drivers/gpu/drm/i915/intel_fbdev.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 <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
  60 static int intelfb_alloc(struct drm_fb_helper *helper,
  61                          struct drm_fb_helper_surface_size *sizes)
  62 {
  63         struct intel_fbdev *ifbdev =
  64                 container_of(helper, struct intel_fbdev, helper);
  65         struct drm_device *dev = helper->dev;
  66         struct drm_mode_fb_cmd2 mode_cmd = {};
  67         struct drm_i915_gem_object *obj;
  68         int size, ret;
  69
  70         /* we don't do packed 24bpp */
  71         if (sizes->surface_bpp == 24)
  72                 sizes->surface_bpp = 32;
  73
  74         mode_cmd.width = sizes->surface_width;
  75         mode_cmd.height = sizes->surface_height;
  76
  77         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
  78                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
  79         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  80                                                           sizes->surface_depth);
  81
  82         size = mode_cmd.pitches[0] * mode_cmd.height;
  83         size = ALIGN(size, PAGE_SIZE);
  84         obj = i915_gem_object_create_stolen(dev, size);
  85         if (obj == NULL)
  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         /* Flush everything out, we'll be doing GTT only from now on */
  94         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
  95         if (ret) {
  96                 DRM_ERROR("failed to pin fb: %d\n", ret);
  97                 goto out_unref;
  98         }
  99
 100         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
 101         if (ret)
 102                 goto out_unpin;
 103
 104         return 0;
 105
 106 out_unpin:
 107         i915_gem_object_unpin(obj);
 108 out_unref:
 109         drm_gem_object_unreference(&obj->base);
 110 out:
 111         return ret;
 112 }
 113
 114 static int intelfb_create(struct drm_fb_helper *helper,
 115                           struct drm_fb_helper_surface_size *sizes)
 116 {
 117         struct intel_fbdev *ifbdev =
 118                 container_of(helper, struct intel_fbdev, helper);
 119         struct intel_framebuffer *intel_fb = &ifbdev->ifb;
 120         struct drm_device *dev = helper->dev;
 121         struct drm_i915_private *dev_priv = dev->dev_private;
 122         struct fb_info *info;
 123         struct drm_framebuffer *fb;
 124         struct drm_i915_gem_object *obj;
 125         int size, ret;
 126
 127         mutex_lock(&dev->struct_mutex);
 128
 129         if (!intel_fb->obj) {
 130                 DRM_ERROR("no BIOS fb, allocating a new one\n");
 131                 ret = intelfb_alloc(helper, sizes);
 132                 if (ret)
 133                         goto out_unlock;
 134         } else {
 135                 sizes->fb_width = intel_fb->base.width;
 136                 sizes->fb_height = intel_fb->base.height;
 137         }
 138
 139         obj = intel_fb->obj;
 140         size = obj->base.size;
 141
 142         info = framebuffer_alloc(0, &dev->pdev->dev);
 143         if (!info) {
 144                 ret = -ENOMEM;
 145                 goto out_unpin;
 146         }
 147
 148         info->par = helper;
 149
 150         fb = &ifbdev->ifb.base;
 151
 152         ifbdev->helper.fb = fb;
 153         ifbdev->helper.fbdev = info;
 154
 155         strcpy(info->fix.id, "inteldrmfb");
 156
 157         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 158         info->fbops = &intelfb_ops;
 159
 160         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 161         if (ret) {
 162                 ret = -ENOMEM;
 163                 goto out_unpin;
 164         }
 165         /* setup aperture base/size for vesafb takeover */
 166         info->apertures = alloc_apertures(1);
 167         if (!info->apertures) {
 168                 ret = -ENOMEM;
 169                 goto out_unpin;
 170         }
 171         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 172         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 173
 174         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 175         info->fix.smem_len = size;
 176
 177         info->screen_base =
 178                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 179                            size);
 180         if (!info->screen_base) {
 181                 ret = -ENOSPC;
 182                 goto out_unpin;
 183         }
 184         info->screen_size = size;
 185
 186         /* This driver doesn't need a VT switch to restore the mode on resume */
 187         info->skip_vt_switch = true;
 188
 189         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 190         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 191
 192         /* If the object is shmemfs backed, it will have given us zeroed pages.
 193          * If the object is stolen however, it will be full of whatever
 194          * garbage was left in there.
 195          */
 196         if (ifbdev->ifb.obj->stolen)
 197                 memset_io(info->screen_base, 0, info->screen_size);
 198
 199         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 200
 201         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 202                       fb->width, fb->height,
 203                       i915_gem_obj_ggtt_offset(obj), obj);
 204
 205         mutex_unlock(&dev->struct_mutex);
 206         vga_switcheroo_client_fb_set(dev->pdev, info);
 207         return 0;
 208
 209 out_unpin:
 210         i915_gem_object_unpin(obj);
 211         drm_gem_object_unreference(&obj->base);
 212 out_unlock:
 213         mutex_unlock(&dev->struct_mutex);
 214         return ret;
 215 }
 216
 217 /** Sets the color ramps on behalf of RandR */
 218 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 219                                     u16 blue, int regno)
 220 {
 221         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 222
 223         intel_crtc->lut_r[regno] = red >> 8;
 224         intel_crtc->lut_g[regno] = green >> 8;
 225         intel_crtc->lut_b[regno] = blue >> 8;
 226 }
 227
 228 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 229                                     u16 *blue, int regno)
 230 {
 231         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 232
 233         *red = intel_crtc->lut_r[regno] << 8;
 234         *green = intel_crtc->lut_g[regno] << 8;
 235         *blue = intel_crtc->lut_b[regno] << 8;
 236 }
 237
 238 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 239         .gamma_set = intel_crtc_fb_gamma_set,
 240         .gamma_get = intel_crtc_fb_gamma_get,
 241         .fb_probe = intelfb_create,
 242 };
 243
 244 static void intel_fbdev_destroy(struct drm_device *dev,
 245                                 struct intel_fbdev *ifbdev)
 246 {
 247         if (ifbdev->helper.fbdev) {
 248                 struct fb_info *info = ifbdev->helper.fbdev;
 249
 250                 unregister_framebuffer(info);
 251                 iounmap(info->screen_base);
 252                 if (info->cmap.len)
 253                         fb_dealloc_cmap(&info->cmap);
 254
 255                 framebuffer_release(info);
 256         }
 257
 258         drm_fb_helper_fini(&ifbdev->helper);
 259
 260         drm_framebuffer_unregister_private(&ifbdev->ifb.base);
 261         intel_framebuffer_fini(&ifbdev->ifb);
 262 }
 263
 264 int intel_fbdev_init(struct drm_device *dev)
 265 {
 266         struct intel_fbdev *ifbdev;
 267         struct drm_i915_private *dev_priv = dev->dev_private;
 268         int ret;
 269
 270         ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
 271         if (!ifbdev)
 272                 return -ENOMEM;
 273
 274         dev_priv->fbdev = ifbdev;
 275         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 276
 277         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 278                                  INTEL_INFO(dev)->num_pipes,
 279                                  4);
 280         if (ret) {
 281                 kfree(ifbdev);
 282                 return ret;
 283         }
 284
 285         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 286
 287         return 0;
 288 }
 289
 290 void intel_fbdev_initial_config(struct drm_device *dev)
 291 {
 292         struct drm_i915_private *dev_priv = dev->dev_private;
 293
 294         /* Due to peculiar init order wrt to hpd handling this is separate. */
 295         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 296 }
 297
 298 void intel_fbdev_fini(struct drm_device *dev)
 299 {
 300         struct drm_i915_private *dev_priv = dev->dev_private;
 301         if (!dev_priv->fbdev)
 302                 return;
 303
 304         intel_fbdev_destroy(dev, dev_priv->fbdev);
 305         kfree(dev_priv->fbdev);
 306         dev_priv->fbdev = NULL;
 307 }
 308
 309 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 310 {
 311         struct drm_i915_private *dev_priv = dev->dev_private;
 312         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 313         struct fb_info *info;
 314
 315         if (!ifbdev)
 316                 return;
 317
 318         info = ifbdev->helper.fbdev;
 319
 320         /* On resume from hibernation: If the object is shmemfs backed, it has
 321          * been restored from swap. If the object is stolen however, it will be
 322          * full of whatever garbage was left in there.
 323          */
 324         if (state == FBINFO_STATE_RUNNING && ifbdev->ifb.obj->stolen)
 325                 memset_io(info->screen_base, 0, info->screen_size);
 326
 327         fb_set_suspend(info, state);
 328 }
 329
 330 MODULE_LICENSE("GPL and additional rights");
 331
 332 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 333 {
 334         struct drm_i915_private *dev_priv = dev->dev_private;
 335         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 336 }
 337
 338 void intel_fbdev_restore_mode(struct drm_device *dev)
 339 {
 340         int ret;
 341         struct drm_i915_private *dev_priv = dev->dev_private;
 342
 343         if (INTEL_INFO(dev)->num_pipes == 0)
 344                 return;
 345
 346         drm_modeset_lock_all(dev);
 347
 348         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 349         if (ret)
 350                 DRM_DEBUG("failed to restore crtc mode\n");
 351
 352         drm_modeset_unlock_all(dev);
 353 }