From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Henrik Rydberg" <rydberg@euromail.se>
Subject: Re: [PATCH v2 1/2] apple-gmux: Fix index read functions
Date: Sat, 25 Aug 2012 19:53:16 +0200
Message-ID: <20120825175316.GA4292@polaris.bitmath.org>
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To: Bernhard Froemel <bfroemel@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>, platform-driver-x86@vger.kernel.org, Seth Forshee <seth.forshee@canonical.com>, linux-kernel@vger.kernel.org, Bernhard Froemel <froemel@vmars.tuwien.ac.at>

On Sat, Aug 25, 2012 at 10:30:48AM +0200, Bernhard Froemel wrote:
> From: Bernhard Froemel <froemel@vmars.tuwien.ac.at>
> 
> Study of Apple's binary driver revealed that the GMUX_READ_PORT should
> be written between calls to gmux_index_wait_ready and
> gmux_index_wait_complete (i.e., the new index protocol must be
> followed). If this is not done correctly, the indexed
> gmux device only partially accepts writes which lead to problems
> concerning GPU switching. Special thanks to Seth Forshee who helped
> greatly with identifying unnecessary changes.
> 
> Signed-off-by: Bernhard Froemel <froemel@vmars.tuwien.ac.at>
> ---

Hi Bernhard,

thanks for your patch, this works splendidly; I can resume and select
different screen resolutions using xrandr.

    Tested-by: Henrik Rydberg <rydberg@euromail.se>

Henrik