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intel_extreme:dualhead clone mode with displayport works on Sandy/Ivy Bridge.

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This commit is contained in:
Rudolf Cornelissen 2021-07-01 00:05:49 +00:00
parent b3bafaf695
commit 09ffd17aab
2 changed files with 51 additions and 0 deletions
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49
src/add-ons/accelerants/intel_extreme/Ports.cpp
View File

@ -227,6 +227,7 @@ Port::GetPLLLimits(pll_limits& limits)
pipe_index
Port::PipePreference()
{
CALLED();
// Ideally we could just return INTEL_PIPE_ANY for all devices by default, but
// this doesn't quite work yet. We need to use the BIOS presetup pipes for now.
if (gInfo->shared_info->device_type.Generation() < 4)
@ -418,6 +419,7 @@ LVDSPort::LVDSPort()
pipe_index
LVDSPort::PipePreference()
{
CALLED();
// Older devices have hardcoded pipe/port mappings, so just use that
if (gInfo->shared_info->device_type.Generation() < 4)
return INTEL_PIPE_B;
@ -902,6 +904,53 @@ DisplayPort::DisplayPort(port_index index, const char* baseName)
}
pipe_index
DisplayPort::PipePreference()
{
CALLED();
if (gInfo->shared_info->device_type.Generation() <= 4)
return INTEL_PIPE_ANY;
// Notes:
// - The BIOSes seen sofar do not use PIPE C by default.
// - Looks like BIOS selected Transcoder (A,B,C) is not always same as selected Pipe (A,B,C)
// so these should probably be handled seperately. For now this is OK as we don't touch
// the pipe for DisplayPort, only the transcoder..
uint32 TranscoderPort = INTEL_TRANS_DP_PORT_NONE;
switch (PortIndex()) {
case INTEL_PORT_A:
return INTEL_PIPE_ANY;
case INTEL_PORT_B:
TranscoderPort = INTEL_TRANS_DP_PORT_B;
break;
case INTEL_PORT_C:
TranscoderPort = INTEL_TRANS_DP_PORT_C;
break;
case INTEL_PORT_D:
TranscoderPort = INTEL_TRANS_DP_PORT_D;
break;
default:
return INTEL_PIPE_ANY;
}
for (uint32 Transcoder = 0; Transcoder < 3; Transcoder++) {
if ((read32(INTEL_TRANSCODER_A_DP_CTL + (Transcoder << 12)) & INTEL_TRANS_DP_PORT_MASK) ==
INTEL_TRANS_DP_PORT(TranscoderPort)) {
switch (Transcoder) {
case 0:
return INTEL_PIPE_A;
case 1:
return INTEL_PIPE_B;
case 2:
return INTEL_PIPE_C;
}
}
}
return INTEL_PIPE_ANY;
}
bool
DisplayPort::IsConnected()
{

2
src/add-ons/accelerants/intel_extreme/Ports.h
View File

@ -183,6 +183,8 @@ virtual bool IsConnected();
virtual status_t SetDisplayMode(display_mode* mode,
uint32 colorMode);
virtual pipe_index PipePreference();
protected:
virtual addr_t _DDCRegister();
virtual addr_t _PortRegister();