RPi 2 with 7-inch touchscreen.

[Mark R V Murray]

> On 28 Mar 2016, at 13:57, Emmanuel Vadot <manu at bidouilliste.com> wrote:
> Hi,
> 
> I'm not sure that we support it, from what I understand the official screen seems to use i2c for the touchscreen part (via the FT5406 IC).
> Could you run "i2c -s" on the different i2c busses to see if the chip answers ?

I see nothing on bus scans of /dev/iic[01], nut I know that I2C works as I can talk to other I2C devices (not connected at the moment).

What is more important is video; the "touch" aspect can wait.

M

> 
> Thanks,
> 
> On Mon, 28 Mar 2016 13:44:36 +0100
> Mark R V Murray <markm at FreeBSD.org> wrote:
> 
>> 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=1
>> or
>> hdmi_force_hotplug=1
>> or
>> #hdmi_safe=1
>> or
>> hdmi_ignore_edid=0xa5000080
>> hdmi_drive=2
>> hdmi_group=2
>> hdmi_mode=28
>> 
>> ... 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
>> 
> 
> 
> --
> Emmanuel Vadot <manu at bidouilliste.com>
> 

--
Mark R V Murray

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