drivers/gpu/drm/xe/display/intel_fbdev_fb.c

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2023 Intel Corporation
   4  */
   5
   6 #include <drm/drm_fb_helper.h>
   7
   8 #include "intel_display_types.h"
   9 #include "intel_fb.h"
  10 #include "intel_fbdev_fb.h"
  11 #include "xe_bo.h"
  12 #include "xe_ttm_stolen_mgr.h"
  13 #include "xe_wa.h"
  14
  15 #include <generated/xe_wa_oob.h>
  16
  17 struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
  18                                                struct drm_fb_helper_surface_size *sizes)
  19 {
  20         struct drm_framebuffer *fb;
  21         struct drm_device *dev = helper->dev;
  22         struct xe_device *xe = to_xe_device(dev);
  23         struct drm_mode_fb_cmd2 mode_cmd = {};
  24         struct xe_bo *obj;
  25         int size;
  26
  27         /* we don't do packed 24bpp */
  28         if (sizes->surface_bpp == 24)
  29                 sizes->surface_bpp = 32;
  30
  31         mode_cmd.width = sizes->surface_width;
  32         mode_cmd.height = sizes->surface_height;
  33
  34         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
  35                                     DIV_ROUND_UP(sizes->surface_bpp, 8), XE_PAGE_SIZE);
  36         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  37                                                           sizes->surface_depth);
  38
  39         size = mode_cmd.pitches[0] * mode_cmd.height;
  40         size = PAGE_ALIGN(size);
  41         obj = ERR_PTR(-ENODEV);
  42
  43         if (!IS_DGFX(xe) && !XE_WA(xe_root_mmio_gt(xe), 22019338487_display)) {
  44                 obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe),
  45                                            NULL, size,
  46                                            ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
  47                                            XE_BO_FLAG_STOLEN |
  48                                            XE_BO_FLAG_PINNED);
  49                 if (!IS_ERR(obj))
  50                         drm_info(&xe->drm, "Allocated fbdev into stolen\n");
  51                 else
  52                         drm_info(&xe->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(obj));
  53         }
  54
  55         if (IS_ERR(obj)) {
  56                 obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), NULL, size,
  57                                            ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
  58                                            XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) |
  59                                            XE_BO_FLAG_PINNED);
  60         }
  61
  62         if (IS_ERR(obj)) {
  63                 drm_err(&xe->drm, "failed to allocate framebuffer (%pe)\n", obj);
  64                 fb = ERR_PTR(-ENOMEM);
  65                 goto err;
  66         }
  67
  68         fb = intel_framebuffer_create(&obj->ttm.base, &mode_cmd);
  69         if (IS_ERR(fb)) {
  70                 xe_bo_unpin_map_no_vm(obj);
  71                 goto err;
  72         }
  73
  74         drm_gem_object_put(&obj->ttm.base);
  75
  76         return to_intel_framebuffer(fb);
  77
  78 err:
  79         return ERR_CAST(fb);
  80 }
  81
  82 int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
  83                               struct drm_gem_object *_obj, struct i915_vma *vma)
  84 {
  85         struct xe_bo *obj = gem_to_xe_bo(_obj);
  86         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
  87
  88         if (!(obj->flags & XE_BO_FLAG_SYSTEM)) {
  89                 if (obj->flags & XE_BO_FLAG_STOLEN)
  90                         info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
  91                 else
  92                         info->fix.smem_start =
  93                                 pci_resource_start(pdev, 2) +
  94                                 xe_bo_addr(obj, 0, XE_PAGE_SIZE);
  95
  96                 info->fix.smem_len = obj->ttm.base.size;
  97         } else {
  98                 /* XXX: Pure fiction, as the BO may not be physically accessible.. */
  99                 info->fix.smem_start = 0;
 100                 info->fix.smem_len = obj->ttm.base.size;
 101         }
 102         XE_WARN_ON(iosys_map_is_null(&obj->vmap));
 103
 104         info->screen_base = obj->vmap.vaddr_iomem;
 105         info->screen_size = obj->ttm.base.size;
 106
 107         return 0;
 108 }