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platinum: Fix MON_ID_SENSE read/write.

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This commit is contained in:
joevt
2024-05-04 22:17:57 -07:00
committed by dingusdev
parent a593a4a73e
commit 05658ad5c5
1 changed files with 5 additions and 4 deletions
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9
devices/memctrl/platinum.cpp
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@@ -143,7 +143,7 @@ uint32_t PlatinumCtrl::read(uint32_t rgn_start, uint32_t offset, int size) {
value = this->fb_addr;
break;
case PlatinumReg::MON_ID_SENSE:
value = (this->mon_sense ^ 7);
value = this->mon_sense;
break;
case PlatinumReg::FB_TEST:
value = this->fb_test;
@@ -268,11 +268,12 @@ void PlatinumCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, in
break;
case PlatinumReg::MON_ID_SENSE:
value &= 7;
this->mon_sense = this->display_id->read_monitor_sense(value, value ^ 7)
<< (value ^ 7);
uint8_t dirs = value ^ 7;
uint8_t levels = (this->fb_test >> SENSE_LINE_OUTPUT_DATA_pos) & 7;
levels = (levels & dirs) | (dirs ^ 7);
this->mon_sense = (dirs << 3) | (this->display_id->read_monitor_sense(levels, dirs) ^ 7);
break;
case PlatinumReg::FB_RESET:
if (value == 7 && this->crtc_on) {
LOG_F(INFO, "%s: video disabled", this->name.c_str());
this->reset_step = 0;