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d7a2952f AM |
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 | */ | |
19 | static 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) { | |
bc96f942 JD |
38 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", |
39 | acpi_format_exception(status)); | |
d7a2952f AM |
40 | kfree(buffer.pointer); |
41 | return 1; | |
42 | } | |
43 | ||
44 | kfree(buffer.pointer); | |
45 | return 0; | |
46 | } | |
47 | ||
48 | /* Call all ACPI methods here */ | |
49 | int radeon_acpi_init(struct radeon_device *rdev) | |
50 | { | |
51 | acpi_handle handle; | |
52 | int ret; | |
53 | ||
d7a2952f AM |
54 | /* Get the device handle */ |
55 | handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); | |
56 | ||
48cc9b2c JD |
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 | ||
d7a2952f AM |
61 | /* Call the ATIF method */ |
62 | ret = radeon_atif_call(handle); | |
63 | if (ret) | |
64 | return ret; | |
65 | ||
66 | return 0; | |
67 | } | |
68 |