intel_fb.c revision 01f2c7730e188077026c5f766f85f329c7000c54 
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
47static 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
61static 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_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_alloc_object(dev, size);
88	if (!obj) {
89		DRM_ERROR("failed to allocate framebuffer\n");
90		ret = -ENOMEM;
91		goto out;
92	}
93
94	mutex_lock(&dev->struct_mutex);
95
96	/* Flush everything out, we'll be doing GTT only from now on */
97	ret = intel_pin_and_fence_fb_obj(dev, obj, false);
98	if (ret) {
99		DRM_ERROR("failed to pin fb: %d\n", ret);
100		goto out_unref;
101	}
102
103	info = framebuffer_alloc(0, device);
104	if (!info) {
105		ret = -ENOMEM;
106		goto out_unpin;
107	}
108
109	info->par = ifbdev;
110
111	ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
112	if (ret)
113		goto out_unpin;
114
115	fb = &ifbdev->ifb.base;
116
117	ifbdev->helper.fb = fb;
118	ifbdev->helper.fbdev = info;
119
120	strcpy(info->fix.id, "inteldrmfb");
121
122	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
123	info->fbops = &intelfb_ops;
124
125	ret = fb_alloc_cmap(&info->cmap, 256, 0);
126	if (ret) {
127		ret = -ENOMEM;
128		goto out_unpin;
129	}
130	/* setup aperture base/size for vesafb takeover */
131	info->apertures = alloc_apertures(1);
132	if (!info->apertures) {
133		ret = -ENOMEM;
134		goto out_unpin;
135	}
136	info->apertures->ranges[0].base = dev->mode_config.fb_base;
137	info->apertures->ranges[0].size =
138		dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
139
140	info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
141	info->fix.smem_len = size;
142
143	info->screen_base = ioremap_wc(dev->agp->base + obj->gtt_offset, size);
144	if (!info->screen_base) {
145		ret = -ENOSPC;
146		goto out_unpin;
147	}
148	info->screen_size = size;
149
150//	memset(info->screen_base, 0, size);
151
152	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
153	drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
154
155	info->pixmap.size = 64*1024;
156	info->pixmap.buf_align = 8;
157	info->pixmap.access_align = 32;
158	info->pixmap.flags = FB_PIXMAP_SYSTEM;
159	info->pixmap.scan_align = 1;
160
161	DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
162		      fb->width, fb->height,
163		      obj->gtt_offset, obj);
164
165
166	mutex_unlock(&dev->struct_mutex);
167	vga_switcheroo_client_fb_set(dev->pdev, info);
168	return 0;
169
170out_unpin:
171	i915_gem_object_unpin(obj);
172out_unref:
173	drm_gem_object_unreference(&obj->base);
174	mutex_unlock(&dev->struct_mutex);
175out:
176	return ret;
177}
178
179static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
180					  struct drm_fb_helper_surface_size *sizes)
181{
182	struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
183	int new_fb = 0;
184	int ret;
185
186	if (!helper->fb) {
187		ret = intelfb_create(ifbdev, sizes);
188		if (ret)
189			return ret;
190		new_fb = 1;
191	}
192	return new_fb;
193}
194
195static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
196	.gamma_set = intel_crtc_fb_gamma_set,
197	.gamma_get = intel_crtc_fb_gamma_get,
198	.fb_probe = intel_fb_find_or_create_single,
199};
200
201static void intel_fbdev_destroy(struct drm_device *dev,
202				struct intel_fbdev *ifbdev)
203{
204	struct fb_info *info;
205	struct intel_framebuffer *ifb = &ifbdev->ifb;
206
207	if (ifbdev->helper.fbdev) {
208		info = ifbdev->helper.fbdev;
209		unregister_framebuffer(info);
210		iounmap(info->screen_base);
211		if (info->cmap.len)
212			fb_dealloc_cmap(&info->cmap);
213		framebuffer_release(info);
214	}
215
216	drm_fb_helper_fini(&ifbdev->helper);
217
218	drm_framebuffer_cleanup(&ifb->base);
219	if (ifb->obj) {
220		drm_gem_object_unreference_unlocked(&ifb->obj->base);
221		ifb->obj = NULL;
222	}
223}
224
225int intel_fbdev_init(struct drm_device *dev)
226{
227	struct intel_fbdev *ifbdev;
228	drm_i915_private_t *dev_priv = dev->dev_private;
229	int ret;
230
231	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
232	if (!ifbdev)
233		return -ENOMEM;
234
235	dev_priv->fbdev = ifbdev;
236	ifbdev->helper.funcs = &intel_fb_helper_funcs;
237
238	ret = drm_fb_helper_init(dev, &ifbdev->helper,
239				 dev_priv->num_pipe,
240				 INTELFB_CONN_LIMIT);
241	if (ret) {
242		kfree(ifbdev);
243		return ret;
244	}
245
246	drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
247	drm_fb_helper_initial_config(&ifbdev->helper, 32);
248	return 0;
249}
250
251void 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}
261MODULE_LICENSE("GPL and additional rights");
262
263void intel_fb_output_poll_changed(struct drm_device *dev)
264{
265	drm_i915_private_t *dev_priv = dev->dev_private;
266	drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
267}
268
269void intel_fb_restore_mode(struct drm_device *dev)
270{
271	int ret;
272	drm_i915_private_t *dev_priv = dev->dev_private;
273
274	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
275	if (ret)
276		DRM_DEBUG("failed to restore crtc mode\n");
277}
278