linux-kernel - Re: [PATCH 2/2] drm: tegra: Add HDMI support

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Message-ID: <CACna6rycZ=TGHP7KpVa_r0JSpc6c=PB89pijR9E_4A=bQ=74Bw@mail.gmail.com>
Date:	Fri, 9 Nov 2012 16:45:19 +0100
From:	Rafał Miłecki <zajec5@...il.com>
To:	Thierry Reding <thierry.reding@...onic-design.de>
Cc:	Dave Airlie <airlied@...hat.com>, linux-tegra@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 2/2] drm: tegra: Add HDMI support

2012/11/9 Thierry Reding <thierry.reding@...onic-design.de>:
> +/* all fields little endian */
> +struct hdmi_audio_infoframe {
> +       /* PB0 */
> +       u8 csum;
> +
> +       /* PB1 */
> +       unsigned cc:3; /* channel count */
> +       unsigned res1:1;
> +       unsigned ct:4; /* coding type */
> +
> +       /* PB2 */
> +       unsigned ss:2; /* sample size */
> +       unsigned sf:3; /* sample frequency */
> +       unsigned res2:3;
> +
> +       /* PB3 */
> +       unsigned cxt:5; /* coding extention type */
> +       unsigned res3:3;
> +
> +       /* PB4 */
> +       u8 ca; /* channel/speaker allocation */
> +
> +       /* PB5 */
> +       unsigned res5:3;
> +       unsigned lsv:4; /* level shift value */
> +       unsigned dm_inh:1; /* downmix inhibit */
> +
> +       /* PB6-10 reserved */
> +       u8 res6;
> +       u8 res7;
> +       u8 res8;
> +       u8 res9;
> +       u8 res10;
> +} __packed;

I was told it won't work on different endian devices. See
[RFC][PATCH] drm/radeon/hdmi: define struct for AVI infoframe
http://lists.freedesktop.org/archives/dri-devel/2012-May/022544.html

-- 
Rafał
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