Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
[pandora-kernel.git] / drivers / gpu / drm / i915 / intel_fb.c
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/slab.h>
34 #include <linux/sysrq.h>
35 #include <linux/delay.h>
36 #include <linux/fb.h>
37 #include <linux/init.h>
38 #include <linux/vga_switcheroo.h>
39
40 #include "drmP.h"
41 #include "drm.h"
42 #include "drm_crtc.h"
43 #include "drm_fb_helper.h"
44 #include "intel_drv.h"
45 #include "i915_drm.h"
46 #include "i915_drv.h"
47
48 struct intelfb_par {
49         struct drm_fb_helper helper;
50         struct intel_framebuffer *intel_fb;
51         struct drm_display_mode *our_mode;
52 };
53
54 static struct fb_ops intelfb_ops = {
55         .owner = THIS_MODULE,
56         .fb_check_var = drm_fb_helper_check_var,
57         .fb_set_par = drm_fb_helper_set_par,
58         .fb_setcolreg = drm_fb_helper_setcolreg,
59         .fb_fillrect = cfb_fillrect,
60         .fb_copyarea = cfb_copyarea,
61         .fb_imageblit = cfb_imageblit,
62         .fb_pan_display = drm_fb_helper_pan_display,
63         .fb_blank = drm_fb_helper_blank,
64         .fb_setcmap = drm_fb_helper_setcmap,
65 };
66
67 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
68         .gamma_set = intel_crtc_fb_gamma_set,
69         .gamma_get = intel_crtc_fb_gamma_get,
70 };
71
72
73 /**
74  * Currently it is assumed that the old framebuffer is reused.
75  *
76  * LOCKING
77  * caller should hold the mode config lock.
78  *
79  */
80 int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
81 {
82         struct fb_info *info;
83         struct drm_framebuffer *fb;
84         struct drm_display_mode *mode = crtc->desired_mode;
85
86         fb = crtc->fb;
87         if (!fb)
88                 return 1;
89
90         info = fb->fbdev;
91         if (!info)
92                 return 1;
93
94         if (!mode)
95                 return 1;
96
97         info->var.xres = mode->hdisplay;
98         info->var.right_margin = mode->hsync_start - mode->hdisplay;
99         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
100         info->var.left_margin = mode->htotal - mode->hsync_end;
101         info->var.yres = mode->vdisplay;
102         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
103         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
104         info->var.upper_margin = mode->vtotal - mode->vsync_end;
105         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
106         /* avoid overflow */
107         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
108
109         return 0;
110 }
111 EXPORT_SYMBOL(intelfb_resize);
112
113 static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
114                           uint32_t fb_height, uint32_t surface_width,
115                           uint32_t surface_height,
116                           uint32_t surface_depth, uint32_t surface_bpp,
117                           struct drm_framebuffer **fb_p)
118 {
119         struct fb_info *info;
120         struct intelfb_par *par;
121         struct drm_framebuffer *fb;
122         struct intel_framebuffer *intel_fb;
123         struct drm_mode_fb_cmd mode_cmd;
124         struct drm_gem_object *fbo = NULL;
125         struct drm_i915_gem_object *obj_priv;
126         struct device *device = &dev->pdev->dev;
127         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
128
129         /* we don't do packed 24bpp */
130         if (surface_bpp == 24)
131                 surface_bpp = 32;
132
133         mode_cmd.width = surface_width;
134         mode_cmd.height = surface_height;
135
136         mode_cmd.bpp = surface_bpp;
137         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
138         mode_cmd.depth = surface_depth;
139
140         size = mode_cmd.pitch * mode_cmd.height;
141         size = ALIGN(size, PAGE_SIZE);
142         fbo = drm_gem_object_alloc(dev, size);
143         if (!fbo) {
144                 DRM_ERROR("failed to allocate framebuffer\n");
145                 ret = -ENOMEM;
146                 goto out;
147         }
148         obj_priv = fbo->driver_private;
149
150         mutex_lock(&dev->struct_mutex);
151
152         ret = i915_gem_object_pin(fbo, 64*1024);
153         if (ret) {
154                 DRM_ERROR("failed to pin fb: %d\n", ret);
155                 goto out_unref;
156         }
157
158         /* Flush everything out, we'll be doing GTT only from now on */
159         i915_gem_object_set_to_gtt_domain(fbo, 1);
160
161         ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
162         if (ret) {
163                 DRM_ERROR("failed to allocate fb.\n");
164                 goto out_unpin;
165         }
166
167         list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
168
169         intel_fb = to_intel_framebuffer(fb);
170         *fb_p = fb;
171
172         info = framebuffer_alloc(sizeof(struct intelfb_par), device);
173         if (!info) {
174                 ret = -ENOMEM;
175                 goto out_unpin;
176         }
177
178         par = info->par;
179
180         par->helper.funcs = &intel_fb_helper_funcs;
181         par->helper.dev = dev;
182         ret = drm_fb_helper_init_crtc_count(&par->helper, 2,
183                                             INTELFB_CONN_LIMIT);
184         if (ret)
185                 goto out_unref;
186
187         strcpy(info->fix.id, "inteldrmfb");
188
189         info->flags = FBINFO_DEFAULT;
190
191         info->fbops = &intelfb_ops;
192
193
194         /* setup aperture base/size for vesafb takeover */
195         info->aperture_base = dev->mode_config.fb_base;
196         if (IS_I9XX(dev))
197                 info->aperture_size = pci_resource_len(dev->pdev, 2);
198         else
199                 info->aperture_size = pci_resource_len(dev->pdev, 0);
200
201         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
202         info->fix.smem_len = size;
203
204         info->flags = FBINFO_DEFAULT;
205
206         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
207                                        size);
208         if (!info->screen_base) {
209                 ret = -ENOSPC;
210                 goto out_unpin;
211         }
212         info->screen_size = size;
213
214 //      memset(info->screen_base, 0, size);
215
216         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
217         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
218
219         /* FIXME: we really shouldn't expose mmio space at all */
220         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
221         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
222
223         info->pixmap.size = 64*1024;
224         info->pixmap.buf_align = 8;
225         info->pixmap.access_align = 32;
226         info->pixmap.flags = FB_PIXMAP_SYSTEM;
227         info->pixmap.scan_align = 1;
228
229         fb->fbdev = info;
230
231         par->intel_fb = intel_fb;
232
233         /* To allow resizeing without swapping buffers */
234         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
235                         intel_fb->base.width, intel_fb->base.height,
236                         obj_priv->gtt_offset, fbo);
237
238         mutex_unlock(&dev->struct_mutex);
239         vga_switcheroo_client_fb_set(dev->pdev, info);
240         return 0;
241
242 out_unpin:
243         i915_gem_object_unpin(fbo);
244 out_unref:
245         drm_gem_object_unreference(fbo);
246         mutex_unlock(&dev->struct_mutex);
247 out:
248         return ret;
249 }
250
251 int intelfb_probe(struct drm_device *dev)
252 {
253         int ret;
254
255         DRM_DEBUG_KMS("\n");
256         ret = drm_fb_helper_single_fb_probe(dev, 32, intelfb_create);
257         return ret;
258 }
259 EXPORT_SYMBOL(intelfb_probe);
260
261 int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
262 {
263         struct fb_info *info;
264
265         if (!fb)
266                 return -EINVAL;
267
268         info = fb->fbdev;
269
270         if (info) {
271                 struct intelfb_par *par = info->par;
272                 unregister_framebuffer(info);
273                 iounmap(info->screen_base);
274                 if (info->par)
275                         drm_fb_helper_free(&par->helper);
276                 framebuffer_release(info);
277         }
278
279         return 0;
280 }
281 EXPORT_SYMBOL(intelfb_remove);
282 MODULE_LICENSE("GPL and additional rights");