Re: [PATCH 10/24] drm/i915: Leave interrupts enabled while disabling crtcs during suspend

[Daniel Vetter <daniel@ffwll.ch>]

On Fri, Mar 07, 2014 at 06:32:17PM +0200, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> The new watermaek update mechanism requires interrupts to work
> correctly. Because of this we need interrupts while disabling crtcs
> during suspend. So move the irq disable to happen a bit later.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

I guess we have sufficient amounts of WARN_ON(!dev->irqs_enabled)
sprinkled over relevant places already?

Just want to start locking down our setup/teardown sequences as much as
possible since making them more fancy and dynamic is an ongoing effort.
-Daniel

> ---
>  drivers/gpu/drm/i915/i915_drv.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 658fe24..079fb904 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -448,7 +448,6 @@ static int i915_drm_freeze(struct drm_device *dev)
>  
>  		cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
>  
> -		drm_irq_uninstall(dev);
>  		dev_priv->enable_hotplug_processing = false;
>  		/*
>  		 * Disable CRTCs directly since we want to preserve sw state
> @@ -459,6 +458,8 @@ static int i915_drm_freeze(struct drm_device *dev)
>  			dev_priv->display.crtc_disable(crtc);
>  		mutex_unlock(&dev->mode_config.mutex);
>  
> +		drm_irq_uninstall(dev);
> +
>  		intel_modeset_suspend_hw(dev);
>  	}
>  
> -- 
> 1.8.3.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch