diff options
| author | Dillon Varone <dillon.varone@amd.com> | 2025-03-19 13:53:25 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-04-07 15:18:37 -0400 |
| commit | fe45e2af4a22e569b35b7f45eb9f040f6fbef94f (patch) | |
| tree | 7babde3b55e59d882a5b45824a3beb7bb823e5b5 /drivers/gpu | |
| parent | 146a4429b5674b7520a96aea34233949731c6086 (diff) | |
drm/amd/display: Fix VUpdate offset calculations for dcn401
[WHY&HOW]
DCN401 uses a different structure to store the VStartup offset used to
calculate the VUpdate position, so adjust the calculations to use this
value.
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
3 files changed, 46 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c index 5489f3d431f6..79f4eaf8fc52 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c @@ -2646,3 +2646,47 @@ void dcn401_plane_atomic_power_down(struct dc *dc, if (hws->funcs.dpp_root_clock_control) hws->funcs.dpp_root_clock_control(hws, dpp->inst, false); } + +/* + * apply_front_porch_workaround + * + * This is a workaround for a bug that has existed since R5xx and has not been + * fixed keep Front porch at minimum 2 for Interlaced mode or 1 for progressive. + */ +static void apply_front_porch_workaround( + struct dc_crtc_timing *timing) +{ + if (timing->flags.INTERLACE == 1) { + if (timing->v_front_porch < 2) + timing->v_front_porch = 2; + } else { + if (timing->v_front_porch < 1) + timing->v_front_porch = 1; + } +} + +int dcn401_get_vupdate_offset_from_vsync(struct pipe_ctx *pipe_ctx) +{ + const struct dc_crtc_timing *dc_crtc_timing = &pipe_ctx->stream->timing; + struct dc_crtc_timing patched_crtc_timing; + int vesa_sync_start; + int asic_blank_end; + int interlace_factor; + + patched_crtc_timing = *dc_crtc_timing; + apply_front_porch_workaround(&patched_crtc_timing); + + interlace_factor = patched_crtc_timing.flags.INTERLACE ? 2 : 1; + + vesa_sync_start = patched_crtc_timing.v_addressable + + patched_crtc_timing.v_border_bottom + + patched_crtc_timing.v_front_porch; + + asic_blank_end = (patched_crtc_timing.v_total - + vesa_sync_start - + patched_crtc_timing.v_border_top) + * interlace_factor; + + return asic_blank_end - + pipe_ctx->global_sync.dcn4x.vstartup_lines + 1; +} diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h index 781cf0efccc6..37c915568afc 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h @@ -109,4 +109,5 @@ void dcn401_detect_pipe_changes( void dcn401_plane_atomic_power_down(struct dc *dc, struct dpp *dpp, struct hubp *hubp); +int dcn401_get_vupdate_offset_from_vsync(struct pipe_ctx *pipe_ctx); #endif /* __DC_HWSS_DCN401_H__ */ diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c index fe7aceb2f510..aa9573ce44fc 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c @@ -73,7 +73,7 @@ static const struct hw_sequencer_funcs dcn401_funcs = { .init_sys_ctx = dcn20_init_sys_ctx, .init_vm_ctx = dcn20_init_vm_ctx, .set_flip_control_gsl = dcn20_set_flip_control_gsl, - .get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync, + .get_vupdate_offset_from_vsync = dcn401_get_vupdate_offset_from_vsync, .calc_vupdate_position = dcn10_calc_vupdate_position, .apply_idle_power_optimizations = dcn401_apply_idle_power_optimizations, .does_plane_fit_in_mall = NULL, |