| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.7 087/376] drm/amd/display: Revert to old formula in set_vtg_params | Date | Fri, 19 Jun 2020 16:30:05 +0200 |
| |
From: Alvin Lee <alvin.lee2@amd.com>
[ Upstream commit a1a0e61f3c43c610f0a3c109348c14ce930c1977 ]
[Why] New formula + cursor change causing underflow on certain configs
[How] Rever to old formula
Signed-off-by: Alvin Lee <alvin.lee2@amd.com> Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c index 17d96ec6acd8..ec0ab42becba 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c @@ -299,6 +299,7 @@ void optc1_set_vtg_params(struct timing_generator *optc, uint32_t asic_blank_end; uint32_t v_init; uint32_t v_fp2 = 0; + int32_t vertical_line_start; struct optc *optc1 = DCN10TG_FROM_TG(optc); @@ -315,8 +316,9 @@ void optc1_set_vtg_params(struct timing_generator *optc, patched_crtc_timing.v_border_top; /* if VSTARTUP is before VSYNC, FP2 is the offset, otherwise 0 */ - if (optc1->vstartup_start > asic_blank_end) - v_fp2 = optc1->vstartup_start - asic_blank_end; + vertical_line_start = asic_blank_end - optc1->vstartup_start + 1; + if (vertical_line_start < 0) + v_fp2 = -vertical_line_start; /* Interlace */ if (REG(OTG_INTERLACE_CONTROL)) { -- 2.25.1
|