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_create(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_i915_private *dev_priv = dev->dev_private;
  67         struct fb_info *info;
  68         struct drm_framebuffer *fb;
  69         struct drm_mode_fb_cmd2 mode_cmd = {};
  70         struct drm_i915_gem_object *obj;
  71         struct device *device = &dev->pdev->dev;
  72         int size, ret;
  73
  74         /* we don't do packed 24bpp */
  75         if (sizes->surface_bpp == 24)
  76                 sizes->surface_bpp = 32;
  77
  78         mode_cmd.width = sizes->surface_width;
  79         mode_cmd.height = sizes->surface_height;
  80
  81         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
  82                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
  83         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  84                                                           sizes->surface_depth);
  85
  86         size = mode_cmd.pitches[0] * mode_cmd.height;
  87         size = ALIGN(size, PAGE_SIZE);
  88         obj = i915_gem_object_create_stolen(dev, size);
  89         if (obj == NULL)
  90                 obj = i915_gem_alloc_object(dev, size);
  91         if (!obj) {
  92                 DRM_ERROR("failed to allocate framebuffer\n");
  93                 ret = -ENOMEM;
  94                 goto out;
  95         }
  96
  97         mutex_lock(&dev->struct_mutex);
  98
  99         /* Flush everything out, we'll be doing GTT only from now on */
 100         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
 101         if (ret) {
 102                 DRM_ERROR("failed to pin fb: %d\n", ret);
 103                 goto out_unref;
 104         }
 105
 106         info = framebuffer_alloc(0, device);
 107         if (!info) {
 108                 ret = -ENOMEM;
 109                 goto out_unpin;
 110         }
 111
 112         info->par = helper;
 113
 114         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
 115         if (ret)
 116                 goto out_unpin;
 117
 118         fb = &ifbdev->ifb.base;
 119
 120         ifbdev->helper.fb = fb;
 121         ifbdev->helper.fbdev = info;
 122
 123         strcpy(info->fix.id, "inteldrmfb");
 124
 125         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 126         info->fbops = &intelfb_ops;
 127
 128         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 129         if (ret) {
 130                 ret = -ENOMEM;
 131                 goto out_unpin;
 132         }
 133         /* setup aperture base/size for vesafb takeover */
 134         info->apertures = alloc_apertures(1);
 135         if (!info->apertures) {
 136                 ret = -ENOMEM;
 137                 goto out_unpin;
 138         }
 139         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 140         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 141
 142         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 143         info->fix.smem_len = size;
 144
 145         info->screen_base =
 146                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 147                            size);
 148         if (!info->screen_base) {
 149                 ret = -ENOSPC;
 150                 goto out_unpin;
 151         }
 152         info->screen_size = size;
 153
 154         /* This driver doesn't need a VT switch to restore the mode on resume */
 155         info->skip_vt_switch = true;
 156
 157         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 158         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 159
 160         /* If the object is shmemfs backed, it will have given us zeroed pages.
 161          * If the object is stolen however, it will be full of whatever
 162          * garbage was left in there.
 163          */
 164         if (ifbdev->ifb.obj->stolen)
 165                 memset_io(info->screen_base, 0, info->screen_size);
 166
 167         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 168
 169         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 170                       fb->width, fb->height,
 171                       i915_gem_obj_ggtt_offset(obj), obj);
 172
 173
 174         mutex_unlock(&dev->struct_mutex);
 175         vga_switcheroo_client_fb_set(dev->pdev, info);
 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 /** Sets the color ramps on behalf of RandR */
 188 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 189                                     u16 blue, int regno)
 190 {
 191         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 192
 193         intel_crtc->lut_r[regno] = red >> 8;
 194         intel_crtc->lut_g[regno] = green >> 8;
 195         intel_crtc->lut_b[regno] = blue >> 8;
 196 }
 197
 198 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 199                                     u16 *blue, int regno)
 200 {
 201         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 202
 203         *red = intel_crtc->lut_r[regno] << 8;
 204         *green = intel_crtc->lut_g[regno] << 8;
 205         *blue = intel_crtc->lut_b[regno] << 8;
 206 }
 207
 208 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 209         .gamma_set = intel_crtc_fb_gamma_set,
 210         .gamma_get = intel_crtc_fb_gamma_get,
 211         .fb_probe = intelfb_create,
 212 };
 213
 214 static void intel_fbdev_destroy(struct drm_device *dev,
 215                                 struct intel_fbdev *ifbdev)
 216 {
 217         if (ifbdev->helper.fbdev) {
 218                 struct fb_info *info = ifbdev->helper.fbdev;
 219
 220                 unregister_framebuffer(info);
 221                 iounmap(info->screen_base);
 222                 if (info->cmap.len)
 223                         fb_dealloc_cmap(&info->cmap);
 224
 225                 framebuffer_release(info);
 226         }
 227
 228         drm_fb_helper_fini(&ifbdev->helper);
 229
 230         drm_framebuffer_unregister_private(&ifbdev->ifb.base);
 231         intel_framebuffer_fini(&ifbdev->ifb);
 232 }
 233
 234 int intel_fbdev_init(struct drm_device *dev)
 235 {
 236         struct intel_fbdev *ifbdev;
 237         struct drm_i915_private *dev_priv = dev->dev_private;
 238         int ret;
 239
 240         ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
 241         if (!ifbdev)
 242                 return -ENOMEM;
 243
 244         dev_priv->fbdev = ifbdev;
 245         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 246
 247         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 248                                  INTEL_INFO(dev)->num_pipes,
 249                                  4);
 250         if (ret) {
 251                 kfree(ifbdev);
 252                 return ret;
 253         }
 254
 255         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 256
 257         return 0;
 258 }
 259
 260 void intel_fbdev_initial_config(struct drm_device *dev)
 261 {
 262         struct drm_i915_private *dev_priv = dev->dev_private;
 263
 264         /* Due to peculiar init order wrt to hpd handling this is separate. */
 265         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 266 }
 267
 268 void intel_fbdev_fini(struct drm_device *dev)
 269 {
 270         struct drm_i915_private *dev_priv = dev->dev_private;
 271         if (!dev_priv->fbdev)
 272                 return;
 273
 274         intel_fbdev_destroy(dev, dev_priv->fbdev);
 275         kfree(dev_priv->fbdev);
 276         dev_priv->fbdev = NULL;
 277 }
 278
 279 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 280 {
 281         struct drm_i915_private *dev_priv = dev->dev_private;
 282         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 283         struct fb_info *info;
 284
 285         if (!ifbdev)
 286                 return;
 287
 288         info = ifbdev->helper.fbdev;
 289
 290         /* On resume from hibernation: If the object is shmemfs backed, it has
 291          * been restored from swap. If the object is stolen however, it will be
 292          * full of whatever garbage was left in there.
 293          */
 294         if (state == FBINFO_STATE_RUNNING && ifbdev->ifb.obj->stolen)
 295                 memset_io(info->screen_base, 0, info->screen_size);
 296
 297         fb_set_suspend(info, state);
 298 }
 299
 300 MODULE_LICENSE("GPL and additional rights");
 301
 302 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 303 {
 304         struct drm_i915_private *dev_priv = dev->dev_private;
 305         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 306 }
 307
 308 void intel_fbdev_restore_mode(struct drm_device *dev)
 309 {
 310         int ret;
 311         struct drm_i915_private *dev_priv = dev->dev_private;
 312
 313         if (INTEL_INFO(dev)->num_pipes == 0)
 314                 return;
 315
 316         drm_modeset_lock_all(dev);
 317
 318         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 319         if (ret)
 320                 DRM_DEBUG("failed to restore crtc mode\n");
 321
 322         drm_modeset_unlock_all(dev);
 323 }