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_LED 0x02
22 #define NOUVEAU_DSM_LED_STATE 0x00
23 #define NOUVEAU_DSM_LED_OFF 0x10
24 #define NOUVEAU_DSM_LED_STAMINA 0x11
25 #define NOUVEAU_DSM_LED_SPEED 0x12
27 #define NOUVEAU_DSM_POWER 0x03
28 #define NOUVEAU_DSM_POWER_STATE 0x00
29 #define NOUVEAU_DSM_POWER_SPEED 0x01
30 #define NOUVEAU_DSM_POWER_STAMINA 0x02
32 #define NOUVEAU_DSM_OPTIMUS_FN 0x1A
33 #define NOUVEAU_DSM_OPTIMUS_ARGS 0x03000001
35 static struct nouveau_dsm_priv {
37 bool optimus_detected;
39 acpi_handle rom_handle;
42 #define NOUVEAU_DSM_HAS_MUX 0x1
43 #define NOUVEAU_DSM_HAS_OPT 0x2
45 #ifdef CONFIG_VGA_SWITCHEROO
46 static const char nouveau_dsm_muid[] = {
47 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
48 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
51 static const char nouveau_op_dsm_muid[] = {
52 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
53 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
56 static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
58 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
59 struct acpi_object_list input;
60 union acpi_object params[4];
61 union acpi_object *obj;
66 input.pointer = params;
67 params[0].type = ACPI_TYPE_BUFFER;
68 params[0].buffer.length = sizeof(nouveau_op_dsm_muid);
69 params[0].buffer.pointer = (char *)nouveau_op_dsm_muid;
70 params[1].type = ACPI_TYPE_INTEGER;
71 params[1].integer.value = 0x00000100;
72 params[2].type = ACPI_TYPE_INTEGER;
73 params[2].integer.value = func;
74 params[3].type = ACPI_TYPE_BUFFER;
75 params[3].buffer.length = 4;
76 /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */
77 for (i = 0; i < 4; i++)
78 args_buff[i] = (arg >> i * 8) & 0xFF;
79 params[3].buffer.pointer = args_buff;
81 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
83 printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
87 obj = (union acpi_object *)output.pointer;
89 if (obj->type == ACPI_TYPE_INTEGER)
90 if (obj->integer.value == 0x80000002) {
94 if (obj->type == ACPI_TYPE_BUFFER) {
95 if (obj->buffer.length == 4 && result) {
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);
104 kfree(output.pointer);
108 static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
110 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
111 struct acpi_object_list input;
112 union acpi_object params[4];
113 union acpi_object *obj;
117 input.pointer = params;
118 params[0].type = ACPI_TYPE_BUFFER;
119 params[0].buffer.length = sizeof(nouveau_dsm_muid);
120 params[0].buffer.pointer = (char *)nouveau_dsm_muid;
121 params[1].type = ACPI_TYPE_INTEGER;
122 params[1].integer.value = 0x00000102;
123 params[2].type = ACPI_TYPE_INTEGER;
124 params[2].integer.value = func;
125 params[3].type = ACPI_TYPE_INTEGER;
126 params[3].integer.value = arg;
128 err = acpi_evaluate_object(handle, "_DSM", &input, &output);
130 printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
134 obj = (union acpi_object *)output.pointer;
136 if (obj->type == ACPI_TYPE_INTEGER)
137 if (obj->integer.value == 0x80000002)
140 if (obj->type == ACPI_TYPE_BUFFER) {
141 if (obj->buffer.length == 4 && result) {
143 *result |= obj->buffer.pointer[0];
144 *result |= (obj->buffer.pointer[1] << 8);
145 *result |= (obj->buffer.pointer[2] << 16);
146 *result |= (obj->buffer.pointer[3] << 24);
150 kfree(output.pointer);
154 /* Returns 1 if a DSM function is usable and 0 otherwise */
155 static int nouveau_test_dsm(acpi_handle test_handle,
156 int (*dsm_func)(acpi_handle, int, int, uint32_t *),
161 /* Function 0 returns a Buffer containing available functions. The args
162 * parameter is ignored for function 0, so just put 0 in it */
163 if (dsm_func(test_handle, 0, 0, &result))
166 /* ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. If
167 * the n-th bit is enabled, function n is supported */
168 return result & 1 && result & (1 << sfnc);
171 static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
173 mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
174 mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
175 return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
178 static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
181 if (state == VGA_SWITCHEROO_ON)
182 arg = NOUVEAU_DSM_POWER_SPEED;
184 arg = NOUVEAU_DSM_POWER_STAMINA;
185 nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL);
189 static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
191 /* perhaps the _DSM functions are mutually exclusive, but prepare for
193 if (!nouveau_dsm_priv.dsm_detected && nouveau_dsm_priv.optimus_detected)
195 if (id == VGA_SWITCHEROO_IGD)
196 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
198 return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED);
201 static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
202 enum vga_switcheroo_state state)
204 if (id == VGA_SWITCHEROO_IGD)
207 /* Optimus laptops have the card already disabled in
208 * nouveau_switcheroo_set_state */
209 if (!nouveau_dsm_priv.dsm_detected && nouveau_dsm_priv.optimus_detected)
212 return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
215 static int nouveau_dsm_init(void)
220 static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
222 /* easy option one - intel vendor ID means Integrated */
223 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
224 return VGA_SWITCHEROO_IGD;
226 /* is this device on Bus 0? - this may need improving */
227 if (pdev->bus->number == 0)
228 return VGA_SWITCHEROO_IGD;
230 return VGA_SWITCHEROO_DIS;
233 static struct vga_switcheroo_handler nouveau_dsm_handler = {
234 .switchto = nouveau_dsm_switchto,
235 .power_state = nouveau_dsm_power_state,
236 .init = nouveau_dsm_init,
237 .get_client_id = nouveau_dsm_get_client_id,
240 static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
242 acpi_handle dhandle, nvidia_handle;
246 dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
250 status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
251 if (ACPI_FAILURE(status)) {
255 if (nouveau_test_dsm(dhandle, nouveau_dsm, NOUVEAU_DSM_POWER))
256 retval |= NOUVEAU_DSM_HAS_MUX;
258 if (nouveau_test_dsm(dhandle, nouveau_optimus_dsm,
259 NOUVEAU_DSM_OPTIMUS_FN))
260 retval |= NOUVEAU_DSM_HAS_OPT;
263 nouveau_dsm_priv.dhandle = dhandle;
268 static bool nouveau_dsm_detect(void)
270 char acpi_method_name[255] = { 0 };
271 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
272 struct pci_dev *pdev = NULL;
280 /* lookup the MXM GUID */
281 guid_valid = mxm_wmi_supported();
284 printk("MXM: GUID detected in BIOS\n");
286 /* now do DSM detection */
287 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
290 retval = nouveau_dsm_pci_probe(pdev);
291 if (retval & NOUVEAU_DSM_HAS_MUX)
293 if (retval & NOUVEAU_DSM_HAS_OPT)
297 if (vga_count == 2 && has_dsm && guid_valid) {
298 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
300 printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
302 nouveau_dsm_priv.dsm_detected = true;
306 if (has_optimus == 1) {
307 acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
309 printk(KERN_INFO "VGA switcheroo: detected Optimus DSM method %s handle\n",
311 nouveau_dsm_priv.optimus_detected = true;
318 void nouveau_register_dsm_handler(void)
322 r = nouveau_dsm_detect();
326 vga_switcheroo_register_handler(&nouveau_dsm_handler);
329 /* Must be called for Optimus models before the card can be turned off */
330 void nouveau_switcheroo_optimus_dsm(void)
333 if (!nouveau_dsm_priv.optimus_detected)
336 nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FN,
337 NOUVEAU_DSM_OPTIMUS_ARGS, &result);
340 void nouveau_unregister_dsm_handler(void)
342 vga_switcheroo_unregister_handler();
345 void nouveau_register_dsm_handler(void) {}
346 void nouveau_unregister_dsm_handler(void) {}
349 /* retrieve the ROM in 4k blocks */
350 static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
354 union acpi_object rom_arg_elements[2], *obj;
355 struct acpi_object_list rom_arg;
356 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
359 rom_arg.pointer = &rom_arg_elements[0];
361 rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
362 rom_arg_elements[0].integer.value = offset;
364 rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
365 rom_arg_elements[1].integer.value = len;
367 status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
368 if (ACPI_FAILURE(status)) {
369 printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status));
372 obj = (union acpi_object *)buffer.pointer;
373 memcpy(bios+offset, obj->buffer.pointer, len);
374 kfree(buffer.pointer);
378 bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
381 acpi_handle dhandle, rom_handle;
383 if (!nouveau_dsm_priv.dsm_detected && !nouveau_dsm_priv.optimus_detected)
386 dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
390 status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
391 if (ACPI_FAILURE(status))
394 nouveau_dsm_priv.rom_handle = rom_handle;
398 int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
400 return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
404 nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
406 struct nouveau_connector *nv_connector = nouveau_connector(connector);
407 struct acpi_device *acpidev;
412 switch (connector->connector_type) {
413 case DRM_MODE_CONNECTOR_LVDS:
414 case DRM_MODE_CONNECTOR_eDP:
415 type = ACPI_VIDEO_DISPLAY_LCD;
421 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
425 ret = acpi_bus_get_device(handle, &acpidev);
429 ret = acpi_video_get_edid(acpidev, type, -1, &edid);
433 nv_connector->edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);