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  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. struct drm_i915_gem_object *fb_obj;
  47.  
  48. struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
  49. {
  50. #define BYTES_PER_LONG (BITS_PER_LONG/8)
  51. #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
  52.     int fb_info_size = sizeof(struct fb_info);
  53.     struct fb_info *info;
  54.     char *p;
  55.  
  56.     if (size)
  57.         fb_info_size += PADDING;
  58.  
  59.     p = kzalloc(fb_info_size + size, GFP_KERNEL);
  60.  
  61.     if (!p)
  62.         return NULL;
  63.  
  64.     info = (struct fb_info *) p;
  65.  
  66.     if (size)
  67.         info->par = p + fb_info_size;
  68.  
  69.     return info;
  70. #undef PADDING
  71. #undef BYTES_PER_LONG
  72. }
  73.  
  74.  
  75. static struct fb_ops intelfb_ops = {
  76.         .owner = THIS_MODULE,
  77.         .fb_check_var = drm_fb_helper_check_var,
  78.         .fb_set_par = drm_fb_helper_set_par,
  79. //   .fb_fillrect = cfb_fillrect,
  80. //   .fb_copyarea = cfb_copyarea,
  81. //   .fb_imageblit = cfb_imageblit,
  82. //   .fb_pan_display = drm_fb_helper_pan_display,
  83.         .fb_blank = drm_fb_helper_blank,
  84. //   .fb_setcmap = drm_fb_helper_setcmap,
  85. //   .fb_debug_enter = drm_fb_helper_debug_enter,
  86. //   .fb_debug_leave = drm_fb_helper_debug_leave,
  87. };
  88.  
  89. static int intelfb_create(struct drm_fb_helper *helper,
  90.                           struct drm_fb_helper_surface_size *sizes)
  91. {
  92.         struct intel_fbdev *ifbdev =
  93.                 container_of(helper, struct intel_fbdev, helper);
  94.         struct drm_device *dev = helper->dev;
  95.         struct drm_i915_private *dev_priv = dev->dev_private;
  96.         struct fb_info *info;
  97.         struct drm_framebuffer *fb;
  98.         struct drm_mode_fb_cmd2 mode_cmd = {};
  99.         struct drm_i915_gem_object *obj;
  100.         struct device *device = &dev->pdev->dev;
  101.         int size, ret;
  102.  
  103.         /* we don't do packed 24bpp */
  104.         if (sizes->surface_bpp == 24)
  105.                 sizes->surface_bpp = 32;
  106.  
  107.         mode_cmd.width = sizes->surface_width;
  108.         mode_cmd.height = sizes->surface_height;
  109.  
  110.         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((sizes->surface_bpp + 7) /
  111.                               8), 512);
  112.         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  113.                                                           sizes->surface_depth);
  114.  
  115.         size = mode_cmd.pitches[0] * mode_cmd.height;
  116.         size = ALIGN(size, PAGE_SIZE);
  117.         obj = fb_obj;
  118.         if (!obj) {
  119.                 DRM_ERROR("failed to allocate framebuffer\n");
  120.                 ret = -ENOMEM;
  121.                 goto out;
  122.         }
  123.  
  124.     obj->stride = mode_cmd.pitches[0];
  125.  
  126.         mutex_lock(&dev->struct_mutex);
  127.  
  128.         /* Flush everything out, we'll be doing GTT only from now on */
  129.         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
  130.         if (ret) {
  131.                 DRM_ERROR("failed to pin fb: %d\n", ret);
  132.                 goto out_unref;
  133.         }
  134.  
  135.         info = framebuffer_alloc(0, device);
  136.         if (!info) {
  137.                 ret = -ENOMEM;
  138.                 goto out_unpin;
  139.         }
  140.  
  141.         info->par = helper;
  142.  
  143.         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
  144.         if (ret)
  145.                 goto out_unpin;
  146.  
  147.         fb = &ifbdev->ifb.base;
  148.  
  149.         ifbdev->helper.fb = fb;
  150.         ifbdev->helper.fbdev = info;
  151.  
  152.     strcpy(info->fix.id, "inteldrmfb");
  153.  
  154.     info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
  155.     info->fbops = &intelfb_ops;
  156.  
  157.     /* setup aperture base/size for vesafb takeover */
  158.         info->apertures = alloc_apertures(1);
  159.         if (!info->apertures) {
  160.                 ret = -ENOMEM;
  161.                 goto out_unpin;
  162.         }
  163.         info->apertures->ranges[0].base = dev->mode_config.fb_base;
  164.         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
  165.  
  166.         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
  167.         info->fix.smem_len = size;
  168.  
  169.         info->screen_base = (void*) 0xFE000000;
  170.         info->screen_size = size;
  171.  
  172.         /* This driver doesn't need a VT switch to restore the mode on resume */
  173.         info->skip_vt_switch = true;
  174.  
  175.         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
  176.         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
  177.  
  178.         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
  179.  
  180.         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
  181.                       fb->width, fb->height,
  182.                       i915_gem_obj_ggtt_offset(obj), obj);
  183.  
  184.  
  185.         mutex_unlock(&dev->struct_mutex);
  186.         return 0;
  187.  
  188. out_unpin:
  189.         i915_gem_object_unpin(obj);
  190. out_unref:
  191.         drm_gem_object_unreference(&obj->base);
  192.         mutex_unlock(&dev->struct_mutex);
  193. out:
  194.         return ret;
  195. }
  196.  
  197. static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
  198.         .gamma_set = intel_crtc_fb_gamma_set,
  199.         .gamma_get = intel_crtc_fb_gamma_get,
  200.         .fb_probe = intelfb_create,
  201. };
  202.  
  203.  
  204. int intel_fbdev_init(struct drm_device *dev)
  205. {
  206.         struct intel_fbdev *ifbdev;
  207.         struct drm_i915_private *dev_priv = dev->dev_private;
  208.         int ret;
  209.  
  210.         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
  211.         if (!ifbdev)
  212.                 return -ENOMEM;
  213.  
  214.         dev_priv->fbdev = ifbdev;
  215.         ifbdev->helper.funcs = &intel_fb_helper_funcs;
  216.  
  217.         ret = drm_fb_helper_init(dev, &ifbdev->helper,
  218.                                  INTEL_INFO(dev)->num_pipes,
  219.                                  INTELFB_CONN_LIMIT);
  220.         if (ret) {
  221.                 kfree(ifbdev);
  222.                 return ret;
  223.         }
  224.  
  225.         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
  226.  
  227.     return 0;
  228. }
  229.  
  230. void intel_fbdev_initial_config(struct drm_device *dev)
  231. {
  232.         struct drm_i915_private *dev_priv = dev->dev_private;
  233.  
  234.         /* Due to peculiar init order wrt to hpd handling this is separate. */
  235.         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
  236. }
  237.  
  238. void intel_fb_output_poll_changed(struct drm_device *dev)
  239. {
  240.         struct drm_i915_private *dev_priv = dev->dev_private;
  241.         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
  242. }
  243.