linux-kernel - Re: OMAP4 HDMI PHY bug work-around for stable

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Message-ID: <20120228164702.GB11021@kroah.com>
Date:	Tue, 28 Feb 2012 08:47:02 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Tomi Valkeinen <tomi.valkeinen@...com>
Cc:	stable@...nel.org, stable@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: OMAP4 HDMI PHY bug work-around for stable

On Tue, Feb 28, 2012 at 10:03:13AM +0200, Tomi Valkeinen wrote:
> Hi,
> 
> I haven't seen these merged nor any comment for these. Perhaps
> stable@...nel.org was wrong address, so adding stable@...r.kernel.org
> too.

Yes, stable@...nel.org has been "dead" since last October.

> I have added one additional fix into for-3.2-stable branch, which fixes
> a problem with panel detection that the GPIO changes brought.

Sorry, but I don't accept pull requests.  I need patches in email form,
as described in the file, Documentation/stable_kernel_rules.txt.  Please
feel free to send them from your git tree that way.

> On Thu, 2012-02-09 at 13:44 +0200, Tomi Valkeinen wrote:
> > Hi,
> > 
> > There is a hardware bug on OMAP4, which may cause the HDMI output to
> > break irreversibly. A work-around for the bug has been merged into
> > mainline, but is missing from stable.
> > 
> > I've backported the necessary patches on top of 3.0, 3.1 and 3.2 stable
> > trees, and pushed the following branches to:

3.1 is long dead, so I can't do anything with those patches, sorry.

> > git://gitorious.org/linux-omap-dss2/linux.git
> > 
> > fixes/for-3.0-stable
> > fixes/for-3.1-stable
> > fixes/for-3.2-stable
> > 
> > 3.0 and 3.1 branches additionally contain a patch "OMAP: DSS2: HDMI: use
> > default dividers", which fixes a problem with the HDMI clock divider.
> > Without that the HDMI output won't start at all on those versions.
> > 
> > The branches contain the following backported patches:
> > 
> >       OMAP: DSS2: HDMI: use default dividers
> >       OMAP: 4430SDP/Panda: use gpio_free_array to free HDMI gpios
> >       OMAP: 4430SDP/Panda: rename HPD GPIO to CT_CP_HPD
> >       OMAPDSS: remove wrong HDMI HPD muxing
> >       OMAP: 4430SDP/Panda: setup HDMI GPIO muxes
> >       OMAP: 4430SDP/Panda: add HDMI HPD gpio
> >       OMAPDSS: HDMI: PHY burnout fix
> > 
> > Of those, the actual fix is in the last one, but as the GPIOs for HDMI
> > were a mess, they needed some cleanup patches before the fix could be
> > made.

That seems like a lot of backporting for a single fix, but I'll be glad
to review them when you send them.

> > I'm not familiar with the process with stable kernels, so are the
> > branches above fine to get them merged? Or should I send the patches
> > with git-send-email?

Again, please read Documentation/stable_kernel_rules.txt, it explains
how this all works.

thanks,

greg k-h
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