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/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
  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 fb_info *info;
  66         struct drm_framebuffer *fb;
  67         struct drm_mode_fb_cmd mode_cmd;
  68         struct drm_gem_object *fbo = NULL;
  69         struct drm_i915_gem_object *obj_priv;
  70         struct device *device = &dev->pdev->dev;
  71         int size, ret, mmio_bar = IS_GEN2(dev) ? 1 : 0;
  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 + 1) / 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         fbo = i915_gem_alloc_object(dev, size);
  87         if (!fbo) {
  88                 DRM_ERROR("failed to allocate framebuffer\n");
  89                 ret = -ENOMEM;
  90                 goto out;
  91         }
  92         obj_priv = to_intel_bo(fbo);
  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, fbo, 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, fbo);
 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         /* setup aperture base/size for vesafb takeover */
 126         info->apertures = alloc_apertures(1);
 127         if (!info->apertures) {
 128                 ret = -ENOMEM;
 129                 goto out_unpin;
 130         }
 131         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 132         if (!IS_GEN2(dev))
 133                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 2);
 134         else
 135                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 136
 137         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 138         info->fix.smem_len = size;
 139
 140         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 141                                        size);
 142         if (!info->screen_base) {
 143                 ret = -ENOSPC;
 144                 goto out_unpin;
 145         }
 146
 147         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 148         if (ret) {
 149                 ret = -ENOMEM;
 150                 goto out_unpin;
 151         }
 152         info->screen_size = size;
 153
 154 //      memset(info->screen_base, 0, size);
 155
 156         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 157         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 158
 159         /* FIXME: we really shouldn't expose mmio space at all */
 160         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 161         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 162
 163         info->pixmap.size = 64*1024;
 164         info->pixmap.buf_align = 8;
 165         info->pixmap.access_align = 32;
 166         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 167         info->pixmap.scan_align = 1;
 168
 169         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 170                       fb->width, fb->height,
 171                       obj_priv->gtt_offset, fbo);
 172
 173
 174         mutex_unlock(&dev->struct_mutex);
 175         vga_switcheroo_client_fb_set(dev->pdev, info);
 176         return 0;
 177
 178 out_unpin:
 179         i915_gem_object_unpin(fbo);
 180 out_unref:
 181         drm_gem_object_unreference(fbo);
 182         mutex_unlock(&dev->struct_mutex);
 183 out:
 184         return ret;
 185 }
 186
 187 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 188                                           struct drm_fb_helper_surface_size *sizes)
 189 {
 190         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 191         int new_fb = 0;
 192         int ret;
 193
 194         if (!helper->fb) {
 195                 ret = intelfb_create(ifbdev, sizes);
 196                 if (ret)
 197                         return ret;
 198                 new_fb = 1;
 199         }
 200         return new_fb;
 201 }
 202
 203 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 204         .gamma_set = intel_crtc_fb_gamma_set,
 205         .gamma_get = intel_crtc_fb_gamma_get,
 206         .fb_probe = intel_fb_find_or_create_single,
 207 };
 208
 209 static void intel_fbdev_destroy(struct drm_device *dev,
 210                                 struct intel_fbdev *ifbdev)
 211 {
 212         struct fb_info *info;
 213         struct intel_framebuffer *ifb = &ifbdev->ifb;
 214
 215         if (ifbdev->helper.fbdev) {
 216                 info = ifbdev->helper.fbdev;
 217                 unregister_framebuffer(info);
 218                 iounmap(info->screen_base);
 219                 if (info->cmap.len)
 220                         fb_dealloc_cmap(&info->cmap);
 221                 framebuffer_release(info);
 222         }
 223
 224         drm_fb_helper_fini(&ifbdev->helper);
 225
 226         drm_framebuffer_cleanup(&ifb->base);
 227         if (ifb->obj) {
 228                 drm_gem_object_unreference_unlocked(ifb->obj);
 229                 ifb->obj = NULL;
 230         }
 231 }
 232
 233 int intel_fbdev_init(struct drm_device *dev)
 234 {
 235         struct intel_fbdev *ifbdev;
 236         drm_i915_private_t *dev_priv = dev->dev_private;
 237         int ret;
 238
 239         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 240         if (!ifbdev)
 241                 return -ENOMEM;
 242
 243         dev_priv->fbdev = ifbdev;
 244         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 245
 246         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 247                                  dev_priv->num_pipe,
 248                                  INTELFB_CONN_LIMIT);
 249         if (ret) {
 250                 kfree(ifbdev);
 251                 return ret;
 252         }
 253
 254         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 255         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 256         return 0;
 257 }
 258
 259 void intel_fbdev_fini(struct drm_device *dev)
 260 {
 261         drm_i915_private_t *dev_priv = dev->dev_private;
 262         if (!dev_priv->fbdev)
 263                 return;
 264
 265         intel_fbdev_destroy(dev, dev_priv->fbdev);
 266         kfree(dev_priv->fbdev);
 267         dev_priv->fbdev = NULL;
 268 }
 269 MODULE_LICENSE("GPL and additional rights");
 270
 271 void intel_fb_output_poll_changed(struct drm_device *dev)
 272 {
 273         drm_i915_private_t *dev_priv = dev->dev_private;
 274         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 275 }