linux-kernel - Re: [PATCH 2/5] drm/bridge: add encoder support to specify bridge input format

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Message-ID: <2679412.W4MLjRXsPJ@jernej-laptop>
Date:   Mon, 27 May 2019 17:29:33 +0200
From:   Jernej Škrabec <jernej.skrabec@...l.net>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     a.hajda@...sung.com, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, hverkuil@...all.nl,
        dri-devel@...ts.freedesktop.org, heiko@...ech.de,
        maxime.ripard@...tlin.com, hjc@...k-chips.com,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] drm/bridge: add encoder support to specify bridge input format

Hi!

Thanks for working on this!

Dne ponedeljek, 20. maj 2019 ob 15:37:50 CEST je Neil Armstrong napisal(a):
> This patch adds a new format_set() callback to the bridge ops permitting
> the encoder to specify the new input format and encoding.
> 
> This allows supporting the very specific HDMI2.0 YUV420 output mode
> when the bridge cannot convert from RGB or YUV444 to YUV420.
> 
> In this case, the encode must downsample before the bridge and must
> specify the bridge the new input bus format differs.
> 
> This will also help supporting the YUV420 mode where the bridge cannot
> downsample, and also support 10bit, 12bit and 16bit output modes
> when the bridge cannot convert between different bit depths.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---

Reviewed-by: Jernej Skrabec <jernej.skrabec@...l.net>

Best regards,
Jernej