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>
8 #include <linux/mxm-wmi.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"
19 #include <linux/vga_switcheroo.h>
21 #define NOUVEAU_DSM_SUPPORTED 0x00
22 #define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00
24 #define NOUVEAU_DSM_ACTIVE 0x01
25 #define NOUVEAU_DSM_ACTIVE_QUERY 0x00
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
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
38 static struct nouveau_dsm_priv {
40 bool optimus_detected;
42 acpi_handle rom_handle;
45 #define NOUVEAU_DSM_HAS_MUX 0x1
46 #define NOUVEAU_DSM_HAS_OPT 0x2
48 static const char nouveau_dsm_muid[] = {
49 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
50 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
53 static const char nouveau_op_dsm_muid[] = {
54 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
55 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
58 static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
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;
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;
78 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
80 printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
84 obj = (union acpi_object *)output.pointer;
86 if (obj->type == ACPI_TYPE_INTEGER)
87 if (obj->integer.value == 0x80000002) {
91 if (obj->type == ACPI_TYPE_BUFFER) {
92 if (obj->buffer.length == 4 && result) {
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);
101 kfree(output.pointer);
105 static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
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;
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;
125 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
127 printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
131 obj = (union acpi_object *)output.pointer;
133 if (obj->type == ACPI_TYPE_INTEGER)
134 if (obj->integer.value == 0x80000002)
137 if (obj->type == ACPI_TYPE_BUFFER) {
138 if (obj->buffer.length == 4 && result) {
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);
147 kfree(output.pointer);
151 static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
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);
158 static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
161 if (state == VGA_SWITCHEROO_ON)
162 arg = NOUVEAU_DSM_POWER_SPEED;
164 arg = NOUVEAU_DSM_POWER_STAMINA;
165 nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL);
169 static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
171 if (id == VGA_SWITCHEROO_IGD)
172 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
174 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED);
177 static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
178 enum vga_switcheroo_state state)
180 if (id == VGA_SWITCHEROO_IGD)
183 return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
186 static int nouveau_dsm_init(void)
191 static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
193 /* easy option one - intel vendor ID means Integrated */
194 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
195 return VGA_SWITCHEROO_IGD;
197 /* is this device on Bus 0? - this may need improving */
198 if (pdev->bus->number == 0)
199 return VGA_SWITCHEROO_IGD;
201 return VGA_SWITCHEROO_DIS;
204 static 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,
211 static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
213 acpi_handle dhandle, nvidia_handle;
218 dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
222 status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
223 if (ACPI_FAILURE(status)) {
227 ret = nouveau_dsm(dhandle, NOUVEAU_DSM_SUPPORTED,
228 NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
230 retval |= NOUVEAU_DSM_HAS_MUX;
232 ret = nouveau_optimus_dsm(dhandle, 0, 0, &result);
234 retval |= NOUVEAU_DSM_HAS_OPT;
237 nouveau_dsm_priv.dhandle = dhandle;
242 static bool nouveau_dsm_detect(void)
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;
254 /* lookup the MXM GUID */
255 guid_valid = mxm_wmi_supported();
258 printk("MXM: GUID detected in BIOS\n");
260 /* now do DSM detection */
261 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
264 retval = nouveau_dsm_pci_probe(pdev);
265 if (retval & NOUVEAU_DSM_HAS_MUX)
267 if (retval & NOUVEAU_DSM_HAS_OPT)
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",
275 nouveau_dsm_priv.dsm_detected = true;
279 if (has_optimus == 1)
280 nouveau_dsm_priv.optimus_detected = true;
285 void nouveau_register_dsm_handler(void)
289 r = nouveau_dsm_detect();
293 vga_switcheroo_register_handler(&nouveau_dsm_handler);
296 void nouveau_unregister_dsm_handler(void)
298 vga_switcheroo_unregister_handler();
301 /* retrieve the ROM in 4k blocks */
302 static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
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};
311 rom_arg.pointer = &rom_arg_elements[0];
313 rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
314 rom_arg_elements[0].integer.value = offset;
316 rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
317 rom_arg_elements[1].integer.value = len;
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));
324 obj = (union acpi_object *)buffer.pointer;
325 memcpy(bios+offset, obj->buffer.pointer, len);
326 kfree(buffer.pointer);
330 bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
333 acpi_handle dhandle, rom_handle;
335 dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
339 status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
340 if (ACPI_FAILURE(status))
343 nouveau_dsm_priv.rom_handle = rom_handle;
347 int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
349 return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
353 nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
355 struct nouveau_connector *nv_connector = nouveau_connector(connector);
356 struct acpi_device *acpidev;
361 switch (connector->connector_type) {
362 case DRM_MODE_CONNECTOR_LVDS:
363 case DRM_MODE_CONNECTOR_eDP:
364 type = ACPI_VIDEO_DISPLAY_LCD;
370 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
374 ret = acpi_bus_get_device(handle, &acpidev);
378 ret = acpi_video_get_edid(acpidev, type, -1, &edid);
382 nv_connector->edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);