[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20171204193001.dduxkafufgpeexk2@aura.draconx.ca>
Date: Mon, 4 Dec 2017 14:30:01 -0500
From: Nick Bowler <nbowler@...conx.ca>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Archit Taneja <architt@...eaurora.org>,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Dave Airlie <airlied@...hat.com>,
Andrzej Hajda <a.hajda@...sung.com>
Subject: Re: PROBLEM: Asus C201 video mode problems on HDMI hotplug
(regression)
Hi,
On 2017-12-04 21:06 +0200, Laurent Pinchart wrote:
> As you reported that the PLL lock failure message is not printed, the
> failure can only come from either the extra delay introduced by the
> above loop, or from reading the HDMI_PHY_STAT0 register.
>
> How many iterations of the for loop execute before the condition
> becomes true?
Judging from the log posted elsethread (where I added extra printouts),
it seems to consistently become true on the second iteration.
I will try to rule out read side effects by replacing the polling loop
with an unconditional delay.
Cheers,
--
Nick Bowler
Powered by blists - more mailing lists