CloverBootloader/rEFIt_UEFI/Platform/Edid.cpp

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//Slice 2013
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#include <Platform.h> // Only use angled for Platform, else, xcode project won't compile
#include "Settings.h"
#include "AcpiPatcher.h"
#ifndef DEBUG_ALL
#define DEBUG_EDID 1
#else
#define DEBUG_EDID DEBUG_ALL
#endif
#if DEBUG_EDID == 0
#define DBG(...)
#else
#define DBG(...) DebugLog(DEBUG_EDID, __VA_ARGS__)
#endif
EFI_STATUS EFIAPI GetEdidImpl(
IN EFI_EDID_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE *ChildHandle,
OUT UINT32 *Attributes,
IN OUT UINTN *EdidSize,
IN OUT UINT8 **Edid
)
{
*Edid = gSettings.Graphics.EDID.CustomEDID.data();
*EdidSize = 128;
*Attributes = 0;
if (*Edid) {
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
EFI_EDID_OVERRIDE_PROTOCOL gEdidOverride =
{
GetEdidImpl
};
EFI_STATUS
InitializeEdidOverride ()
{
EFI_STATUS Status;
Status = gBS->InstallMultipleProtocolInterfaces (
&gImageHandle,
&gEfiEdidOverrideProtocolGuid,
&gEdidOverride,
NULL
);
if (EFI_ERROR(Status)) {
DBG("Can't install EdidOverride on ImageHandle\n");
}
return Status;
}
//used only if VBiosPatchNeeded and if no CustomEDID
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UINT8* getCurrentEdid (void)
{
EFI_STATUS Status;
EFI_EDID_ACTIVE_PROTOCOL *EdidProtocol;
UINT8 *Edid;
DBG("EdidActive:");
Edid = NULL;
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Status = gBS->LocateProtocol(gEfiEdidActiveProtocolGuid, NULL, (void**)&EdidProtocol);
if (!EFI_ERROR(Status)) {
DBG(" size=%d", EdidProtocol->SizeOfEdid);
if (EdidProtocol->SizeOfEdid > 0) {
Edid = (__typeof__(Edid))AllocateCopyPool(EdidProtocol->SizeOfEdid, EdidProtocol->Edid);
}
}
DBG(" %s\n", Edid != NULL ? "found" : "not found");
return Edid;
}
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void DebugDumpEDID(CONST CHAR8 *Message, INTN N)
{
INTN i,j;
// Don't dump in the case of debug logging because of too slow output
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if (gSettings.Boot.DebugLog) {
return;
}
DBG("%s size:%lld\n", Message, N);
for (i=0; i<N; i+=10) {
DBG("%03lld |", i);
for (j=0; j<10; j++) {
if (i+j > N-1) break;
DBG(" %02hhX", gSettings.Graphics.EDID.CustomEDID[i+j]);
}
DBG("\n");
}
}
//Used at OS start
// if EFI_SUCCESS then result in gSettings.Graphics.EDID.CustomEDID != NULL
// first priority is CustomEDID
// second is UEFI EDID from EdidDiscoveredProtocol
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EFI_STATUS GetEdidDiscovered(void)
{
EFI_STATUS Status = EFI_SUCCESS;
UINTN N = 0;
UINT8 NewChecksum;
//gEDID = NULL;
if (gSettings.Graphics.EDID.CustomEDID.notEmpty()) {
N = gSettings.Graphics.EDID.CustomEDID.size();
DebugDumpEDID("--- Custom EDID Table", N);
} else {
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Status = gBS->LocateProtocol(gEfiEdidDiscoveredProtocolGuid, NULL, (void **)&EdidDiscovered);
if (!EFI_ERROR(Status)) { //discovered
N = EdidDiscovered->SizeOfEdid;
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if (!gSettings.Boot.DebugLog) {
DBG("EdidDiscovered size=%llu\n", N);
}
if (N == 0) {
return EFI_NOT_FOUND;
}
// gSettings.Graphics.EDID.CustomEDID = (__typeof__(gSettings.Graphics.EDID.CustomEDID))AllocateAlignedPages(EFI_SIZE_TO_PAGES(N), 128);
gSettings.Graphics.EDID.CustomEDID.ncpy(EdidDiscovered->Edid, N);
DebugDumpEDID("--- Discovered EDID Table", N);
}
}
if (gSettings.Graphics.EDID.CustomEDID.notEmpty()) {
// begin patching result
if (gSettings.Graphics.EDID.VendorEDID) {
DBG(" VendorID = 0x%04hx changed to 0x%04hx\n", ((UINT16*)gSettings.Graphics.EDID.CustomEDID.data())[4], gSettings.Graphics.EDID.VendorEDID);
((UINT16*)gSettings.Graphics.EDID.CustomEDID.data())[4] = gSettings.Graphics.EDID.VendorEDID;
}
if (gSettings.Graphics.EDID.ProductEDID) {
DBG(" ProductID = 0x%04hx changed to 0x%04hx\n", ((UINT16*)gSettings.Graphics.EDID.CustomEDID.data())[5], gSettings.Graphics.EDID.ProductEDID);
((UINT16*)gSettings.Graphics.EDID.CustomEDID.data())[5] = gSettings.Graphics.EDID.ProductEDID;
}
if (gSettings.Graphics.EDID.EdidFixHorizontalSyncPulseWidth) {
DBG(" HorizontalSyncPulseWidth = 0x%02hhx changed to 0x%02hx\n", ((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[63], gSettings.Graphics.EDID.EdidFixHorizontalSyncPulseWidth);
UINT8 LsBits, MsBits;
LsBits = gSettings.Graphics.EDID.EdidFixHorizontalSyncPulseWidth & 0xff;
MsBits = (gSettings.Graphics.EDID.EdidFixHorizontalSyncPulseWidth >> 8) & 0x03;
((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[63] = LsBits;
LsBits = ((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[65] & ~0x30;
((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[65] = LsBits | (MsBits << 4);
}
if (gSettings.Graphics.EDID.EdidFixVideoInputSignal) {
DBG(" VideoInputSignal = 0x%02hhx changed to 0x%02hhx\n", ((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[20], gSettings.Graphics.EDID.EdidFixVideoInputSignal);
((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[20] = gSettings.Graphics.EDID.EdidFixVideoInputSignal;
}
NewChecksum = (UINT8)(256 - Checksum8(gSettings.Graphics.EDID.CustomEDID.data(), 127));
if ((gSettings.Graphics.EDID.VendorEDID) || (gSettings.Graphics.EDID.ProductEDID) || (gSettings.Graphics.EDID.EdidFixHorizontalSyncPulseWidth) || (gSettings.Graphics.EDID.EdidFixVideoInputSignal)) {
((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[127] = NewChecksum;
DebugDumpEDID("--- Patched EDID Table", N);
} else if (((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[127] != NewChecksum) {
DBG(" Fix wrong checksum = 0x%02hhx changed to ", ((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[127]);
((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[127] = NewChecksum;
DBG("0x%02hhx\n", ((UINT8*)gSettings.Graphics.EDID.CustomEDID.data())[127]);
DebugDumpEDID("--- Patched EDID Table", N);
}
}
return Status;
}