52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/**************************************************************************
|
|
* Copyright (c) 2011, Intel Corporation.
|
|
* All Rights Reserved.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#include "psb_drv.h"
|
|
#include "gma_device.h"
|
|
|
|
void gma_get_core_freq(struct drm_device *dev)
|
|
{
|
|
uint32_t clock;
|
|
struct pci_dev *pdev = to_pci_dev(dev->dev);
|
|
struct pci_dev *pci_root =
|
|
pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
|
|
0, 0);
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
|
|
|
/*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
|
|
/*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
|
|
|
|
pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
|
|
pci_read_config_dword(pci_root, 0xD4, &clock);
|
|
pci_dev_put(pci_root);
|
|
|
|
switch (clock & 0x07) {
|
|
case 0:
|
|
dev_priv->core_freq = 100;
|
|
break;
|
|
case 1:
|
|
dev_priv->core_freq = 133;
|
|
break;
|
|
case 2:
|
|
dev_priv->core_freq = 150;
|
|
break;
|
|
case 3:
|
|
dev_priv->core_freq = 178;
|
|
break;
|
|
case 4:
|
|
dev_priv->core_freq = 200;
|
|
break;
|
|
case 5:
|
|
case 6:
|
|
case 7:
|
|
dev_priv->core_freq = 266;
|
|
break;
|
|
default:
|
|
dev_priv->core_freq = 0;
|
|
}
|
|
}
|