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https://github.com/RGBCube/serenity
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9ee098b119
Like the HID, Audio and Storage subsystem, the Graphics subsystem (which
handles GPUs technically) exposes unix device files (typically in /dev).
To ensure consistency across the repository, move all related files to a
new directory under Kernel/Devices called "GPU".
Also remove the redundant "GPU" word from the VirtIO driver directory,
and the word "Graphics" from GraphicsManagement.{h,cpp} filenames.
53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/RefPtr.h>
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#include <AK/Try.h>
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#include <AK/Types.h>
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#include <Kernel/Locking/Spinlock.h>
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#include <Kernel/Memory/TypedMapping.h>
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namespace Kernel {
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struct [[gnu::packed]] GMBusRegisters {
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u32 clock;
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u32 command;
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u32 status;
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u32 data;
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};
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enum class GMBusStatus;
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class GMBusConnector {
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public:
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enum PinPair : u8 {
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None = 0,
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DedicatedControl = 1,
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DedicatedAnalog = 0b10,
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IntegratedDigital = 0b11,
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sDVO = 0b101,
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Dconnector = 0b111,
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};
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public:
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static ErrorOr<NonnullOwnPtr<GMBusConnector>> create_with_physical_address(PhysicalAddress gmbus_start_address);
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ErrorOr<void> write(unsigned address, u32 data);
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ErrorOr<void> read(unsigned address, u8* buf, size_t length);
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void set_default_rate();
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private:
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void set_pin_pair(PinPair pin_pair);
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bool wait_for(GMBusStatus desired_status, size_t milliseconds_timeout);
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explicit GMBusConnector(Memory::TypedMapping<GMBusRegisters volatile>);
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Spinlock<LockRank::None> m_access_lock;
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Memory::TypedMapping<GMBusRegisters volatile> m_gmbus_registers;
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};
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}
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