Attachment 125690 Details for Bug 96981 – drm/i915/kbl: Limit WaDisableDynamicCreditSharing to A0

[patch] drm/i915/kbl: Limit WaDisableDynamicCreditSharing to A0

0001-drm-i915-kbl-Limit-WaDisableDynamicCreditSharing-to-.patch (text/plain), 1.48 KB, created by Mika Kuoppala on 2016-08-11 08:10:36 UTC

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Creator: Mika Kuoppala

Created: 2016-08-11 08:10:36 UTC

Size: 1.48 KB

patch

obsolete

>From 3699d416454472ef46bf09c87829e68ae40a1980 Mon Sep 17 00:00:00 2001
>From: Mika Kuoppala <mika.kuoppala@intel.com>
>Date: Thu, 11 Aug 2016 10:42:01 +0300
>Subject: [PATCH] drm/i915/kbl: Limit WaDisableDynamicCreditSharing to A0
>
>Bspec states that this wa is for A0/B0 revs and this is noted in
>commit b90420467232 ("drm/i915/kbl: Add WaDisableDynamicCreditSharing")
>But other sources state that this is for A0 only. Also evidence indicates
>that with some kbl variants the bit doesn't stick. So trust the other
>sources and limit the scope for A0 only.
>
>References: https://bugs.freedesktop.org/show_bug.cgi?id=96981
>Fixes: b90420467232 ("drm/i915/kbl: Add WaDisableDynamicCreditSharing")
>Cc: drm-intel-fixes@lists.freedesktop.org
>Cc: Matthew Auld <matthew.auld@intel.com>
>Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
>---
> drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
>index 09f01c641c14..63316a6ea46c 100644
>--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
>+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
>@@ -1176,7 +1176,7 @@ static int kbl_init_workarounds(struct intel_engine_cs *engine)
> 				   GEN9_GAPS_TSV_CREDIT_DISABLE));
> 
> 	/* WaDisableDynamicCreditSharing:kbl */
>-	if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0))
>+	if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0))
> 		WA_SET_BIT(GAMT_CHKN_BIT_REG,
> 			   GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING);
> 
>-- 
>2.7.4
>

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Attachments on bug 96981: 125135 | 125690

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