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 <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_create(struct drm_fb_helper *helper,
  61                           struct drm_fb_helper_surface_size *sizes)
  62 {
  63         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
  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_object_create_stolen(dev, size);
  88         if (obj == NULL)
  89                 obj = i915_gem_alloc_object(dev, size);
  90         if (!obj) {
  91                 DRM_ERROR("failed to allocate framebuffer\n");
  92                 ret = -ENOMEM;
  93                 goto out;
  94         }
  95
  96         mutex_lock(&dev->struct_mutex);
  97
  98         /* Flush everything out, we'll be doing GTT only from now on */
  99         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
 100         if (ret) {
 101                 DRM_ERROR("failed to pin fb: %d\n", ret);
 102                 goto out_unref;
 103         }
 104
 105         info = framebuffer_alloc(0, device);
 106         if (!info) {
 107                 ret = -ENOMEM;
 108                 goto out_unpin;
 109         }
 110
 111         info->par = ifbdev;
 112
 113         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
 114         if (ret)
 115                 goto out_unpin;
 116
 117         fb = &ifbdev->ifb.base;
 118
 119         ifbdev->helper.fb = fb;
 120         ifbdev->helper.fbdev = info;
 121
 122         strcpy(info->fix.id, "inteldrmfb");
 123
 124         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 125         info->fbops = &intelfb_ops;
 126
 127         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 128         if (ret) {
 129                 ret = -ENOMEM;
 130                 goto out_unpin;
 131         }
 132         /* setup aperture base/size for vesafb takeover */
 133         info->apertures = alloc_apertures(1);
 134         if (!info->apertures) {
 135                 ret = -ENOMEM;
 136                 goto out_unpin;
 137         }
 138         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 139         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 140
 141         info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
 142         info->fix.smem_len = size;
 143
 144         info->screen_base =
 145                 ioremap_wc(dev_priv->gtt.mappable_base + obj->gtt_offset,
 146                            size);
 147         if (!info->screen_base) {
 148                 ret = -ENOSPC;
 149                 goto out_unpin;
 150         }
 151         info->screen_size = size;
 152
 153         /* This driver doesn't need a VT switch to restore the mode on resume */
 154         info->skip_vt_switch = true;
 155
 156         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 157         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 158
 159         /* If the object is shmemfs backed, it will have given us zeroed pages.
 160          * If the object is stolen however, it will be full of whatever
 161          * garbage was left in there.
 162          */
 163         if (ifbdev->ifb.obj->stolen)
 164                 memset_io(info->screen_base, 0, info->screen_size);
 165
 166         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 167
 168         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 169                       fb->width, fb->height,
 170                       obj->gtt_offset, obj);
 171
 172
 173         mutex_unlock(&dev->struct_mutex);
 174         vga_switcheroo_client_fb_set(dev->pdev, info);
 175         return 0;
 176
 177 out_unpin:
 178         i915_gem_object_unpin(obj);
 179 out_unref:
 180         drm_gem_object_unreference(&obj->base);
 181         mutex_unlock(&dev->struct_mutex);
 182 out:
 183         return ret;
 184 }
 185
 186 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 187         .gamma_set = intel_crtc_fb_gamma_set,
 188         .gamma_get = intel_crtc_fb_gamma_get,
 189         .fb_probe = intelfb_create,
 190 };
 191
 192 static void intel_fbdev_destroy(struct drm_device *dev,
 193                                 struct intel_fbdev *ifbdev)
 194 {
 195         struct fb_info *info;
 196         struct intel_framebuffer *ifb = &ifbdev->ifb;
 197
 198         if (ifbdev->helper.fbdev) {
 199                 info = ifbdev->helper.fbdev;
 200                 unregister_framebuffer(info);
 201                 iounmap(info->screen_base);
 202                 if (info->cmap.len)
 203                         fb_dealloc_cmap(&info->cmap);
 204                 framebuffer_release(info);
 205         }
 206
 207         drm_fb_helper_fini(&ifbdev->helper);
 208
 209         drm_framebuffer_unregister_private(&ifb->base);
 210         drm_framebuffer_cleanup(&ifb->base);
 211         if (ifb->obj) {
 212                 drm_gem_object_unreference_unlocked(&ifb->obj->base);
 213                 ifb->obj = NULL;
 214         }
 215 }
 216
 217 int intel_fbdev_init(struct drm_device *dev)
 218 {
 219         struct intel_fbdev *ifbdev;
 220         drm_i915_private_t *dev_priv = dev->dev_private;
 221         int ret;
 222
 223         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 224         if (!ifbdev)
 225                 return -ENOMEM;
 226
 227         dev_priv->fbdev = ifbdev;
 228         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 229
 230         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 231                                  INTEL_INFO(dev)->num_pipes,
 232                                  INTELFB_CONN_LIMIT);
 233         if (ret) {
 234                 kfree(ifbdev);
 235                 return ret;
 236         }
 237
 238         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 239
 240         return 0;
 241 }
 242
 243 void intel_fbdev_initial_config(struct drm_device *dev)
 244 {
 245         drm_i915_private_t *dev_priv = dev->dev_private;
 246
 247         /* Due to peculiar init order wrt to hpd handling this is separate. */
 248         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 249 }
 250
 251 void 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 }
 261
 262 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 263 {
 264         drm_i915_private_t *dev_priv = dev->dev_private;
 265         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 266         struct fb_info *info;
 267
 268         if (!ifbdev)
 269                 return;
 270
 271         info = ifbdev->helper.fbdev;
 272
 273         /* On resume from hibernation: If the object is shmemfs backed, it has
 274          * been restored from swap. If the object is stolen however, it will be
 275          * full of whatever garbage was left in there.
 276          */
 277         if (!state && ifbdev->ifb.obj->stolen)
 278                 memset_io(info->screen_base, 0, info->screen_size);
 279
 280         fb_set_suspend(info, state);
 281 }
 282
 283 MODULE_LICENSE("GPL and additional rights");
 284
 285 void intel_fb_output_poll_changed(struct drm_device *dev)
 286 {
 287         drm_i915_private_t *dev_priv = dev->dev_private;
 288         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 289 }
 290
 291 void intel_fb_restore_mode(struct drm_device *dev)
 292 {
 293         int ret;
 294         drm_i915_private_t *dev_priv = dev->dev_private;
 295         struct drm_mode_config *config = &dev->mode_config;
 296         struct drm_plane *plane;
 297
 298         if (INTEL_INFO(dev)->num_pipes == 0)
 299                 return;
 300
 301         drm_modeset_lock_all(dev);
 302
 303         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 304         if (ret)
 305                 DRM_DEBUG("failed to restore crtc mode\n");
 306
 307         /* Be sure to shut off any planes that may be active */
 308         list_for_each_entry(plane, &config->plane_list, head)
 309                 if (plane->enabled)
 310                         plane->funcs->disable_plane(plane);
 311
 312         drm_modeset_unlock_all(dev);
 313 }