From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
To: Alex Courbot <acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Mark Zhang <markz-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Thierry Reding
<thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org>,
"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH v3] ARM: tegra: ventana: enable internal display
Date: Mon, 19 Nov 2012 22:08:20 -0700 [thread overview]
Message-ID: <50AB1044.5030704@wwwdotorg.org> (raw)
In-Reply-To: <6034130.4mMqBdPRel@percival>
On 11/19/2012 06:47 PM, Alex Courbot wrote:
> On Tuesday 20 November 2012 09:37:41 Mark Zhang wrote:
>> Great. So this means I2C2 is used for LCD and HDMI both. While HDMI is
>> not plugged, the EDID of LCD will be checked out, right?
>
> Ahhh. So that's why the LCD DDC was not working during my previous tests - I
> had HDMI nodes in my DT as well as the HDMI cable plugged! Indeed, things seem
> to work as you described. I assumed the i2cmux node would set the right pin
> configuration according to whether we want to read the LCD or HDMI DDC, but
> apparently this is not totally working yet. Glad we figured it out. Adding the
> HDMI nodes to Ventana will probably require to fix this (along with other
> things, probably) first.
That is kinda the whole point of the I2C mux... If it really isn't
working, can you please investigate why. i2cdump or i2cget would be
useful tools for testing this.
next prev parent reply other threads:[~2012-11-20 5:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-19 9:43 [PATCH v3] ARM: tegra: ventana: enable internal display Alexandre Courbot
[not found] ` <1353318187-26484-1-git-send-email-acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-11-20 1:37 ` Mark Zhang
[not found] ` <50AADEE5.2030302-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-11-20 1:47 ` Alex Courbot
2012-11-20 5:08 ` Stephen Warren [this message]
[not found] ` <50AB1044.5030704-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-11-20 5:11 ` Alex Courbot
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