From: Greg KH <greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
To: Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org>
Cc: Dave Airlie <airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
stable <stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org"
<nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
Subject: Re: v4.12 backport request: 13a86519202 (drm/nouveau/i2c/gf119-: add support for address-only transactions)
Date: Mon, 4 Sep 2017 13:19:18 +0200 [thread overview]
Message-ID: <20170904111918.GA9450@kroah.com> (raw)
In-Reply-To: <CAKb7UviPvnF_VuffWJW3HAXN66Jv4617On2-cC8qqho0suop6g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Sun, Sep 03, 2017 at 11:46:57AM -0400, Ilia Mirkin wrote:
> Commit df8dc97cd17 (drm/nouveau/kms/nv50: use drm core i2c-over-aux
> algorithm) switched things over to the drm algo. Unfortunately it
> generates address-only transactions. Prior to GF119, the hardware had
> no support for such things, and GF119+ the nouveau code did not handle
> these properly.
>
> The result of this bug is that EDID doesn't make it over for DP (and
> eDP) screens, which in turn wreaks all sorts of havoc. There have been
> lots of reports on IRC, a few on mailing lists, and also:
>
> https://bugs.freedesktop.org/show_bug.cgi?id=102528
>
> Commit 13a86519202 (drm/nouveau/i2c/gf119-: add support for
> address-only transactions) fixes the nouveau support for such
> transactions on GF119+ and flips things back over to the custom algo
> for earlier chips. Please include into the next v4.12.x release:
Now queued up, thanks.
greg k-h
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WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <greg@kroah.com>
To: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: stable <stable@vger.kernel.org>, Ben Skeggs <bskeggs@redhat.com>,
Dave Airlie <airlied@redhat.com>,
"nouveau@lists.freedesktop.org" <nouveau@lists.freedesktop.org>
Subject: Re: v4.12 backport request: 13a86519202 (drm/nouveau/i2c/gf119-: add support for address-only transactions)
Date: Mon, 4 Sep 2017 13:19:18 +0200 [thread overview]
Message-ID: <20170904111918.GA9450@kroah.com> (raw)
In-Reply-To: <CAKb7UviPvnF_VuffWJW3HAXN66Jv4617On2-cC8qqho0suop6g@mail.gmail.com>
On Sun, Sep 03, 2017 at 11:46:57AM -0400, Ilia Mirkin wrote:
> Commit df8dc97cd17 (drm/nouveau/kms/nv50: use drm core i2c-over-aux
> algorithm) switched things over to the drm algo. Unfortunately it
> generates address-only transactions. Prior to GF119, the hardware had
> no support for such things, and GF119+ the nouveau code did not handle
> these properly.
>
> The result of this bug is that EDID doesn't make it over for DP (and
> eDP) screens, which in turn wreaks all sorts of havoc. There have been
> lots of reports on IRC, a few on mailing lists, and also:
>
> https://bugs.freedesktop.org/show_bug.cgi?id=102528
>
> Commit 13a86519202 (drm/nouveau/i2c/gf119-: add support for
> address-only transactions) fixes the nouveau support for such
> transactions on GF119+ and flips things back over to the custom algo
> for earlier chips. Please include into the next v4.12.x release:
Now queued up, thanks.
greg k-h
next prev parent reply other threads:[~2017-09-04 11:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-03 15:46 v4.12 backport request: 13a86519202 (drm/nouveau/i2c/gf119-: add support for address-only transactions) Ilia Mirkin
2017-09-03 15:46 ` Ilia Mirkin
2017-09-03 22:56 ` [Nouveau] " rosenp
[not found] ` <CAKb7UviPvnF_VuffWJW3HAXN66Jv4617On2-cC8qqho0suop6g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-09-04 11:19 ` Greg KH [this message]
2017-09-04 11:19 ` Greg KH
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