[meta-freescale] iMX6 VPU Dma allocation

[Mauro Ziliani]

Sorry.

The kernel il linux-imx.4.1.15

MZ

Il 16/11/18 15:22, Mauro Ziliani ha scritto:
> Hi all.
>
> I'm working with an imx6dl-sabresd derived board.
>
> Sometimes the video stop to work, even if I replay the same video many
> times.
>
> It happens that I play the video 10 times, and the 11th doesn't start
>
> The reason of this behaviour is due to a dma allocation fault in
> vpu_alloc_dma_buffer( drivers/mxc/vpu/mxc_vpu.c)
> This fault is generated because the system try to alloc 5238784 bytes
> for the DMA, and this space is not available.
> The video play is done with gstreamer1.0 and imx-gst1.0-plugin (from a
> QMediaPlayer 5.6.1).
>
> Why suddenly gstreamer try to alloc a buffer of 5M? (wich dma cannot
> manage due the fragmentation)
>
>
> To solve this matter I try to integrate this patch into mxc_vpu.c
>
> https://dev.sigmadrone.org/sigmadrone/linux-colibri/commit/7cbd06b2904c1855109084ca6b0c84990bc69233
>
>
> Any other solutions?
>
>
> Best regards,
>
>   MZ
>
>
>
>