2019-05-19 15:07:45 +03:00
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# SPDX-License-Identifier: GPL-2.0-only
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2009-08-11 09:52:06 +04:00
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config VGA_ARB
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2011-01-21 01:44:16 +03:00
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bool "VGA Arbitration" if EXPERT
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2009-08-11 09:52:06 +04:00
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default y
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2012-11-29 17:40:40 +04:00
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depends on (PCI && !S390)
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2009-08-11 09:52:06 +04:00
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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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2018-05-08 21:14:57 +03:00
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see Documentation/gpu/vgaarbiter.rst for more details. Select this to
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2009-08-11 09:52:06 +04:00
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enable VGA arbiter.
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2010-02-03 04:45:01 +03:00
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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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2010-03-04 18:49:37 +03:00
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2010-02-01 08:38:10 +03:00
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config VGA_SWITCHEROO
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2010-05-17 21:54:04 +04:00
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bool "Laptop Hybrid Graphics - GPU switching support"
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2010-02-01 08:38:10 +03:00
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depends on X86
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depends on ACPI
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2019-01-05 13:05:58 +03:00
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depends on PCI
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2019-06-24 12:21:53 +03:00
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depends on (FRAMEBUFFER_CONSOLE=n || FB=y)
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2012-04-16 22:01:17 +04:00
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select VGA_ARB
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2010-02-01 08:38:10 +03:00
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help
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2010-05-17 21:54:04 +04:00
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Many laptops released in 2008/9/10 have two GPUs with a multiplexer
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2010-02-01 08:38:10 +03:00
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to switch between them. This adds support for dynamic switching when
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2019-11-20 16:33:27 +03:00
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X isn't running and delayed switching until the next logoff. This
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2010-05-17 21:54:04 +04:00
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feature is called hybrid graphics, ATI PowerXpress, and Nvidia
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2010-02-01 08:38:10 +03:00
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HybridPower.
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