From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo@xxxxxxx> [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. Change-Id: Ib88dc8b81b4e5dadca1fa086d2b509e491846396 Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo at amd.com> Reviewed-by: Charlene Liu <Charlene.Liu at amd.com> Acked-by: Leo Li <sunpeng.li at amd.com> --- drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c b/drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c index 2ea490f..04b866f 100644 --- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c +++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c @@ -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); -- 2.7.4
