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gerrit-public.fairphone.software / fp2-dev / kernel / msm / 9fd1de52945e06ed88a440c99ca92dab74b9b33c / . / drivers / gpu / drm / nouveau / nouveau_acpi.c
blob: 48227e7447539f281ffc79e40ebd05b517d0c1ae [file] [log] [blame]
Ben Skeggs6ee73862009-12-11 19:24:15 +1000[diff] [blame]1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <acpi/acpi_drivers.h>
4#include <acpi/acpi_bus.h>
5
6#include "drmP.h"
7#include "drm.h"
8#include "drm_sarea.h"
9#include "drm_crtc_helper.h"
10#include "nouveau_drv.h"
11#include "nouveau_drm.h"
12#include "nv50_display.h"
13
14#define NOUVEAU_DSM_SUPPORTED 0x00
15#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00
16
17#define NOUVEAU_DSM_ACTIVE 0x01
18#define NOUVEAU_DSM_ACTIVE_QUERY 0x00
19
20#define NOUVEAU_DSM_LED 0x02
21#define NOUVEAU_DSM_LED_STATE 0x00
22#define NOUVEAU_DSM_LED_OFF 0x10
23#define NOUVEAU_DSM_LED_STAMINA 0x11
24#define NOUVEAU_DSM_LED_SPEED 0x12
25
26#define NOUVEAU_DSM_POWER 0x03
27#define NOUVEAU_DSM_POWER_STATE 0x00
28#define NOUVEAU_DSM_POWER_SPEED 0x01
29#define NOUVEAU_DSM_POWER_STAMINA 0x02
30
31static int nouveau_dsm(struct drm_device *dev, int func, int arg, int *result)
32{
33 static char muid[] = {
34 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
35 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
36 };
37
38 struct pci_dev *pdev = dev->pdev;
39 struct acpi_handle *handle;
40 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
41 struct acpi_object_list input;
42 union acpi_object params[4];
43 union acpi_object *obj;
44 int err;
45
46 handle = DEVICE_ACPI_HANDLE(&pdev->dev);
47
48 if (!handle)
49 return -ENODEV;
50
51 input.count = 4;
52 input.pointer = params;
53 params[0].type = ACPI_TYPE_BUFFER;
54 params[0].buffer.length = sizeof(muid);
55 params[0].buffer.pointer = (char *)muid;
56 params[1].type = ACPI_TYPE_INTEGER;
57 params[1].integer.value = 0x00000102;
58 params[2].type = ACPI_TYPE_INTEGER;
59 params[2].integer.value = func;
60 params[3].type = ACPI_TYPE_INTEGER;
61 params[3].integer.value = arg;
62
63 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
64 if (err) {
65 NV_INFO(dev, "failed to evaluate _DSM: %d\n", err);
66 return err;
67 }
68
69 obj = (union acpi_object *)output.pointer;
70
71 if (obj->type == ACPI_TYPE_INTEGER)
72 if (obj->integer.value == 0x80000002)
73 return -ENODEV;
74
75 if (obj->type == ACPI_TYPE_BUFFER) {
76 if (obj->buffer.length == 4 && result) {
77 *result = 0;
78 *result |= obj->buffer.pointer[0];
79 *result |= (obj->buffer.pointer[1] << 8);
80 *result |= (obj->buffer.pointer[2] << 16);
81 *result |= (obj->buffer.pointer[3] << 24);
82 }
83 }
84
85 kfree(output.pointer);
86 return 0;
87}
88
89int nouveau_hybrid_setup(struct drm_device *dev)
90{
91 int result;
92
Matthew Garrett13876c62010-02-10 20:50:34 +1000[diff] [blame]93 if (nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_STATE,
Ben Skeggs6ee73862009-12-11 19:24:15 +1000[diff] [blame]94 &result))
95 return -ENODEV;
96
97 NV_INFO(dev, "_DSM hardware status gave 0x%x\n", result);
98
Matthew Garrett13876c62010-02-10 20:50:34 +1000[diff] [blame]99 if (result) { /* Ensure that the external GPU is enabled */
100 nouveau_dsm(dev, NOUVEAU_DSM_LED, NOUVEAU_DSM_LED_SPEED, NULL);
101 nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_SPEED,
102 NULL);
103 } else { /* Stamina mode - disable the external GPU */
Ben Skeggs6ee73862009-12-11 19:24:15 +1000[diff] [blame]104 nouveau_dsm(dev, NOUVEAU_DSM_LED, NOUVEAU_DSM_LED_STAMINA,
105 NULL);
106 nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_STAMINA,
107 NULL);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000[diff] [blame]108 }
109
110 return 0;
111}
112
113bool nouveau_dsm_probe(struct drm_device *dev)
114{
115 int support = 0;
116
117 if (nouveau_dsm(dev, NOUVEAU_DSM_SUPPORTED,
118 NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &support))
119 return false;
120
121 if (!support)
122 return false;
123
124 return true;
125}