#linux-sunxi on 2019-05-11 — irc logs at freenode.irclog.whitequark.org

2018-08-03 10:18 rellla changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi - *only registered users can talk*

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02:06 <wens> check drivers/tty and drivers/tty/serial?

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03:32 <ndufresne> paulk-leonov, while trying the v4l2_request VA driver, I decided to first try on cedrus, but I get EBUSY on an S_FMT in RequestCreateSurfaces2

03:33 <ndufresne> (I tried ffmpeg and gstreamer so far)

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21:09 <ndufresne> paulk-leonov, so I started fixing now, RequestCreateSurfaces2 won't set the format and fail on second call

21:10 <ndufresne> turns out GStreamer calls this with surfaces_count to 1, in a loop of N, it's not even doing run-time allocation, just silly code

21:11 <ndufresne> the VA driver is not super smart though, it calls into te driver for everything, instead of keeping track of

21:11 <ndufresne> that's a lot of ioctl() per frames

21:12 <ndufresne> what I'm thinking is that a lot of this could be filled into driver_data after the driver is open

21:12 <ndufresne> (like the available format, but then we could also save the current informat instead of calling G_FMT over and over again)

21:13 <ndufresne> we also make no use of the queues, but that seems like a VAAPI limitation

21:14 <ndufresne> because you must provide a frame on end_frame() call

21:14 <ndufresne> ffmpeg got the same limitation

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22:23 <ndufresne> paulk-leonov, ok, I got "something" being decoded now, bottom half of the luma seems right

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23:58 <ndufresne> paulk-leonov, lol, we do "image_object->image = *image;" and after that we set the stride ;-P

23:58 <ndufresne> and offsets

23:58 <ndufresne> DeriveImage was likely not tested ;-P