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Read EDID information from screen (if possible) in HwGetVideoChildDescriptor.
Still doesn't do anything useful with it, but that's a start ;) svn path=/trunk/; revision=22237
This commit is contained in:
Hervé Poussineau
parent
56f9a0a548
commit
2a685bbbfe
4 changed files with 290 additions and 1 deletions
251
reactos/drivers/video/miniport/vbe/edid.c
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251
reactos/drivers/video/miniport/vbe/edid.c
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@ -0,0 +1,251 @@
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/*
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* ReactOS VBE EDID management
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*
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* Copyright (C) 2006 Hervé Poussineau
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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/* INCLUDES *******************************************************************/
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#include "vbemp.h"
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/* PUBLIC AND PRIVATE FUNCTIONS ***********************************************/
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static VOID NTAPI
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VBEWriteClockLine(
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PVOID HwDeviceExtension,
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UCHAR data)
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{
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INT10_BIOS_ARGUMENTS BiosRegisters;
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PVBE_DEVICE_EXTENSION VBEDeviceExtension =
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(PVBE_DEVICE_EXTENSION)HwDeviceExtension;
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_WRITE_SCL_CLOCK_LINE;
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BiosRegisters.Ecx = data;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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}
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static VOID NTAPI
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VBEWriteDataLine(
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PVOID HwDeviceExtension,
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UCHAR data)
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{
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INT10_BIOS_ARGUMENTS BiosRegisters;
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PVBE_DEVICE_EXTENSION VBEDeviceExtension =
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(PVBE_DEVICE_EXTENSION)HwDeviceExtension;
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_WRITE_SDA_DATA_LINE;
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BiosRegisters.Ecx = data;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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}
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static BOOLEAN NTAPI
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VBEReadClockLine(
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PVOID HwDeviceExtension)
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{
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INT10_BIOS_ARGUMENTS BiosRegisters;
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PVBE_DEVICE_EXTENSION VBEDeviceExtension =
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(PVBE_DEVICE_EXTENSION)HwDeviceExtension;
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_READ_SCL_CLOCK_LINE;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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return BiosRegisters.Edx;
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}
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static BOOLEAN NTAPI
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VBEReadDataLine(
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PVOID HwDeviceExtension)
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{
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INT10_BIOS_ARGUMENTS BiosRegisters;
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PVBE_DEVICE_EXTENSION VBEDeviceExtension =
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(PVBE_DEVICE_EXTENSION)HwDeviceExtension;
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_READ_SDA_DATA_LINE;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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return BiosRegisters.Edx;
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}
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static BOOLEAN
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VBEReadEdidUsingSCI(
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PVOID HwDeviceExtension,
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PVBE_EDID Edid)
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{
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INT10_BIOS_ARGUMENTS BiosRegisters;
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PVBE_DEVICE_EXTENSION VBEDeviceExtension =
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(PVBE_DEVICE_EXTENSION)HwDeviceExtension;
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DDC_CONTROL DDCControl;
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BOOLEAN ret;
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VideoPortDebugPrint(Trace, "VBEMP: VBEReadEdidUsingSCI() called\n");
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/*
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* Check if graphic card support I²C interface
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*/
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_REPORT_CAPABILITIES;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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if (BiosRegisters.Eax != VBE_SUCCESS)
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return FALSE;
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VideoPortDebugPrint(Info, "VBEMP: VBE/SCI version %x\n", BiosRegisters.Ecx);
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if ((BiosRegisters.Ebx & 0xF) != 0xF)
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return FALSE;
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/*
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* Enable I²C interface
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*/
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_BEGIN_SCL_SDA_CONTROL;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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if (BiosRegisters.Eax != VBE_SUCCESS)
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return FALSE;
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/*
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* Read EDID information
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*/
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DDCControl.Size = sizeof(DDC_CONTROL);
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DDCControl.I2CCallbacks.WriteClockLine = VBEWriteClockLine;
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DDCControl.I2CCallbacks.WriteDataLine = VBEWriteDataLine;
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DDCControl.I2CCallbacks.ReadClockLine = VBEReadClockLine;
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DDCControl.I2CCallbacks.ReadDataLine = VBEReadDataLine;
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DDCControl.EdidSegment = 0;
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ret = VideoPortDDCMonitorHelper(
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HwDeviceExtension,
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&DDCControl,
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(PUCHAR)&Edid,
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sizeof(VBE_EDID));
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/*
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* Disable I²C interface
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*/
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_END_SCL_SDA_CONTROL;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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/* Ignore the possible error, as we did our best to prevent problems */
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return ret;
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}
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static BOOLEAN
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VBEReadEdid(
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PVBE_DEVICE_EXTENSION VBEDeviceExtension,
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PVBE_EDID Edid)
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{
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INT10_BIOS_ARGUMENTS BiosRegisters;
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VideoPortDebugPrint(Trace, "VBEMP: VBEReadEdid() called\n");
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/*
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* Directly read EDID information
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*/
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VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
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BiosRegisters.Eax = VBE_DDC;
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BiosRegisters.Ebx = VBE_DDC_READ_EDID;
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BiosRegisters.Edx = 1;
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BiosRegisters.Edi = VBEDeviceExtension->TrampolineMemoryOffset;
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BiosRegisters.SegEs = VBEDeviceExtension->TrampolineMemorySegment;
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VBEDeviceExtension->Int10Interface.Int10CallBios(
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VBEDeviceExtension->Int10Interface.Context,
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&BiosRegisters);
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if (BiosRegisters.Eax != VBE_SUCCESS)
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return FALSE;
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/*
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* Copy the EDID information to our buffer
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*/
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VBEDeviceExtension->Int10Interface.Int10ReadMemory(
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VBEDeviceExtension->Int10Interface.Context,
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VBEDeviceExtension->TrampolineMemorySegment,
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VBEDeviceExtension->TrampolineMemoryOffset,
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Edid,
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sizeof(VBE_EDID));
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return TRUE;
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}
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VP_STATUS NTAPI
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VBEGetVideoChildDescriptor(
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IN PVOID HwDeviceExtension,
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IN PVIDEO_CHILD_ENUM_INFO ChildEnumInfo,
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OUT PVIDEO_CHILD_TYPE VideoChildType,
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OUT PUCHAR pChildDescriptor,
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OUT PULONG UId,
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OUT PULONG pUnused)
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{
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PVBE_DEVICE_EXTENSION VBEDeviceExtension =
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(PVBE_DEVICE_EXTENSION)HwDeviceExtension;
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VBE_EDID Edid;
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/*
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* We are called very early in device initialization, even before
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* VBEInitialize is called. So, our Int10 interface is not set.
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* Ignore this call, we will trigger it ourselves later.
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*/
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if (VBEDeviceExtension->Int10Interface.Size == 0)
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return VIDEO_ENUM_NO_MORE_DEVICES;
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/*
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* Try to read EDID information using 2 different methods.
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*/
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if (VBEReadEdid(HwDeviceExtension, &Edid))
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{
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VideoPortDebugPrint(Info, "VBEMP: EDID information read directly\n");
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}
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else if (VBEReadEdidUsingSCI(HwDeviceExtension, &Edid))
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{
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VideoPortDebugPrint(Info, "VBEMP: EDID information read using I²C\n");
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}
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else
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{
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VideoPortDebugPrint(Warn, "VBEMP: Unable to read EDID information\n");
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return VIDEO_ENUM_NO_MORE_DEVICES;
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}
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/*
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* Process the EDID data.
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*/
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/* FIXME */
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VideoPortDebugPrint(Error, "VBEMP: Need to parse EDID information\n");
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return VIDEO_ENUM_NO_MORE_DEVICES;
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}
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@ -44,6 +44,7 @@ DriverEntry(IN PVOID Context1, IN PVOID Context2)
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InitData.HwResetHw = VBEResetHw;
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InitData.HwGetPowerState = VBEGetPowerState;
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InitData.HwSetPowerState = VBESetPowerState;
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InitData.HwGetVideoChildDescriptor = VBEGetVideoChildDescriptor;
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InitData.HwDeviceExtensionSize = sizeof(VBE_DEVICE_EXTENSION);
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return VideoPortInitialize(Context1, Context2, &InitData, NULL);
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@ -377,7 +378,7 @@ VBEInitialize(PVOID HwDeviceExtension)
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VBESortModes(VBEDeviceExtension);
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/*
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* Print the supported video modes when NDEBUG is not set.
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* Print the supported video modes.
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*/
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for (CurrentMode = 0;
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@ -390,6 +391,11 @@ VBEInitialize(PVOID HwDeviceExtension)
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VBEDeviceExtension->ModeInfo[CurrentMode].BitsPerPixel);
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}
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/*
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* Enumerate our children.
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*/
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VideoPortEnumerateChildren(HwDeviceExtension, NULL);
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return TRUE;
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}
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@ -71,6 +71,20 @@
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#define VBE_AUDIO_INTERFACE_EXTENSIONS 0x4F12
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#define VBE_OEM_EXTENSIONS 0x4F13
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#define VBE_DISPLAY_DATA_CHANNEL 0x4F14
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#define VBE_DDC 0x4F15
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/*
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* VBE DDC Sub-Functions
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*/
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#define VBE_DDC_READ_EDID 0x01
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#define VBE_DDC_REPORT_CAPABILITIES 0x10
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#define VBE_DDC_BEGIN_SCL_SDA_CONTROL 0x11
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#define VBE_DDC_END_SCL_SDA_CONTROL 0x12
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#define VBE_DDC_WRITE_SCL_CLOCK_LINE 0x13
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#define VBE_DDC_WRITE_SDA_DATA_LINE 0x14
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#define VBE_DDC_READ_SCL_CLOCK_LINE 0x15
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#define VBE_DDC_READ_SDA_DATA_LINE 0x16
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/*
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* VBE Video Mode Information Definitions
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@ -175,6 +189,11 @@ typedef struct
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CHAR Reserved4[189];
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} VBE_MODEINFO, *PVBE_MODEINFO;
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typedef struct
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{
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UCHAR Reserved[128];
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} VBE_EDID, *PVBE_EDID;
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#include <poppack.h>
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typedef struct
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@ -196,6 +215,18 @@ typedef struct
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USHORT CurrentMode;
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} VBE_DEVICE_EXTENSION, *PVBE_DEVICE_EXTENSION;
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/* edid.c */
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VP_STATUS NTAPI
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VBEGetVideoChildDescriptor(
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IN PVOID HwDeviceExtension,
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IN PVIDEO_CHILD_ENUM_INFO ChildEnumInfo,
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OUT PVIDEO_CHILD_TYPE VideoChildType,
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OUT PUCHAR pChildDescriptor,
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OUT PULONG UId,
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OUT PULONG pUnused);
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/* vbemp.c */
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VP_STATUS STDCALL
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VBEFindAdapter(
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IN PVOID HwDeviceExtension,
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@ -2,6 +2,7 @@
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<include base="vbemp">.</include>
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<define name="__USE_W32API" />
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<library>videoprt</library>
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<file>edid.c</file>
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<file>vbemp.c</file>
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<file>vbemp.rc</file>
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</module>
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