linux-kernel - Re: [PATCH 2/9] drm/i915/intel_i2c: assign HDMI port D to pin pair 6

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Date:	Wed, 07 Mar 2012 13:23:06 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Daniel Kurtz <djkurtz@...omium.org>,
	Keith Packard <keithp@...thp.com>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:	Yufeng Shen <miletus@...omium.org>,
	Benson Leung <bleung@...omium.org>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Sameer Nanda <snanda@...omium.org>
Subject: Re: [PATCH 2/9] drm/i915/intel_i2c: assign HDMI port D to pin pair 6

On Wed,  7 Mar 2012 19:50:43 +0800, Daniel Kurtz <djkurtz@...omium.org> wrote:
> According to i915 documentation [1], "Port D" (DP/HDMI Port D) is
> actually gmbus pin pair 6 (gmbus0.2:0 == 110b GPIOF), not 7 (111b).
> Pin pair 7 is a reserved pair.
> 
> [1] Documentation for [DevSNB+] and [DevIBX], as found on
> http://intellinuxgraphics.org

The problem is I took those definitions from the gen2 specs, and munged
in the obvious changes with gen3... And it appears that the GPIO pin
assignment versus GMBUS has changed over the years. And so the can of
worms is opened!
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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