linux-kernel - Re: [PATCH v2 17/20] dt-bindings: display: sun4i: Add allwinner,tcon-channel property

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Message-ID: <20170508162443.faox4hm6jmfqccwt@rob-hp-laptop>
Date:   Mon, 8 May 2017 11:24:43 -0500
From:   Rob Herring <robh@...nel.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@...ts.freedesktop.org,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2 17/20] dt-bindings: display: sun4i: Add
 allwinner,tcon-channel property

On Wed, May 03, 2017 at 01:59:54PM +0200, Maxime Ripard wrote:
> The Allwinner Timings Controller has two, mutually exclusive, channels.
> When the binding has been introduced, it was assumed that there would be
> only a single user per channel in the system.
> 
> While this is likely for the channel 0 which only connects to LCD displays,
> it turns out that the channel 1 can be connected to multiple controllers in
> the SoC (HDMI and TV encoders for example). And while the simultaneous use
> of HDMI and TV outputs cannot be achieved, switching from one to the other
> at runtime definitely sounds plausible.
> 
> Add an extra property, allwinner,tcon-channel, to specify for a given
> endpoint which TCON channel it is connected to, while falling back to the
> previous mechanism if that property is missing.
> 
> Acked-by: Chen-Yu Tsai <wens@...e.org>
> Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> ---
>  Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt | 11 ++++---
>  1 file changed, 7 insertions(+), 4 deletions(-)

Acked-by: Rob Herring <robh@...nel.org>