blob: fe3a10255c367b4738055769005afd14b3da7265 [file] [log] [blame]
Ilia Mirkinb7019ac2019-06-19 20:13:43 -04001// SPDX-License-Identifier: MIT
Ben Skeggs6ee73862009-12-11 19:24:15 +10002#include <linux/pci.h>
3#include <linux/acpi.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09004#include <linux/slab.h>
Dave Airlie81161882010-12-06 12:57:45 +10005#include <linux/mxm-wmi.h>
Dave Airlie6a9ee8a2010-02-01 15:38:10 +10006#include <linux/vga_switcheroo.h>
Linus Torvalds612a9aa2012-10-03 23:29:23 -07007#include <drm/drm_edid.h>
Lv Zheng8b484632013-12-03 08:49:16 +08008#include <acpi/video.h>
Ben Skeggsc0077062012-07-26 08:51:21 +10009
Ben Skeggs4dc28132016-05-20 09:22:55 +100010#include "nouveau_drv.h"
Ben Skeggsc0077062012-07-26 08:51:21 +100011#include "nouveau_acpi.h"
12
Ben Skeggs6ee73862009-12-11 19:24:15 +100013#define NOUVEAU_DSM_LED 0x02
14#define NOUVEAU_DSM_LED_STATE 0x00
15#define NOUVEAU_DSM_LED_OFF 0x10
16#define NOUVEAU_DSM_LED_STAMINA 0x11
17#define NOUVEAU_DSM_LED_SPEED 0x12
18
19#define NOUVEAU_DSM_POWER 0x03
20#define NOUVEAU_DSM_POWER_STATE 0x00
21#define NOUVEAU_DSM_POWER_SPEED 0x01
22#define NOUVEAU_DSM_POWER_STAMINA 0x02
23
Dave Airlie5addcf02012-09-10 14:20:51 +100024#define NOUVEAU_DSM_OPTIMUS_CAPS 0x1A
25#define NOUVEAU_DSM_OPTIMUS_FLAGS 0x1B
26
27#define NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 (3 << 24)
28#define NOUVEAU_DSM_OPTIMUS_NO_POWERDOWN_PS3 (2 << 24)
29#define NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED (1)
30
31#define NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN (NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 | NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED)
32
33/* result of the optimus caps function */
34#define OPTIMUS_ENABLED (1 << 0)
35#define OPTIMUS_STATUS_MASK (3 << 3)
36#define OPTIMUS_STATUS_OFF (0 << 3)
37#define OPTIMUS_STATUS_ON_ENABLED (1 << 3)
38#define OPTIMUS_STATUS_PWR_STABLE (3 << 3)
39#define OPTIMUS_DISPLAY_HOTPLUG (1 << 6)
40#define OPTIMUS_CAPS_MASK (7 << 24)
41#define OPTIMUS_DYNAMIC_PWR_CAP (1 << 24)
42
43#define OPTIMUS_AUDIO_CAPS_MASK (3 << 27)
44#define OPTIMUS_HDA_CODEC_MASK (2 << 27) /* hda bios control */
Peter Lekensteynd0992302011-12-17 12:54:04 +010045
Dave Airlie6a9ee8a2010-02-01 15:38:10 +100046static struct nouveau_dsm_priv {
47 bool dsm_detected;
Dave Airlief19467c2011-03-22 14:10:27 +100048 bool optimus_detected;
Peter Wucba97802016-07-15 15:12:17 +020049 bool optimus_flags_detected;
Peter Wu692a17d2016-07-15 15:12:18 +020050 bool optimus_skip_dsm;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +100051 acpi_handle dhandle;
Dave Airlieafeb3e12010-04-07 13:55:09 +100052 acpi_handle rom_handle;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +100053} nouveau_dsm_priv;
Ben Skeggs6ee73862009-12-11 19:24:15 +100054
Dave Airliec839d742012-11-02 11:04:27 +100055bool nouveau_is_optimus(void) {
56 return nouveau_dsm_priv.optimus_detected;
57}
58
59bool nouveau_is_v1_dsm(void) {
60 return nouveau_dsm_priv.dsm_detected;
61}
62
Jeff Mahoneyd0ce7b8562014-01-21 14:34:52 -080063#ifdef CONFIG_VGA_SWITCHEROO
Andy Shevchenko94116f82017-06-05 19:40:46 +030064static const guid_t nouveau_dsm_muid =
65 GUID_INIT(0x9D95A0A0, 0x0060, 0x4D48,
66 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +100067
Andy Shevchenko94116f82017-06-05 19:40:46 +030068static const guid_t nouveau_op_dsm_muid =
69 GUID_INIT(0xA486D8F8, 0x0BDA, 0x471B,
70 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0);
Dave Airlief19467c2011-03-22 14:10:27 +100071
72static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
73{
Jiang Liub072e532013-12-19 20:38:22 +080074 int i;
Dave Airlief19467c2011-03-22 14:10:27 +100075 union acpi_object *obj;
Peter Lekensteynd0992302011-12-17 12:54:04 +010076 char args_buff[4];
Jiang Liub072e532013-12-19 20:38:22 +080077 union acpi_object argv4 = {
78 .buffer.type = ACPI_TYPE_BUFFER,
79 .buffer.length = 4,
80 .buffer.pointer = args_buff
81 };
Dave Airlief19467c2011-03-22 14:10:27 +100082
Peter Lekensteynd0992302011-12-17 12:54:04 +010083 /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */
84 for (i = 0; i < 4; i++)
85 args_buff[i] = (arg >> i * 8) & 0xFF;
Dave Airlief19467c2011-03-22 14:10:27 +100086
Jiang Liub072e532013-12-19 20:38:22 +080087 *result = 0;
Andy Shevchenko94116f82017-06-05 19:40:46 +030088 obj = acpi_evaluate_dsm_typed(handle, &nouveau_op_dsm_muid, 0x00000100,
Jiang Liub072e532013-12-19 20:38:22 +080089 func, &argv4, ACPI_TYPE_BUFFER);
90 if (!obj) {
91 acpi_handle_info(handle, "failed to evaluate _DSM\n");
92 return AE_ERROR;
93 } else {
94 if (obj->buffer.length == 4) {
Dave Airlief19467c2011-03-22 14:10:27 +100095 *result |= obj->buffer.pointer[0];
96 *result |= (obj->buffer.pointer[1] << 8);
97 *result |= (obj->buffer.pointer[2] << 16);
98 *result |= (obj->buffer.pointer[3] << 24);
99 }
Jiang Liub072e532013-12-19 20:38:22 +0800100 ACPI_FREE(obj);
Dave Airlief19467c2011-03-22 14:10:27 +1000101 }
102
Dave Airlief19467c2011-03-22 14:10:27 +1000103 return 0;
104}
105
Jiang Liue2841752014-02-20 17:23:16 +0800106/*
107 * On some platforms, _DSM(nouveau_op_dsm_muid, func0) has special
108 * requirements on the fourth parameter, so a private implementation
109 * instead of using acpi_check_dsm().
110 */
Peter Wua12e78d2016-07-15 15:12:16 +0200111static int nouveau_dsm_get_optimus_functions(acpi_handle handle)
Jiang Liue2841752014-02-20 17:23:16 +0800112{
113 int result;
114
115 /*
116 * Function 0 returns a Buffer containing available functions.
117 * The args parameter is ignored for function 0, so just put 0 in it
118 */
119 if (nouveau_optimus_dsm(handle, 0, 0, &result))
120 return 0;
121
122 /*
123 * ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported.
124 * If the n-th bit is enabled, function n is supported
125 */
Peter Wua12e78d2016-07-15 15:12:16 +0200126 if (result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS))
127 return result;
128 return 0;
Jiang Liue2841752014-02-20 17:23:16 +0800129}
130
Jiang Liub072e532013-12-19 20:38:22 +0800131static int nouveau_dsm(acpi_handle handle, int func, int arg)
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000132{
Jiang Liub072e532013-12-19 20:38:22 +0800133 int ret = 0;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000134 union acpi_object *obj;
Jiang Liub072e532013-12-19 20:38:22 +0800135 union acpi_object argv4 = {
136 .integer.type = ACPI_TYPE_INTEGER,
137 .integer.value = arg,
138 };
Ben Skeggs6ee73862009-12-11 19:24:15 +1000139
Andy Shevchenko94116f82017-06-05 19:40:46 +0300140 obj = acpi_evaluate_dsm_typed(handle, &nouveau_dsm_muid, 0x00000102,
Jiang Liub072e532013-12-19 20:38:22 +0800141 func, &argv4, ACPI_TYPE_INTEGER);
142 if (!obj) {
143 acpi_handle_info(handle, "failed to evaluate _DSM\n");
144 return AE_ERROR;
145 } else {
Ben Skeggs6ee73862009-12-11 19:24:15 +1000146 if (obj->integer.value == 0x80000002)
Jiang Liub072e532013-12-19 20:38:22 +0800147 ret = -ENODEV;
148 ACPI_FREE(obj);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000149 }
150
Jiang Liub072e532013-12-19 20:38:22 +0800151 return ret;
Peter Lekensteyn9075e852011-12-17 12:53:43 +0100152}
153
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000154static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
Ben Skeggs6ee73862009-12-11 19:24:15 +1000155{
Dave Airlie000703f2011-05-09 11:40:25 +1000156 mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
Dave Airlie81161882010-12-06 12:57:45 +1000157 mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
Jiang Liub072e532013-12-19 20:38:22 +0800158 return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000159}
Ben Skeggs6ee73862009-12-11 19:24:15 +1000160
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000161static 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;
Jiang Liub072e532013-12-19 20:38:22 +0800168 nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000169 return 0;
170}
171
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000172static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
Ben Skeggs6ee73862009-12-11 19:24:15 +1000173{
Dave Airliec839d742012-11-02 11:04:27 +1000174 if (!nouveau_dsm_priv.dsm_detected)
Peter Lekensteynd0992302011-12-17 12:54:04 +0100175 return 0;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000176 if (id == VGA_SWITCHEROO_IGD)
Dave Airliefc5ea292010-05-31 17:10:52 +1000177 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000178 else
Dave Airliefc5ea292010-05-31 17:10:52 +1000179 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000180}
Ben Skeggs6ee73862009-12-11 19:24:15 +1000181
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000182static 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
Peter Lekensteynd0992302011-12-17 12:54:04 +0100188 /* Optimus laptops have the card already disabled in
189 * nouveau_switcheroo_set_state */
Dave Airliec839d742012-11-02 11:04:27 +1000190 if (!nouveau_dsm_priv.dsm_detected)
Peter Lekensteynd0992302011-12-17 12:54:04 +0100191 return 0;
192
Dave Airliefc5ea292010-05-31 17:10:52 +1000193 return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000194}
195
Luc Van Oostenryckf43cda52018-04-24 15:15:38 +0200196static enum vga_switcheroo_client_id nouveau_dsm_get_client_id(struct pci_dev *pdev)
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000197{
Dave Airlied1fbd9232010-12-06 12:56:44 +1000198 /* easy option one - intel vendor ID means Integrated */
199 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000200 return VGA_SWITCHEROO_IGD;
Dave Airlied1fbd9232010-12-06 12:56:44 +1000201
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;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000207}
208
Lukas Wunner5d170132015-10-18 13:05:40 +0200209static const struct vga_switcheroo_handler nouveau_dsm_handler = {
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000210 .switchto = nouveau_dsm_switchto,
211 .power_state = nouveau_dsm_power_state,
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000212 .get_client_id = nouveau_dsm_get_client_id,
213};
214
Peter Wu692a17d2016-07-15 15:12:18 +0200215/*
216 * Firmware supporting Windows 8 or later do not use _DSM to put the device into
217 * D3cold, they instead rely on disabling power resources on the parent.
218 */
219static bool nouveau_pr3_present(struct pci_dev *pdev)
220{
221 struct pci_dev *parent_pdev = pci_upstream_bridge(pdev);
222 struct acpi_device *parent_adev;
223
224 if (!parent_pdev)
225 return false;
226
Peter Wu279cf3f2016-08-26 01:00:54 +0200227 if (!parent_pdev->bridge_d3) {
228 /*
229 * Parent PCI bridge is currently not power managed.
230 * Since userspace can change these afterwards to be on
231 * the safe side we stick with _DSM and prevent usage of
232 * _PR3 from the bridge.
233 */
234 pci_d3cold_disable(pdev);
235 return false;
236 }
237
Peter Wu692a17d2016-07-15 15:12:18 +0200238 parent_adev = ACPI_COMPANION(&parent_pdev->dev);
239 if (!parent_adev)
240 return false;
241
Peter Wub0a6af82016-10-31 23:48:22 +0100242 return parent_adev->power.flags.power_resources &&
243 acpi_has_method(parent_adev->handle, "_PR3");
Peter Wu692a17d2016-07-15 15:12:18 +0200244}
245
Peter Wudf421942016-07-15 15:12:15 +0200246static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out,
Peter Wucba97802016-07-15 15:12:17 +0200247 bool *has_mux, bool *has_opt,
Peter Wu692a17d2016-07-15 15:12:18 +0200248 bool *has_opt_flags, bool *has_pr3)
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000249{
Zhang Rui187b5b52013-09-03 08:32:00 +0800250 acpi_handle dhandle;
Peter Wudf421942016-07-15 15:12:15 +0200251 bool supports_mux;
Peter Wua12e78d2016-07-15 15:12:16 +0200252 int optimus_funcs;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000253
Rafael J. Wysocki3a83f992013-11-14 23:17:21 +0100254 dhandle = ACPI_HANDLE(&pdev->dev);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000255 if (!dhandle)
Peter Wudf421942016-07-15 15:12:15 +0200256 return;
Dave Airlieafeb3e12010-04-07 13:55:09 +1000257
Bjorn Helgaasf91ce352014-09-10 15:30:08 -0600258 if (!acpi_has_method(dhandle, "_DSM"))
Peter Wudf421942016-07-15 15:12:15 +0200259 return;
Bjorn Helgaasf91ce352014-09-10 15:30:08 -0600260
Andy Shevchenko94116f82017-06-05 19:40:46 +0300261 supports_mux = acpi_check_dsm(dhandle, &nouveau_dsm_muid, 0x00000102,
Peter Wudf421942016-07-15 15:12:15 +0200262 1 << NOUVEAU_DSM_POWER);
Peter Wua12e78d2016-07-15 15:12:16 +0200263 optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000264
Peter Wudf421942016-07-15 15:12:15 +0200265 /* Does not look like a Nvidia device. */
Peter Wua12e78d2016-07-15 15:12:16 +0200266 if (!supports_mux && !optimus_funcs)
Peter Wudf421942016-07-15 15:12:15 +0200267 return;
Dave Airlief19467c2011-03-22 14:10:27 +1000268
Peter Wudf421942016-07-15 15:12:15 +0200269 *dhandle_out = dhandle;
270 *has_mux = supports_mux;
Peter Wua12e78d2016-07-15 15:12:16 +0200271 *has_opt = !!optimus_funcs;
Peter Wucba97802016-07-15 15:12:17 +0200272 *has_opt_flags = optimus_funcs & (1 << NOUVEAU_DSM_OPTIMUS_FLAGS);
Peter Wu692a17d2016-07-15 15:12:18 +0200273 *has_pr3 = false;
Peter Wudf421942016-07-15 15:12:15 +0200274
Peter Wua12e78d2016-07-15 15:12:16 +0200275 if (optimus_funcs) {
Dave Airlie5addcf02012-09-10 14:20:51 +1000276 uint32_t result;
277 nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0,
278 &result);
279 dev_info(&pdev->dev, "optimus capabilities: %s, status %s%s\n",
280 (result & OPTIMUS_ENABLED) ? "enabled" : "disabled",
281 (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "",
282 (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : "");
Peter Wu692a17d2016-07-15 15:12:18 +0200283
284 *has_pr3 = nouveau_pr3_present(pdev);
Dave Airlie5addcf02012-09-10 14:20:51 +1000285 }
Ben Skeggs6ee73862009-12-11 19:24:15 +1000286}
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000287
288static bool nouveau_dsm_detect(void)
289{
290 char acpi_method_name[255] = { 0 };
291 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
292 struct pci_dev *pdev = NULL;
Peter Wudf421942016-07-15 15:12:15 +0200293 acpi_handle dhandle = NULL;
294 bool has_mux = false;
295 bool has_optimus = false;
Peter Wucba97802016-07-15 15:12:17 +0200296 bool has_optimus_flags = false;
Peter Wu692a17d2016-07-15 15:12:18 +0200297 bool has_power_resources = false;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000298 int vga_count = 0;
Dave Airlie81161882010-12-06 12:57:45 +1000299 bool guid_valid;
Dave Airlief19467c2011-03-22 14:10:27 +1000300 bool ret = false;
Dave Airlie81161882010-12-06 12:57:45 +1000301
Dave Airlief19467c2011-03-22 14:10:27 +1000302 /* lookup the MXM GUID */
Dave Airlie81161882010-12-06 12:57:45 +1000303 guid_valid = mxm_wmi_supported();
Dave Airlie81161882010-12-06 12:57:45 +1000304
Dave Airlief19467c2011-03-22 14:10:27 +1000305 if (guid_valid)
306 printk("MXM: GUID detected in BIOS\n");
Dave Airlieafeb3e12010-04-07 13:55:09 +1000307
Dave Airlief19467c2011-03-22 14:10:27 +1000308 /* now do DSM detection */
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000309 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
310 vga_count++;
311
Peter Wucba97802016-07-15 15:12:17 +0200312 nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
Peter Wu692a17d2016-07-15 15:12:18 +0200313 &has_optimus_flags, &has_power_resources);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000314 }
315
Emil Velikov4c60fac2013-10-09 08:25:16 +0100316 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) {
317 vga_count++;
318
Peter Wucba97802016-07-15 15:12:17 +0200319 nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
Peter Wu692a17d2016-07-15 15:12:18 +0200320 &has_optimus_flags, &has_power_resources);
Emil Velikov4c60fac2013-10-09 08:25:16 +0100321 }
322
Dave Airliec839d742012-11-02 11:04:27 +1000323 /* find the optimus DSM or the old v1 DSM */
Peter Wudf421942016-07-15 15:12:15 +0200324 if (has_optimus) {
325 nouveau_dsm_priv.dhandle = dhandle;
Dave Airliec839d742012-11-02 11:04:27 +1000326 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
327 &buffer);
Joe Perches8dfe1622017-02-28 04:55:54 -0800328 pr_info("VGA switcheroo: detected Optimus DSM method %s handle\n",
Dave Airliec839d742012-11-02 11:04:27 +1000329 acpi_method_name);
Peter Wu692a17d2016-07-15 15:12:18 +0200330 if (has_power_resources)
331 pr_info("nouveau: detected PR support, will not use DSM\n");
Dave Airliec839d742012-11-02 11:04:27 +1000332 nouveau_dsm_priv.optimus_detected = true;
Peter Wucba97802016-07-15 15:12:17 +0200333 nouveau_dsm_priv.optimus_flags_detected = has_optimus_flags;
Peter Wu692a17d2016-07-15 15:12:18 +0200334 nouveau_dsm_priv.optimus_skip_dsm = has_power_resources;
Dave Airliec839d742012-11-02 11:04:27 +1000335 ret = true;
Peter Wudf421942016-07-15 15:12:15 +0200336 } else if (vga_count == 2 && has_mux && guid_valid) {
337 nouveau_dsm_priv.dhandle = dhandle;
Peter Lekensteynd0992302011-12-17 12:54:04 +0100338 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
339 &buffer);
Joe Perches8dfe1622017-02-28 04:55:54 -0800340 pr_info("VGA switcheroo: detected DSM switching method %s handle\n",
Peter Lekensteynd0992302011-12-17 12:54:04 +0100341 acpi_method_name);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000342 nouveau_dsm_priv.dsm_detected = true;
Dave Airlief19467c2011-03-22 14:10:27 +1000343 ret = true;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000344 }
Dave Airlief19467c2011-03-22 14:10:27 +1000345
Dave Airlief19467c2011-03-22 14:10:27 +1000346
347 return ret;
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000348}
349
350void nouveau_register_dsm_handler(void)
351{
352 bool r;
353
354 r = nouveau_dsm_detect();
355 if (!r)
356 return;
357
Lukas Wunner156d7d42016-01-11 20:09:20 +0100358 vga_switcheroo_register_handler(&nouveau_dsm_handler, 0);
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000359}
360
Peter Lekensteynd0992302011-12-17 12:54:04 +0100361/* Must be called for Optimus models before the card can be turned off */
362void nouveau_switcheroo_optimus_dsm(void)
363{
364 u32 result = 0;
Peter Wu692a17d2016-07-15 15:12:18 +0200365 if (!nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.optimus_skip_dsm)
Peter Lekensteynd0992302011-12-17 12:54:04 +0100366 return;
367
Peter Wucba97802016-07-15 15:12:17 +0200368 if (nouveau_dsm_priv.optimus_flags_detected)
369 nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FLAGS,
370 0x3, &result);
Dave Airlie5addcf02012-09-10 14:20:51 +1000371
372 nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_CAPS,
373 NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN, &result);
374
Peter Lekensteynd0992302011-12-17 12:54:04 +0100375}
376
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000377void nouveau_unregister_dsm_handler(void)
378{
Andreas Heider2f3787a2012-05-21 00:14:50 +0100379 if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected)
380 vga_switcheroo_unregister_handler();
Dave Airlie6a9ee8a2010-02-01 15:38:10 +1000381}
Jeff Mahoneyd0ce7b8562014-01-21 14:34:52 -0800382#else
383void nouveau_register_dsm_handler(void) {}
384void nouveau_unregister_dsm_handler(void) {}
385void nouveau_switcheroo_optimus_dsm(void) {}
386#endif
Dave Airlieafeb3e12010-04-07 13:55:09 +1000387
388/* retrieve the ROM in 4k blocks */
389static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
390 int offset, int len)
391{
392 acpi_status status;
393 union acpi_object rom_arg_elements[2], *obj;
394 struct acpi_object_list rom_arg;
395 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
396
397 rom_arg.count = 2;
398 rom_arg.pointer = &rom_arg_elements[0];
399
400 rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
401 rom_arg_elements[0].integer.value = offset;
402
403 rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
404 rom_arg_elements[1].integer.value = len;
405
406 status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
407 if (ACPI_FAILURE(status)) {
Joe Perches8dfe1622017-02-28 04:55:54 -0800408 pr_info("failed to evaluate ROM got %s\n",
409 acpi_format_exception(status));
Dave Airlieafeb3e12010-04-07 13:55:09 +1000410 return -ENODEV;
411 }
412 obj = (union acpi_object *)buffer.pointer;
Ben Skeggs95432942015-11-19 13:18:34 +1000413 len = min(len, (int)obj->buffer.length);
Dave Airlieafeb3e12010-04-07 13:55:09 +1000414 memcpy(bios+offset, obj->buffer.pointer, len);
415 kfree(buffer.pointer);
416 return len;
417}
418
Ben Skeggs26c9e8e2015-08-20 14:54:23 +1000419bool nouveau_acpi_rom_supported(struct device *dev)
Dave Airlieafeb3e12010-04-07 13:55:09 +1000420{
421 acpi_status status;
422 acpi_handle dhandle, rom_handle;
423
Ben Skeggs26c9e8e2015-08-20 14:54:23 +1000424 dhandle = ACPI_HANDLE(dev);
Dave Airlieafeb3e12010-04-07 13:55:09 +1000425 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}
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000440
Ben Skeggsc0077062012-07-26 08:51:21 +1000441void *
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000442nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
443{
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000444 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:
Ben Skeggsc0077062012-07-26 08:51:21 +1000455 return NULL;
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000456 }
457
Rafael J. Wysocki3a83f992013-11-14 23:17:21 +0100458 handle = ACPI_HANDLE(&dev->pdev->dev);
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000459 if (!handle)
Ben Skeggsc0077062012-07-26 08:51:21 +1000460 return NULL;
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000461
462 ret = acpi_bus_get_device(handle, &acpidev);
463 if (ret)
Ben Skeggsc0077062012-07-26 08:51:21 +1000464 return NULL;
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000465
466 ret = acpi_video_get_edid(acpidev, type, -1, &edid);
467 if (ret < 0)
Ben Skeggsc0077062012-07-26 08:51:21 +1000468 return NULL;
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000469
Ben Skeggsc0077062012-07-26 08:51:21 +1000470 return kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
Ben Skeggsa6ed76d2010-07-12 15:33:07 +1000471}