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6ee73861 BS |
1 | #include <linux/pci.h> |
2 | #include <linux/acpi.h> | |
5a0e3ad6 | 3 | #include <linux/slab.h> |
6ee73861 BS |
4 | #include <acpi/acpi_drivers.h> |
5 | #include <acpi/acpi_bus.h> | |
a6ed76d7 | 6 | #include <acpi/video.h> |
6ee73861 BS |
7 | |
8 | #include "drmP.h" | |
9 | #include "drm.h" | |
10 | #include "drm_sarea.h" | |
11 | #include "drm_crtc_helper.h" | |
12 | #include "nouveau_drv.h" | |
13 | #include "nouveau_drm.h" | |
14 | #include "nv50_display.h" | |
a6ed76d7 | 15 | #include "nouveau_connector.h" |
6ee73861 | 16 | |
6a9ee8af DA |
17 | #include <linux/vga_switcheroo.h> |
18 | ||
6ee73861 BS |
19 | #define NOUVEAU_DSM_SUPPORTED 0x00 |
20 | #define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00 | |
21 | ||
22 | #define NOUVEAU_DSM_ACTIVE 0x01 | |
23 | #define NOUVEAU_DSM_ACTIVE_QUERY 0x00 | |
24 | ||
25 | #define NOUVEAU_DSM_LED 0x02 | |
26 | #define NOUVEAU_DSM_LED_STATE 0x00 | |
27 | #define NOUVEAU_DSM_LED_OFF 0x10 | |
28 | #define NOUVEAU_DSM_LED_STAMINA 0x11 | |
29 | #define NOUVEAU_DSM_LED_SPEED 0x12 | |
30 | ||
31 | #define NOUVEAU_DSM_POWER 0x03 | |
32 | #define NOUVEAU_DSM_POWER_STATE 0x00 | |
33 | #define NOUVEAU_DSM_POWER_SPEED 0x01 | |
34 | #define NOUVEAU_DSM_POWER_STAMINA 0x02 | |
35 | ||
6a9ee8af DA |
36 | static struct nouveau_dsm_priv { |
37 | bool dsm_detected; | |
38 | acpi_handle dhandle; | |
afeb3e11 | 39 | acpi_handle rom_handle; |
6a9ee8af DA |
40 | } nouveau_dsm_priv; |
41 | ||
42 | static const char nouveau_dsm_muid[] = { | |
43 | 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D, | |
44 | 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4, | |
45 | }; | |
6ee73861 | 46 | |
6e86e041 | 47 | static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result) |
6a9ee8af | 48 | { |
6ee73861 BS |
49 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; |
50 | struct acpi_object_list input; | |
51 | union acpi_object params[4]; | |
52 | union acpi_object *obj; | |
53 | int err; | |
54 | ||
6ee73861 BS |
55 | input.count = 4; |
56 | input.pointer = params; | |
57 | params[0].type = ACPI_TYPE_BUFFER; | |
6a9ee8af DA |
58 | params[0].buffer.length = sizeof(nouveau_dsm_muid); |
59 | params[0].buffer.pointer = (char *)nouveau_dsm_muid; | |
6ee73861 BS |
60 | params[1].type = ACPI_TYPE_INTEGER; |
61 | params[1].integer.value = 0x00000102; | |
62 | params[2].type = ACPI_TYPE_INTEGER; | |
63 | params[2].integer.value = func; | |
64 | params[3].type = ACPI_TYPE_INTEGER; | |
65 | params[3].integer.value = arg; | |
66 | ||
67 | err = acpi_evaluate_object(handle, "_DSM", &input, &output); | |
68 | if (err) { | |
6a9ee8af | 69 | printk(KERN_INFO "failed to evaluate _DSM: %d\n", err); |
6ee73861 BS |
70 | return err; |
71 | } | |
72 | ||
73 | obj = (union acpi_object *)output.pointer; | |
74 | ||
75 | if (obj->type == ACPI_TYPE_INTEGER) | |
76 | if (obj->integer.value == 0x80000002) | |
77 | return -ENODEV; | |
78 | ||
79 | if (obj->type == ACPI_TYPE_BUFFER) { | |
80 | if (obj->buffer.length == 4 && result) { | |
81 | *result = 0; | |
82 | *result |= obj->buffer.pointer[0]; | |
83 | *result |= (obj->buffer.pointer[1] << 8); | |
84 | *result |= (obj->buffer.pointer[2] << 16); | |
85 | *result |= (obj->buffer.pointer[3] << 24); | |
86 | } | |
87 | } | |
88 | ||
89 | kfree(output.pointer); | |
90 | return 0; | |
91 | } | |
92 | ||
6a9ee8af | 93 | static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id) |
6ee73861 | 94 | { |
6a9ee8af DA |
95 | return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL); |
96 | } | |
97 | ||
98 | static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state) | |
99 | { | |
100 | int arg; | |
101 | if (state == VGA_SWITCHEROO_ON) | |
102 | arg = NOUVEAU_DSM_POWER_SPEED; | |
103 | else | |
104 | arg = NOUVEAU_DSM_POWER_STAMINA; | |
105 | nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id) | |
110 | { | |
111 | if (id == VGA_SWITCHEROO_IGD) | |
fc5ea29d | 112 | return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA); |
6a9ee8af | 113 | else |
fc5ea29d | 114 | return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED); |
6a9ee8af | 115 | } |
6ee73861 | 116 | |
6a9ee8af DA |
117 | static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id, |
118 | enum vga_switcheroo_state state) | |
119 | { | |
120 | if (id == VGA_SWITCHEROO_IGD) | |
121 | return 0; | |
122 | ||
fc5ea29d | 123 | return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state); |
6a9ee8af DA |
124 | } |
125 | ||
126 | static int nouveau_dsm_init(void) | |
127 | { | |
6ee73861 BS |
128 | return 0; |
129 | } | |
130 | ||
6a9ee8af | 131 | static int nouveau_dsm_get_client_id(struct pci_dev *pdev) |
6ee73861 | 132 | { |
6a9ee8af DA |
133 | if (nouveau_dsm_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev)) |
134 | return VGA_SWITCHEROO_IGD; | |
135 | else | |
136 | return VGA_SWITCHEROO_DIS; | |
137 | } | |
138 | ||
139 | static struct vga_switcheroo_handler nouveau_dsm_handler = { | |
140 | .switchto = nouveau_dsm_switchto, | |
141 | .power_state = nouveau_dsm_power_state, | |
142 | .init = nouveau_dsm_init, | |
143 | .get_client_id = nouveau_dsm_get_client_id, | |
144 | }; | |
6ee73861 | 145 | |
6a9ee8af DA |
146 | static bool nouveau_dsm_pci_probe(struct pci_dev *pdev) |
147 | { | |
148 | acpi_handle dhandle, nvidia_handle; | |
149 | acpi_status status; | |
150 | int ret; | |
151 | uint32_t result; | |
152 | ||
153 | dhandle = DEVICE_ACPI_HANDLE(&pdev->dev); | |
154 | if (!dhandle) | |
155 | return false; | |
afeb3e11 | 156 | |
6a9ee8af DA |
157 | status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle); |
158 | if (ACPI_FAILURE(status)) { | |
6ee73861 | 159 | return false; |
6a9ee8af | 160 | } |
6ee73861 | 161 | |
fc5ea29d DA |
162 | ret = nouveau_dsm(dhandle, NOUVEAU_DSM_SUPPORTED, |
163 | NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result); | |
6a9ee8af | 164 | if (ret < 0) |
6ee73861 BS |
165 | return false; |
166 | ||
6a9ee8af | 167 | nouveau_dsm_priv.dhandle = dhandle; |
6ee73861 BS |
168 | return true; |
169 | } | |
6a9ee8af DA |
170 | |
171 | static bool nouveau_dsm_detect(void) | |
172 | { | |
173 | char acpi_method_name[255] = { 0 }; | |
174 | struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name}; | |
175 | struct pci_dev *pdev = NULL; | |
176 | int has_dsm = 0; | |
177 | int vga_count = 0; | |
afeb3e11 | 178 | |
6a9ee8af DA |
179 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { |
180 | vga_count++; | |
181 | ||
182 | has_dsm |= (nouveau_dsm_pci_probe(pdev) == true); | |
183 | } | |
184 | ||
185 | if (vga_count == 2 && has_dsm) { | |
fc5ea29d | 186 | acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, &buffer); |
6a9ee8af DA |
187 | printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n", |
188 | acpi_method_name); | |
189 | nouveau_dsm_priv.dsm_detected = true; | |
190 | return true; | |
191 | } | |
192 | return false; | |
193 | } | |
194 | ||
195 | void nouveau_register_dsm_handler(void) | |
196 | { | |
197 | bool r; | |
198 | ||
199 | r = nouveau_dsm_detect(); | |
200 | if (!r) | |
201 | return; | |
202 | ||
203 | vga_switcheroo_register_handler(&nouveau_dsm_handler); | |
204 | } | |
205 | ||
206 | void nouveau_unregister_dsm_handler(void) | |
207 | { | |
208 | vga_switcheroo_unregister_handler(); | |
209 | } | |
afeb3e11 DA |
210 | |
211 | /* retrieve the ROM in 4k blocks */ | |
212 | static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios, | |
213 | int offset, int len) | |
214 | { | |
215 | acpi_status status; | |
216 | union acpi_object rom_arg_elements[2], *obj; | |
217 | struct acpi_object_list rom_arg; | |
218 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; | |
219 | ||
220 | rom_arg.count = 2; | |
221 | rom_arg.pointer = &rom_arg_elements[0]; | |
222 | ||
223 | rom_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
224 | rom_arg_elements[0].integer.value = offset; | |
225 | ||
226 | rom_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
227 | rom_arg_elements[1].integer.value = len; | |
228 | ||
229 | status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer); | |
230 | if (ACPI_FAILURE(status)) { | |
231 | printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status)); | |
232 | return -ENODEV; | |
233 | } | |
234 | obj = (union acpi_object *)buffer.pointer; | |
235 | memcpy(bios+offset, obj->buffer.pointer, len); | |
236 | kfree(buffer.pointer); | |
237 | return len; | |
238 | } | |
239 | ||
240 | bool nouveau_acpi_rom_supported(struct pci_dev *pdev) | |
241 | { | |
242 | acpi_status status; | |
243 | acpi_handle dhandle, rom_handle; | |
244 | ||
245 | if (!nouveau_dsm_priv.dsm_detected) | |
246 | return false; | |
247 | ||
248 | dhandle = DEVICE_ACPI_HANDLE(&pdev->dev); | |
249 | if (!dhandle) | |
250 | return false; | |
251 | ||
252 | status = acpi_get_handle(dhandle, "_ROM", &rom_handle); | |
253 | if (ACPI_FAILURE(status)) | |
254 | return false; | |
255 | ||
256 | nouveau_dsm_priv.rom_handle = rom_handle; | |
257 | return true; | |
258 | } | |
259 | ||
260 | int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) | |
261 | { | |
262 | return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len); | |
263 | } | |
a6ed76d7 BS |
264 | |
265 | int | |
266 | nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) | |
267 | { | |
268 | struct nouveau_connector *nv_connector = nouveau_connector(connector); | |
269 | struct acpi_device *acpidev; | |
270 | acpi_handle handle; | |
271 | int type, ret; | |
272 | void *edid; | |
273 | ||
274 | switch (connector->connector_type) { | |
275 | case DRM_MODE_CONNECTOR_LVDS: | |
276 | case DRM_MODE_CONNECTOR_eDP: | |
277 | type = ACPI_VIDEO_DISPLAY_LCD; | |
278 | break; | |
279 | default: | |
280 | return -EINVAL; | |
281 | } | |
282 | ||
283 | handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev); | |
284 | if (!handle) | |
285 | return -ENODEV; | |
286 | ||
287 | ret = acpi_bus_get_device(handle, &acpidev); | |
288 | if (ret) | |
289 | return -ENODEV; | |
290 | ||
291 | ret = acpi_video_get_edid(acpidev, type, -1, &edid); | |
292 | if (ret < 0) | |
293 | return ret; | |
294 | ||
295 | nv_connector->edid = edid; | |
296 | return 0; | |
297 | } |