1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/slab.h>
4#include <acpi/acpi_drivers.h>
5#include <acpi/acpi_bus.h>
6
7#include "drmP.h"
8#include "drm.h"
9#include "drm_sarea.h"
10#include "drm_crtc_helper.h"
11#include "radeon.h"
12
13#include <linux/vga_switcheroo.h>
14
15/* Call the ATIF method
16 *
17 * Note: currently we discard the output
18 */
19static int radeon_atif_call(acpi_handle handle)
20{
21	acpi_status status;
22	union acpi_object atif_arg_elements[2];
23	struct acpi_object_list atif_arg;
24	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
25
26	atif_arg.count = 2;
27	atif_arg.pointer = &atif_arg_elements[0];
28
29	atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
30	atif_arg_elements[0].integer.value = 0;
31	atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
32	atif_arg_elements[1].integer.value = 0;
33
34	status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
35
36	/* Fail only if calling the method fails and ATIF is supported */
37	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
38		DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
39				 acpi_format_exception(status));
40		kfree(buffer.pointer);
41		return 1;
42	}
43
44	kfree(buffer.pointer);
45	return 0;
46}
47
48/* Call all ACPI methods here */
49int radeon_acpi_init(struct radeon_device *rdev)
50{
51	acpi_handle handle;
52	int ret;
53
54	/* Get the device handle */
55	handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
56
57	/* No need to proceed if we're sure that ATIF is not supported */
58	if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
59		return 0;
60
61	/* Call the ATIF method */
62	ret = radeon_atif_call(handle);
63	if (ret)
64		return ret;
65
66	return 0;
67}
68
69