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1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/slab.h>
4#include <acpi/acpi_drivers.h>
5#include <acpi/acpi_bus.h>
6#include <acpi/video.h>
7#include <acpi/acpi.h>
8#include <linux/mxm-wmi.h>
9
10#include "drmP.h"
11#include "drm.h"
12#include "drm_sarea.h"
13#include "drm_crtc_helper.h"
14#include "nouveau_drv.h"
15#include "nouveau_drm.h"
16#include "nv50_display.h"
17#include "nouveau_connector.h"
18
19#include <linux/vga_switcheroo.h>
20
21#define NOUVEAU_DSM_SUPPORTED 0x00
22#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00
23
24#define NOUVEAU_DSM_ACTIVE 0x01
25#define NOUVEAU_DSM_ACTIVE_QUERY 0x00
26
27#define NOUVEAU_DSM_LED 0x02
28#define NOUVEAU_DSM_LED_STATE 0x00
29#define NOUVEAU_DSM_LED_OFF 0x10
30#define NOUVEAU_DSM_LED_STAMINA 0x11
31#define NOUVEAU_DSM_LED_SPEED 0x12
32
33#define NOUVEAU_DSM_POWER 0x03
34#define NOUVEAU_DSM_POWER_STATE 0x00
35#define NOUVEAU_DSM_POWER_SPEED 0x01
36#define NOUVEAU_DSM_POWER_STAMINA 0x02
37
38static struct nouveau_dsm_priv {
39 bool dsm_detected;
40 bool optimus_detected;
41 acpi_handle dhandle;
42 acpi_handle rom_handle;
43} nouveau_dsm_priv;
44
45#define NOUVEAU_DSM_HAS_MUX 0x1
46#define NOUVEAU_DSM_HAS_OPT 0x2
47
48static const char nouveau_dsm_muid[] = {
49 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
50 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
51};
52
53static const char nouveau_op_dsm_muid[] = {
54 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
55 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
56};
57
58static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
59{
60 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
61 struct acpi_object_list input;
62 union acpi_object params[4];
63 union acpi_object *obj;
64 int err;
65
66 input.count = 4;
67 input.pointer = params;
68 params[0].type = ACPI_TYPE_BUFFER;
69 params[0].buffer.length = sizeof(nouveau_op_dsm_muid);
70 params[0].buffer.pointer = (char *)nouveau_op_dsm_muid;
71 params[1].type = ACPI_TYPE_INTEGER;
72 params[1].integer.value = 0x00000100;
73 params[2].type = ACPI_TYPE_INTEGER;
74 params[2].integer.value = func;
75 params[3].type = ACPI_TYPE_BUFFER;
76 params[3].buffer.length = 0;
77
78 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
79 if (err) {
80 printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
81 return err;
82 }
83
84 obj = (union acpi_object *)output.pointer;
85
86 if (obj->type == ACPI_TYPE_INTEGER)
87 if (obj->integer.value == 0x80000002) {
88 return -ENODEV;
89 }
90
91 if (obj->type == ACPI_TYPE_BUFFER) {
92 if (obj->buffer.length == 4 && result) {
93 *result = 0;
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 }
99 }
100
101 kfree(output.pointer);
102 return 0;
103}
104
105static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
106{
107 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
108 struct acpi_object_list input;
109 union acpi_object params[4];
110 union acpi_object *obj;
111 int err;
112
113 input.count = 4;
114 input.pointer = params;
115 params[0].type = ACPI_TYPE_BUFFER;
116 params[0].buffer.length = sizeof(nouveau_dsm_muid);
117 params[0].buffer.pointer = (char *)nouveau_dsm_muid;
118 params[1].type = ACPI_TYPE_INTEGER;
119 params[1].integer.value = 0x00000102;
120 params[2].type = ACPI_TYPE_INTEGER;
121 params[2].integer.value = func;
122 params[3].type = ACPI_TYPE_INTEGER;
123 params[3].integer.value = arg;
124
125 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
126 if (err) {
127 printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
128 return err;
129 }
130
131 obj = (union acpi_object *)output.pointer;
132
133 if (obj->type == ACPI_TYPE_INTEGER)
134 if (obj->integer.value == 0x80000002)
135 return -ENODEV;
136
137 if (obj->type == ACPI_TYPE_BUFFER) {
138 if (obj->buffer.length == 4 && result) {
139 *result = 0;
140 *result |= obj->buffer.pointer[0];
141 *result |= (obj->buffer.pointer[1] << 8);
142 *result |= (obj->buffer.pointer[2] << 16);
143 *result |= (obj->buffer.pointer[3] << 24);
144 }
145 }
146
147 kfree(output.pointer);
148 return 0;
149}
150
151static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
152{
153 mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
154 mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
155 return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
156}
157
158static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
159{
160 int arg;
161 if (state == VGA_SWITCHEROO_ON)
162 arg = NOUVEAU_DSM_POWER_SPEED;
163 else
164 arg = NOUVEAU_DSM_POWER_STAMINA;
165 nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL);
166 return 0;
167}
168
169static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
170{
171 if (id == VGA_SWITCHEROO_IGD)
172 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
173 else
174 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED);
175}
176
177static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
178 enum vga_switcheroo_state state)
179{
180 if (id == VGA_SWITCHEROO_IGD)
181 return 0;
182
183 return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
184}
185
186static int nouveau_dsm_init(void)
187{
188 return 0;
189}
190
191static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
192{
193 /* easy option one - intel vendor ID means Integrated */
194 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
195 return VGA_SWITCHEROO_IGD;
196
197 /* is this device on Bus 0? - this may need improving */
198 if (pdev->bus->number == 0)
199 return VGA_SWITCHEROO_IGD;
200
201 return VGA_SWITCHEROO_DIS;
202}
203
204static struct vga_switcheroo_handler nouveau_dsm_handler = {
205 .switchto = nouveau_dsm_switchto,
206 .power_state = nouveau_dsm_power_state,
207 .init = nouveau_dsm_init,
208 .get_client_id = nouveau_dsm_get_client_id,
209};
210
211static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
212{
213 acpi_handle dhandle, nvidia_handle;
214 acpi_status status;
215 int ret, retval = 0;
216 uint32_t result;
217
218 dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
219 if (!dhandle)
220 return false;
221
222 status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
223 if (ACPI_FAILURE(status)) {
224 return false;
225 }
226
227 ret = nouveau_dsm(dhandle, NOUVEAU_DSM_SUPPORTED,
228 NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
229 if (ret == 0)
230 retval |= NOUVEAU_DSM_HAS_MUX;
231
232 ret = nouveau_optimus_dsm(dhandle, 0, 0, &result);
233 if (ret == 0)
234 retval |= NOUVEAU_DSM_HAS_OPT;
235
236 if (retval)
237 nouveau_dsm_priv.dhandle = dhandle;
238
239 return retval;
240}
241
242static bool nouveau_dsm_detect(void)
243{
244 char acpi_method_name[255] = { 0 };
245 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
246 struct pci_dev *pdev = NULL;
247 int has_dsm = 0;
248 int has_optimus;
249 int vga_count = 0;
250 bool guid_valid;
251 int retval;
252 bool ret = false;
253
254 /* lookup the MXM GUID */
255 guid_valid = mxm_wmi_supported();
256
257 if (guid_valid)
258 printk("MXM: GUID detected in BIOS\n");
259
260 /* now do DSM detection */
261 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
262 vga_count++;
263
264 retval = nouveau_dsm_pci_probe(pdev);
265 if (retval & NOUVEAU_DSM_HAS_MUX)
266 has_dsm |= 1;
267 if (retval & NOUVEAU_DSM_HAS_OPT)
268 has_optimus = 1;
269 }
270
271 if (vga_count == 2 && has_dsm && guid_valid) {
272 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, &buffer);
273 printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
274 acpi_method_name);
275 nouveau_dsm_priv.dsm_detected = true;
276 ret = true;
277 }
278
279 if (has_optimus == 1)
280 nouveau_dsm_priv.optimus_detected = true;
281
282 return ret;
283}
284
285void nouveau_register_dsm_handler(void)
286{
287 bool r;
288
289 r = nouveau_dsm_detect();
290 if (!r)
291 return;
292
293 vga_switcheroo_register_handler(&nouveau_dsm_handler);
294}
295
296void nouveau_unregister_dsm_handler(void)
297{
298 vga_switcheroo_unregister_handler();
299}
300
301/* retrieve the ROM in 4k blocks */
302static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
303 int offset, int len)
304{
305 acpi_status status;
306 union acpi_object rom_arg_elements[2], *obj;
307 struct acpi_object_list rom_arg;
308 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
309
310 rom_arg.count = 2;
311 rom_arg.pointer = &rom_arg_elements[0];
312
313 rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
314 rom_arg_elements[0].integer.value = offset;
315
316 rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
317 rom_arg_elements[1].integer.value = len;
318
319 status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
320 if (ACPI_FAILURE(status)) {
321 printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status));
322 return -ENODEV;
323 }
324 obj = (union acpi_object *)buffer.pointer;
325 memcpy(bios+offset, obj->buffer.pointer, len);
326 kfree(buffer.pointer);
327 return len;
328}
329
330bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
331{
332 acpi_status status;
333 acpi_handle dhandle, rom_handle;
334
335 if (!nouveau_dsm_priv.dsm_detected && !nouveau_dsm_priv.optimus_detected)
336 return false;
337
338 dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
339 if (!dhandle)
340 return false;
341
342 status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
343 if (ACPI_FAILURE(status))
344 return false;
345
346 nouveau_dsm_priv.rom_handle = rom_handle;
347 return true;
348}
349
350int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
351{
352 return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
353}
354
355int
356nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
357{
358 struct nouveau_connector *nv_connector = nouveau_connector(connector);
359 struct acpi_device *acpidev;
360 acpi_handle handle;
361 int type, ret;
362 void *edid;
363
364 switch (connector->connector_type) {
365 case DRM_MODE_CONNECTOR_LVDS:
366 case DRM_MODE_CONNECTOR_eDP:
367 type = ACPI_VIDEO_DISPLAY_LCD;
368 break;
369 default:
370 return -EINVAL;
371 }
372
373 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
374 if (!handle)
375 return -ENODEV;
376
377 ret = acpi_bus_get_device(handle, &acpidev);
378 if (ret)
379 return -ENODEV;
380
381 ret = acpi_video_get_edid(acpidev, type, -1, &edid);
382 if (ret < 0)
383 return ret;
384
385 nv_connector->edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
386 return 0;
387}
1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/slab.h>
4#include <linux/mxm-wmi.h>
5#include <linux/vga_switcheroo.h>
6#include <drm/drm_edid.h>
7#include <acpi/video.h>
8
9#include "nouveau_drv.h"
10#include "nouveau_acpi.h"
11
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
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 */
44
45static struct nouveau_dsm_priv {
46 bool dsm_detected;
47 bool optimus_detected;
48 bool optimus_flags_detected;
49 bool optimus_skip_dsm;
50 acpi_handle dhandle;
51 acpi_handle rom_handle;
52} nouveau_dsm_priv;
53
54bool nouveau_is_optimus(void) {
55 return nouveau_dsm_priv.optimus_detected;
56}
57
58bool nouveau_is_v1_dsm(void) {
59 return nouveau_dsm_priv.dsm_detected;
60}
61
62#ifdef CONFIG_VGA_SWITCHEROO
63static const char nouveau_dsm_muid[] = {
64 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
65 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
66};
67
68static const char nouveau_op_dsm_muid[] = {
69 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
70 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
71};
72
73static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
74{
75 int i;
76 union acpi_object *obj;
77 char args_buff[4];
78 union acpi_object argv4 = {
79 .buffer.type = ACPI_TYPE_BUFFER,
80 .buffer.length = 4,
81 .buffer.pointer = args_buff
82 };
83
84 /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */
85 for (i = 0; i < 4; i++)
86 args_buff[i] = (arg >> i * 8) & 0xFF;
87
88 *result = 0;
89 obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100,
90 func, &argv4, ACPI_TYPE_BUFFER);
91 if (!obj) {
92 acpi_handle_info(handle, "failed to evaluate _DSM\n");
93 return AE_ERROR;
94 } else {
95 if (obj->buffer.length == 4) {
96 *result |= obj->buffer.pointer[0];
97 *result |= (obj->buffer.pointer[1] << 8);
98 *result |= (obj->buffer.pointer[2] << 16);
99 *result |= (obj->buffer.pointer[3] << 24);
100 }
101 ACPI_FREE(obj);
102 }
103
104 return 0;
105}
106
107/*
108 * On some platforms, _DSM(nouveau_op_dsm_muid, func0) has special
109 * requirements on the fourth parameter, so a private implementation
110 * instead of using acpi_check_dsm().
111 */
112static int nouveau_dsm_get_optimus_functions(acpi_handle handle)
113{
114 int result;
115
116 /*
117 * Function 0 returns a Buffer containing available functions.
118 * The args parameter is ignored for function 0, so just put 0 in it
119 */
120 if (nouveau_optimus_dsm(handle, 0, 0, &result))
121 return 0;
122
123 /*
124 * ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported.
125 * If the n-th bit is enabled, function n is supported
126 */
127 if (result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS))
128 return result;
129 return 0;
130}
131
132static int nouveau_dsm(acpi_handle handle, int func, int arg)
133{
134 int ret = 0;
135 union acpi_object *obj;
136 union acpi_object argv4 = {
137 .integer.type = ACPI_TYPE_INTEGER,
138 .integer.value = arg,
139 };
140
141 obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102,
142 func, &argv4, ACPI_TYPE_INTEGER);
143 if (!obj) {
144 acpi_handle_info(handle, "failed to evaluate _DSM\n");
145 return AE_ERROR;
146 } else {
147 if (obj->integer.value == 0x80000002)
148 ret = -ENODEV;
149 ACPI_FREE(obj);
150 }
151
152 return ret;
153}
154
155static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
156{
157 mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
158 mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
159 return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id);
160}
161
162static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
163{
164 int arg;
165 if (state == VGA_SWITCHEROO_ON)
166 arg = NOUVEAU_DSM_POWER_SPEED;
167 else
168 arg = NOUVEAU_DSM_POWER_STAMINA;
169 nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg);
170 return 0;
171}
172
173static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
174{
175 if (!nouveau_dsm_priv.dsm_detected)
176 return 0;
177 if (id == VGA_SWITCHEROO_IGD)
178 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
179 else
180 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED);
181}
182
183static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
184 enum vga_switcheroo_state state)
185{
186 if (id == VGA_SWITCHEROO_IGD)
187 return 0;
188
189 /* Optimus laptops have the card already disabled in
190 * nouveau_switcheroo_set_state */
191 if (!nouveau_dsm_priv.dsm_detected)
192 return 0;
193
194 return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
195}
196
197static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
198{
199 /* easy option one - intel vendor ID means Integrated */
200 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
201 return VGA_SWITCHEROO_IGD;
202
203 /* is this device on Bus 0? - this may need improving */
204 if (pdev->bus->number == 0)
205 return VGA_SWITCHEROO_IGD;
206
207 return VGA_SWITCHEROO_DIS;
208}
209
210static const struct vga_switcheroo_handler nouveau_dsm_handler = {
211 .switchto = nouveau_dsm_switchto,
212 .power_state = nouveau_dsm_power_state,
213 .get_client_id = nouveau_dsm_get_client_id,
214};
215
216/*
217 * Firmware supporting Windows 8 or later do not use _DSM to put the device into
218 * D3cold, they instead rely on disabling power resources on the parent.
219 */
220static bool nouveau_pr3_present(struct pci_dev *pdev)
221{
222 struct pci_dev *parent_pdev = pci_upstream_bridge(pdev);
223 struct acpi_device *parent_adev;
224
225 if (!parent_pdev)
226 return false;
227
228 if (!parent_pdev->bridge_d3) {
229 /*
230 * Parent PCI bridge is currently not power managed.
231 * Since userspace can change these afterwards to be on
232 * the safe side we stick with _DSM and prevent usage of
233 * _PR3 from the bridge.
234 */
235 pci_d3cold_disable(pdev);
236 return false;
237 }
238
239 parent_adev = ACPI_COMPANION(&parent_pdev->dev);
240 if (!parent_adev)
241 return false;
242
243 return parent_adev->power.flags.power_resources &&
244 acpi_has_method(parent_adev->handle, "_PR3");
245}
246
247static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out,
248 bool *has_mux, bool *has_opt,
249 bool *has_opt_flags, bool *has_pr3)
250{
251 acpi_handle dhandle;
252 bool supports_mux;
253 int optimus_funcs;
254
255 dhandle = ACPI_HANDLE(&pdev->dev);
256 if (!dhandle)
257 return;
258
259 if (!acpi_has_method(dhandle, "_DSM"))
260 return;
261
262 supports_mux = acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102,
263 1 << NOUVEAU_DSM_POWER);
264 optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle);
265
266 /* Does not look like a Nvidia device. */
267 if (!supports_mux && !optimus_funcs)
268 return;
269
270 *dhandle_out = dhandle;
271 *has_mux = supports_mux;
272 *has_opt = !!optimus_funcs;
273 *has_opt_flags = optimus_funcs & (1 << NOUVEAU_DSM_OPTIMUS_FLAGS);
274 *has_pr3 = false;
275
276 if (optimus_funcs) {
277 uint32_t result;
278 nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0,
279 &result);
280 dev_info(&pdev->dev, "optimus capabilities: %s, status %s%s\n",
281 (result & OPTIMUS_ENABLED) ? "enabled" : "disabled",
282 (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "",
283 (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : "");
284
285 *has_pr3 = nouveau_pr3_present(pdev);
286 }
287}
288
289static bool nouveau_dsm_detect(void)
290{
291 char acpi_method_name[255] = { 0 };
292 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
293 struct pci_dev *pdev = NULL;
294 acpi_handle dhandle = NULL;
295 bool has_mux = false;
296 bool has_optimus = false;
297 bool has_optimus_flags = false;
298 bool has_power_resources = false;
299 int vga_count = 0;
300 bool guid_valid;
301 bool ret = false;
302
303 /* lookup the MXM GUID */
304 guid_valid = mxm_wmi_supported();
305
306 if (guid_valid)
307 printk("MXM: GUID detected in BIOS\n");
308
309 /* now do DSM detection */
310 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
311 vga_count++;
312
313 nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
314 &has_optimus_flags, &has_power_resources);
315 }
316
317 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) {
318 vga_count++;
319
320 nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
321 &has_optimus_flags, &has_power_resources);
322 }
323
324 /* find the optimus DSM or the old v1 DSM */
325 if (has_optimus) {
326 nouveau_dsm_priv.dhandle = dhandle;
327 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
328 &buffer);
329 printk(KERN_INFO "VGA switcheroo: detected Optimus DSM method %s handle\n",
330 acpi_method_name);
331 if (has_power_resources)
332 pr_info("nouveau: detected PR support, will not use DSM\n");
333 nouveau_dsm_priv.optimus_detected = true;
334 nouveau_dsm_priv.optimus_flags_detected = has_optimus_flags;
335 nouveau_dsm_priv.optimus_skip_dsm = has_power_resources;
336 ret = true;
337 } else if (vga_count == 2 && has_mux && guid_valid) {
338 nouveau_dsm_priv.dhandle = dhandle;
339 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
340 &buffer);
341 printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
342 acpi_method_name);
343 nouveau_dsm_priv.dsm_detected = true;
344 ret = true;
345 }
346
347
348 return ret;
349}
350
351void nouveau_register_dsm_handler(void)
352{
353 bool r;
354
355 r = nouveau_dsm_detect();
356 if (!r)
357 return;
358
359 vga_switcheroo_register_handler(&nouveau_dsm_handler, 0);
360}
361
362/* Must be called for Optimus models before the card can be turned off */
363void nouveau_switcheroo_optimus_dsm(void)
364{
365 u32 result = 0;
366 if (!nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.optimus_skip_dsm)
367 return;
368
369 if (nouveau_dsm_priv.optimus_flags_detected)
370 nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FLAGS,
371 0x3, &result);
372
373 nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_CAPS,
374 NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN, &result);
375
376}
377
378void nouveau_unregister_dsm_handler(void)
379{
380 if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected)
381 vga_switcheroo_unregister_handler();
382}
383#else
384void nouveau_register_dsm_handler(void) {}
385void nouveau_unregister_dsm_handler(void) {}
386void nouveau_switcheroo_optimus_dsm(void) {}
387#endif
388
389/* retrieve the ROM in 4k blocks */
390static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
391 int offset, int len)
392{
393 acpi_status status;
394 union acpi_object rom_arg_elements[2], *obj;
395 struct acpi_object_list rom_arg;
396 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
397
398 rom_arg.count = 2;
399 rom_arg.pointer = &rom_arg_elements[0];
400
401 rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
402 rom_arg_elements[0].integer.value = offset;
403
404 rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
405 rom_arg_elements[1].integer.value = len;
406
407 status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
408 if (ACPI_FAILURE(status)) {
409 printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status));
410 return -ENODEV;
411 }
412 obj = (union acpi_object *)buffer.pointer;
413 len = min(len, (int)obj->buffer.length);
414 memcpy(bios+offset, obj->buffer.pointer, len);
415 kfree(buffer.pointer);
416 return len;
417}
418
419bool nouveau_acpi_rom_supported(struct device *dev)
420{
421 acpi_status status;
422 acpi_handle dhandle, rom_handle;
423
424 dhandle = ACPI_HANDLE(dev);
425 if (!dhandle)
426 return false;
427
428 status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
429 if (ACPI_FAILURE(status))
430 return false;
431
432 nouveau_dsm_priv.rom_handle = rom_handle;
433 return true;
434}
435
436int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
437{
438 return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
439}
440
441void *
442nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
443{
444 struct acpi_device *acpidev;
445 acpi_handle handle;
446 int type, ret;
447 void *edid;
448
449 switch (connector->connector_type) {
450 case DRM_MODE_CONNECTOR_LVDS:
451 case DRM_MODE_CONNECTOR_eDP:
452 type = ACPI_VIDEO_DISPLAY_LCD;
453 break;
454 default:
455 return NULL;
456 }
457
458 handle = ACPI_HANDLE(&dev->pdev->dev);
459 if (!handle)
460 return NULL;
461
462 ret = acpi_bus_get_device(handle, &acpidev);
463 if (ret)
464 return NULL;
465
466 ret = acpi_video_get_edid(acpidev, type, -1, &edid);
467 if (ret < 0)
468 return NULL;
469
470 return kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
471}