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drm/amd/display: fix use of uninitialized memory

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DML does not calculate chroma values for RQ when surface is not YUV, but DC
will unconditionally use the uninitialized values for HW programming.
This does not cause visual corruption since HW will ignore garbage chroma
values when surface is not YUV, but causes presubmission tests to fail
golden value comparison.

Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Signed-off-by: Eryk Brol <eryk.brol@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wesley Chalmers 2018-05-29 17:45:05 -04:00 • committed by Alex Deucher
parent 836758ffe7
commit f3e077d95c
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
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@ -239,6 +239,8 @@ void dml1_extract_rq_regs(
extract_rq_sizing_regs(mode_lib, &(rq_regs->rq_regs_l), rq_param.sizing.rq_l);
if (rq_param.yuv420)
extract_rq_sizing_regs(mode_lib, &(rq_regs->rq_regs_c), rq_param.sizing.rq_c);
else
memset(&(rq_regs->rq_regs_c), 0, sizeof(rq_regs->rq_regs_c));
rq_regs->rq_regs_l.swath_height = dml_log2(rq_param.dlg.rq_l.swath_height);
rq_regs->rq_regs_c.swath_height = dml_log2(rq_param.dlg.rq_c.swath_height);