diff options
| author | Robin Chen <[email protected]> | 2023-12-20 12:31:28 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2024-03-20 17:37:37 +0000 |
| commit | eed4edda910fe34dfae8c6bfbcf57f4593a54295 (patch) | |
| tree | e81678d481ed5777c9939b08f67f993367e57450 /drivers/gpu/drm/amd/display/modules/freesync/freesync.c | |
| parent | drm/amd/display: 3.2.274 (diff) | |
| download | kernel-eed4edda910fe34dfae8c6bfbcf57f4593a54295.tar.gz kernel-eed4edda910fe34dfae8c6bfbcf57f4593a54295.zip | |
drm/amd/display: Support long vblank feature
[WHY]
We want to support low hz case, but the original
vtotal/vtotal_min/vtotal_max can't support more
than 0x7FFF.
[HOW]
We use the 2 HW reg to contorl long vblank case.
1. OTG_V_COUNT_STOP_CONTROL -> vcount_stop
2. OTG_V_COUNT_STOP_CONTROL2 -> vcount_stop_timer
vcount_stop define from which line we stop using vcount
and start using vcount2.
vcount_stop_timer define how long we use vcount2.
Ex:
Vtotal = 7
OTG_V_COUNT_STOP_CONTROL = 4
OTG_V_COUNT_STOP_CONTROL2 = 5
time : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
vcount : 0, 1, 2, 3, - - - - - 4, 5, 6
vcount2 : 0, 1, 2, 3, 4,
Reviewed-by: Jun Lei <[email protected]>
Acked-by: Alex Hung <[email protected]>
Signed-off-by: ChunTao Tso <[email protected]>
Signed-off-by: Robin Chen<[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index 3955b7e4b2e2..fbaa6effd0e3 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -1126,6 +1126,8 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync, in_out_vrr->adjust.v_total_min = stream->timing.v_total; in_out_vrr->adjust.v_total_max = stream->timing.v_total; } + + in_out_vrr->adjust.allow_otg_v_count_halt = (in_config->state == VRR_STATE_ACTIVE_FIXED) ? true : false; } void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync, |