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efd4e418 AD |
1 | /* |
2 | * Copyright 2012 Advanced Micro Devices, Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | */ | |
23 | ||
d7a2952f AM |
24 | #include <linux/pci.h> |
25 | #include <linux/acpi.h> | |
26 | #include <linux/slab.h> | |
27 | #include <acpi/acpi_drivers.h> | |
28 | #include <acpi/acpi_bus.h> | |
29 | ||
30 | #include "drmP.h" | |
31 | #include "drm.h" | |
32 | #include "drm_sarea.h" | |
33 | #include "drm_crtc_helper.h" | |
34 | #include "radeon.h" | |
9e05b2f4 | 35 | #include "radeon_acpi.h" |
d7a2952f AM |
36 | |
37 | #include <linux/vga_switcheroo.h> | |
38 | ||
39 | /* Call the ATIF method | |
40 | * | |
41 | * Note: currently we discard the output | |
42 | */ | |
43 | static int radeon_atif_call(acpi_handle handle) | |
44 | { | |
45 | acpi_status status; | |
46 | union acpi_object atif_arg_elements[2]; | |
47 | struct acpi_object_list atif_arg; | |
48 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; | |
49 | ||
50 | atif_arg.count = 2; | |
51 | atif_arg.pointer = &atif_arg_elements[0]; | |
52 | ||
53 | atif_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
9e05b2f4 | 54 | atif_arg_elements[0].integer.value = ATIF_FUNCTION_VERIFY_INTERFACE; |
d7a2952f AM |
55 | atif_arg_elements[1].type = ACPI_TYPE_INTEGER; |
56 | atif_arg_elements[1].integer.value = 0; | |
57 | ||
58 | status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); | |
59 | ||
60 | /* Fail only if calling the method fails and ATIF is supported */ | |
61 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
bc96f942 JD |
62 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", |
63 | acpi_format_exception(status)); | |
d7a2952f AM |
64 | kfree(buffer.pointer); |
65 | return 1; | |
66 | } | |
67 | ||
68 | kfree(buffer.pointer); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | /* Call all ACPI methods here */ | |
73 | int radeon_acpi_init(struct radeon_device *rdev) | |
74 | { | |
75 | acpi_handle handle; | |
76 | int ret; | |
77 | ||
d7a2952f AM |
78 | /* Get the device handle */ |
79 | handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); | |
80 | ||
48cc9b2c JD |
81 | /* No need to proceed if we're sure that ATIF is not supported */ |
82 | if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) | |
83 | return 0; | |
84 | ||
d7a2952f AM |
85 | /* Call the ATIF method */ |
86 | ret = radeon_atif_call(handle); | |
87 | if (ret) | |
88 | return ret; | |
89 | ||
90 | return 0; | |
91 | } | |
92 |