mirror of https://gitee.com/openkylin/linux.git
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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**************************************************************************/
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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 =
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pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus),
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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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