linux-kernel - RE: [i915]] *ERROR* mismatch in scaler_state.scaler

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Message-ID: <76A9B330A4D78C4D99CB292C4CC06C0E36FC8AC7@fmsmsx101.amr.corp.intel.com>
Date:	Fri, 8 May 2015 01:27:01 +0000
From:	"Konduru, Chandra" <chandra.konduru@...el.com>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
CC:	Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...ux.ie>,
	"Vetter, Daniel" <daniel.vetter@...el.com>,
	"intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [i915]] *ERROR* mismatch in scaler_state.scaler_id

> -----Original Message-----
> From: Sergey Senozhatsky [mailto:sergey.senozhatsky@...il.com]
> Sent: Thursday, May 07, 2015 4:24 AM
> To: Konduru, Chandra
> Cc: Daniel Vetter; Sergey Senozhatsky; David Airlie; Vetter, Daniel; intel-
> gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-
> kernel@...r.kernel.org
> Subject: Re: [i915]] *ERROR* mismatch in scaler_state.scaler_id
> 
> On (05/07/15 00:40), Konduru, Chandra wrote:
> >
> > Hi,
> > This error happens when crtc_state in driver not matching with hardware
> registers.
> > On skylake board that I have, I am not able to reproduce the issue.
> > Can you send the system configuration and steps to reproduce the issue?
> > Also can you send the full dmesg.log file?
> >
> 
> Hi,
> there are no specific steps, happens during boot and every time the screen goes
> unblank. attached dmesg, .config.
> 
OK, I am able reproduce the mismatch scaler id log on HSW system.
Though, this log doesn't affect system functionality, but it is an unnecessary
annoyance. This check is targeted for SKL and shouldn't happen for HSW.
Submitted a patch to limit the check for skl+:
http://patchwork.freedesktop.org/patch/48858/

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