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Tip revision: 0ecfebd2b52404ae0c54a878c872bb93363ada36 authored by Linus Torvalds on 07 July 2019, 22:41:56 UTC
Linux 5.2
Linux 5.2
Tip revision: 0ecfebd
Kconfig
# SPDX-License-Identifier: GPL-2.0-only
config VGA_ARB
bool "VGA Arbitration" if EXPERT
default y
depends on (PCI && !S390)
help
Some "legacy" VGA devices implemented on PCI typically have the same
hard-decoded addresses as they did on ISA. When multiple PCI devices
are accessed at same time they need some kind of coordination. Please
see Documentation/gpu/vgaarbiter.rst for more details. Select this to
enable VGA arbiter.
config VGA_ARB_MAX_GPUS
int "Maximum number of GPUs"
default 16
depends on VGA_ARB
help
Reserves space in the kernel to maintain resource locking for
multiple GPUS. The overhead for each GPU is very small.
config VGA_SWITCHEROO
bool "Laptop Hybrid Graphics - GPU switching support"
depends on X86
depends on ACPI
depends on PCI
select VGA_ARB
help
Many laptops released in 2008/9/10 have two GPUs with a multiplexer
to switch between them. This adds support for dynamic switching when
X isn't running and delayed switching until the next logoff. This
feature is called hybrid graphics, ATI PowerXpress, and Nvidia
HybridPower.