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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.
60 lines
2 KiB
C++
60 lines
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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#include <Kernel/Devices/GPU/Intel/Plane/G33DisplayPlane.h>
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#include <Kernel/Memory/PhysicalAddress.h>
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namespace Kernel {
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ErrorOr<NonnullOwnPtr<IntelG33DisplayPlane>> IntelG33DisplayPlane::create_with_physical_address(PhysicalAddress plane_registers_start_address)
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{
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auto registers_mapping = TRY(Memory::map_typed<PlaneRegisters volatile>(plane_registers_start_address, sizeof(PlaneRegisters), Memory::Region::Access::ReadWrite));
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return adopt_nonnull_own_or_enomem(new (nothrow) IntelG33DisplayPlane(move(registers_mapping)));
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}
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IntelG33DisplayPlane::IntelG33DisplayPlane(Memory::TypedMapping<PlaneRegisters volatile> registers_mapping)
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: IntelDisplayPlane(move(registers_mapping))
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{
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}
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ErrorOr<void> IntelG33DisplayPlane::enable(Badge<IntelDisplayConnectorGroup>)
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{
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SpinlockLocker locker(m_access_lock);
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VERIFY(((m_horizontal_active_pixels_count * 4) % 64 == 0));
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VERIFY(((m_horizontal_stride) % 64 == 0));
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u32 control_value = 0;
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switch (m_pipe_select) {
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case PipeSelect::PipeA:
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control_value |= (0b00 << 24);
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break;
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case PipeSelect::PipeB:
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control_value |= (0b01 << 24);
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break;
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case PipeSelect::PipeC:
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control_value |= (0b10 << 24);
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break;
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case PipeSelect::PipeD:
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control_value |= (0b11 << 24);
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break;
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}
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// Note: Set the plane to work with 32 bit BGRX (Ignore Alpha channel).
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// Note: Bit 31 is set to turn on the plane.
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control_value |= (0b0110 << 26) | (1 << 31);
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m_plane_registers->stride = m_horizontal_stride;
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m_shadow_registers.stride = m_horizontal_stride;
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m_plane_registers->linear_offset = 0;
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m_shadow_registers.linear_offset = 0;
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m_plane_registers->surface_base = m_aperture_start.get();
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m_shadow_registers.surface_base = m_aperture_start.get();
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m_plane_registers->control = control_value;
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m_shadow_registers.control = control_value;
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return {};
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}
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}
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