Re: [PATCH v7 00/17] media: rkvdec: Add support for VDPU381 and VDPU383

[Piotr Oniszczuk <piotr.oniszczuk@gmail.com>]

> Wiadomość napisana przez Detlev Casanova <detlev.casanova@collabora.com> w dniu 19 gru 2025, o godz. 00:28:
> 
> These variants are found respectively in the RK3588 and RK3576 SoCs.
> This patch only adds support for H264 and H265 in both variants.
> 
> As there is a considerable part of the code that can be shared with the
> already supported rkvdec decoder driver, the support for these variants
> is added here rather than writing a new driver.
> 
> This patch set uses the newly introduced hevc_ext_sps_[ls]t_rps v4l2
> controls for HEVC.
> Therefore, a patched version of userpace tools is needed for HEVC
> support (added for GStreamer[1] and in an early stage for FFmpeg[2]).
> 
> The DTS changes can be found in another patch set: [3]
> 
> [1]: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9355
> [2]: https://gitlab.collabora.com/detlev/ffmpeg
> [3]: https://lore.kernel.org/all/20251020212009.8852-1-detlev.casanova@collabora.com/
> 

Detlev,

FYI:

In my testbed with 

i. v7 of [1] on mainline 6.18.2
ii ffmpeg8 v4l2_request [2]
iii. mythv as player [3]
iv. minimyth2 as distro [4]
v. NO applied yours ffmpeg sps/rps hinting [5] (as i'm on ffmpeg8)

I run set of my mpeg2/h264/hevc/vp8/vp9 samples on: rk3328. rk3399, rk3566, rk3576, rk3588 and h616 (just for brief test for potential cross-regressions)

Results:

a. rk3328: no any regressions; all samples are decoded ok

b. rk3399: no any regressions; all samples are decoded ok

c. rk3566: no any regressions (e.g. in vp9. v6 and older were regressing; v7 is ok)  
c.1 h264: all ok
c.2 hevc: samples without long-term sps/rps: all ok.
c.3 hevc: samples with long-tern sps/rps: v7 is a bit regressing here: it gives me sometimes kernel oops requiring hw. reset to bring decoder back to live. 
Exemplary oops: https://termbin.com/upju
Older vers of your code were handling such cases without needs of hw. reset

d. rk3576:
d.1: h264: works ok - but randomly i'm getting playback with distortions like this: https://postimg.cc/Yh8Djc3L. it is avd. 1 per few playbacks.
d.2: hevc: the same like c.1 and c.2

e. rk3588
e.1: h264: all ok
e.2: hevc: the same like c.1 and c.2
   
g. h616 with cedrus: all ok.

btw: 
Adding to [1] vp9 android code [6] offers me nice working vp9 hwdec accell on rk3566/3588.  

Great work!

[1] https://gitlab.collabora.com/detlev/linux/-/commits/add-vdpu381-and-383-to-rkvdec-v7
[2] https://code.ffmpeg.org/Kwiboo/FFmpeg/src/branch/v4l2-request-n8.0.1
[3] https://github.com/MythTV/mythtv
[4] https://github.com/warpme/minimyth2
[5] https://gitlab.collabora.com/detlev/ffmpeg
[6] https://github.com/dvab-sarma/android_kernel_rk_opi/commit/fd0b1b17cbdfcf0c15bc9f411cc7127105157e57