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1d38fe6ee6
The VGA arbiter is really PCI-specific and doesn't depend on any GPU things. Move it to the PCI subsystem. Note that misc_init() must be called before vga_arb_device_init(). These are both subsys_initcalls, so this ordering depends on the link order, which is determined by drivers/Makefile: obj-y += pci/ obj-y += char/ <-- misc_init() obj-y += gpu/ <-- vga_arb_device_init() (before this commit) The drivers/pci/ subsys_initcalls are called *before* misc_init(), so convert vga_arb_device_init() to subsys_initcall_sync(), which is called after *all* subsys_initcalls. Link: https://lore.kernel.org/r/20220224224753.297579-2-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
14 lines
526 B
Text
14 lines
526 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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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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