[PATCH 3/5] nouveau: Add interface to detect optimus support

[Dave Airlie <airlied@gmail.com>]

From: Dave Airlie <airlied@redhat.com>

This is required for later patches.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/nouveau/nouveau_acpi.c | 4 ++++
 drivers/gpu/drm/nouveau/nouveau_acpi.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index e7369c8..b92833e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -35,6 +35,10 @@ static struct nouveau_dsm_priv {
 	acpi_handle rom_handle;
 } nouveau_dsm_priv;
 
+bool nouveau_is_optimus(void) {
+	return nouveau_dsm_priv.optimus_detected;
+}
+
 #define NOUVEAU_DSM_HAS_MUX 0x1
 #define NOUVEAU_DSM_HAS_OPT 0x2
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.h b/drivers/gpu/drm/nouveau/nouveau_acpi.h
index 08af677..c70b4d1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.h
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.h
@@ -4,6 +4,7 @@
 #define ROM_BIOS_PAGE 4096
 
 #if defined(CONFIG_ACPI)
+bool nouveau_is_optimus(void);
 void nouveau_register_dsm_handler(void);
 void nouveau_unregister_dsm_handler(void);
 void nouveau_switcheroo_optimus_dsm(void);
@@ -11,6 +12,7 @@ int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len);
 bool nouveau_acpi_rom_supported(struct pci_dev *pdev);
 void *nouveau_acpi_edid(struct drm_device *, struct drm_connector *);
 #else
+static inline bool nouveau_is_optimus(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) {}
-- 
1.7.12