From: Peter Clifton <pcjc2@cam.ac.uk>
To: Adam Jackson <ajax@redhat.com>
Cc: "intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
Stable Team <stable@kernel.org>
Subject: Re: [PATCH 1/4] drm/i915: Configure the TV sense state correctly on GM45 to make TV detection reliable
Date: Wed, 21 Apr 2010 20:59:08 +0100 [thread overview]
Message-ID: <1271879948.3617.1.camel@pcjc2lap> (raw)
In-Reply-To: <1271862548.32382.17242.camel@atropine.boston.devel.redhat.com>
On Wed, 2010-04-21 at 11:09 -0400, Adam Jackson wrote:
> But I really don't see how, short of a really really bad hardware bug,
> turning a subsystem _off_ would make that subsystem work.
Not knowing how the HW works, I'm only guessing.. but the Intel driver
is using a polling based method to detect TV-out, not the state-change
interrupt based method.
It is (just) possible that the state-change detection logic is separate
to that used for polling the status, and the two are conflicting. Some
hardware guys at Intel will probably have to confirm this.
--
Peter Clifton
Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA
Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)
next prev parent reply other threads:[~2010-04-21 20:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1270631482-30282-1-git-send-email-zhenyuw@linux.intel.com>
[not found] ` <1270631482-30282-2-git-send-email-zhenyuw@linux.intel.com>
[not found] ` <87hbnkqqey.fsf@pollan.anholt.net>
2010-04-21 8:46 ` [PATCH 1/4] drm/i915: Configure the TV sense state correctly on GM45 to make TV detection reliable ykzhao
2010-04-21 15:09 ` Adam Jackson
2010-04-21 19:59 ` Peter Clifton [this message]
2010-04-22 1:13 ` ykzhao
[not found] ` <1270631482-30282-5-git-send-email-zhenyuw@linux.intel.com>
[not found] ` <87eiioqq20.fsf@pollan.anholt.net>
2010-04-26 6:11 ` [PATCH 4/4] drm/i915: Ignore LVDS EDID when it is unavailabe or invalid ykzhao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1271879948.3617.1.camel@pcjc2lap \
--to=pcjc2@cam.ac.uk \
--cc=ajax@redhat.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=stable@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.