Commit | Line | Data |
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6ee73861 BS |
1 | #include <linux/pci.h> |
2 | #include <linux/acpi.h> | |
5a0e3ad6 | 3 | #include <linux/slab.h> |
8116188f | 4 | #include <linux/mxm-wmi.h> |
6a9ee8af | 5 | #include <linux/vga_switcheroo.h> |
612a9aab | 6 | #include <drm/drm_edid.h> |
8b48463f | 7 | #include <acpi/video.h> |
c0077061 | 8 | |
4dc28134 | 9 | #include "nouveau_drv.h" |
c0077061 BS |
10 | #include "nouveau_acpi.h" |
11 | ||
6ee73861 BS |
12 | #define NOUVEAU_DSM_LED 0x02 |
13 | #define NOUVEAU_DSM_LED_STATE 0x00 | |
14 | #define NOUVEAU_DSM_LED_OFF 0x10 | |
15 | #define NOUVEAU_DSM_LED_STAMINA 0x11 | |
16 | #define NOUVEAU_DSM_LED_SPEED 0x12 | |
17 | ||
18 | #define NOUVEAU_DSM_POWER 0x03 | |
19 | #define NOUVEAU_DSM_POWER_STATE 0x00 | |
20 | #define NOUVEAU_DSM_POWER_SPEED 0x01 | |
21 | #define NOUVEAU_DSM_POWER_STAMINA 0x02 | |
22 | ||
5addcf0a DA |
23 | #define NOUVEAU_DSM_OPTIMUS_CAPS 0x1A |
24 | #define NOUVEAU_DSM_OPTIMUS_FLAGS 0x1B | |
25 | ||
26 | #define NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 (3 << 24) | |
27 | #define NOUVEAU_DSM_OPTIMUS_NO_POWERDOWN_PS3 (2 << 24) | |
28 | #define NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED (1) | |
29 | ||
30 | #define NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN (NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 | NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED) | |
31 | ||
32 | /* result of the optimus caps function */ | |
33 | #define OPTIMUS_ENABLED (1 << 0) | |
34 | #define OPTIMUS_STATUS_MASK (3 << 3) | |
35 | #define OPTIMUS_STATUS_OFF (0 << 3) | |
36 | #define OPTIMUS_STATUS_ON_ENABLED (1 << 3) | |
37 | #define OPTIMUS_STATUS_PWR_STABLE (3 << 3) | |
38 | #define OPTIMUS_DISPLAY_HOTPLUG (1 << 6) | |
39 | #define OPTIMUS_CAPS_MASK (7 << 24) | |
40 | #define OPTIMUS_DYNAMIC_PWR_CAP (1 << 24) | |
41 | ||
42 | #define OPTIMUS_AUDIO_CAPS_MASK (3 << 27) | |
43 | #define OPTIMUS_HDA_CODEC_MASK (2 << 27) /* hda bios control */ | |
d099230c | 44 | |
6a9ee8af DA |
45 | static struct nouveau_dsm_priv { |
46 | bool dsm_detected; | |
f19467c5 | 47 | bool optimus_detected; |
cba97805 | 48 | bool optimus_flags_detected; |
692a17dc | 49 | bool optimus_skip_dsm; |
6a9ee8af | 50 | acpi_handle dhandle; |
afeb3e11 | 51 | acpi_handle rom_handle; |
6a9ee8af DA |
52 | } nouveau_dsm_priv; |
53 | ||
c839d748 DA |
54 | bool nouveau_is_optimus(void) { |
55 | return nouveau_dsm_priv.optimus_detected; | |
56 | } | |
57 | ||
58 | bool nouveau_is_v1_dsm(void) { | |
59 | return nouveau_dsm_priv.dsm_detected; | |
60 | } | |
61 | ||
d0ce7b85 | 62 | #ifdef CONFIG_VGA_SWITCHEROO |
94116f81 AS |
63 | static const guid_t nouveau_dsm_muid = |
64 | GUID_INIT(0x9D95A0A0, 0x0060, 0x4D48, | |
65 | 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4); | |
6ee73861 | 66 | |
94116f81 AS |
67 | static const guid_t nouveau_op_dsm_muid = |
68 | GUID_INIT(0xA486D8F8, 0x0BDA, 0x471B, | |
69 | 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0); | |
f19467c5 DA |
70 | |
71 | static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result) | |
72 | { | |
b072e53b | 73 | int i; |
f19467c5 | 74 | union acpi_object *obj; |
d099230c | 75 | char args_buff[4]; |
b072e53b JL |
76 | union acpi_object argv4 = { |
77 | .buffer.type = ACPI_TYPE_BUFFER, | |
78 | .buffer.length = 4, | |
79 | .buffer.pointer = args_buff | |
80 | }; | |
f19467c5 | 81 | |
d099230c PL |
82 | /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */ |
83 | for (i = 0; i < 4; i++) | |
84 | args_buff[i] = (arg >> i * 8) & 0xFF; | |
f19467c5 | 85 | |
b072e53b | 86 | *result = 0; |
94116f81 | 87 | obj = acpi_evaluate_dsm_typed(handle, &nouveau_op_dsm_muid, 0x00000100, |
b072e53b JL |
88 | func, &argv4, ACPI_TYPE_BUFFER); |
89 | if (!obj) { | |
90 | acpi_handle_info(handle, "failed to evaluate _DSM\n"); | |
91 | return AE_ERROR; | |
92 | } else { | |
93 | if (obj->buffer.length == 4) { | |
f19467c5 DA |
94 | *result |= obj->buffer.pointer[0]; |
95 | *result |= (obj->buffer.pointer[1] << 8); | |
96 | *result |= (obj->buffer.pointer[2] << 16); | |
97 | *result |= (obj->buffer.pointer[3] << 24); | |
98 | } | |
b072e53b | 99 | ACPI_FREE(obj); |
f19467c5 DA |
100 | } |
101 | ||
f19467c5 DA |
102 | return 0; |
103 | } | |
104 | ||
e284175a JL |
105 | /* |
106 | * On some platforms, _DSM(nouveau_op_dsm_muid, func0) has special | |
107 | * requirements on the fourth parameter, so a private implementation | |
108 | * instead of using acpi_check_dsm(). | |
109 | */ | |
a12e78dd | 110 | static int nouveau_dsm_get_optimus_functions(acpi_handle handle) |
e284175a JL |
111 | { |
112 | int result; | |
113 | ||
114 | /* | |
115 | * Function 0 returns a Buffer containing available functions. | |
116 | * The args parameter is ignored for function 0, so just put 0 in it | |
117 | */ | |
118 | if (nouveau_optimus_dsm(handle, 0, 0, &result)) | |
119 | return 0; | |
120 | ||
121 | /* | |
122 | * ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. | |
123 | * If the n-th bit is enabled, function n is supported | |
124 | */ | |
a12e78dd PW |
125 | if (result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS)) |
126 | return result; | |
127 | return 0; | |
e284175a JL |
128 | } |
129 | ||
b072e53b | 130 | static int nouveau_dsm(acpi_handle handle, int func, int arg) |
6a9ee8af | 131 | { |
b072e53b | 132 | int ret = 0; |
6ee73861 | 133 | union acpi_object *obj; |
b072e53b JL |
134 | union acpi_object argv4 = { |
135 | .integer.type = ACPI_TYPE_INTEGER, | |
136 | .integer.value = arg, | |
137 | }; | |
138 | ||
94116f81 | 139 | obj = acpi_evaluate_dsm_typed(handle, &nouveau_dsm_muid, 0x00000102, |
b072e53b JL |
140 | func, &argv4, ACPI_TYPE_INTEGER); |
141 | if (!obj) { | |
142 | acpi_handle_info(handle, "failed to evaluate _DSM\n"); | |
143 | return AE_ERROR; | |
144 | } else { | |
6ee73861 | 145 | if (obj->integer.value == 0x80000002) |
b072e53b JL |
146 | ret = -ENODEV; |
147 | ACPI_FREE(obj); | |
6ee73861 BS |
148 | } |
149 | ||
b072e53b | 150 | return ret; |
9075e85f PL |
151 | } |
152 | ||
6a9ee8af | 153 | static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id) |
6ee73861 | 154 | { |
000703f4 | 155 | mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); |
8116188f | 156 | mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); |
b072e53b | 157 | return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id); |
6a9ee8af DA |
158 | } |
159 | ||
160 | static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state) | |
161 | { | |
162 | int arg; | |
163 | if (state == VGA_SWITCHEROO_ON) | |
164 | arg = NOUVEAU_DSM_POWER_SPEED; | |
165 | else | |
166 | arg = NOUVEAU_DSM_POWER_STAMINA; | |
b072e53b | 167 | nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg); |
6a9ee8af DA |
168 | return 0; |
169 | } | |
170 | ||
171 | static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id) | |
172 | { | |
c839d748 | 173 | if (!nouveau_dsm_priv.dsm_detected) |
d099230c | 174 | return 0; |
6a9ee8af | 175 | if (id == VGA_SWITCHEROO_IGD) |
fc5ea29d | 176 | return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA); |
6a9ee8af | 177 | else |
fc5ea29d | 178 | return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED); |
6a9ee8af | 179 | } |
6ee73861 | 180 | |
6a9ee8af DA |
181 | static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id, |
182 | enum vga_switcheroo_state state) | |
183 | { | |
184 | if (id == VGA_SWITCHEROO_IGD) | |
185 | return 0; | |
186 | ||
d099230c PL |
187 | /* Optimus laptops have the card already disabled in |
188 | * nouveau_switcheroo_set_state */ | |
c839d748 | 189 | if (!nouveau_dsm_priv.dsm_detected) |
d099230c PL |
190 | return 0; |
191 | ||
fc5ea29d | 192 | return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state); |
6a9ee8af DA |
193 | } |
194 | ||
6a9ee8af | 195 | static int nouveau_dsm_get_client_id(struct pci_dev *pdev) |
6ee73861 | 196 | { |
d1fbd923 DA |
197 | /* easy option one - intel vendor ID means Integrated */ |
198 | if (pdev->vendor == PCI_VENDOR_ID_INTEL) | |
6a9ee8af | 199 | return VGA_SWITCHEROO_IGD; |
d1fbd923 DA |
200 | |
201 | /* is this device on Bus 0? - this may need improving */ | |
202 | if (pdev->bus->number == 0) | |
203 | return VGA_SWITCHEROO_IGD; | |
204 | ||
205 | return VGA_SWITCHEROO_DIS; | |
6a9ee8af DA |
206 | } |
207 | ||
5d170139 | 208 | static const struct vga_switcheroo_handler nouveau_dsm_handler = { |
6a9ee8af DA |
209 | .switchto = nouveau_dsm_switchto, |
210 | .power_state = nouveau_dsm_power_state, | |
6a9ee8af DA |
211 | .get_client_id = nouveau_dsm_get_client_id, |
212 | }; | |
6ee73861 | 213 | |
692a17dc PW |
214 | /* |
215 | * Firmware supporting Windows 8 or later do not use _DSM to put the device into | |
216 | * D3cold, they instead rely on disabling power resources on the parent. | |
217 | */ | |
218 | static bool nouveau_pr3_present(struct pci_dev *pdev) | |
219 | { | |
220 | struct pci_dev *parent_pdev = pci_upstream_bridge(pdev); | |
221 | struct acpi_device *parent_adev; | |
222 | ||
223 | if (!parent_pdev) | |
224 | return false; | |
225 | ||
279cf3f2 PW |
226 | if (!parent_pdev->bridge_d3) { |
227 | /* | |
228 | * Parent PCI bridge is currently not power managed. | |
229 | * Since userspace can change these afterwards to be on | |
230 | * the safe side we stick with _DSM and prevent usage of | |
231 | * _PR3 from the bridge. | |
232 | */ | |
233 | pci_d3cold_disable(pdev); | |
234 | return false; | |
235 | } | |
236 | ||
692a17dc PW |
237 | parent_adev = ACPI_COMPANION(&parent_pdev->dev); |
238 | if (!parent_adev) | |
239 | return false; | |
240 | ||
b0a6af8b PW |
241 | return parent_adev->power.flags.power_resources && |
242 | acpi_has_method(parent_adev->handle, "_PR3"); | |
692a17dc PW |
243 | } |
244 | ||
df42194a | 245 | static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out, |
cba97805 | 246 | bool *has_mux, bool *has_opt, |
692a17dc | 247 | bool *has_opt_flags, bool *has_pr3) |
6a9ee8af | 248 | { |
187b5b5d | 249 | acpi_handle dhandle; |
df42194a | 250 | bool supports_mux; |
a12e78dd | 251 | int optimus_funcs; |
6a9ee8af | 252 | |
3a83f992 | 253 | dhandle = ACPI_HANDLE(&pdev->dev); |
6a9ee8af | 254 | if (!dhandle) |
df42194a | 255 | return; |
afeb3e11 | 256 | |
f91ce35e | 257 | if (!acpi_has_method(dhandle, "_DSM")) |
df42194a PW |
258 | return; |
259 | ||
94116f81 | 260 | supports_mux = acpi_check_dsm(dhandle, &nouveau_dsm_muid, 0x00000102, |
df42194a | 261 | 1 << NOUVEAU_DSM_POWER); |
a12e78dd | 262 | optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle); |
f91ce35e | 263 | |
df42194a | 264 | /* Does not look like a Nvidia device. */ |
a12e78dd | 265 | if (!supports_mux && !optimus_funcs) |
df42194a | 266 | return; |
f19467c5 | 267 | |
df42194a PW |
268 | *dhandle_out = dhandle; |
269 | *has_mux = supports_mux; | |
a12e78dd | 270 | *has_opt = !!optimus_funcs; |
cba97805 | 271 | *has_opt_flags = optimus_funcs & (1 << NOUVEAU_DSM_OPTIMUS_FLAGS); |
692a17dc | 272 | *has_pr3 = false; |
f19467c5 | 273 | |
a12e78dd | 274 | if (optimus_funcs) { |
5addcf0a DA |
275 | uint32_t result; |
276 | nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0, | |
277 | &result); | |
278 | dev_info(&pdev->dev, "optimus capabilities: %s, status %s%s\n", | |
279 | (result & OPTIMUS_ENABLED) ? "enabled" : "disabled", | |
280 | (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "", | |
281 | (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : ""); | |
692a17dc PW |
282 | |
283 | *has_pr3 = nouveau_pr3_present(pdev); | |
5addcf0a | 284 | } |
6ee73861 | 285 | } |
6a9ee8af DA |
286 | |
287 | static bool nouveau_dsm_detect(void) | |
288 | { | |
289 | char acpi_method_name[255] = { 0 }; | |
290 | struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name}; | |
291 | struct pci_dev *pdev = NULL; | |
df42194a PW |
292 | acpi_handle dhandle = NULL; |
293 | bool has_mux = false; | |
294 | bool has_optimus = false; | |
cba97805 | 295 | bool has_optimus_flags = false; |
692a17dc | 296 | bool has_power_resources = false; |
6a9ee8af | 297 | int vga_count = 0; |
8116188f | 298 | bool guid_valid; |
f19467c5 | 299 | bool ret = false; |
8116188f | 300 | |
f19467c5 | 301 | /* lookup the MXM GUID */ |
8116188f | 302 | guid_valid = mxm_wmi_supported(); |
8116188f | 303 | |
f19467c5 DA |
304 | if (guid_valid) |
305 | printk("MXM: GUID detected in BIOS\n"); | |
afeb3e11 | 306 | |
f19467c5 | 307 | /* now do DSM detection */ |
6a9ee8af DA |
308 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { |
309 | vga_count++; | |
310 | ||
cba97805 | 311 | nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus, |
692a17dc | 312 | &has_optimus_flags, &has_power_resources); |
6a9ee8af DA |
313 | } |
314 | ||
4c60fac1 EV |
315 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) { |
316 | vga_count++; | |
317 | ||
cba97805 | 318 | nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus, |
692a17dc | 319 | &has_optimus_flags, &has_power_resources); |
4c60fac1 EV |
320 | } |
321 | ||
c839d748 | 322 | /* find the optimus DSM or the old v1 DSM */ |
df42194a PW |
323 | if (has_optimus) { |
324 | nouveau_dsm_priv.dhandle = dhandle; | |
d099230c PL |
325 | acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, |
326 | &buffer); | |
8dfe162a | 327 | pr_info("VGA switcheroo: detected Optimus DSM method %s handle\n", |
d099230c | 328 | acpi_method_name); |
692a17dc PW |
329 | if (has_power_resources) |
330 | pr_info("nouveau: detected PR support, will not use DSM\n"); | |
c839d748 | 331 | nouveau_dsm_priv.optimus_detected = true; |
cba97805 | 332 | nouveau_dsm_priv.optimus_flags_detected = has_optimus_flags; |
692a17dc | 333 | nouveau_dsm_priv.optimus_skip_dsm = has_power_resources; |
f19467c5 | 334 | ret = true; |
df42194a PW |
335 | } else if (vga_count == 2 && has_mux && guid_valid) { |
336 | nouveau_dsm_priv.dhandle = dhandle; | |
d099230c PL |
337 | acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, |
338 | &buffer); | |
8dfe162a | 339 | pr_info("VGA switcheroo: detected DSM switching method %s handle\n", |
d099230c | 340 | acpi_method_name); |
c839d748 | 341 | nouveau_dsm_priv.dsm_detected = true; |
d099230c PL |
342 | ret = true; |
343 | } | |
f19467c5 | 344 | |
c839d748 | 345 | |
f19467c5 | 346 | return ret; |
6a9ee8af DA |
347 | } |
348 | ||
349 | void nouveau_register_dsm_handler(void) | |
350 | { | |
351 | bool r; | |
352 | ||
353 | r = nouveau_dsm_detect(); | |
354 | if (!r) | |
355 | return; | |
356 | ||
156d7d41 | 357 | vga_switcheroo_register_handler(&nouveau_dsm_handler, 0); |
6a9ee8af DA |
358 | } |
359 | ||
d099230c PL |
360 | /* Must be called for Optimus models before the card can be turned off */ |
361 | void nouveau_switcheroo_optimus_dsm(void) | |
362 | { | |
363 | u32 result = 0; | |
692a17dc | 364 | if (!nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.optimus_skip_dsm) |
d099230c PL |
365 | return; |
366 | ||
cba97805 PW |
367 | if (nouveau_dsm_priv.optimus_flags_detected) |
368 | nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FLAGS, | |
369 | 0x3, &result); | |
5addcf0a DA |
370 | |
371 | nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, | |
372 | NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN, &result); | |
373 | ||
d099230c PL |
374 | } |
375 | ||
6a9ee8af DA |
376 | void nouveau_unregister_dsm_handler(void) |
377 | { | |
2f3787aa AH |
378 | if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected) |
379 | vga_switcheroo_unregister_handler(); | |
6a9ee8af | 380 | } |
d0ce7b85 JM |
381 | #else |
382 | void nouveau_register_dsm_handler(void) {} | |
383 | void nouveau_unregister_dsm_handler(void) {} | |
384 | void nouveau_switcheroo_optimus_dsm(void) {} | |
385 | #endif | |
afeb3e11 DA |
386 | |
387 | /* retrieve the ROM in 4k blocks */ | |
388 | static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios, | |
389 | int offset, int len) | |
390 | { | |
391 | acpi_status status; | |
392 | union acpi_object rom_arg_elements[2], *obj; | |
393 | struct acpi_object_list rom_arg; | |
394 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; | |
395 | ||
396 | rom_arg.count = 2; | |
397 | rom_arg.pointer = &rom_arg_elements[0]; | |
398 | ||
399 | rom_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
400 | rom_arg_elements[0].integer.value = offset; | |
401 | ||
402 | rom_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
403 | rom_arg_elements[1].integer.value = len; | |
404 | ||
405 | status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer); | |
406 | if (ACPI_FAILURE(status)) { | |
8dfe162a JP |
407 | pr_info("failed to evaluate ROM got %s\n", |
408 | acpi_format_exception(status)); | |
afeb3e11 DA |
409 | return -ENODEV; |
410 | } | |
411 | obj = (union acpi_object *)buffer.pointer; | |
95432941 | 412 | len = min(len, (int)obj->buffer.length); |
afeb3e11 DA |
413 | memcpy(bios+offset, obj->buffer.pointer, len); |
414 | kfree(buffer.pointer); | |
415 | return len; | |
416 | } | |
417 | ||
26c9e8ef | 418 | bool nouveau_acpi_rom_supported(struct device *dev) |
afeb3e11 DA |
419 | { |
420 | acpi_status status; | |
421 | acpi_handle dhandle, rom_handle; | |
422 | ||
26c9e8ef | 423 | dhandle = ACPI_HANDLE(dev); |
afeb3e11 DA |
424 | if (!dhandle) |
425 | return false; | |
426 | ||
427 | status = acpi_get_handle(dhandle, "_ROM", &rom_handle); | |
428 | if (ACPI_FAILURE(status)) | |
429 | return false; | |
430 | ||
431 | nouveau_dsm_priv.rom_handle = rom_handle; | |
432 | return true; | |
433 | } | |
434 | ||
435 | int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) | |
436 | { | |
437 | return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len); | |
438 | } | |
a6ed76d7 | 439 | |
c0077061 | 440 | void * |
a6ed76d7 BS |
441 | nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) |
442 | { | |
a6ed76d7 BS |
443 | struct acpi_device *acpidev; |
444 | acpi_handle handle; | |
445 | int type, ret; | |
446 | void *edid; | |
447 | ||
448 | switch (connector->connector_type) { | |
449 | case DRM_MODE_CONNECTOR_LVDS: | |
450 | case DRM_MODE_CONNECTOR_eDP: | |
451 | type = ACPI_VIDEO_DISPLAY_LCD; | |
452 | break; | |
453 | default: | |
c0077061 | 454 | return NULL; |
a6ed76d7 BS |
455 | } |
456 | ||
3a83f992 | 457 | handle = ACPI_HANDLE(&dev->pdev->dev); |
a6ed76d7 | 458 | if (!handle) |
c0077061 | 459 | return NULL; |
a6ed76d7 BS |
460 | |
461 | ret = acpi_bus_get_device(handle, &acpidev); | |
462 | if (ret) | |
c0077061 | 463 | return NULL; |
a6ed76d7 BS |
464 | |
465 | ret = acpi_video_get_edid(acpidev, type, -1, &edid); | |
466 | if (ret < 0) | |
c0077061 | 467 | return NULL; |
a6ed76d7 | 468 | |
c0077061 | 469 | return kmemdup(edid, EDID_LENGTH, GFP_KERNEL); |
a6ed76d7 | 470 | } |