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drm/amd/display: Limit Minimum FreeSync Refresh Rate

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Why:
Some EDIDs report a minimum refresh rate lower than what HW can support

How:
Add a check to calculate minimum supported refresh rate with current timing
and use that as the minimum if a lower one is passed in

Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Austin Zheng <austin.zheng@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Austin Zheng 2023-06-01 15:16:45 -04:00 committed by Alex Deucher
parent ec7282bd26
commit da55037afd
7 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -266,6 +266,7 @@ struct dc_caps {
uint16_t subvp_pstate_allow_width_us;
uint16_t subvp_vertical_int_margin_us;
bool seamless_odm;
uint32_t max_v_total;
uint8_t subvp_drr_vblank_start_margin_us;
};

1
drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
View File

@ -2328,6 +2328,7 @@ static bool dcn30_resource_construct(
dc->caps.color.mpc.ocsc = 1;
dc->caps.dp_hdmi21_pcon_support = true;
dc->caps.max_v_total = (1 << 15) - 1;
/* read VBIOS LTTPR caps */
{

1
drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
View File

@ -1227,6 +1227,7 @@ static bool dcn302_resource_construct(
dc->caps.force_dp_tps4_for_cp2520 = true;
dc->caps.extended_aux_timeout_support = true;
dc->caps.dmcub_support = true;
dc->caps.max_v_total = (1 << 15) - 1;
/* Color pipeline capabilities */
dc->caps.color.dpp.dcn_arch = 1;

1
drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
View File

@ -1152,6 +1152,7 @@ static bool dcn303_resource_construct(
dc->caps.force_dp_tps4_for_cp2520 = true;
dc->caps.extended_aux_timeout_support = true;
dc->caps.dmcub_support = true;
dc->caps.max_v_total = (1 << 15) - 1;
/* Color pipeline capabilities */
dc->caps.color.dpp.dcn_arch = 1;

1
drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
View File

@ -2175,6 +2175,7 @@ static bool dcn32_resource_construct(
dc->caps.extended_aux_timeout_support = true;
dc->caps.dmcub_support = true;
dc->caps.seamless_odm = true;
dc->caps.max_v_total = (1 << 15) - 1;
/* Color pipeline capabilities */
dc->caps.color.dpp.dcn_arch = 1;

1
drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
View File

@ -1718,6 +1718,7 @@ static bool dcn321_resource_construct(
dc->caps.edp_dsc_support = true;
dc->caps.extended_aux_timeout_support = true;
dc->caps.dmcub_support = true;
dc->caps.max_v_total = (1 << 15) - 1;
/* Color pipeline capabilities */
dc->caps.color.dpp.dcn_arch = 1;

11
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
View File

@ -1,5 +1,5 @@
/*
* Copyright 2016 Advanced Micro Devices, Inc.
* Copyright 2016-2023 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@ -989,6 +989,7 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
unsigned int refresh_range = 0;
unsigned long long min_refresh_in_uhz = 0;
unsigned long long max_refresh_in_uhz = 0;
unsigned long long min_hardware_refresh_in_uhz = 0;
if (mod_freesync == NULL)
return;
@ -999,7 +1000,13 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
nominal_field_rate_in_uhz =
mod_freesync_calc_nominal_field_rate(stream);
min_refresh_in_uhz = in_config->min_refresh_in_uhz;
if (stream->ctx->dc->caps.max_v_total != 0 && stream->timing.h_total != 0) {
min_hardware_refresh_in_uhz = div64_u64((stream->timing.pix_clk_100hz * 100000000ULL),
(stream->timing.h_total * stream->ctx->dc->caps.max_v_total));
}
/* Limit minimum refresh rate to what can be supported by hardware */
min_refresh_in_uhz = min_hardware_refresh_in_uhz > in_config->min_refresh_in_uhz ?
min_hardware_refresh_in_uhz : in_config->min_refresh_in_uhz;
max_refresh_in_uhz = in_config->max_refresh_in_uhz;
/* Full range may be larger than current video timing, so cap at nominal */