funcs = &intel_fb_helper_funcs;
229
230 ret = drm_fb_helper_init(dev, &ifbdev->helper,
231 INTEL_INFO(dev)->num_pipes,
232 INTELFB_CONN_LIMIT);
233 if (ret) {
234 kfree(ifbdev);
235 return ret;
236 }
237
238 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
239
240 return 0;
241 }
242
intel_fbdev_initial_config(struct drm_device * dev)243 void intel_fbdev_initial_config(struct drm_device *dev)
244 {
245 drm_i915_private_t *dev_priv = dev->dev_private;
246
247 /* Due to peculiar init order wrt to hpd handling this is separate. */
248 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
249 }
250
intel_fbdev_fini(struct drm_device * dev)251 void intel_fbdev_fini(struct drm_device *dev)
252 {
253 drm_i915_private_t *dev_priv = dev->dev_private;
254 if (!dev_priv->fbdev)
255 return;
256
257 intel_fbdev_destroy(dev, dev_priv->fbdev);
258 kfree(dev_priv->fbdev);
259 dev_priv->fbdev = NULL;
260 }
261
intel_fbdev_set_suspend(struct drm_device * dev,int state)262 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
263 {
264 drm_i915_private_t *dev_priv = dev->dev_private;
265 struct intel_fbdev *ifbdev = dev_priv->fbdev;
266 struct fb_info *info;
267
268 if (!ifbdev)
269 return;
270
271 info = ifbdev->helper.fbdev;
272
273 /* On resume from hibernation: If the object is shmemfs backed, it has
274 * been restored from swap. If the object is stolen however, it will be
275 * full of whatever garbage was left in there.
276 */
277 if (!state && ifbdev->ifb.obj->stolen)
278 memset_io(info->screen_base, 0, info->screen_size);
279
280 fb_set_suspend(info, state);
281 }
282
283 MODULE_LICENSE("GPL and additional rights");
284
intel_fb_output_poll_changed(struct drm_device * dev)285 void intel_fb_output_poll_changed(struct drm_device *dev)
286 {
287 drm_i915_private_t *dev_priv = dev->dev_private;
288 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
289 }
290
intel_fb_restore_mode(struct drm_device * dev)291 void intel_fb_restore_mode(struct drm_device *dev)
292 {
293 int ret;
294 drm_i915_private_t *dev_priv = dev->dev_private;
295 struct drm_mode_config *config = &dev->mode_config;
296 struct drm_plane *plane;
297
298 if (INTEL_INFO(dev)->num_pipes == 0)
299 return;
300
301 drm_modeset_lock_all(dev);
302
303 ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
304 if (ret)
305 DRM_DEBUG("failed to restore crtc mode\n");
306
307 /* Be sure to shut off any planes that may be active */
308 list_for_each_entry(plane, &config->plane_list, head)
309 if (plane->enabled)
310 plane->funcs->disable_plane(plane);
311
312 drm_modeset_unlock_all(dev);
313 }
314