From f1b8479dc997a0e625f3d94920cd778f55e299b5 Mon Sep 17 00:00:00 2001 From: Rodrigo Siqueira Date: Wed, 14 Feb 2024 13:32:32 -0700 Subject: [PATCH] drm/amd/display: Add comments to v_total calculation and drop legacy TODO [WHY & HOW] This commit just adds some simple comments to help understand the calculation of V total duration for Freesync. Also, remove a legacy TODO comment from link service type. Acked-by: Alex Hung Signed-off-by: Rodrigo Siqueira Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/include/link_service_types.h | 1 - drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 4 ++-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/include/link_service_types.h b/drivers/gpu/drm/amd/display/include/link_service_types.h index 92dbff22a7c60..1867aac57cf2c 100644 --- a/drivers/gpu/drm/amd/display/include/link_service_types.h +++ b/drivers/gpu/drm/amd/display/include/link_service_types.h @@ -73,7 +73,6 @@ struct link_training_settings { enum dc_pre_emphasis *pre_emphasis; enum dc_post_cursor2 *post_cursor2; bool should_set_fec_ready; - /* TODO - factor lane_settings out because it changes during LT */ union dc_dp_ffe_preset *ffe_preset; uint16_t cr_pattern_time; diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index fbaa6effd0e3d..b19ef58d1555a 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -158,13 +158,13 @@ static unsigned int calc_v_total_from_duration( if (duration_in_us > vrr->max_duration_in_us) duration_in_us = vrr->max_duration_in_us; - if (dc_is_hdmi_signal(stream->signal)) { + if (dc_is_hdmi_signal(stream->signal)) { // change for HDMI to comply with spec uint32_t h_total_up_scaled; h_total_up_scaled = stream->timing.h_total * 10000; v_total = div_u64((unsigned long long)duration_in_us * stream->timing.pix_clk_100hz + (h_total_up_scaled - 1), - h_total_up_scaled); + h_total_up_scaled); //ceiling for MMax and MMin for MVRR } else { v_total = div64_u64(div64_u64(((unsigned long long)( duration_in_us) * (stream->timing.pix_clk_100hz / 10)), -- 2.30.2