[Intel-gfx] [PATCH] drm/i915: shut up gen8+ SDE irq dmesg noise, again

[Daniel Vetter]

On Thu, Jan 07, 2016 at 10:29:10AM +0200, Jani Nikula wrote:
> We still keep getting
> 
> [    4.249930] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
> 
> This reverts
> 
> commit 820da7ae46332fa709b171eb7ba57cbd023fa6df
> Author: Jani Nikula <jani.nikula at intel.com>
> Date:   Wed Nov 25 16:47:23 2015 +0200
> 
>     Revert "drm/i915: shut up gen8+ SDE irq dmesg noise"
> 
> which in itself is a revert, so this is just doing
> 
> commit 97e5ed1111dcc5300a0f59a55248cd243937a8ab
> Author: Daniel Vetter <daniel.vetter at ffwll.ch>
> Date:   Fri Oct 23 10:56:12 2015 +0200
> 
>     drm/i915: shut up gen8+ SDE irq dmesg noise
> 
> all over again. I'll stop pretending I understand what's going on like I
> did when I thought I'd fixed this for good in
> 
> commit 6a39d7c986be4fd18eb019e9cdbf774ec36c9f77
> Author: Jani Nikula <jani.nikula at intel.com>
> Date:   Wed Nov 25 16:47:22 2015 +0200
> 
>     drm/i915: fix the SDE irq dmesg warnings properly
> 
> Reported-by: Chris Wilson <chris at chris-wilson.co.uk>
> Reference: http://mid.gmane.org/20151213124945.GA5715@nuc-i3427.alporthouse.com
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92084
> Cc: drm-intel-fixes at lists.freedesktop.org
> Fixes: 820da7ae4633 ("Revert "drm/i915: shut up gen8+ SDE irq dmesg noise"")
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Oh well, agreed it's time to give up :(

Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> ---
>  drivers/gpu/drm/i915/i915_irq.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 3f8c753997ba..fa8afa7860ae 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -2414,9 +2414,13 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg)
>  				spt_irq_handler(dev, pch_iir);
>  			else
>  				cpt_irq_handler(dev, pch_iir);
> -		} else
> -			DRM_ERROR("The master control interrupt lied (SDE)!\n");
> -
> +		} else {
> +			/*
> +			 * Like on previous PCH there seems to be something
> +			 * fishy going on with forwarding PCH interrupts.
> +			 */
> +			DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n");
> +		}
>  	}
>  
>  	I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
> -- 
> 2.1.4
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch