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drm/amd/display: Fix warning observed in mode change on Vega

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[Why]
DOUBLE_BUFFER_EN bit is getting cleared before enable blanking.
That leads to CRTC_BLANK_DATA_EN is getting updated immediately.

[How]
Get DOUBLE_BUFFER_EN bit set, the same as DCE110.

Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jerry (Fangzhi) Zuo 2018-07-31 15:15:38 -04:00 • committed by Alex Deucher
parent 321f65a623
commit 7cb5285507
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c
View file

@ -772,7 +772,7 @@ void dce120_tg_set_blank(struct timing_generator *tg,
CRTC_REG_SET(
CRTC0_CRTC_DOUBLE_BUFFER_CONTROL,
CRTC_BLANK_DATA_DOUBLE_BUFFER_EN, 0);
CRTC_BLANK_DATA_DOUBLE_BUFFER_EN, 1);
if (enable_blanking)
CRTC_REG_SET(CRTC0_CRTC_BLANK_CONTROL, CRTC_BLANK_DATA_EN, 1);