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| author | Aric Cyr <aric.cyr@amd.com> | 2019-09-11 16:17:08 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 16:44:02 +0100 |
| commit | 2dc436de7ad6aa1025d0c78eefac4aa7ececc44a (patch) | |
| tree | f66cc4338ccd2a087695b6d542a2fd334dd4f8eb /drivers/gpu/drm/amd/display/modules/freesync/freesync.c | |
| parent | 4754e8234e06393d98d95c4188e6661ed0b1da5a (diff) | |
| download | linux-stable-2dc436de7ad6aa1025d0c78eefac4aa7ececc44a.tar.gz linux-stable-2dc436de7ad6aa1025d0c78eefac4aa7ececc44a.tar.bz2 linux-stable-2dc436de7ad6aa1025d0c78eefac4aa7ececc44a.zip | |
drm/amd/display: Properly round nominal frequency for SPD
[ Upstream commit c59802313e84bede954235b3a5dd0dd5325f49c5 ]
[Why]
Some displays rely on the SPD verticle frequency maximum value.
Must round the calculated refresh rate to the nearest integer.
[How]
Round the nominal calculated refresh rate to the nearest whole
integer.
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index ec70c9b12e1a..0978c698f0f8 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -743,6 +743,10 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync, nominal_field_rate_in_uhz = mod_freesync_calc_nominal_field_rate(stream); + /* Rounded to the nearest Hz */ + nominal_field_rate_in_uhz = 1000000ULL * + div_u64(nominal_field_rate_in_uhz + 500000, 1000000); + min_refresh_in_uhz = in_config->min_refresh_in_uhz; max_refresh_in_uhz = in_config->max_refresh_in_uhz; @@ -996,14 +1000,13 @@ unsigned long long mod_freesync_calc_nominal_field_rate( const struct dc_stream_state *stream) { unsigned long long nominal_field_rate_in_uhz = 0; + unsigned int total = stream->timing.h_total * stream->timing.v_total; - /* Calculate nominal field rate for stream */ + /* Calculate nominal field rate for stream, rounded up to nearest integer */ nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz / 10; nominal_field_rate_in_uhz *= 1000ULL * 1000ULL * 1000ULL; - nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, - stream->timing.h_total); - nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, - stream->timing.v_total); + + nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, total); return nominal_field_rate_in_uhz; } |