[Help][RS780E][mipsel]Screen corruption sometimes

Chen Jie chenj at lemote.com
Thu Aug 4 01:59:41 PDT 2011


Thanks for the reply.

2011/8/4 Michel Dänzer <michel at daenzer.net>:
> On Don, 2011-08-04 at 14:46 +0800, Chen Jie wrote:
>> We're running RS780E on a MIPS64 compatible platform, and encounter
>> screen corruption sometimes:
>>  * Do 'x11perf -compwinwin500' -- Window decoration and the background
>> corrupt (http://dev.lemote.com/files/upload/software/temp/x11perf-corrupt.png)
>>  * Hardware Accelerated video playback(video-pipe branch of mesa) --
>> both playback and the desktop:
>>   - http://dev.lemote.com/files/upload/software/temp/newmobcal1920-playback.png
>>   - http://dev.lemote.com/files/upload/software/temp/newmobcal1920-desktop-corrupt.png
>>   - Related thread:
>> http://lists.freedesktop.org/archives/mesa-dev/2011-August/010064.html
> The video decoding corruption may be due to the pipe-video code not
> working properly on all hardware yet.
> The rest looks like more or less random BO corruption.
The x11perf test causes the corruption each time.

>> Any idea? (BTW, don't know if related, but the bandwidth of separated
>> video ram is really low, about 14MB/s for write op)
> How do you measure it?
mmap the VRAM and write to it. Attachment is the test code.

- Chen Jie
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