mirror of https://gitee.com/openkylin/linux.git
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/**************************************************************************
|
|
* Copyright (c) 2011, Intel Corporation.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#include <drm/drmP.h>
|
|
#include "psb_drv.h"
|
|
|
|
void gma_get_core_freq(struct drm_device *dev)
|
|
{
|
|
uint32_t clock;
|
|
struct pci_dev *pci_root = pci_get_bus_and_slot(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;
|
|
}
|
|
}
|