Re: [PATCH] drm/i915: WARN if interrupts aren't on in en/disable_pipestat

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On Wed, 27 Aug 2014 10:43:37 +0200
Daniel Vetter <daniel.vetter@ffwll.ch> wrote:

> Now that vlv has runtime pm we kinda should check for that like on the
> pch split platforms. Looks like this was simply lost in the vlv rpm
> enabling.
> 
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> Cc: Imre Deak <imre.deak@intel.com>
> Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  drivers/gpu/drm/i915/i915_irq.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 9eb303c1b621..76bc4d0de5a4 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -589,6 +589,7 @@ __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
>  	u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
>  
>  	assert_spin_locked(&dev_priv->irq_lock);
> +	WARN_ON(!intel_irqs_enabled(dev_priv));
>  
>  	if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
>  		      status_mask & ~PIPESTAT_INT_STATUS_MASK,
> @@ -615,6 +616,7 @@ __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
>  	u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
>  
>  	assert_spin_locked(&dev_priv->irq_lock);
> +	WARN_ON(!intel_irqs_enabled(dev_priv));
>  
>  	if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
>  		      status_mask & ~PIPESTAT_INT_STATUS_MASK,

Yeah looks good, wonder if it'll trigger any new warnings.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>

-- 
Jesse Barnes, Intel Open Source Technology Center