68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
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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 <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 = 0;
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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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printk(KERN_INFO "failed to evaluate ATIF got %s\n", 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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/* No need to proceed if we're sure that ATIF is not supported */
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if (!ASIC_IS_AVIVO(rdev) || !rdev->bios)
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return 0;
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/* Get the device handle */
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handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
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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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