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Kernel: Add support for multiple VirtIO GPU outputs

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This creates /dev/fbX devices for each physical output, owned by the
parent VirtIOGPU instance. This allows mapping and setting resolutions
independently for each output.
This commit is contained in:
Tom 2021-06-25 20:44:48 -06:00 • committed by Andreas Kling
parent 708f27ca0e
commit 8749235046
8 changed files with 305 additions and 194 deletions
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31
Kernel/Graphics/VirtIOGPU/VirtIOGraphicsAdapter.cpp
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@ -20,35 +20,38 @@ VirtIOGraphicsAdapter::VirtIOGraphicsAdapter(PCI::Address base_address)
: GraphicsDevice(base_address)
{
m_gpu_device = adopt_ref(*new VirtIOGPU(base_address)).leak_ref();
m_framebuffer_console = Kernel::Graphics::VirtIOGPUConsole::initialize(m_gpu_device);
// FIXME: This is a very wrong way to do this...
GraphicsManagement::the().m_console = m_framebuffer_console;
}
void VirtIOGraphicsAdapter::initialize_framebuffer_devices()
{
dbgln_if(VIRTIO_DEBUG, "VirtIOGPU: Initializing framebuffer devices");
VERIFY(m_framebuffer_device.is_null());
m_framebuffer_device = adopt_ref(*new VirtIOFrameBufferDevice(m_gpu_device)).leak_ref();
VERIFY(!m_created_framebuffer_devices);
m_gpu_device->create_framebuffer_devices();
m_created_framebuffer_devices = true;
// FIXME: This is a very wrong way to do this...
GraphicsManagement::the().m_console = m_gpu_device->default_console();
}
void VirtIOGraphicsAdapter::enable_consoles()
{
dbgln_if(VIRTIO_DEBUG, "VirtIOGPU: Enabling consoles");
VERIFY(m_framebuffer_console);
if (m_framebuffer_device)
m_framebuffer_device->deactivate_writes();
m_gpu_device->clear_to_black();
m_framebuffer_console->enable();
m_gpu_device->for_each_framebuffer([&](auto& framebuffer, auto& console) {
framebuffer.deactivate_writes();
framebuffer.clear_to_black();
console.enable();
return IterationDecision::Continue;
});
}
void VirtIOGraphicsAdapter::disable_consoles()
{
dbgln_if(VIRTIO_DEBUG, "VirtIOGPU: Disabling consoles");
VERIFY(m_framebuffer_device);
VERIFY(m_framebuffer_console);
m_framebuffer_console->disable();
m_framebuffer_device->activate_writes();
m_gpu_device->for_each_framebuffer([&](auto& framebuffer, auto& console) {
console.disable();
framebuffer.activate_writes();
return IterationDecision::Continue;
});
}
}