[Intel-gfx] [PATCH 1/2] drm/i915: fix the SDE irq dmesg warnings properly

[Chris Wilson]

On Wed, Nov 25, 2015 at 04:47:22PM +0200, Jani Nikula wrote:
> We had the "The master control interrupt lied (SDE)!" check and error
> message in place for a long time without any problems, until
> 
> commit aaf5ec2e51ab1d9c5e962b4728a1107ed3ff7a3e
> Author: Sonika Jindal <sonika.jindal at intel.com>
> Date:   Wed Jul 8 17:07:47 2015 +0530
> 
>     drm/i915: Handle HPD when it has actually occurred
> 
> caused the errors to start happening. This was bisected and reported,
> but the error message was silenced in
> 
> 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
> 
> shooting the messenger while the debugging for why Sonika's commit
> triggered the errors was still in progress.
> 
> It looks like we need to read and acknowledge the PCH_PORT_HOTPLUG
> register even though the hotplug trigger indicates there isn't a hotplug
> irq to handle.
> 
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Sonika Jindal <sonika.jindal at intel.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92084
> Fixes: aaf5ec2e51ab ("drm/i915: Handle HPD when it has actually occurred")
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

And to you I say:

[    4.249930] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.251037] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.251403] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.252141] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.252509] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.253247] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.253616] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.253985] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.254724] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.255460] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.256198] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.256567] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.257305] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.258043] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.258781] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.259519] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.259889] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.260626] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.261365] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.261734] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.262103] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.262163] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.263261] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.263999] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.264737] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.265106] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!
[    4.266214] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!

i7-5557U nuc currently connected to HDMI.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre