sys/dev/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 <drm/drmP.h>
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/errno.h>
  31 #include <linux/string.h>
  32 #include <linux/mm.h>
  33 #include <linux/delay.h>
  34 #include <linux/fb.h>
  35
  36 #include <drm/drm_crtc.h>
  37 #include <drm/drm_fb_helper.h>
  38 #include "intel_drv.h"
  39 #include <drm/i915_drm.h>
  40 #include "i915_drv.h"
  41
  42 #if 0
  43 static struct fb_ops intelfb_ops = {
  44         .owner = THIS_MODULE,
  45         .fb_check_var = drm_fb_helper_check_var,
  46         .fb_set_par = drm_fb_helper_set_par,
  47         .fb_fillrect = cfb_fillrect,
  48         .fb_copyarea = cfb_copyarea,
  49         .fb_imageblit = cfb_imageblit,
  50         .fb_pan_display = drm_fb_helper_pan_display,
  51         .fb_blank = drm_fb_helper_blank,
  52         .fb_setcmap = drm_fb_helper_setcmap,
  53         .fb_debug_enter = drm_fb_helper_debug_enter,
  54         .fb_debug_leave = drm_fb_helper_debug_leave,
  55 };
  56 #endif
  57
  58 static int intelfb_alloc(struct drm_fb_helper *helper,
  59                          struct drm_fb_helper_surface_size *sizes)
  60 {
  61         struct intel_fbdev *ifbdev =
  62                 container_of(helper, struct intel_fbdev, helper);
  63         struct drm_device *dev = helper->dev;
  64         struct drm_mode_fb_cmd2 mode_cmd = {};
  65         struct drm_i915_gem_object *obj;
  66         int size, ret;
  67
  68         /* we don't do packed 24bpp */
  69         if (sizes->surface_bpp == 24)
  70                 sizes->surface_bpp = 32;
  71
  72         mode_cmd.width = sizes->surface_width;
  73         mode_cmd.height = sizes->surface_height;
  74
  75         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
  76                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
  77         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  78                                                           sizes->surface_depth);
  79
  80         size = mode_cmd.pitches[0] * mode_cmd.height;
  81         size = ALIGN(size, PAGE_SIZE);
  82         obj = i915_gem_object_create_stolen(dev, size);
  83         if (obj == NULL)
  84                 obj = i915_gem_alloc_object(dev, size);
  85         if (!obj) {
  86                 DRM_ERROR("failed to allocate framebuffer\n");
  87                 ret = -ENOMEM;
  88                 goto out;
  89         }
  90
  91         /* Flush everything out, we'll be doing GTT only from now on */
  92         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
  93         if (ret) {
  94                 DRM_ERROR("failed to pin fb: %d\n", ret);
  95                 goto out_unref;
  96         }
  97
  98         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
  99         if (ret)
 100                 goto out_unpin;
 101
 102         return 0;
 103
 104 out_unpin:
 105         i915_gem_object_unpin(obj);
 106 out_unref:
 107         drm_gem_object_unreference(&obj->base);
 108 out:
 109         return ret;
 110 }
 111
 112 static int intelfb_create(struct drm_fb_helper *helper,
 113                           struct drm_fb_helper_surface_size *sizes)
 114 {
 115         struct intel_fbdev *ifbdev =
 116                 container_of(helper, struct intel_fbdev, helper);
 117         struct intel_framebuffer *intel_fb = &ifbdev->ifb;
 118         struct drm_device *dev = helper->dev;
 119 #if 0
 120         struct drm_i915_private *dev_priv = dev->dev_private;
 121 #endif
 122         struct fb_info *info;
 123         struct drm_framebuffer *fb;
 124         struct drm_i915_gem_object *obj;
 125         device_t vga_dev;
 126         int size, ret;
 127
 128         mutex_lock(&dev->struct_mutex);
 129
 130         if (!intel_fb->obj) {
 131                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 132                 ret = intelfb_alloc(helper, sizes);
 133                 if (ret)
 134                         goto out_unlock;
 135         } else {
 136                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 137                 sizes->fb_width = intel_fb->base.width;
 138                 sizes->fb_height = intel_fb->base.height;
 139         }
 140
 141         obj = intel_fb->obj;
 142         size = obj->base.size;
 143
 144 #if 0
 145         info = framebuffer_alloc(0, &dev->pdev->dev);
 146         if (!info) {
 147                 ret = -ENOMEM;
 148                 goto out_unpin;
 149         }
 150
 151         info->par = helper;
 152 #endif
 153         vga_dev = device_get_parent(dev->dev);
 154         info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO);
 155         info->width = sizes->fb_width;
 156         info->height = sizes->fb_height;
 157         info->stride =
 158             ALIGN(sizes->surface_width * ((sizes->surface_bpp + 7) / 8), 64);
 159         info->depth = sizes->surface_bpp;
 160         info->paddr = dev->agp->base + i915_gem_obj_ggtt_offset(obj);
 161         info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
 162         info->vaddr =
 163             (vm_offset_t)pmap_mapdev_attr(info->paddr,
 164                 sizes->surface_height * info->stride,
 165                 VM_MEMATTR_WRITE_COMBINING);
 166
 167         fb = &ifbdev->ifb.base;
 168
 169         ifbdev->helper.fb = fb;
 170         ifbdev->helper.fbdev = info;
 171
 172 #if 0
 173         strcpy(info->fix.id, "inteldrmfb");
 174
 175         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 176         info->fbops = &intelfb_ops;
 177
 178         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 179         if (ret) {
 180                 ret = -ENOMEM;
 181                 goto out_unpin;
 182         }
 183         /* setup aperture base/size for vesafb takeover */
 184         info->apertures = alloc_apertures(1);
 185         if (!info->apertures) {
 186                 ret = -ENOMEM;
 187                 goto out_unpin;
 188         }
 189         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 190         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 191
 192         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 193         info->fix.smem_len = size;
 194
 195         info->screen_base =
 196                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 197                            size);
 198         if (!info->screen_base) {
 199                 ret = -ENOSPC;
 200                 goto out_unpin;
 201         }
 202         info->screen_size = size;
 203
 204         /* This driver doesn't need a VT switch to restore the mode on resume */
 205         info->skip_vt_switch = true;
 206
 207         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 208         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 209
 210         /* If the object is shmemfs backed, it will have given us zeroed pages.
 211          * If the object is stolen however, it will be full of whatever
 212          * garbage was left in there.
 213          */
 214         if (ifbdev->ifb.obj->stolen)
 215                 memset_io(info->screen_base, 0, info->screen_size);
 216
 217         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 218 #endif
 219
 220         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 221                       fb->width, fb->height,
 222                       i915_gem_obj_ggtt_offset(obj), obj);
 223
 224         mutex_unlock(&dev->struct_mutex);
 225 #if 0
 226         vga_switcheroo_client_fb_set(dev->pdev, info);
 227 #endif
 228         return 0;
 229
 230 #if 0
 231 out_unpin:
 232         i915_gem_object_unpin(obj);
 233         drm_gem_object_unreference(&obj->base);
 234 #endif
 235 out_unlock:
 236         mutex_unlock(&dev->struct_mutex);
 237         return ret;
 238 }
 239
 240 /** Sets the color ramps on behalf of RandR */
 241 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 242                                     u16 blue, int regno)
 243 {
 244         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 245
 246         intel_crtc->lut_r[regno] = red >> 8;
 247         intel_crtc->lut_g[regno] = green >> 8;
 248         intel_crtc->lut_b[regno] = blue >> 8;
 249 }
 250
 251 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 252                                     u16 *blue, int regno)
 253 {
 254         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 255
 256         *red = intel_crtc->lut_r[regno] << 8;
 257         *green = intel_crtc->lut_g[regno] << 8;
 258         *blue = intel_crtc->lut_b[regno] << 8;
 259 }
 260
 261 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 262         .gamma_set = intel_crtc_fb_gamma_set,
 263         .gamma_get = intel_crtc_fb_gamma_get,
 264         .fb_probe = intelfb_create,
 265 };
 266
 267 static void intel_fbdev_destroy(struct drm_device *dev,
 268                                 struct intel_fbdev *ifbdev)
 269 {
 270 #if 0
 271         if (ifbdev->helper.fbdev) {
 272                 struct fb_info *info = ifbdev->helper.fbdev;
 273
 274                 unregister_framebuffer(info);
 275                 iounmap(info->screen_base);
 276                 if (info->cmap.len)
 277                         fb_dealloc_cmap(&info->cmap);
 278
 279                 framebuffer_release(info);
 280         }
 281 #endif
 282
 283         drm_fb_helper_fini(&ifbdev->helper);
 284
 285         drm_framebuffer_unregister_private(&ifbdev->ifb.base);
 286         intel_framebuffer_fini(&ifbdev->ifb);
 287 }
 288
 289 int intel_fbdev_init(struct drm_device *dev)
 290 {
 291         struct intel_fbdev *ifbdev;
 292         struct drm_i915_private *dev_priv = dev->dev_private;
 293         int ret;
 294
 295         ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
 296         if (!ifbdev)
 297                 return -ENOMEM;
 298
 299         dev_priv->fbdev = ifbdev;
 300         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 301
 302         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 303                                  INTEL_INFO(dev)->num_pipes,
 304                                  4);
 305         if (ret) {
 306                 kfree(ifbdev);
 307                 return ret;
 308         }
 309
 310         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 311
 312         return 0;
 313 }
 314
 315 void intel_fbdev_initial_config(struct drm_device *dev)
 316 {
 317         struct drm_i915_private *dev_priv = dev->dev_private;
 318
 319         /* Due to peculiar init order wrt to hpd handling this is separate. */
 320         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 321 }
 322
 323 void intel_fbdev_fini(struct drm_device *dev)
 324 {
 325         struct drm_i915_private *dev_priv = dev->dev_private;
 326         if (!dev_priv->fbdev)
 327                 return;
 328
 329         intel_fbdev_destroy(dev, dev_priv->fbdev);
 330         kfree(dev_priv->fbdev);
 331         dev_priv->fbdev = NULL;
 332 }
 333
 334 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 335 {
 336 #if 0
 337         struct drm_i915_private *dev_priv = dev->dev_private;
 338         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 339         struct fb_info *info;
 340
 341         if (!ifbdev)
 342                 return;
 343
 344         info = ifbdev->helper.fbdev;
 345
 346         /* On resume from hibernation: If the object is shmemfs backed, it has
 347          * been restored from swap. If the object is stolen however, it will be
 348          * full of whatever garbage was left in there.
 349          */
 350         if (state == FBINFO_STATE_RUNNING && ifbdev->ifb.obj->stolen)
 351                 memset_io(info->screen_base, 0, info->screen_size);
 352
 353         fb_set_suspend(info, state);
 354 #endif
 355 }
 356
 357 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 358 {
 359         struct drm_i915_private *dev_priv = dev->dev_private;
 360         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 361 }
 362
 363 void intel_fbdev_restore_mode(struct drm_device *dev)
 364 {
 365         int ret;
 366         struct drm_i915_private *dev_priv = dev->dev_private;
 367
 368         if (INTEL_INFO(dev)->num_pipes == 0)
 369                 return;
 370
 371         drm_modeset_lock_all(dev);
 372
 373         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 374         if (ret)
 375                 DRM_DEBUG("failed to restore crtc mode\n");
 376
 377         drm_modeset_unlock_all(dev);
 378 }