From: Boris Brezillon <boris.brezillon@free-electrons.com>
To: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>,
alsa-devel@alsa-project.org,
Florian Fainelli <f.fainelli@gmail.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Lee Jones <lee@kernel.org>, Liam Girdwood <lgirdwood@gmail.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Mark Brown <broonie@kernel.org>,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 2/3] drm/vc4: Add HDMI audio support
Date: Tue, 28 Feb 2017 10:19:17 +0100 [thread overview]
Message-ID: <20170228101917.40810aa9@bbrezillon> (raw)
In-Reply-To: <20170227202803.12855-2-eric@anholt.net>
On Mon, 27 Feb 2017 12:28:02 -0800
Eric Anholt <eric@anholt.net> wrote:
> The HDMI encoder IP embeds all needed blocks to output audio, with a
> custom DAI called MAI moving audio between the two parts of the HDMI
> core. This driver now exposes a sound card to let users stream audio
> to their display.
>
> Using the hdmi-codec driver has been considered here, but MAI meant
> having to significantly rework hdmi-codec, and it would have left
> little shared code with the I2S mode anyway.
>
> The encoder requires that the audio be SPDIF-formatted frames only,
> which alsalib will format-convert for us.
>
> This patch is the combined work of Eric Anholt (initial register setup
> with a separate dmaengine driver and using simple-audio-card) and
> Boris Brezillon (moving it all into HDMI, massive debug to get it
> actually working), and which Eric has the permission to release.
>
> v2: Drop "-audio" from sound card name, since that's already implied
> (suggestion by Boris)
>
> Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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next prev parent reply other threads:[~2017-02-28 9:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-27 20:28 [PATCH v2 1/3] dt-bindings: Document the dmas and dma-names properties for VC4 HDMI Eric Anholt
2017-02-27 20:28 ` [PATCH v2 2/3] drm/vc4: Add HDMI audio support Eric Anholt
2017-02-28 9:19 ` Boris Brezillon [this message]
2017-03-16 18:13 ` Eric Anholt
2017-02-27 20:28 ` [PATCH v2 3/3] ARM: dts: bcm283x: Add HDMI audio related properties Eric Anholt
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