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 intel_fbdev *ifbdev,
  61                           struct drm_fb_helper_surface_size *sizes)
  62 {
  63         struct drm_device *dev = ifbdev->helper.dev;
  64         struct drm_i915_private *dev_priv = dev->dev_private;
  65         struct fb_info *info;
  66         struct drm_framebuffer *fb;
  67         struct drm_mode_fb_cmd2 mode_cmd = {};
  68         struct drm_i915_gem_object *obj;
  69         struct device *device = &dev->pdev->dev;
  70         int size, ret;
  71
  72         /* we don't do packed 24bpp */
  73         if (sizes->surface_bpp == 24)
  74                 sizes->surface_bpp = 32;
  75
  76         mode_cmd.width = sizes->surface_width;
  77         mode_cmd.height = sizes->surface_height;
  78
  79         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((sizes->surface_bpp + 7) /
  80                                                       8), 64);
  81         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  82                                                           sizes->surface_depth);
  83
  84         size = mode_cmd.pitches[0] * mode_cmd.height;
  85         size = ALIGN(size, PAGE_SIZE);
  86         obj = i915_gem_object_create_stolen(dev, size);
  87         if (obj == NULL)
  88                 obj = i915_gem_alloc_object(dev, size);
  89         if (!obj) {
  90                 DRM_ERROR("failed to allocate framebuffer\n");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         mutex_lock(&dev->struct_mutex);
  96
  97         /* Flush everything out, we'll be doing GTT only from now on */
  98         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
  99         if (ret) {
 100                 DRM_ERROR("failed to pin fb: %d\n", ret);
 101                 goto out_unref;
 102         }
 103
 104         info = framebuffer_alloc(0, device);
 105         if (!info) {
 106                 ret = -ENOMEM;
 107                 goto out_unpin;
 108         }
 109
 110         info->par = ifbdev;
 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         ifbdev->helper.fbdev = info;
 120
 121         strcpy(info->fix.id, "inteldrmfb");
 122
 123         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 124         info->fbops = &intelfb_ops;
 125
 126         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 127         if (ret) {
 128                 ret = -ENOMEM;
 129                 goto out_unpin;
 130         }
 131         /* setup aperture base/size for vesafb takeover */
 132         info->apertures = alloc_apertures(1);
 133         if (!info->apertures) {
 134                 ret = -ENOMEM;
 135                 goto out_unpin;
 136         }
 137         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 138         info->apertures->ranges[0].size =
 139                 dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
 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 //      memset(info->screen_base, 0, size);
 154
 155         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 156         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 157
 158         /* If the object is shmemfs backed, it will have given us zeroed pages.
 159          * If the object is stolen however, it will be full of whatever
 160          * garbage was left in there.
 161          */
 162         if (ifbdev->ifb.obj->stolen)
 163                 memset_io(info->screen_base, 0, info->screen_size);
 164
 165         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 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         vga_switcheroo_client_fb_set(dev->pdev, info);
 174         return 0;
 175
 176 out_unpin:
 177         i915_gem_object_unpin(obj);
 178 out_unref:
 179         drm_gem_object_unreference(&obj->base);
 180         mutex_unlock(&dev->struct_mutex);
 181 out:
 182         return ret;
 183 }
 184
 185 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 186                                           struct drm_fb_helper_surface_size *sizes)
 187 {
 188         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 189         int new_fb = 0;
 190         int ret;
 191
 192         if (!helper->fb) {
 193                 ret = intelfb_create(ifbdev, sizes);
 194                 if (ret)
 195                         return ret;
 196                 new_fb = 1;
 197         }
 198         return new_fb;
 199 }
 200
 201 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 202         .gamma_set = intel_crtc_fb_gamma_set,
 203         .gamma_get = intel_crtc_fb_gamma_get,
 204         .fb_probe = intel_fb_find_or_create_single,
 205 };
 206
 207 static void intel_fbdev_destroy(struct drm_device *dev,
 208                                 struct intel_fbdev *ifbdev)
 209 {
 210         struct fb_info *info;
 211         struct intel_framebuffer *ifb = &ifbdev->ifb;
 212
 213         if (ifbdev->helper.fbdev) {
 214                 info = ifbdev->helper.fbdev;
 215                 unregister_framebuffer(info);
 216                 iounmap(info->screen_base);
 217                 if (info->cmap.len)
 218                         fb_dealloc_cmap(&info->cmap);
 219                 framebuffer_release(info);
 220         }
 221
 222         drm_fb_helper_fini(&ifbdev->helper);
 223
 224         drm_framebuffer_cleanup(&ifb->base);
 225         if (ifb->obj) {
 226                 drm_gem_object_unreference_unlocked(&ifb->obj->base);
 227                 ifb->obj = NULL;
 228         }
 229 }
 230
 231 int intel_fbdev_init(struct drm_device *dev)
 232 {
 233         struct intel_fbdev *ifbdev;
 234         drm_i915_private_t *dev_priv = dev->dev_private;
 235         int ret;
 236
 237         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 238         if (!ifbdev)
 239                 return -ENOMEM;
 240
 241         dev_priv->fbdev = ifbdev;
 242         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 243
 244         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 245                                  dev_priv->num_pipe,
 246                                  INTELFB_CONN_LIMIT);
 247         if (ret) {
 248                 kfree(ifbdev);
 249                 return ret;
 250         }
 251
 252         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 253
 254         return 0;
 255 }
 256
 257 void intel_fbdev_initial_config(struct drm_device *dev)
 258 {
 259         drm_i915_private_t *dev_priv = dev->dev_private;
 260
 261         /* Due to peculiar init order wrt to hpd handling this is separate. */
 262         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 263 }
 264
 265 void intel_fbdev_fini(struct drm_device *dev)
 266 {
 267         drm_i915_private_t *dev_priv = dev->dev_private;
 268         if (!dev_priv->fbdev)
 269                 return;
 270
 271         intel_fbdev_destroy(dev, dev_priv->fbdev);
 272         kfree(dev_priv->fbdev);
 273         dev_priv->fbdev = NULL;
 274 }
 275
 276 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 277 {
 278         drm_i915_private_t *dev_priv = dev->dev_private;
 279         if (!dev_priv->fbdev)
 280                 return;
 281
 282         fb_set_suspend(dev_priv->fbdev->helper.fbdev, state);
 283 }
 284
 285 MODULE_LICENSE("GPL and additional rights");
 286
 287 void intel_fb_output_poll_changed(struct drm_device *dev)
 288 {
 289         drm_i915_private_t *dev_priv = dev->dev_private;
 290         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 291 }
 292
 293 void intel_fb_restore_mode(struct drm_device *dev)
 294 {
 295         int ret;
 296         drm_i915_private_t *dev_priv = dev->dev_private;
 297         struct drm_mode_config *config = &dev->mode_config;
 298         struct drm_plane *plane;
 299
 300         mutex_lock(&dev->mode_config.mutex);
 301
 302         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 303         if (ret)
 304                 DRM_DEBUG("failed to restore crtc mode\n");
 305
 306         /* Be sure to shut off any planes that may be active */
 307         list_for_each_entry(plane, &config->plane_list, head)
 308                 plane->funcs->disable_plane(plane);
 309
 310         mutex_unlock(&dev->mode_config.mutex);
 311 }