linux-kernel - Re: [PATCH v2 00/11] media: cedrus: Format handling improvements and 10-bit HEVC support

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Date:   Fri, 4 Nov 2022 16:31:09 +0100
From:   Hans Verkuil <hverkuil-cisco@...all.nl>
To:     Jernej Skrabec <jernej.skrabec@...il.com>, mripard@...nel.org,
        paul.kocialkowski@...tlin.com
Cc:     mchehab@...nel.org, gregkh@...uxfoundation.org, wens@...e.org,
        samuel@...lland.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/11] media: cedrus: Format handling improvements and
 10-bit HEVC support

Hi Jernej,

On 02/11/2022 19:07, Jernej Skrabec wrote:
> While my first intention was to just add 10-bit HEVC handling, I noticed
> a few format handling issues and a bit of redundancy in some cases. Final
> result is that driver now sticks to stateless decoder rules better.
> 
> Format handling improvements:
> 1. Default format selection is now based on HW capabilities. Before, MPEG2
>    was hardcoded but some Cedrus variants don't actually support it.
> 2. Controls are registered only if related codec is supported by HW.
> 3. Untiled output format is preferred, if supported, over tiled one. All
>    display engine cores support untiled format, but only first generation
>    supports tiled one.
> 
> I hope this makes Cedrus eligible for destaging.
> 
> Best regards,
> Jernej
> 
> Changes from v1:
> - collected acks, except for patch 5, which was changed
> - use cedrus_is_capable() for cedrus_find_format() too (patch 4)
> - tightly pack control pointers in ctx->ctrls[] (patch 5)
> 
> Jernej Skrabec (11):
>   media: cedrus: remove superfluous call
>   media: cedrus: Add format reset helpers
>   media: cedrus: use helper to set default formats
>   media: cedrus: Add helper for checking capabilities
>   media: cedrus: Filter controls based on capability
>   media: cedrus: set codec ops immediately
>   media: cedrus: Remove cedrus_codec enum
>   media: cedrus: prefer untiled capture format
>   media: cedrus: initialize controls a bit later

I'm going to merge the first 9 patches, but leave out the last
two. It's weird what happens there, and I think those two need a
bit more work.

Regards,

	Hans

>   media: cedrus: Adjust buffer size based on control values
>   media: cedrus: h265: Support decoding 10-bit frames
> 
>  drivers/staging/media/sunxi/cedrus/cedrus.c   | 102 +++++----
>  drivers/staging/media/sunxi/cedrus/cedrus.h   |  22 +-
>  .../staging/media/sunxi/cedrus/cedrus_dec.c   |   4 +-
>  .../staging/media/sunxi/cedrus/cedrus_h264.c  |   2 +-
>  .../staging/media/sunxi/cedrus/cedrus_h265.c  |  37 +++-
>  .../staging/media/sunxi/cedrus/cedrus_hw.c    |  18 +-
>  .../staging/media/sunxi/cedrus/cedrus_hw.h    |   2 +-
>  .../staging/media/sunxi/cedrus/cedrus_mpeg2.c |   2 +-
>  .../staging/media/sunxi/cedrus/cedrus_regs.h  |  16 ++
>  .../staging/media/sunxi/cedrus/cedrus_video.c | 200 ++++++++++--------
>  .../staging/media/sunxi/cedrus/cedrus_video.h |   2 +
>  .../staging/media/sunxi/cedrus/cedrus_vp8.c   |   2 +-
>  12 files changed, 244 insertions(+), 165 deletions(-)
> 
> --
> 2.38.1
>