linux-kernel - Re: [RFC PATCH] ARM: dts: sun8i: add simplefb node for H3

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Date:   Mon, 28 Nov 2016 11:42:18 +0100
From:   Jean-Francois Moine <moinejf@...e.fr>
To:     Icenowy Zheng <icenowy@...c.xyz>
Cc:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [RFC PATCH] ARM: dts: sun8i: add simplefb node for H3

On Mon, 28 Nov 2016 17:59:00 +0800
Icenowy Zheng <icenowy@...c.xyz> wrote:

> As there's currently a fork of U-Boot which provides simplefb support
> for H3, a simplefb node can be added to the device tree.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>
> ---
> 
> I'm still not sure which pipeline should I use.
> 
> And, it seems that HDMI Slow Clock is not needed?
> 
> (seems that it's only for EDID, but simplefb won't use EDID)

So, I don't see how this may work.
How can the u-boot know the resolutions of the HDMI display device?

In other words: I have a new H3 board with the last u-boot and kernel.
I plug my (rather old or brand new) HDMI display device.
After powering on the system, I hope to get something on the screen.
How?

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/