status_t
detect_displays()
{
// reset known displays
for (uint32 id = 0; id < MAX_DISPLAY; id++) {
gDisplay[id]->attached = false;
gDisplay[id]->powered = false;
gDisplay[id]->foundRanges = false;
}
uint32 displayIndex = 0;
for (uint32 id = 0; id < ATOM_MAX_SUPPORTED_DEVICE; id++) {
if (gConnector[id]->valid == false)
continue;
if (displayIndex >= MAX_DISPLAY)
continue;
if (gConnector[id]->type == VIDEO_CONNECTOR_9DIN) {
TRACE("%s: connector(%" B_PRIu32 "): Skipping 9DIN connector "
"(not yet supported)\n", __func__, id);
continue;
}
if (gConnector[id]->type == VIDEO_CONNECTOR_DP) {
TRACE("%s: connector(%" B_PRIu32 "): Checking DP.\n", __func__, id);
edid1_info* edid = &gDisplay[displayIndex]->edidData;
gDisplay[displayIndex]->attached
= ddc2_dp_read_edid1(id, edid);
if (gDisplay[displayIndex]->attached) {
TRACE("%s: connector(%" B_PRIu32 "): Found DisplayPort EDID!\n",
__func__);
}
}
// TODO: Handle external DP brides - ??
#if 0
if (gConnector[id]->encoderExternal.isDPBridge == true) {
// If this is a DisplayPort Bridge, setup ddc on bus
// TRAVIS (LVDS) or NUTMEG (VGA)
TRACE("%s: is bridge, performing bridge DDC setup\n", __func__);
encoder_external_setup(id, 23860,
EXTERNAL_ENCODER_ACTION_V3_DDC_SETUP);
gDisplay[displayIndex]->attached = true;
// TODO: DDC Router switching for DisplayPort (and others?)
}
#endif
if (gConnector[id]->type == VIDEO_CONNECTOR_LVDS) {
display_mode preferredMode;
bool lvdsInfoFound = connector_read_mode_lvds(id,
&preferredMode);
TRACE("%s: connector(%" B_PRIu32 "): bit-banging LVDS for EDID.\n",
__func__, id);
gDisplay[displayIndex]->attached = connector_read_edid(id,
&gDisplay[displayIndex]->edidData);
if (!gDisplay[displayIndex]->attached && lvdsInfoFound) {
// If we didn't find ddc edid data, fallback to lvdsInfo
// We have to call connector_read_mode_lvds first to
// collect SS data for the lvds connector
TRACE("%s: connector(%" B_PRIu32 "): using AtomBIOS LVDS_Info "
"preferred mode\n", __func__, id);
gDisplay[displayIndex]->attached = true;
memcpy(&gDisplay[displayIndex]->preferredMode,
&preferredMode, sizeof(display_mode));
}
}
// If no display found yet, try more standard detection methods
if (gDisplay[displayIndex]->attached == false) {
TRACE("%s: connector(%" B_PRIu32 "): bit-banging ddc for EDID.\n",
__func__, id);
// Bit-bang edid from connector
gDisplay[displayIndex]->attached = connector_read_edid(id,
&gDisplay[displayIndex]->edidData);
// Found EDID data?
if (gDisplay[displayIndex]->attached) {
TRACE("%s: connector(%" B_PRIu32 "): found EDID data.\n",
__func__, id);
if (gConnector[id]->type == VIDEO_CONNECTOR_DVII
|| gConnector[id]->type == VIDEO_CONNECTOR_HDMIB) {
// These connectors can share gpio pins for data
// communication between digital and analog encoders
// (DVI-I is most common)
edid1_info* edid = &gDisplay[displayIndex]->edidData;
bool analogEncoder
= gConnector[id]->encoder.type == VIDEO_ENCODER_TVDAC
|| gConnector[id]->encoder.type == VIDEO_ENCODER_DAC;
bool digitalEncoder
= gConnector[id]->encoder.type == VIDEO_ENCODER_TMDS;
bool digitalEdid = edid->display.input_type ? true : false;
if (digitalEdid && analogEncoder) {
// Digital EDID + analog encoder? Lets try a load test
gDisplay[displayIndex]->attached
= encoder_analog_load_detect(id);
} else if (!digitalEdid && digitalEncoder) {
// non-digital EDID + digital encoder? Nope.
gDisplay[displayIndex]->attached = false;
}
// Else... everything aligns as it should and attached = 1
}
}
}
if (gDisplay[displayIndex]->attached != true) {
// Nothing interesting here, move along
continue;
}
// We found a valid / attached display
gDisplay[displayIndex]->connectorIndex = id;
// Populate physical connector index from gConnector
init_registers(gDisplay[displayIndex]->regs, displayIndex);
if (gDisplay[displayIndex]->preferredMode.virtual_width > 0) {
// Found a single preferred mode
gDisplay[displayIndex]->foundRanges = false;
} else {
// Use edid data and pull ranges
if (detect_crt_ranges(displayIndex) == B_OK)
gDisplay[displayIndex]->foundRanges = true;
}
displayIndex++;
}
// fallback if no attached monitors were found
if (displayIndex == 0) {
// This is a hack, however as we don't support HPD just yet,
// it tries to prevent a "no displays" situation.
ERROR("%s: ERROR: 0 attached monitors were found on display connectors."
" Injecting first connector as a last resort.\n", __func__);
for (uint32 id = 0; id < ATOM_MAX_SUPPORTED_DEVICE; id++) {
// skip TV DAC connectors as likely fallback isn't for TV
if (gConnector[id]->encoder.type == VIDEO_ENCODER_TVDAC)
continue;
gDisplay[0]->attached = true;
gDisplay[0]->connectorIndex = id;
init_registers(gDisplay[0]->regs, 0);
if (detect_crt_ranges(0) == B_OK)
gDisplay[0]->foundRanges = true;
break;
}
}
// Initial boot state is the first two crtc's powered
if (gDisplay[0]->attached == true)
gDisplay[0]->powered = true;
if (gDisplay[1]->attached == true)
gDisplay[1]->powered = true;
return B_OK;
}
status_t
detect_displays()
{
// reset known displays
for (uint32 id = 0; id < MAX_DISPLAY; id++) {
gDisplay[id]->attached = false;
gDisplay[id]->powered = false;
gDisplay[id]->foundRanges = false;
}
uint32 displayIndex = 0;
for (uint32 id = 0; id < ATOM_MAX_SUPPORTED_DEVICE; id++) {
if (gConnector[id]->valid == false)
continue;
if (displayIndex >= MAX_DISPLAY)
continue;
if (gConnector[id]->type == VIDEO_CONNECTOR_9DIN) {
TRACE("%s: connector(%" B_PRIu32 "): Skipping 9DIN connector "
"(not yet supported)\n", __func__, id);
continue;
}
if (gConnector[id]->type == VIDEO_CONNECTOR_DP) {
TRACE("%s: connector(%" B_PRIu32 "): Checking DP.\n", __func__, id);
edid1_info* edid = &gDisplay[displayIndex]->edidData;
gDisplay[displayIndex]->attached
= ddc2_dp_read_edid1(id, edid);
if (gDisplay[displayIndex]->attached) {
TRACE("%s: connector(%" B_PRIu32 "): Found DisplayPort EDID!\n",
__func__);
}
}
// TODO: Handle external DP brides - ??
#if 0
if (gConnector[id]->encoderExternal.isDPBridge == true) {
// If this is a DisplayPort Bridge, setup ddc on bus
// TRAVIS (LVDS) or NUTMEG (VGA)
TRACE("%s: is bridge, performing bridge DDC setup\n", __func__);
encoder_external_setup(id, 23860,
EXTERNAL_ENCODER_ACTION_V3_DDC_SETUP);
gDisplay[displayIndex]->attached = true;
// TODO: DDC Router switching for DisplayPort (and others?)
}
#endif
if (gConnector[id]->type == VIDEO_CONNECTOR_LVDS) {
// If plain (non-DP) laptop LVDS, read mode info from AtomBIOS
//TRACE("%s: non-DP laptop LVDS detected\n", __func__);
gDisplay[displayIndex]->attached = connector_read_mode_lvds(id,
&gDisplay[displayIndex]->preferredMode);
if (gDisplay[displayIndex]->attached) {
TRACE("%s: connector(%" B_PRIu32 "): found LVDS preferred "
"mode\n", __func__, id);
}
}
// If no display found yet, try more standard detection methods
if (gDisplay[displayIndex]->attached == false) {
TRACE("%s: connector(%" B_PRIu32 "): bit-banging ddc for EDID.\n",
__func__, id);
// Lets try bit-banging edid from connector
gDisplay[displayIndex]->attached
= connector_read_edid(id, &gDisplay[displayIndex]->edidData);
// Since DVI-I shows up as two connectors, and there is only one
// edid channel, we have to make *sure* the edid data received is
// valid for the connector.
// Found EDID data?
if (gDisplay[displayIndex]->attached) {
TRACE("%s: connector(%" B_PRIu32 "): found EDID data.\n",
__func__, id);
bool analogEncoder
= gConnector[id]->encoder.type == VIDEO_ENCODER_TVDAC
|| gConnector[id]->encoder.type == VIDEO_ENCODER_DAC;
edid1_info* edid = &gDisplay[displayIndex]->edidData;
if (!edid->display.input_type && analogEncoder) {
// If non-digital EDID + the encoder is analog...
TRACE("%s: connector(%" B_PRIu32 "): has non-digital EDID "
"and a analog encoder.\n", __func__, id);
gDisplay[displayIndex]->attached
= encoder_analog_load_detect(id);
remove_dup_displays(displayIndex, id);
} else if (edid->display.input_type && !analogEncoder) {
// If EDID is digital, we make an assumption here.
TRACE("%s: connector(%" B_PRIu32 "): has digital EDID "
"and is not a analog encoder.\n", __func__, id);
} else {
// This generally means the monitor is of poor design
// Since we *know* there is no load on the analog encoder
// we assume that it is a digital display.
// This can also occur when a display has both DVI and VGA
// inputs and the graphics board has a DVI-I connector
// (reported as both digital and analog connectors) and the
// analog connection is the one in use. In that case, we
// get here when checking the digital connector and want
// to disable that display in favor of the analog one.
TRACE("%s: connector(%" B_PRIu32 "): Warning: monitor has "
"false digital EDID flag + unloaded analog encoder!\n",
__func__, id);
gDisplay[displayIndex]->attached = false;
}
}
}
if (gDisplay[displayIndex]->attached != true) {
// Nothing interesting here, move along
continue;
}
// We found a valid / attached display
gDisplay[displayIndex]->connectorIndex = id;
// Populate physical connector index from gConnector
init_registers(gDisplay[displayIndex]->regs, displayIndex);
if (gDisplay[displayIndex]->preferredMode.virtual_width > 0) {
// Found a single preferred mode
gDisplay[displayIndex]->foundRanges = false;
} else {
// Use edid data and pull ranges
if (detect_crt_ranges(displayIndex) == B_OK)
gDisplay[displayIndex]->foundRanges = true;
}
displayIndex++;
}
// fallback if no attached monitors were found
if (displayIndex == 0) {
// This is a hack, however as we don't support HPD just yet,
// it tries to prevent a "no displays" situation.
ERROR("%s: ERROR: 0 attached monitors were found on display connectors."
" Injecting first connector as a last resort.\n", __func__);
for (uint32 id = 0; id < ATOM_MAX_SUPPORTED_DEVICE; id++) {
// skip TV DAC connectors as likely fallback isn't for TV
if (gConnector[id]->encoder.type == VIDEO_ENCODER_TVDAC)
continue;
gDisplay[0]->attached = true;
gDisplay[0]->connectorIndex = id;
init_registers(gDisplay[0]->regs, 0);
if (detect_crt_ranges(0) == B_OK)
gDisplay[0]->foundRanges = true;
break;
}
}
// Initial boot state is the first two crtc's powered
if (gDisplay[0]->attached == true)
gDisplay[0]->powered = true;
if (gDisplay[1]->attached == true)
gDisplay[1]->powered = true;
return B_OK;
}
