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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/String.h>
#include <AK/Types.h>
#include <Kernel/Bus/PCI/Device.h>
#include <Kernel/Graphics/Definitions.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/VGACompatibleAdapter.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel {
namespace IntelGraphics {
enum RegisterIndex {
PipeAConf = 0x70008,
PipeBConf = 0x71008,
GMBusData = 0x510C,
GMBusStatus = 0x5108,
GMBusCommand = 0x5104,
GMBusClock = 0x5100,
DisplayPlaneAControl = 0x70180,
DisplayPlaneALinearOffset = 0x70184,
DisplayPlaneAStride = 0x70188,
DisplayPlaneASurface = 0x7019C,
DPLLDivisorA0 = 0x6040,
DPLLDivisorA1 = 0x6044,
DPLLControlA = 0x6014,
DPLLControlB = 0x6018,
DPLLMultiplierA = 0x601C,
HTotalA = 0x60000,
HBlankA = 0x60004,
HSyncA = 0x60008,
VTotalA = 0x6000C,
VBlankA = 0x60010,
VSyncA = 0x60014,
PipeASource = 0x6001C,
AnalogDisplayPort = 0x61100,
VGADisplayPlaneControl = 0x71400,
};
}
class IntelNativeGraphicsAdapter final
: public VGACompatibleAdapter {
AK_MAKE_ETERNAL
public:
struct PLLSettings {
bool is_valid() const { return (n != 0 && m1 != 0 && m2 != 0 && p1 != 0 && p2 != 0); }
u64 compute_dot_clock(u64 refclock) const
{
return (refclock * (5 * (m1) + (m2)) / (n)) / (p1 * p2);
}
u64 compute_vco(u64 refclock) const
{
return refclock * (5 * (m1) + (m2)) / n;
}
u64 compute_m() const
{
return 5 * (m1) + (m2);
}
u64 compute_p() const
{
return p1 * p2;
}
u64 n { 0 };
u64 m1 { 0 };
u64 m2 { 0 };
u64 p1 { 0 };
u64 p2 { 0 };
};
struct PLLParameterLimit {
size_t min, max;
};
struct PLLMaxSettings {
PLLParameterLimit dot_clock, vco, n, m, m1, m2, p, p1, p2;
};
private:
enum GMBusPinPair : u8 {
None = 0,
DedicatedControl = 1,
DedicatedAnalog = 0b10,
IntegratedDigital = 0b11,
sDVO = 0b101,
Dconnector = 0b111,
};
enum class GMBusStatus {
TransactionCompletion,
HardwareReady
};
enum GMBusCycle {
Wait = 1,
Stop = 4,
};
public:
static RefPtr<IntelNativeGraphicsAdapter> initialize(PCI::DeviceIdentifier const&);
private:
explicit IntelNativeGraphicsAdapter(PCI::Address);
void write_to_register(IntelGraphics::RegisterIndex, u32 value) const;
u32 read_from_register(IntelGraphics::RegisterIndex) const;
// ^GraphicsDevice
virtual void initialize_framebuffer_devices() override;
virtual Type type() const override { return Type::VGACompatible; }
bool pipe_a_enabled() const;
bool pipe_b_enabled() const;
bool is_resolution_valid(size_t width, size_t height);
bool set_crt_resolution(size_t width, size_t height);
void disable_output();
void enable_output(PhysicalAddress fb_address, size_t width);
void disable_vga_emulation();
void enable_vga_plane();
void disable_dac_output();
void enable_dac_output();
void disable_all_planes();
void disable_pipe_a();
void disable_pipe_b();
void disable_dpll();
void set_dpll_registers(const PLLSettings&);
void enable_dpll_without_vga(const PLLSettings&, size_t dac_multiplier);
void set_display_timings(const Graphics::Modesetting&);
void enable_pipe_a();
void set_framebuffer_parameters(size_t, size_t);
void enable_primary_plane(PhysicalAddress fb_address, size_t stride);
bool wait_for_enabled_pipe_a(size_t milliseconds_timeout) const;
bool wait_for_disabled_pipe_a(size_t milliseconds_timeout) const;
bool wait_for_disabled_pipe_b(size_t milliseconds_timeout) const;
void set_gmbus_default_rate();
void set_gmbus_pin_pair(GMBusPinPair pin_pair);
// FIXME: It would be better if we generalize the I2C access later on
void gmbus_read_edid();
void gmbus_write(unsigned address, u32 byte);
void gmbus_read(unsigned address, u8* buf, size_t length);
bool gmbus_wait_for(GMBusStatus desired_status, Optional<size_t> milliseconds_timeout);
Optional<PLLSettings> create_pll_settings(u64 target_frequency, u64 reference_clock, const PLLMaxSettings&);
Spinlock m_control_lock;
Spinlock m_modeset_lock;
mutable Spinlock m_registers_lock;
Graphics::VideoInfoBlock m_crt_edid;
const PhysicalAddress m_registers;
const PhysicalAddress m_framebuffer_addr;
OwnPtr<Memory::Region> m_registers_region;
};
}
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