linux-kernel - Re: [PATCH v2 13/20] drm/sun4i: tcon: Change vertical total size computation inconsistency

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Message-ID: <CAGb2v66U9JzEr_xeifZGd9ws4uhHnYJAvsY9zmPArHFzn9LztQ@mail.gmail.com>
Date:   Thu, 4 May 2017 11:58:45 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v2 13/20] drm/sun4i: tcon: Change vertical total size
 computation inconsistency

On Wed, May 3, 2017 at 7:59 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> Both TCON channels need to have the resolution doubled, since the size the
> hardware is going to use is whatever we put in the register divided by two.
>
> However, we handle it differently for the two channels: in the channel 0,
> our register access macro does the multiplication of the value passed as
> paremeter, while in the channel 1, the macro doesn't do this, and we need
> to do it before calling it.
>
> Make this consistent by aligning the channel 0 with the channel 1
> behaviour.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>

Acked-by: Chen-Yu Tsai <wens@...e.org>