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_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         info = framebuffer_alloc(0, device);
 103         if (!info) {
 104                 ret = -ENOMEM;
 105                 goto out_unpin;
 106         }
 107
 108         info->par = ifbdev;
 109
 110         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
 111         if (ret)
 112                 goto out_unpin;
 113
 114         fb = &ifbdev->ifb.base;
 115
 116         ifbdev->helper.fb = fb;
 117         ifbdev->helper.fbdev = info;
 118
 119         strcpy(info->fix.id, "inteldrmfb");
 120
 121         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 122         info->fbops = &intelfb_ops;
 123
 124         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 125         if (ret) {
 126                 ret = -ENOMEM;
 127                 goto out_unpin;
 128         }
 129         /* setup aperture base/size for vesafb takeover */
 130         info->apertures = alloc_apertures(1);
 131         if (!info->apertures) {
 132                 ret = -ENOMEM;
 133                 goto out_unpin;
 134         }
 135         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 136         info->apertures->ranges[0].size =
 137                 dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
 138
 139         info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
 140         info->fix.smem_len = size;
 141
 142         info->screen_base =
 143                 ioremap_wc(dev_priv->mm.gtt_base_addr + obj->gtt_offset,
 144                            size);
 145         if (!info->screen_base) {
 146                 ret = -ENOSPC;
 147                 goto out_unpin;
 148         }
 149         info->screen_size = size;
 150
 151 //      memset(info->screen_base, 0, size);
 152
 153         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 154         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 155
 156         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 157
 158         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 159                       fb->width, fb->height,
 160                       obj->gtt_offset, obj);
 161
 162
 163         mutex_unlock(&dev->struct_mutex);
 164         vga_switcheroo_client_fb_set(dev->pdev, info);
 165         return 0;
 166
 167 out_unpin:
 168         i915_gem_object_unpin(obj);
 169 out_unref:
 170         drm_gem_object_unreference(&obj->base);
 171         mutex_unlock(&dev->struct_mutex);
 172 out:
 173         return ret;
 174 }
 175
 176 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 177                                           struct drm_fb_helper_surface_size *sizes)
 178 {
 179         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 180         int new_fb = 0;
 181         int ret;
 182
 183         if (!helper->fb) {
 184                 ret = intelfb_create(ifbdev, sizes);
 185                 if (ret)
 186                         return ret;
 187                 new_fb = 1;
 188         }
 189         return new_fb;
 190 }
 191
 192 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 193         .gamma_set = intel_crtc_fb_gamma_set,
 194         .gamma_get = intel_crtc_fb_gamma_get,
 195         .fb_probe = intel_fb_find_or_create_single,
 196 };
 197
 198 static void intel_fbdev_destroy(struct drm_device *dev,
 199                                 struct intel_fbdev *ifbdev)
 200 {
 201         struct fb_info *info;
 202         struct intel_framebuffer *ifb = &ifbdev->ifb;
 203
 204         if (ifbdev->helper.fbdev) {
 205                 info = ifbdev->helper.fbdev;
 206                 unregister_framebuffer(info);
 207                 iounmap(info->screen_base);
 208                 if (info->cmap.len)
 209                         fb_dealloc_cmap(&info->cmap);
 210                 framebuffer_release(info);
 211         }
 212
 213         drm_fb_helper_fini(&ifbdev->helper);
 214
 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 int intel_fbdev_init(struct drm_device *dev)
 223 {
 224         struct intel_fbdev *ifbdev;
 225         drm_i915_private_t *dev_priv = dev->dev_private;
 226         int ret;
 227
 228         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 229         if (!ifbdev)
 230                 return -ENOMEM;
 231
 232         dev_priv->fbdev = ifbdev;
 233         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 234
 235         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 236                                  dev_priv->num_pipe,
 237                                  INTELFB_CONN_LIMIT);
 238         if (ret) {
 239                 kfree(ifbdev);
 240                 return ret;
 241         }
 242
 243         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 244         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 245         return 0;
 246 }
 247
 248 void intel_fbdev_fini(struct drm_device *dev)
 249 {
 250         drm_i915_private_t *dev_priv = dev->dev_private;
 251         if (!dev_priv->fbdev)
 252                 return;
 253
 254         intel_fbdev_destroy(dev, dev_priv->fbdev);
 255         kfree(dev_priv->fbdev);
 256         dev_priv->fbdev = NULL;
 257 }
 258
 259 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 260 {
 261         drm_i915_private_t *dev_priv = dev->dev_private;
 262         if (!dev_priv->fbdev)
 263                 return;
 264
 265         fb_set_suspend(dev_priv->fbdev->helper.fbdev, state);
 266 }
 267
 268 MODULE_LICENSE("GPL and additional rights");
 269
 270 void intel_fb_output_poll_changed(struct drm_device *dev)
 271 {
 272         drm_i915_private_t *dev_priv = dev->dev_private;
 273         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 274 }
 275
 276 void intel_fb_restore_mode(struct drm_device *dev)
 277 {
 278         int ret;
 279         drm_i915_private_t *dev_priv = dev->dev_private;
 280         struct drm_mode_config *config = &dev->mode_config;
 281         struct drm_plane *plane;
 282
 283         mutex_lock(&dev->mode_config.mutex);
 284
 285         ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 286         if (ret)
 287                 DRM_DEBUG("failed to restore crtc mode\n");
 288
 289         /* Be sure to shut off any planes that may be active */
 290         list_for_each_entry(plane, &config->plane_list, head)
 291                 plane->funcs->disable_plane(plane);
 292
 293         mutex_unlock(&dev->mode_config.mutex);
 294 }