]> git.baikalelectronics.ru Git - kernel.git/commit
[media] adv7842: platform-data for Hotplug Active (HPA) manual/auto
authorMartin Bugge <marbugge@cisco.com>
Fri, 24 Jan 2014 13:50:06 +0000 (10:50 -0300)
committerMauro Carvalho Chehab <m.chehab@samsung.com>
Tue, 4 Feb 2014 11:57:36 +0000 (09:57 -0200)
commitf3896d8cfce288ab0e0444d2add8d62720258e13
tree2617bd11e1a9ec71be25d8c54f01cafdf08115d3
parent9869e2fa27b8327146773c930efe1588917d1dd8
[media] adv7842: platform-data for Hotplug Active (HPA) manual/auto

This applies to HDMI-map register 0x69.
So far we have been using HPA manual mode.
This way we had control of HPA which could be
set after EDID had been programmed.

Using a Mac Mini with mini-displayport to DVI-D converter as source
caused the adv7842 to lock up and fail to detect any further signals.

After experimenting with different configurations it was found that
using the HPA auto mode and in addition letting RX-termination
be controlled by HPA prevented this error from occuring.

I was not able to re-create this problem on the adv7604.

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
drivers/media/i2c/adv7842.c
include/media/adv7842.h