Re: Right lib-imx/firmware-imx ... versions

[Jens Rehsack <rehsack@gmail.com>]

Am 23.07.2014 um 16:19 schrieb Daiane Angolini <daiane.list@gmail.com>:

> On Tue, Jul 22, 2014 at 2:24 AM, Jens Rehsack <rehsack@gmail.com> wrote:
>> Hi,
>> 
>> as mentioned in my very first post here, we're trying to get a board
>> running with yocto with a bsp for linux-imx-3.0.35_4.1.0 (bdde708).
>> 
>> As firmware-imx we have 3.0.35_4.0.0 (tried 3.10.17, too - without
>> difference).
> 
> Long story short: Stick to one branch and use it, with the kernel
> version and the imx-lib/gpu/imx-vpu/firmware version already there. It
> was what we tested someway.

But there is no Yocto support for imx-lib-3.0.35_4.1.0, neither that
imx-vpu nor gpu-viv-lib-mxq version. Only 3.10.9 and 3.10.17 is included
(daisy has only 3.10.17).

> Long story long:
> 
>> When we run xmbc with lib-imx, gpu-viv-ib-mx6q, lib-vpu in daisy
>> versions (3.10.17), xbmc immediately crashes with a segfault in
>> gpu-viv-ib-mx6q (does someone wants the trace?). Using Dora versions
>> (3.10.9) we can at least start xbmc and can start one movie. When
>> we play a second movie, the system crashes with "dma physical memory
>> allocation error" (trace/console output wanted?).
> 
> I don´t have previous success cases in running xbmc. I mean, I have
> never (myself) tried it, but in other hand, I have never heard about
> someone that had succeeded.

http://stephan-rafin.net/blog/ or more concrete: http://stephan-rafin.net/blog/2014/01/29/yet-another-yocto-image/

But as far as I see from his recipes, he's using mx6d.

> So, I don´t know if *any* combination works.
> 
>> The board manufacturer recommends we try the freescale libs (firmware,
>> lib-imx, gpu...) in precisely matching version (3.0.35_4.1.0), but none
>> of them seems to exist in meta-fsl-arm(-extra). That confuses me in the
>> way that I expect, the distributed versions are stable.
> 
> When dealing with GPU, is important that the kernel GPU driver and the
> GPU user-space package match.

As said, I have linux-imx-3.0.35_4.1.0 at revision bdde708 with patches
https://github.com/rehsack/meta-jens/tree/master/recipes-kernel/linux/linux-curie-3.0.35

Doesn't look to me as if any modifies GPU kernel driver ...

> When working with IPU for imx6. It does not matter what imx-lib you is
> working with. ipu-lib is not used for imx6 since 3.0.15, or something
> like that. So, for IPU, no user-space package needed.

k

> When working with VPU, imx-vpu is needed, and imx-firmware is needed.
> However, any should work, and what you miss from one to another is
> only bugfixes. (of course, it´s may be a huge difference, however I
> don´t see it causing a crash)

The crash I see with xbmc and 3.10.9 drivers (firmware-imx-3.0.35_4.0.0+
imx-lib-, imx-vpu- & gpu-viv-lib-mx6q-3.10.9_1.0.0) is nearly byte-identical
to https://community.freescale.com/thread/304414 ...

However, with gpu-viv-lib-mx6q (other versions doesn't seem to matter in
any way), it immediately crashes 

#0  0x2be582b0 in gcoHAL_QueryChipCount (Hal=Hal@entry=0x0,
   Count=Count@entry=0x1c3b65c) at gc_hal_user_query.c:1726
#1  0x2b275244 in veglGetThreadData () at gc_egl.c:137
#2  0x2b26e210 in eglfGetDisplay (display_id=0x1c2b568) at gc_egl_init.c:464
#3  eglGetDisplay (DisplayID=0x1c2b568) at gc_egl_init.c:565
#4  0x00880fac in CEGLWrapper::InitDisplay (this=0x1c16c40,
   display=display@entry=0x1a64e50) at EGLWrapper.cpp:206

which points to gpu-viv-lib-mx6q ...

>> Though I don't have a concrete question beside "what library versions
>> are good for us?" - any hints, resources to study, ...?
> 
> So, the question "what library version are good for us" should be
> answered by another question "do you need libraries?"

From available xbmc recipes I think so - but maybe the imx port isn't
the right way. OTOH, looks as if wolfgar did a good job there, at least
for wandboard, uitite & co.

> Or, let´s be more practical. Have you tested your GPU integration?
> What is the GPU driver version in your kernel, and your GPU user-space
> version?

Nope, how can I do that (fsl for dummies - I'm happy controlling Yocto
meanwhile). Just bitbake imx-test or something more?

Thanks in advance.

Best regards
-- 
Jens Rehsack
rehsack@gmail.com