From: Jerry (Fangzhi) Zuo Date: Tue, 31 Jul 2018 19:15:38 +0000 (-0400) Subject: drm/amd/display: Fix warning observed in mode change on Vega X-Git-Tag: v4.19~298^2~5^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7cb5285507172fabe87f87ef3d2cfe148e8a918d;p=platform%2Fkernel%2Flinux-rpi3.git drm/amd/display: Fix warning observed in mode change on Vega [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 Reviewed-by: Charlene Liu Acked-by: Leo Li Signed-off-by: Alex Deucher --- 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);