From: Shirish S <s.shirish@samsung.com>
Date: Thu, 30 Aug 2012 07:04:06 +0000 (+0000)
Subject: drm: edid: add support for E-DDC
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~20^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd004b3f4cd4169815c82bf9e424fda06978898a;p=pandora-kernel.git

drm: edid: add support for E-DDC

The current logic for probing ddc is limited to
2 blocks (256 bytes), this patch adds support
for the 4 block (512) data.

To do this, a single 8-bit segment index is
passed to the display via the I2C address 30h.
Data from the selected segment is then immediately
read via the regular DDC2 address using a repeated
I2C 'START' signal.

Signed-off-by: Shirish S <s.shirish@samsung.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

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