[PATCH] drm/i915/display: Adjust Added Wake Time with PKG_C_LATENCY

[Animesh Manna]

The PKG_C_LATENCY Added Wake Time field is not working.
When added wake time is needed, such as for flip queue
DSB execution, increase the PKG_C_LATENCY Pkg C Latency
field by the added wake time.

HSD: 14023564296
WA: 22020432604

Signed-off-by: Animesh Manna <animesh.manna at intel.com>
---
 drivers/gpu/drm/i915/display/skl_watermark.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index 1a4c1fa24820..9be38ca5346d 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -2875,6 +2875,12 @@ skl_program_dpkgc_latency(struct drm_i915_private *i915, bool enable_dpkgc)
 		added_wake_time = 0;
 	}
 
+	/* Wa_22020432604 */
+	if (DISPLAY_VER(i915) == 30) {
+		max_latency += added_wake_time;
+		added_wake_time = 0;
+	}
+
 	clear |= LNL_ADDED_WAKE_TIME_MASK | LNL_PKG_C_LATENCY_MASK;
 	val |= REG_FIELD_PREP(LNL_PKG_C_LATENCY_MASK, max_latency);
 	val |= REG_FIELD_PREP(LNL_ADDED_WAKE_TIME_MASK, added_wake_time);
-- 
2.29.0