93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* Copyright 2012 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/slab.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acpi_bus.h>
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#include "drmP.h"
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#include "drm.h"
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#include "drm_sarea.h"
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#include "drm_crtc_helper.h"
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#include "radeon.h"
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#include "radeon_acpi.h"
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#include <linux/vga_switcheroo.h>
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/* Call the ATIF method
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*
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* Note: currently we discard the output
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*/
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static int radeon_atif_call(acpi_handle handle)
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{
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acpi_status status;
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union acpi_object atif_arg_elements[2];
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struct acpi_object_list atif_arg;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
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atif_arg.count = 2;
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atif_arg.pointer = &atif_arg_elements[0];
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atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
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atif_arg_elements[0].integer.value = ATIF_FUNCTION_VERIFY_INTERFACE;
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atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
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atif_arg_elements[1].integer.value = 0;
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status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
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/* Fail only if calling the method fails and ATIF is supported */
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
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acpi_format_exception(status));
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kfree(buffer.pointer);
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return 1;
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}
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kfree(buffer.pointer);
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return 0;
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}
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/* Call all ACPI methods here */
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int radeon_acpi_init(struct radeon_device *rdev)
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{
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acpi_handle handle;
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int ret;
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/* Get the device handle */
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handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
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/* No need to proceed if we're sure that ATIF is not supported */
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if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
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return 0;
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/* Call the ATIF method */
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ret = radeon_atif_call(handle);
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if (ret)
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return ret;
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return 0;
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}
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