[Intel-gfx] [PATCH] drm/i915: Add more latency to avoid display flicker

[Lee, Shawn C]

From: "Lee, Shawn C" <shawn.c.lee at intel.com>

LFP flicker with latest drm-nightly on customer board. After increase
latency value and this symptom can't be reproduced.

TEST=Reboot DUT and no flicking on LFP.

Cc: Kumar, Mahesh <mahesh1.kumar at intel.com>
Cc: Gary C Wang <gary.c.wang at intel.com>

Signed-off-by: Shawn Lee <shawn.c.lee at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e7ab17d38680..2faea497e00c 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4410,7 +4410,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 		latency += 4;
 
 	if (apply_memory_bw_wa && x_tiled)
-		latency += 15;
+		latency += 60;
 
 	if (plane->id == PLANE_CURSOR) {
 		width = intel_pstate->base.crtc_w;
-- 
2.7.4