[PATCH 09/21] drm/nouveau/nvkm: move switcheroo init from drm
Ben Skeggs
bskeggs at nvidia.com
Thu Jun 13 17:00:01 UTC 2024
Signed-off-by: Ben Skeggs <bskeggs at nvidia.com>
---
drivers/gpu/drm/nouveau/nouveau_acpi.c | 344 ---------------------
drivers/gpu/drm/nouveau/nouveau_acpi.h | 7 +-
drivers/gpu/drm/nouveau/nouveau_drm.c | 2 -
drivers/gpu/drm/nouveau/nvkm/device/acpi.c | 339 +++++++++++++++++++-
drivers/gpu/drm/nouveau/nvkm/device/acpi.h | 19 ++
drivers/gpu/drm/nouveau/nvkm/module.c | 3 +
6 files changed, 362 insertions(+), 352 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 8f0c69aad248..b9c43fe552c0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -2,55 +2,12 @@
#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;
}
@@ -59,307 +16,6 @@ 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_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
- if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
- (pdev->class != PCI_CLASS_DISPLAY_3D << 8))
- continue;
-
- 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)
{
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.h b/drivers/gpu/drm/nouveau/nouveau_acpi.h
index e39dd8b94b8b..a7fac1f7a73d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.h
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.h
@@ -7,17 +7,14 @@
#if defined(CONFIG_ACPI) && defined(CONFIG_X86)
bool nouveau_is_optimus(void);
bool nouveau_is_v1_dsm(void);
-void nouveau_register_dsm_handler(void);
-void nouveau_unregister_dsm_handler(void);
-void nouveau_switcheroo_optimus_dsm(void);
+#include <device/acpi.h>
+static inline void nouveau_switcheroo_optimus_dsm(void) { nvkm_acpi_switcheroo_set_powerdown(); }
void *nouveau_acpi_edid(struct drm_device *, struct drm_connector *);
bool nouveau_acpi_video_backlight_use_native(void);
void nouveau_acpi_video_register_backlight(void);
#else
static inline bool nouveau_is_optimus(void) { return false; };
static inline bool nouveau_is_v1_dsm(void) { return false; };
-static inline void nouveau_register_dsm_handler(void) {}
-static inline void nouveau_unregister_dsm_handler(void) {}
static inline void nouveau_switcheroo_optimus_dsm(void) {}
static inline void *nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) { return NULL; }
static inline bool nouveau_acpi_video_backlight_use_native(void) { return true; }
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 6c1cfc38d8fa..0ac17da04819 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -1399,7 +1399,6 @@ nouveau_drm_init(void)
platform_driver_register(&nouveau_platform_driver);
#endif
- nouveau_register_dsm_handler();
nouveau_backlight_ctor();
#ifdef CONFIG_PCI
@@ -1419,7 +1418,6 @@ nouveau_drm_exit(void)
pci_unregister_driver(&nouveau_drm_pci_driver);
#endif
nouveau_backlight_dtor();
- nouveau_unregister_dsm_handler();
#ifdef CONFIG_NOUVEAU_PLATFORM_DRIVER
platform_driver_unregister(&nouveau_platform_driver);
diff --git a/drivers/gpu/drm/nouveau/nvkm/device/acpi.c b/drivers/gpu/drm/nouveau/nvkm/device/acpi.c
index c948a0dc9e62..2bead7e879a5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/device/acpi.c
+++ b/drivers/gpu/drm/nouveau/nvkm/device/acpi.c
@@ -26,6 +26,343 @@
#include <core/device.h>
#include <subdev/clk.h>
+#include <linux/mxm-wmi.h>
+#include <linux/vga_switcheroo.h>
+
+#ifdef CONFIG_VGA_SWITCHEROO
+struct nouveau_dsm_priv nouveau_dsm_priv = {};
+
+static const guid_t nouveau_op_dsm_muid =
+ GUID_INIT(0xA486D8F8, 0x0BDA, 0x471B,
+ 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0);
+
+#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 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;
+}
+
+/* Must be called for Optimus models before the card can be turned off */
+void nvkm_acpi_switcheroo_set_powerdown(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);
+
+}
+
+/*
+ * 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 const guid_t nouveau_dsm_muid =
+ GUID_INIT(0x9D95A0A0, 0x0060, 0x4D48,
+ 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4);
+
+#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
+
+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_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
+ if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
+ (pdev->class != PCI_CLASS_DISPLAY_3D << 8))
+ continue;
+
+ 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
+nvkm_acpi_switcheroo_fini(void)
+{
+ if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected)
+ vga_switcheroo_unregister_handler();
+}
+
+void
+nvkm_acpi_switcheroo_init(void)
+{
+ bool r;
+
+ r = nouveau_dsm_detect();
+ if (!r)
+ return;
+
+ vga_switcheroo_register_handler(&nouveau_dsm_handler, 0);
+}
+#endif
+
#ifdef CONFIG_ACPI
static int
nvkm_acpi_ntfy(struct notifier_block *nb, unsigned long val, void *data)
@@ -38,7 +375,7 @@ nvkm_acpi_ntfy(struct notifier_block *nb, unsigned long val, void *data)
return NOTIFY_DONE;
}
-#endif
+#endif /* CONFIG_ACPI */
void
nvkm_acpi_fini(struct nvkm_device *device)
diff --git a/drivers/gpu/drm/nouveau/nvkm/device/acpi.h b/drivers/gpu/drm/nouveau/nvkm/device/acpi.h
index 1d3c5cf7c3b4..34854d10026d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/device/acpi.h
+++ b/drivers/gpu/drm/nouveau/nvkm/device/acpi.h
@@ -6,4 +6,23 @@ struct nvkm_device;
void nvkm_acpi_init(struct nvkm_device *);
void nvkm_acpi_fini(struct nvkm_device *);
+
+#ifdef CONFIG_VGA_SWITCHEROO
+extern struct nouveau_dsm_priv {
+ bool dsm_detected;
+ bool optimus_detected;
+ bool optimus_flags_detected;
+ bool optimus_skip_dsm;
+ acpi_handle dhandle;
+} nouveau_dsm_priv;
+
+void nvkm_acpi_switcheroo_init(void);
+void nvkm_acpi_switcheroo_fini(void);
+void nvkm_acpi_switcheroo_set_powerdown(void);
+#else
+static inline void nvkm_acpi_switcheroo_init(void) {};
+static inline void nvkm_acpi_switcheroo_fini(void) {};
+static inline void nvkm_acpi_switcheroo_set_powerdown(void) {};
+#endif
+
#endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/module.c b/drivers/gpu/drm/nouveau/nvkm/module.c
index 66d28465514b..cf71c68af89a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/module.c
+++ b/drivers/gpu/drm/nouveau/nvkm/module.c
@@ -20,14 +20,17 @@
* DEALINGS IN THE SOFTWARE.
*/
#include <core/module.h>
+#include <device/acpi.h>
void __exit
nvkm_exit(void)
{
+ nvkm_acpi_switcheroo_fini();
}
int __init
nvkm_init(void)
{
+ nvkm_acpi_switcheroo_init();
return 0;
}
--
2.44.0
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