diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2022-09-05 14:15:04 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2022-09-05 14:15:04 +0000 |
| commit | c7b1440d65158a260c32e0281d507a00698c215d (patch) | |
| tree | 0747245484150a17c465b18b2c7273202314a530 /sys/dev | |
| parent | 457c3182c69ad27f3248e9c86234a078ff968b2b (diff) | |
drm/amd/display: clear optc underflow before turn off odm clock
From Fudong Wang
5ee30bcfdb32526233d2572f3d9ec371928679f1 in linux 5.15.y/5.15.65
b2a93490201300a749ad261b5c5d05cb50179c44 in mainline linux
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_optc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_optc.c b/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_optc.c index 03e8b26b1d7..b9092a7ec2a 100644 --- a/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_optc.c +++ b/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_optc.c @@ -480,6 +480,11 @@ void optc1_enable_optc_clock(struct timing_generator *optc, bool enable) OTG_CLOCK_ON, 1, 1, 1000); } else { + + //last chance to clear underflow, otherwise, it will always there due to clock is off. + if (optc->funcs->is_optc_underflow_occurred(optc) == true) + optc->funcs->clear_optc_underflow(optc); + REG_UPDATE_2(OTG_CLOCK_CONTROL, OTG_CLOCK_GATE_DIS, 0, OTG_CLOCK_EN, 0); |