From: "Jerry (Fangzhi) Zuo" <jerry....@amd.com>
[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....@amd.com>
Reviewed-by: Charlene Liu <charlene....@amd.com>
Acked-by: Leo Li <sunpeng...@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
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