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Kernel: Enable Write-Combine for FramebufferDevice

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This enables much faster writing to the userspace mapped framebuffer,
if supported by the hardware.
This commit is contained in:
Tom 2022-01-25 17:42:45 -07:00 committed by Idan Horowitz
parent 6e46e21c42
commit 4383b26faa
Notes: sideshowbarker 2024-07-17 20:11:51 +09:00 
Author: https://github.com/tomuta
Commit: https://github.com/SerenityOS/serenity/commit/4383b26faaf
Pull-request: https://github.com/SerenityOS/serenity/pull/12140
Reviewed-by: https://github.com/IdanHo ✅
1 changed files with 2 additions and 0 deletions
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2
Kernel/Graphics/FramebufferDevice.cpp
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@ -59,6 +59,8 @@ ErrorOr<Memory::Region*> FramebufferDevice::mmap(Process& process, OpenFileDescr
"Framebuffer",
prot,
shared));
if (auto result = m_userspace_framebuffer_region->set_write_combine(true); result.is_error())
dbgln("FramebufferDevice: Failed to enable Write-Combine on Framebuffer: {}", result.error());
return m_userspace_framebuffer_region;
}