Attachment 127012 Details for Bug 97965 – Experimental patch for setting DDL to 0 and WM latency to 45us

[patch] Experimental patch for setting DDL to 0 and WM latency to 45us

0001-Experiment-DDL-0-and-latency-45us.patch (text/plain), 1.69 KB, created by ykku16dev2 on 2016-10-05 02:27:24 UTC

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Creator: ykku16dev2

Created: 2016-10-05 02:27:24 UTC

Size: 1.69 KB

patch

obsolete

>From e93e306e097103eeee5ddd117a91703bdb9f310b Mon Sep 17 00:00:00 2001
>From: Yu Kang Ku <yu.kang.ku@intel.com>
>Date: Tue, 4 Oct 2016 19:21:38 -0700
>Subject: [PATCH] Experiment DDL=0 and latency=45us
>
>Change-Id: I47211028b5224504b76dfa372defd42177521878
>---
> drivers/gpu/drm/i915/intel_pm.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
>index 5d39ad2..f836231 100644
>--- a/drivers/gpu/drm/i915/intel_pm.c
>+++ b/drivers/gpu/drm/i915/intel_pm.c
>@@ -942,13 +942,13 @@ static void vlv_setup_wm_latency(struct drm_device *dev)
> 	struct drm_i915_private *dev_priv = to_i915(dev);
> 
> 	/* all latencies in usec */
>-	dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM2] = 3;
>+	dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM2] = 45;
> 
> 	dev_priv->wm.max_level = VLV_WM_LEVEL_PM2;
> 
> 	if (IS_CHERRYVIEW(dev_priv)) {
>-		dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM5] = 12;
>-		dev_priv->wm.pri_latency[VLV_WM_LEVEL_DDR_DVFS] = 33;
>+		dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM5] = 45;
>+		dev_priv->wm.pri_latency[VLV_WM_LEVEL_DDR_DVFS] = 45;
> 
> 		dev_priv->wm.max_level = VLV_WM_LEVEL_DDR_DVFS;
> 	}
>@@ -1320,10 +1320,10 @@ static void vlv_merge_wm(struct drm_device *dev,
> 		if (wm->cxsr)
> 			wm->sr = wm_state->sr[wm->level];
> 
>-		wm->ddl[pipe].primary = DDL_PRECISION_HIGH | 2;
>-		wm->ddl[pipe].sprite[0] = DDL_PRECISION_HIGH | 2;
>-		wm->ddl[pipe].sprite[1] = DDL_PRECISION_HIGH | 2;
>-		wm->ddl[pipe].cursor = DDL_PRECISION_HIGH | 2;
>+		wm->ddl[pipe].primary = DDL_PRECISION_HIGH | 0;
>+		wm->ddl[pipe].sprite[0] = DDL_PRECISION_HIGH | 0;
>+		wm->ddl[pipe].sprite[1] = DDL_PRECISION_HIGH | 0;
>+		wm->ddl[pipe].cursor = DDL_PRECISION_HIGH | 0;
> 	}
> }
> 
>-- 
>1.9.1
>

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