Messages in this thread | | | Date | Tue, 28 Feb 2017 10:19:17 +0100 | From | Boris Brezillon <> | Subject | Re: [PATCH v2 2/3] drm/vc4: Add HDMI audio support |
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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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