From: Tvrtko Ursulin Date: Thu, 13 Nov 2014 17:51:51 +0000 (+0000) Subject: drm/i915/skl: Use correct use counters for force wakes X-Git-Tag: firefly_0821_release~176^2~2672^2~14^2~66 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6e7cc470bc182389af15c9b7fe78bb40b7dc44e9;p=firefly-linux-kernel-4.4.55.git drm/i915/skl: Use correct use counters for force wakes Write and reads following the block changed use engine specific use counters and unless that is matched here force wake use counting goes bad. Same force wake is attempted to be taken twice which leads to at least time outs. NOTE: Depending on feedback from hardware designers it may not be necessary to grab force wakes on Gen9 here. But for Gen8 it is needed due to a race between RC6 and ELSP writes. v2: Added blitter force wake engine and made more future proof. Added commit note. Reviewed-by: Damien Lespiau Signed-off-by: Tvrtko Ursulin Cc: Damien Lespiau Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index af0c18a0aefe..0eee4288519b 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -276,7 +276,8 @@ static void execlists_elsp_write(struct intel_engine_cs *ring, struct drm_i915_gem_object *ctx_obj0, struct drm_i915_gem_object *ctx_obj1) { - struct drm_i915_private *dev_priv = ring->dev->dev_private; + struct drm_device *dev = ring->dev; + struct drm_i915_private *dev_priv = dev->dev_private; uint64_t temp = 0; uint32_t desc[4]; unsigned long flags; @@ -301,13 +302,18 @@ static void execlists_elsp_write(struct intel_engine_cs *ring, * Instead, we do the runtime_pm_get/put when creating/destroying requests. */ spin_lock_irqsave(&dev_priv->uncore.lock, flags); - if (IS_CHERRYVIEW(dev_priv->dev)) { + if (IS_CHERRYVIEW(dev) || INTEL_INFO(dev)->gen >= 9) { if (dev_priv->uncore.fw_rendercount++ == 0) dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_RENDER); if (dev_priv->uncore.fw_mediacount++ == 0) dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_MEDIA); + if (INTEL_INFO(dev)->gen >= 9) { + if (dev_priv->uncore.fw_blittercount++ == 0) + dev_priv->uncore.funcs.force_wake_get(dev_priv, + FORCEWAKE_BLITTER); + } } else { if (dev_priv->uncore.forcewake_count++ == 0) dev_priv->uncore.funcs.force_wake_get(dev_priv, @@ -326,13 +332,18 @@ static void execlists_elsp_write(struct intel_engine_cs *ring, /* Release Force Wakeup (see the big comment above). */ spin_lock_irqsave(&dev_priv->uncore.lock, flags); - if (IS_CHERRYVIEW(dev_priv->dev)) { + if (IS_CHERRYVIEW(dev) || INTEL_INFO(dev)->gen >= 9) { if (--dev_priv->uncore.fw_rendercount == 0) dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_RENDER); if (--dev_priv->uncore.fw_mediacount == 0) dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_MEDIA); + if (INTEL_INFO(dev)->gen >= 9) { + if (--dev_priv->uncore.fw_blittercount == 0) + dev_priv->uncore.funcs.force_wake_put(dev_priv, + FORCEWAKE_BLITTER); + } } else { if (--dev_priv->uncore.forcewake_count == 0) dev_priv->uncore.funcs.force_wake_put(dev_priv,