UVD status on loongson 3a platform

[Alex Deucher]

On Fri, Apr 19, 2013 at 4:51 AM, 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?

Early UVD 2 chips like RS780/880 and RV770 are not yet supported due
to differences in the UVD hardware compared to later generations.  We
are currently looking into supporting UVD on those chips in open
source, but nothing is available yet.

Alex