From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Furniss <adf.lists@gmail.com>
Subject: Re: [PATCH 5/5] drm/edid: Parse and handle HDMI deep color modes.
Date: Thu, 22 May 2014 15:49:21 +0100
Message-ID: <537E0E71.1060201@gmail.com>
References: <1400627871-18107-1-git-send-email-alexander.deucher@amd.com>
 <1400627871-18107-5-git-send-email-alexander.deucher@amd.com>
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To: Alex Deucher <alexdeucher@gmail.com>, dri-devel@lists.freedesktop.org
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Alex Deucher wrote:
> From: Mario Kleiner <mario.kleiner.de@gmail.com>
>
> Check the HDMI cea block for deep color mode bits. If available,
> assign the highest supported bpc for a hdmi display, corresponding
> to the given deep color modes.

I haven't had time to test further, but with all 5 applied on top of 
deathsimple drm-fixes I loose output to TV as soon as I startx.

It worked in fbcon before starting X, but not switching vt after.

My TV according to edid-decode does support deep colour.

Nothing obvious to see in dmesg/Xorg.0.log and xrandr --verbose looked 
like it was on, tried some different modes, but nothing.

R9 270X