From 44fc7d5cf30723563558715f0794c8389a5c15ba Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 12 Jul 2013 22:43:27 +0200 Subject: [PATCH] drm/i915: extract rps interrupt enable/disable helpers The VECS enabling required some changes to how rps interrupts are enabled/disabled since VECS interrupts are handling with the PM interrupt registers. But now that the pre/postinstall sequences is identical for all platforms with rps support (snb, ivb, hsw, vlv) we can also use the exact same sequence to actually enable the rps interrupts. Strictly speaking using spinlocks is overkill on snb/ivb & vlv since they have no VECS ring, but imo that's more than made up by the common code. Hence this just unifies the vlv code with the snb-hsw code which matched exactly before the VECS enabling. See commit eda63ffb906c2fb3b609a0e87aeb63c0f25b9e6b Author: Ben Widawsky Date: Tue May 28 19:22:26 2013 -0700 drm/i915: Add PM regs to pre/post install and commit 4848405cced3b46f4ec7d404b8ed5873171ae10a Author: Ben Widawsky Date: Tue May 28 19:22:27 2013 -0700 drm/i915: make PM interrupt writes non-destructive for why the gen6 code (shared between snb, ivb and hsw) needed to be changed originally. v3: Improve the commit message to more clearly spell out why we want to unify the code and what exactly changes. Cc: Paulo Zanoni Cc: Ben Widawsky Reviewed-by: Ben Widawsky Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 59 ++++++++++++++++----------------- 1 file changed, 29 insertions(+), 30 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 96f08724e491..787a528e7200 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3121,13 +3121,10 @@ void valleyview_set_rps(struct drm_device *dev, u8 val) trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv->mem_freq, val)); } - -static void gen6_disable_rps(struct drm_device *dev) +static void gen6_disable_rps_interrupts(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - I915_WRITE(GEN6_RC_CONTROL, 0); - I915_WRITE(GEN6_RPNSWREQ, 1 << 31); I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS); /* Complete PM interrupt masking here doesn't race with the rps work @@ -3142,23 +3139,23 @@ static void gen6_disable_rps(struct drm_device *dev) I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); } +static void gen6_disable_rps(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + I915_WRITE(GEN6_RC_CONTROL, 0); + I915_WRITE(GEN6_RPNSWREQ, 1 << 31); + + gen6_disable_rps_interrupts(dev); +} + static void valleyview_disable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(GEN6_RC_CONTROL, 0); - I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); - I915_WRITE(GEN6_PMIER, 0); - /* Complete PM interrupt masking here doesn't race with the rps work - * item again unmasking PM interrupts because that is using a different - * register (PMIMR) to mask PM interrupts. The only risk is in leaving - * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ - spin_lock_irq(&dev_priv->irq_lock); - dev_priv->rps.pm_iir = 0; - spin_unlock_irq(&dev_priv->irq_lock); - - I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR)); + gen6_disable_rps_interrupts(dev); if (dev_priv->vlv_pctx) { drm_gem_object_unreference(&dev_priv->vlv_pctx->base); @@ -3191,6 +3188,21 @@ int intel_enable_rc6(const struct drm_device *dev) return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE); } +static void gen6_enable_rps_interrupts(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + spin_lock_irq(&dev_priv->irq_lock); + /* FIXME: Our interrupt enabling sequence is bonghits. + * dev_priv->rps.pm_iir really should be 0 here. */ + dev_priv->rps.pm_iir = 0; + I915_WRITE(GEN6_PMIMR, I915_READ(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS); + I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); + spin_unlock_irq(&dev_priv->irq_lock); + /* unmask all PM interrupts */ + I915_WRITE(GEN6_PMINTRMSK, 0); +} + static void gen6_enable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -3319,15 +3331,7 @@ static void gen6_enable_rps(struct drm_device *dev) gen6_set_rps(dev_priv->dev, (gt_perf_status & 0xff00) >> 8); - spin_lock_irq(&dev_priv->irq_lock); - /* FIXME: Our interrupt enabling sequence is bonghits. - * dev_priv->rps.pm_iir really should be 0 here. */ - dev_priv->rps.pm_iir = 0; - I915_WRITE(GEN6_PMIMR, I915_READ(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS); - I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); - spin_unlock_irq(&dev_priv->irq_lock); - /* unmask all PM interrupts */ - I915_WRITE(GEN6_PMINTRMSK, 0); + gen6_enable_rps_interrupts(dev); rc6vids = 0; ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids); @@ -3597,12 +3601,7 @@ static void valleyview_enable_rps(struct drm_device *dev) valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay); - spin_lock_irq(&dev_priv->irq_lock); - WARN_ON(dev_priv->rps.pm_iir != 0); - I915_WRITE(GEN6_PMIMR, 0); - spin_unlock_irq(&dev_priv->irq_lock); - /* enable all PM interrupts */ - I915_WRITE(GEN6_PMINTRMSK, 0); + gen6_enable_rps_interrupts(dev); gen6_gt_force_wake_put(dev_priv); }