Re: [PATCH 0/5] media: iris: HFI gen2 features and fixes for VA-API

[Nicolas Dufresne]

Le mardi 03 novembre 2026 à 23:00 +0100, Bryan O'Donoghue a écrit :
> On 29/10/2026 04:58, Xilin Wu wrote:
> > This series adds features and fixes to Iris HFI gen2 to support
> > qcom-va-driver [1], a userspace VA-API backend for the V4L2 stateful codec
> > interface.
> > 
> > It enables decode-order output and larger CAPTURE buffer pools for VA-API
> > clients, and exposes encoder deblocking controls. It also fixes
> > error-buffer timestamps and handling of non-display AV1 and VP9 pictures,
> > which affect both VA-API and direct V4L2 clients.
> > 
> > [1]https://github.com/radxa-pkg/qcom-va-driver
> 
> Is this code based on https://github.com/intel/libva and is there a 
> route to getting it into the upstream of that repository ?

libva is the runtime, qcom-va-driver is a driver, so that won't happen. Also,
qcom-va-drivers does all sort of guessing heuristic, bitstream crafting and the
readme show that it cost as much as 15% in throuput performance. Let's be
honest, this is a bit of hack, not really a solution. A proper stateless
firmware and driver would do a way better job and reduce complexity instead of
increasing it. The provided patches though seems to all have merit, matching
feature with venus, fixing bugs. A bit of spec work would not hurt though.

Nicolas

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