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; |
6a9ee8af | 48 | acpi_handle dhandle; |
afeb3e11 | 49 | acpi_handle rom_handle; |
6a9ee8af DA |
50 | } nouveau_dsm_priv; |
51 | ||
c839d748 DA |
52 | bool nouveau_is_optimus(void) { |
53 | return nouveau_dsm_priv.optimus_detected; | |
54 | } | |
55 | ||
56 | bool nouveau_is_v1_dsm(void) { | |
57 | return nouveau_dsm_priv.dsm_detected; | |
58 | } | |
59 | ||
f19467c5 DA |
60 | #define NOUVEAU_DSM_HAS_MUX 0x1 |
61 | #define NOUVEAU_DSM_HAS_OPT 0x2 | |
62 | ||
d0ce7b85 | 63 | #ifdef CONFIG_VGA_SWITCHEROO |
6a9ee8af DA |
64 | static const char nouveau_dsm_muid[] = { |
65 | 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D, | |
66 | 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4, | |
67 | }; | |
6ee73861 | 68 | |
f19467c5 DA |
69 | static const char nouveau_op_dsm_muid[] = { |
70 | 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47, | |
71 | 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0, | |
72 | }; | |
73 | ||
74 | static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result) | |
75 | { | |
b072e53b | 76 | int i; |
f19467c5 | 77 | union acpi_object *obj; |
d099230c | 78 | char args_buff[4]; |
b072e53b JL |
79 | union acpi_object argv4 = { |
80 | .buffer.type = ACPI_TYPE_BUFFER, | |
81 | .buffer.length = 4, | |
82 | .buffer.pointer = args_buff | |
83 | }; | |
f19467c5 | 84 | |
d099230c PL |
85 | /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */ |
86 | for (i = 0; i < 4; i++) | |
87 | args_buff[i] = (arg >> i * 8) & 0xFF; | |
f19467c5 | 88 | |
b072e53b JL |
89 | *result = 0; |
90 | obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100, | |
91 | func, &argv4, ACPI_TYPE_BUFFER); | |
92 | if (!obj) { | |
93 | acpi_handle_info(handle, "failed to evaluate _DSM\n"); | |
94 | return AE_ERROR; | |
95 | } else { | |
96 | if (obj->buffer.length == 4) { | |
f19467c5 DA |
97 | *result |= obj->buffer.pointer[0]; |
98 | *result |= (obj->buffer.pointer[1] << 8); | |
99 | *result |= (obj->buffer.pointer[2] << 16); | |
100 | *result |= (obj->buffer.pointer[3] << 24); | |
101 | } | |
b072e53b | 102 | ACPI_FREE(obj); |
f19467c5 DA |
103 | } |
104 | ||
f19467c5 DA |
105 | return 0; |
106 | } | |
107 | ||
e284175a JL |
108 | /* |
109 | * On some platforms, _DSM(nouveau_op_dsm_muid, func0) has special | |
110 | * requirements on the fourth parameter, so a private implementation | |
111 | * instead of using acpi_check_dsm(). | |
112 | */ | |
113 | static int nouveau_check_optimus_dsm(acpi_handle handle) | |
114 | { | |
115 | int result; | |
116 | ||
117 | /* | |
118 | * Function 0 returns a Buffer containing available functions. | |
119 | * The args parameter is ignored for function 0, so just put 0 in it | |
120 | */ | |
121 | if (nouveau_optimus_dsm(handle, 0, 0, &result)) | |
122 | return 0; | |
123 | ||
124 | /* | |
125 | * ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. | |
126 | * If the n-th bit is enabled, function n is supported | |
127 | */ | |
128 | return result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS); | |
129 | } | |
130 | ||
b072e53b | 131 | static int nouveau_dsm(acpi_handle handle, int func, int arg) |
6a9ee8af | 132 | { |
b072e53b | 133 | int ret = 0; |
6ee73861 | 134 | union acpi_object *obj; |
b072e53b JL |
135 | union acpi_object argv4 = { |
136 | .integer.type = ACPI_TYPE_INTEGER, | |
137 | .integer.value = arg, | |
138 | }; | |
139 | ||
140 | obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102, | |
141 | func, &argv4, ACPI_TYPE_INTEGER); | |
142 | if (!obj) { | |
143 | acpi_handle_info(handle, "failed to evaluate _DSM\n"); | |
144 | return AE_ERROR; | |
145 | } else { | |
6ee73861 | 146 | if (obj->integer.value == 0x80000002) |
b072e53b JL |
147 | ret = -ENODEV; |
148 | ACPI_FREE(obj); | |
6ee73861 BS |
149 | } |
150 | ||
b072e53b | 151 | return ret; |
9075e85f PL |
152 | } |
153 | ||
6a9ee8af | 154 | static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id) |
6ee73861 | 155 | { |
000703f4 | 156 | mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); |
8116188f | 157 | mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); |
b072e53b | 158 | return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id); |
6a9ee8af DA |
159 | } |
160 | ||
161 | static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state) | |
162 | { | |
163 | int arg; | |
164 | if (state == VGA_SWITCHEROO_ON) | |
165 | arg = NOUVEAU_DSM_POWER_SPEED; | |
166 | else | |
167 | arg = NOUVEAU_DSM_POWER_STAMINA; | |
b072e53b | 168 | nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg); |
6a9ee8af DA |
169 | return 0; |
170 | } | |
171 | ||
172 | static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id) | |
173 | { | |
c839d748 | 174 | if (!nouveau_dsm_priv.dsm_detected) |
d099230c | 175 | return 0; |
6a9ee8af | 176 | if (id == VGA_SWITCHEROO_IGD) |
fc5ea29d | 177 | return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA); |
6a9ee8af | 178 | else |
fc5ea29d | 179 | return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED); |
6a9ee8af | 180 | } |
6ee73861 | 181 | |
6a9ee8af DA |
182 | static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id, |
183 | enum vga_switcheroo_state state) | |
184 | { | |
185 | if (id == VGA_SWITCHEROO_IGD) | |
186 | return 0; | |
187 | ||
d099230c PL |
188 | /* Optimus laptops have the card already disabled in |
189 | * nouveau_switcheroo_set_state */ | |
c839d748 | 190 | if (!nouveau_dsm_priv.dsm_detected) |
d099230c PL |
191 | return 0; |
192 | ||
fc5ea29d | 193 | return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state); |
6a9ee8af DA |
194 | } |
195 | ||
6a9ee8af | 196 | static int nouveau_dsm_get_client_id(struct pci_dev *pdev) |
6ee73861 | 197 | { |
d1fbd923 DA |
198 | /* easy option one - intel vendor ID means Integrated */ |
199 | if (pdev->vendor == PCI_VENDOR_ID_INTEL) | |
6a9ee8af | 200 | return VGA_SWITCHEROO_IGD; |
d1fbd923 DA |
201 | |
202 | /* is this device on Bus 0? - this may need improving */ | |
203 | if (pdev->bus->number == 0) | |
204 | return VGA_SWITCHEROO_IGD; | |
205 | ||
206 | return VGA_SWITCHEROO_DIS; | |
6a9ee8af DA |
207 | } |
208 | ||
5d170139 | 209 | static const struct vga_switcheroo_handler nouveau_dsm_handler = { |
6a9ee8af DA |
210 | .switchto = nouveau_dsm_switchto, |
211 | .power_state = nouveau_dsm_power_state, | |
6a9ee8af DA |
212 | .get_client_id = nouveau_dsm_get_client_id, |
213 | }; | |
6ee73861 | 214 | |
f19467c5 | 215 | static int nouveau_dsm_pci_probe(struct pci_dev *pdev) |
6a9ee8af | 216 | { |
187b5b5d | 217 | acpi_handle dhandle; |
9075e85f | 218 | int retval = 0; |
6a9ee8af | 219 | |
3a83f992 | 220 | dhandle = ACPI_HANDLE(&pdev->dev); |
6a9ee8af DA |
221 | if (!dhandle) |
222 | return false; | |
afeb3e11 | 223 | |
f91ce35e | 224 | if (!acpi_has_method(dhandle, "_DSM")) |
6ee73861 | 225 | return false; |
f91ce35e | 226 | |
b072e53b JL |
227 | if (acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102, |
228 | 1 << NOUVEAU_DSM_POWER)) | |
f19467c5 DA |
229 | retval |= NOUVEAU_DSM_HAS_MUX; |
230 | ||
e284175a | 231 | if (nouveau_check_optimus_dsm(dhandle)) |
f19467c5 DA |
232 | retval |= NOUVEAU_DSM_HAS_OPT; |
233 | ||
5addcf0a DA |
234 | if (retval & NOUVEAU_DSM_HAS_OPT) { |
235 | uint32_t result; | |
236 | nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0, | |
237 | &result); | |
238 | dev_info(&pdev->dev, "optimus capabilities: %s, status %s%s\n", | |
239 | (result & OPTIMUS_ENABLED) ? "enabled" : "disabled", | |
240 | (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "", | |
241 | (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : ""); | |
242 | } | |
f19467c5 DA |
243 | if (retval) |
244 | nouveau_dsm_priv.dhandle = dhandle; | |
6ee73861 | 245 | |
f19467c5 | 246 | return retval; |
6ee73861 | 247 | } |
6a9ee8af DA |
248 | |
249 | static bool nouveau_dsm_detect(void) | |
250 | { | |
251 | char acpi_method_name[255] = { 0 }; | |
252 | struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name}; | |
253 | struct pci_dev *pdev = NULL; | |
254 | int has_dsm = 0; | |
addde4ec | 255 | int has_optimus = 0; |
6a9ee8af | 256 | int vga_count = 0; |
8116188f | 257 | bool guid_valid; |
f19467c5 DA |
258 | int retval; |
259 | bool ret = false; | |
8116188f | 260 | |
f19467c5 | 261 | /* lookup the MXM GUID */ |
8116188f | 262 | guid_valid = mxm_wmi_supported(); |
8116188f | 263 | |
f19467c5 DA |
264 | if (guid_valid) |
265 | printk("MXM: GUID detected in BIOS\n"); | |
afeb3e11 | 266 | |
f19467c5 | 267 | /* now do DSM detection */ |
6a9ee8af DA |
268 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { |
269 | vga_count++; | |
270 | ||
f19467c5 | 271 | retval = nouveau_dsm_pci_probe(pdev); |
f19467c5 DA |
272 | if (retval & NOUVEAU_DSM_HAS_MUX) |
273 | has_dsm |= 1; | |
274 | if (retval & NOUVEAU_DSM_HAS_OPT) | |
275 | has_optimus = 1; | |
6a9ee8af DA |
276 | } |
277 | ||
4c60fac1 EV |
278 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) { |
279 | vga_count++; | |
280 | ||
281 | retval = nouveau_dsm_pci_probe(pdev); | |
282 | if (retval & NOUVEAU_DSM_HAS_MUX) | |
283 | has_dsm |= 1; | |
284 | if (retval & NOUVEAU_DSM_HAS_OPT) | |
285 | has_optimus = 1; | |
286 | } | |
287 | ||
c839d748 DA |
288 | /* find the optimus DSM or the old v1 DSM */ |
289 | if (has_optimus == 1) { | |
d099230c PL |
290 | acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, |
291 | &buffer); | |
c839d748 | 292 | printk(KERN_INFO "VGA switcheroo: detected Optimus DSM method %s handle\n", |
d099230c | 293 | acpi_method_name); |
c839d748 | 294 | nouveau_dsm_priv.optimus_detected = true; |
f19467c5 | 295 | ret = true; |
c839d748 | 296 | } else if (vga_count == 2 && has_dsm && guid_valid) { |
d099230c PL |
297 | acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, |
298 | &buffer); | |
c839d748 | 299 | printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n", |
d099230c | 300 | acpi_method_name); |
c839d748 | 301 | nouveau_dsm_priv.dsm_detected = true; |
d099230c PL |
302 | ret = true; |
303 | } | |
f19467c5 | 304 | |
c839d748 | 305 | |
f19467c5 | 306 | return ret; |
6a9ee8af DA |
307 | } |
308 | ||
309 | void nouveau_register_dsm_handler(void) | |
310 | { | |
311 | bool r; | |
312 | ||
313 | r = nouveau_dsm_detect(); | |
314 | if (!r) | |
315 | return; | |
316 | ||
156d7d41 | 317 | vga_switcheroo_register_handler(&nouveau_dsm_handler, 0); |
6a9ee8af DA |
318 | } |
319 | ||
d099230c PL |
320 | /* Must be called for Optimus models before the card can be turned off */ |
321 | void nouveau_switcheroo_optimus_dsm(void) | |
322 | { | |
323 | u32 result = 0; | |
324 | if (!nouveau_dsm_priv.optimus_detected) | |
325 | return; | |
326 | ||
5addcf0a DA |
327 | nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FLAGS, |
328 | 0x3, &result); | |
329 | ||
330 | nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, | |
331 | NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN, &result); | |
332 | ||
d099230c PL |
333 | } |
334 | ||
6a9ee8af DA |
335 | void nouveau_unregister_dsm_handler(void) |
336 | { | |
2f3787aa AH |
337 | if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected) |
338 | vga_switcheroo_unregister_handler(); | |
6a9ee8af | 339 | } |
d0ce7b85 JM |
340 | #else |
341 | void nouveau_register_dsm_handler(void) {} | |
342 | void nouveau_unregister_dsm_handler(void) {} | |
343 | void nouveau_switcheroo_optimus_dsm(void) {} | |
344 | #endif | |
afeb3e11 DA |
345 | |
346 | /* retrieve the ROM in 4k blocks */ | |
347 | static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios, | |
348 | int offset, int len) | |
349 | { | |
350 | acpi_status status; | |
351 | union acpi_object rom_arg_elements[2], *obj; | |
352 | struct acpi_object_list rom_arg; | |
353 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; | |
354 | ||
355 | rom_arg.count = 2; | |
356 | rom_arg.pointer = &rom_arg_elements[0]; | |
357 | ||
358 | rom_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
359 | rom_arg_elements[0].integer.value = offset; | |
360 | ||
361 | rom_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
362 | rom_arg_elements[1].integer.value = len; | |
363 | ||
364 | status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer); | |
365 | if (ACPI_FAILURE(status)) { | |
366 | printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status)); | |
367 | return -ENODEV; | |
368 | } | |
369 | obj = (union acpi_object *)buffer.pointer; | |
95432941 | 370 | len = min(len, (int)obj->buffer.length); |
afeb3e11 DA |
371 | memcpy(bios+offset, obj->buffer.pointer, len); |
372 | kfree(buffer.pointer); | |
373 | return len; | |
374 | } | |
375 | ||
26c9e8ef | 376 | bool nouveau_acpi_rom_supported(struct device *dev) |
afeb3e11 DA |
377 | { |
378 | acpi_status status; | |
379 | acpi_handle dhandle, rom_handle; | |
380 | ||
26c9e8ef | 381 | dhandle = ACPI_HANDLE(dev); |
afeb3e11 DA |
382 | if (!dhandle) |
383 | return false; | |
384 | ||
385 | status = acpi_get_handle(dhandle, "_ROM", &rom_handle); | |
386 | if (ACPI_FAILURE(status)) | |
387 | return false; | |
388 | ||
389 | nouveau_dsm_priv.rom_handle = rom_handle; | |
390 | return true; | |
391 | } | |
392 | ||
393 | int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) | |
394 | { | |
395 | return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len); | |
396 | } | |
a6ed76d7 | 397 | |
c0077061 | 398 | void * |
a6ed76d7 BS |
399 | nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) |
400 | { | |
a6ed76d7 BS |
401 | struct acpi_device *acpidev; |
402 | acpi_handle handle; | |
403 | int type, ret; | |
404 | void *edid; | |
405 | ||
406 | switch (connector->connector_type) { | |
407 | case DRM_MODE_CONNECTOR_LVDS: | |
408 | case DRM_MODE_CONNECTOR_eDP: | |
409 | type = ACPI_VIDEO_DISPLAY_LCD; | |
410 | break; | |
411 | default: | |
c0077061 | 412 | return NULL; |
a6ed76d7 BS |
413 | } |
414 | ||
3a83f992 | 415 | handle = ACPI_HANDLE(&dev->pdev->dev); |
a6ed76d7 | 416 | if (!handle) |
c0077061 | 417 | return NULL; |
a6ed76d7 BS |
418 | |
419 | ret = acpi_bus_get_device(handle, &acpidev); | |
420 | if (ret) | |
c0077061 | 421 | return NULL; |
a6ed76d7 BS |
422 | |
423 | ret = acpi_video_get_edid(acpidev, type, -1, &edid); | |
424 | if (ret < 0) | |
c0077061 | 425 | return NULL; |
a6ed76d7 | 426 | |
c0077061 | 427 | return kmemdup(edid, EDID_LENGTH, GFP_KERNEL); |
a6ed76d7 | 428 | } |