402 lines
11 KiB
C
402 lines
11 KiB
C
// SPDX-License-Identifier: MIT
|
|
#include <linux/pci.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mxm-wmi.h>
|
|
#include <linux/vga_switcheroo.h>
|
|
#include <drm/drm_edid.h>
|
|
#include <acpi/video.h>
|
|
|
|
#include "nouveau_drv.h"
|
|
#include "nouveau_acpi.h"
|
|
|
|
#define NOUVEAU_DSM_LED 0x02
|
|
#define NOUVEAU_DSM_LED_STATE 0x00
|
|
#define NOUVEAU_DSM_LED_OFF 0x10
|
|
#define NOUVEAU_DSM_LED_STAMINA 0x11
|
|
#define NOUVEAU_DSM_LED_SPEED 0x12
|
|
|
|
#define NOUVEAU_DSM_POWER 0x03
|
|
#define NOUVEAU_DSM_POWER_STATE 0x00
|
|
#define NOUVEAU_DSM_POWER_SPEED 0x01
|
|
#define NOUVEAU_DSM_POWER_STAMINA 0x02
|
|
|
|
#define NOUVEAU_DSM_OPTIMUS_CAPS 0x1A
|
|
#define NOUVEAU_DSM_OPTIMUS_FLAGS 0x1B
|
|
|
|
#define NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 (3 << 24)
|
|
#define NOUVEAU_DSM_OPTIMUS_NO_POWERDOWN_PS3 (2 << 24)
|
|
#define NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED (1)
|
|
|
|
#define NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN (NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 | NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED)
|
|
|
|
/* result of the optimus caps function */
|
|
#define OPTIMUS_ENABLED (1 << 0)
|
|
#define OPTIMUS_STATUS_MASK (3 << 3)
|
|
#define OPTIMUS_STATUS_OFF (0 << 3)
|
|
#define OPTIMUS_STATUS_ON_ENABLED (1 << 3)
|
|
#define OPTIMUS_STATUS_PWR_STABLE (3 << 3)
|
|
#define OPTIMUS_DISPLAY_HOTPLUG (1 << 6)
|
|
#define OPTIMUS_CAPS_MASK (7 << 24)
|
|
#define OPTIMUS_DYNAMIC_PWR_CAP (1 << 24)
|
|
|
|
#define OPTIMUS_AUDIO_CAPS_MASK (3 << 27)
|
|
#define OPTIMUS_HDA_CODEC_MASK (2 << 27) /* hda bios control */
|
|
|
|
static struct nouveau_dsm_priv {
|
|
bool dsm_detected;
|
|
bool optimus_detected;
|
|
bool optimus_flags_detected;
|
|
bool optimus_skip_dsm;
|
|
acpi_handle dhandle;
|
|
} nouveau_dsm_priv;
|
|
|
|
bool nouveau_is_optimus(void) {
|
|
return nouveau_dsm_priv.optimus_detected;
|
|
}
|
|
|
|
bool nouveau_is_v1_dsm(void) {
|
|
return nouveau_dsm_priv.dsm_detected;
|
|
}
|
|
|
|
#ifdef CONFIG_VGA_SWITCHEROO
|
|
static const guid_t nouveau_dsm_muid =
|
|
GUID_INIT(0x9D95A0A0, 0x0060, 0x4D48,
|
|
0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4);
|
|
|
|
static const guid_t nouveau_op_dsm_muid =
|
|
GUID_INIT(0xA486D8F8, 0x0BDA, 0x471B,
|
|
0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0);
|
|
|
|
static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
|
|
{
|
|
int i;
|
|
union acpi_object *obj;
|
|
char args_buff[4];
|
|
union acpi_object argv4 = {
|
|
.buffer.type = ACPI_TYPE_BUFFER,
|
|
.buffer.length = 4,
|
|
.buffer.pointer = args_buff
|
|
};
|
|
|
|
/* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */
|
|
for (i = 0; i < 4; i++)
|
|
args_buff[i] = (arg >> i * 8) & 0xFF;
|
|
|
|
*result = 0;
|
|
obj = acpi_evaluate_dsm_typed(handle, &nouveau_op_dsm_muid, 0x00000100,
|
|
func, &argv4, ACPI_TYPE_BUFFER);
|
|
if (!obj) {
|
|
acpi_handle_info(handle, "failed to evaluate _DSM\n");
|
|
return AE_ERROR;
|
|
} else {
|
|
if (obj->buffer.length == 4) {
|
|
*result |= obj->buffer.pointer[0];
|
|
*result |= (obj->buffer.pointer[1] << 8);
|
|
*result |= (obj->buffer.pointer[2] << 16);
|
|
*result |= (obj->buffer.pointer[3] << 24);
|
|
}
|
|
ACPI_FREE(obj);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* On some platforms, _DSM(nouveau_op_dsm_muid, func0) has special
|
|
* requirements on the fourth parameter, so a private implementation
|
|
* instead of using acpi_check_dsm().
|
|
*/
|
|
static int nouveau_dsm_get_optimus_functions(acpi_handle handle)
|
|
{
|
|
int result;
|
|
|
|
/*
|
|
* Function 0 returns a Buffer containing available functions.
|
|
* The args parameter is ignored for function 0, so just put 0 in it
|
|
*/
|
|
if (nouveau_optimus_dsm(handle, 0, 0, &result))
|
|
return 0;
|
|
|
|
/*
|
|
* ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported.
|
|
* If the n-th bit is enabled, function n is supported
|
|
*/
|
|
if (result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS))
|
|
return result;
|
|
return 0;
|
|
}
|
|
|
|
static int nouveau_dsm(acpi_handle handle, int func, int arg)
|
|
{
|
|
int ret = 0;
|
|
union acpi_object *obj;
|
|
union acpi_object argv4 = {
|
|
.integer.type = ACPI_TYPE_INTEGER,
|
|
.integer.value = arg,
|
|
};
|
|
|
|
obj = acpi_evaluate_dsm_typed(handle, &nouveau_dsm_muid, 0x00000102,
|
|
func, &argv4, ACPI_TYPE_INTEGER);
|
|
if (!obj) {
|
|
acpi_handle_info(handle, "failed to evaluate _DSM\n");
|
|
return AE_ERROR;
|
|
} else {
|
|
if (obj->integer.value == 0x80000002)
|
|
ret = -ENODEV;
|
|
ACPI_FREE(obj);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
|
|
{
|
|
mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
|
|
mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
|
|
return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id);
|
|
}
|
|
|
|
static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
|
|
{
|
|
int arg;
|
|
if (state == VGA_SWITCHEROO_ON)
|
|
arg = NOUVEAU_DSM_POWER_SPEED;
|
|
else
|
|
arg = NOUVEAU_DSM_POWER_STAMINA;
|
|
nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg);
|
|
return 0;
|
|
}
|
|
|
|
static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
|
|
{
|
|
if (!nouveau_dsm_priv.dsm_detected)
|
|
return 0;
|
|
if (id == VGA_SWITCHEROO_IGD)
|
|
return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
|
|
else
|
|
return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED);
|
|
}
|
|
|
|
static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
|
|
enum vga_switcheroo_state state)
|
|
{
|
|
if (id == VGA_SWITCHEROO_IGD)
|
|
return 0;
|
|
|
|
/* Optimus laptops have the card already disabled in
|
|
* nouveau_switcheroo_set_state */
|
|
if (!nouveau_dsm_priv.dsm_detected)
|
|
return 0;
|
|
|
|
return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
|
|
}
|
|
|
|
static enum vga_switcheroo_client_id nouveau_dsm_get_client_id(struct pci_dev *pdev)
|
|
{
|
|
/* easy option one - intel vendor ID means Integrated */
|
|
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
|
|
return VGA_SWITCHEROO_IGD;
|
|
|
|
/* is this device on Bus 0? - this may need improving */
|
|
if (pdev->bus->number == 0)
|
|
return VGA_SWITCHEROO_IGD;
|
|
|
|
return VGA_SWITCHEROO_DIS;
|
|
}
|
|
|
|
static const struct vga_switcheroo_handler nouveau_dsm_handler = {
|
|
.switchto = nouveau_dsm_switchto,
|
|
.power_state = nouveau_dsm_power_state,
|
|
.get_client_id = nouveau_dsm_get_client_id,
|
|
};
|
|
|
|
static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out,
|
|
bool *has_mux, bool *has_opt,
|
|
bool *has_opt_flags, bool *has_pr3)
|
|
{
|
|
acpi_handle dhandle;
|
|
bool supports_mux;
|
|
int optimus_funcs;
|
|
struct pci_dev *parent_pdev;
|
|
|
|
if (pdev->vendor != PCI_VENDOR_ID_NVIDIA)
|
|
return;
|
|
|
|
*has_pr3 = false;
|
|
parent_pdev = pci_upstream_bridge(pdev);
|
|
if (parent_pdev) {
|
|
if (parent_pdev->bridge_d3)
|
|
*has_pr3 = pci_pr3_present(parent_pdev);
|
|
else
|
|
pci_d3cold_disable(pdev);
|
|
}
|
|
|
|
dhandle = ACPI_HANDLE(&pdev->dev);
|
|
if (!dhandle)
|
|
return;
|
|
|
|
if (!acpi_has_method(dhandle, "_DSM"))
|
|
return;
|
|
|
|
supports_mux = acpi_check_dsm(dhandle, &nouveau_dsm_muid, 0x00000102,
|
|
1 << NOUVEAU_DSM_POWER);
|
|
optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle);
|
|
|
|
/* Does not look like a Nvidia device. */
|
|
if (!supports_mux && !optimus_funcs)
|
|
return;
|
|
|
|
*dhandle_out = dhandle;
|
|
*has_mux = supports_mux;
|
|
*has_opt = !!optimus_funcs;
|
|
*has_opt_flags = optimus_funcs & (1 << NOUVEAU_DSM_OPTIMUS_FLAGS);
|
|
|
|
if (optimus_funcs) {
|
|
uint32_t result;
|
|
nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0,
|
|
&result);
|
|
dev_info(&pdev->dev, "optimus capabilities: %s, status %s%s\n",
|
|
(result & OPTIMUS_ENABLED) ? "enabled" : "disabled",
|
|
(result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "",
|
|
(result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : "");
|
|
}
|
|
}
|
|
|
|
static bool nouveau_dsm_detect(void)
|
|
{
|
|
char acpi_method_name[255] = { 0 };
|
|
struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
|
|
struct pci_dev *pdev = NULL;
|
|
acpi_handle dhandle = NULL;
|
|
bool has_mux = false;
|
|
bool has_optimus = false;
|
|
bool has_optimus_flags = false;
|
|
bool has_power_resources = false;
|
|
int vga_count = 0;
|
|
bool guid_valid;
|
|
bool ret = false;
|
|
|
|
/* lookup the MXM GUID */
|
|
guid_valid = mxm_wmi_supported();
|
|
|
|
if (guid_valid)
|
|
printk("MXM: GUID detected in BIOS\n");
|
|
|
|
/* now do DSM detection */
|
|
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
|
|
vga_count++;
|
|
|
|
nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
|
|
&has_optimus_flags, &has_power_resources);
|
|
}
|
|
|
|
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) {
|
|
vga_count++;
|
|
|
|
nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
|
|
&has_optimus_flags, &has_power_resources);
|
|
}
|
|
|
|
/* find the optimus DSM or the old v1 DSM */
|
|
if (has_optimus) {
|
|
nouveau_dsm_priv.dhandle = dhandle;
|
|
acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
|
|
&buffer);
|
|
pr_info("VGA switcheroo: detected Optimus DSM method %s handle\n",
|
|
acpi_method_name);
|
|
if (has_power_resources)
|
|
pr_info("nouveau: detected PR support, will not use DSM\n");
|
|
nouveau_dsm_priv.optimus_detected = true;
|
|
nouveau_dsm_priv.optimus_flags_detected = has_optimus_flags;
|
|
nouveau_dsm_priv.optimus_skip_dsm = has_power_resources;
|
|
ret = true;
|
|
} else if (vga_count == 2 && has_mux && guid_valid) {
|
|
nouveau_dsm_priv.dhandle = dhandle;
|
|
acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
|
|
&buffer);
|
|
pr_info("VGA switcheroo: detected DSM switching method %s handle\n",
|
|
acpi_method_name);
|
|
nouveau_dsm_priv.dsm_detected = true;
|
|
ret = true;
|
|
}
|
|
|
|
|
|
return ret;
|
|
}
|
|
|
|
void nouveau_register_dsm_handler(void)
|
|
{
|
|
bool r;
|
|
|
|
r = nouveau_dsm_detect();
|
|
if (!r)
|
|
return;
|
|
|
|
vga_switcheroo_register_handler(&nouveau_dsm_handler, 0);
|
|
}
|
|
|
|
/* Must be called for Optimus models before the card can be turned off */
|
|
void nouveau_switcheroo_optimus_dsm(void)
|
|
{
|
|
u32 result = 0;
|
|
if (!nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.optimus_skip_dsm)
|
|
return;
|
|
|
|
if (nouveau_dsm_priv.optimus_flags_detected)
|
|
nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FLAGS,
|
|
0x3, &result);
|
|
|
|
nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_CAPS,
|
|
NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN, &result);
|
|
|
|
}
|
|
|
|
void nouveau_unregister_dsm_handler(void)
|
|
{
|
|
if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected)
|
|
vga_switcheroo_unregister_handler();
|
|
}
|
|
#else
|
|
void nouveau_register_dsm_handler(void) {}
|
|
void nouveau_unregister_dsm_handler(void) {}
|
|
void nouveau_switcheroo_optimus_dsm(void) {}
|
|
#endif
|
|
|
|
void *
|
|
nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
|
|
{
|
|
struct acpi_device *acpidev;
|
|
int type, ret;
|
|
void *edid;
|
|
|
|
switch (connector->connector_type) {
|
|
case DRM_MODE_CONNECTOR_LVDS:
|
|
case DRM_MODE_CONNECTOR_eDP:
|
|
type = ACPI_VIDEO_DISPLAY_LCD;
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
acpidev = ACPI_COMPANION(dev->dev);
|
|
if (!acpidev)
|
|
return NULL;
|
|
|
|
ret = acpi_video_get_edid(acpidev, type, -1, &edid);
|
|
if (ret < 0)
|
|
return NULL;
|
|
|
|
return kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
|
|
}
|
|
|
|
bool nouveau_acpi_video_backlight_use_native(void)
|
|
{
|
|
return acpi_video_backlight_use_native();
|
|
}
|
|
|
|
void nouveau_acpi_video_register_backlight(void)
|
|
{
|
|
acpi_video_register_backlight();
|
|
}
|