linux-kernel - Re: [PATCH 2/5] drm/stm: ltdc: add YCbCr 422 output support

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Message-ID: <e324c3cc-6109-7862-1cdf-2f8e3cc50cca@foss.st.com>
Date:   Tue, 4 Jan 2022 11:24:02 +0100
From:   Philippe CORNU <philippe.cornu@...s.st.com>
To:     Yannick Fertre <yannick.fertre@...s.st.com>,
        Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/5] drm/stm: ltdc: add YCbCr 422 output support



On 12/15/21 10:47 PM, Yannick Fertre wrote:
> LTDC 40100 hw version supports the YCbCr 422 output,
> reducing the output pins from 24 to 16. This feature
> is useful for some external devices like HDMI bridges.
> 
> Both ITU-R BT.601 & ITU-R BT.709 are supported.
> 
> It is also possible to choose the chrominance order between
> * Cb is output first (Y0Cb, then Y1Cr, Y2Cb and so on).
> * Cr is output first (Y0Cr, then Y1Cb, Y2Cr and so on).
> 
> Signed-off-by: Yannick Fertre <yannick.fertre@...s.st.com>
> ---
>   drivers/gpu/drm/stm/ltdc.c | 44 +++++++++++++++++++++++++++++++++++++-
>   drivers/gpu/drm/stm/ltdc.h |  1 +
>   2 files changed, 44 insertions(+), 1 deletion(-)
> 

Hi Yannick,
many thanks for your patch.
Acked-by: Philippe Cornu <philippe.cornu@...s.st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@...s.st.com>
Philippe :-)