linux-kernel - Re: [PATCH] drm/bridge/synopsys: dsi: use adjusted_mode in mode

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Message-ID: <CA+ASDXOLYaL1zT-K0FvVTFGQ2BA12eHkrZw_mau50aUBdy=vhA@mail.gmail.com>
Date:   Thu, 25 Jan 2018 14:47:21 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     Philippe Cornu <philippe.cornu@...com>
Cc:     Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Bhumika Goyal <bhumirks@...il.com>,
        dri-devel@...ts.freedesktop.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stubner <heiko@...ech.de>,
        linux-arm-kernel@...ts.infradead.org,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Yannick Fertre <yannick.fertre@...com>,
        Vincent Abriou <vincent.abriou@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Ludovic Barre <ludovic.barre@...com>,
        Mickael Reulier <mickael.reulier@...com>
Subject: Re: [PATCH] drm/bridge/synopsys: dsi: use adjusted_mode in mode_set

On Thu, Jan 25, 2018 at 7:55 AM, Philippe Cornu <philippe.cornu@...com> wrote:
> The "adjusted_mode" clock value (ie the real pixel clock) is more
> accurate than "mode" clock value (ie the panel/bridge requested
> clock value). It offers a better preciseness for timing
> computations and allows to reduce the extra dsi bandwidth in
> burst mode (from ~20% to ~10-12%, hw platform dependant).
>
> Signed-off-by: Philippe Cornu <philippe.cornu@...com>
> ---
> Note: This patch replaces "drm/bridge/synopsys: dsi: add optional pixel clock"

These two appear to be the same for my cases, but at least nothing breaks:

Tested-by: Brian Norris <briannorris@...omium.org>