sys/dev/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/mm.h>
  31 #include <linux/delay.h>
  32
  33 #include <drm/drmP.h>
  34 #include <drm/drm_crtc.h>
  35 #include <drm/drm_fb_helper.h>
  36 #include "intel_drv.h"
  37 #include <drm/i915_drm.h>
  38 #include "i915_drv.h"
  39
  40 #if 0
  41 static struct fb_ops intelfb_ops = {
  42         .owner = THIS_MODULE,
  43         .fb_check_var = drm_fb_helper_check_var,
  44         .fb_set_par = drm_fb_helper_set_par,
  45         .fb_fillrect = cfb_fillrect,
  46         .fb_copyarea = cfb_copyarea,
  47         .fb_imageblit = cfb_imageblit,
  48         .fb_pan_display = drm_fb_helper_pan_display,
  49         .fb_blank = drm_fb_helper_blank,
  50         .fb_setcmap = drm_fb_helper_setcmap,
  51         .fb_debug_enter = drm_fb_helper_debug_enter,
  52         .fb_debug_leave = drm_fb_helper_debug_leave,
  53 };
  54 #endif
  55
  56 static int intelfb_create(struct drm_fb_helper *helper,
  57                           struct drm_fb_helper_surface_size *sizes)
  58 {
  59         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
  60         struct drm_device *dev = ifbdev->helper.dev;
  61 #if 0
  62         struct drm_i915_private *dev_priv = dev->dev_private;
  63         struct fb_info *info;
  64 #endif
  65         struct drm_framebuffer *fb;
  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 * ((sizes->surface_bpp + 7) /
  78                                                       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_alloc_object(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         mutex_lock(&dev->struct_mutex);
  94
  95         /* Flush everything out, we'll be doing GTT only from now on */
  96         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
  97         if (ret) {
  98                 DRM_ERROR("failed to pin fb: %d\n", ret);
  99                 goto out_unref;
 100         }
 101
 102 #if 0
 103         info = framebuffer_alloc(0, device);
 104         if (!info) {
 105                 ret = -ENOMEM;
 106                 goto out_unpin;
 107         }
 108
 109         info->par = ifbdev;
 110 #endif
 111
 112         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
 113         if (ret)
 114                 goto out_unpin;
 115
 116         fb = &ifbdev->ifb.base;
 117
 118         ifbdev->helper.fb = fb;
 119 #if 0
 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 = ioremap_wc(dev->agp->base + obj->gtt_offset, size);
 145         if (!info->screen_base) {
 146                 ret = -ENOSPC;
 147                 goto out_unpin;
 148         }
 149         info->screen_size = size;
 150
 151         /* This driver doesn't need a VT switch to restore the mode on resume */
 152         info->skip_vt_switch = true;
 153
 154         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 155         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 156
 157         /* If the object is shmemfs backed, it will have given us zeroed pages.
 158          * If the object is stolen however, it will be full of whatever
 159          * garbage was left in there.
 160          */
 161         if (ifbdev->ifb.obj->stolen)
 162                 memset_io(info->screen_base, 0, info->screen_size);
 163
 164         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 165 #endif
 166
 167         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 168                       fb->width, fb->height,
 169                       obj->gtt_offset, obj);
 170
 171
 172         mutex_unlock(&dev->struct_mutex);
 173 #if 0
 174         vga_switcheroo_client_fb_set(dev->pdev, info);
 175 #endif
 176         return 0;
 177
 178 out_unpin:
 179         i915_gem_object_unpin(obj);
 180 out_unref:
 181         drm_gem_object_unreference(&obj->base);
 182         mutex_unlock(&dev->struct_mutex);
 183 out:
 184         return ret;
 185 }
 186
 187 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 188         .gamma_set = intel_crtc_fb_gamma_set,
 189         .gamma_get = intel_crtc_fb_gamma_get,
 190         .fb_probe = intelfb_create,
 191 };
 192
 193 static void intel_fbdev_destroy(struct drm_device *dev,
 194                                 struct intel_fbdev *ifbdev)
 195 {
 196 #if 0
 197         struct fb_info *info;
 198 #endif
 199         struct intel_framebuffer *ifb = &ifbdev->ifb;
 200
 201 #if 0
 202         if (ifbdev->helper.fbdev) {
 203                 info = ifbdev->helper.fbdev;
 204                 unregister_framebuffer(info);
 205                 iounmap(info->screen_base);
 206                 if (info->cmap.len)
 207                         fb_dealloc_cmap(&info->cmap);
 208                 framebuffer_release(info);
 209         }
 210 #endif
 211
 212         drm_fb_helper_fini(&ifbdev->helper);
 213
 214         drm_framebuffer_unregister_private(&ifb->base);
 215         drm_framebuffer_cleanup(&ifb->base);
 216         if (ifb->obj) {
 217                 drm_gem_object_unreference_unlocked(&ifb->obj->base);
 218                 ifb->obj = NULL;
 219         }
 220 }
 221
 222 extern int sc_txtmouse_no_retrace_wait;
 223
 224 int intel_fbdev_init(struct drm_device *dev)
 225 {
 226         struct intel_fbdev *ifbdev;
 227         drm_i915_private_t *dev_priv = dev->dev_private;
 228         int ret;
 229
 230         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 231         if (!ifbdev)
 232                 return -ENOMEM;
 233
 234         dev_priv->fbdev = ifbdev;
 235         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 236
 237         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 238                                  INTEL_INFO(dev)->num_pipes,
 239                                  INTELFB_CONN_LIMIT);
 240         if (ret) {
 241                 kfree(ifbdev);
 242                 return ret;
 243         }
 244
 245         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 246         sc_txtmouse_no_retrace_wait = 1;
 247
 248         return 0;
 249 }
 250
 251 void intel_fbdev_initial_config(struct drm_device *dev)
 252 {
 253         drm_i915_private_t *dev_priv = dev->dev_private;
 254
 255         /* Due to peculiar init order wrt to hpd handling this is separate. */
 256         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 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
 270 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 271 {
 272 #if 0
 273         drm_i915_private_t *dev_priv = dev->dev_private;
 274         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 275         struct fb_info *info;
 276
 277         if (!ifbdev)
 278                 return;
 279
 280         info = ifbdev->helper.fbdev;
 281
 282         /* On resume from hibernation: If the object is shmemfs backed, it has
 283          * been restored from swap. If the object is stolen however, it will be
 284          * full of whatever garbage was left in there.
 285          */
 286         if (!state && ifbdev->ifb.obj->stolen)
 287                 memset_io(info->screen_base, 0, info->screen_size);
 288
 289         fb_set_suspend(info, state);
 290 #endif
 291 }
 292
 293 void intel_fb_output_poll_changed(struct drm_device *dev)
 294 {
 295         drm_i915_private_t *dev_priv = dev->dev_private;
 296         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 297 }
 298
 299 void intel_fb_restore_mode(struct drm_device *dev)
 300 {
 301         int ret;
 302         drm_i915_private_t *dev_priv = dev->dev_private;
 303         struct drm_mode_config *config = &dev->mode_config;
 304         struct drm_plane *plane;
 305
 306         if (INTEL_INFO(dev)->num_pipes == 0)
 307                 return;
 308
 309         drm_modeset_lock_all(dev);
 310
 311         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 312         if (ret)
 313                 DRM_DEBUG("failed to restore crtc mode\n");
 314
 315         /* Be sure to shut off any planes that may be active */
 316         list_for_each_entry(plane, &config->plane_list, head)
 317                 if (plane->enabled)
 318                         plane->funcs->disable_plane(plane);
 319
 320         drm_modeset_unlock_all(dev);
 321 }