linux-kernel - Re: [PATCH v2 1/2] drm: bridge: dw-hdmi: Take input format from plat

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Date:   Fri, 3 Mar 2017 17:22:19 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:     <dri-devel@...ts.freedesktop.org>,
        <laurent.pinchart+renesas@...asonboard.com>,
        <kieran.bingham@...asonboard.com>,
        <linux-amlogic@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] drm: bridge: dw-hdmi: Take input format from
 plat_data

Hi Neil,


On 03-03-2017 16:42, Neil Armstrong wrote:
>
> Sure, I was meaning the *input* format the controller receives from the
> pixel encoder, I'm quite sure the format is strict.
>

Hmm, not quite following you here. As far as the controller goes
it supports the formats I mentioned:
    -    8/10/12/16 bits RGB 4:4:4
    -    8/10/12/16 bits YCbCr 4:4:4
    -    8/10/12 bits YCbCr 4:2:2
    -    8/10/12/16 bits YCbCr 4:2:0

As for the CSC it supports RGB 4:4:4 to/from YCbCr 4:4:4 or 4:2:2
in every defined color depth.

So, everything except 4:2:0 (I had to check documentation, I
though that CSC supported less formats).

Of course this is all limited by the implementation that HW team
decides to choose.

Best regards,
Jose Miguel Abreu