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Kernel/Graphics: Introduce a new mechanism to initialize a PCI device

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Instead of using a clunky switch-case paradigm, we now have all drivers
being declaring two methods for their adapter class - create and probe.
These methods are linked in each PCIGraphicsDriverInitializer structure,
in a new s_initializers static list of them.
Then, when we probe for a PCI device, we use each probe method and if
there's a match, then the corresponding create method is called.

As a result of this change, it's much more easy to add more drivers and
the initialization code is more readable.
This commit is contained in:
Liav A 2022-12-17 21:15:31 +02:00 • committed by Andrew Kaster
parent 7625f7db73
commit 72b144e9e9
12 changed files with 85 additions and 71 deletions
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14
Kernel/Graphics/Intel/NativeDisplayConnector.cpp
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@ -175,20 +175,18 @@ Optional<IntelGraphics::PLLSettings> IntelNativeDisplayConnector::create_pll_set
return {};
}
NonnullLockRefPtr<IntelNativeDisplayConnector> IntelNativeDisplayConnector::must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, PhysicalAddress registers_region_address, size_t registers_region_length)
ErrorOr<NonnullLockRefPtr<IntelNativeDisplayConnector>> IntelNativeDisplayConnector::try_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, PhysicalAddress registers_region_address, size_t registers_region_length)
{
auto registers_region = MUST(MM.allocate_kernel_region(PhysicalAddress(registers_region_address), registers_region_length, "Intel Native Graphics Registers"sv, Memory::Region::Access::ReadWrite));
auto device_or_error = DeviceManagement::try_create_device<IntelNativeDisplayConnector>(framebuffer_address, framebuffer_resource_size, move(registers_region));
VERIFY(!device_or_error.is_error());
auto connector = device_or_error.release_value();
MUST(connector->initialize_gmbus_settings_and_read_edid());
auto registers_region = TRY(MM.allocate_kernel_region(PhysicalAddress(registers_region_address), registers_region_length, "Intel Native Graphics Registers"sv, Memory::Region::Access::ReadWrite));
auto connector = TRY(DeviceManagement::try_create_device<IntelNativeDisplayConnector>(framebuffer_address, framebuffer_resource_size, move(registers_region)));
TRY(connector->initialize_gmbus_settings_and_read_edid());
// Note: This is very important to set the resolution to something safe so we
// can create a framebuffer console with valid resolution.
{
SpinlockLocker control_lock(connector->m_control_lock);
MUST(connector->set_safe_mode_setting());
TRY(connector->set_safe_mode_setting());
}
MUST(connector->create_attached_framebuffer_console());
TRY(connector->create_attached_framebuffer_console());
return connector;
}