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Date:      Mon, 28 Mar 2016 13:44:36 +0100
From:      Mark R V Murray <markm@FreeBSD.org>
To:        freebsd-arm <freebsd-arm@freebsd.org>
Subject:   RPi 2 with 7-inch touchscreen.
Message-ID:  <C03C0CD0-F135-4FF1-9F07-D1C73F46E5CF@FreeBSD.org>

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Hi Folks,

I have an RPi2 and I'm having some difficulties with the "official" =
7-inch touch-screen: =
https://www.raspberrypi.org/blog/the-eagerly-awaited-raspberry-pi-display/=


I know the touchscreen works, because it works with RaspBian. I can't =
get any activity out of it with FreeBSD, however.

I'm using FreeBSD-11-CURRENT, and the boot image is based on an =
11-CURRENT "official" download, but I added a very recent build of =
sysutils/u-boot-rpi2.

I can build CURRENT on the machine (using a USB SSD, manually mounted), =
and I made sure I had the latest RPI2.DTB file in the FAT partition.

The screen stays stubbornly OFF.

Here is the relevant extract of CONFIG.TXT:

hdmi_force_unplug=3D1
or
hdmi_force_hotplug=3D1
or
#hdmi_safe=3D1
or
hdmi_ignore_edid=3D0xa5000080
hdmi_drive=3D2
hdmi_group=3D2
hdmi_mode=3D28

... and I've tried a couple of combinations of the above with no luck. I =
can make an HDMI TV work, but not the inbuilt ribbon-cable interface.

I suspect the DTB file as FreeBSD's is much smaller than RaspBian's, but =
I'm not all that clued in that department.

Has anyone had any better luck than me?

M
--
Mark R V Murray


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