System-On-Module

Thu Jan 29 13:00:48 UTC 2015

On Thu, Jan 29, 2015 at 5:27 PM, Lundberg, Johannes <
johannes at brilliantservice.co.jp> wrote:

> What I'm most worried about is the graphics stack.. Some companies don't
> seem so keen on handing out specs.

I think you can check some open source implementations for those GPU
related things (only for linux maybe):

For Vivante:
https://github.com/laanwj/etna_viv/wiki

For Adreno:
http://freedreno.github.io

For Mali:
http://limadriver.org

I guess they are mostly based on reverse engineering effort. I think you
can even ask about the statuses directly from the authors/maintainers on
some irc channel.

Not sure about Tegra or PowerVR.

Ganbold

>
>
> On Thursday, January 29, 2015, Ganbold Tsagaankhuu <ganbold at gmail.com>
> wrote:
>
>>
>>
>> On Thu, Jan 29, 2015 at 4:18 PM, Lundberg, Johannes <
>> johannes at brilliantservice.co.jp> wrote:
>>
>>> Hi All
>>>
>>> Thanks again for all the replies.
>>>
>>> How is the support for A15 and how is Qualcomm to work with when it comes
>>> to porting?
>>>
>>> Thinking about this guy which is closer to what I want spec-wise..
>>>
>>> http://www.variscite.com/products/system-on-module-som/cortex-a15-krait/var-som-sd600-cpu-qualcomm-snapdragon600
>>>
>>>
>>>
>> I think IFC6410 has same SoC as above SoM and as for ifc6410 either
>> mmc/sd or usb ehci driver needed in order to boot FreeBSD into multi user
>> mode.
>>
>> Ganbold
>>
>>
>>
>>>
>>> --
>>> Johannes Lundberg
>>> BRILLIANTSERVICE CO., LTD.
>>>
>>> On Thu, Jan 29, 2015 at 11:33 AM, Bernd Walter <ticso at cicely7.cicely.de>
>>> wrote:
>>>
>>> > On Wed, Jan 28, 2015 at 05:36:00PM -0700, Ian Lepore wrote:
>>> > > On Thu, 2015-01-29 at 09:12 +0900, Lundberg, Johannes wrote:
>>> > > > Ah now I see it has EDM connection. I didn't look carefully enough.
>>> > All the
>>> > > > images are with the expansion board attached..
>>> > > >
>>> > > > Spec-wise and portability-wise it seems like a good option but my
>>> > hardware
>>> > > > guy keeps warning me about Freescale that they often have hardware
>>> > bugs and
>>> > > > rather than fixing the bugs they pretend they are not there.. In
>>> other
>>> > > > words, Freescale is good for software developers because of open
>>> > > > documentation but not so for hardware manufactures. Any experiences
>>> > with
>>> > > > this?
>>> > >
>>> > > The imx6 manuals include an errata list, so it would be good to check
>>> > > that for anything specific that would matter to your projects.
>>> >
>>> > If you use a prebuild module then you don't get much in touch with
>>> > the freescale chip fropm the hardware side.
>>> > On the other hand, there are countless iMX6 boards out there with
>>> > schematics online.
>>> > My recently bought Novena even came with printed schematics and they
>>> > open sourced the HW design files as well.
>>> > I don't think there are hidden surprises on the hardware side.
>>> >
>>> > > For the devices we use in our products everything is good so far with
>>> > > the hardware.  That's emmc, sdcard, ethernet, i2c, uarts, usb, and
>>> lots
>>> > > of gpio (inputs and outputs).  The ethernet is gigabit but has a
>>> known
>>> > > limitation of 40MB/s due to the bus it's connected to in the chip.
>>> (But
>>> > > hey, it's documented so it's not a problem, right? :)
>>> > >
>>> > > You mentioned video, and we don't have that working on freebsd imx6
>>> yet,
>>> > > but there's not a ton of work to do.  There's a framebuffer driver
>>> for
>>> > > imx5 and it has pretty much the same framebuffer hardware.  Getting
>>> > > video output to a TTL LCD is probably just hours of work.  Getting
>>> it to
>>> > > an LVDS LCD or HDMI probably needs days of work (entire drivers
>>> written,
>>> > > potentially, I haven't looked into it).
>>> >
>>> > Sounds interesting for my Novena.
>>> > The one I already got are board only (with some FPGA breakout, ...).
>>> > They have HDMI though.
>>> > But I'm also awaiting for the one with case and LCD panel.
>>> > Not to forget that I have a fairy EDM carrier with LCD already.
>>> > That said I'v always wondered how much work is it to get the camera
>>> > interface running, since the Hummingboards can connect to the RPi
>>> > camera modules.
>>> >
>>> > > Some audio support was recently committed, but I don't know much
>>> about
>>> > > it yet.
>>> > >
>>> > > -- Ian
>>> > >
>>> > >
>>> >
>>> > --
>>> > B.Walter <bernd at bwct.de> http://www.bwct.de
>>> > Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
>>> >
>>>
>>> --
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>>
>>
>>
>
> --
> --
> Johannes Lundberg
> BRILLIANTSERVICE CO., LTD.
>
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> 秘密保持について：この電子メールは、名宛人に送信したものであり、秘匿特権の対象となる情報を含んでいます。
> もし、名宛人以外の方が受信された場合、このメールの破棄、およびこのメールに関する一切の開示、
> 複写、配布、その他の利用、または記載内容に基づくいかなる行動もされないようお願い申し上げます。
> ---
> CONFIDENTIALITY NOTE: The information in this email is confidential
> and intended solely for the addressee.
> Disclosure, copying, distribution or any other action of use of this
> email by person other than intended recipient, is prohibited.
> If you are not the intended recipient and have received this email in
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