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media: cec: extron-da-hd-4k-plus: add the Extron DA HD 4K Plus CEC driver

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Add support for the Extron DA HD 4K Plus series of 4K HDMI
Distrubution Amplifiers (aka HDMI Splitters).

These devices support CEC and this driver adds support for the
CEC protocol for both the input and all outputs (2, 4 or 6 outputs,
depending on the model).

It also exports the EDID from the outputs and allows reading and
setting the EDID of the input.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Hans Verkuil 2021-10-06 13:29:30 +02:00 • committed by Mauro Carvalho Chehab
commit 056f2821b6
10 changed files with 2780 additions and 0 deletions
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