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From: Daniel Vetter <daniel@ffwll.ch>
To: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH v2] drm/i915: Don't warn if we restore pm interrupts during reset
Date: Thu, 14 Aug 2014 16:23:16 +0200	[thread overview]
Message-ID: <20140814142316.GP10500@phenom.ffwll.local> (raw)
In-Reply-To: <1408020403-21956-1-git-send-email-mika.kuoppala@intel.com>

On Thu, Aug 14, 2014 at 03:46:43PM +0300, Mika Kuoppala wrote:
> We lost the software state tracking due to reset, so don't
> complain if it doesn't match.

This sounds more like gpu reset should be a bit more careful (even more
careful than we already are compared to earlier kernels) with making sure
the irq state is still sane after a reset?

Or what exactly is the failure mode here? The commit message lacks a bit
details in form of a nice text or even better: A testcase ;-)

Thanks, Daniel

> 
> v2: fix build error
> 
> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 12f4e14..7a1309c 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3593,7 +3593,8 @@ static void gen8_enable_rps_interrupts(struct drm_device *dev)
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  
>  	spin_lock_irq(&dev_priv->irq_lock);
> -	WARN_ON(dev_priv->rps.pm_iir);
> +	if (!i915_reset_in_progress(&dev_priv->gpu_error))
> +		WARN_ON(dev_priv->rps.pm_iir);
>  	gen8_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
>  	I915_WRITE(GEN8_GT_IIR(2), dev_priv->pm_rps_events);
>  	spin_unlock_irq(&dev_priv->irq_lock);
> @@ -3604,7 +3605,8 @@ 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);
> -	WARN_ON(dev_priv->rps.pm_iir);
> +	if (!i915_reset_in_progress(&dev_priv->gpu_error))
> +		WARN_ON(dev_priv->rps.pm_iir);
>  	gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
>  	I915_WRITE(GEN6_PMIIR, dev_priv->pm_rps_events);
>  	spin_unlock_irq(&dev_priv->irq_lock);
> -- 
> 1.7.9.5
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

  reply	other threads:[~2014-08-14 14:23 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-14 12:36 [PATCH] drm/i915: Don't warn if we restore pm interrupts during reset Mika Kuoppala
2014-08-14 12:46 ` [PATCH v2] " Mika Kuoppala
2014-08-14 14:23   ` Daniel Vetter [this message]
2014-08-14 14:45     ` Ville Syrjälä
2014-08-14 15:03       ` Daniel Vetter
2014-08-15  6:55       ` Chris Wilson
2014-08-14 15:14     ` Mika Kuoppala
2014-08-14 15:43       ` Mika Kuoppala

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