mirror of https://gitee.com/openkylin/linux.git
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
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/**************************************************************************
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* Copyright (c) 2011, Intel Corporation.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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**************************************************************************/
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#include <drm/drmP.h>
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#include "psb_drv.h"
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void gma_get_core_freq(struct drm_device *dev)
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{
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uint32_t clock;
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struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
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struct drm_psb_private *dev_priv = dev->dev_private;
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/*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
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/*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
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pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
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pci_read_config_dword(pci_root, 0xD4, &clock);
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pci_dev_put(pci_root);
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switch (clock & 0x07) {
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case 0:
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dev_priv->core_freq = 100;
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break;
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case 1:
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dev_priv->core_freq = 133;
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break;
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case 2:
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dev_priv->core_freq = 150;
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break;
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case 3:
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dev_priv->core_freq = 178;
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break;
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case 4:
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dev_priv->core_freq = 200;
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break;
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case 5:
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case 6:
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case 7:
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dev_priv->core_freq = 266;
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break;
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default:
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dev_priv->core_freq = 0;
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}
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}
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