diff options
| author | Ken Chalmers <ken.chalmers@amd.com> | 2018-11-06 14:24:12 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-01-14 15:04:39 -0500 |
| commit | 380604e27bc9c26ce64a83044aa1ea76ffd28caf (patch) | |
| tree | 8e9a9e2cee34380c330bf9e497d0c208606c1a6d /drivers/gpu/drm/amd/display/modules/freesync/freesync.c | |
| parent | 43995f8fb64c54b740262f72ab51d41268c0f7ff (diff) | |
| download | lwn-380604e27bc9c26ce64a83044aa1ea76ffd28caf.tar.gz lwn-380604e27bc9c26ce64a83044aa1ea76ffd28caf.zip | |
drm/amd/display: Use 100 Hz precision for pipe pixel clocks
[Why]
Users would like more accurate pixel clocks, especially for fractional
"TV" frame rates like 59.94 Hz.
[How]
Store and communicate pixel clocks with 100 Hz accuracy from
dc_crtc_timing through to BIOS command table setpixelclock call.
Signed-off-by: Ken Chalmers <ken.chalmers@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index 1544ed3f1747..d967ac001f59 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -108,8 +108,8 @@ static unsigned int calc_duration_in_us_from_v_total( { unsigned int duration_in_us = (unsigned int)(div64_u64(((unsigned long long)(v_total) - * 1000) * stream->timing.h_total, - stream->timing.pix_clk_khz)); + * 10000) * stream->timing.h_total, + stream->timing.pix_clk_100hz)); return duration_in_us; } @@ -126,7 +126,7 @@ static unsigned int calc_v_total_from_refresh( refresh_in_uhz))); v_total = div64_u64(div64_u64(((unsigned long long)( - frame_duration_in_ns) * stream->timing.pix_clk_khz), + frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000000); /* v_total cannot be less than nominal */ @@ -152,7 +152,7 @@ static unsigned int calc_v_total_from_duration( duration_in_us = vrr->max_duration_in_us; v_total = div64_u64(div64_u64(((unsigned long long)( - duration_in_us) * stream->timing.pix_clk_khz), + duration_in_us) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000); /* v_total cannot be less than nominal */ @@ -227,7 +227,7 @@ static void update_v_total_for_static_ramp( } v_total = div64_u64(div64_u64(((unsigned long long)( - current_duration_in_us) * stream->timing.pix_clk_khz), + current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000); in_out_vrr->adjust.v_total_min = v_total; @@ -972,7 +972,7 @@ unsigned long long mod_freesync_calc_nominal_field_rate( unsigned long long nominal_field_rate_in_uhz = 0; /* Calculate nominal field rate for stream */ - nominal_field_rate_in_uhz = stream->timing.pix_clk_khz; + 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); |