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Subject[PATCH 11/15] nouveau: Make vga_switcheroo code depend on VGA_SWITCHEROO
From: Jeff Mahoney <>

Commit 8116188fdef5946bcbb2d73e41d7412a57ffb034 (nouveau/acpi: hook up
to the MXM method for mux switching.) broke the build on non-x86
architectures due to the new dependency on MXM and MXM being an x86
platform driver.

It built previously since the vga switcheroo registration routines
were zereod out on !X86. The code was built in but unused.

This patch makes all of the DSM code depend on CONFIG_VGA_SWITCHEROO,
allowing it to build on non-x86 and shrinking the module size as well.

Signed-off-by: Jeff Mahoney <>
Signed-off-by: Jiri Slaby <>
Cc: David Airlie <>
drivers/gpu/drm/nouveau/nouveau_acpi.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index d97f200..4d70fb7 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -46,6 +46,7 @@ bool nouveau_is_v1_dsm(void) {

static const char nouveau_dsm_muid[] = {
0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
@@ -337,6 +338,10 @@ void nouveau_unregister_dsm_handler(void)
if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected)
+void nouveau_register_dsm_handler(void) {}
+void nouveau_unregister_dsm_handler(void) {}

/* retrieve the ROM in 4k blocks */
static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,

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