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drm/i915/kbl: Add WaEnableGapsTsvCreditFix

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We need this crucial workaround from skl also to all kbl revisions.
Lack of it was causing system hangs on skl enabling so this is
a must have.

v2: Don't add revid checks to gen9 init workarounds (Arun)

References: HSD#2126660
Cc: Arun Siluvery <[email protected]>
Signed-off-by: Mika Kuoppala <[email protected]>
Reviewed-by: Matthew Auld <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit e587f6cb0a)
Signed-off-by: Mika Kuoppala <[email protected]>
This commit is contained in:
Mika Kuoppala 2016-06-07 17:18:59 +03:00 • committed by Mika Kuoppala
commit 7916450982
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/intel_ringbuffer.c
View file

@ -1191,12 +1191,17 @@ static int bxt_init_workarounds(struct intel_engine_cs *engine)
static int kbl_init_workarounds(struct intel_engine_cs *engine)
{
struct drm_i915_private *dev_priv = engine->dev->dev_private;
int ret;
ret = gen9_init_workarounds(engine);
if (ret)
return ret;
/* WaEnableGapsTsvCreditFix:kbl */
I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) |
GEN9_GAPS_TSV_CREDIT_DISABLE));
return 0;
}