diff options
| author | Austin Zheng <austin.zheng@amd.com> | 2023-06-01 15:16:45 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-06-15 10:44:49 -0400 |
| commit | da55037afde24d74a1a3f26e4d314f897f3432b4 (patch) | |
| tree | 338931186f45ed3d08804771b757ab663c4bf8f3 /drivers/gpu/drm/amd/display/modules/freesync | |
| parent | ec7282bd2688c6c741c79f8696a68c6c0403cf2d (diff) | |
drm/amd/display: Limit Minimum FreeSync Refresh Rate
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>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index 5798c0eafa1f..dbd60811f95d 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -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 */ |