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intel_disable_clock_gating: New tool for turning off clock gating on ILK.

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This is something I sometimes want to do in testing, to see if a
mystery bug (say, 29172) is due to broken clock gating.  Sadly, in
this case it isn't.  Note that it isn't supported on non-ILK chipsets
yet.
This commit is contained in:
Eric Anholt
2010-12-16 16:42:52 -08:00
parent 19b412b37c
commit 253acc34af
4 changed files with 81 additions and 0 deletions
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tools/intel_disable_clock_gating.c
+72
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/*
* Copyright © 2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Zhenyu Wang <zhenyuw@linux.intel.com>
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <err.h>
#include <string.h>
#include "intel_gpu_tools.h"
int main(int argc, char** argv)
{
struct pci_device *pci_dev;
uint32_t temp;
pci_dev = intel_get_pci_device();
intel_get_mmio(pci_dev);
if (IS_IRONLAKE(pci_dev->device_id)) {
printf("Restore method:\n");
printf("intel_reg_write 0x%x 0x%08x\n",
PCH_3DCGDIS0, INREG(PCH_3DCGDIS0));
OUTREG(PCH_3DCGDIS0, 0xffffffff);
printf("intel_reg_write 0x%x 0x%08x\n",
PCH_3DCGDIS1, INREG(PCH_3DCGDIS1));
OUTREG(PCH_3DCGDIS1, 0xffffffff);
printf("intel_reg_write 0x%x 0x%08x\n",
PCH_3DRAMCGDIS0, INREG(PCH_3DRAMCGDIS0));
OUTREG(PCH_3DRAMCGDIS0, 0xffffffff);
printf("intel_reg_write 0x%x 0x%08x\n",
PCH_DSPCLK_GATE_D, INREG(PCH_DSPCLK_GATE_D));
OUTREG(PCH_DSPCLK_GATE_D, 0xffffffff);
printf("intel_reg_write 0x%x 0x%08x\n",
PCH_DSPRAMCLK_GATE_D, INREG(PCH_DSPRAMCLK_GATE_D));
OUTREG(PCH_DSPRAMCLK_GATE_D, 0xffffffff);
} else {
fprintf(stderr, "unsupported chipset\n");
}
return 0;
}