1config VGA_ARB
 2	bool "VGA Arbitration" if EXPERT
 3	default y
 4	depends on (PCI && !S390)
 5	help
 6	  Some "legacy" VGA devices implemented on PCI typically have the same
 7	  hard-decoded addresses as they did on ISA. When multiple PCI devices
 8	  are accessed at same time they need some kind of coordination. Please
 9	  see Documentation/vgaarbiter.txt for more details. Select this to
10	  enable VGA arbiter.
11
12config VGA_ARB_MAX_GPUS
13	int "Maximum number of GPUs"
14	default 16
15	depends on VGA_ARB
16	help
17	  Reserves space in the kernel to maintain resource locking for
18	  multiple GPUS.  The overhead for each GPU is very small.
19
20config VGA_SWITCHEROO
21	bool "Laptop Hybrid Graphics - GPU switching support"
22	depends on X86
23	depends on ACPI
 
 
24	select VGA_ARB
25	help
26	  Many laptops released in 2008/9/10 have two GPUs with a multiplexer
27	  to switch between them. This adds support for dynamic switching when
28          X isn't running and delayed switching until the next logoff. This
29	  feature is called hybrid graphics, ATI PowerXpress, and Nvidia
30	  HybridPower.

 1# SPDX-License-Identifier: GPL-2.0-only
 2config VGA_ARB
 3	bool "VGA Arbitration" if EXPERT
 4	default y
 5	depends on (PCI && !S390)
 6	help
 7	  Some "legacy" VGA devices implemented on PCI typically have the same
 8	  hard-decoded addresses as they did on ISA. When multiple PCI devices
 9	  are accessed at same time they need some kind of coordination. Please
10	  see Documentation/gpu/vgaarbiter.rst for more details. Select this to
11	  enable VGA arbiter.
12
13config VGA_ARB_MAX_GPUS
14	int "Maximum number of GPUs"
15	default 16
16	depends on VGA_ARB
17	help
18	  Reserves space in the kernel to maintain resource locking for
19	  multiple GPUS.  The overhead for each GPU is very small.
20
21config VGA_SWITCHEROO
22	bool "Laptop Hybrid Graphics - GPU switching support"
23	depends on X86
24	depends on ACPI
25	depends on PCI
26	depends on (FRAMEBUFFER_CONSOLE=n || FB=y)
27	select VGA_ARB
28	help
29	  Many laptops released in 2008/9/10 have two GPUs with a multiplexer
30	  to switch between them. This adds support for dynamic switching when
31	  X isn't running and delayed switching until the next logoff. This
32	  feature is called hybrid graphics, ATI PowerXpress, and Nvidia
33	  HybridPower.