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drm/amd/display: Fix VUpdate offset calculations for dcn401

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[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>
This commit is contained in:
Dillon Varone
2025-03-19 13:53:25 -04:00
committed by Alex Deucher
parent 146a4429b5
commit fe45e2af4a
3 changed files with 46 additions and 1 deletions
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44
drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
View File

@@ -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;
}

1
drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h
View File

@@ -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__ */

2
drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c
View File

@@ -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,