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