From: Mika Kuoppala Date: Tue, 7 Jun 2016 14:18:59 +0000 (+0300) Subject: drm/i915/kbl: Add WaEnableGapsTsvCreditFix X-Git-Tag: v4.8-rc1~62^2~33^2~67 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=e587f6cb0af140f3c0ea794d8616eb9a29969983;p=linux.git drm/i915/kbl: Add WaEnableGapsTsvCreditFix 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 Signed-off-by: Mika Kuoppala Reviewed-by: Matthew Auld Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-8-git-send-email-mika.kuoppala@intel.com --- diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 228c3f75d3c5..02edf85f7456 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1188,12 +1188,17 @@ 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->i915; 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; }