linux-kernel - Re: [PATCH v6 5/6] media: rkvdec: Add the rkvdec driver

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Message-ID: <20200302153529.4e2429e7@collabora.com>
Date:   Mon, 2 Mar 2020 15:35:29 +0100
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Ezequiel Garcia <ezequiel@...labora.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Rob Herring <robh+dt@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>, kernel@...labora.com,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Jonas Karlman <jonas@...boo.se>,
        Heiko Stuebner <heiko@...ech.de>,
        Sakari Ailus <sakari.ailus@....fi>,
        Hans Verkuil <hverkuil@...all.nl>
Subject: Re: [PATCH v6 5/6] media: rkvdec: Add the rkvdec driver

On Mon, 2 Mar 2020 14:57:46 +0100
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:

> > +	for (j = 0; j < 3; j++) {  
> 
> Again a magic number. I guess this came from that big "M_N" table with 4
> elements, right? Please use a define instead of hardcoding a number
> here.

Nope, it's unrelated to the cabac_table size, it's related to how the
HW accesses the P/B reflists (there are 1 P reflist, and 2 B reflists,
hence the 3 here). I guess we can have a '#define NUM_REFLISTS 3'.