ARM: dts: Disable HDMI CEC internal pull-ups
authorTony Lindgren <tony@atomide.com>
Tue, 27 Jun 2017 08:58:32 +0000 (01:58 -0700)
committerTony Lindgren <tony@atomide.com>
Mon, 14 Aug 2017 18:34:23 +0000 (11:34 -0700)
commit3a8ed20db88923988640d64ff47da2a07c5c1063
treef0786d7c4e23596e31815dc50e6151022c41775d
parent092976edc54119f1b3b8501318a9b161a03dd226
ARM: dts: Disable HDMI CEC internal pull-ups

Devices using an external encoder, ESD protection and level shifter
such as tpd12s015 or ip4791cz12 have the CEC pull in the encoder
chip. And on var-som-om44, there is external pull up resistor R30.

So the internal CEC pull-up resistor needs to be disabled as otherwise
the external and internal pull are parallel making the pull value
much smaller than intended. This leads into the CEC not working as
reported by Hans Verkuil <hverkuil@xs4all.nl>.

Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Cc: Dmitry Lifshitz <lifshitz@compulab.co.il>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
arch/arm/boot/dts/omap4-droid4-xt894.dts
arch/arm/boot/dts/omap4-duovero-parlor.dts
arch/arm/boot/dts/omap4-panda-common.dtsi
arch/arm/boot/dts/omap4-sdp-es23plus.dts
arch/arm/boot/dts/omap4-sdp.dts
arch/arm/boot/dts/omap4-var-om44customboard.dtsi
arch/arm/boot/dts/omap5-board-common.dtsi
arch/arm/boot/dts/omap5-cm-t54.dts