linux-kernel - Re: Oops in i915 intel_init_clock

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Date:	Wed, 22 Jun 2011 11:12:51 -0700
From:	Keith Packard <keithp@...thp.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Alan Stern <stern@...land.harvard.edu>
Cc:	Kernel development list <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: Oops in i915 intel_init_clock_gating

On Wed, 15 Jun 2011 13:32:56 -0700, Jesse Barnes <jbarnes@...tuousgeek.org> wrote:

> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 0defd42..a1a28fb 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -429,6 +429,9 @@ static int i915_drm_thaw(struct drm_device *dev)
>  	/* KMS EnterVT equivalent */
>  	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
>  		mutex_lock(&dev->struct_mutex);
> +
> +		intel_init_clock_gating(dev);
> +
>  		dev_priv->mm.suspended = 0;
>  
>  		error = i915_gem_init_ringbuffer(dev);
> diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
> index 60a94d2..b478d16 100644
> --- a/drivers/gpu/drm/i915/i915_suspend.c
> +++ b/drivers/gpu/drm/i915/i915_suspend.c
> @@ -863,8 +863,6 @@ int i915_restore_state(struct drm_device *dev)
>  		I915_WRITE(IMR, dev_priv->saveIMR);
>  	}
>  
> -	intel_init_clock_gating(dev);
> -
>  	if (IS_IRONLAKE_M(dev)) {
>  		ironlake_enable_drps(dev);
>  		intel_init_emon(dev);
> 

I haven't seen any comments as to whether this patch needs to be merged
into the kernel. Has anyone tested this?

-- 
keith.packard@...el.com

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