linux-kernel - Re: [PATCH v4 0/4] drm: sun4i: set proper TCON0 DCLK rate in DSI mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 10 May 2023 06:30:04 +0200
From:   Frank Oltmanns <frank@...manns.dev>
To:     Roman Beranek <me@...y.cz>
Cc:     Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Icenowy Zheng <icenowy@...c.io>, Ondrej Jirman <megi@....cz>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/4] drm: sun4i: set proper TCON0 DCLK rate in DSI mode

Hello Roman,

On 2023-05-09 at 13:04:50 +0200, "Roman Beranek" <me@...y.cz> wrote:
> On Mon May 8, 2023 at 10:47 AM CEST, Frank Oltmanns wrote:
>> I played back a 60 fps video (10 seconds) and recorded the panel's
>> output with a 240 fps camera. I noticed only 2 dropped frames, that I
>> account to the imperfect data rate of 107.8MHz instead of 108 MHz due
>> to pll-video0's rate being 294MHz instead of the 297 MHz for reasons
>> I described in the thread on your v2 of this patch [4]).
>
> Yes. That's what should happen, right? Or do you report this as a
> defect?

Sorry, I didn't communicate more clearly. Without your patch, I'm losing
a number of frames in the realm of three digits. With your patch I only
lost 2 frames which is expetcted. Your patches are a big improvement.

This is the opposite of a defect report. :-)

Thanks,
  Frank

>
> Roman