UVD status on loongson 3a platform

[Huacai Chen]

Due to platform limitation, Loongson-3a use 16KB page, and X86 use 4KB
page, maybe this has some relationship with the video mosaic?


On Fri, Apr 19, 2013 at 4:51 PM, Chen Jie <chenj at lemote.com> wrote:

> Hi all,
>
> Recently, the uvd supporting is released, and we've tried it on
> loongson 3a platform.
> Brief introduction about loongson 3a, it's a MIPS III compatible, 4
> cores processor.
>
> More details about the platform [1]:
> * The Board: RS780E + SB710 chipset, with an AMD radeon HD6570 video card
> * The kernel is 64bits(n64 ABI), and the userland is 32bits(o32 ABI)
> * OS: LOonux 3.3.6 [2] + LTP-uvd-installer-20130419.bin [3]
> ** kernel: 3.9 + uvd related patches
> ** mesa: git master version (d0e9aa)
>
> We tried three video samples:
> * big_buck_bunny_1080p_h264.mov
> (
> http://mirrorblender.top-ix.org/peach/bigbuckbunny_movies/big_buck_bunny_1080p_h264.mov
> )
> * Sintel.2010.2K.x264-VODO.mp4
> (
> http://dev.lemote.com/files/upload/software/UVD-debug/Sintel.2010.2K.x264-VODO.mp4
> )
> * test.avi (http://dev.lemote.com/files/upload/software/UVD-debug/test.avi
> )
>
> For big_buck_bunny_1080p_h264.mov, the playback is not very fluent at
> the beginning, and it has some video mosaic. We've recorded a video
> for it, see
> http://dev.lemote.com/files/upload/software/UVD-debug/bbb-1080P.mp4
> For video mosaic, what could it be caused by?
>
> For Sintel.2010.2K.x264-VODO.mp4, it has a very long wait for the first
> frame.
> We've also recorded a video for it, see
> http://dev.lemote.com/files/upload/software/UVD-debug/sintel.2K.mp4
> Any idea about the long wait for the first frame?
>
> For test.avi(video: ITU H.264, 1920x1080), it's playing back
> perfectly! Thanks for the effort on UVD!
>
> In all of these tests, the CPU usage is around 50%, and all three
> video samples play well on X86 platform with the same video card.
>
> BTW, 785G also has UVD2.0, is it supported currently? Or will it be
> supported in the near future?
>
>
>
> Regards,
>
> Chen Jie
> ----
> [1] http://www.lemote.com/products/computer/fulong/348.html (zh_CN)
> [2] http://dev.lemote.com/653.html (zh_CN)
> [3] http://dev.lemote.com/663.html (zh_CN)
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