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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/core | |
parent | c90835b0648edb78f4630b89a2897972c3571cbd (diff) | |
download | linux-stable-eed4edda910fe34dfae8c6bfbcf57f4593a54295.tar.gz linux-stable-eed4edda910fe34dfae8c6bfbcf57f4593a54295.tar.bz2 linux-stable-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/core')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 5c8b0183959c..64ab99628125 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -386,6 +386,30 @@ static void dc_perf_trace_destroy(struct dc_perf_trace **perf_trace) *perf_trace = NULL; } +static bool set_long_vtotal(struct dc *dc, struct dc_stream_state *stream, struct dc_crtc_timing_adjust *adjust) +{ + if (!dc || !stream || !adjust) + return false; + + if (!dc->current_state) + return false; + + int i; + + for (i = 0; i < MAX_PIPES; i++) { + struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i]; + + if (pipe->stream == stream && pipe->stream_res.tg) { + if (dc->hwss.set_long_vtotal) + dc->hwss.set_long_vtotal(&pipe, 1, adjust->v_total_min, adjust->v_total_max); + + return true; + } + } + + return false; +} + /** * dc_stream_adjust_vmin_vmax - look up pipe context & update parts of DRR * @dc: dc reference @@ -420,6 +444,15 @@ bool dc_stream_adjust_vmin_vmax(struct dc *dc, stream->adjust.v_total_mid = adjust->v_total_mid; stream->adjust.v_total_mid_frame_num = adjust->v_total_mid_frame_num; stream->adjust.v_total_min = adjust->v_total_min; + stream->adjust.allow_otg_v_count_halt = adjust->allow_otg_v_count_halt; + + if (dc->caps.max_v_total != 0 && + (adjust->v_total_max > dc->caps.max_v_total || adjust->v_total_min > dc->caps.max_v_total)) { + if (adjust->allow_otg_v_count_halt) + return set_long_vtotal(dc, stream, adjust); + else + return false; + } for (i = 0; i < MAX_PIPES; i++) { struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i]; |