Re: System-On-Module

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。
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