From 8aaf8da07a8b542c0a0f4da2601da07beddfdeb0 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 16 Jul 2024 12:49:25 -0400 Subject: [PATCH] drm/amd/display: fix corruption with high refresh rates on DCN 3.0 This reverts commit bc87d666c05a13e6d4ae1ddce41fc43d2567b9a2 and the register changes from commit 6d4279cb99ac4f51d10409501d29969f687ac8dc. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3478 Cc: mikhail.v.gavrilov@gmail.com Cc: Rodrigo Siqueira Signed-off-by: Alex Deucher --- .../drm/amd/display/dc/optc/dcn10/dcn10_optc.c | 15 +++------------ .../drm/amd/display/dc/optc/dcn20/dcn20_optc.c | 10 ++++++++++ 2 files changed, 13 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.c index 4f82146d94b1..f00d27b7c6fe 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.c @@ -950,19 +950,10 @@ void optc1_set_drr( OTG_FORCE_LOCK_ON_EVENT, 0, OTG_SET_V_TOTAL_MIN_MASK_EN, 0, OTG_SET_V_TOTAL_MIN_MASK, 0); - - // Setup manual flow control for EOF via TRIG_A - optc->funcs->setup_manual_trigger(optc); - - } else { - REG_UPDATE_4(OTG_V_TOTAL_CONTROL, - OTG_SET_V_TOTAL_MIN_MASK, 0, - OTG_V_TOTAL_MIN_SEL, 0, - OTG_V_TOTAL_MAX_SEL, 0, - OTG_FORCE_LOCK_ON_EVENT, 0); - - optc->funcs->set_vtotal_min_max(optc, 0, 0); } + + // Setup manual flow control for EOF via TRIG_A + optc->funcs->setup_manual_trigger(optc); } void optc1_set_vtotal_min_max(struct timing_generator *optc, int vtotal_min, int vtotal_max) diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c index 43417cff2c9b..b4694985a40a 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c @@ -453,6 +453,16 @@ void optc2_setup_manual_trigger(struct timing_generator *optc) { struct optc *optc1 = DCN10TG_FROM_TG(optc); + /* Set the min/max selectors unconditionally so that + * DMCUB fw may change OTG timings when necessary + * TODO: Remove the w/a after fixing the issue in DMCUB firmware + */ + REG_UPDATE_4(OTG_V_TOTAL_CONTROL, + OTG_V_TOTAL_MIN_SEL, 1, + OTG_V_TOTAL_MAX_SEL, 1, + OTG_FORCE_LOCK_ON_EVENT, 0, + OTG_SET_V_TOTAL_MIN_MASK, (1 << 1)); /* TRIGA */ + REG_SET_8(OTG_TRIGA_CNTL, 0, OTG_TRIGA_SOURCE_SELECT, 21, OTG_TRIGA_SOURCE_PIPE_SELECT, optc->inst, -- 2.45.2