drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Hisilicon Hibmc SoC drm driver
   3  *
   4  * Based on the bochs drm driver.
   5  *
   6  * Copyright (c) 2016 Huawei Limited.
   7  *
   8  * Author:
   9  *      Rongrong Zou <zourongrong@huawei.com>
  10  *      Rongrong Zou <zourongrong@gmail.com>
  11  *      Jianhua Li <lijianhua@huawei.com>
  12  */
  13
  14 #include <linux/pci.h>
  15
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_gem.h>
  18 #include <drm/drm_gem_framebuffer_helper.h>
  19 #include <drm/drm_gem_vram_helper.h>
  20 #include <drm/drm_print.h>
  21
  22 #include "hibmc_drm_drv.h"
  23
  24 int hibmc_mm_init(struct hibmc_drm_private *hibmc)
  25 {
  26         struct drm_vram_mm *vmm;
  27         int ret;
  28         struct drm_device *dev = hibmc->dev;
  29
  30         vmm = drm_vram_helper_alloc_mm(dev,
  31                                        pci_resource_start(dev->pdev, 0),
  32                                        hibmc->fb_size);
  33         if (IS_ERR(vmm)) {
  34                 ret = PTR_ERR(vmm);
  35                 drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
  36                 return ret;
  37         }
  38
  39         return 0;
  40 }
  41
  42 void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
  43 {
  44         if (!hibmc->dev->vram_mm)
  45                 return;
  46
  47         drm_vram_helper_release_mm(hibmc->dev);
  48 }
  49
  50 int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
  51                       struct drm_mode_create_dumb *args)
  52 {
  53         return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
  54 }
  55
  56 const struct drm_mode_config_funcs hibmc_mode_funcs = {
  57         .mode_valid = drm_vram_helper_mode_valid,
  58         .atomic_check = drm_atomic_helper_check,
  59         .atomic_commit = drm_atomic_helper_commit,
  60         .fb_create = drm_gem_fb_create,
  61 };