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https://github.com/RGBCube/serenity
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143a64f9a2
These instances were detected by searching for files that include Kernel/Debug.h, but don't match the regex: \\bdbgln_if\(|_DEBUG\\b This regex is pessimistic, so there might be more files that don't check for any real *_DEBUG macro. There seem to be no corner cases anyway. In theory, one might use LibCPP to detect things like this automatically, but let's do this one step after another.
86 lines
3 KiB
C++
86 lines
3 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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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Graphics/DisplayConnector/DeviceAttribute.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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StringView DisplayConnectorAttributeSysFSComponent::name() const
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{
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switch (m_type) {
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case Type::MutableModeSettingCapable:
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return "mutable_mode_setting_capable"sv;
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case Type::DoubleFrameBufferingCapable:
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return "double_framebuffering_capable"sv;
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case Type::FlushSupport:
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return "flush_support"sv;
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case Type::PartialFlushSupport:
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return "partial_flush_support"sv;
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case Type::RefreshRateSupport:
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return "refresh_rate_support"sv;
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case Type::EDID:
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return "edid"sv;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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NonnullLockRefPtr<DisplayConnectorAttributeSysFSComponent> DisplayConnectorAttributeSysFSComponent::must_create(DisplayConnectorSysFSDirectory const& device_directory, Type type)
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{
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return adopt_lock_ref(*new (nothrow) DisplayConnectorAttributeSysFSComponent(device_directory, type));
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}
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DisplayConnectorAttributeSysFSComponent::DisplayConnectorAttributeSysFSComponent(DisplayConnectorSysFSDirectory const& device_directory, Type type)
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: SysFSComponent()
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, m_device(device_directory.device({}))
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, m_type(type)
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{
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}
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ErrorOr<size_t> DisplayConnectorAttributeSysFSComponent::read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription*) const
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{
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auto blob = TRY(try_to_generate_buffer());
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if ((size_t)offset >= blob->size())
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return 0;
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ssize_t nread = min(static_cast<off_t>(blob->size() - offset), static_cast<off_t>(count));
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TRY(buffer.write(blob->data() + offset, nread));
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return nread;
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}
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ErrorOr<NonnullOwnPtr<KBuffer>> DisplayConnectorAttributeSysFSComponent::try_to_generate_buffer() const
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{
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OwnPtr<KString> value;
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switch (m_type) {
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case Type::MutableModeSettingCapable:
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value = TRY(KString::formatted("{:d}", m_device->mutable_mode_setting_capable()));
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break;
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case Type::DoubleFrameBufferingCapable:
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value = TRY(KString::formatted("{:d}", m_device->double_framebuffering_capable()));
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break;
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case Type::FlushSupport:
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value = TRY(KString::formatted("{:d}", m_device->flush_support()));
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break;
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case Type::PartialFlushSupport:
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value = TRY(KString::formatted("{:d}", m_device->partial_flush_support()));
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break;
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case Type::RefreshRateSupport:
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value = TRY(KString::formatted("{:d}", m_device->refresh_rate_support()));
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break;
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case Type::EDID: {
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auto edid_buffer = TRY(m_device->get_edid());
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return KBuffer::try_create_with_bytes("SysFS DisplayConnectorAttributeSysFSComponent EDID buffer"sv, edid_buffer.bytes());
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}
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default:
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VERIFY_NOT_REACHED();
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}
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return KBuffer::try_create_with_bytes("SysFS DisplayConnectorAttributeSysFSComponent buffer"sv, value->view().bytes());
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}
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}
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