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| author | Robin Chen <robin.chen@amd.com> | 2023-12-20 20:31:28 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-03-20 13:37:37 -0400 |
| commit | eed4edda910fe34dfae8c6bfbcf57f4593a54295 (patch) | |
| tree | e81678d481ed5777c9939b08f67f993367e57450 /drivers/gpu/drm/amd/display/dc/optc/dcn10 | |
| parent | c90835b0648edb78f4630b89a2897972c3571cbd (diff) | |
| download | lwn-eed4edda910fe34dfae8c6bfbcf57f4593a54295.tar.gz lwn-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 <jun.lei@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: ChunTao Tso <chuntao.tso@amd.com>
Signed-off-by: Robin Chen<robin.chen@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/dc/optc/dcn10')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h b/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h index 6c2e84d3967f..8a45d26b7531 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h @@ -129,6 +129,8 @@ struct dcn_optc_registers { uint32_t OTG_V_TOTAL_MID; uint32_t OTG_V_TOTAL_MIN; uint32_t OTG_V_TOTAL_CONTROL; + uint32_t OTG_V_COUNT_STOP_CONTROL; + uint32_t OTG_V_COUNT_STOP_CONTROL2; uint32_t OTG_TRIGA_CNTL; uint32_t OTG_TRIGA_MANUAL_TRIG; uint32_t OTG_MANUAL_FLOW_CONTROL; @@ -581,7 +583,9 @@ struct dcn_optc_registers { type OTG_CRC1_WINDOWB_X_END_READBACK;\ type OTG_CRC1_WINDOWB_Y_START_READBACK;\ type OTG_CRC1_WINDOWB_Y_END_READBACK;\ - type OPTC_FGCG_REP_DIS; + type OPTC_FGCG_REP_DIS;\ + type OTG_V_COUNT_STOP;\ + type OTG_V_COUNT_STOP_TIMER; struct dcn_optc_shift { TG_REG_FIELD_LIST(uint8_t) |