LXR linux/drivers/gpu/drm/gma500/gma

   1// SPDX-License-Identifier: GPL-2.0-only
   2/**************************************************************************
   3 * Copyright (c) 2011, Intel Corporation.
   4 * All Rights Reserved.
   5 *
   6 **************************************************************************/
   7
   8#include "psb_drv.h"
   9#include "gma_device.h"
  10
  11void gma_get_core_freq(struct drm_device *dev)
  12{
  13        uint32_t clock;
  14        struct pci_dev *pdev = to_pci_dev(dev->dev);
  15        struct pci_dev *pci_root =
  16                pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
  17                                            0, 0);
  18        struct drm_psb_private *dev_priv = dev->dev_private;
  19
  20        /*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
  21        /*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
  22
  23        pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
  24        pci_read_config_dword(pci_root, 0xD4, &clock);
  25        pci_dev_put(pci_root);
  26
  27        switch (clock & 0x07) {
  28        case 0:
  29                dev_priv->core_freq = 100;
  30                break;
  31        case 1:
  32                dev_priv->core_freq = 133;
  33                break;
  34        case 2:
  35                dev_priv->core_freq = 150;
  36                break;
  37        case 3:
  38                dev_priv->core_freq = 178;
  39                break;
  40        case 4:
  41                dev_priv->core_freq = 200;
  42                break;
  43        case 5:
  44        case 6:
  45        case 7:
  46                dev_priv->core_freq = 266;
  47                break;
  48        default:
  49                dev_priv->core_freq = 0;
  50        }
  51}
  52