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 "drmP.h"
  40 #include "drm.h"
  41 #include "drm_crtc.h"
  42 #include "drm_fb_helper.h"
  43 #include "intel_drv.h"
  44 #include "i915_drm.h"
  45 #include "i915_drv.h"
  46
  47 static struct fb_ops intelfb_ops = {
  48         .owner = THIS_MODULE,
  49         .fb_check_var = drm_fb_helper_check_var,
  50         .fb_set_par = drm_fb_helper_set_par,
  51         .fb_fillrect = cfb_fillrect,
  52         .fb_copyarea = cfb_copyarea,
  53         .fb_imageblit = cfb_imageblit,
  54         .fb_pan_display = drm_fb_helper_pan_display,
  55         .fb_blank = drm_fb_helper_blank,
  56         .fb_setcmap = drm_fb_helper_setcmap,
  57         .fb_debug_enter = drm_fb_helper_debug_enter,
  58         .fb_debug_leave = drm_fb_helper_debug_leave,
  59 };
  60
  61 static int intelfb_create(struct intel_fbdev *ifbdev,
  62                           struct drm_fb_helper_surface_size *sizes)
  63 {
  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_alloc_object(dev, size);
  88         if (!obj) {
  89                 DRM_ERROR("failed to allocate framebuffer\n");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         mutex_lock(&dev->struct_mutex);
  95
  96         /* Flush everything out, we'll be doing GTT only from now on */
  97         ret = intel_pin_and_fence_fb_obj(dev, obj, false);
  98         if (ret) {
  99                 DRM_ERROR("failed to pin fb: %d\n", ret);
 100                 goto out_unref;
 101         }
 102
 103         info = framebuffer_alloc(0, device);
 104         if (!info) {
 105                 ret = -ENOMEM;
 106                 goto out_unpin;
 107         }
 108
 109         info->par = ifbdev;
 110
 111         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
 112         if (ret)
 113                 goto out_unpin;
 114
 115         fb = &ifbdev->ifb.base;
 116
 117         ifbdev->helper.fb = fb;
 118         ifbdev->helper.fbdev = info;
 119
 120         strcpy(info->fix.id, "inteldrmfb");
 121
 122         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 123         info->fbops = &intelfb_ops;
 124
 125         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 126         if (ret) {
 127                 ret = -ENOMEM;
 128                 goto out_unpin;
 129         }
 130         /* setup aperture base/size for vesafb takeover */
 131         info->apertures = alloc_apertures(1);
 132         if (!info->apertures) {
 133                 ret = -ENOMEM;
 134                 goto out_unpin;
 135         }
 136         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 137         info->apertures->ranges[0].size =
 138                 dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
 139
 140         info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
 141         info->fix.smem_len = size;
 142
 143         info->screen_base = ioremap_wc(dev->agp->base + obj->gtt_offset, size);
 144         if (!info->screen_base) {
 145                 ret = -ENOSPC;
 146                 goto out_unpin;
 147         }
 148         info->screen_size = size;
 149
 150 //      memset(info->screen_base, 0, size);
 151
 152         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 153         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 154
 155         info->pixmap.size = 64*1024;
 156         info->pixmap.buf_align = 8;
 157         info->pixmap.access_align = 32;
 158         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 159         info->pixmap.scan_align = 1;
 160
 161         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 162                       fb->width, fb->height,
 163                       obj->gtt_offset, obj);
 164
 165
 166         mutex_unlock(&dev->struct_mutex);
 167         vga_switcheroo_client_fb_set(dev->pdev, info);
 168         return 0;
 169
 170 out_unpin:
 171         i915_gem_object_unpin(obj);
 172 out_unref:
 173         drm_gem_object_unreference(&obj->base);
 174         mutex_unlock(&dev->struct_mutex);
 175 out:
 176         return ret;
 177 }
 178
 179 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 180                                           struct drm_fb_helper_surface_size *sizes)
 181 {
 182         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 183         int new_fb = 0;
 184         int ret;
 185
 186         if (!helper->fb) {
 187                 ret = intelfb_create(ifbdev, sizes);
 188                 if (ret)
 189                         return ret;
 190                 new_fb = 1;
 191         }
 192         return new_fb;
 193 }
 194
 195 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 196         .gamma_set = intel_crtc_fb_gamma_set,
 197         .gamma_get = intel_crtc_fb_gamma_get,
 198         .fb_probe = intel_fb_find_or_create_single,
 199 };
 200
 201 static void intel_fbdev_destroy(struct drm_device *dev,
 202                                 struct intel_fbdev *ifbdev)
 203 {
 204         struct fb_info *info;
 205         struct intel_framebuffer *ifb = &ifbdev->ifb;
 206
 207         if (ifbdev->helper.fbdev) {
 208                 info = ifbdev->helper.fbdev;
 209                 unregister_framebuffer(info);
 210                 iounmap(info->screen_base);
 211                 if (info->cmap.len)
 212                         fb_dealloc_cmap(&info->cmap);
 213                 framebuffer_release(info);
 214         }
 215
 216         drm_fb_helper_fini(&ifbdev->helper);
 217
 218         drm_framebuffer_cleanup(&ifb->base);
 219         if (ifb->obj) {
 220                 drm_gem_object_unreference_unlocked(&ifb->obj->base);
 221                 ifb->obj = NULL;
 222         }
 223 }
 224
 225 int intel_fbdev_init(struct drm_device *dev)
 226 {
 227         struct intel_fbdev *ifbdev;
 228         drm_i915_private_t *dev_priv = dev->dev_private;
 229         int ret;
 230
 231         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 232         if (!ifbdev)
 233                 return -ENOMEM;
 234
 235         dev_priv->fbdev = ifbdev;
 236         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 237
 238         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 239                                  dev_priv->num_pipe,
 240                                  INTELFB_CONN_LIMIT);
 241         if (ret) {
 242                 kfree(ifbdev);
 243                 return ret;
 244         }
 245
 246         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 247         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 248         return 0;
 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 MODULE_LICENSE("GPL and additional rights");
 262
 263 void intel_fb_output_poll_changed(struct drm_device *dev)
 264 {
 265         drm_i915_private_t *dev_priv = dev->dev_private;
 266         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 267 }
 268
 269 void intel_fb_restore_mode(struct drm_device *dev)
 270 {
 271         int ret;
 272         drm_i915_private_t *dev_priv = dev->dev_private;
 273
 274         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 275         if (ret)
 276                 DRM_DEBUG("failed to restore crtc mode\n");
 277 }