sgx module build problem - Beagle Board

Message from discussion sgx module build problem

Jason Kridner

More options Feb 13, 8:22 am

From: Jason Kridner <jkrid...@beagleboard.org>

Date: Fri, 13 Feb 2009 07:22:39 -0600

Local: Fri, Feb 13 2009 8:22 am

Subject: Re: [beagleboard] Re: sgx module build problem

  Reply to author
  |
  Forward
  | Print
  | View thread
  | Show original
  | Report this message
  | Find messages by this author
  

On Feb 13, 2009, at 4:41 AM, TK, Pratheesh Gangadhar wrote:

>> -----Original Message-----
>> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com
>> ]
>> On Behalf Of Koen Kooi
>> Sent: Friday, February 13, 2009 1:03 AM
>> To: beagleboard@googlegroups.com
>> Subject: [beagleboard] Re: sgx module build problem

>> Op 12 feb 2009, om 20:29 heeft Geof Cohler het volgende geschreven:

>>> Hi,

>>> I'm seeing the same thing re: vertical discontinuity down the
>>> center
>>> of the screen. I'm running 1024x768MR-16@60.

>>> Plus, I have another demo that is running significantly slower (4x
>>> or
>>> so) than it does with the TI kernel.

>> There's a theory that with 2.6.28 the sgx only runs at halfspeed due
>> to changes in the kernel clock framework. I haven't bothered spending
>> time on it since clock handling is being redone. If someone wants to
>> look into this great, but it might be better to wait till Paul and
>> Russel finish getting the patches upstream (probably 2.6.30).

> We just checked this by reading back CM_CLKSEL_SGX (0x48004b40)
> register after loading PVR modules. ./devmem2 0x48004b40 returns 2.

> So this means SGX FCLK = 332/6 = 55 MHz. This is definitely a bug in
> clock framework.

> ./devmem2 0x48004b40 w 0 forces SGX FCLK to 110 MHz. You can notice
> demo fps approximately doubling

> Still vertical discontinuity is present in the output at XGA
> resolution (1024x768). Demos run well with 640x480MR-16@60 (close to
> 46 fps for Samurai demo).

> Regards,
> Pratheesh

The code, with the same issues mentioned here and below, is now
available for download at [1]. Look for
"OMAP35x_Graphics_SDK_setuplinux_3_00_00_06.bin". Do not use the .ipk
files within this package.

General summary of status in this release (3.00.00.06):
* Now working with the 2.6.28 Angstrom kernel built with OpenEmbedded.
* Clocking problem exists as described above where the SGX is running
at 1/2 speed.
* The "flipbuffer" is not used, so performance is degraded and there
are tearing artifacts.
* There aren't .ipk files that can be used directly, instead you must
run OE to create the libgles-omap3_3.00.00.06-r5.1_armv7a.ipk for you.
* Some demos have truncated binaries.

[1] https://www-a.ti.com/downloads/sds_support/targetcontent/dvsdk/oslinu...

>> regards,

>> Koen

>>> Still playing around though.

>>> Geof

>>> On Feb 11, 3:46 pm, PaulG <pjge...@hotmail.com> wrote:
>>>> I've got the SDK SGX demo's running. I notice though that there are
>>>> some issues. I am running with a 720p60-16 resolution and at this
>>>> resoloution there is a noticeable tearing of the screen exactly
>>>> down
>>>> the middle. Some of the demo's are also stuttering as if there is a
>>>> bandwidth issue.

>>>> I've not tried it at a lower resolution yet, so problem could be
>>>> general.

>>>> The 'Particles' demo shows this problem nicely - and in fact really
>>>> slows down badly. I think the demo runs slower and slower the
>>>> longer
>>>> it remains running. Its probably not a bandwidth issue then, but
>>>> something else.

>>>> At least it works though!!

>>>> Paul

>>>> On Feb 11, 1:35 pm, Koen Kooi <k...@beagleboard.org> wrote:

>>>>> Op 11 feb 2009, om 14:24 heeft Geof Cohler het volgende
>>>>> geschreven:

>>>>>> Hi,

>>>>>> Looks like I need something else that I'm missing. I thought
>>>>>> that the
>>>>>> PVR kernel drivers were included now.

>>>>>> root@beagleboard:~/SGX_Packages# opkg install ./libgles-
>>>>>> omap3_3.00.00.06-r0.1_be
>>>>>> agleboard.ipk
>>>>>> Installing libgles-omap3 (3.00.00.06-r0.1) to root...

>>>>> libgles ..06 is up to r5.1 now and pull in the omap3-sgx-modules
>>>>> package from the angstrom feeds automatically.

>>>>> regards,

>>>>> Koen

>>>>> PGP.sig
>>>>> < 1KViewDownload

Reply to author Forward